chore(release): bump version to 1.1.0

This can be used to support more schedule formats in the future.

.env.test

@@ -0,0 +1,26 @@
+# Schedule
+# SCHEDULE_INIT_URL=
+SCHEDULE_DISABLE_AUTO_UPDATE=1
+
+# Basic authorization
+JWT_SECRET="test-secret-at-least-256-bits-used"
+
+# VKID
+VK_ID_CLIENT_ID=0
+VK_ID_REDIRECT_URI="vk0://vk.com/blank.html"
+
+# Telegram Mini-App
+TELEGRAM_BOT_ID=0
+TELEGRAM_MINI_APP_HOST=example.com
+TELEGRAM_TEST_DC=false
+
+# Yandex Cloud
+YANDEX_CLOUD_API_KEY=""
+YANDEX_CLOUD_FUNC_ID=""
+
+# Firebase
+# GOOGLE_APPLICATION_CREDENTIALS=
+
+# LOGGING
+RUST_BACKTRACE=1
+# RUST_LOG=debug

.github/workflows/release.yml

@@ -40,13 +40,18 @@ jobs:
 
       - name: Test
         run: |
-          touch .env.test
           cargo test --verbose
         env:
           DATABASE_URL: ${{ env.TEST_DB }}
+          SCHEDULE_DISABLE_AUTO_UPDATE: 1
           JWT_SECRET: "test-secret-at-least-256-bits-used"
-          VKID_CLIENT_ID: 0
-          VKID_REDIRECT_URI: "vk0://vk.com/blank.html"
+          VK_ID_CLIENT_ID: 0
+          VK_ID_REDIRECT_URI: "vk0://vk.com/blank.html"
+          TELEGRAM_BOT_ID: 0
+          TELEGRAM_MINI_APP_HOST: example.com
+          TELEGRAM_TEST_DC: false
+          YANDEX_CLOUD_API_KEY: ""
+          YANDEX_CLOUD_FUNC_ID: ""
   build:
     name: Build
     runs-on: ubuntu-latest

.github/workflows/test.yml

@@ -3,6 +3,7 @@ name: cargo test
 on:
   push:
     branches: [ "master" ]
+    tags-ignore: [ "release/v*" ]
 
 permissions:
   contents: read
@@ -17,14 +18,20 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+
       - name: Build
         run: cargo build
-      - name: Create .env.test
-        run: touch .env.test
+
       - name: Run tests
         run: cargo test
         env:
           DATABASE_URL: ${{ secrets.TEST_DATABASE_URL }}
+          SCHEDULE_DISABLE_AUTO_UPDATE: 1
           JWT_SECRET: "test-secret-at-least-256-bits-used"
-          VKID_CLIENT_ID: 0
-          VKID_REDIRECT_URI: "vk0://vk.com/blank.html"
+          VK_ID_CLIENT_ID: 0
+          VK_ID_REDIRECT_URI: "vk0://vk.com/blank.html"
+          TELEGRAM_BOT_ID: 0
+          TELEGRAM_MINI_APP_HOST: example.com
+          TELEGRAM_TEST_DC: false
+          YANDEX_CLOUD_API_KEY: ""
+          YANDEX_CLOUD_FUNC_ID: ""

.idea/schedule-parser-rusted.iml

@@ -4,9 +4,13 @@
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/lib/schedule_parser/src" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/benches" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/actix-macros/src" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/actix-test/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/schedule-parser/benches" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/schedule-parser/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/providers/base/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/providers/provider-engels-polytechnic/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/providers/src" isTestSource="false" />
       <excludeFolder url="file://$MODULE_DIR$/actix-macros/target" />
       <excludeFolder url="file://$MODULE_DIR$/actix-test/target" />
       <excludeFolder url="file://$MODULE_DIR$/target" />

Cargo.toml

@@ -1,9 +1,9 @@
 [workspace]
-members = ["actix-macros", "actix-test"]
+members = ["actix-macros", "actix-test", "providers"]
 
 [package]
 name = "schedule-parser-rusted"
-version = "0.8.0"
+version = "1.1.0"
 edition = "2024"
 publish = false
 
@@ -11,43 +11,65 @@ publish = false
 debug = true
 
 [dependencies]
-actix-web = "4.10.2"
+providers = { path = "providers" }
 actix-macros = { path = "actix-macros" }
-bcrypt = "0.17.0"
-calamine = "0.26.1"
+
+# serve api
+actix-web = "4"
+
+# basic
 chrono = { version = "0.4.40", features = ["serde"] }
-derive_more = "2.0.1"
+derive_more = { version = "2", features = ["full"] }
+dotenvy = "0.15.7"
+
+# sql
 diesel = { version = "2.2.8", features = ["postgres"] }
 diesel-derive-enum = { git = "https://github.com/Havunen/diesel-derive-enum.git", features = ["postgres"] }
-dotenvy = "0.15.7"
+
+# logging
 env_logger = "0.11.7"
-firebase-messaging-rs = { git = "https://github.com/i10416/firebase-messaging-rs.git" }
+
+# async
+tokio = { version = "1.44.1", features = ["macros", "rt-multi-thread"] }
+tokio-util = "0.7.16"
 futures-util = "0.3.31"
-fuzzy-matcher = "0.3.7"
+
+# authorization
+bcrypt = "0.17.0"
 jsonwebtoken = { version = "9.3.1", features = ["use_pem"] }
-hex = "0.4.3"
-mime = "0.3.17"
+
+# creating users
 objectid = "0.2.0"
-regex = "1.11.1"
+
+# schedule downloader
 reqwest = { version = "0.12.15", features = ["json"] }
-sentry = "0.37.0"
-sentry-actix = "0.37.0"
+mime = "0.3.17"
+
+# error handling
+sentry = "0.42.0"
+sentry-actix = "0.42.0"
+
+# [de]serializing
 serde = { version = "1.0.219", features = ["derive"] }
 serde_json = "1.0.140"
 serde_with = "3.12.0"
-serde_repr = "0.1.20"
-sha1 = "0.11.0-pre.5"
-tokio = { version = "1.44.1", features = ["macros", "rt-multi-thread"] }
-rand = "0.9.0"
+
+sha1 = "0.11.0-rc.0"
+
+# documentation
 utoipa = { version = "5", features = ["actix_extras", "chrono"] }
-utoipa-rapidoc = { version = "6.0.0", features = ["actix-web"] }
+utoipa-rapidoc = { version = "6", features = ["actix-web"] }
 utoipa-actix-web = "0.1"
-uuid = { version = "1.16.0", features = ["v4"] }
+
+uuid = { version = "1", features = ["v4"] }
+hex-literal = "1"
+log = "0.4"
+
+# telegram webdata deciding and verify
+base64 = "0.22"
+percent-encoding = "2.3"
+ed25519-dalek = "2"
 
 [dev-dependencies]
+providers = { path = "providers", features = ["test"] }
 actix-test = { path = "actix-test" }
-criterion = "0.5.1"
-
-[[bench]]
-name = "parse"
-harness = false

Dockerfile

@@ -6,7 +6,7 @@ ARG BINARY_NAME
 WORKDIR /app/
 
 RUN apt update && \
-    apt install -y libpq5
+    apt install -y libpq5 ca-certificates openssl
 
 COPY ./${BINARY_NAME} /bin/main
 RUN chmod +x /bin/main

actix-macros/Cargo.lock

@@ -1,7 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-version = 4
-
-[[package]]
-name = "actix-utility-macros"
-version = "0.1.0"

actix-macros/Cargo.toml

@@ -4,9 +4,9 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-syn = "2.0.100"
-quote = "1.0.40"
-proc-macro2 = "1.0.94"
+syn = "2"
+quote = "1"
+proc-macro2 = "1"
 
 [lib]
 proc-macro = true

actix-macros/src/lib.rs

@@ -62,7 +62,7 @@ mod shared {
     }
 }
 
-mod response_error_message {
+mod middleware_error {
     use proc_macro::TokenStream;
     use quote::quote;
 
@@ -81,28 +81,7 @@ mod response_error_message {
 
                 fn error_response(&self) -> ::actix_web::HttpResponse<BoxBody> {
                     ::actix_web::HttpResponse::build(self.status_code())
-                        .json(crate::utility::error::ResponseErrorMessage::new(self.clone()))
-                }
-            }
-        })
-    }
-}
-
-mod status_code {
-    use proc_macro::TokenStream;
-    use quote::quote;
-
-    pub fn fmt(ast: &syn::DeriveInput) -> TokenStream {
-        let name = &ast.ident;
-
-        let status_code_arms = super::shared::get_arms(ast);
-
-        TokenStream::from(quote! {
-            impl crate::routes::schema::PartialStatusCode for #name {
-                fn status_code(&self) -> ::actix_web::http::StatusCode {
-                    match self {
-                        #(#status_code_arms)*
-                    }
+                        .json(crate::middlewares::error::MiddlewareError::new(self.clone()))
                 }
             }
         })
@@ -130,7 +109,7 @@ mod responder_json {
     }
 }
 
-mod into_response_error {
+mod ok_response {
     use proc_macro::TokenStream;
     use quote::quote;
 
@@ -138,46 +117,37 @@ mod into_response_error {
         let name = &ast.ident;
 
         TokenStream::from(quote! {
-            impl ::core::convert::Into<crate::routes::schema::ResponseError<#name>> for #name {
-                fn into(self) -> crate::routes::schema::ResponseError<#name> {
-                    crate::routes::schema::ResponseError {
-                        code: self,
-                        message: ::core::option::Option::None,
-                    }
-                }
-            }
-
-            impl<T> crate::routes::schema::IntoResponseAsError<T> for #name
-            where
-                T: ::serde::ser::Serialize + ::utoipa::PartialSchema {}
-        })
-    }
-
-    pub fn fmt_named(ast: &syn::DeriveInput) -> TokenStream {
-        let name = &ast.ident;
-
-        TokenStream::from(quote! {
-            impl ::core::convert::Into<crate::routes::schema::ResponseError<#name>> for #name {
-                fn into(self) -> crate::routes::schema::ResponseError<#name> {
-                    crate::routes::schema::ResponseError {
-                        message: ::core::option::Option::Some(format!("{}", self)),
-                        code: self,
-                    }
-                }
-            }
-
-            impl<T> crate::routes::schema::IntoResponseAsError<T> for #name
-            where
-                T: ::serde::ser::Serialize + ::utoipa::PartialSchema {}
+            impl crate::routes::schema::PartialOkResponse for #name {}
         })
     }
 }
 
-#[proc_macro_derive(ResponseErrorMessage, attributes(status_code))]
-pub fn rem_derive(input: TokenStream) -> TokenStream {
+mod err_response {
+    use proc_macro::TokenStream;
+    use quote::quote;
+
+    pub fn fmt(ast: &syn::DeriveInput) -> TokenStream {
+        let name = &ast.ident;
+
+        let status_code_arms = super::shared::get_arms(ast);
+
+        TokenStream::from(quote! {
+            impl crate::routes::schema::PartialErrResponse for #name {
+                fn status_code(&self) -> ::actix_web::http::StatusCode {
+                    match self {
+                        #(#status_code_arms)*
+                    }
+                }
+            }
+        })
+    }
+}
+
+#[proc_macro_derive(MiddlewareError, attributes(status_code))]
+pub fn moddleware_error_derive(input: TokenStream) -> TokenStream {
     let ast = syn::parse(input).unwrap();
 
-    response_error_message::fmt(&ast)
+    middleware_error::fmt(&ast)
 }
 
 #[proc_macro_derive(ResponderJson)]
@@ -187,23 +157,16 @@ pub fn responser_json_derive(input: TokenStream) -> TokenStream {
     responder_json::fmt(&ast)
 }
 
-#[proc_macro_derive(IntoResponseError)]
-pub fn into_response_error_derive(input: TokenStream) -> TokenStream {
+#[proc_macro_derive(OkResponse)]
+pub fn ok_response_derive(input: TokenStream) -> TokenStream {
     let ast = syn::parse(input).unwrap();
 
-    into_response_error::fmt(&ast)
+    ok_response::fmt(&ast)
 }
 
-#[proc_macro_derive(IntoResponseErrorNamed)]
-pub fn into_response_error_named_derive(input: TokenStream) -> TokenStream {
+#[proc_macro_derive(ErrResponse, attributes(status_code))]
+pub fn err_response_derive(input: TokenStream) -> TokenStream {
     let ast = syn::parse(input).unwrap();
 
-    into_response_error::fmt_named(&ast)
-}
-
-#[proc_macro_derive(StatusCode, attributes(status_code))]
-pub fn status_code_derive(input: TokenStream) -> TokenStream {
-    let ast = syn::parse(input).unwrap();
-
-    status_code::fmt(&ast)
+    err_response::fmt(&ast)
 }

actix-test/Cargo.toml

@@ -4,5 +4,5 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-actix-http = "3.10.0"
-actix-web = "4.10.2"
+actix-http = "3"
+actix-web = "4"

benches/parse.rs

@@ -1,12 +0,0 @@
-use criterion::{Criterion, criterion_group, criterion_main};
-
-use schedule_parser_rusted::parser::parse_xls;
-
-pub fn bench_parse_xls(c: &mut Criterion) {
-    let buffer: Vec<u8> = include_bytes!("../schedule.xls").to_vec();
-
-    c.bench_function("parse_xls", |b| b.iter(|| parse_xls(&buffer).unwrap()));
-}
-
-criterion_group!(benches, bench_parse_xls);
-criterion_main!(benches);

migrations/2025-05-28-185850_add_tg_id_to_users/down.sql

@@ -0,0 +1,2 @@
+ALTER TABLE users DROP CONSTRAINT users_telegram_id_key;
+ALTER TABLE users DROP COLUMN telegram_id;

migrations/2025-05-28-185850_add_tg_id_to_users/up.sql

@@ -0,0 +1,2 @@
+ALTER TABLE users ADD telegram_id int8 NULL;
+ALTER TABLE users ADD CONSTRAINT users_telegram_id_key UNIQUE (telegram_id);

migrations/2025-05-28-191056_make_users_password_nullable/down.sql

@@ -0,0 +1,2 @@
+UPDATE users SET "password" = '' WHERE "password" IS NULL;
+ALTER TABLE users ALTER COLUMN "password" SET NOT NULL;

migrations/2025-05-28-191056_make_users_password_nullable/up.sql

@@ -0,0 +1 @@
+ALTER TABLE users ALTER COLUMN "password" DROP NOT NULL;

migrations/2025-05-28-200403_rename_users_app_version_and_make_it_nullable/down.sql

@@ -0,0 +1,3 @@
+UPDATE users SET "android_version" = '' WHERE "android_version" IS NULL;
+ALTER TABLE users ALTER COLUMN "android_version" SET NOT NULL;
+ALTER TABLE users RENAME COLUMN android_version TO "version";

migrations/2025-05-28-200403_rename_users_app_version_and_make_it_nullable/up.sql

@@ -0,0 +1,2 @@
+ALTER TABLE users RENAME COLUMN "version" TO android_version;
+ALTER TABLE users ALTER COLUMN android_version DROP NOT NULL;

migrations/2025-05-29-140941_make_users_group_nullable/down.sql

@@ -0,0 +1,2 @@
+UPDATE users SET "group" = '' WHERE "group" IS NULL;
+ALTER TABLE users ALTER COLUMN "group" SET NOT NULL;

migrations/2025-05-29-140941_make_users_group_nullable/up.sql

@@ -0,0 +1 @@
+ALTER TABLE users ALTER COLUMN "group" DROP NOT NULL;

migrations/2025-05-29-142329_make_users_access_token_nullable/down.sql

@@ -0,0 +1,2 @@
+UPDATE users SET "access_token" = '' WHERE "access_token" IS NULL;
+ALTER TABLE users ALTER COLUMN "access_token" SET NOT NULL;

migrations/2025-05-29-142329_make_users_access_token_nullable/up.sql

@@ -0,0 +1 @@
+ALTER TABLE users ALTER COLUMN "access_token" DROP NOT NULL;

providers/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "providers"
+version = "0.1.0"
+edition = "2024"
+
+[features]
+test = ["provider-engels-polytechnic/test"]
+
+[dependencies]
+base = { path = "base" }
+
+provider-engels-polytechnic = { path = "provider-engels-polytechnic" }

providers/base/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "base"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+tokio-util = "0.7.16"
+async-trait = "0.1.89"
+
+chrono = { version = "0.4.41", features = ["serde"] }
+
+serde = { version = "1.0.219", features = ["derive"] }
+serde_repr = "0.1.20"
+
+utoipa = { version = "5.4.0", features = ["macros", "chrono"] }
+
+sha1 = "0.11.0-rc.0"

providers/base/src/hasher.rs

@@ -1,4 +1,6 @@
 use sha1::Digest;
+use sha1::digest::OutputSizeUser;
+use sha1::digest::typenum::Unsigned;
 use std::hash::Hasher;
 
 /// Hesher returning hash from the algorithm implementing Digest
@@ -12,7 +14,20 @@ where
 {
     /// Obtain hash.
     pub fn finalize(self) -> String {
-        hex::encode(self.digest.finalize().0)
+        static ALPHABET: [char; 16] = [
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
+        ];
+        
+        let mut hex = String::with_capacity(<D as OutputSizeUser>::OutputSize::USIZE * 2);
+
+        for byte in self.digest.finalize().0.into_iter() {
+            let byte: u8 = byte;
+
+            hex.push(ALPHABET[(byte >> 4) as usize]);
+            hex.push(ALPHABET[(byte & 0xF) as usize]);
+        }
+
+        hex
     }
 }
 

providers/base/src/lib.rs

@@ -0,0 +1,289 @@
+use crate::hasher::DigestHasher;
+use async_trait::async_trait;
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use serde_repr::{Deserialize_repr, Serialize_repr};
+use sha1::{Digest, Sha1};
+use std::collections::HashMap;
+use std::hash::Hash;
+use std::sync::Arc;
+use tokio_util::sync::CancellationToken;
+use utoipa::ToSchema;
+
+mod hasher;
+
+// pub(crate) mod internal {
+//     use super::{LessonBoundaries, LessonType};
+//     use chrono::{DateTime, Utc};
+//
+//     /// Data cell storing the group name.
+//     pub struct GroupCellInfo {
+//         /// Column index.
+//         pub column: u32,
+//
+//         /// Text in the cell.
+//         pub name: String,
+//     }
+//
+//     /// Data cell storing the line.
+//     pub struct DayCellInfo {
+//         /// Line index.
+//         pub row: u32,
+//
+//         /// Column index.
+//         pub column: u32,
+//
+//         /// Day name.
+//         pub name: String,
+//
+//         /// Date of the day.
+//         pub date: DateTime<Utc>,
+//     }
+//
+//     /// Data on the time of lessons from the second column of the schedule.
+//     pub struct BoundariesCellInfo {
+//         /// Temporary segment of the lesson.
+//         pub time_range: LessonBoundaries,
+//
+//         /// Type of lesson.
+//         pub lesson_type: LessonType,
+//
+//         /// The lesson index.
+//         pub default_index: Option<u32>,
+//
+//         /// The frame of the cell.
+//         pub xls_range: ((u32, u32), (u32, u32)),
+//     }
+// }
+
+/// The beginning and end of the lesson.
+#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
+pub struct LessonBoundaries {
+    /// The beginning of a lesson.
+    pub start: DateTime<Utc>,
+
+    /// The end of the lesson.
+    pub end: DateTime<Utc>,
+}
+
+/// Type of lesson.
+#[derive(Clone, Hash, PartialEq, Debug, Serialize_repr, Deserialize_repr, ToSchema)]
+#[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+#[repr(u8)]
+pub enum LessonType {
+    /// Обычная.
+    Default = 0,
+
+    /// Допы.
+    Additional,
+
+    /// Перемена.
+    Break,
+
+    /// Консультация.
+    Consultation,
+
+    /// Самостоятельная работа.
+    IndependentWork,
+
+    /// Зачёт.
+    Exam,
+
+    /// Зачёт с оценкой.
+    ExamWithGrade,
+
+    /// Экзамен.
+    ExamDefault,
+
+    /// Курсовой проект.
+    CourseProject,
+
+    /// Защита курсового проекта.
+    CourseProjectDefense,
+}
+
+#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
+pub struct LessonSubGroup {
+    /// Cabinet, if present.
+    pub cabinet: Option<String>,
+
+    /// Full name of the teacher.
+    pub teacher: Option<String>,
+}
+
+#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
+#[serde(rename_all = "camelCase")]
+pub struct Lesson {
+    /// Type.
+    #[serde(rename = "type")]
+    pub lesson_type: LessonType,
+
+    /// Lesson indexes, if present.
+    pub range: Option<[u8; 2]>,
+
+    /// Name.
+    pub name: Option<String>,
+
+    /// The beginning and end.
+    pub time: LessonBoundaries,
+
+    /// List of subgroups.
+    #[serde(rename = "subgroups")]
+    pub subgroups: Option<Vec<Option<LessonSubGroup>>>,
+
+    /// Group name, if this is a schedule for teachers.
+    pub group: Option<String>,
+}
+
+#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
+pub struct Day {
+    /// Day of the week.
+    pub name: String,
+
+    /// Address of another corps.
+    pub street: Option<String>,
+
+    /// Date.
+    pub date: DateTime<Utc>,
+
+    /// List of lessons on this day.
+    pub lessons: Vec<Lesson>,
+}
+
+#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
+pub struct ScheduleEntry {
+    /// The name of the group or name of the teacher.
+    pub name: String,
+
+    /// List of six days.
+    pub days: Vec<Day>,
+}
+
+#[derive(Clone)]
+pub struct ParsedSchedule {
+    /// List of groups.
+    pub groups: HashMap<String, ScheduleEntry>,
+
+    /// List of teachers.
+    pub teachers: HashMap<String, ScheduleEntry>,
+}
+
+/// Represents a snapshot of the schedule parsed from an XLS file.
+#[derive(Clone)]
+pub struct ScheduleSnapshot {
+    /// Timestamp when the Polytechnic website was queried for the schedule.
+    pub fetched_at: DateTime<Utc>,
+
+    /// Timestamp indicating when the schedule was last updated on the Polytechnic website.
+    ///
+    /// <note>
+    /// This value is determined by the website's content and does not depend on the application.
+    /// </note>
+    pub updated_at: DateTime<Utc>,
+
+    /// URL pointing to the XLS file containing the source schedule data.
+    pub url: String,
+
+    /// Parsed schedule data in the application's internal representation.
+    pub data: ParsedSchedule,
+}
+
+impl ScheduleSnapshot {
+    /// Converting the schedule data into a hash.
+    /// ### Important!
+    /// The hash does not depend on the dates.
+    /// If the application is restarted, but the file with source schedule will remain unchanged, then the hash will not change.
+    pub fn hash(&self) -> String {
+        let mut hasher = DigestHasher::from(Sha1::new());
+
+        self.data.teachers.iter().for_each(|e| e.hash(&mut hasher));
+        self.data.groups.iter().for_each(|e| e.hash(&mut hasher));
+
+        hasher.finalize()
+    }
+
+    /// Simply updates the value of [`ScheduleSnapshot::fetched_at`].
+    /// Used for auto-updates.
+    pub fn update(&mut self) {
+        self.fetched_at = Utc::now();
+    }
+}
+
+// #[derive(Clone, Debug, Display, Error, ToSchema)]
+// #[display("row {row}, column {column}")]
+// pub struct ErrorCellPos {
+//     pub row: u32,
+//     pub column: u32,
+// }
+//
+// #[derive(Clone, Debug, Display, Error, ToSchema)]
+// #[display("'{data}' at {pos}")]
+// pub struct ErrorCell {
+//     pub pos: ErrorCellPos,
+//     pub data: String,
+// }
+//
+// impl ErrorCell {
+//     pub fn new(row: u32, column: u32, data: String) -> Self {
+//         Self {
+//             pos: ErrorCellPos { row, column },
+//             data,
+//         }
+//     }
+// }
+
+// #[derive(Clone, Debug, Display, Error, ToSchema)]
+// pub enum ParseError {
+//     /// Errors related to reading XLS file.
+//     #[display("{_0:?}: Failed to read XLS file.")]
+//     #[schema(value_type = String)]
+//     BadXLS(Arc<calamine::XlsError>),
+//
+//     /// Not a single sheet was found.
+//     #[display("No work sheets found.")]
+//     NoWorkSheets,
+//
+//     /// There are no data on the boundaries of the sheet.
+//     #[display("There is no data on work sheet boundaries.")]
+//     UnknownWorkSheetRange,
+//
+//     /// Failed to read the beginning and end of the lesson from the cell
+//     #[display("Failed to read lesson start and end from {_0}.")]
+//     LessonBoundaries(ErrorCell),
+//
+//     /// Not found the beginning and the end corresponding to the lesson.
+//     #[display("No start and end times matching the lesson (at {_0}) was found.")]
+//     LessonTimeNotFound(ErrorCellPos),
+// }
+//
+// impl Serialize for ParseError {
+//     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+//     where
+//         S: Serializer,
+//     {
+//         match self {
+//             ParseError::BadXLS(_) => serializer.serialize_str("BAD_XLS"),
+//             ParseError::NoWorkSheets => serializer.serialize_str("NO_WORK_SHEETS"),
+//             ParseError::UnknownWorkSheetRange => {
+//                 serializer.serialize_str("UNKNOWN_WORK_SHEET_RANGE")
+//             }
+//             ParseError::LessonBoundaries(_) => serializer.serialize_str("GLOBAL_TIME"),
+//             ParseError::LessonTimeNotFound(_) => serializer.serialize_str("LESSON_TIME_NOT_FOUND"),
+//         }
+//     }
+// }
+
+#[async_trait]
+pub trait ScheduleProvider
+where
+    Self: Sync + Send,
+{
+    /// Returns ok when task has been canceled.
+    /// Returns err when error appeared while trying to parse or download schedule
+    async fn start_auto_update_task(
+        &self,
+        cancellation_token: CancellationToken,
+    ) -> Result<(), Box<dyn std::error::Error + Send + Sync + 'static>>;
+
+    async fn get_schedule(&self) -> Arc<ScheduleSnapshot>;
+}

providers/provider-engels-polytechnic/Cargo.toml

@@ -0,0 +1,32 @@
+[package]
+name = "provider-engels-polytechnic"
+version = "0.1.0"
+edition = "2024"
+
+[features]
+test = []
+
+[dependencies]
+base = { path = "../base" }
+
+tokio = { version = "1.47.1", features = ["sync", "macros", "time"] }
+tokio-util = "0.7.16"
+
+chrono = { version = "0.4.41", features = ["serde"] }
+
+serde = { version = "1.0.219", features = ["derive"] }
+
+derive_more = { version = "2.0.1", features = ["error", "display"] }
+
+utoipa = { version = "5.4.0", features = ["macros", "chrono"] }
+
+calamine = "0.30.0"
+async-trait = "0.1.89"
+
+reqwest = "0.12.23"
+ua_generator = "0.5.22"
+regex = "1.11.1"
+strsim = "0.11.1"
+log = "0.4.27"
+sentry = "0.42.0"
+

providers/provider-engels-polytechnic/src/lib.rs

@@ -0,0 +1,85 @@
+use crate::updater::Updater;
+use async_trait::async_trait;
+use base::{ScheduleProvider, ScheduleSnapshot};
+use std::ops::DerefMut;
+use std::sync::Arc;
+use std::time::Duration;
+use tokio::sync::RwLock;
+use tokio::time::interval;
+use tokio_util::sync::CancellationToken;
+
+pub use crate::updater::UpdateSource;
+
+mod parser;
+mod updater;
+mod xls_downloader;
+
+#[cfg(feature = "test")]
+pub mod test_utils {
+    pub use crate::parser::test_utils::test_result;
+}
+
+pub struct EngelsPolytechnicProvider {
+    updater: Updater,
+    snapshot: Arc<ScheduleSnapshot>,
+}
+
+impl EngelsPolytechnicProvider {
+    pub async fn new(
+        update_source: UpdateSource,
+    ) -> Result<Arc<dyn ScheduleProvider>, crate::updater::error::Error> {
+        let (updater, snapshot) = Updater::new(update_source).await?;
+
+        Ok(Arc::new(Wrapper {
+            inner: RwLock::new(Self {
+                updater,
+                snapshot: Arc::new(snapshot),
+            }),
+        }))
+    }
+}
+
+pub struct Wrapper {
+    inner: RwLock<EngelsPolytechnicProvider>,
+}
+
+#[async_trait]
+impl ScheduleProvider for Wrapper {
+    async fn start_auto_update_task(
+        &self,
+        cancellation_token: CancellationToken,
+    ) -> Result<(), Box<dyn std::error::Error + Send + Sync + 'static>> {
+        let mut ticker = interval(Duration::from_secs(60 * 30));
+        ticker.tick().await; // bc we already have the latest schedule, when instantiating provider
+
+        loop {
+            tokio::select! {
+                _ = ticker.tick() => {
+                    let mut lock = self.inner.write().await;
+                    let this= lock.deref_mut();
+
+                    log::info!("Updating schedule...");
+
+                    match this.updater.update(&mut this.snapshot).await {
+                        Ok(snapshot) => {
+                            this.snapshot = Arc::new(snapshot);
+                        },
+
+                        Err(err) => {
+                            cancellation_token.cancel();
+                            return Err(err.into());
+                        }
+                    }
+                }
+
+                _ = cancellation_token.cancelled() => {
+                    return Ok(());
+                }
+            }
+        }
+    }
+
+    async fn get_schedule(&self) -> Arc<ScheduleSnapshot> {
+        self.inner.read().await.snapshot.clone()
+    }
+}

