chore(ci): remove creating .env.test

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

@@ -40,7 +40,6 @@ jobs:
 
       - name: Test
         run: |
-          touch .env.test
           cargo test --verbose
         env:
           DATABASE_URL: ${{ env.TEST_DB }}

.idea/schedule-parser-rusted.iml

@@ -8,6 +8,9 @@
       <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

@@ -1,5 +1,5 @@
 [workspace]
-members = ["actix-macros", "actix-test", "schedule-parser"]
+members = ["actix-macros", "actix-test", "providers"]
 
 [package]
 name = "schedule-parser-rusted"
@@ -11,40 +11,65 @@ publish = false
 debug = true
 
 [dependencies]
-actix-web = "4.10.2"
+providers = { path = "providers" }
 actix-macros = { path = "actix-macros" }
-schedule-parser = { path = "schedule-parser", features = ["test-utils"] }
+
-bcrypt = "0.17.0"
+# serve api
+actix-web = "4"
+
+# basic
 chrono = { version = "0.4.40", features = ["serde"] }
 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"
+
+# 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"
+
+# schedule downloader
 reqwest = { version = "0.12.15", features = ["json"] }
-sentry = "0.38"
+mime = "0.3.17"
-sentry-actix = "0.38"
+
+# 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"
-sha1 = "0.11.0-pre.5"
+
-tokio = { version = "1.44.1", features = ["macros", "rt-multi-thread"] }
+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"] }
+
-ed25519-dalek = "2.1.1"
+uuid = { version = "1", features = ["v4"] }
-hex-literal = "1.0.0"
+hex-literal = "1"
-log = "0.4.26"
+log = "0.4"
-base64 = "0.22.1"
+
-percent-encoding = "2.3.1"
+# telegram webdata deciding and verify
-ua_generator = "0.5.16"
+base64 = "0.22"
+percent-encoding = "2.3"
+ed25519-dalek = "2"
 
 [dev-dependencies]
+providers = { path = "providers", features = ["test"] }
 actix-test = { path = "actix-test" }

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"
+syn = "2"
-quote = "1.0.40"
+quote = "1"
-proc-macro2 = "1.0.94"
+proc-macro2 = "1"
 
 [lib]
 proc-macro = true

actix-macros/src/lib.rs

@@ -81,7 +81,7 @@ mod middleware_error {
 
                 fn error_response(&self) -> ::actix_web::HttpResponse<BoxBody> {
                     ::actix_web::HttpResponse::build(self.status_code())
-                        .json(crate::utility::error::MiddlewareError::new(self.clone()))
+                        .json(crate::middlewares::error::MiddlewareError::new(self.clone()))
                 }
             }
         })

actix-test/Cargo.toml

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

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 = { git = "https://github.com/prophittcorey/calamine.git", branch = "fix/zip-3.0" }
+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/mod.rs

@@ -1,12 +1,12 @@
-use crate::LessonParseResult::{Lessons, Street};
+use crate::or_continue;
-use crate::schema::LessonType::Break;
+use crate::parser::error::{ErrorCell, ErrorCellPos};
-use crate::schema::internal::{BoundariesCellInfo, DayCellInfo, GroupCellInfo};
+use crate::parser::worksheet::WorkSheet;
-use crate::schema::{
+use crate::parser::LessonParseResult::{Lessons, Street};
-    Day, ErrorCell, ErrorCellPos, Lesson, LessonBoundaries, LessonSubGroup, LessonType, ParseError,
+use base::LessonType::Break;
-    ParseResult, ScheduleEntry,
+use base::{
+    Day, Lesson, LessonBoundaries, LessonSubGroup, LessonType, ParsedSchedule, ScheduleEntry,
 };
-use crate::worksheet::WorkSheet;
+use calamine::{open_workbook_from_rs, Reader, Xls};
-use calamine::{Reader, Xls, open_workbook_from_rs};
 use chrono::{DateTime, Duration, NaiveDate, NaiveTime, Utc};
 use regex::Regex;
 use std::collections::HashMap;
@@ -14,18 +14,128 @@ use std::io::Cursor;
 use std::sync::LazyLock;
 
 mod macros;
-pub mod schema;
 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>), ParseError> {
+) -> 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(ParseError::UnknownWorkSheetRange)?;
+    let worksheet_start = worksheet
-    let worksheet_end = worksheet.end().ok_or(ParseError::UnknownWorkSheetRange)?;
+        .start()
+        .ok_or(error::Error::UnknownWorkSheetRange)?;
+    let worksheet_end = worksheet.end().ok_or(error::Error::UnknownWorkSheetRange)?;
 
     let mut row = worksheet_start.0;
 
@@ -42,7 +152,8 @@ fn parse_skeleton(
             for column in (worksheet_start.1 + 2)..=worksheet_end.1 {
                 groups.push(GroupCellInfo {
                     column,
-                    name: or_continue!(worksheet.get_string_from_cell(row, column)),
+                    name: or_continue!(worksheet.get_string_from_cell(row, column))
+                        .replace(" ", ""),
                 });
             }
 
@@ -152,7 +263,7 @@ fn parse_lesson(
     day_boundaries: &Vec<BoundariesCellInfo>,
     lesson_boundaries: &BoundariesCellInfo,
     group_column: u32,
-) -> Result<LessonParseResult, ParseError> {
+) -> Result<LessonParseResult, crate::parser::error::Error> {
     let row = lesson_boundaries.xls_range.0.0;
 
     let name = {
@@ -179,13 +290,12 @@ fn parse_lesson(
             .filter(|time| time.xls_range.1.0 == cell_range.1.0)
             .collect::<Vec<&BoundariesCellInfo>>();
 
-        let end_time =
+        let end_time = end_time_arr
-            end_time_arr
+            .first()
-                .first()
+            .ok_or(error::Error::LessonTimeNotFound(ErrorCellPos {
-                .ok_or(ParseError::LessonTimeNotFound(ErrorCellPos {
+                row,
-                    row,
+                column: group_column,
-                    column: group_column,
+            }))?;
-                }))?;
 
         let range: Option<[u8; 2]> = if lesson_boundaries.default_index != None {
             let default = lesson_boundaries.default_index.unwrap() as u8;
@@ -310,7 +420,8 @@ fn parse_cabinets(worksheet: &WorkSheet, row_range: (u32, u32), column: u32) ->
 /// 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>), ParseError> {
+) -> Result<(String, Vec<Option<LessonSubGroup>>, Option<LessonType>), crate::parser::error::Error>
+{
     // Части названия пары:
     // 1. Само название.
     // 2. Список преподавателей и подгрупп.
@@ -486,7 +597,7 @@ fn parse_day_boundaries(
     date: DateTime<Utc>,
     row_range: (u32, u32),
     column: u32,
-) -> Result<Vec<BoundariesCellInfo>, ParseError> {
+) -> Result<Vec<BoundariesCellInfo>, crate::parser::error::Error> {
     let mut day_times: Vec<BoundariesCellInfo> = Vec::new();
 
     for row in row_range.0..row_range.1 {
@@ -497,7 +608,7 @@ fn parse_day_boundaries(
         };
 
         let lesson_time = parse_lesson_boundaries_cell(&time_cell, date.clone()).ok_or(
-            ParseError::LessonBoundaries(ErrorCell::new(row, column, time_cell.clone())),
+            error::Error::LessonBoundaries(ErrorCell::new(row, column, time_cell.clone())),
         )?;
 