providers/provider-engels-polytechnic/src/parser/macros.rs

@@ -0,0 +1,21 @@
+#[macro_export]
+macro_rules! or_continue {
+    ( $e:expr ) => {{
+        if let Some(x) = $e {
+            x
+        } else {
+            continue;
+        }
+    }};
+}
+
+#[macro_export]
+macro_rules! or_break {
+    ( $e:expr ) => {{
+        if let Some(x) = $e {
+            x
+        } else {
+            break;
+        }
+    }};
+}

providers/provider-engels-polytechnic/src/parser/mod.rs

@@ -0,0 +1,912 @@
+use crate::or_continue;
+use crate::parser::error::{ErrorCell, ErrorCellPos};
+use crate::parser::worksheet::WorkSheet;
+use crate::parser::LessonParseResult::{Lessons, Street};
+use base::LessonType::Break;
+use base::{
+    Day, Lesson, LessonBoundaries, LessonSubGroup, LessonType, ParsedSchedule, ScheduleEntry,
+};
+use calamine::{open_workbook_from_rs, Reader, Xls};
+use chrono::{DateTime, Duration, NaiveDate, NaiveTime, Utc};
+use regex::Regex;
+use std::collections::HashMap;
+use std::io::Cursor;
+use std::sync::LazyLock;
+
+mod macros;
+mod worksheet;
+
+pub mod error {
+    use derive_more::{Display, Error};
+    use serde::{Serialize, Serializer};
+    use std::sync::Arc;
+    use utoipa::ToSchema;
+
+    #[derive(Clone, Debug, Display, Error, ToSchema)]
+    #[display("row {row}, column {column}")]
+    pub struct ErrorCellPos {
+        pub row: u32,
+        pub column: u32,
+    }
+
+    #[derive(Clone, Debug, Display, Error, ToSchema)]
+    #[display("'{data}' at {pos}")]
+    pub struct ErrorCell {
+        pub pos: ErrorCellPos,
+        pub data: String,
+    }
+
+    impl ErrorCell {
+        pub fn new(row: u32, column: u32, data: String) -> Self {
+            Self {
+                pos: ErrorCellPos { row, column },
+                data,
+            }
+        }
+    }
+
+    #[derive(Clone, Debug, Display, Error, ToSchema)]
+    pub enum Error {
+        /// Errors related to reading XLS file.
+        #[display("{_0:?}: Failed to read XLS file.")]
+        #[schema(value_type = String)]
+        BadXLS(Arc<calamine::XlsError>),
+
+        /// Not a single sheet was found.
+        #[display("No work sheets found.")]
+        NoWorkSheets,
+
+        /// There are no data on the boundaries of the sheet.
+        #[display("There is no data on work sheet boundaries.")]
+        UnknownWorkSheetRange,
+
+        /// Failed to read the beginning and end of the lesson from the cell
+        #[display("Failed to read lesson start and end from {_0}.")]
+        LessonBoundaries(ErrorCell),
+
+        /// Not found the beginning and the end corresponding to the lesson.
+        #[display("No start and end times matching the lesson (at {_0}) was found.")]
+        LessonTimeNotFound(ErrorCellPos),
+    }
+
+    impl Serialize for Error {
+        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+        where
+            S: Serializer,
+        {
+            match self {
+                Error::BadXLS(_) => serializer.serialize_str("BAD_XLS"),
+                Error::NoWorkSheets => serializer.serialize_str("NO_WORK_SHEETS"),
+                Error::UnknownWorkSheetRange => {
+                    serializer.serialize_str("UNKNOWN_WORK_SHEET_RANGE")
+                }
+                Error::LessonBoundaries(_) => serializer.serialize_str("GLOBAL_TIME"),
+                Error::LessonTimeNotFound(_) => serializer.serialize_str("LESSON_TIME_NOT_FOUND"),
+            }
+        }
+    }
+}
+
+/// Data cell storing the group name.
+pub struct GroupCellInfo {
+    /// Column index.
+    pub column: u32,
+
+    /// Text in the cell.
+    pub name: String,
+}
+
+/// Data cell storing the line.
+pub struct DayCellInfo {
+    /// Line index.
+    pub row: u32,
+
+    /// Column index.
+    pub column: u32,
+
+    /// Day name.
+    pub name: String,
+
+    /// Date of the day.
+    pub date: DateTime<Utc>,
+}
+
+/// Data on the time of lessons from the second column of the schedule.
+pub struct BoundariesCellInfo {
+    /// Temporary segment of the lesson.
+    pub time_range: LessonBoundaries,
+
+    /// Type of lesson.
+    pub lesson_type: LessonType,
+
+    /// The lesson index.
+    pub default_index: Option<u32>,
+
+    /// The frame of the cell.
+    pub xls_range: ((u32, u32), (u32, u32)),
+}
+/// Obtaining a "skeleton" schedule from the working sheet.
+fn parse_skeleton(
+    worksheet: &WorkSheet,
+) -> Result<(Vec<DayCellInfo>, Vec<GroupCellInfo>), crate::parser::error::Error> {
+    let mut groups: Vec<GroupCellInfo> = Vec::new();
+    let mut days: Vec<(u32, String, Option<DateTime<Utc>>)> = Vec::new();
+
+    let worksheet_start = worksheet
+        .start()
+        .ok_or(error::Error::UnknownWorkSheetRange)?;
+    let worksheet_end = worksheet.end().ok_or(error::Error::UnknownWorkSheetRange)?;
+
+    let mut row = worksheet_start.0;
+
+    while row < worksheet_end.0 {
+        row += 1;
+
+        let day_full_name = or_continue!(worksheet.get_string_from_cell(row, 0));
+
+        // parse groups row when days column will found
+        if groups.is_empty() {
+            // переход на предыдущую строку
+            row -= 1;
+
+            for column in (worksheet_start.1 + 2)..=worksheet_end.1 {
+                groups.push(GroupCellInfo {
+                    column,
+                    name: or_continue!(worksheet.get_string_from_cell(row, column))
+                        .replace(" ", ""),
+                });
+            }
+
+            // возврат на текущую строку
+            row += 1;
+        }
+
+        let (day_name, day_date) = {
+            let space_index = match day_full_name.find(' ') {
+                Some(index) => {
+                    if index < 10 {
+                        break;
+                    } else {
+                        index
+                    }
+                }
+                None => break,
+            };
+
+            let name = day_full_name[..space_index].to_string();
+
+            let date_slice = &day_full_name[space_index + 1..];
+            let date = NaiveDate::parse_from_str(date_slice, "%d.%m.%Y")
+                .map(|date| date.and_time(NaiveTime::default()).and_utc())
+                .ok();
+
+            (name, date)
+        };
+
+        days.push((row, day_name, day_date));
+    }
+
+    // fix unparsable day dates
+    let days_max = days.len().min(5);
+
+    for i in 0..days_max {
+        if days[i].2.is_none() && days[i + 1].2.is_some() {
+            days[i].2 = Some(days[i + 1].2.unwrap() - Duration::days(1));
+        }
+    }
+
+    for i in 0..days_max {
+        let i = days_max - i;
+
+        if days[i - 1].2.is_none() && days[i].2.is_some() {
+            days[i - 1].2 = Some(days[i].2.unwrap() - Duration::days(1));
+        }
+    }
+
+    let days = days
+        .into_iter()
+        .map(|day| DayCellInfo {
+            row: day.0,
+            column: 0,
+            name: day.1,
+            date: day.2.unwrap(),
+        })
+        .collect();
+
+    Ok((days, groups))
+}
+
+/// The result of obtaining a lesson from the cell.
+enum LessonParseResult {
+    /// List of lessons long from one to two.
+    ///
+    /// The number of lessons will be equal to one if the couple is the first in the day,
+    /// otherwise the list from the change template and the lesson itself will be returned.
+    Lessons(Vec<Lesson>),
+
+    /// Street on which the Polytechnic Corps is located.
+    Street(String),
+}
+
+// noinspection GrazieInspection
+/// Obtaining a non-standard type of lesson by name.
+fn guess_lesson_type(text: &String) -> Option<LessonType> {
+    static MAP: LazyLock<HashMap<&str, LessonType>> = LazyLock::new(|| {
+        HashMap::from([
+            ("консультация", LessonType::Consultation),
+            ("самостоятельная работа", LessonType::IndependentWork),
+            ("зачет", LessonType::Exam),
+            ("зачет с оценкой", LessonType::ExamWithGrade),
+            ("экзамен", LessonType::ExamDefault),
+            ("курсовой проект", LessonType::CourseProject),
+            ("защита курсового проекта", LessonType::CourseProjectDefense),
+        ])
+    });
+
+    let name_lower = text.to_lowercase();
+
+    match MAP
+        .iter()
+        .map(|(text, lesson_type)| (lesson_type, strsim::levenshtein(text, &*name_lower)))
+        .filter(|x| x.1 <= 4)
+        .min_by_key(|(_, score)| *score)
+    {
+        None => None,
+        Some(v) => Some(v.0.clone()),
+    }
+}
+
+/// Getting a pair or street from a cell.
+fn parse_lesson(
+    worksheet: &WorkSheet,
+    day: &Day,
+    day_boundaries: &Vec<BoundariesCellInfo>,
+    lesson_boundaries: &BoundariesCellInfo,
+    group_column: u32,
+) -> Result<LessonParseResult, crate::parser::error::Error> {
+    let row = lesson_boundaries.xls_range.0.0;
+
+    let name = {
+        let cell_data = match worksheet.get_string_from_cell(row, group_column) {
+            Some(x) => x,
+            None => return Ok(Lessons(Vec::new())),
+        };
+
+        static OTHER_STREET_RE: LazyLock<Regex> =
+            LazyLock::new(|| Regex::new(r"^[А-Я][а-я]+[,\s]\d+$").unwrap());
+
+        if OTHER_STREET_RE.is_match(&cell_data) {
+            return Ok(Street(cell_data));
+        }
+
+        cell_data
+    };
+
+    let cell_range = worksheet.get_merge_from_start(row, group_column);
+
+    let (default_range, lesson_time) = {
+        let end_time_arr = day_boundaries
+            .iter()
+            .filter(|time| time.xls_range.1.0 == cell_range.1.0)
+            .collect::<Vec<&BoundariesCellInfo>>();
+
+        let end_time = end_time_arr
+            .first()
+            .ok_or(error::Error::LessonTimeNotFound(ErrorCellPos {
+                row,
+                column: group_column,
+            }))?;
+
+        let range: Option<[u8; 2]> = if lesson_boundaries.default_index != None {
+            let default = lesson_boundaries.default_index.unwrap() as u8;
+            Some([default, end_time.default_index.unwrap() as u8])
+        } else {
+            None
+        };
+
+        let time = LessonBoundaries {
+            start: lesson_boundaries.time_range.start,
+            end: end_time.time_range.end,
+        };
+
+        Ok((range, time))
+    }?;
+
+    let (name, mut subgroups, lesson_type) = parse_name_and_subgroups(&name)?;
+
+    {
+        let cabinets: Vec<String> = parse_cabinets(
+            worksheet,
+            (cell_range.0.0, cell_range.1.0),
+            group_column + 1,
+        );
+
+        let cab_count = cabinets.len();
+
+        if cab_count == 1 {
+            // Назначаем этот кабинет всем подгруппам
+            let cab = Some(cabinets.get(0).unwrap().clone());
+
+            for subgroup in &mut subgroups {
+                if let Some(subgroup) = subgroup {
+                    subgroup.cabinet = cab.clone()
+                }
+            }
+        } else if cab_count == 2 {
+            while subgroups.len() < cab_count {
+                subgroups.push(subgroups.last().unwrap_or(&None).clone());
+            }
+
+            for i in 0..cab_count {
+                let subgroup = subgroups.get_mut(i).unwrap();
+                let cabinet = Some(cabinets.get(i).unwrap().clone());
+
+                match subgroup {
+                    None => {
+                        let _ = subgroup.insert(LessonSubGroup {
+                            teacher: None,
+                            cabinet,
+                        });
+                    }
+                    Some(subgroup) => {
+                        subgroup.cabinet = cabinet;
+                    }
+                }
+            }
+        }
+    };
+
+    let lesson = Lesson {
+        lesson_type: lesson_type.unwrap_or(lesson_boundaries.lesson_type.clone()),
+        range: default_range,
+        name: Some(name),
+        time: lesson_time,
+        subgroups: if subgroups.len() == 2
+            && subgroups.get(0).unwrap().is_none()
+            && subgroups.get(1).unwrap().is_none()
+        {
+            None
+        } else {
+            Some(subgroups)
+        },
+        group: None,
+    };
+
+    let prev_lesson = if day.lessons.is_empty() {
+        return Ok(Lessons(Vec::from([lesson])));
+    } else {
+        &day.lessons[day.lessons.len() - 1]
+    };
+
+    Ok(Lessons(Vec::from([
+        Lesson {
+            lesson_type: Break,
+            range: None,
+            name: None,
+            time: LessonBoundaries {
+                start: prev_lesson.time.end,
+                end: lesson.time.start,
+            },
+            subgroups: Some(Vec::new()),
+            group: None,
+        },
+        lesson,
+    ])))
+}
+
+/// Obtaining a list of cabinets to the right of the lesson cell.
+fn parse_cabinets(worksheet: &WorkSheet, row_range: (u32, u32), column: u32) -> Vec<String> {
+    let mut cabinets: Vec<String> = Vec::new();
+
+    for row in row_range.0..row_range.1 {
+        let raw = or_continue!(worksheet.get_string_from_cell(row, column));
+
+        let clean = raw.replace("\n", " ");
+        let parts: Vec<&str> = clean.split(" ").collect();
+
+        parts.iter().take(2).for_each(|part| {
+            let clean_part = part.to_string().trim().to_string();
+
+            cabinets.push(clean_part);
+        });
+
+        break;
+    }
+
+    cabinets
+}
+
+//noinspection GrazieInspection
+/// Getting the "pure" name of the lesson and list of teachers from the text of the lesson cell.
+fn parse_name_and_subgroups(
+    text: &String,
+) -> Result<(String, Vec<Option<LessonSubGroup>>, Option<LessonType>), crate::parser::error::Error>
+{
+    // Части названия пары:
+    // 1. Само название.
+    // 2. Список преподавателей и подгрупп.
+    // 3. "Модификатор" (чаще всего).
+    //
+    // Регулярное выражение для получения ФИО преподавателей и номеров подгрупп (aka. второй части).
+    // (?:[А-Я][а-я]+\s?(?:[А-Я][\s.]*){2}(?:\(\d\s?[а-я]+\))?(?:, )?)+[\s.]*
+    //
+    // Подробнее:
+    // (?:
+    //     [А-Я][а-я]+         - Фамилия.
+    //     \s?                 - Кто знает, будет ли там пробел.
+    //     (?:[А-Я][\s.]*){2}  - Имя и отчество с учётом случайных пробелов и точек.
+    //     (?:
+    //         \(              - Открытие подгруппы.
+    //         \s?             - Кто знает, будет ли там пробел.
+    //         \d              - Номер подгруппы.
+    //         \s?             - Кто знает, будет ли там пробел.
+    //         [а-я\s]+        - Слово "подгруппа" с учётов ошибок.
+    //         \)              - Закрытие подгруппы.
+    //     )?                  - Явное указание подгруппы может отсутствовать по понятным причинам.
+    //     (?:, )?             - Разделители между отдельными частями.
+    // )+
+    // [\s.]*                  - Забираем с собой всякий мусор, что бы не передать его в третью часть.
+
+    static NAMES_REGEX: LazyLock<Regex> = LazyLock::new(|| {
+        Regex::new(
+            r"(?:[А-Я][а-я]+\s?(?:[А-Я][\s.]*){2}(?:\(\s*\d\s*[а-я\s]+\))?(?:[\s,]+)?){1,2}+[\s.,]*",
+        )
+            .unwrap()
+    });
+
+    // Отчистка
+    static CLEAN_RE: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"[\s\n\t]+").unwrap());
+
+    let text = CLEAN_RE
+        .replace(&text.replace(&[' ', '\t', '\n'], " "), " ")
+        .to_string();
+
+    let (lesson_name, subgroups, lesson_type) = match NAMES_REGEX.captures(&text) {
+        Some(captures) => {
+            let capture = captures.get(0).unwrap();
+
+            let subgroups: Vec<Option<LessonSubGroup>> = {
+                let src = capture.as_str().replace(&[' ', '.'], "");
+
+                let mut shared_subgroup = false;
+                let mut subgroups: [Option<LessonSubGroup>; 2] = [None, None];
+
+                for name in src.split(',') {
+                    let open_bracket_index = name.find('(');
+
+                    let number: u8 = open_bracket_index
+                        .map_or(0, |index| name[(index + 1)..(index + 2)].parse().unwrap());
+
+                    let teacher_name = {
+                        let name_end = open_bracket_index.unwrap_or_else(|| name.len());
+
+                        // Я ебал. Как же я долго до этого доходил.
+                        format!(
+                            "{} {}.{}.",
+                            name.get(..name_end - 4).unwrap(),
+                            name.get(name_end - 4..name_end - 2).unwrap(),
+                            name.get(name_end - 2..name_end).unwrap(),
+                        )
+                    };
+
+                    let lesson = Some(LessonSubGroup {
+                        cabinet: None,
+                        teacher: Some(teacher_name),
+                    });
+
+                    match number {
+                        0 => {
+                            subgroups[0] = lesson;
+                            subgroups[1] = None;
+                            shared_subgroup = true;
+                            break;
+                        }
+                        num => {
+                            // 1 - 1 = 0 | 2 - 1 = 1 | 3 - 1 = 2 (schedule index to array index)
+                            // 0 % 2 = 0 | 1 % 2 = 1 | 2 % 2 = 0 (clamp)
+                            let normalised = (num - 1) % 2;
+
+                            subgroups[normalised as usize] = lesson;
+                        }
+                    }
+                }
+
+                if shared_subgroup {
+                    Vec::from([subgroups[0].take()])
+                } else {
+                    Vec::from(subgroups)
+                }
+            };
+
+            let name = text[..capture.start()].trim().to_string();
+            let extra = text[capture.end()..].trim().to_string();
+
+            let lesson_type = if extra.len() > 4 {
+                let result = guess_lesson_type(&extra);
+
+                if result.is_none() {
+                    #[cfg(not(debug_assertions))]
+                    sentry::capture_message(
+                        &*format!("Не удалось угадать тип пары '{}'!", extra),
+                        sentry::Level::Warning,
+                    );
+
+                    #[cfg(debug_assertions)]
+                    log::warn!("Не удалось угадать тип пары '{}'!", extra);
+                }
+
+                result
+            } else {
+                None
+            };
+
+            (name, subgroups, lesson_type)
+        }
+        None => (text, Vec::new(), None),
+    };
+
+    Ok((lesson_name, subgroups, lesson_type))
+}
+
+/// Getting the start and end of a pair from a cell in the first column of a document.
+///
+/// # Arguments
+///
+/// * `cell_data`: text in cell.
+/// * `date`: date of the current day.
+fn parse_lesson_boundaries_cell(
+    cell_data: &String,
+    date: DateTime<Utc>,
+) -> Option<LessonBoundaries> {
+    static TIME_RE: LazyLock<Regex> =
+        LazyLock::new(|| Regex::new(r"(\d+\.\d+)-(\d+\.\d+)").unwrap());
+
+    let parse_res = if let Some(captures) = TIME_RE.captures(cell_data) {
+        captures
+    } else {
+        return None;
+    };
+
+    let start_match = parse_res.get(1).unwrap().as_str();
+    let start_parts: Vec<&str> = start_match.split(".").collect();
+
+    let end_match = parse_res.get(2).unwrap().as_str();
+    let end_parts: Vec<&str> = end_match.split(".").collect();
+
+    static GET_TIME: fn(DateTime<Utc>, &Vec<&str>) -> DateTime<Utc> = |date, parts| {
+        date + Duration::hours(parts[0].parse::<i64>().unwrap() - 4)
+            + Duration::minutes(parts[1].parse::<i64>().unwrap())
+    };
+
+    Some(LessonBoundaries {
+        start: GET_TIME(date.clone(), &start_parts),
+        end: GET_TIME(date, &end_parts),
+    })
+}
+
+/// Parse the column of the document to obtain a list of day's lesson boundaries.
+///
+/// # Arguments
+///
+/// * `worksheet`: document.
+/// * `date`: date of the current day.
+/// * `row_range`: row boundaries of the current day.
+/// * `column`: column with the required data.
+fn parse_day_boundaries(
+    worksheet: &WorkSheet,
+    date: DateTime<Utc>,
+    row_range: (u32, u32),
+    column: u32,
+) -> Result<Vec<BoundariesCellInfo>, crate::parser::error::Error> {
+    let mut day_times: Vec<BoundariesCellInfo> = Vec::new();
+
+    for row in row_range.0..row_range.1 {
+        let time_cell = if let Some(str) = worksheet.get_string_from_cell(row, column) {
+            str
+        } else {
+            continue;
+        };
+
+        let lesson_time = parse_lesson_boundaries_cell(&time_cell, date.clone()).ok_or(
+            error::Error::LessonBoundaries(ErrorCell::new(row, column, time_cell.clone())),
+        )?;
+
+        // type
+        let lesson_type = if time_cell.contains("пара") {
+            LessonType::Default
+        } else {
+            LessonType::Additional
+        };
+
+        // lesson index
+        let default_index = if lesson_type == LessonType::Default {
+            Some(
+                time_cell
+                    .chars()
+                    .next()
+                    .unwrap()
+                    .to_string()
+                    .parse::<u32>()
+                    .unwrap(),
+            )
+        } else {
+            None
+        };
+
+        day_times.push(BoundariesCellInfo {
+            time_range: lesson_time,
+            lesson_type,
+            default_index,
+            xls_range: worksheet.get_merge_from_start(row, column),
+        });
+    }
+
+    Ok(day_times)
+}
+
+/// Parse the column of the document to obtain a list of week's lesson boundaries.
+///
+/// # Arguments
+///
+/// * `worksheet`: document.
+/// * `week_markup`: markup of the current week.
+fn parse_week_boundaries(
+    worksheet: &WorkSheet,
+    week_markup: &Vec<DayCellInfo>,
+) -> Result<Vec<Vec<BoundariesCellInfo>>, crate::parser::error::Error> {
+    let mut result: Vec<Vec<BoundariesCellInfo>> = Vec::new();
+
+    let worksheet_end_row = worksheet.end().unwrap().0;
+    let lesson_time_column = week_markup[0].column + 1;
+
+    for day_index in 0..week_markup.len() {
+        let day_markup = &week_markup[day_index];
+
+        // Если текущий день не последнему, то индекс строки следующего дня.
+        // Если текущий день - последний, то индекс последней строки документа.
+        let end_row = if day_index != week_markup.len() - 1 {
+            week_markup[day_index + 1].row
+        } else {
+            worksheet_end_row
+        };
+
+        let day_boundaries = parse_day_boundaries(
+            &worksheet,
+            day_markup.date.clone(),
+            (day_markup.row, end_row),
+            lesson_time_column,
+        )?;
+
+        result.push(day_boundaries);
+    }
+
+    Ok(result)
+}
+
+/// Conversion of the list of couples of groups in the list of lessons of teachers.
+fn convert_groups_to_teachers(
+    groups: &HashMap<String, ScheduleEntry>,
+) -> HashMap<String, ScheduleEntry> {
+    let mut teachers: HashMap<String, ScheduleEntry> = HashMap::new();
+
+    let empty_days: Vec<Day> = groups
+        .values()
+        .next()
+        .unwrap()
+        .days
+        .iter()
+        .map(|day| Day {
+            name: day.name.clone(),
+            street: day.street.clone(),
+            date: day.date.clone(),
+            lessons: vec![],
+        })
+        .collect();
+
+    for group in groups.values() {
+        for (index, day) in group.days.iter().enumerate() {
+            for group_lesson in &day.lessons {
+                if group_lesson.lesson_type == Break {
+                    continue;
+                }
+
+                if group_lesson.subgroups.is_none() {
+                    continue;
+                }
+
+                let subgroups = group_lesson.subgroups.as_ref().unwrap();
+
+                for subgroup in subgroups {
+                    let teacher = match subgroup {
+                        None => continue,
+                        Some(subgroup) => match &subgroup.teacher {
+                            None => continue,
+                            Some(teacher) => teacher,
+                        },
+                    };
+
+                    if teacher == "Ошибка в расписании" {
+                        continue;
+                    }
+
+                    if !teachers.contains_key(teacher) {
+                        teachers.insert(
+                            teacher.clone(),
+                            ScheduleEntry {
+                                name: teacher.clone(),
+                                days: empty_days.to_vec(),
+                            },
+                        );
+                    }
+
+                    let teacher_day = teachers
+                        .get_mut(teacher)
+                        .unwrap()
+                        .days
+                        .get_mut(index)
+                        .unwrap();
+
+                    teacher_day.lessons.push({
+                        let mut lesson = group_lesson.clone();
+                        lesson.group = Some(group.name.clone());
+
+                        lesson
+                    });
+                }
+            }
+        }
+    }
+
+    teachers.iter_mut().for_each(|(_, teacher)| {
+        teacher.days.iter_mut().for_each(|day| {
+            day.lessons
+                .sort_by(|a, b| a.range.as_ref().unwrap()[1].cmp(&b.range.as_ref().unwrap()[1]))
+        })
+    });
+
+    teachers
+}
+
+/// Reading XLS Document from the buffer and converting it into the schedule ready to use.
+///
+/// # Arguments
+///
+/// * `buffer`: XLS data containing schedule.
+///
+/// returns: Result<ParseResult, crate::parser::error::Error>
+///
+/// # Examples
+///
+/// ```
+/// use schedule_parser::parse_xls;
+///
+/// let result = parse_xls(&include_bytes!("../../schedule.xls").to_vec());
+///
+/// assert!(result.is_ok(), "{}", result.err().unwrap());
+///
+/// assert_ne!(result.as_ref().unwrap().groups.len(), 0);
+/// assert_ne!(result.as_ref().unwrap().teachers.len(), 0);
+/// ```
+pub fn parse_xls(buffer: &Vec<u8>) -> Result<ParsedSchedule, crate::parser::error::Error> {
+    let cursor = Cursor::new(&buffer);
+    let mut workbook: Xls<_> =
+        open_workbook_from_rs(cursor).map_err(|e| error::Error::BadXLS(std::sync::Arc::new(e)))?;
+
+    let worksheet = {
+        let (worksheet_name, worksheet) = workbook
+            .worksheets()
+            .first()
+            .ok_or(error::Error::NoWorkSheets)?
+            .clone();
+
+        let worksheet_merges = workbook
+            .worksheet_merge_cells(&*worksheet_name)
+            .ok_or(error::Error::NoWorkSheets)?;
+
+        WorkSheet {
+            data: worksheet,
+            merges: worksheet_merges,
+        }
+    };
+
+    let (week_markup, groups_markup) = parse_skeleton(&worksheet)?;
+    let week_boundaries = parse_week_boundaries(&worksheet, &week_markup)?;
+
+    let mut groups: HashMap<String, ScheduleEntry> = HashMap::new();
+
+    for group_markup in groups_markup {
+        let mut group = ScheduleEntry {
+            name: group_markup.name,
+            days: Vec::new(),
+        };
+
+        for day_index in 0..(&week_markup).len() {
+            let day_markup = &week_markup[day_index];
+
+            let mut day = Day {
+                name: day_markup.name.clone(),
+                street: None,
+                date: day_markup.date,
+                lessons: Vec::new(),
+            };
+
+            let day_boundaries = &week_boundaries[day_index];
+
+            for lesson_boundaries in day_boundaries {
+                match &mut parse_lesson(
+                    &worksheet,
+                    &day,
+                    &day_boundaries,
+                    &lesson_boundaries,
+                    group_markup.column,
+                )? {
+                    Lessons(lesson) => day.lessons.append(lesson),
+                    Street(street) => day.street = Some(street.to_owned()),
+                }
+            }
+
+            group.days.push(day);
+        }
+
+        groups.insert(group.name.clone(), group);
+    }
+
+    Ok(ParsedSchedule {
+        teachers: convert_groups_to_teachers(&groups),
+        groups,
+    })
+}
+
+#[cfg(any(test, feature = "test"))]
+pub mod test_utils {
+    use super::*;
+    use base::ParsedSchedule;
+
+    pub fn test_result() -> Result<ParsedSchedule, crate::parser::error::Error> {
+        parse_xls(&include_bytes!("../../../../test-data/engels-polytechnic.xls").to_vec())
+    }
+}
+
+#[cfg(test)]
+pub mod tests {
+    #[test]
+    fn read() {
+        let result = super::test_utils::test_result();
+
+        assert!(result.is_ok(), "{}", result.err().unwrap());
+
+        assert_ne!(result.as_ref().unwrap().groups.len(), 0);
+        assert_ne!(result.as_ref().unwrap().teachers.len(), 0);
+    }
+
+    #[test]
+    fn test_split_lesson() {
+        let result = super::test_utils::test_result();
+        assert!(result.is_ok(), "{}", result.err().unwrap());
+
+        let result = result.unwrap();
+        assert!(result.groups.contains_key("ИС-214/23"));
+
+        let group = result.groups.get("ИС-214/23").unwrap();
+
+        let thursday = group.days.get(3).unwrap();
+        assert_eq!(thursday.lessons.len(), 1);
+
+        let lesson = &thursday.lessons[0];
+        assert_eq!(lesson.range.unwrap()[1], 3);
+        assert!(lesson.subgroups.is_some());
+
+        let subgroups = lesson.subgroups.as_ref().unwrap();
+        assert_eq!(subgroups.len(), 2);
+
+        assert_eq!(
+            subgroups[0].as_ref().unwrap().cabinet,
+            Some("44".to_string())
+        );
+
+        assert_eq!(
+            subgroups[1].as_ref().unwrap().cabinet,
+            Some("43".to_string())
+        );
+    }
+}

providers/provider-engels-polytechnic/src/parser/worksheet.rs

@@ -0,0 +1,58 @@
+use regex::Regex;
+use std::ops::Deref;
+use std::sync::LazyLock;
+
+/// XLS WorkSheet data.
+pub struct WorkSheet {
+    pub data: calamine::Range<calamine::Data>,
+    pub merges: Vec<calamine::Dimensions>,
+}
+
+impl Deref for WorkSheet {
+    type Target = calamine::Range<calamine::Data>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.data
+    }
+}
+
+impl WorkSheet {
+    /// Getting a line from the required cell.
+    pub fn get_string_from_cell(&self, row: u32, col: u32) -> Option<String> {
+        let cell_data = if let Some(data) = self.get((row as usize, col as usize)) {
+            data.to_string()
+        } else {
+            return None;
+        };
+
+        if cell_data.trim().is_empty() {
+            return None;
+        }
+
+        static NL_RE: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"[\n\r]+").unwrap());
+        static SP_RE: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"\s+").unwrap());
+
+        let trimmed_data = SP_RE
+            .replace_all(&NL_RE.replace_all(&cell_data, " "), " ")
+            .trim()
+            .to_string();
+
+        if trimmed_data.is_empty() {
+            None
+        } else {
+            Some(trimmed_data)
+        }
+    }
+
+    /// Obtaining the boundaries of the cell along its upper left coordinate.
+    pub fn get_merge_from_start(&self, row: u32, column: u32) -> ((u32, u32), (u32, u32)) {
+        match self
+            .merges
+            .iter()
+            .find(|merge| merge.start.0 == row && merge.start.1 == column)
+        {
+            Some(merge) => (merge.start, (merge.end.0 + 1, merge.end.1 + 1)),
+            None => ((row, column), (row + 1, column + 1)),
+        }
+    }
+}

providers/provider-engels-polytechnic/src/updater.rs

@@ -0,0 +1,263 @@
+use crate::parser::parse_xls;
+use crate::updater::error::{Error, QueryUrlError, SnapshotCreationError};
+use crate::xls_downloader::{FetchError, XlsDownloader};
+use base::ScheduleSnapshot;
+
+pub enum UpdateSource {
+    Prepared(ScheduleSnapshot),
+
+    Url(String),
+
+    GrabFromSite {
+        yandex_api_key: String,
+        yandex_func_id: String,
+    },
+}
+
+pub struct Updater {
+    downloader: XlsDownloader,
+    update_source: UpdateSource,
+}
+
+pub mod error {
+    use crate::xls_downloader::FetchError;
+    use derive_more::{Display, Error};
+
+    #[derive(Debug, Display, Error)]
+    pub enum Error {
+        /// An error occurred while querying the Yandex Cloud API for a URL.
+        ///
+        /// This may result from network failures, invalid API credentials, or issues with the Yandex Cloud Function invocation.
+        /// See [`QueryUrlError`] for more details about specific causes.
+        QueryUrlFailed(QueryUrlError),
+
+        /// The schedule snapshot creation process failed.
+        ///
+        /// This can happen due to URL conflicts (same URL already in use), failed network requests,
+        /// download errors, or invalid XLS file content. See [`SnapshotCreationError`] for details.
+        SnapshotCreationFailed(SnapshotCreationError),
+    }
+    /// Errors that may occur when querying the Yandex Cloud API to retrieve a URL.
+    #[derive(Debug, Display, Error)]
+    pub enum QueryUrlError {
+        /// Occurs when the request to the Yandex Cloud API fails.
+        ///
+        /// This may be due to network issues, invalid API key, incorrect function ID, or other
+        /// problems with the Yandex Cloud Function invocation.
+        #[display("An error occurred during the request to the Yandex Cloud API: {_0}")]
+        RequestFailed(reqwest::Error),
+    }
+
+    /// Errors that may occur during the creation of a schedule snapshot.
+    #[derive(Debug, Display, Error)]
+    pub enum SnapshotCreationError {
+        /// The URL is the same as the one already being used (no update needed).
+        #[display("The URL is the same as the one already being used.")]
+        SameUrl,
+
+        /// The URL query for the XLS file failed to execute, either due to network issues or invalid API parameters.
+        #[display("Failed to fetch URL: {_0}")]
+        FetchFailed(FetchError),
+
+        /// Downloading the XLS file content failed after successfully obtaining the URL.
+        #[display("Download failed: {_0}")]
+        DownloadFailed(FetchError),
+
+        /// The XLS file could not be parsed into a valid schedule format.
+        #[display("Schedule data is invalid: {_0}")]
+        InvalidSchedule(crate::parser::error::Error),
+    }
+}
+
+impl Updater {
+    /// Constructs a new `ScheduleSnapshot` by downloading and parsing schedule data from the specified URL.
+    ///
+    /// This method first checks if the provided URL is the same as the one already configured in the downloader.
+    /// If different, it updates the downloader's URL, fetches the XLS content, parses it, and creates a snapshot.
+    /// Errors are returned for URL conflicts, network issues, download failures, or invalid data.
+    ///
+    /// # Arguments
+    ///
+    /// * `downloader`: A mutable reference to an `XLSDownloader` implementation used to fetch and parse the schedule data.
+    /// * `url`: The source URL pointing to the XLS file containing schedule data.
+    ///
+    /// returns: Result<ScheduleSnapshot, SnapshotCreationError>
+    pub async fn new_snapshot(
+        downloader: &mut XlsDownloader,
+        url: String,
+    ) -> Result<ScheduleSnapshot, SnapshotCreationError> {
+        if downloader.url.as_ref().is_some_and(|_url| _url.eq(&url)) {
+            return Err(SnapshotCreationError::SameUrl);
+        }
+
+        let head_result = downloader.set_url(&*url).await.map_err(|error| {
+            if let FetchError::Unknown(error) = &error {
+                sentry::capture_error(&error);
+            }
+
+            SnapshotCreationError::FetchFailed(error)
+        })?;
+
+        let xls_data = downloader
+            .fetch(false)
+            .await
+            .map_err(|error| {
+                if let FetchError::Unknown(error) = &error {
+                    sentry::capture_error(&error);
+                }
+
+                SnapshotCreationError::DownloadFailed(error)
+            })?
+            .data
+            .unwrap();
+
+        let parse_result = parse_xls(&xls_data).map_err(|error| {
+            sentry::capture_error(&error);
+
+            SnapshotCreationError::InvalidSchedule(error)
+        })?;
+
+        Ok(ScheduleSnapshot {
+            fetched_at: head_result.requested_at,
+            updated_at: head_result.uploaded_at,
+            url,
+            data: parse_result,
+        })
+    }
+
+    /// Queries the Yandex Cloud Function (FaaS) to obtain a URL for the schedule file.
+    ///
+    /// This sends a POST request to the specified Yandex Cloud Function endpoint,
+    /// using the provided API key for authentication. The returned URI is combined
+    /// with the "https://politehnikum-eng.ru" base domain to form the complete URL.
+    ///
+    /// # Arguments
+    ///
+    /// * `api_key` - Authentication token for Yandex Cloud API
+    /// * `func_id` - ID of the target Yandex Cloud Function to invoke
+    ///
+    /// # Returns
+    ///
+    /// Result containing:
+    /// - `Ok(String)` - Complete URL constructed from the Function's response
+    /// - `Err(QueryUrlError)` - If the request or response processing fails
+    async fn query_url(api_key: &str, func_id: &str) -> Result<String, QueryUrlError> {
+        let client = reqwest::Client::new();
+
+        let uri = client
+            .post(format!(
+                "https://functions.yandexcloud.net/{}?integration=raw",
+                func_id
+            ))
+            .header("Authorization", format!("Api-Key {}", api_key))
+            .send()
+            .await
+            .map_err(|error| QueryUrlError::RequestFailed(error))?
+            .text()
+            .await
+            .map_err(|error| QueryUrlError::RequestFailed(error))?;
+
+        Ok(format!("https://politehnikum-eng.ru{}", uri.trim()))
+    }
+
+    /// Initializes the schedule by fetching the URL from the environment or Yandex Cloud Function (FaaS)
+    /// and creating a [`ScheduleSnapshot`] with the downloaded data.
+    ///
+    /// # Arguments
+    ///
+    /// * `downloader`: Mutable reference to an `XLSDownloader` implementation used to fetch and parse the schedule
+    /// * `app_env`: Reference to the application environment containing either a predefined URL or Yandex Cloud credentials
+    ///
+    /// # Returns
+    ///
+    /// Returns `Ok(())` if the snapshot was successfully initialized, or an `Error` if:
+    /// - URL query to Yandex Cloud failed ([`QueryUrlError`])
+    /// - Schedule snapshot creation failed ([`SnapshotCreationError`])
+    pub async fn new(update_source: UpdateSource) -> Result<(Self, ScheduleSnapshot), Error> {
+        let mut this = Updater {
+            downloader: XlsDownloader::new(),
+            update_source,
+        };
+
+        if let UpdateSource::Prepared(snapshot) = &this.update_source {
+            let snapshot = snapshot.clone();
+            return Ok((this, snapshot));
+        }
+
+        let url = match &this.update_source {
+            UpdateSource::Url(url) => {
+                log::info!("The default link {} will be used", url);
+                url.clone()
+            }
+            UpdateSource::GrabFromSite {
+                yandex_api_key,
+                yandex_func_id,
+            } => {
+                log::info!("Obtaining a link using FaaS...");
+                Self::query_url(yandex_api_key, yandex_func_id)
+                    .await
+                    .map_err(|error| Error::QueryUrlFailed(error))?
+            }
+            _ => unreachable!(),
+        };
+
+        log::info!("For the initial setup, a link {} will be used", url);
+
+        let snapshot = Self::new_snapshot(&mut this.downloader, url)
+            .await
+            .map_err(|error| Error::SnapshotCreationFailed(error))?;
+
+        log::info!("Schedule snapshot successfully created!");
+
+        Ok((this, snapshot))
+    }
+
+    /// Updates the schedule snapshot by querying the latest URL from FaaS and checking for changes.
+    /// If the URL hasn't changed, only updates the [`fetched_at`] timestamp. If changed, downloads
+    /// and parses the new schedule data.
+    ///
+    /// # Arguments
+    ///
+    /// * `downloader`: XLS file downloader used to fetch and parse the schedule data
+    /// * `app_env`: Application environment containing Yandex Cloud configuration and auto-update settings
+    ///
+    /// returns: `Result<(), Error>` - Returns error if URL query fails or schedule parsing encounters issues
+    ///
+    /// # Safety
+    ///
+    /// Use `unsafe` to access the initialized snapshot, guaranteed valid by prior `init()` call
+    pub async fn update(
+        &mut self,
+        current_snapshot: &ScheduleSnapshot,
+    ) -> Result<ScheduleSnapshot, Error> {
+        if let UpdateSource::Prepared(snapshot) = &self.update_source {
+            let mut snapshot = snapshot.clone();
+            snapshot.update();
+            return Ok(snapshot);
+        }
+
+        let url = match &self.update_source {
+            UpdateSource::Url(url) => url.clone(),
+            UpdateSource::GrabFromSite {
+                yandex_api_key,
+                yandex_func_id,
+            } => Self::query_url(yandex_api_key.as_str(), yandex_func_id.as_str())
+                .await
+                .map_err(|error| Error::QueryUrlFailed(error))?,
+            _ => unreachable!(),
+        };
+
+        let snapshot = match Self::new_snapshot(&mut self.downloader, url).await {
+            Ok(snapshot) => snapshot,
+            Err(SnapshotCreationError::SameUrl) => {
+                let mut clone = current_snapshot.clone();
+                clone.update();
+
+                clone
+            }
+            Err(error) => return Err(Error::SnapshotCreationFailed(error)),
+        };
+
+        Ok(snapshot)
+    }
+}

providers/provider-engels-polytechnic/src/xls_downloader.rs

@@ -0,0 +1,237 @@
+use chrono::{DateTime, Utc};
+use derive_more::{Display, Error};
+use std::mem::discriminant;
+use std::sync::Arc;
+use utoipa::ToSchema;
+
+/// XLS data retrieval errors.
+#[derive(Clone, Debug, ToSchema, Display, Error)]
+pub enum FetchError {
+    /// File url is not set.
+    #[display("The link to the timetable was not provided earlier.")]
+    NoUrlProvided,
+
+    /// Unknown error.
+    #[display("An unknown error occurred while downloading the file.")]
+    #[schema(value_type = String)]
+    Unknown(Arc<reqwest::Error>),
+
+    /// Server returned a status code different from 200.
+    #[display("Server returned a status code {status_code}.")]
+    BadStatusCode { status_code: u16 },
+
+    /// The url leads to a file of a different type.
+    #[display("The link leads to a file of type '{content_type}'.")]
+    BadContentType { content_type: String },
+
+    /// Server doesn't return expected headers.
+    #[display("Server doesn't return expected header(s) '{expected_header}'.")]
+    BadHeaders { expected_header: String },
+}
+
+impl FetchError {
+    pub fn unknown(error: Arc<reqwest::Error>) -> Self {
+        Self::Unknown(error)
+    }
+
+    pub fn bad_status_code(status_code: u16) -> Self {
+        Self::BadStatusCode { status_code }
+    }
+
+    pub fn bad_content_type(content_type: &str) -> Self {
+        Self::BadContentType {
+            content_type: content_type.to_string(),
+        }
+    }
+
+    pub fn bad_headers(expected_header: &str) -> Self {
+        Self::BadHeaders {
+            expected_header: expected_header.to_string(),
+        }
+    }
+}
+
+impl PartialEq for FetchError {
+    fn eq(&self, other: &Self) -> bool {
+        discriminant(self) == discriminant(other)
+    }
+}
+
+/// Result of XLS data retrieval.
+#[derive(Debug, PartialEq)]
+pub struct FetchOk {
+    /// File upload date.
+    pub uploaded_at: DateTime<Utc>,
+
+    /// Date data received.
+    pub requested_at: DateTime<Utc>,
+
+    /// File data.
+    pub data: Option<Vec<u8>>,
+}
+
+impl FetchOk {
+    /// Result without file content.
+    pub fn head(uploaded_at: DateTime<Utc>) -> Self {
+        FetchOk {
+            uploaded_at,
+            requested_at: Utc::now(),
+            data: None,
+        }
+    }
+
+    /// Full result.
+    pub fn get(uploaded_at: DateTime<Utc>, data: Vec<u8>) -> Self {
+        FetchOk {
+            uploaded_at,
+            requested_at: Utc::now(),
+            data: Some(data),
+        }
+    }
+}
+
+pub type FetchResult = Result<FetchOk, FetchError>;
+
+pub struct XlsDownloader {
+    pub url: Option<String>,
+}
+
+impl XlsDownloader {
+    pub fn new() -> Self {
+        XlsDownloader { url: None }
+    }
+
+    async fn fetch_specified(url: &str, head: bool) -> FetchResult {
+        let client = reqwest::Client::new();
+
+        let response = if head {
+            client.head(url)
+        } else {
+            client.get(url)
+        }
+        .header("User-Agent", ua_generator::ua::spoof_chrome_ua())
+        .send()
+        .await
+        .map_err(|e| FetchError::unknown(Arc::new(e)))?;
+
+        if response.status().as_u16() != 200 {
+            return Err(FetchError::bad_status_code(response.status().as_u16()));
+        }
+
+        let headers = response.headers();
+
+        let content_type = headers
+            .get("Content-Type")
+            .ok_or(FetchError::bad_headers("Content-Type"))?;
+
+        if !headers.contains_key("etag") {
+            return Err(FetchError::bad_headers("etag"));
+        }
+
+        let last_modified = headers
+            .get("last-modified")
+            .ok_or(FetchError::bad_headers("last-modified"))?;
+
+        if content_type != "application/vnd.ms-excel" {
+            return Err(FetchError::bad_content_type(content_type.to_str().unwrap()));
+        }
+
+        let last_modified = DateTime::parse_from_rfc2822(&last_modified.to_str().unwrap())
+            .unwrap()
+            .with_timezone(&Utc);
+
+        Ok(if head {
+            FetchOk::head(last_modified)
+        } else {
+            FetchOk::get(last_modified, response.bytes().await.unwrap().to_vec())
+        })
+    }
+
+    pub async fn fetch(&self, head: bool) -> FetchResult {
+        if self.url.is_none() {
+            Err(FetchError::NoUrlProvided)
+        } else {
+            Self::fetch_specified(&*self.url.as_ref().unwrap(), head).await
+        }
+    }
+
+    pub async fn set_url(&mut self, url: &str) -> FetchResult {
+        let result = Self::fetch_specified(url, true).await;
+
+        if let Ok(_) = result {
+            self.url = Some(url.to_string());
+        }
+
+        result
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::xls_downloader::{FetchError, XlsDownloader};
+
+    #[tokio::test]
+    async fn bad_url() {
+        let url = "bad_url";
+
+        let mut downloader = XlsDownloader::new();
+        assert!(downloader.set_url(url).await.is_err());
+    }
+
+    #[tokio::test]
+    async fn bad_status_code() {
+        let url = "https://www.google.com/not-found";
+
+        let mut downloader = XlsDownloader::new();
+        assert_eq!(
+            downloader.set_url(url).await,
+            Err(FetchError::bad_status_code(404))
+        );
+    }
+
+    #[tokio::test]
+    async fn bad_headers() {
+        let url = "https://www.google.com/favicon.ico";
+
+        let mut downloader = XlsDownloader::new();
+        assert_eq!(
+            downloader.set_url(url).await,
+            Err(FetchError::BadHeaders {
+                expected_header: "ETag".to_string(),
+            })
+        );
+    }
+
+    #[tokio::test]
+    async fn bad_content_type() {
+        let url = "https://s3.aero-storage.ldragol.ru/679e5d1145a6ad00843ad3f1/67ddb59fd46303008396ac96%2Fexample.txt";
+
+        let mut downloader = XlsDownloader::new();
+        assert!(downloader.set_url(url).await.is_err());
+    }
+
+    #[tokio::test]
+    async fn ok() {
+        let url = "https://s3.aero-storage.ldragol.ru/679e5d1145a6ad00843ad3f1/67ddb5fad46303008396ac97%2Fschedule.xls";
+
+        let mut downloader = XlsDownloader::new();
+        assert!(downloader.set_url(url).await.is_ok());
+    }
+
+    #[tokio::test]
+    async fn downloader_ok() {
+        let url = "https://s3.aero-storage.ldragol.ru/679e5d1145a6ad00843ad3f1/67ddb5fad46303008396ac97%2Fschedule.xls";
+
+        let mut downloader = XlsDownloader::new();
+        assert!(downloader.set_url(url).await.is_ok());
+        assert!(downloader.fetch(false).await.is_ok());
+    }
+
+    #[tokio::test]
+    async fn downloader_no_url_provided() {
+        let downloader = XlsDownloader::new();
+
+        let result = downloader.fetch(false).await;
+        assert_eq!(result, Err(FetchError::NoUrlProvided));
+    }
+}

providers/src/lib.rs

@@ -0,0 +1,9 @@
+pub use base;
+
+pub use provider_engels_polytechnic::EngelsPolytechnicProvider;
+pub use provider_engels_polytechnic::UpdateSource as EngelsPolytechnicUpdateSource;
+
+#[cfg(feature = "test")]
+pub mod test_utils {
+    pub use provider_engels_polytechnic::test_utils as engels_polytechnic;
+}

src/app_state.rs

@@ -1,88 +0,0 @@
-use crate::parser::schema::ParseResult;
-use crate::utility::hasher::DigestHasher;
-use crate::xls_downloader::basic_impl::BasicXlsDownloader;
-use actix_web::web;
-use chrono::{DateTime, Utc};
-use diesel::{Connection, PgConnection};
-use firebase_messaging_rs::FCMClient;
-use sha1::{Digest, Sha1};
-use std::env;
-use std::hash::Hash;
-use std::sync::Mutex;
-
-#[derive(Clone)]
-pub struct Schedule {
-    pub etag: String,
-    pub fetched_at: DateTime<Utc>,
-    pub updated_at: DateTime<Utc>,
-    pub parsed_at: DateTime<Utc>,
-    pub data: ParseResult,
-}
-
-#[derive(Clone)]
-pub struct VkId {
-    pub client_id: i32,
-    pub redirect_url: String,
-}
-
-impl VkId {
-    pub fn new() -> Self {
-        Self {
-            client_id: env::var("VKID_CLIENT_ID")
-                .expect("VKID_CLIENT_ID must be set")
-                .parse()
-                .expect("VKID_CLIENT_ID must be integer"),
-            redirect_url: env::var("VKID_REDIRECT_URI").expect("VKID_REDIRECT_URI must be set"),
-        }
-    }
-}
-
-impl Schedule {
-    pub fn hash(&self) -> String {
-        let mut hasher = DigestHasher::from(Sha1::new());
-
-        self.etag.hash(&mut hasher);
-
-        self.data.teachers.iter().for_each(|e| e.hash(&mut hasher));
-        self.data.groups.iter().for_each(|e| e.hash(&mut hasher));
-
-        hasher.finalize()
-    }
-}
-
-/// Common data provided to endpoints.
-pub struct AppState {
-    pub downloader: Mutex<BasicXlsDownloader>,
-    pub schedule: Mutex<Option<Schedule>>,
-    pub database: Mutex<PgConnection>,
-    pub vk_id: VkId,
-    pub fcm_client: Option<Mutex<FCMClient>>, // в рантайме не меняется, так что опционален мьютекс, а не данные в нём.
-}
-
-impl AppState {
-    pub async fn new() -> Self {
-        let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
-
-        Self {
-            downloader: Mutex::new(BasicXlsDownloader::new()),
-            schedule: Mutex::new(None),
-            database: Mutex::new(
-                PgConnection::establish(&database_url)
-                    .unwrap_or_else(|_| panic!("Error connecting to {}", database_url)),
-            ),
-            vk_id: VkId::new(),
-            fcm_client: if env::var("GOOGLE_APPLICATION_CREDENTIALS").is_ok() {
-                Some(Mutex::new(
-                    FCMClient::new().await.expect("FCM client must be created"),
-                ))
-            } else {
-                None
-            },
-        }
-    }
-}
-
-/// Create a new object web::Data<AppState>.
-pub async fn app_state() -> web::Data<AppState> {
-    web::Data::new(AppState::new().await)
-}

src/database/driver.rs

@@ -1,77 +1,82 @@
 pub mod users {
-    use crate::app_state::AppState;
     use crate::database::models::User;
     use crate::database::schema::users::dsl::users;
     use crate::database::schema::users::dsl::*;
-    use crate::utility::mutex::MutexScope;
+    use crate::state::AppState;
     use actix_web::web;
-    use diesel::{ExpressionMethods, QueryResult, insert_into};
+    use diesel::{insert_into, ExpressionMethods, QueryResult};
     use diesel::{QueryDsl, RunQueryDsl};
     use diesel::{SaveChangesDsl, SelectableHelper};
+    use std::ops::DerefMut;
 
-    pub fn get(state: &web::Data<AppState>, _id: &String) -> QueryResult<User> {
-        state.database.scope(|conn| {
-            users
-                .filter(id.eq(_id))
-                .select(User::as_select())
-                .first(conn)
-        })
+    pub async fn get(state: &web::Data<AppState>, _id: &String) -> QueryResult<User> {
+        users
+            .filter(id.eq(_id))
+            .select(User::as_select())
+            .first(state.get_database().await.deref_mut())
     }
 
-    pub fn get_by_username(state: &web::Data<AppState>, _username: &String) -> QueryResult<User> {
-        state.database.scope(|conn| {
-            users
-                .filter(username.eq(_username))
-                .select(User::as_select())
-                .first(conn)
-        })
+    pub async fn get_by_username(
+        state: &web::Data<AppState>,
+        _username: &String,
+    ) -> QueryResult<User> {
+        users
+            .filter(username.eq(_username))
+            .select(User::as_select())
+            .first(state.get_database().await.deref_mut())
     }
 
     //noinspection RsTraitObligations
-    pub fn get_by_vk_id(state: &web::Data<AppState>, _vk_id: i32) -> QueryResult<User> {
-        state.database.scope(|conn| {
-            users
-                .filter(vk_id.eq(_vk_id))
-                .select(User::as_select())
-                .first(conn)
-        })
+    pub async fn get_by_vk_id(state: &web::Data<AppState>, _vk_id: i32) -> QueryResult<User> {
+        users
+            .filter(vk_id.eq(_vk_id))
+            .select(User::as_select())
+            .first(state.get_database().await.deref_mut())
+    }
+
+    //noinspection RsTraitObligations
+    pub async fn get_by_telegram_id(
+        state: &web::Data<AppState>,
+        _telegram_id: i64,
+    ) -> QueryResult<User> {
+        users
+            .filter(telegram_id.eq(_telegram_id))
+            .select(User::as_select())
+            .first(state.get_database().await.deref_mut())
     }
 
     //noinspection DuplicatedCode
-    pub fn contains_by_username(state: &web::Data<AppState>, _username: &String) -> bool {
+    pub async fn contains_by_username(state: &web::Data<AppState>, _username: &String) -> bool {
         // и как это нахуй сократить блять примеров нихуя нет, нихуя не работает
         // как меня этот раст заебал уже
-        state.database.scope(|conn| {
-            match users
-                .filter(username.eq(_username))
-                .count()
-                .get_result::<i64>(conn)
-            {
-                Ok(count) => count > 0,
-                Err(_) => false,
-            }
-        })
+
+        match users
+            .filter(username.eq(_username))
+            .count()
+            .get_result::<i64>(state.get_database().await.deref_mut())
+        {
+            Ok(count) => count > 0,
+            Err(_) => false,
+        }
     }
 
     //noinspection DuplicatedCode
     //noinspection RsTraitObligations
-    pub fn contains_by_vk_id(state: &web::Data<AppState>, _vk_id: i32) -> bool {
-        state.database.scope(|conn| {
-            match users
-                .filter(vk_id.eq(_vk_id))
-                .count()
-                .get_result::<i64>(conn)
-            {
-                Ok(count) => count > 0,
-                Err(_) => false,
-            }
-        })
+    pub async fn contains_by_vk_id(state: &web::Data<AppState>, _vk_id: i32) -> bool {
+        match users
+            .filter(vk_id.eq(_vk_id))
+            .count()
+            .get_result::<i64>(state.get_database().await.deref_mut())
+        {
+            Ok(count) => count > 0,
+            Err(_) => false,
+        }
     }
 