         // type
@@ -542,7 +653,7 @@ fn parse_day_boundaries(
 fn parse_week_boundaries(
     worksheet: &WorkSheet,
     week_markup: &Vec<DayCellInfo>,
-) -> Result<Vec<Vec<BoundariesCellInfo>>, ParseError> {
+) -> Result<Vec<Vec<BoundariesCellInfo>>, crate::parser::error::Error> {
     let mut result: Vec<Vec<BoundariesCellInfo>> = Vec::new();
 
     let worksheet_end_row = worksheet.end().unwrap().0;
@@ -662,7 +773,7 @@ fn convert_groups_to_teachers(
 ///
 /// * `buffer`: XLS data containing schedule.
 ///
-/// returns: Result<ParseResult, ParseError>
+/// returns: Result<ParseResult, crate::parser::error::Error>
 ///
 /// # Examples
 ///
@@ -676,21 +787,21 @@ fn convert_groups_to_teachers(
 /// 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> {
+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| ParseError::BadXLS(std::sync::Arc::new(e)))?;
+        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(ParseError::NoWorkSheets)?
+            .ok_or(error::Error::NoWorkSheets)?
             .clone();
 
         let worksheet_merges = workbook
             .worksheet_merge_cells(&*worksheet_name)
-            .ok_or(ParseError::NoWorkSheets)?;
+            .ok_or(error::Error::NoWorkSheets)?;
 
         WorkSheet {
             data: worksheet,
@@ -740,18 +851,19 @@ pub fn parse_xls(buffer: &Vec<u8>) -> Result<ParseResult, ParseError> {
         groups.insert(group.name.clone(), group);
     }
 
-    Ok(ParseResult {
+    Ok(ParsedSchedule {
         teachers: convert_groups_to_teachers(&groups),
         groups,
     })
 }
 
-#[cfg(any(test, feature = "test-utils"))]
+#[cfg(any(test, feature = "test"))]
 pub mod test_utils {
     use super::*;
+    use base::ParsedSchedule;
 
-    pub fn test_result() -> Result<ParseResult, ParseError> {
+    pub fn test_result() -> Result<ParsedSchedule, crate::parser::error::Error> {
-        parse_xls(&include_bytes!("../../schedule.xls").to_vec())
+        parse_xls(&include_bytes!("../../../../test-data/engels-polytechnic.xls").to_vec())
     }
 }
 

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;
+}

schedule-parser/Cargo.toml

@@ -1,26 +0,0 @@
-[package]
-name = "schedule-parser"
-version = "0.1.0"
-edition = "2024"
-
-[features]
-test-utils = []
-
-[dependencies]
-calamine = "0.26"
-chrono = { version = "0.4", features = ["serde"] }
-derive_more = { version = "2", features = ["full"] }
-sentry = "0.38"
-serde = { version = "1.0.219", features = ["derive"] }
-serde_repr = "0.1.20"
-regex = "1.11.1"
-utoipa = { version = "5", features = ["chrono"] }
-strsim = "0.11.1"
-log = "0.4.26"
-
-[dev-dependencies]
-criterion = "0.6"
-
-[[bench]]
-name = "parse"
-harness = false

schedule-parser/benches/parse.rs

@@ -1,12 +0,0 @@
-use criterion::{Criterion, criterion_group, criterion_main};
-
-use schedule_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);

schedule-parser/src/schema.rs

@@ -1,227 +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;
-
-pub(crate) mod internal {
-    use crate::schema::{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 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 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"),
-        }
-    }
-}

src/database/driver.rs

@@ -4,7 +4,7 @@ pub mod users {
     use crate::database::schema::users::dsl::*;
     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;
@@ -146,19 +146,3 @@ pub mod users {
             .execute(state.get_database().await.deref_mut())
     }
 }
-
-pub mod fcm {
-    use crate::database::models::{FCM, User};
-    use crate::state::AppState;
-    use actix_web::web;
-    use diesel::QueryDsl;
-    use diesel::RunQueryDsl;
-    use diesel::{BelongingToDsl, QueryResult, SelectableHelper};
-    use std::ops::DerefMut;
-
-    pub async fn from_user(state: &web::Data<AppState>, user: &User) -> QueryResult<FCM> {
-        FCM::belonging_to(&user)
-            .select(FCM::as_select())
-            .get_result(state.get_database().await.deref_mut())
-    }
-}