-    pub fn insert(state: &web::Data<AppState>, user: &User) -> QueryResult<usize> {
-        state
-            .database
-            .scope(|conn| insert_into(users).values(user).execute(conn))
+    pub async fn insert(state: &web::Data<AppState>, user: &User) -> QueryResult<usize> {
+        insert_into(users)
+            .values(user)
+            .execute(state.get_database().await.deref_mut())
     }
 
     /// Function declaration [User::save][UserSave::save].
@@ -113,51 +118,31 @@ pub mod users {
         ///     }
         /// }
         /// ```
-        fn save(&self, state: &web::Data<AppState>) -> QueryResult<User>;
+        async fn save(&self, state: &web::Data<AppState>) -> QueryResult<User>;
     }
 
     /// Implementation of [UserSave][UserSave] trait.
     impl UserSave for User {
-        fn save(&self, state: &web::Data<AppState>) -> QueryResult<User> {
-            state.database.scope(|conn| self.save_changes::<Self>(conn))
+        async fn save(&self, state: &web::Data<AppState>) -> QueryResult<User> {
+            self.save_changes::<Self>(state.get_database().await.deref_mut())
         }
     }
 
     #[cfg(test)]
-    pub fn delete_by_username(state: &web::Data<AppState>, _username: &String) -> bool {
-        state.database.scope(|conn| {
-            match diesel::delete(users.filter(username.eq(_username))).execute(conn) {
-                Ok(count) => count > 0,
-                Err(_) => false,
-            }
-        })
+    pub async fn delete_by_username(state: &web::Data<AppState>, _username: &String) -> bool {
+        match diesel::delete(users.filter(username.eq(_username)))
+            .execute(state.get_database().await.deref_mut())
+        {
+            Ok(count) => count > 0,
+            Err(_) => false,
+        }
     }
 
     #[cfg(test)]
-    pub fn insert_or_ignore(state: &web::Data<AppState>, user: &User) -> QueryResult<usize> {
-        state.database.scope(|conn| {
-            insert_into(users)
-                .values(user)
-                .on_conflict_do_nothing()
-                .execute(conn)
-        })
-    }
-}
-
-pub mod fcm {
-    use crate::app_state::AppState;
-    use crate::database::models::{FCM, User};
-    use crate::utility::mutex::MutexScope;
-    use actix_web::web;
-    use diesel::QueryDsl;
-    use diesel::RunQueryDsl;
-    use diesel::{BelongingToDsl, QueryResult, SelectableHelper};
-
-    pub fn from_user(state: &web::Data<AppState>, user: &User) -> QueryResult<FCM> {
-        state.database.scope(|conn| {
-            FCM::belonging_to(&user)
-                .select(FCM::as_select())
-                .get_result(conn)
-        })
+    pub async fn insert_or_ignore(state: &web::Data<AppState>, user: &User) -> QueryResult<usize> {
+        insert_into(users)
+            .values(user)
+            .on_conflict_do_nothing()
+            .execute(state.get_database().await.deref_mut())
     }
 }

src/database/mod.rs

@@ -1,3 +1,3 @@
-pub mod schema;
-pub mod models;
 pub mod driver;
+pub mod models;
+pub mod schema;

src/database/models.rs

@@ -38,22 +38,25 @@ pub struct User {
     pub username: String,
 
     /// BCrypt password hash.
-    pub password: String,
+    pub password: Option<String>,
 
     /// ID of the linked VK account.
     pub vk_id: Option<i32>,
 
     /// JWT access token.
-    pub access_token: String,
+    pub access_token: Option<String>,
 
     /// Group.
-    pub group: String,
+    pub group: Option<String>,
 
     /// Role.
     pub role: UserRole,
 
     /// Version of the installed Polytechnic+ application.
-    pub version: String,
+    pub android_version: Option<String>,
+
+    /// ID of the linked Telegram account.
+    pub telegram_id: Option<i64>,
 }
 
 #[derive(

src/database/schema.rs

@@ -21,12 +21,13 @@ diesel::table! {
     users (id) {
         id -> Text,
         username -> Text,
-        password -> Text,
+        password -> Nullable<Text>,
         vk_id -> Nullable<Int4>,
-        access_token -> Text,
-        group -> Text,
+        access_token -> Nullable<Text>,
+        group -> Nullable<Text>,
         role -> UserRole,
-        version -> Text,
+        android_version -> Nullable<Text>,
+        telegram_id -> Nullable<Int8>,
     }
 }
 

src/extractors/authorized_user.rs

@@ -1,24 +1,24 @@
-use crate::app_state::AppState;
 use crate::database::driver;
-use crate::database::models::{FCM, User};
-use crate::extractors::base::{FromRequestSync, SyncExtractor};
+use crate::database::models::User;
+use crate::extractors::base::FromRequestAsync;
+use crate::state::AppState;
 use crate::utility::jwt;
-use actix_macros::ResponseErrorMessage;
+use actix_macros::MiddlewareError;
 use actix_web::body::BoxBody;
 use actix_web::dev::Payload;
 use actix_web::http::header;
-use actix_web::{FromRequest, HttpRequest, web};
+use actix_web::{web, HttpRequest};
 use derive_more::Display;
 use serde::{Deserialize, Serialize};
 use std::fmt::Debug;
 
-#[derive(Clone, Debug, Serialize, Deserialize, Display, ResponseErrorMessage)]
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Display, MiddlewareError)]
 #[status_code = "actix_web::http::StatusCode::UNAUTHORIZED"]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum Error {
-    /// There is no Authorization header in the request.
-    #[display("No Authorization header found")]
-    NoHeader,
+    /// There is no Authorization header or cookie in the request.
+    #[display("No Authorization header or cookie found")]
+    NoHeaderOrCookieFound,
 
     /// Unknown authorization type other than Bearer.
     #[display("Bearer token is required")]
@@ -39,72 +39,59 @@ impl Error {
     }
 }
 
+fn get_access_token_from_header(req: &HttpRequest) -> Result<String, Error> {
+    let header_value = req
+        .headers()
+        .get(header::AUTHORIZATION)
+        .ok_or(Error::NoHeaderOrCookieFound)?
+        .to_str()
+        .map_err(|_| Error::NoHeaderOrCookieFound)?
+        .to_string();
+
+    let parts = header_value
+        .split_once(' ')
+        .ok_or(Error::UnknownAuthorizationType)?;
+
+    if parts.0 != "Bearer" {
+        Err(Error::UnknownAuthorizationType)
+    } else {
+        Ok(parts.1.to_string())
+    }
+}
+
+fn get_access_token_from_cookies(req: &HttpRequest) -> Result<String, Error> {
+    let cookie = req
+        .cookie("access_token")
+        .ok_or(Error::NoHeaderOrCookieFound)?;
+
+    Ok(cookie.value().to_string())
+}
+
 /// User extractor from request with Bearer access token.
-impl FromRequestSync for User {
+impl FromRequestAsync for User {
     type Error = actix_web::Error;
 
-    fn from_request_sync(req: &HttpRequest, _: &mut Payload) -> Result<Self, Self::Error> {
-        let authorization = req
-            .headers()
-            .get(header::AUTHORIZATION)
-            .ok_or(Error::NoHeader.into_err())?
-            .to_str()
-            .map_err(|_| Error::NoHeader.into_err())?
-            .to_string();
+    async fn from_request_async(
+        req: &HttpRequest,
+        _payload: &mut Payload,
+    ) -> Result<Self, Self::Error> {
+        let access_token = match get_access_token_from_header(req) {
+            Err(Error::NoHeaderOrCookieFound) => {
+                get_access_token_from_cookies(req).map_err(|error| error.into_err())?
+            }
+            Err(error) => {
+                return Err(error.into_err());
+            }
+            Ok(access_token) => access_token,
+        };
 
-        let parts: Vec<&str> = authorization.split(' ').collect();
-
-        if parts.len() != 2 || parts[0] != "Bearer" {
-            return Err(Error::UnknownAuthorizationType.into_err());
-        }
-
-        let user_id = jwt::verify_and_decode(&parts[1].to_string())
+        let user_id = jwt::verify_and_decode(&access_token)
             .map_err(|_| Error::InvalidAccessToken.into_err())?;
 
         let app_state = req.app_data::<web::Data<AppState>>().unwrap();
 
-        driver::users::get(&app_state, &user_id).map_err(|_| Error::NoUser.into())
-    }
-}
-
-pub struct UserExtractor<const FCM: bool> {
-    user: User,
-
-    fcm: Option<FCM>,
-}
-
-impl<const FCM: bool> UserExtractor<{ FCM }> {
-    pub fn user(&self) -> &User {
-        &self.user
-    }
-
-    pub fn fcm(&self) -> &Option<FCM> {
-        if !FCM {
-            panic!("FCM marked as not required, but it has been requested")
-        }
-
-        &self.fcm
-    }
-}
-
-/// Extractor of user and additional parameters from request with Bearer token.
-impl<const FCM: bool> FromRequestSync for UserExtractor<{ FCM }> {
-    type Error = actix_web::Error;
-
-    fn from_request_sync(req: &HttpRequest, payload: &mut Payload) -> Result<Self, Self::Error> {
-        let user = SyncExtractor::<User>::from_request(req, payload)
-            .into_inner()?
-            .into_inner();
-
-        let app_state = req.app_data::<web::Data<AppState>>().unwrap();
-
-        Ok(Self {
-            fcm: if FCM {
-                driver::fcm::from_user(&app_state, &user).ok()
-            } else {
-                None
-            },
-            user,
-        })
+        driver::users::get(app_state, &user_id)
+            .await
+            .map_err(|_| Error::NoUser.into())
     }
 }

src/extractors/base.rs

@@ -57,18 +57,22 @@ pub trait FromRequestAsync: Sized {
     ///     web::Json(user)
     /// }
     /// ```
-    async fn from_request_async(req: HttpRequest, payload: Payload) -> Result<Self, Self::Error>;
+    async fn from_request_async(
+        req: &HttpRequest,
+        payload: &mut Payload,
+    ) -> Result<Self, Self::Error>;
 }
 
 impl<T: FromRequestAsync> FromRequest for AsyncExtractor<T> {
     type Error = T::Error;
     type Future = LocalBoxFuture<'static, Result<Self, Self::Error>>;
 
-    fn from_request(req: &HttpRequest, payload: &mut Payload) -> Self::Future {
+    fn from_request(req: &HttpRequest, _payload: &mut Payload) -> Self::Future {
         let req = req.clone();
-        let payload = payload.take();
+        let mut payload = Payload::None;
+        
         Box::pin(async move {
-            T::from_request_async(req, payload)
+            T::from_request_async(&req, &mut payload)
                 .await
                 .map(|res| Self(res))
         })
@@ -82,6 +86,7 @@ pub struct SyncExtractor<T>(T);
 
 impl<T> SyncExtractor<T> {
     /// Retrieving an object extracted with the extractor.
+    #[allow(unused)]
     pub fn into_inner(self) -> T {
         self.0
     }

src/lib.rs

@@ -1 +0,0 @@
-pub mod parser;

src/main.rs

@@ -1,21 +1,19 @@
-use crate::app_state::{AppState, app_state};
 use crate::middlewares::authorization::JWTAuthorization;
 use crate::middlewares::content_type::ContentTypeBootstrap;
+use crate::state::{new_app_state, AppState};
 use actix_web::dev::{ServiceFactory, ServiceRequest};
 use actix_web::{App, Error, HttpServer};
 use dotenvy::dotenv;
+use log::info;
 use std::io;
-use utoipa_actix_web::AppExt;
 use utoipa_actix_web::scope::Scope;
+use utoipa_actix_web::AppExt;
 use utoipa_rapidoc::RapiDoc;
 
-mod app_state;
+mod state;
 
 mod database;
 
-mod parser;
-mod xls_downloader;
-
 mod extractors;
 mod middlewares;
 mod routes;
@@ -47,17 +45,18 @@ pub fn get_api_scope<
             ignore: &["/group-names", "/teacher-names"],
         })
         .service(routes::schedule::schedule)
-        .service(routes::schedule::update_download_url)
         .service(routes::schedule::cache_status)
         .service(routes::schedule::group)
         .service(routes::schedule::group_names)
         .service(routes::schedule::teacher)
         .service(routes::schedule::teacher_names);
 
-    let fcm_scope = utoipa_actix_web::scope("/fcm")
-        .wrap(JWTAuthorization::default())
-        .service(routes::fcm::update_callback)
-        .service(routes::fcm::set_token);
+    let flow_scope = utoipa_actix_web::scope("/flow")
+        .wrap(JWTAuthorization {
+            ignore: &["/telegram-auth"],
+        })
+        .service(routes::flow::telegram_auth)
+        .service(routes::flow::telegram_complete);
 
     let vk_id_scope = utoipa_actix_web::scope("/vkid") //
         .service(routes::vk_id::oauth);
@@ -66,14 +65,14 @@ pub fn get_api_scope<
         .service(auth_scope)
         .service(users_scope)
         .service(schedule_scope)
-        .service(fcm_scope)
+        .service(flow_scope)
         .service(vk_id_scope)
 }
 
 async fn async_main() -> io::Result<()> {
-    println!("Starting server...");
+    info!("Запуск сервера...");
 
-    let app_state = app_state().await;
+    let app_state = new_app_state().await.unwrap();
 
     HttpServer::new(move || {
         let (app, api) = App::new()
@@ -112,8 +111,6 @@ fn main() -> io::Result<()> {
         },
     ));
 
-    unsafe { std::env::set_var("RUST_BACKTRACE", "1") };
-
     dotenv().unwrap();
 
     env_logger::init();

src/middlewares/authorization.rs

@@ -1,11 +1,12 @@
 use crate::database::models::User;
 use crate::extractors::authorized_user;
-use crate::extractors::base::FromRequestSync;
+use crate::extractors::base::FromRequestAsync;
 use actix_web::body::{BoxBody, EitherBody};
 use actix_web::dev::{Payload, Service, ServiceRequest, ServiceResponse, Transform, forward_ready};
 use actix_web::{Error, HttpRequest, ResponseError};
 use futures_util::future::LocalBoxFuture;
 use std::future::{Ready, ready};
+use std::rc::Rc;
 
 /// Middleware guard working with JWT tokens.
 pub struct JWTAuthorization {
@@ -21,7 +22,7 @@ impl Default for JWTAuthorization {
 
 impl<S, B> Transform<S, ServiceRequest> for JWTAuthorization
 where
-    S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error>,
+    S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error> + 'static,
     S::Future: 'static,
     B: 'static,
 {
@@ -33,14 +34,14 @@ where
 
     fn new_transform(&self, service: S) -> Self::Future {
         ready(Ok(JWTAuthorizationMiddleware {
-            service,
+            service: Rc::new(service),
             ignore: self.ignore,
         }))
     }
 }
 
 pub struct JWTAuthorizationMiddleware<S> {
-    service: S,
+    service: Rc<S>,
     /// List of ignored endpoints.
     ignore: &'static [&'static str],
 }
@@ -52,12 +53,11 @@ where
     B: 'static,
 {
     /// Checking the validity of the token.
-    fn check_authorization(
-        &self,
-        req: &HttpRequest,
-        payload: &mut Payload,
-    ) -> Result<(), authorized_user::Error> {
-        User::from_request_sync(req, payload)
+    async fn check_authorization(req: &HttpRequest) -> Result<(), authorized_user::Error> {
+        let mut payload = Payload::None;
+
+        User::from_request_async(req, &mut payload)
+            .await
             .map(|_| ())
             .map_err(|e| e.as_error::<authorized_user::Error>().unwrap().clone())
     }
@@ -79,9 +79,9 @@ where
     }
 }
 
-impl<'a, S, B> Service<ServiceRequest> for JWTAuthorizationMiddleware<S>
+impl<S, B> Service<ServiceRequest> for JWTAuthorizationMiddleware<S>
 where
-    S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error>,
+    S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error> + 'static,
     S::Future: 'static,
     B: 'static,
 {
@@ -97,20 +97,19 @@ where
             return Box::pin(async move { Ok(fut.await?.map_into_left_body()) });
         }
 
-        let (http_req, mut payload) = req.into_parts();
+        let service = Rc::clone(&self.service);
 
-        if let Err(err) = self.check_authorization(&http_req, &mut payload) {
-            return Box::pin(async move {
-                Ok(ServiceResponse::new(
-                    http_req,
+        Box::pin(async move {
+            match Self::check_authorization(req.request()).await {
+                Ok(_) => {
+                    let fut = service.call(req).await?;
+                    Ok(fut.map_into_left_body())
+                }
+                Err(err) => Ok(ServiceResponse::new(
+                    req.into_parts().0,
                     err.error_response().map_into_right_body(),
-                ))
-            });
-        }
-
-        let req = ServiceRequest::from_parts(http_req, payload);
-        let fut = self.service.call(req);
-
-        Box::pin(async move { Ok(fut.await?.map_into_left_body()) })
+                )),
+            }
+        })
     }
 }

src/middlewares/error.rs

@@ -1,15 +1,15 @@
-use std::fmt::{Write};
-use std::fmt::Display;
 use serde::{Deserialize, Serialize};
+use std::fmt::Display;
+use std::fmt::Write;
 
 /// Server response to errors within Middleware.
 #[derive(Serialize, Deserialize)]
-pub struct ResponseErrorMessage<T: Display> {
+pub struct MiddlewareError<T: Display> {
     code: T,
     message: String,
 }
 
-impl<T: Display + Serialize> ResponseErrorMessage<T> {
+impl<T: Display + Serialize> MiddlewareError<T> {
     pub fn new(code: T) -> Self {
         let mut message = String::new();
         write!(&mut message, "{}", code).unwrap();

src/middlewares/mod.rs

@@ -1,2 +1,4 @@
+pub mod error;
+
 pub mod authorization;
 pub mod content_type;