src/extractors/authorized_user.rs

@@ -1,13 +1,13 @@
 use crate::database::driver;
-use crate::database::models::{FCM, User};
+use crate::database::models::User;
-use crate::extractors::base::{AsyncExtractor, FromRequestAsync};
+use crate::extractors::base::FromRequestAsync;
 use crate::state::AppState;
 use crate::utility::jwt;
 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;
@@ -95,48 +95,3 @@ impl FromRequestAsync for User {
             .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> FromRequestAsync for UserExtractor<{ FCM }> {
-    type Error = actix_web::Error;
-
-    async fn from_request_async(
-        req: &HttpRequest,
-        payload: &mut Payload,
-    ) -> Result<Self, Self::Error> {
-        let user = AsyncExtractor::<User>::from_request(req, payload)
-            .await?
-            .into_inner();
-
-        let app_state = req.app_data::<web::Data<AppState>>().unwrap();
-
-        Ok(Self {
-            fcm: if FCM {
-                driver::fcm::from_user(&app_state, &user).await.ok()
-            } else {
-                None
-            },
-            user,
-        })
-    }
-}

src/main.rs

@@ -1,21 +1,19 @@
 use crate::middlewares::authorization::JWTAuthorization;
 use crate::middlewares::content_type::ContentTypeBootstrap;
-use crate::state::{AppState, new_app_state};
+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 state;
 
 mod database;
 
-mod xls_downloader;
-
 mod extractors;
 mod middlewares;
 mod routes;
@@ -53,11 +51,6 @@ pub fn get_api_scope<
         .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"],
@@ -72,7 +65,6 @@ pub fn get_api_scope<
         .service(auth_scope)
         .service(users_scope)
         .service(schedule_scope)
-        .service(fcm_scope)
         .service(flow_scope)
         .service(vk_id_scope)
 }

src/middlewares/mod.rs

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

src/routes/auth/sign_up.rs

@@ -18,8 +18,9 @@ async fn sign_up_combined(
     }
 
     if !app_state
-        .get_schedule_snapshot()
+        .get_schedule_snapshot("eng_polytechnic")
         .await
+        .unwrap()
         .data
         .groups
         .contains_key(&data.group)

src/routes/fcm/mod.rs

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

src/routes/fcm/set_token.rs

@@ -1,94 +0,0 @@
-use crate::database;
-use crate::database::models::FCM;
-use crate::extractors::authorized_user::UserExtractor;
-use crate::extractors::base::AsyncExtractor;
-use crate::state::AppState;
-use actix_web::{HttpResponse, Responder, patch, web};
-use diesel::{RunQueryDsl, SaveChangesDsl};
-use firebase_messaging_rs::topic::TopicManagementSupport;
-use serde::Deserialize;
-use std::ops::DerefMut;
-
-#[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 diesel::insert_into(database::schema::fcm::table)
-                .values(&fcm)
-                .execute(app_state.get_database().await.deref_mut())
-            {
-                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: AsyncExtractor<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()));
-    }
-
-    fcm.save_changes::<FCM>(app_state.get_database().await.deref_mut())
-        .unwrap();
-
-    let fcm_client = app_state.get_fcm_client().await.unwrap();
-
-    for topic in fcm.topics.clone() {
-        if let Some(topic) = topic {
-            if let Err(error) = fcm_client
-                .register_token_to_topic(&*topic, &*fcm.token)
-                .await
-            {
-                eprintln!("Failed to subscribe token to topic: {:?}", error);
-                return HttpResponse::Ok();
-            }
-        }
-    }
-
-    HttpResponse::Ok()
-}