src/parser/mod.rs

@@ -1,743 +0,0 @@
-use crate::parser::LessonParseResult::{Lessons, Street};
-use crate::parser::schema::LessonType::Break;
-use crate::parser::schema::{
-    Day, ErrorCell, ErrorCellPos, Lesson, LessonSubGroup, LessonTime, LessonType, ParseError,
-    ParseResult, ScheduleEntry,
-};
-use calamine::{Reader, Xls, open_workbook_from_rs};
-use chrono::{DateTime, Duration, NaiveDateTime, Utc};
-use fuzzy_matcher::FuzzyMatcher;
-use fuzzy_matcher::skim::SkimMatcherV2;
-use regex::Regex;
-use std::collections::HashMap;
-use std::io::Cursor;
-use std::sync::LazyLock;
-
-pub mod schema;
-
-/// Data cell storing the line.
-struct InternalId {
-    /// Line index.
-    row: u32,
-
-    /// Column index.
-    column: u32,
-
-    /// Text in the cell.
-    name: String,
-}
-
-/// Data on the time of lessons from the second column of the schedule.
-struct InternalTime {
-    /// Temporary segment of the lesson.
-    time_range: LessonTime,
-
-    /// Type of lesson.
-    lesson_type: LessonType,
-
-    /// The lesson index.
-    default_index: Option<u32>,
-
-    /// The frame of the cell.
-    xls_range: ((u32, u32), (u32, u32)),
-}
-
-/// Working sheet type alias.
-type WorkSheet = calamine::Range<calamine::Data>;
-
-/// Getting a line from the required cell.
-fn get_string_from_cell(worksheet: &WorkSheet, row: u32, col: u32) -> Option<String> {
-    let cell_data = if let Some(data) = worksheet.get((row as usize, col as usize)) {
-        data.to_string()
-    } else {
-        return None;
-    };
-
-    if cell_data.trim().is_empty() {
-        return None;
-    }
-
-    static NL_RE: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"[\n\r]+").unwrap());
-    static SP_RE: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"\s+").unwrap());
-
-    let trimmed_data = SP_RE
-        .replace_all(&NL_RE.replace_all(&cell_data, " "), " ")
-        .trim()
-        .to_string();
-
-    if trimmed_data.is_empty() {
-        None
-    } else {
-        Some(trimmed_data)
-    }
-}
-
-/// Obtaining the boundaries of the cell along its upper left coordinate.
-fn get_merge_from_start(worksheet: &WorkSheet, row: u32, column: u32) -> ((u32, u32), (u32, u32)) {
-    let worksheet_end = worksheet.end().unwrap();
-
-    let row_end: u32 = {
-        let mut r: u32 = 0;
-
-        for _r in (row + 1)..worksheet_end.0 {
-            r = _r;
-
-            if let Some(_) = worksheet.get((_r as usize, column as usize)) {
-                break;
-            }
-        }
-
-        r
-    };
-
-    let column_end: u32 = {
-        let mut c: u32 = 0;
-
-        for _c in (column + 1)..worksheet_end.1 {
-            c = _c;
-
-            if let Some(_) = worksheet.get((row as usize, _c as usize)) {
-                break;
-            }
-        }
-
-        c
-    };
-
-    ((row, column), (row_end, column_end))
-}
-
-/// Obtaining a "skeleton" schedule from the working sheet.
-fn parse_skeleton(worksheet: &WorkSheet) -> Result<(Vec<InternalId>, Vec<InternalId>), ParseError> {
-    let range = &worksheet;
-
-    let mut is_parsed = false;
-
-    let mut groups: Vec<InternalId> = Vec::new();
-    let mut days: Vec<InternalId> = Vec::new();
-
-    let start = range.start().ok_or(ParseError::UnknownWorkSheetRange)?;
-    let end = range.end().ok_or(ParseError::UnknownWorkSheetRange)?;
-
-    let mut row = start.0;
-    while row < end.0 {
-        row += 1;
-
-        let day_name_opt = get_string_from_cell(&worksheet, row, 0);
-        if day_name_opt.is_none() {
-            continue;
-        }
-
-        let day_name = day_name_opt.unwrap();
-
-        if !is_parsed {
-            is_parsed = true;
-
-            row -= 1;
-
-            for column in (start.1 + 2)..=end.1 {
-                let group_name = get_string_from_cell(&worksheet, row, column);
-                if group_name.is_none() {
-                    continue;
-                }
-
-                groups.push(InternalId {
-                    row,
-                    column,
-                    name: group_name.unwrap(),
-                });
-            }
-
-            row += 1;
-        }
-
-        days.push(InternalId {
-            row,
-            column: 0,
-            name: day_name.clone(),
-        });
-
-        if days.len() > 2 && day_name.starts_with("Суббота") {
-            break;
-        }
-    }
-
-    Ok((days, groups))
-}
-
-/// The result of obtaining a lesson from the cell.
-enum LessonParseResult {
-    /// List of lessons long from one to two.
-    ///
-    /// The number of lessons will be equal to one if the couple is the first in the day,
-    /// otherwise the list from the change template and the lesson itself will be returned.
-    Lessons(Vec<Lesson>),
-
-    /// Street on which the Polytechnic Corps is located.
-    Street(String),
-}
-
-trait StringInnerSlice {
-    /// Obtaining a line from the line on the initial and final index.
-    fn inner_slice(&self, from: usize, to: usize) -> Self;
-}
-
-impl StringInnerSlice for String {
-    fn inner_slice(&self, from: usize, to: usize) -> Self {
-        self.chars()
-            .take(from)
-            .chain(self.chars().skip(to))
-            .collect()
-    }
-}
-
-// noinspection GrazieInspection
-/// Obtaining a non-standard type of lesson by name.
-fn guess_lesson_type(name: &String) -> Option<(String, LessonType)> {
-    let map: HashMap<String, LessonType> = HashMap::from([
-        ("(консультация)".to_string(), LessonType::Consultation),
-        (
-            "самостоятельная работа".to_string(),
-            LessonType::IndependentWork,
-        ),
-        ("зачет".to_string(), LessonType::Exam),
-        ("зачет с оценкой".to_string(), LessonType::ExamWithGrade),
-        ("экзамен".to_string(), LessonType::ExamDefault),
-    ]);
-
-    let matcher = SkimMatcherV2::default();
-    let name_lower = name.to_lowercase();
-
-    type SearchResult<'a> = (&'a LessonType, i64, Vec<usize>);
-
-    let mut search_results: Vec<SearchResult> = map
-        .iter()
-        .map(|entry| -> SearchResult {
-            if let Some((score, indices)) = matcher.fuzzy_indices(&*name_lower, entry.0) {
-                return (entry.1, score, indices);
-            }
-
-            (entry.1, 0, Vec::new())
-        })
-        .collect();
-    search_results.sort_by(|a, b| b.1.cmp(&a.1));
-
-    let guessed_type = search_results.first().unwrap();
-
-    if guessed_type.1 > 80 {
-        Some((
-            name.inner_slice(guessed_type.2[0], guessed_type.2[guessed_type.2.len() - 1]),
-            guessed_type.0.clone(),
-        ))
-    } else {
-        None
-    }
-}
-
-/// Getting a pair or street from a cell.
-fn parse_lesson(
-    worksheet: &WorkSheet,
-    day: &mut Day,
-    day_times: &Vec<InternalTime>,
-    time: &InternalTime,
-    column: u32,
-) -> Result<LessonParseResult, ParseError> {
-    let row = time.xls_range.0.0;
-
-    let (name, lesson_type) = {
-        let raw_name_opt = get_string_from_cell(&worksheet, row, column);
-        if raw_name_opt.is_none() {
-            return Ok(Lessons(Vec::new()));
-        }
-
-        let raw_name = raw_name_opt.unwrap();
-
-        static OTHER_STREET_RE: LazyLock<Regex> =
-            LazyLock::new(|| Regex::new(r"^[А-Я][а-я]+,?\s?[0-9]+$").unwrap());
-
-        if OTHER_STREET_RE.is_match(&raw_name) {
-            return Ok(Street(raw_name));
-        }
-
-        if let Some(guess) = guess_lesson_type(&raw_name) {
-            guess
-        } else {
-            (raw_name, time.lesson_type.clone())
-        }
-    };
-
-    let (default_range, lesson_time) = || -> Result<(Option<[u8; 2]>, LessonTime), ParseError> {
-        // check if multi-lesson
-        let cell_range = get_merge_from_start(worksheet, row, column);
-
-        let end_time_arr = day_times
-            .iter()
-            .filter(|time| time.xls_range.1.0 == cell_range.1.0)
-            .collect::<Vec<&InternalTime>>();
-
-        let end_time = end_time_arr
-            .first()
-            .ok_or(ParseError::LessonTimeNotFound(ErrorCellPos { row, column }))?;
-
-        let range: Option<[u8; 2]> = if time.default_index != None {
-            let default = time.default_index.unwrap() as u8;
-            Some([default, end_time.default_index.unwrap() as u8])
-        } else {
-            None
-        };
-
-        let time = LessonTime {
-            start: time.time_range.start,
-            end: end_time.time_range.end,
-        };
-
-        Ok((range, time))
-    }()?;
-
-    let (name, mut subgroups) = parse_name_and_subgroups(&name)?;
-
-    {
-        let cabinets: Vec<String> = parse_cabinets(worksheet, row, column + 1);
-
-        // Если количество кабинетов равно 1, назначаем этот кабинет всем подгруппам
-        if cabinets.len() == 1 {
-            for subgroup in &mut subgroups {
-                subgroup.cabinet = Some(cabinets.get(0).or(Some(&String::new())).unwrap().clone())
-            }
-        }
-        // Если количество кабинетов совпадает с количеством подгрупп, назначаем кабинеты по порядку
-        else if cabinets.len() == subgroups.len() {
-            for subgroup in &mut subgroups {
-                subgroup.cabinet = Some(
-                    cabinets
-                        .get((subgroup.number - 1) as usize)
-                        .unwrap()
-                        .clone(),
-                );
-            }
-        }
-        // Если количество кабинетов больше количества подгрупп, делаем ещё одну подгруппу.
-        else if cabinets.len() > subgroups.len() {
-            for index in 0..subgroups.len() {
-                subgroups[index].cabinet = Some(cabinets[index].clone());
-            }
-
-            while cabinets.len() > subgroups.len() {
-                subgroups.push(LessonSubGroup {
-                    number: (subgroups.len() + 1) as u8,
-                    cabinet: Some(cabinets[subgroups.len()].clone()),
-                    teacher: "Ошибка в расписании".to_string(),
-                });
-            }
-        }
-        // Если кабинетов нет, но есть подгруппы, назначаем им значение "??"
-        else {
-            for subgroup in &mut subgroups {
-                subgroup.cabinet = Some("??".to_string());
-            }
-        }
-
-        cabinets
-    };
-
-    let lesson = Lesson {
-        lesson_type,
-        default_range,
-        name: Some(name),
-        time: lesson_time,
-        subgroups: Some(subgroups),
-        group: None,
-    };
-
-    let prev_lesson = if day.lessons.len() == 0 {
-        return Ok(Lessons(Vec::from([lesson])));
-    } else {
-        &day.lessons[day.lessons.len() - 1]
-    };
-
-    Ok(Lessons(Vec::from([
-        Lesson {
-            lesson_type: Break,
-            default_range: None,
-            name: None,
-            time: LessonTime {
-                start: prev_lesson.time.end,
-                end: lesson.time.start,
-            },
-            subgroups: Some(Vec::new()),
-            group: None,
-        },
-        lesson,
-    ])))
-}
-
-/// Obtaining a list of cabinets to the right of the lesson cell.
-fn parse_cabinets(worksheet: &WorkSheet, row: u32, column: u32) -> Vec<String> {
-    let mut cabinets: Vec<String> = Vec::new();
-
-    if let Some(raw) = get_string_from_cell(&worksheet, row, column) {
-        let clean = raw.replace("\n", " ");
-        let parts: Vec<&str> = clean.split(" ").collect();
-
-        for part in parts {
-            let clean_part = part.to_string().trim().to_string();
-
-            cabinets.push(clean_part);
-        }
-    }
-
-    cabinets
-}
-
-/// Getting the "pure" name of the lesson and list of teachers from the text of the lesson cell.
-fn parse_name_and_subgroups(name: &String) -> Result<(String, Vec<LessonSubGroup>), ParseError> {
-    static LESSON_RE: LazyLock<Regex> =
-        LazyLock::new(|| Regex::new(r"(?:[А-Я][а-я]+[А-Я]{2}(?:\([0-9][а-я]+\))?)+$").unwrap());
-    static TEACHER_RE: LazyLock<Regex> =
-        LazyLock::new(|| Regex::new(r"([А-Я][а-я]+)([А-Я])([А-Я])(?:\(([0-9])[а-я]+\))?").unwrap());
-    static CLEAN_RE: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"[\s.,]+").unwrap());
-    static END_CLEAN_RE: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"[.\s]+$").unwrap());
-
-    let (teachers, lesson_name) = {
-        let clean_name = CLEAN_RE.replace_all(&name, "").to_string();
-
-        if let Some(captures) = LESSON_RE.captures(&clean_name) {
-            let capture = captures.get(0).unwrap();
-            let capture_str = capture.as_str().to_string();
-            let capture_name: String = capture_str.chars().take(5).collect();
-
-            (
-                END_CLEAN_RE.replace(&capture_str, "").to_string(),
-                END_CLEAN_RE
-                    .replace(&name[0..name.find(&*capture_name).unwrap()], "")
-                    .to_string(),
-            )
-        } else {
-            return Ok((END_CLEAN_RE.replace(&name, "").to_string(), Vec::new()));
-        }
-    };
-
-    let mut subgroups: Vec<LessonSubGroup> = Vec::new();
-
-    let teacher_it = TEACHER_RE.captures_iter(&teachers);
-
-    for captures in teacher_it {
-        subgroups.push(LessonSubGroup {
-            number: match captures.get(4) {
-                Some(capture) => capture.as_str().to_string().parse::<u8>().unwrap(),
-                None => 0,
-            },
-            cabinet: None,
-            teacher: format!(
-                "{} {}.{}.",
-                captures.get(1).unwrap().as_str().to_string(),
-                captures.get(2).unwrap().as_str().to_string(),
-                captures.get(3).unwrap().as_str().to_string()
-            ),
-        });
-    }
-
-    // фикс, если у кого-то отсутствует индекс подгруппы
-
-    if subgroups.len() == 1 {
-        let index = subgroups[0].number;
-
-        if index == 0 {
-            subgroups[0].number = 1u8;
-        } else {
-            subgroups.push(LessonSubGroup {
-                number: if index == 1 { 2 } else { 1 },
-                cabinet: None,
-                teacher: "Только у другой".to_string(),
-            });
-        }
-    } else if subgroups.len() == 2 {
-        // если индексы отсутствуют у обоих, ставим поочерёдно
-        if subgroups[0].number == 0 && subgroups[1].number == 0 {
-            subgroups[0].number = 1;
-            subgroups[1].number = 2;
-        }
-        // если индекс отсутствует у первого, ставим 2, если у второго индекс 1 и наоборот
-        else if subgroups[0].number == 0 {
-            subgroups[0].number = if subgroups[1].number == 1 { 2 } else { 1 };
-        }
-        // если индекс отсутствует у второго, ставим 2, если у первого индекс 1 и наоборот
-        else if subgroups[1].number == 0 {
-            subgroups[1].number = if subgroups[0].number == 1 { 2 } else { 1 };
-        }
-    }
-
-    if subgroups.len() == 2 && subgroups[0].number == 2 && subgroups[1].number == 1 {
-        subgroups.reverse()
-    }
-
-    Ok((lesson_name, subgroups))
-}
-
-/// Conversion of the list of couples of groups in the list of lessons of teachers.
-fn convert_groups_to_teachers(
-    groups: &HashMap<String, ScheduleEntry>,
-) -> HashMap<String, ScheduleEntry> {
-    let mut teachers: HashMap<String, ScheduleEntry> = HashMap::new();
-
-    let empty_days: Vec<Day> = groups
-        .values()
-        .next()
-        .unwrap()
-        .days
-        .iter()
-        .map(|day| Day {
-            name: day.name.clone(),
-            street: day.street.clone(),
-            date: day.date.clone(),
-            lessons: vec![],
-        })
-        .collect();
-
-    for group in groups.values() {
-        for (index, day) in group.days.iter().enumerate() {
-            for group_lesson in &day.lessons {
-                if group_lesson.lesson_type == Break {
-                    continue;
-                }
-
-                if group_lesson.subgroups.is_none() {
-                    continue;
-                }
-
-                let subgroups = group_lesson.subgroups.as_ref().unwrap();
-
-                for subgroup in subgroups {
-                    if subgroup.teacher == "Ошибка в расписании" {
-                        continue;
-                    }
-
-                    if !teachers.contains_key(&subgroup.teacher) {
-                        teachers.insert(
-                            subgroup.teacher.clone(),
-                            ScheduleEntry {
-                                name: subgroup.teacher.clone(),
-                                days: empty_days.to_vec(),
-                            },
-                        );
-                    }
-
-                    let teacher_day = teachers
-                        .get_mut(&subgroup.teacher)
-                        .unwrap()
-                        .days
-                        .get_mut(index)
-                        .unwrap();
-
-                    teacher_day.lessons.push({
-                        let mut lesson = group_lesson.clone();
-                        lesson.group = Some(group.name.clone());
-
-                        lesson
-                    });
-                }
-            }
-        }
-    }
-
-    teachers.iter_mut().for_each(|(_, teacher)| {
-        teacher.days.iter_mut().for_each(|day| {
-            day.lessons.sort_by(|a, b| {
-                a.default_range.as_ref().unwrap()[1].cmp(&b.default_range.as_ref().unwrap()[1])
-            })
-        })
-    });
-
-    teachers
-}
-
-/// Reading XLS Document from the buffer and converting it into the schedule ready to use.
-///
-/// # Arguments
-///
-/// * `buffer`: XLS data containing schedule.
-///
-/// returns: Result<ParseResult, ParseError>
-///
-/// # Examples
-///
-/// ```
-/// use schedule_parser_rusted::parser::parse_xls;
-///
-/// let result = parse_xls(&include_bytes!("../../schedule.xls").to_vec());
-///
-/// assert!(result.is_ok());
-///
-/// assert_ne!(result.as_ref().unwrap().groups.len(), 0);
-/// assert_ne!(result.as_ref().unwrap().teachers.len(), 0);
-/// ```
-pub fn parse_xls(buffer: &Vec<u8>) -> Result<ParseResult, ParseError> {
-    let cursor = Cursor::new(&buffer);
-    let mut workbook: Xls<_> =
-        open_workbook_from_rs(cursor).map_err(|e| ParseError::BadXLS(std::sync::Arc::new(e)))?;
-
-    let worksheet: WorkSheet = workbook
-        .worksheets()
-        .first()
-        .ok_or(ParseError::NoWorkSheets)?
-        .1
-        .to_owned();
-
-    let (days_markup, groups_markup) = parse_skeleton(&worksheet)?;
-
-    let mut groups: HashMap<String, ScheduleEntry> = HashMap::new();
-    let mut days_times: Vec<Vec<InternalTime>> = Vec::new();
-
-    let saturday_end_row = worksheet.end().unwrap().0;
-
-    for group_markup in groups_markup {
-        let mut group = ScheduleEntry {
-            name: group_markup.name,
-            days: Vec::new(),
-        };
-
-        for day_index in 0..(&days_markup).len() {
-            let day_markup = &days_markup[day_index];
-
-            let mut day = {
-                let space_index = day_markup.name.find(' ').unwrap();
-
-                let name = day_markup.name[..space_index].to_string();
-
-                let date_raw = day_markup.name[space_index + 1..].to_string();
-                let date_add = format!("{} 00:00:00", date_raw);
-
-                let date = NaiveDateTime::parse_from_str(&*date_add, "%d.%m.%Y %H:%M:%S");
-
-                Day {
-                    name,
-                    street: None,
-                    date: date.unwrap().and_utc(),
-                    lessons: Vec::new(),
-                }
-            };
-
-            let lesson_time_column = days_markup[0].column + 1;
-
-            let row_distance = if day_index != days_markup.len() - 1 {
-                days_markup[day_index + 1].row
-            } else {
-                saturday_end_row
-            } - day_markup.row;
-
-            if days_times.len() != 6 {
-                let mut day_times: Vec<InternalTime> = Vec::new();
-
-                for row in day_markup.row..(day_markup.row + row_distance) {
-                    // time
-                    let time_opt = get_string_from_cell(&worksheet, row, lesson_time_column);
-                    if time_opt.is_none() {
-                        continue;
-                    }
-
-                    let time = time_opt.unwrap();
-
-                    // type
-                    let lesson_type = if time.contains("пара") {
-                        LessonType::Default
-                    } else {
-                        LessonType::Additional
-                    };
-
-                    // lesson index
-                    let default_index = if lesson_type == LessonType::Default {
-                        Some(
-                            time.chars()
-                                .next()
-                                .unwrap()
-                                .to_string()
-                                .parse::<u32>()
-                                .unwrap(),
-                        )
-                    } else {
-                        None
-                    };
-
-                    // time
-                    let time_range = {
-                        static TIME_RE: LazyLock<Regex> =
-                            LazyLock::new(|| Regex::new(r"(\d+\.\d+)-(\d+\.\d+)").unwrap());
-
-                        let parse_res = TIME_RE.captures(&time).ok_or(ParseError::GlobalTime(
-                            ErrorCell::new(row, lesson_time_column, time.clone()),
-                        ))?;
-
-                        let start_match = parse_res.get(1).unwrap().as_str();
-                        let start_parts: Vec<&str> = start_match.split(".").collect();
-
-                        let end_match = parse_res.get(2).unwrap().as_str();
-                        let end_parts: Vec<&str> = end_match.split(".").collect();
-
-                        static GET_TIME: fn(DateTime<Utc>, &Vec<&str>) -> DateTime<Utc> =
-                            |date, parts| {
-                                date + Duration::hours(parts[0].parse::<i64>().unwrap() - 4)
-                                    + Duration::minutes(parts[1].parse::<i64>().unwrap())
-                            };
-
-                        LessonTime {
-                            start: GET_TIME(day.date.clone(), &start_parts),
-                            end: GET_TIME(day.date.clone(), &end_parts),
-                        }
-                    };
-
-                    day_times.push(InternalTime {
-                        time_range,
-                        lesson_type,
-                        default_index,
-                        xls_range: get_merge_from_start(&worksheet, row, lesson_time_column),
-                    });
-                }
-
-                days_times.push(day_times);
-            }
-
-            let day_times = &days_times[day_index];
-
-            for time in day_times {
-                match &mut parse_lesson(
-                    &worksheet,
-                    &mut day,
-                    &day_times,
-                    &time,
-                    group_markup.column,
-                )? {
-                    Lessons(l) => day.lessons.append(l),
-                    Street(s) => day.street = Some(s.to_owned()),
-                }
-            }
-
-            group.days.push(day);
-        }
-
-        groups.insert(group.name.clone(), group);
-    }
-
-    Ok(ParseResult {
-        teachers: convert_groups_to_teachers(&groups),
-        groups,
-    })
-}
-
-#[cfg(test)]
-pub mod tests {
-    use super::*;
-
-    pub fn test_result() -> Result<ParseResult, ParseError> {
-        parse_xls(&include_bytes!("../../schedule.xls").to_vec())
-    }
-
-    #[test]
-    fn read() {
-        let result = test_result();
-
-        assert!(result.is_ok());
-
-        assert_ne!(result.as_ref().unwrap().groups.len(), 0);
-        assert_ne!(result.as_ref().unwrap().teachers.len(), 0);
-    }
-}

src/parser/schema.rs

@@ -1,180 +0,0 @@
-use chrono::{DateTime, Utc};
-use derive_more::{Display, Error};
-use serde::{Deserialize, Serialize, Serializer};
-use serde_repr::{Deserialize_repr, Serialize_repr};
-use std::collections::HashMap;
-use std::sync::Arc;
-use utoipa::ToSchema;
-
-/// The beginning and end of the lesson.
-#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
-pub struct LessonTime {
-    /// The beginning of a lesson.
-    pub start: DateTime<Utc>,
-
-    /// The end of the lesson.
-    pub end: DateTime<Utc>,
-}
-
-/// Type of lesson.
-#[derive(Clone, Hash, PartialEq, Debug, Serialize_repr, Deserialize_repr, ToSchema)]
-#[serde(rename_all = "SCREAMING_SNAKE_CASE")]
-#[repr(u8)]
-pub enum LessonType {
-    /// Обычная.
-    Default = 0,
-
-    /// Допы.
-    Additional,
-
-    /// Перемена.
-    Break,
-
-    /// Консультация.
-    Consultation,
-
-    /// Самостоятельная работа.
-    IndependentWork,
-
-    /// Зачёт.
-    Exam,
-
-    /// Зачёт с оценкой.
-    ExamWithGrade,
-
-    /// Экзамен.
-    ExamDefault,
-}
-
-#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
-pub struct LessonSubGroup {
-    /// Index of subgroup.
-    pub number: u8,
-
-    /// Cabinet, if present.
-    pub cabinet: Option<String>,
-
-    /// Full name of the teacher.
-    pub teacher: String,
-}
-
-#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
-#[serde(rename_all = "camelCase")]
-pub struct Lesson {
-    /// Type.
-    #[serde(rename = "type")]
-    pub lesson_type: LessonType,
-
-    /// Lesson indexes, if present.
-    pub default_range: Option<[u8; 2]>,
-
-    /// Name.
-    pub name: Option<String>,
-
-    /// The beginning and end.
-    pub time: LessonTime,
-
-    /// List of subgroups.
-    #[serde(rename = "subGroups")]
-    pub subgroups: Option<Vec<LessonSubGroup>>,
-
-    /// Group name, if this is a schedule for teachers.
-    pub group: Option<String>,
-}
-
-#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
-pub struct Day {
-    /// Day of the week.
-    pub name: String,
-
-    /// Address of another corps.
-    pub street: Option<String>,
-
-    /// Date.
-    pub date: DateTime<Utc>,
-
-    /// List of lessons on this day.
-    pub lessons: Vec<Lesson>,
-}
-
-#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
-pub struct ScheduleEntry {
-    /// The name of the group or name of the teacher.
-    pub name: String,
-
-    /// List of six days.
-    pub days: Vec<Day>,
-}
-
-#[derive(Clone)]
-pub struct ParseResult {
-    /// List of groups.
-    pub groups: HashMap<String, ScheduleEntry>,
-
-    /// List of teachers.
-    pub teachers: HashMap<String, ScheduleEntry>,
-}
-
-#[derive(Clone, Debug, Display, Error, ToSchema)]
-#[display("row {row}, column {column}")]
-pub struct ErrorCellPos {
-    pub row: u32,
-    pub column: u32,
-}
-
-#[derive(Clone, Debug, Display, Error, ToSchema)]
-#[display("'{data}' at {pos}")]
-pub struct ErrorCell {
-    pub pos: ErrorCellPos,
-    pub data: String,
-}
-
-impl ErrorCell {
-    pub fn new(row: u32, column: u32, data: String) -> Self {
-        Self {
-            pos: ErrorCellPos { row, column },
-            data,
-        }
-    }
-}
-
-#[derive(Clone, Debug, Display, Error, ToSchema)]
-pub enum ParseError {
-    /// Errors related to reading XLS file.
-    #[display("{_0:?}: Failed to read XLS file.")]
-    #[schema(value_type = String)]
-    BadXLS(Arc<calamine::XlsError>),
-
-    /// Not a single sheet was found.
-    #[display("No work sheets found.")]
-    NoWorkSheets,
-
-    /// There are no data on the boundaries of the sheet.
-    #[display("There is no data on work sheet boundaries.")]
-    UnknownWorkSheetRange,
-
-    /// Failed to read the beginning and end of the lesson from the line
-    #[display("Failed to read lesson start and end times from {_0}.")]
-    GlobalTime(ErrorCell),
-
-    /// Not found the beginning and the end corresponding to the lesson.
-    #[display("No start and end times matching the lesson (at {_0}) was found.")]
-    LessonTimeNotFound(ErrorCellPos),
-}
-
-impl Serialize for ParseError {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: Serializer,
-    {
-        match self {
-            ParseError::BadXLS(_) => serializer.serialize_str("BAD_XLS"),
-            ParseError::NoWorkSheets => serializer.serialize_str("NO_WORK_SHEETS"),
-            ParseError::UnknownWorkSheetRange => {
-                serializer.serialize_str("UNKNOWN_WORK_SHEET_RANGE")
-            }
-            ParseError::GlobalTime(_) => serializer.serialize_str("GLOBAL_TIME"),
-            ParseError::LessonTimeNotFound(_) => serializer.serialize_str("LESSON_TIME_NOT_FOUND"),
-        }
-    }
-}

src/routes/auth/mod.rs

@@ -1,6 +1,6 @@
+mod shared;
 mod sign_in;
 mod sign_up;
-mod shared;
 
 pub use sign_in::*;
 pub use sign_up::*;

src/routes/auth/shared.rs

@@ -1,9 +1,6 @@
-use crate::utility::jwt::DEFAULT_ALGORITHM;
 use jsonwebtoken::errors::ErrorKind;
-use jsonwebtoken::{decode, DecodingKey, Validation};
+use jsonwebtoken::{Algorithm, DecodingKey, Validation, decode};
 use serde::{Deserialize, Serialize};
-use std::env;
-use std::sync::LazyLock;
 
 #[derive(Deserialize, Serialize)]
 struct TokenData {
@@ -17,7 +14,7 @@ struct TokenData {
 
 #[derive(Debug, Serialize, Deserialize)]
 struct Claims {
-    sub: String,
+    sub: i32,
     iis: String,
     jti: i32,
     app: i32,
@@ -52,17 +49,10 @@ const VK_PUBLIC_KEY: &str = concat!(
     "-----END PUBLIC KEY-----"
 );
 
-static VK_ID_CLIENT_ID: LazyLock<i32> = LazyLock::new(|| {
-    env::var("VK_ID_CLIENT_ID")
-        .expect("VK_ID_CLIENT_ID must be set")
-        .parse::<i32>()
-        .expect("VK_ID_CLIENT_ID must be i32")
-});
-
-pub fn parse_vk_id(token_str: &String) -> Result<i32, Error> {
+pub fn parse_vk_id(token_str: &String, client_id: i32) -> Result<i32, Error> {
     let dkey = DecodingKey::from_rsa_pem(VK_PUBLIC_KEY.as_bytes()).unwrap();
 
-    match decode::<Claims>(&token_str, &dkey, &Validation::new(DEFAULT_ALGORITHM)) {
+    match decode::<Claims>(&token_str, &dkey, &Validation::new(Algorithm::RS256)) {
         Ok(token_data) => {
             let claims = token_data.claims;
 
@@ -70,13 +60,10 @@ pub fn parse_vk_id(token_str: &String) -> Result<i32, Error> {
                 Err(Error::UnknownIssuer(claims.iis))
             } else if claims.jti != 21 {
                 Err(Error::UnknownType(claims.jti))
-            } else if claims.app != *VK_ID_CLIENT_ID {
+            } else if claims.app != client_id {
                 Err(Error::UnknownClientId(claims.app))
             } else {
-                match claims.sub.parse::<i32>() {
-                    Ok(sub) => Ok(sub),
-                    Err(_) => Err(Error::InvalidToken),
-                }
+                Ok(claims.sub)
             }
         }
         Err(err) => Err(match err.into_kind() {

src/routes/auth/sign_in.rs

@@ -1,14 +1,12 @@
 use self::schema::*;
 use crate::database::driver;
-use crate::database::models::User;
+use crate::database::driver::users::UserSave;
 use crate::routes::auth::shared::parse_vk_id;
-use crate::routes::auth::sign_in::schema::SignInData::{Default, Vk};
+use crate::routes::auth::sign_in::schema::SignInData::{Default, VkOAuth};
+use crate::routes::schema::ResponseError;
 use crate::routes::schema::user::UserResponse;
-use crate::routes::schema::{IntoResponseAsError, ResponseError};
-use crate::utility::mutex::MutexScope;
 use crate::{AppState, utility};
 use actix_web::{post, web};
-use diesel::SaveChangesDsl;
 use web::Json;
 
 async fn sign_in_combined(
@@ -16,14 +14,18 @@ async fn sign_in_combined(
     app_state: &web::Data<AppState>,
 ) -> Result<UserResponse, ErrorCode> {
     let user = match &data {
-        Default(data) => driver::users::get_by_username(&app_state, &data.username),
-        Vk(id) => driver::users::get_by_vk_id(&app_state, *id),
+        Default(data) => driver::users::get_by_username(&app_state, &data.username).await,
+        VkOAuth(id) => driver::users::get_by_vk_id(&app_state, *id).await,
     };
 
     match user {
         Ok(mut user) => {
             if let Default(data) = data {
-                match bcrypt::verify(&data.password, &user.password) {
+                if user.password.is_none() {
+                    return Err(ErrorCode::IncorrectCredentials);
+                }
+
+                match bcrypt::verify(&data.password, &user.password.as_ref().unwrap()) {
                     Ok(result) => {
                         if !result {
                             return Err(ErrorCode::IncorrectCredentials);
@@ -35,12 +37,9 @@ async fn sign_in_combined(
                 }
             }
 
-            user.access_token = utility::jwt::encode(&user.id);
+            user.access_token = Some(utility::jwt::encode(&user.id));
 
-            app_state.database.scope(|conn| {
-                user.save_changes::<User>(conn)
-                    .expect("Failed to update user")
-            });
+            user.save(&app_state).await.expect("Failed to update user");
 
             Ok(user.into())
         }
@@ -71,15 +70,17 @@ pub async fn sign_in_vk(
 ) -> ServiceResponse {
     let data = data_json.into_inner();
 
-    match parse_vk_id(&data.access_token) {
-        Ok(id) => sign_in_combined(Vk(id), &app_state).await.into(),
-        Err(_) => ErrorCode::InvalidVkAccessToken.into_response(),
+    match parse_vk_id(&data.access_token, app_state.get_env().vk_id.client_id) {
+        Ok(id) => sign_in_combined(VkOAuth(id), &app_state).await,
+        Err(_) => Err(ErrorCode::InvalidVkAccessToken),
     }
+    .into()
 }
 
 mod schema {
     use crate::routes::schema::user::UserResponse;
-    use actix_macros::{IntoResponseError, StatusCode};
+    use actix_macros::ErrResponse;
+    use derive_more::Display;
     use serde::{Deserialize, Serialize};
     use utoipa::ToSchema;
 
@@ -109,15 +110,17 @@ mod schema {
 
     pub type ServiceResponse = crate::routes::schema::Response<UserResponse, ErrorCode>;
 
-    #[derive(Serialize, ToSchema, Clone, IntoResponseError, StatusCode)]
-    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
     #[schema(as = SignIn::ErrorCode)]
+    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
     #[status_code = "actix_web::http::StatusCode::NOT_ACCEPTABLE"]
     pub enum ErrorCode {
         /// Incorrect username or password.
+        #[display("Incorrect username or password.")]
         IncorrectCredentials,
 
         /// Invalid VK ID token.
+        #[display("Invalid VK ID token.")]
         InvalidVkAccessToken,
     }
 
@@ -129,7 +132,7 @@ mod schema {
         Default(Request),
 
         /// Identifier of the attached account VK.
-        Vk(i32),
+        VkOAuth(i32),
     }
 }
 
@@ -184,14 +187,16 @@ mod tests {
             &User {
                 id: id.clone(),
                 username,
-                password: bcrypt::hash("example".to_string(), bcrypt::DEFAULT_COST).unwrap(),
+                password: Some(bcrypt::hash("example".to_string(), bcrypt::DEFAULT_COST).unwrap()),
                 vk_id: None,
-                access_token: utility::jwt::encode(&id),
-                group: "ИС-214/23".to_string(),
+                telegram_id: None,
+                access_token: Some(utility::jwt::encode(&id)),
+                group: Some("ИС-214/23".to_string()),
                 role: UserRole::Student,
-                version: "1.0.0".to_string(),
+                android_version: None,
             },
         )
+        .await
         .unwrap();
     }
 

src/routes/auth/sign_up.rs

@@ -2,11 +2,10 @@ use self::schema::*;
 use crate::AppState;
 use crate::database::driver;
 use crate::database::models::UserRole;
-use crate::routes::auth::shared::{Error, parse_vk_id};
+use crate::routes::auth::shared::parse_vk_id;
+use crate::routes::schema::ResponseError;
 use crate::routes::schema::user::UserResponse;
-use crate::routes::schema::{IntoResponseAsError, ResponseError};
 use actix_web::{post, web};
-use rand::{Rng, rng};
 use web::Json;
 
 async fn sign_up_combined(
@@ -18,29 +17,31 @@ async fn sign_up_combined(
         return Err(ErrorCode::DisallowedRole);
     }
 
-    // If specified group doesn't exist in schedule.
-    let schedule_opt = app_state.schedule.lock().unwrap();
-
-    if let Some(schedule) = &*schedule_opt {
-        if !schedule.data.groups.contains_key(&data.group) {
-            return Err(ErrorCode::InvalidGroupName);
-        }
+    if !app_state
+        .get_schedule_snapshot("eng_polytechnic")
+        .await
+        .unwrap()
+        .data
+        .groups
+        .contains_key(&data.group)
+    {
+        return Err(ErrorCode::InvalidGroupName);
     }
 
     // If user with specified username already exists.
-    if driver::users::contains_by_username(&app_state, &data.username) {
+    if driver::users::contains_by_username(&app_state, &data.username).await {
         return Err(ErrorCode::UsernameAlreadyExists);
     }
 
     // If user with specified VKID already exists.
     if let Some(id) = data.vk_id {
-        if driver::users::contains_by_vk_id(&app_state, id) {
+        if driver::users::contains_by_vk_id(&app_state, id).await {
             return Err(ErrorCode::VkAlreadyExists);
         }
     }
 
     let user = data.into();
-    driver::users::insert(&app_state, &user).unwrap();
+    driver::users::insert(&app_state, &user).await.unwrap();
 
     Ok(UserResponse::from(&user)).into()
 }
@@ -56,7 +57,7 @@ pub async fn sign_up(data_json: Json<Request>, app_state: web::Data<AppState>) -
     sign_up_combined(
         SignUpData {
             username: data.username,
-            password: data.password,
+            password: Some(data.password),
             vk_id: None,
             group: data.group,
             role: data.role,
@@ -79,40 +80,32 @@ pub async fn sign_up_vk(
 ) -> ServiceResponse {
     let data = data_json.into_inner();
 
-    match parse_vk_id(&data.access_token) {
-        Ok(id) => sign_up_combined(
-            SignUpData {
-                username: data.username,
-                password: rng()
-                    .sample_iter(&rand::distr::Alphanumeric)
-                    .take(16)
-                    .map(char::from)
-                    .collect(),
-                vk_id: Some(id),
-                group: data.group,
-                role: data.role,
-                version: data.version,
-            },
-            &app_state,
-        )
-        .await
-        .into(),
-        Err(err) => {
-            if err != Error::Expired {
-                eprintln!("Failed to parse vk id token!");
-                eprintln!("{:?}", err);
-            }
-
-            ErrorCode::InvalidVkAccessToken.into_response()
+    match parse_vk_id(&data.access_token, app_state.get_env().vk_id.client_id) {
+        Ok(id) => {
+            sign_up_combined(
+                SignUpData {
+                    username: data.username,
+                    password: None,
+                    vk_id: Some(id),
+                    group: data.group,
+                    role: data.role,
+                    version: data.version,
+                },
+                &app_state,
+            )
+            .await
         }
+        Err(_) => Err(ErrorCode::InvalidVkAccessToken),
     }
+    .into()
 }
 
 mod schema {
     use crate::database::models::{User, UserRole};
     use crate::routes::schema::user::UserResponse;
     use crate::utility;
-    use actix_macros::{IntoResponseError, StatusCode};
+    use actix_macros::ErrResponse;
+    use derive_more::Display;
     use objectid::ObjectId;
     use serde::{Deserialize, Serialize};
 
@@ -170,24 +163,29 @@ mod schema {
 
     pub type ServiceResponse = crate::routes::schema::Response<UserResponse, ErrorCode>;
 
-    #[derive(Clone, Serialize, utoipa::ToSchema, IntoResponseError, StatusCode)]
+    #[derive(Clone, Serialize, Display, utoipa::ToSchema, ErrResponse)]
     #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
     #[schema(as = SignUp::ErrorCode)]
     #[status_code = "actix_web::http::StatusCode::NOT_ACCEPTABLE"]
     pub enum ErrorCode {
         /// Conveyed the role of Admin.
+        #[display("Conveyed the role of Admin.")]
         DisallowedRole,
 
         /// Unknown name of the group.
+        #[display("Unknown name of the group.")]
         InvalidGroupName,
 
         /// User with this name is already registered.
+        #[display("User with this name is already registered.")]
         UsernameAlreadyExists,
 
         /// Invalid VK ID token.
+        #[display("Invalid VK ID token.")]
         InvalidVkAccessToken,
 
         /// User with such an account VK is already registered.
+        #[display("User with such an account VK is already registered.")]
         VkAlreadyExists,
     }
 
@@ -195,13 +193,14 @@ mod schema {
 
     /// Data for registration.
     pub struct SignUpData {
+        // TODO: сделать ограничение на минимальную и максимальную длину при регистрации и смене.
         /// User name.
         pub username: String,
 
         /// Password.
         ///
         /// Should be present even if registration occurs using the VK ID token.
-        pub password: String,
+        pub password: Option<String>,
 
         /// Account identifier VK.
         pub vk_id: Option<i32>,
@@ -218,18 +217,23 @@ mod schema {
 
     impl Into<User> for SignUpData {
         fn into(self) -> User {
+            assert_ne!(self.password.is_some(), self.vk_id.is_some());
+
             let id = ObjectId::new().unwrap().to_string();
-            let access_token = utility::jwt::encode(&id);
+            let access_token = Some(utility::jwt::encode(&id));
 
             User {
                 id,
                 username: self.username,
-                password: bcrypt::hash(self.password, bcrypt::DEFAULT_COST).unwrap(),
+                password: self
+                    .password
+                    .map(|x| bcrypt::hash(x, bcrypt::DEFAULT_COST).unwrap()),
                 vk_id: self.vk_id,
+                telegram_id: None,
                 access_token,
-                group: self.group,
+                group: Some(self.group),
                 role: self.role,
-                version: self.version,
+                android_version: Some(self.version),
             }
         }
     }
@@ -248,21 +252,21 @@ mod tests {
     use actix_web::http::StatusCode;
     use actix_web::test;
 
-    struct SignUpPartial {
-        username: String,
-        group: String,
+    struct SignUpPartial<'a> {
+        username: &'a str,
+        group: &'a str,
         role: UserRole,
     }
 
-    async fn sign_up_client(data: SignUpPartial) -> ServiceResponse {
+    async fn sign_up_client(data: SignUpPartial<'_>) -> ServiceResponse {
         let app = test_app(test_app_state().await, sign_up).await;
 
         let req = test::TestRequest::with_uri("/sign-up")
             .method(Method::POST)
             .set_json(Request {
-                username: data.username.clone(),
+                username: data.username.to_string(),
                 password: "example".to_string(),
-                group: data.group.clone(),
+                group: data.group.to_string(),
                 role: data.role.clone(),
                 version: "1.0.0".to_string(),
             })
@@ -278,13 +282,13 @@ mod tests {
         test_env();
 
         let app_state = static_app_state().await;
-        driver::users::delete_by_username(&app_state, &"test::sign_up_valid".to_string());
+        driver::users::delete_by_username(&app_state, &"test::sign_up_valid".to_string()).await;
 
         // test
 
         let resp = sign_up_client(SignUpPartial {
-            username: "test::sign_up_valid".to_string(),
-            group: "ИС-214/23".to_string(),
+            username: "test::sign_up_valid",
+            group: "ИС-214/23",
             role: UserRole::Student,
         })
         .await;
@@ -299,11 +303,11 @@ mod tests {
         test_env();
 
         let app_state = static_app_state().await;
-        driver::users::delete_by_username(&app_state, &"test::sign_up_multiple".to_string());
+        driver::users::delete_by_username(&app_state, &"test::sign_up_multiple".to_string()).await;
 
         let create = sign_up_client(SignUpPartial {
-            username: "test::sign_up_multiple".to_string(),
-            group: "ИС-214/23".to_string(),
+            username: "test::sign_up_multiple",
+            group: "ИС-214/23",
             role: UserRole::Student,
         })
         .await;
@@ -311,8 +315,8 @@ mod tests {
         assert_eq!(create.status(), StatusCode::OK);
 
         let resp = sign_up_client(SignUpPartial {
-            username: "test::sign_up_multiple".to_string(),
-            group: "ИС-214/23".to_string(),
+            username: "test::sign_up_multiple",
+            group: "ИС-214/23",
             role: UserRole::Student,
         })
         .await;
@@ -326,8 +330,8 @@ mod tests {
 
         // test
         let resp = sign_up_client(SignUpPartial {
-            username: "test::sign_up_invalid_role".to_string(),
-            group: "ИС-214/23".to_string(),
+            username: "test::sign_up_invalid_role",
+            group: "ИС-214/23",
             role: UserRole::Admin,
         })
         .await;
@@ -341,8 +345,8 @@ mod tests {
 
         // test
         let resp = sign_up_client(SignUpPartial {
-            username: "test::sign_up_invalid_group".to_string(),
-            group: "invalid_group".to_string(),
+            username: "test::sign_up_invalid_group",
+            group: "invalid_group",
             role: UserRole::Student,
         })
         .await;

src/routes/fcm/mod.rs

@@ -1,5 +0,0 @@
-mod update_callback;
-mod set_token;
-
-pub use update_callback::*;
-pub use set_token::*;

src/routes/fcm/set_token.rs

@@ -1,114 +0,0 @@
-use crate::app_state::AppState;
-use crate::database;
-use crate::database::models::FCM;
-use crate::extractors::authorized_user::UserExtractor;
-use crate::extractors::base::SyncExtractor;
-use crate::utility::mutex::{MutexScope, MutexScopeAsync};
-use actix_web::{HttpResponse, Responder, patch, web};
-use diesel::{RunQueryDsl, SaveChangesDsl};
-use firebase_messaging_rs::FCMClient;
-use firebase_messaging_rs::topic::{TopicManagementError, TopicManagementSupport};
-use serde::Deserialize;
-
-#[derive(Debug, Deserialize)]
-struct Params {
-    pub token: String,
-}
-
-async fn get_fcm(
-    app_state: &web::Data<AppState>,
-    user_data: &UserExtractor<true>,
-    token: String,
-) -> Result<FCM, diesel::result::Error> {
-    match user_data.fcm() {
-        Some(fcm) => {
-            let mut fcm = fcm.clone();
-            fcm.token = token;
-
-            Ok(fcm)
-        }
-        None => {
-            let fcm = FCM {
-                user_id: user_data.user().id.clone(),
-                token,
-                topics: vec![],
-            };
-
-            match app_state.database.scope(|conn| {
-                diesel::insert_into(database::schema::fcm::table)
-                    .values(&fcm)
-                    .execute(conn)
-            }) {
-                Ok(_) => Ok(fcm),
-                Err(e) => Err(e),
-            }
-        }
-    }
-}
-
-#[utoipa::path(responses((status = OK)))]
-#[patch("/set-token")]
-pub async fn set_token(
-    app_state: web::Data<AppState>,
-    web::Query(params): web::Query<Params>,
-    user_data: SyncExtractor<UserExtractor<true>>,
-) -> impl Responder {
-    let user_data = user_data.into_inner();
-
-    // If token not changes - exit.
-    if let Some(fcm) = user_data.fcm() {
-        if fcm.token == params.token {
-            return HttpResponse::Ok();
-        }
-    }
-
-    let fcm = get_fcm(&app_state, &user_data, params.token.clone()).await;
-    if let Err(e) = fcm {
-        eprintln!("Failed to get FCM: {e}");
-        return HttpResponse::Ok();
-    }
-
-    let mut fcm = fcm.ok().unwrap();
-
-    // Add default topics.
-    if !fcm.topics.contains(&Some("common".to_string())) {
-        fcm.topics.push(Some("common".to_string()));
-    }
-
-    // Subscribe to default topics.
-    if let Some(e) = app_state
-        .fcm_client
-        .as_ref()
-        .unwrap()
-        .async_scope(
-            async |client: &mut FCMClient| -> Result<(), TopicManagementError> {
-                let mut tokens: Vec<String> = Vec::new();
-                tokens.push(fcm.token.clone());
-
-                for topic in fcm.topics.clone() {
-                    if let Some(topic) = topic {
-                        client.register_tokens_to_topic(topic.clone(), tokens.clone()).await?;
-                    }
-                }
-
-                Ok(())
-            },
-        )
-        .await
-        .err()
-    {
-        eprintln!("Failed to subscribe token to topic: {:?}", e);
-        return HttpResponse::Ok();
-    }
-
-    // Write updates to db.
-    if let Some(e) = app_state
-        .database
-        .scope(|conn| fcm.save_changes::<FCM>(conn))
-        .err()
-    {
-        eprintln!("Failed to update FCM object: {e}");
-    }
-
-    HttpResponse::Ok()
-}

src/routes/fcm/update_callback.rs

@@ -1,32 +0,0 @@
-use crate::app_state::AppState;
-use crate::database::models::User;
-use crate::extractors::base::SyncExtractor;
-use crate::utility::mutex::MutexScope;
-use actix_web::{HttpResponse, Responder, post, web};
-use diesel::SaveChangesDsl;
-
-#[utoipa::path(responses(
-    (status = OK),
-    (status = INTERNAL_SERVER_ERROR)
-))]
-#[post("/update-callback/{version}")]
-async fn update_callback(
-    app_state: web::Data<AppState>,
-    version: web::Path<String>,
-    user: SyncExtractor<User>,
-) -> impl Responder {
-    let mut user = user.into_inner();
-
-    user.version = version.into_inner();
-
-    match app_state
-        .database
-        .scope(|conn| user.save_changes::<User>(conn))
-    {
-        Ok(_) => HttpResponse::Ok(),
-        Err(e) => {
-            eprintln!("Failed to update user: {}", e);
-            HttpResponse::InternalServerError()
-        }
-    }
-}

src/routes/flow/mod.rs

@@ -0,0 +1,5 @@
+mod telegram_auth;
+mod telegram_complete;
+
+pub use telegram_auth::*;
+pub use telegram_complete::*;

src/routes/flow/telegram_auth.rs

@@ -0,0 +1,183 @@
+use self::schema::*;
+use crate::database::driver;
+use crate::database::driver::users::UserSave;
+use crate::database::models::{User, UserRole};
+use crate::routes::schema::ResponseError;
+use crate::utility::telegram::{WebAppInitDataMap, WebAppUser};
+use crate::{AppState, utility};
+use actix_web::{post, web};
+use chrono::{DateTime, Duration, Utc};
+use objectid::ObjectId;
+use std::sync::Arc;
+use web::Json;
+
+#[utoipa::path(responses(
+    (status = OK, body = Response),
+    (status = UNAUTHORIZED, body = ResponseError<ErrorCode>),
+))]
+#[post("/telegram-auth")]
+pub async fn telegram_auth(
+    data_json: Json<Request>,
+    app_state: web::Data<AppState>,
+) -> ServiceResponse {
+    let init_data = WebAppInitDataMap::from_str(data_json.into_inner().init_data);
+
+    // for (key, value) in &init_data.data_map {
+    //     println!("key: {} | value: {}", key, value);
+    // }
+
+    {
+        let env = &app_state.get_env().telegram;
+
+        if let Err(error) = init_data.verify(env.bot_id, env.test_dc) {
+            return Err(ErrorCode::InvalidInitData(Arc::new(error))).into();
+        }
+    }
+
+    let auth_date = DateTime::<Utc>::from_timestamp(
+        init_data
+            .data_map
+            .get("auth_date")
+            .unwrap()
+            .parse()
+            .unwrap(),
+        0,
+    )
+    .unwrap();
+
+    if Utc::now() - auth_date > Duration::minutes(5) {
+        return Err(ErrorCode::ExpiredInitData).into();
+    }
+
+    let web_app_user =
+        serde_json::from_str::<WebAppUser>(init_data.data_map.get("user").unwrap()).unwrap();
+
+    let mut user = {
+        match driver::users::get_by_telegram_id(&app_state, web_app_user.id).await {
+            Ok(value) => Ok(value),
+            Err(_) => {
+                let new_user = User {
+                    id: ObjectId::new().unwrap().to_string(),
+                    username: format!("telegram_{}", web_app_user.id), // можно оставить, а можно поменять
+                    password: None,                                    // ибо нехуй
+                    vk_id: None,
+                    telegram_id: Some(web_app_user.id),
+                    access_token: None, // установится ниже
+                    group: None,
+                    role: UserRole::Student, // TODO: при реге проверять данные
+                    android_version: None,
+                };
+
+                driver::users::insert(&app_state, &new_user)
+                    .await
+                    .map(|_| new_user)
+            }
+        }
+        .expect("Failed to get or add user")
+    };
+
+    user.access_token = Some(utility::jwt::encode(&user.id));
+
+    user.save(&app_state).await.expect("Failed to update user");
+
+    Ok(Response::new(
+        &*user.access_token.unwrap(),
+        user.group.is_some(),
+    ))
+    .into()
+}
+
+mod schema {
+    use crate::routes::schema::PartialOkResponse;
+    use crate::state::AppState;
+    use crate::utility::telegram::VerifyError;
+    use actix_macros::ErrResponse;
+    use actix_web::body::EitherBody;
+    use actix_web::cookie::CookieBuilder;
+    use actix_web::cookie::time::OffsetDateTime;
+    use actix_web::{HttpRequest, HttpResponse, web};
+    use derive_more::Display;
+    use serde::{Deserialize, Serialize, Serializer};
+    use std::ops::Add;
+    use std::sync::Arc;
+    use utoipa::ToSchema;
+
+    #[derive(Debug, Deserialize, Serialize, ToSchema)]
+    #[serde(rename_all = "camelCase")]
+    #[schema(as = Flow::TelegramAuth::Request)]
+    pub struct Request {
+        /// Telegram WebApp init data.
+        pub init_data: String,
+    }
+
+    #[derive(Serialize, ToSchema)]
+    #[serde(rename_all = "camelCase")]
+    #[schema(as = Flow::TelegramAuth::Response)]
+    pub struct Response {
+        #[serde(skip)]
+        #[schema(ignore)]
+        access_token: String,
+
+        pub completed: bool,
+    }
+
+    impl Response {
+        pub fn new(access_token: &str, completed: bool) -> Self {
+            Self {
+                access_token: access_token.to_string(),
+                completed,
+            }
+        }
+    }
+
+    impl PartialOkResponse for Response {
+        fn post_process(
+            &mut self,
+            request: &HttpRequest,
+            response: &mut HttpResponse<EitherBody<String>>,
+        ) -> () {
+            let access_token = &self.access_token;
+
+            let app_state = request.app_data::<web::Data<AppState>>().unwrap();
+            let mini_app_host = &*app_state.get_env().telegram.mini_app_host;
+
+            let cookie = CookieBuilder::new("access_token", access_token)
+                .domain(mini_app_host)
+                .path("/")
+                .expires(
+                    OffsetDateTime::now_utc().add(std::time::Duration::from_secs(60 * 60 * 24 * 7)),
+                )
+                .http_only(true)
+                .secure(true)
+                .finish();
+
+            response.add_cookie(&cookie).unwrap();
+        }
+    }
+
+    pub type ServiceResponse = crate::routes::schema::Response<Response, ErrorCode>;
+
+    #[derive(Clone, ToSchema, Display, ErrResponse)]
+    #[status_code = "actix_web::http::StatusCode::UNAUTHORIZED"]
+    #[schema(as = Flow::TelegramAuth::ErrorCode)]
+    pub enum ErrorCode {
+        #[display("Invalid init data provided: {_0}")]
+        #[schema(value_type = String)]
+        InvalidInitData(Arc<VerifyError>),
+
+        #[display("Expired init data provided.")]
+        ExpiredInitData,
+    }
+
+    impl Serialize for ErrorCode {
+        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+        where
+            S: Serializer,
+        {
+            match self {
+                ErrorCode::InvalidInitData(_) => serializer.serialize_str("INVALID_INIT_DATA"),
+                ErrorCode::ExpiredInitData => serializer.serialize_str("EXPIRED_INIT_DATA"),
+            }
+        }
+    }
+}

src/routes/flow/telegram_complete.rs

@@ -0,0 +1,95 @@
+use self::schema::*;
+use crate::AppState;
+use crate::database::driver;
+use crate::database::driver::users::UserSave;
+use crate::database::models::User;
+use crate::extractors::base::AsyncExtractor;
+use crate::routes::schema::ResponseError;
+use actix_web::{post, web};
+use web::Json;
+
+#[utoipa::path(responses(
+    (status = OK),
+    (status = CONFLICT, body = ResponseError<ErrorCode>),
+    (status = INTERNAL_SERVER_ERROR, body = ResponseError<ErrorCode>),
+    (status = BAD_REQUEST, body = ResponseError<ErrorCode>)
+))]
+#[post("/telegram-complete")]
+pub async fn telegram_complete(
+    data: Json<Request>,
+    app_state: web::Data<AppState>,
+    user: AsyncExtractor<User>,
+) -> ServiceResponse {
+    let mut user = user.into_inner();
+
+    // проверка на перезапись уже имеющихся данных
+    if user.group.is_some() {
+        return Err(ErrorCode::AlreadyCompleted).into();
+    }
+
+    let data = data.into_inner();
+
+    // замена существующего имени, если оно отличается
+    if user.username != data.username {
+        if driver::users::contains_by_username(&app_state, &data.username).await {
+            return Err(ErrorCode::UsernameAlreadyExists).into();
+        }
+
+        user.username = data.username;
+    }
+
+    // проверка на существование группы
+    if !app_state
+        .get_schedule_snapshot("eng_polytechnic")
+        .await
+        .unwrap()
+        .data
+        .groups
+        .contains_key(&data.group)
+    {
+        return Err(ErrorCode::InvalidGroupName).into();
+    }
+
+    user.group = Some(data.group);
+
+    user.save(&app_state).await.expect("Failed to update user");
+
+    Ok(()).into()
+}
+
+mod schema {
+    use actix_macros::ErrResponse;
+    use derive_more::Display;
+    use serde::{Deserialize, Serialize};
+    use utoipa::ToSchema;
+
+    #[derive(Debug, Deserialize, Serialize, ToSchema)]
+    #[schema(as = Flow::TelegramFill::Request)]
+    pub struct Request {
+        /// Username.
+        pub username: String,
+
+        /// Group.
+        pub group: String,
+    }
+
+    pub type ServiceResponse = crate::routes::schema::Response<(), ErrorCode>;
+
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
+    #[status_code = "actix_web::http::StatusCode::UNAUTHORIZED"]
+    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+    #[schema(as = Flow::TelegramFill::ErrorCode)]
+    pub enum ErrorCode {
+        #[display("This flow already completed.")]
+        #[status_code = "actix_web::http::StatusCode::CONFLICT"]
+        AlreadyCompleted,
+
+        #[display("Username is already exists.")]
+        #[status_code = "actix_web::http::StatusCode::BAD_REQUEST"]
+        UsernameAlreadyExists,
+
+        #[display("The required group does not exist.")]
+        #[status_code = "actix_web::http::StatusCode::BAD_REQUEST"]
+        InvalidGroupName,
+    }
+}

src/routes/mod.rs

@@ -1,5 +1,5 @@
 pub mod auth;
-pub mod fcm;
+pub mod flow;
 pub mod schedule;
 mod schema;
 pub mod users;

src/routes/schedule/cache_status.rs

@@ -7,17 +7,5 @@ use actix_web::{get, web};
 ))]
 #[get("/cache-status")]
 pub async fn cache_status(app_state: web::Data<AppState>) -> CacheStatus {
-    // Prevent thread lock
-    let has_schedule = app_state
-        .schedule
-        .lock()
-        .as_ref()
-        .map(|res| res.is_some())
-        .unwrap();
-
-    match has_schedule {
-        true => CacheStatus::from(&app_state),
-        false => CacheStatus::default(),
-    }
-    .into()
+    CacheStatus::from(&app_state).await.into()
 }

src/routes/schedule/group.rs

@@ -1,12 +1,13 @@
 use self::schema::*;
 use crate::AppState;
 use crate::database::models::User;
-use crate::extractors::base::SyncExtractor;
-use crate::routes::schema::{IntoResponseAsError, ResponseError};
+use crate::extractors::base::AsyncExtractor;
+use crate::routes::schedule::schema::ScheduleEntryResponse;
+use crate::routes::schema::ResponseError;
 use actix_web::{get, web};
 
 #[utoipa::path(responses(
-    (status = OK, body = Response),
+    (status = OK, body = ScheduleEntryResponse),
     (
         status = SERVICE_UNAVAILABLE,
         body = ResponseError<ErrorCode>,
@@ -25,68 +26,43 @@ use actix_web::{get, web};
     ),
 ))]
 #[get("/group")]
-pub async fn group(user: SyncExtractor<User>, app_state: web::Data<AppState>) -> ServiceResponse {
-    // Prevent thread lock
-    let schedule_lock = app_state.schedule.lock().unwrap();
+pub async fn group(user: AsyncExtractor<User>, app_state: web::Data<AppState>) -> ServiceResponse {
+    match &user.into_inner().group {
+        None => Err(ErrorCode::SignUpNotCompleted),
 
-    match schedule_lock.as_ref() {
-        None => ErrorCode::NoSchedule.into_response(),
-        Some(schedule) => match schedule.data.groups.get(&user.into_inner().group) {
-            None => ErrorCode::NotFound.into_response(),
-            Some(entry) => Ok(entry.clone().into()).into(),
+        Some(group) => match app_state
+            .get_schedule_snapshot("eng_polytechnic")
+            .await
+            .unwrap()
+            .data
+            .groups
+            .get(group)
+        {
+            None => Err(ErrorCode::NotFound),
+
+            Some(entry) => Ok(entry.clone().into()),
         },
     }
+    .into()
 }
 
 mod schema {
-    use crate::parser::schema::ScheduleEntry;
-    use actix_macros::{IntoResponseErrorNamed, StatusCode};
-    use chrono::{DateTime, NaiveDateTime, Utc};
+    use crate::routes::schedule::schema::ScheduleEntryResponse;
+    use actix_macros::ErrResponse;
     use derive_more::Display;
     use serde::Serialize;
     use utoipa::ToSchema;
 
-    pub type ServiceResponse = crate::routes::schema::Response<Response, ErrorCode>;
+    pub type ServiceResponse = crate::routes::schema::Response<ScheduleEntryResponse, ErrorCode>;
 
-    #[derive(Serialize, ToSchema)]
-    #[schema(as = GetGroup::Response)]
-    #[serde(rename_all = "camelCase")]
-    pub struct Response {
-        /// Group schedule.
-        pub group: ScheduleEntry,
-
-        /// ## Outdated variable.
-        ///
-        /// By default, an empty list is returned.
-        #[deprecated = "Will be removed in future versions"]
-        pub updated: Vec<i32>,
-
-        /// ## Outdated variable.
-        ///
-        /// By default, the initial date for unix.
-        #[deprecated = "Will be removed in future versions"]
-        pub updated_at: DateTime<Utc>,
-    }
-
-    #[allow(deprecated)]
-    impl From<ScheduleEntry> for Response {
-        fn from(group: ScheduleEntry) -> Self {
-            Self {
-                group,
-                updated: Vec::new(),
-                updated_at: NaiveDateTime::default().and_utc(),
-            }
-        }
-    }
-
-    #[derive(Clone, Serialize, ToSchema, StatusCode, Display, IntoResponseErrorNamed)]
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
     #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
     #[schema(as = GroupSchedule::ErrorCode)]
     pub enum ErrorCode {
-        /// Schedules have not yet been parsed.
-        #[status_code = "actix_web::http::StatusCode::SERVICE_UNAVAILABLE"]
-        #[display("Schedule not parsed yet.")]
-        NoSchedule,
+        /// The user tried to access the API without completing singing up.
+        #[status_code = "actix_web::http::StatusCode::FORBIDDEN"]
+        #[display("You have not completed signing up.")]
+        SignUpNotCompleted,
 
         /// Group not found.
         #[status_code = "actix_web::http::StatusCode::NOT_FOUND"]

src/routes/schedule/group_names.rs

@@ -1,48 +1,35 @@
 use self::schema::*;
 use crate::AppState;
-use crate::routes::schedule::schema::ErrorCode;
-use crate::routes::schema::{IntoResponseAsError, ResponseError};
 use actix_web::{get, web};
 
-#[utoipa::path(responses(
-    (status = OK, body = Response),
-    (status = SERVICE_UNAVAILABLE, body = ResponseError<ErrorCode>),
-))]
+#[utoipa::path(responses((status = OK, body = Response)))]
 #[get("/group-names")]
-pub async fn group_names(app_state: web::Data<AppState>) -> ServiceResponse {
-    // Prevent thread lock
-    let schedule_lock = app_state.schedule.lock().unwrap();
+pub async fn group_names(app_state: web::Data<AppState>) -> Response {
+    let mut names: Vec<String> = app_state
+        .get_schedule_snapshot("eng_polytechnic")
+        .await
+        .unwrap()
+        .data
+        .groups
+        .keys()
+        .cloned()
+        .collect();
 
-    match schedule_lock.as_ref() {
-        None => ErrorCode::NoSchedule.into_response(),
-        Some(schedule) => {
-            let mut names: Vec<String> = schedule.data.groups.keys().cloned().collect();
-            names.sort();
+    names.sort();
 
-            Ok(names.into()).into()
-        }
-    }
-    .into()
+    Response { names }
 }
 
 mod schema {
-    use crate::routes::schedule::schema::ErrorCode;
+    use actix_macros::ResponderJson;
     use serde::Serialize;
     use utoipa::ToSchema;
 
-    pub type ServiceResponse = crate::routes::schema::Response<Response, ErrorCode>;
-
-    #[derive(Serialize, ToSchema)]
+    #[derive(Serialize, ToSchema, ResponderJson)]
     #[schema(as = GetGroupNames::Response)]
     pub struct Response {
         /// List of group names sorted in alphabetical order.
         #[schema(examples(json!(["ИС-214/23"])))]
         pub names: Vec<String>,
     }
-
-    impl From<Vec<String>> for Response {
-        fn from(names: Vec<String>) -> Self {
-            Self { names }
-        }
-    }
 }

src/routes/schedule/mod.rs

@@ -2,10 +2,9 @@ mod cache_status;
 mod group;
 mod group_names;
 mod schedule;
+mod schema;
 mod teacher;
 mod teacher_names;
-mod schema;
-mod update_download_url;
 
 pub use cache_status::*;
 pub use group::*;
@@ -13,4 +12,3 @@ pub use group_names::*;
 pub use schedule::*;
 pub use teacher::*;
 pub use teacher_names::*;
-pub use update_download_url::*;

src/routes/schedule/schedule.rs

@@ -1,25 +1,9 @@
-use self::schema::*;
-use crate::app_state::AppState;
-use crate::routes::schedule::schema::{ErrorCode, ScheduleView};
-use crate::routes::schema::{IntoResponseAsError, ResponseError};
+use crate::routes::schedule::schema::ScheduleView;
+use crate::state::AppState;
 use actix_web::{get, web};
 