src/routes/fcm/update_callback.rs

@@ -1,24 +0,0 @@
-use crate::database::driver::users::UserSave;
-use crate::database::models::User;
-use crate::extractors::base::AsyncExtractor;
-use crate::state::AppState;
-use actix_web::{HttpResponse, Responder, post, web};
-
-#[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: AsyncExtractor<User>,
-) -> impl Responder {
-    let mut user = user.into_inner();
-
-    user.android_version = Some(version.into_inner());
-
-    user.save(&app_state).await.unwrap();
-
-    HttpResponse::Ok()
-}

src/routes/flow/telegram_complete.rs

@@ -40,8 +40,9 @@ pub async fn telegram_complete(
 
     // проверка на существование группы
     if !app_state
-        .get_schedule_snapshot()
+        .get_schedule_snapshot("eng_polytechnic")
         .await
+        .unwrap()
         .data
         .groups
         .contains_key(&data.group)

src/routes/mod.rs

@@ -1,5 +1,4 @@
 pub mod auth;
-pub mod fcm;
 pub mod flow;
 pub mod schedule;
 mod schema;

src/routes/schedule/group.rs

@@ -31,8 +31,9 @@ pub async fn group(user: AsyncExtractor<User>, app_state: web::Data<AppState>) -
         None => Err(ErrorCode::SignUpNotCompleted),
 
         Some(group) => match app_state
-            .get_schedule_snapshot()
+            .get_schedule_snapshot("eng_polytechnic")
             .await
+            .unwrap()
             .data
             .groups
             .get(group)

src/routes/schedule/group_names.rs

@@ -6,8 +6,9 @@ use actix_web::{get, web};
 #[get("/group-names")]
 pub async fn group_names(app_state: web::Data<AppState>) -> Response {
     let mut names: Vec<String> = app_state
-        .get_schedule_snapshot()
+        .get_schedule_snapshot("eng_polytechnic")
         .await
+        .unwrap()
         .data
         .groups
         .keys()

src/routes/schedule/schema.rs

@@ -1,7 +1,7 @@
-use crate::state::{AppState, ScheduleSnapshot};
+use crate::state::AppState;
 use actix_macros::{OkResponse, ResponderJson};
 use actix_web::web;
-use schedule_parser::schema::ScheduleEntry;
+use providers::base::{ScheduleEntry, ScheduleSnapshot};
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use std::ops::Deref;
@@ -32,7 +32,12 @@ impl From<ScheduleEntry> for ScheduleEntryResponse {
 
 impl ScheduleView {
     pub async fn from(app_state: &web::Data<AppState>) -> Self {
-        let schedule = app_state.get_schedule_snapshot().await.clone();
+        let schedule = app_state
+            .get_schedule_snapshot("eng_polytechnic")
+            .await
+            .unwrap()
+            .deref()
+            .clone();
 
         Self {
             url: schedule.url,
@@ -60,7 +65,13 @@ pub struct CacheStatus {
 
 impl CacheStatus {
     pub async fn from(value: &web::Data<AppState>) -> Self {
-        From::<&ScheduleSnapshot>::from(value.get_schedule_snapshot().await.deref())
+        From::<&ScheduleSnapshot>::from(
+            value
+                .get_schedule_snapshot("eng_polytechnic")
+                .await
+                .unwrap()
+                .deref(),
+        )
     }
 }
 

src/routes/schedule/teacher.rs

@@ -2,7 +2,7 @@ use self::schema::*;
 use crate::AppState;
 use crate::routes::schema::ResponseError;
 use actix_web::{get, web};
-use schedule_parser::schema::ScheduleEntry;
+use providers::base::ScheduleEntry;
 