-#[utoipa::path(responses(
-    (status = OK, body = ScheduleView),
-    (status = SERVICE_UNAVAILABLE, body = ResponseError<ErrorCode>)
-))]
+#[utoipa::path(responses((status = OK, body = ScheduleView)))]
 #[get("/")]
-pub async fn schedule(app_state: web::Data<AppState>) -> ServiceResponse {
-    match ScheduleView::try_from(&app_state) {
-        Ok(res) => Ok(res).into(),
-        Err(e) => match e {
-            ErrorCode::NoSchedule => ErrorCode::NoSchedule.into_response(),
-        },
-    }
-}
-
-mod schema {
-    use crate::routes::schedule::schema::{ErrorCode, ScheduleView};
-
-    pub type ServiceResponse = crate::routes::schema::Response<ScheduleView, ErrorCode>;
+pub async fn schedule(app_state: web::Data<AppState>) -> ScheduleView {
+    ScheduleView::from(&app_state).await
 }

src/routes/schedule/schema.rs

@@ -1,25 +1,18 @@
-use crate::app_state::{AppState, Schedule};
-use crate::parser::schema::ScheduleEntry;
-use actix_macros::{IntoResponseErrorNamed, ResponderJson, StatusCode};
+use crate::state::AppState;
+use actix_macros::{OkResponse, ResponderJson};
 use actix_web::web;
-use chrono::{DateTime, Duration, Utc};
-use derive_more::Display;
+use providers::base::{ScheduleEntry, ScheduleSnapshot};
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
+use std::ops::Deref;
 use utoipa::ToSchema;
 
 /// Response from schedule server.
-#[derive(Serialize, ToSchema)]
+#[derive(Serialize, ToSchema, OkResponse, ResponderJson)]
 #[serde(rename_all = "camelCase")]
 pub struct ScheduleView {
-    /// ETag schedules on polytechnic server.
-    etag: String,
-
-    /// Schedule update date on polytechnic website.
-    uploaded_at: DateTime<Utc>,
-
-    /// Date last downloaded from the Polytechnic server.
-    downloaded_at: DateTime<Utc>,
+    /// Url to xls file.
+    url: String,
 
     /// Groups schedule.
     groups: HashMap<String, ScheduleEntry>,
@@ -28,80 +21,66 @@ pub struct ScheduleView {
     teachers: HashMap<String, ScheduleEntry>,
 }
 
-#[derive(Clone, Serialize, ToSchema, StatusCode, Display, IntoResponseErrorNamed)]
-#[status_code = "actix_web::http::StatusCode::SERVICE_UNAVAILABLE"]
-#[serde(rename_all = "SCREAMING_SNAKE_CASE")]
-#[schema(as = ScheduleShared::ErrorCode)]
-pub enum ErrorCode {
-    /// Schedules not yet parsed.
-    #[display("Schedule not parsed yet.")]
-    NoSchedule,
+#[derive(Serialize, ToSchema, OkResponse)]
+pub struct ScheduleEntryResponse(ScheduleEntry);
+
+impl From<ScheduleEntry> for ScheduleEntryResponse {
+    fn from(value: ScheduleEntry) -> Self {
+        Self(value)
+    }
 }
 
-impl TryFrom<&web::Data<AppState>> for ScheduleView {
-    type Error = ErrorCode;
+impl ScheduleView {
+    pub async fn from(app_state: &web::Data<AppState>) -> Self {
+        let schedule = app_state
+            .get_schedule_snapshot("eng_polytechnic")
+            .await
+            .unwrap()
+            .deref()
+            .clone();
 
-    fn try_from(app_state: &web::Data<AppState>) -> Result<Self, Self::Error> {
-        if let Some(schedule) = app_state.schedule.lock().unwrap().clone() {
-            Ok(Self {
-                etag: schedule.etag,
-                uploaded_at: schedule.updated_at,
-                downloaded_at: schedule.parsed_at,
-                groups: schedule.data.groups,
-                teachers: schedule.data.teachers,
-            })
-        } else {
-            Err(ErrorCode::NoSchedule)
+        Self {
+            url: schedule.url,
+            groups: schedule.data.groups,
+            teachers: schedule.data.teachers,
         }
     }
 }
 
 /// Cached schedule status.
-#[derive(Serialize, Deserialize, ToSchema, ResponderJson)]
+#[derive(Serialize, Deserialize, ToSchema, ResponderJson, OkResponse)]
 #[serde(rename_all = "camelCase")]
 pub struct CacheStatus {
     /// Schedule hash.
-    pub cache_hash: String,
-
-    /// Whether the schedule reference needs to be updated.
-    pub cache_update_required: bool,
+    pub hash: String,
 
     /// Last cache update date.
-    pub last_cache_update: i64,
+    pub fetched_at: i64,
 
     /// Cached schedule update date.
     ///
     /// Determined by the polytechnic's server.
-    pub last_schedule_update: i64,
+    pub updated_at: i64,
 }
 
 impl CacheStatus {
-    pub fn default() -> Self {
-        CacheStatus {
-            cache_hash: "0000000000000000000000000000000000000000".to_string(),
-            cache_update_required: true,
-            last_cache_update: 0,
-            last_schedule_update: 0,
-        }
+    pub async fn from(value: &web::Data<AppState>) -> Self {
+        From::<&ScheduleSnapshot>::from(
+            value
+                .get_schedule_snapshot("eng_polytechnic")
+                .await
+                .unwrap()
+                .deref(),
+        )
     }
 }
 
-impl From<&web::Data<AppState>> for CacheStatus {
-    fn from(value: &web::Data<AppState>) -> Self {
-        let schedule_lock = value.schedule.lock().unwrap();
-        let schedule = schedule_lock.as_ref().unwrap();
-
-        CacheStatus::from(schedule)
-    }
-}
-
-impl From<&Schedule> for CacheStatus {
-    fn from(value: &Schedule) -> Self {
+impl From<&ScheduleSnapshot> for CacheStatus {
+    fn from(value: &ScheduleSnapshot) -> Self {
         Self {
-            cache_hash: value.hash(),
-            cache_update_required: (value.fetched_at - Utc::now()) > Duration::minutes(5),
-            last_cache_update: value.fetched_at.timestamp(),
-            last_schedule_update: value.updated_at.timestamp(),
+            hash: value.hash(),
+            fetched_at: value.fetched_at.timestamp(),
+            updated_at: value.updated_at.timestamp(),
         }
     }
 }

src/routes/schedule/teacher.rs

@@ -1,18 +1,11 @@
 use self::schema::*;
-use crate::routes::schema::{IntoResponseAsError, ResponseError};
 use crate::AppState;
+use crate::routes::schema::ResponseError;
 use actix_web::{get, web};
+use providers::base::ScheduleEntry;
 
 #[utoipa::path(responses(
-    (status = OK, body = Response),
-    (
-        status = SERVICE_UNAVAILABLE,
-        body = ResponseError<ErrorCode>,
-        example = json!({
-            "code": "NO_SCHEDULE",
-            "message": "Schedule not parsed yet."
-        })
-    ),
+    (status = OK, body = ScheduleEntry),
     (
         status = NOT_FOUND,
         body = ResponseError<ErrorCode>,
@@ -23,72 +16,35 @@ use actix_web::{get, web};
     ),
 ))]
 #[get("/teacher/{name}")]
-pub async fn teacher(
-    name: web::Path<String>,
-    app_state: web::Data<AppState>,
-) -> ServiceResponse {
-    // Prevent thread lock
-    let schedule_lock = app_state.schedule.lock().unwrap();
+pub async fn teacher(name: web::Path<String>, app_state: web::Data<AppState>) -> ServiceResponse {
+    match app_state
+        .get_schedule_snapshot("eng_polytechnic")
+        .await
+        .unwrap()
+        .data
+        .teachers
+        .get(&name.into_inner())
+    {
+        None => Err(ErrorCode::NotFound),
 
-    match schedule_lock.as_ref() {
-        None => ErrorCode::NoSchedule.into_response(),
-        Some(schedule) => match schedule.data.teachers.get(&name.into_inner()) {
-            None => ErrorCode::NotFound.into_response(),
-            Some(entry) => Ok(entry.clone().into()).into(),
-        },
+        Some(entry) => Ok(entry.clone().into()),
     }
+    .into()
 }
 
 mod schema {
-    use crate::parser::schema::ScheduleEntry;
-    use actix_macros::{IntoResponseErrorNamed, StatusCode};
-    use chrono::{DateTime, NaiveDateTime, Utc};
+    use crate::routes::schedule::schema::ScheduleEntryResponse;
+    use actix_macros::ErrResponse;
     use derive_more::Display;
     use serde::Serialize;
     use utoipa::ToSchema;
 
-    pub type ServiceResponse = crate::routes::schema::Response<Response, ErrorCode>;
+    pub type ServiceResponse = crate::routes::schema::Response<ScheduleEntryResponse, ErrorCode>;
 
-    #[derive(Serialize, ToSchema)]
-    #[schema(as = GetTeacher::Response)]
-    #[serde(rename_all = "camelCase")]
-    pub struct Response {
-        /// Teacher's schedule.
-        pub teacher: ScheduleEntry,
-
-        /// ## Deprecated variable.
-        ///
-        /// By default, an empty list is returned.
-        #[deprecated = "Will be removed in future versions"]
-        pub updated: Vec<i32>,
-
-        /// ## Deprecated variable.
-        ///
-        /// Defaults to the Unix start date.
-        #[deprecated = "Will be removed in future versions"]
-        pub updated_at: DateTime<Utc>,
-    }
-
-    #[allow(deprecated)]
-    impl From<ScheduleEntry> for Response {
-        fn from(teacher: ScheduleEntry) -> Self {
-            Self {
-                teacher,
-                updated: Vec::new(),
-                updated_at: NaiveDateTime::default().and_utc(),
-            }
-        }
-    }
-
-    #[derive(Clone, Serialize, ToSchema, StatusCode, Display, IntoResponseErrorNamed)]
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
     #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
     #[schema(as = TeacherSchedule::ErrorCode)]
     pub enum ErrorCode {
-        /// Schedules have not yet been parsed.
-        #[status_code = "actix_web::http::StatusCode::SERVICE_UNAVAILABLE"]
-        #[display("Schedule not parsed yet.")]
-        NoSchedule,
-
         /// Teacher not found.
         #[status_code = "actix_web::http::StatusCode::NOT_FOUND"]
         #[display("Required teacher not found.")]

src/routes/schedule/teacher_names.rs

@@ -1,48 +1,35 @@
 use self::schema::*;
 use crate::AppState;
-use crate::routes::schedule::schema::ErrorCode;
-use crate::routes::schema::{IntoResponseAsError, ResponseError};
 use actix_web::{get, web};
 
-#[utoipa::path(responses(
-    (status = OK, body = Response),
-    (status = SERVICE_UNAVAILABLE, body = ResponseError<ErrorCode>),
-))]
+#[utoipa::path(responses((status = OK, body = Response)))]
 #[get("/teacher-names")]
-pub async fn teacher_names(app_state: web::Data<AppState>) -> ServiceResponse {
-    // Prevent thread lock
-    let schedule_lock = app_state.schedule.lock().unwrap();
+pub async fn teacher_names(app_state: web::Data<AppState>) -> Response {
+    let mut names: Vec<String> = app_state
+        .get_schedule_snapshot("eng_polytechnic")
+        .await
+        .unwrap()
+        .data
+        .teachers
+        .keys()
+        .cloned()
+        .collect();
 
-    match schedule_lock.as_ref() {
-        None => ErrorCode::NoSchedule.into_response(),
-        Some(schedule) => {
-            let mut names: Vec<String> = schedule.data.teachers.keys().cloned().collect();
-            names.sort();
+    names.sort();
 
-            Ok(names.into()).into()
-        }
-    }
-    .into()
+    Response { names }
 }
 
 mod schema {
-    use crate::routes::schedule::schema::ErrorCode;
+    use actix_macros::ResponderJson;
     use serde::Serialize;
     use utoipa::ToSchema;
 
-    pub type ServiceResponse = crate::routes::schema::Response<Response, ErrorCode>;
-
-    #[derive(Serialize, ToSchema)]
+    #[derive(Serialize, ToSchema, ResponderJson)]
     #[schema(as = GetTeacherNames::Response)]
     pub struct Response {
         /// List of teacher names sorted alphabetically.
         #[schema(examples(json!(["Хомченко Н.Е."])))]
         pub names: Vec<String>,
     }
-
-    impl From<Vec<String>> for Response {
-        fn from(names: Vec<String>) -> Self {
-            Self { names }
-        }
-    }
 }

src/routes/schedule/update_download_url.rs

@@ -1,137 +0,0 @@
-use self::schema::*;
-use crate::AppState;
-use crate::app_state::Schedule;
-use crate::parser::parse_xls;
-use crate::routes::schedule::schema::CacheStatus;
-use crate::routes::schema::{IntoResponseAsError, ResponseError};
-use crate::xls_downloader::interface::XLSDownloader;
-use actix_web::web::Json;
-use actix_web::{patch, web};
-use chrono::Utc;
-
-#[utoipa::path(responses(
-    (status = OK, body = CacheStatus),
-    (status = NOT_ACCEPTABLE, body = ResponseError<ErrorCode>),
-))]
-#[patch("/update-download-url")]
-pub async fn update_download_url(
-    data: Json<Request>,
-    app_state: web::Data<AppState>,
-) -> ServiceResponse {
-    if !data.url.starts_with("https://politehnikum-eng.ru/") {
-        return ErrorCode::NonWhitelistedHost.into_response();
-    }
-
-    let mut downloader = app_state.downloader.lock().unwrap();
-
-    if let Some(url) = &downloader.url {
-        if url.eq(&data.url) {
-            return Ok(CacheStatus::from(&app_state)).into();
-        }
-    }
-
-    match downloader.set_url(data.url.clone()).await {
-        Ok(fetch_result) => {
-            let mut schedule = app_state.schedule.lock().unwrap();
-
-            if schedule.is_some()
-                && fetch_result.uploaded_at < schedule.as_ref().unwrap().updated_at
-            {
-                return ErrorCode::OutdatedSchedule.into_response();
-            }
-
-            match downloader.fetch(false).await {
-                Ok(download_result) => match parse_xls(&download_result.data.unwrap()) {
-                    Ok(data) => {
-                        *schedule = Some(Schedule {
-                            etag: download_result.etag,
-                            fetched_at: download_result.requested_at,
-                            updated_at: download_result.uploaded_at,
-                            parsed_at: Utc::now(),
-                            data,
-                        });
-
-                        Ok(CacheStatus::from(schedule.as_ref().unwrap())).into()
-                    }
-                    Err(error) => {
-                        sentry::capture_error(&error);
-
-                        ErrorCode::InvalidSchedule(error).into_response()
-                    }
-                },
-                Err(error) => {
-                    eprintln!("Unknown url provided {}", data.url);
-                    eprintln!("{:?}", error);
-
-                    ErrorCode::DownloadFailed.into_response()
-                }
-            }
-        }
-        Err(error) => {
-            eprintln!("Unknown url provided {}", data.url);
-            eprintln!("{:?}", error);
-
-            ErrorCode::FetchFailed.into_response()
-        }
-    }
-}
-
-mod schema {
-    use crate::parser::schema::ParseError;
-    use crate::routes::schedule::schema::CacheStatus;
-    use actix_macros::{IntoResponseErrorNamed, StatusCode};
-    use derive_more::Display;
-    use serde::{Deserialize, Serialize, Serializer};
-    use utoipa::ToSchema;
-
-    pub type ServiceResponse = crate::routes::schema::Response<CacheStatus, ErrorCode>;
-
-    #[derive(Serialize, Deserialize, ToSchema)]
-    pub struct Request {
-        /// Schedule link.
-        pub url: String,
-    }
-
-    #[derive(Clone, ToSchema, StatusCode, Display, IntoResponseErrorNamed)]
-    #[status_code = "actix_web::http::StatusCode::NOT_ACCEPTABLE"]
-    #[schema(as = SetDownloadUrl::ErrorCode)]
-    pub enum ErrorCode {
-        /// Transferred link with host different from politehnikum-eng.ru.
-        #[display("URL with unknown host provided. Provide url with 'politehnikum-eng.ru' host.")]
-        NonWhitelistedHost,
-
-        /// Failed to retrieve file metadata.
-        #[display("Unable to retrieve metadata from the specified URL.")]
-        FetchFailed,
-
-        /// Failed to download the file.
-        #[display("Unable to retrieve data from the specified URL.")]
-        DownloadFailed,
-
-        /// The link leads to an outdated schedule.
-        ///
-        /// An outdated schedule refers to a schedule that was published earlier
-        /// than is currently available.
-        #[display("The schedule is older than it already is.")]
-        OutdatedSchedule,
-
-        /// Failed to parse the schedule.
-        #[display("{_0}")]
-        InvalidSchedule(ParseError),
-    }
-
-    impl Serialize for ErrorCode {
-        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-        where
-            S: Serializer,
-        {
-            match self {
-                ErrorCode::NonWhitelistedHost => serializer.serialize_str("NON_WHITELISTED_HOST"),
-                ErrorCode::FetchFailed => serializer.serialize_str("FETCH_FAILED"),
-                ErrorCode::DownloadFailed => serializer.serialize_str("DOWNLOAD_FAILED"),
-                ErrorCode::OutdatedSchedule => serializer.serialize_str("OUTDATED_SCHEDULE"),
-                ErrorCode::InvalidSchedule(_) => serializer.serialize_str("INVALID_SCHEDULE"),
-            }
-        }
-    }
-}

src/routes/schema.rs

@@ -4,22 +4,19 @@ use actix_web::http::StatusCode;
 use actix_web::{HttpRequest, HttpResponse, Responder};
 use serde::{Serialize, Serializer};
 use std::convert::Into;
+use std::fmt::Display;
 use utoipa::PartialSchema;
 
 pub struct Response<T, E>(pub Result<T, E>)
 where
-    T: Serialize + PartialSchema,
-    E: Serialize + PartialSchema + Clone + PartialStatusCode;
-
-pub trait PartialStatusCode {
-    fn status_code(&self) -> StatusCode;
-}
+    T: Serialize + PartialSchema + PartialOkResponse,
+    E: Serialize + PartialSchema + Display + PartialErrResponse;
 
 /// Transform Response<T, E> into Result<T, E>
 impl<T, E> Into<Result<T, E>> for Response<T, E>
 where
-    T: Serialize + PartialSchema,
-    E: Serialize + PartialSchema + Clone + PartialStatusCode,
+    T: Serialize + PartialSchema + PartialOkResponse,
+    E: Serialize + PartialSchema + Display + PartialErrResponse,
 {
     fn into(self) -> Result<T, E> {
         self.0
@@ -29,8 +26,8 @@ where
 /// Transform T into Response<T, E>
 impl<T, E> From<Result<T, E>> for Response<T, E>
 where
-    T: Serialize + PartialSchema,
-    E: Serialize + PartialSchema + Clone + PartialStatusCode,
+    T: Serialize + PartialSchema + PartialOkResponse,
+    E: Serialize + PartialSchema + Display + PartialErrResponse,
 {
     fn from(value: Result<T, E>) -> Self {
         Response(value)
@@ -40,17 +37,16 @@ where
 /// Serialize Response<T, E>
 impl<T, E> Serialize for Response<T, E>
 where
-    T: Serialize + PartialSchema,
-    E: Serialize + PartialSchema + Clone + PartialStatusCode + Into<ResponseError<E>>,
+    T: Serialize + PartialSchema + PartialOkResponse,
+    E: Serialize + PartialSchema + Display + PartialErrResponse + Clone + Into<ResponseError<E>>,
 {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
     where
         S: Serializer,
     {
         match &self.0 {
-            Ok(ok) => serializer.serialize_some::<T>(&ok),
-            Err(err) => serializer
-                .serialize_some::<ResponseError<E>>(&ResponseError::<E>::from(err.clone().into())),
+            Ok(ok) => serializer.serialize_some(&ok),
+            Err(err) => serializer.serialize_some(&ResponseError::<E>::from(err.clone().into())),
         }
     }
 }
@@ -58,12 +54,12 @@ where
 /// Transform Response<T, E> to HttpResponse<String>
 impl<T, E> Responder for Response<T, E>
 where
-    T: Serialize + PartialSchema,
-    E: Serialize + PartialSchema + Clone + PartialStatusCode + Into<ResponseError<E>>,
+    T: Serialize + PartialSchema + PartialOkResponse,
+    E: Serialize + PartialSchema + Display + PartialErrResponse + Clone + Into<ResponseError<E>>,
 {
     type Body = EitherBody<String>;
 
-    fn respond_to(self, _: &HttpRequest) -> HttpResponse<Self::Body> {
+    fn respond_to(mut self, request: &HttpRequest) -> HttpResponse<Self::Body> {
         match serde_json::to_string(&self) {
             Ok(body) => {
                 let code = match &self.0 {
@@ -71,13 +67,19 @@ where
                     Err(e) => e.status_code(),
                 };
 
-                match HttpResponse::build(code)
+                let mut response = match HttpResponse::build(code)
                     .content_type(mime::APPLICATION_JSON)
                     .message_body(body)
                 {
                     Ok(res) => res.map_into_left_body(),
                     Err(err) => HttpResponse::from_error(err).map_into_right_body(),
+                };
+
+                if let Ok(ok) = &mut self.0 {
+                    ok.post_process(request, &mut response);
                 }
+
+                response
             }
 
             Err(err) => {
@@ -87,61 +89,80 @@ where
     }
 }
 
-/// ResponseError<T>
-///
-/// Field `message` is optional for backwards compatibility with Android App, that produces error if new fields will be added to JSON response.
-#[derive(Serialize, utoipa::ToSchema)]
-pub struct ResponseError<T: Serialize + PartialSchema> {
-    pub code: T,
-
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub message: Option<String>,
+/// Трейт для всех положительных ответов от сервера
+pub trait PartialOkResponse {
+    fn post_process(
+        &mut self,
+        _request: &HttpRequest,
+        _response: &mut HttpResponse<EitherBody<String>>,
+    ) -> () {
+    }
 }
 
-pub trait IntoResponseAsError<T>
+impl PartialOkResponse for () {}
+
+/// Трейт для всех отрицательных ответов от сервера
+pub trait PartialErrResponse {
+    fn status_code(&self) -> StatusCode;
+}
+
+/// ResponseError<T>
+#[derive(Serialize, utoipa::ToSchema)]
+pub struct ResponseError<T: Serialize + PartialSchema + Clone> {
+    pub code: T,
+    pub message: String,
+}
+
+impl<T> From<T> for ResponseError<T>
 where
-    T: Serialize + PartialSchema,
-    Self: Serialize + PartialSchema + Clone + PartialStatusCode + Into<ResponseError<Self>>,
+    T: Serialize + PartialSchema + Display + Clone,
 {
-    fn into_response(self) -> Response<T, Self> {
-        Response(Err(self))
+    fn from(code: T) -> Self {
+        Self {
+            message: format!("{}", code),
+            code,
+        }
     }
 }
 
 pub mod user {
     use crate::database::models::{User, UserRole};
-    use actix_macros::ResponderJson;
+    use actix_macros::{OkResponse, ResponderJson};
     use serde::Serialize;
 
     //noinspection SpellCheckingInspection
-    /// Используется для скрытия чувствительных полей, таких как хеш пароля или FCM
-    #[derive(Serialize, utoipa::ToSchema, ResponderJson)]
+    /// Используется для скрытия чувствительных полей, таких как хеш пароля
+    #[derive(Serialize, utoipa::ToSchema, ResponderJson, OkResponse)]
     #[serde(rename_all = "camelCase")]
     pub struct UserResponse {
         /// UUID
         #[schema(examples("67dcc9a9507b0000772744a2"))]
-        id: String,
+        pub id: String,
 
         /// Имя пользователя
         #[schema(examples("n08i40k"))]
-        username: String,
+        pub username: String,
 
         /// Группа
         #[schema(examples("ИС-214/23"))]
-        group: String,
+        pub group: Option<String>,
 
         /// Роль
-        role: UserRole,
+        pub role: UserRole,
 
         /// Идентификатор привязанного аккаунта VK
         #[schema(examples(498094647, json!(null)))]
-        vk_id: Option<i32>,
+        pub vk_id: Option<i32>,
+
+        /// Идентификатор привязанного аккаунта Telegram
+        #[schema(examples(996004735, json!(null)))]
+        pub telegram_id: Option<i64>,
 
         /// JWT токен доступа
         #[schema(examples(
             "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6IjY3ZGNjOWE5NTA3YjAwMDA3NzI3NDRhMiIsImlhdCI6IjE3NDMxMDgwOTkiLCJleHAiOiIxODY5MjUyMDk5In0.rMgXRb3JbT9AvLK4eiY9HMB5LxgUudkpQyoWKOypZFY"
         ))]
-        access_token: String,
+        pub access_token: Option<String>,
     }
 
     /// Create UserResponse from User ref.
@@ -153,6 +174,7 @@ pub mod user {
                 group: user.group.clone(),
                 role: user.role.clone(),
                 vk_id: user.vk_id.clone(),
+                telegram_id: user.telegram_id.clone(),
                 access_token: user.access_token.clone(),
             }
         }
@@ -167,6 +189,7 @@ pub mod user {
                 group: user.group,
                 role: user.role,
                 vk_id: user.vk_id,
+                telegram_id: user.telegram_id,
                 access_token: user.access_token,
             }
         }

src/routes/users/change_group.rs

@@ -1,85 +1,63 @@
 use self::schema::*;
-use crate::app_state::AppState;
 use crate::database::driver::users::UserSave;
 use crate::database::models::User;
-use crate::extractors::base::SyncExtractor;
-use crate::routes::schema::IntoResponseAsError;
-use crate::utility::mutex::MutexScope;
+use crate::extractors::base::AsyncExtractor;
+use crate::state::AppState;
 use actix_web::{post, web};
 
 #[utoipa::path(responses((status = OK)))]
 #[post("/change-group")]
 pub async fn change_group(
     app_state: web::Data<AppState>,
-    user: SyncExtractor<User>,
+    user: AsyncExtractor<User>,
     data: web::Json<Request>,
 ) -> ServiceResponse {
     let mut user = user.into_inner();
 
-    if user.group == data.group {
-        return ErrorCode::SameGroup.into_response();
+    if user.group.is_some_and(|group| group == data.group) {
+        return Ok(()).into();
     }
 
-    if let Some(e) = app_state.schedule.scope(|schedule| match schedule {
-        Some(schedule) => {
-            if schedule.data.groups.contains_key(&data.group) {
-                None
-            } else {
-                Some(ErrorCode::NotFound)
-            }
-        }
-        None => Some(ErrorCode::NoSchedule),
-    }) {
-        return e.into_response();
+    if !app_state
+        .get_schedule_snapshot("eng_polytechnic")
+        .await
+        .unwrap()
+        .data
+        .groups
+        .contains_key(&data.group)
+    {
+        return Err(ErrorCode::NotFound).into();
     }
     
-    user.group = data.into_inner().group;
-
-    if let Some(e) = user.save(&app_state).err() {
-        eprintln!("Failed to update user: {e}");
-        return ErrorCode::InternalServerError.into_response();
-    }
+    user.group = Some(data.into_inner().group);
+    user.save(&app_state).await.unwrap();
     
     Ok(()).into()
 }
 
 mod schema {
-    use actix_macros::{IntoResponseErrorNamed, StatusCode};
+    use actix_macros::ErrResponse;
     use derive_more::Display;
     use serde::{Deserialize, Serialize};
     use utoipa::ToSchema;
 
     pub type ServiceResponse = crate::routes::schema::Response<(), ErrorCode>;
 
-    #[derive(Serialize, Deserialize, ToSchema)]
+    #[derive(Deserialize, ToSchema)]
     #[schema(as = ChangeGroup::Request)]
     pub struct Request {
-        /// Group name.
+        // Group.
         pub group: String,
     }
 
-    #[derive(Clone, Serialize, ToSchema, StatusCode, Display, IntoResponseErrorNamed)]
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
     #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
     #[schema(as = ChangeGroup::ErrorCode)]
     #[status_code = "actix_web::http::StatusCode::CONFLICT"]
     pub enum ErrorCode {
-        /// Schedules have not yet been received.
-        #[display("Schedule not parsed yet.")]
-        #[status_code = "actix_web::http::StatusCode::SERVICE_UNAVAILABLE"]
-        NoSchedule,
-
-        /// Passed the same group name that is currently there.
-        #[display("Passed the same group name as it is at the moment.")]
-        SameGroup,
-
         /// The required group does not exist.
         #[display("The required group does not exist.")]
         #[status_code = "actix_web::http::StatusCode::NOT_FOUND"]
         NotFound,
-
-        /// Server-side error.
-        #[display("Internal server error.")]
-        #[status_code = "actix_web::http::StatusCode::INTERNAL_SERVER_ERROR"]
-        InternalServerError,
     }
 }

src/routes/users/change_username.rs

@@ -1,41 +1,39 @@
 use self::schema::*;
-use crate::app_state::AppState;
 use crate::database::driver;
 use crate::database::driver::users::UserSave;
 use crate::database::models::User;
-use crate::extractors::base::SyncExtractor;
-use crate::routes::schema::IntoResponseAsError;
+use crate::extractors::base::AsyncExtractor;
+use crate::state::AppState;
 use actix_web::{post, web};
 