 #[utoipa::path(responses(
     (status = OK, body = ScheduleEntry),
@@ -18,8 +18,9 @@ use schedule_parser::schema::ScheduleEntry;
 #[get("/teacher/{name}")]
 pub async fn teacher(name: web::Path<String>, app_state: web::Data<AppState>) -> ServiceResponse {
     match app_state
-        .get_schedule_snapshot()
+        .get_schedule_snapshot("eng_polytechnic")
         .await
+        .unwrap()
         .data
         .teachers
         .get(&name.into_inner())

src/routes/schedule/teacher_names.rs

@@ -6,8 +6,9 @@ use actix_web::{get, web};
 #[get("/teacher-names")]
 pub async fn teacher_names(app_state: web::Data<AppState>) -> Response {
     let mut names: Vec<String> = app_state
-        .get_schedule_snapshot()
+        .get_schedule_snapshot("eng_polytechnic")
         .await
+        .unwrap()
         .data
         .teachers
         .keys()

src/routes/schema.rs

@@ -131,7 +131,7 @@ pub mod user {
     use serde::Serialize;
 
     //noinspection SpellCheckingInspection
-    /// Используется для скрытия чувствительных полей, таких как хеш пароля или FCM
+    /// Используется для скрытия чувствительных полей, таких как хеш пароля
     #[derive(Serialize, utoipa::ToSchema, ResponderJson, OkResponse)]
     #[serde(rename_all = "camelCase")]
     pub struct UserResponse {

src/routes/users/change_group.rs

@@ -19,8 +19,9 @@ pub async fn change_group(
     }
 
     if !app_state
-        .get_schedule_snapshot()
+        .get_schedule_snapshot("eng_polytechnic")
         .await
+        .unwrap()
         .data
         .groups
         .contains_key(&data.group)

src/state/env/mod.rs

@@ -1,11 +1,15 @@
 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)]
@@ -13,5 +17,7 @@ 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

@@ -2,6 +2,7 @@ use std::env;
 
 #[derive(Clone)]
 pub struct ScheduleEnvData {
+    #[cfg(not(test))]
     pub url: Option<String>,
     pub auto_update: bool,
 }
@@ -9,6 +10,7 @@ pub struct ScheduleEnvData {
 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/fcm_client.rs

@@ -1,15 +0,0 @@
-use firebase_messaging_rs::FCMClient;
-use std::env;
-use tokio::sync::Mutex;
-
-#[derive(Clone)]
-pub struct FCMClientData;
-
-impl FCMClientData {
-    pub async fn new() -> Option<Mutex<FCMClient>> {
-        match env::var("GOOGLE_APPLICATION_CREDENTIALS") {
-            Ok(_) => Some(Mutex::new(FCMClient::new().await.unwrap())),
-            Err(_) => None,
-        }
-    }
-}

src/state/mod.rs

@@ -1,69 +1,83 @@
 mod env;
-mod fcm_client;
-mod schedule;
 
-use crate::state::fcm_client::FCMClientData;
+pub use crate::state::env::AppEnv;
-use crate::xls_downloader::basic_impl::BasicXlsDownloader;
 use actix_web::web;
 use diesel::{Connection, PgConnection};
-use firebase_messaging_rs::FCMClient;
+use providers::base::{ScheduleProvider, ScheduleSnapshot};
-use std::ops::DerefMut;
+use std::collections::HashMap;
-use tokio::sync::{MappedMutexGuard, Mutex, MutexGuard};
+use std::sync::Arc;
-
+use tokio::sync::{Mutex, MutexGuard};
-pub use self::schedule::{Schedule, ScheduleSnapshot};
+use tokio_util::sync::CancellationToken;
-pub use crate::state::env::AppEnv;
 
 /// Common data provided to endpoints.
 pub struct AppState {
+    cancel_token: CancellationToken,
     database: Mutex<PgConnection>,
-    downloader: Mutex<BasicXlsDownloader>,
+    providers: HashMap<String, Arc<dyn ScheduleProvider>>,
-    schedule: Mutex<Schedule>,
     env: AppEnv,
-    fcm_client: Option<Mutex<FCMClient>>,
 }
 
 impl AppState {
-    pub async fn new() -> Result<Self, self::schedule::Error> {
+    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 mut _self = Self {
+        let env = AppEnv::default();
-            downloader: Mutex::new(BasicXlsDownloader::new()),
+        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(),
+                    })
+                }
 