 #[utoipa::path(responses((status = OK)))]
 #[post("/change-username")]
 pub async fn change_username(
     app_state: web::Data<AppState>,
-    user: SyncExtractor<User>,
+    user: AsyncExtractor<User>,
     data: web::Json<Request>,
 ) -> ServiceResponse {
     let mut user = user.into_inner();
 
     if user.username == data.username {
-        return ErrorCode::SameUsername.into_response();
+        return Ok(()).into();
     }
 
-    if driver::users::get_by_username(&app_state, &data.username).is_ok() {
-        return ErrorCode::AlreadyExists.into_response();
+    if driver::users::get_by_username(&app_state, &data.username)
+        .await
+        .is_ok()
+    {
+        return Err(ErrorCode::AlreadyExists).into();
     }
 
     user.username = data.into_inner().username;
-
-    if let Some(e) = user.save(&app_state).err() {
-        eprintln!("Failed to update user: {e}");
-        return ErrorCode::InternalServerError.into_response();
-    }
+    user.save(&app_state).await.unwrap();
 
     Ok(()).into()
 }
 
 mod schema {
-    use actix_macros::{IntoResponseErrorNamed, StatusCode};
+    use actix_macros::ErrResponse;
     use derive_more::Display;
     use serde::{Deserialize, Serialize};
     use utoipa::ToSchema;
@@ -49,22 +47,13 @@ mod schema {
         pub username: String,
     }
 
-    #[derive(Clone, Serialize, ToSchema, StatusCode, Display, IntoResponseErrorNamed)]
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
     #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
     #[schema(as = ChangeUsername::ErrorCode)]
     #[status_code = "actix_web::http::StatusCode::CONFLICT"]
     pub enum ErrorCode {
-        /// The same name that is currently present is passed.
-        #[display("Passed the same name as it is at the moment.")]
-        SameUsername,
-
         /// A user with this name already exists.
         #[display("A user with this name already exists.")]
         AlreadyExists,
-
-        /// Server-side error.
-        #[display("Internal server error.")]
-        #[status_code = "actix_web::http::StatusCode::INTERNAL_SERVER_ERROR"]
-        InternalServerError,
     }
 }

src/routes/users/me.rs

@@ -1,10 +1,10 @@
 use crate::database::models::User;
-use crate::extractors::base::SyncExtractor;
-use actix_web::get;
+use crate::extractors::base::AsyncExtractor;
 use crate::routes::schema::user::UserResponse;
+use actix_web::get;
 
 #[utoipa::path(responses((status = OK, body = UserResponse)))]
 #[get("/me")]
-pub async fn me(user: SyncExtractor<User>) -> UserResponse {
+pub async fn me(user: AsyncExtractor<User>) -> UserResponse {
     user.into_inner().into()
 }

src/routes/vk_id/oauth.rs

@@ -1,6 +1,6 @@
 use self::schema::*;
-use crate::app_state::AppState;
-use crate::routes::schema::{IntoResponseAsError, ResponseError};
+use crate::routes::schema::ResponseError;
+use crate::state::AppState;
 use actix_web::{post, web};
 use serde::Deserialize;
 use std::collections::HashMap;
@@ -35,7 +35,7 @@ async fn oauth(data: web::Json<Request>, app_state: web::Data<AppState>) -> Serv
     let data = data.into_inner();
     let state = Uuid::new_v4().simple().to_string();
 
-    let vk_id = &app_state.vk_id;
+    let vk_id = &app_state.get_env().vk_id;
     let client_id = vk_id.client_id.clone().to_string();
 
     let mut params = HashMap::new();
@@ -56,24 +56,27 @@ async fn oauth(data: web::Json<Request>, app_state: web::Data<AppState>) -> Serv
     {
         Ok(res) => {
             if !res.status().is_success() {
-                return ErrorCode::VkIdError.into_response();
+                return Err(ErrorCode::VkIdError).into();
             }
 
-            if let Ok(auth_data) = res.json::<VkIdAuthResponse>().await {
-                Ok(Response {
+            match res.json::<VkIdAuthResponse>().await {
+                Ok(auth_data) => Ok(Response {
                     access_token: auth_data.id_token,
-                })
-                .into()
-            } else {
-                ErrorCode::VkIdError.into_response()
+                }),
+                Err(error) => {
+                    sentry::capture_error(&error);
+
+                    Err(ErrorCode::VkIdError)
+                }
             }
         }
-        Err(_) => ErrorCode::VkIdError.into_response(),
+        Err(_) => Err(ErrorCode::VkIdError),
     }
+    .into()
 }
 
 mod schema {
-    use actix_macros::{IntoResponseErrorNamed, StatusCode};
+    use actix_macros::{ErrResponse, OkResponse};
     use derive_more::Display;
     use serde::{Deserialize, Serialize};
     use utoipa::ToSchema;
@@ -94,7 +97,7 @@ mod schema {
         pub device_id: String,
     }
 
-    #[derive(Serialize, ToSchema)]
+    #[derive(Serialize, ToSchema, OkResponse)]
     #[serde(rename_all = "camelCase")]
     #[schema(as = VkIdOAuth::Response)]
     pub struct Response {
@@ -102,7 +105,7 @@ mod schema {
         pub access_token: String,
     }
 
-    #[derive(Clone, Serialize, ToSchema, IntoResponseErrorNamed, StatusCode, Display)]
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
     #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
     #[schema(as = VkIdOAuth::ErrorCode)]
     #[status_code = "actix_web::http::StatusCode::NOT_ACCEPTABLE"]

src/state/env/mod.rs

@@ -0,0 +1,23 @@
+pub mod schedule;
+pub mod telegram;
+pub mod vk_id;
+
+#[cfg(not(test))]
+pub mod yandex_cloud;
+
+pub use self::schedule::ScheduleEnvData;
+pub use self::telegram::TelegramEnvData;
+pub use self::vk_id::VkIdEnvData;
+
+#[cfg(not(test))]
+pub use self::yandex_cloud::YandexCloudEnvData;
+
+#[derive(Default)]
+pub struct AppEnv {
+    pub schedule: ScheduleEnvData,
+    pub telegram: TelegramEnvData,
+    pub vk_id: VkIdEnvData,
+    
+    #[cfg(not(test))]
+    pub yandex_cloud: YandexCloudEnvData,
+}

src/state/env/schedule.rs

@@ -0,0 +1,19 @@
+use std::env;
+
+#[derive(Clone)]
+pub struct ScheduleEnvData {
+    #[cfg(not(test))]
+    pub url: Option<String>,
+    pub auto_update: bool,
+}
+
+impl Default for ScheduleEnvData {
+    fn default() -> Self {
+        Self {
+            #[cfg(not(test))]
+            url: env::var("SCHEDULE_INIT_URL").ok(),
+            auto_update: !env::var("SCHEDULE_DISABLE_AUTO_UPDATE")
+                .is_ok_and(|v| v.eq("1") || v.eq("true")),
+        }
+    }
+}

src/state/env/telegram.rs

@@ -0,0 +1,28 @@
+use std::env;
+
+#[derive(Clone)]
+pub struct TelegramEnvData {
+    pub bot_id: i64,
+    pub mini_app_host: String,
+    pub test_dc: bool,
+}
+
+impl Default for TelegramEnvData {
+    fn default() -> Self {
+        let _self = Self {
+            bot_id: env::var("TELEGRAM_BOT_ID")
+                .expect("TELEGRAM_BOT_ID must be set")
+                .parse()
+                .expect("TELEGRAM_BOT_ID must be integer"),
+            mini_app_host: env::var("TELEGRAM_MINI_APP_HOST")
+                .expect("TELEGRAM_MINI_APP_HOST must be set"),
+            test_dc: env::var("TELEGRAM_TEST_DC").is_ok_and(|v| v.eq("1") || v.eq("true")),
+        };
+
+        if _self.test_dc {
+            log::warn!("Using test data-center of telegram!");
+        }
+
+        _self
+    }
+}

src/state/env/vk_id.rs

@@ -0,0 +1,19 @@
+use std::env;
+
+#[derive(Clone)]
+pub struct VkIdEnvData {
+    pub client_id: i32,
+    pub redirect_url: String,
+}
+
+impl Default for VkIdEnvData {
+    fn default() -> Self {
+        Self {
+            client_id: env::var("VK_ID_CLIENT_ID")
+                .expect("VK_ID_CLIENT_ID must be set")
+                .parse()
+                .expect("VK_ID_CLIENT_ID must be integer"),
+            redirect_url: env::var("VK_ID_REDIRECT_URI").expect("VK_ID_REDIRECT_URI must be set"),
+        }
+    }
+}

src/state/env/yandex_cloud.rs

@@ -0,0 +1,16 @@
+use std::env;
+
+#[derive(Clone)]
+pub struct YandexCloudEnvData {
+    pub api_key: String,
+    pub func_id: String,
+}
+
+impl Default for YandexCloudEnvData {
+    fn default() -> Self {
+        Self {
+            api_key: env::var("YANDEX_CLOUD_API_KEY").expect("YANDEX_CLOUD_API_KEY must be set"),
+            func_id: env::var("YANDEX_CLOUD_FUNC_ID").expect("YANDEX_CLOUD_FUNC_ID must be set"),
+        }
+    }
+}

src/state/mod.rs

@@ -0,0 +1,95 @@
+mod env;
+
+pub use crate::state::env::AppEnv;
+use actix_web::web;
+use diesel::{Connection, PgConnection};
+use providers::base::{ScheduleProvider, ScheduleSnapshot};
+use std::collections::HashMap;
+use std::sync::Arc;
+use tokio::sync::{Mutex, MutexGuard};
+use tokio_util::sync::CancellationToken;
+
+/// Common data provided to endpoints.
+pub struct AppState {
+    cancel_token: CancellationToken,
+    database: Mutex<PgConnection>,
+    providers: HashMap<String, Arc<dyn ScheduleProvider>>,
+    env: AppEnv,
+}
+
+impl AppState {
+    pub async fn new() -> Result<Self, Box<dyn std::error::Error>> {
+        let database_url = std::env::var("DATABASE_URL").expect("DATABASE_URL must be set");
+
+        let env = AppEnv::default();
+        let providers: HashMap<String, Arc<dyn ScheduleProvider>> = HashMap::from([(
+            "eng_polytechnic".to_string(),
+            providers::EngelsPolytechnicProvider::new({
+                #[cfg(test)]
+                {
+                    providers::EngelsPolytechnicUpdateSource::Prepared(ScheduleSnapshot {
+                        url: "".to_string(),
+                        fetched_at: chrono::DateTime::default(),
+                        updated_at: chrono::DateTime::default(),
+                        data: providers::test_utils::engels_polytechnic::test_result().unwrap(),
+                    })
+                }
+
+                #[cfg(not(test))]
+                {
+                    if let Some(url) = &env.schedule.url {
+                        providers::EngelsPolytechnicUpdateSource::Url(url.clone())
+                    } else {
+                        providers::EngelsPolytechnicUpdateSource::GrabFromSite {
+                            yandex_api_key: env.yandex_cloud.api_key.clone(),
+                            yandex_func_id: env.yandex_cloud.func_id.clone(),
+                        }
+                    }
+                }
+            })
+            .await?,
+        )]);
+
+        let this = Self {
+            cancel_token: CancellationToken::new(),
+            database: Mutex::new(
+                PgConnection::establish(&database_url)
+                    .unwrap_or_else(|_| panic!("Error connecting to {}", database_url)),
+            ),
+            env,
+            providers,
+        };
+
+        if this.env.schedule.auto_update {
+            for (_, provider) in &this.providers {
+                let provider = provider.clone();
+                let cancel_token = this.cancel_token.clone();
+
+                tokio::spawn(async move { provider.start_auto_update_task(cancel_token).await });
+            }
+        }
+
+        Ok(this)
+    }
+
+    pub async fn get_schedule_snapshot(&'_ self, provider: &str) -> Option<Arc<ScheduleSnapshot>> {
+        if let Some(provider) = self.providers.get(provider) {
+            return Some(provider.get_schedule().await);
+        }
+
+        None
+    }
+
+    pub async fn get_database(&'_ self) -> MutexGuard<'_, PgConnection> {
+        self.database.lock().await
+    }
+
+    pub fn get_env(&self) -> &AppEnv {
+        &self.env
+    }
+}
+
+/// Create a new object web::Data<AppState>.
+pub async fn new_app_state() -> Result<web::Data<AppState>, Box<dyn std::error::Error>> {
+    Ok(web::Data::new(AppState::new().await?))
+}

src/test_env.rs

@@ -1,25 +1,19 @@
 #[cfg(test)]
 pub(crate) mod tests {
-    use crate::app_state::{AppState, Schedule, app_state};
-    use crate::parser::tests::test_result;
+    use crate::state::{new_app_state, AppState};
     use actix_web::web;
+    use log::info;
     use tokio::sync::OnceCell;
 
     pub fn test_env() {
-        dotenvy::from_path(".env.test").expect("Failed to load test environment file");
+        info!("Loading test environment file...");
+        dotenvy::from_filename(".env.test.local")
+            .or_else(|_| dotenvy::from_filename(".env.test"))
+            .expect("Failed to load test environment file");
     }
 
     pub async fn test_app_state() -> web::Data<AppState> {
-        let state = app_state().await;
-        let mut schedule_lock = state.schedule.lock().unwrap();
-
-        *schedule_lock = Some(Schedule {
-            etag: "".to_string(),
-            fetched_at: Default::default(),
-            updated_at: Default::default(),
-            parsed_at: Default::default(),
-            data: test_result().unwrap(),
-        });
+        let state = new_app_state().await.unwrap();
 
         state.clone()
     }

src/utility/mod.rs

@@ -1,4 +1,2 @@
 pub mod jwt;
-pub mod error;
-pub mod hasher;
-pub mod mutex;
+pub mod telegram;

src/utility/mutex.rs

@@ -1,77 +0,0 @@
-use std::ops::DerefMut;
-use std::sync::Mutex;
-
-pub trait MutexScope<T, ScopeFn, ScopeFnOutput>
-where
-    ScopeFn: FnOnce(&mut T) -> ScopeFnOutput,
-{
-    /// Replaces manually creating a mutex lock to perform operations on the data it manages.
-    ///
-    /// # Arguments
-    ///
-    /// * `f`: Function (mostly lambda) to which a reference to the mutable object stored in the mutex will be passed.
-    ///
-    /// returns: Return value of `f` function.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// let mtx: Mutex<i32> = Mutex::new(10);
-    ///
-    /// let res = mtx.scope(|x| { *x = *x * 2; *x });
-    /// assert_eq!(res, *mtx.lock().unwrap());
-    /// ```
-    fn scope(&self, f: ScopeFn) -> ScopeFnOutput;
-}
-
-impl<T, ScopeFn, ScopeFnOutput> MutexScope<T, ScopeFn, ScopeFnOutput> for Mutex<T>
-where
-    ScopeFn: FnOnce(&mut T) -> ScopeFnOutput,
-{
-    fn scope(&self, f: ScopeFn) -> ScopeFnOutput {
-        let mut lock = self.lock().unwrap();
-        let inner = lock.deref_mut();
-
-        f(inner)
-    }
-}
-
-pub trait MutexScopeAsync<T> {
-    /// ## Asynchronous variant of [MutexScope::scope][MutexScope::scope].
-    ///
-    /// Replaces manually creating a mutex lock to perform operations on the data it manages.
-    ///
-    /// # Arguments
-    ///
-    /// * `f`: Asynchronous function (mostly lambda) to which a reference to the mutable object stored in the mutex will be passed.
-    ///
-    /// returns: Return value of `f` function.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// let mtx: Mutex<i32> = Mutex::new(10);
-    ///
-    /// let res = mtx.async_scope(async |x| { *x = *x * 2; *x }).await;
-    /// assert_eq!(res, *mtx.lock().unwrap());
-    /// ```
-    async fn async_scope<'a, F, FnFut, FnOut>(&'a self, f: F) -> FnOut
-    where
-        FnFut: Future<Output = FnOut>,
-        F: FnOnce(&'a mut T) -> FnFut,
-        T: 'a;
-}
-
-impl<T> MutexScopeAsync<T> for Mutex<T> {
-    async fn async_scope<'a, F, FnFut, FnOut>(&'a self, f: F) -> FnOut
-    where
-        FnFut: Future<Output = FnOut>,
-        F: FnOnce(&'a mut T) -> FnFut,
-        T: 'a,
-    {
-        let mut guard = self.lock().unwrap();
-
-        let ptr: &'a mut T = unsafe { &mut *(guard.deref_mut() as *mut _) };
-        f(ptr).await
-    }
-}

src/utility/telegram.rs

@@ -0,0 +1,91 @@
+use base64::Engine;
+use derive_more::{Display, Error};
+use ed25519_dalek::Verifier;
+use hex_literal::hex;
+use serde::Deserialize;
+use std::collections::HashMap;
+
+pub struct WebAppInitDataMap {
+    pub data_map: HashMap<String, String>,
+}
+
+#[derive(Deserialize)]
+pub struct WebAppUser {
+    pub id: i64,
+}
+
+#[derive(Clone, Debug, Display, Error)]
+pub enum VerifyError {
+    #[display("No signature found.")]
+    NoSignature,
+
+    #[display("The provided signature was corrupted.")]
+    BadSignature,
+
+    #[display("The expected signature does not match the actual one.")]
+    IntegrityCheckFailed,
+}
+
+impl WebAppInitDataMap {
+    pub fn from_str(data: String) -> Self {
+        let mut this = Self {
+            data_map: HashMap::new(),
+        };
+
+        data.split('&')
+            .map(|kv| kv.split_once('=').unwrap_or_else(|| (kv, "")))
+            .for_each(|(key, value)| {
+                this.data_map.insert(key.to_string(), value.to_string());
+            });
+
+        if let Some(user) = this.data_map.get_mut("user") {
+            *user = percent_encoding::percent_decode_str(&*user)
+                .decode_utf8_lossy()
+                .to_string();
+        }
+
+        this
+    }
+
+    pub fn verify(&self, bot_id: i64, test_dc: bool) -> Result<(), VerifyError> {
+        //noinspection ALL
+        const TELEGRAM_PUBLIC_KEY: [[u8; 32]; 2] = [
+            hex!("e7bf03a2fa4602af4580703d88dda5bb59f32ed8b02a56c187fe7d34caed242d"),
+            hex!("40055058a4ee38156a06562e52eece92a771bcd8346a8c4615cb7376eddf72ec"),
+        ];
+
+        let verifying_key = ed25519_dalek::VerifyingKey::from_bytes(
+            &TELEGRAM_PUBLIC_KEY[if test_dc { 1 } else { 0 }],
+        )
+        .unwrap();
+
+        let signature = {
+            let raw = self
+                .data_map
+                .get("signature")
+                .ok_or(VerifyError::NoSignature)?;
+
+            let bytes = base64::prelude::BASE64_URL_SAFE_NO_PAD
+                .decode(raw)
+                .map_err(|_| VerifyError::BadSignature)?;
+
+            ed25519_dalek::Signature::from_slice(bytes.as_slice())
+                .map_err(|_| VerifyError::BadSignature)?
+        };
+
+        let data_check_string = format!("{}:WebAppData\n{}", bot_id, {
+            let mut vec = self
+                .data_map
+                .iter()
+                .filter(|(key, _)| !["hash", "signature"].iter().any(|variant| variant == key))
+                .map(|(key, value)| format!("{}={}", key, value))
+                .collect::<Vec<String>>();
+            vec.sort();
+            vec.join("\n")
+        });
+
+        verifying_key
+            .verify(data_check_string.as_bytes(), &signature)
+            .map_err(|_| VerifyError::IntegrityCheckFailed)
+    }
+}

src/xls_downloader/basic_impl.rs

@@ -1,219 +0,0 @@
-use crate::xls_downloader::interface::{FetchError, FetchOk, FetchResult, XLSDownloader};
-use chrono::{DateTime, Utc};
-
-pub struct BasicXlsDownloader {
-    pub url: Option<String>,
-}
-
-async fn fetch_specified(url: &String, user_agent: String, head: bool) -> FetchResult {
-    let client = reqwest::Client::new();
-
-    let response = if head {
-        client.head(url)
-    } else {
-        client.get(url)
-    }
-    .header("User-Agent", user_agent)
-    .send()
-    .await;
-
-    match response {
-        Ok(r) => {
-            if r.status().as_u16() != 200 {
-                return Err(FetchError::BadStatusCode);
-            }
-
-            let headers = r.headers();
-
-            let content_type = headers.get("Content-Type");
-            let etag = headers.get("etag");
-            let last_modified = headers.get("last-modified");
-            let date = headers.get("date");
-
-            if content_type.is_none() || etag.is_none() || last_modified.is_none() || date.is_none()
-            {
-                Err(FetchError::BadHeaders)
-            } else if content_type.unwrap() != "application/vnd.ms-excel" {
-                Err(FetchError::BadContentType)
-            } else {
-                let etag = etag.unwrap().to_str().unwrap().to_string();
-                let last_modified =
-                    DateTime::parse_from_rfc2822(&last_modified.unwrap().to_str().unwrap())
-                        .unwrap()
-                        .with_timezone(&Utc);
-
-                Ok(if head {
-                    FetchOk::head(etag, last_modified)
-                } else {
-                    FetchOk::get(etag, last_modified, r.bytes().await.unwrap().to_vec())
-                })
-            }
-        }
-        Err(_) => Err(FetchError::Unknown),
-    }
-}
-
-impl BasicXlsDownloader {
-    pub fn new() -> Self {
-        BasicXlsDownloader { url: None }
-    }
-}
-
-impl XLSDownloader for BasicXlsDownloader {
-    async fn fetch(&self, head: bool) -> FetchResult {
-        if self.url.is_none() {
-            Err(FetchError::NoUrlProvided)
-        } else {
-            fetch_specified(
-                self.url.as_ref().unwrap(),
-                "t.me/polytechnic_next".to_string(),
-                head,
-            )
-            .await
-        }
-    }
-
-    async fn set_url(&mut self, url: String) -> FetchResult {
-        let result = fetch_specified(&url, "t.me/polytechnic_next".to_string(), true).await;
-
-        if let Ok(_) = result {
-            self.url = Some(url);
-        }
-
-        result
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use crate::xls_downloader::basic_impl::{BasicXlsDownloader, fetch_specified};
-    use crate::xls_downloader::interface::{FetchError, XLSDownloader};
-
-    #[tokio::test]
-    async fn bad_url() {
-        let url = "bad_url".to_string();
-        let user_agent = String::new();
-
-        let results = [
-            fetch_specified(&url, user_agent.clone(), true).await,
-            fetch_specified(&url, user_agent.clone(), false).await,
-        ];
-
-        assert!(results[0].is_err());
-        assert!(results[1].is_err());
-    }
-
-    #[tokio::test]
-    async fn bad_status_code() {
-        let url = "https://www.google.com/not-found".to_string();
-        let user_agent = String::new();
-
-        let results = [
-            fetch_specified(&url, user_agent.clone(), true).await,
-            fetch_specified(&url, user_agent.clone(), false).await,
-        ];
-
-        assert!(results[0].is_err());
-        assert!(results[1].is_err());
-
-        assert_eq!(
-            *results[0].as_ref().err().unwrap(),
-            FetchError::BadStatusCode
-        );
-        assert_eq!(
-            *results[1].as_ref().err().unwrap(),
-            FetchError::BadStatusCode
-        );
-    }
-
-    #[tokio::test]
-    async fn bad_headers() {
-        let url = "https://www.google.com/favicon.ico".to_string();
-        let user_agent = String::new();
-
-        let results = [
-            fetch_specified(&url, user_agent.clone(), true).await,
-            fetch_specified(&url, user_agent.clone(), false).await,
-        ];
-
-        assert!(results[0].is_err());
-        assert!(results[1].is_err());
-
-        assert_eq!(*results[0].as_ref().err().unwrap(), FetchError::BadHeaders);
-        assert_eq!(*results[1].as_ref().err().unwrap(), FetchError::BadHeaders);
-    }
-
-    #[tokio::test]
-    async fn bad_content_type() {
-        let url = "https://s3.aero-storage.ldragol.ru/679e5d1145a6ad00843ad3f1/67ddb59fd46303008396ac96%2Fexample.txt".to_string();
-        let user_agent = String::new();
-
-        let results = [
-            fetch_specified(&url, user_agent.clone(), true).await,
-            fetch_specified(&url, user_agent.clone(), false).await,
-        ];
-
-        assert!(results[0].is_err());
-        assert!(results[1].is_err());
-
-        assert_eq!(
-            *results[0].as_ref().err().unwrap(),
-            FetchError::BadContentType
-        );
-        assert_eq!(
-            *results[1].as_ref().err().unwrap(),
-            FetchError::BadContentType
-        );
-    }
-
-    #[tokio::test]
-    async fn ok() {
-        let url = "https://s3.aero-storage.ldragol.ru/679e5d1145a6ad00843ad3f1/67ddb5fad46303008396ac97%2Fschedule.xls".to_string();
-        let user_agent = String::new();
-
-        let results = [
-            fetch_specified(&url, user_agent.clone(), true).await,
-            fetch_specified(&url, user_agent.clone(), false).await,
-        ];
-
-        assert!(results[0].is_ok());
-        assert!(results[1].is_ok());
-    }
-
-    #[tokio::test]
-    async fn downloader_set_ok() {
-        let url = "https://s3.aero-storage.ldragol.ru/679e5d1145a6ad00843ad3f1/67ddb5fad46303008396ac97%2Fschedule.xls".to_string();
-
-        let mut downloader = BasicXlsDownloader::new();
-
-        assert!(downloader.set_url(url).await.is_ok());
-    }
-
-    #[tokio::test]
-    async fn downloader_set_err() {
-        let url = "bad_url".to_string();
-
-        let mut downloader = BasicXlsDownloader::new();
-
-        assert!(downloader.set_url(url).await.is_err());
-    }
-
-    #[tokio::test]
-    async fn downloader_ok() {
-        let url = "https://s3.aero-storage.ldragol.ru/679e5d1145a6ad00843ad3f1/67ddb5fad46303008396ac97%2Fschedule.xls".to_string();
-
-        let mut downloader = BasicXlsDownloader::new();
-
-        assert!(downloader.set_url(url).await.is_ok());
-        assert!(downloader.fetch(false).await.is_ok());
-    }
-
-    #[tokio::test]
-    async fn downloader_no_url_provided() {
-        let downloader = BasicXlsDownloader::new();
-        let result = downloader.fetch(false).await;
-
-        assert!(result.is_err());
-        assert_eq!(result.err().unwrap(), FetchError::NoUrlProvided);
-    }
-}

src/xls_downloader/interface.rs

@@ -1,67 +0,0 @@
-use chrono::{DateTime, Utc};
-
-/// XLS data retrieval errors.
-#[derive(PartialEq, Debug)]
-pub enum FetchError {
-    /// File url is not set.
-    NoUrlProvided,
-
-    /// Unknown error.
-    Unknown,
-
-    /// Server returned a status code different from 200.
-    BadStatusCode,
-
-    /// The url leads to a file of a different type.
-    BadContentType,
-
-    /// Server doesn't return expected headers.
-    BadHeaders,
-}
-
-/// Result of XLS data retrieval.
-pub struct FetchOk {
-    /// ETag object.
-    pub etag: String,
-
-    /// File upload date.
-    pub uploaded_at: DateTime<Utc>,
-
-    /// Date data received.
-    pub requested_at: DateTime<Utc>,
-
-    /// File data.
-    pub data: Option<Vec<u8>>,
-}
-
-impl FetchOk {
-    /// Result without file content.
-    pub fn head(etag: String, uploaded_at: DateTime<Utc>) -> Self {
-        FetchOk {
-            etag,
-            uploaded_at,
-            requested_at: Utc::now(),
-            data: None,
-        }
-    }
-
-    /// Full result.
-    pub fn get(etag: String, uploaded_at: DateTime<Utc>, data: Vec<u8>) -> Self {
-        FetchOk {
-            etag,
-            uploaded_at,
-            requested_at: Utc::now(),
-            data: Some(data),
-        }
-    }
-}
-
-pub type FetchResult = Result<FetchOk, FetchError>;
-
-pub trait XLSDownloader {
-    /// Get data about the file, and optionally its content.
-    async fn fetch(&self, head: bool) -> FetchResult;
-
-    /// Setting the file link.
-    async fn set_url(&mut self, url: String) -> FetchResult;
-}

src/xls_downloader/mod.rs

@@ -1,2 +0,0 @@
-pub mod basic_impl;
-pub mod interface;