-            schedule: Mutex::new(Schedule::default()),
+                #[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: AppEnv::default(),
+            env,
-            fcm_client: FCMClientData::new().await,
+            providers,
         };
 
-        if _self.env.schedule.auto_update {
+        if this.env.schedule.auto_update {
-            _self
+            for (_, provider) in &this.providers {
-                .get_schedule()
+                let provider = provider.clone();
-                .await
+                let cancel_token = this.cancel_token.clone();
-                .init(_self.get_downloader().await.deref_mut(), &_self.env)
+
-                .await?;
+                tokio::spawn(async move { provider.start_auto_update_task(cancel_token).await });
+            }
         }
 
-        Ok(_self)
+        Ok(this)
     }
 
-    pub async fn get_downloader(&'_ self) -> MutexGuard<'_, BasicXlsDownloader> {
+    pub async fn get_schedule_snapshot(&'_ self, provider: &str) -> Option<Arc<ScheduleSnapshot>> {
-        self.downloader.lock().await
+        if let Some(provider) = self.providers.get(provider) {
-    }
+            return Some(provider.get_schedule().await);
+        }
 
-    pub async fn get_schedule(&'_ self) -> MutexGuard<'_, Schedule> {
+        None
-        self.schedule.lock().await
-    }
-
-    pub async fn get_schedule_snapshot(&'_ self) -> MappedMutexGuard<'_, ScheduleSnapshot> {
-        let snapshot =
-            MutexGuard::<'_, Schedule>::map(self.schedule.lock().await, |schedule| unsafe {
-                schedule.snapshot.assume_init_mut()
-            });
-
-        snapshot
     }
 
     pub async fn get_database(&'_ self) -> MutexGuard<'_, PgConnection> {
@@ -73,16 +87,9 @@ impl AppState {
     pub fn get_env(&self) -> &AppEnv {
         &self.env
     }
-
-    pub async fn get_fcm_client(&'_ self) -> Option<MutexGuard<'_, FCMClient>> {
-        match &self.fcm_client {
-            Some(client) => Some(client.lock().await),
-            None => None,
-        }
-    }
 }
 
 /// Create a new object web::Data<AppState>.
-pub async fn new_app_state() -> Result<web::Data<AppState>, self::schedule::Error> {
+pub async fn new_app_state() -> Result<web::Data<AppState>, Box<dyn std::error::Error>> {
     Ok(web::Data::new(AppState::new().await?))
 }

src/state/schedule.rs

@@ -1,290 +0,0 @@
-use crate::state::env::AppEnv;
-use crate::utility::hasher::DigestHasher;
-use chrono::{DateTime, Utc};
-use derive_more::{Display, Error};
-use schedule_parser::parse_xls;
-use schedule_parser::schema::{ParseError, ParseResult};
-use sha1::{Digest, Sha1};
-use std::hash::Hash;
-use std::mem::MaybeUninit;
-
-use crate::xls_downloader::basic_impl::BasicXlsDownloader;
-use crate::xls_downloader::interface::{FetchError, XLSDownloader};
-
-/// Represents errors that can occur during schedule-related operations.
-#[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(ParseError),
-}
-
-/// 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: ParseResult,
-}
-
-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();
-    }
-
-    /// 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(
-        downloader: &mut BasicXlsDownloader,
-        url: String,
-    ) -> Result<Self, 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,
-        })
-    }
-}
-
-pub struct Schedule {
-    pub snapshot: MaybeUninit<ScheduleSnapshot>,
-}
-
-impl Default for Schedule {
-    fn default() -> Self {
-        Self {
-            snapshot: MaybeUninit::uninit(),
-        }
-    }
-}
-
-impl Schedule {
-    /// 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 init(
-        &mut self,
-        downloader: &mut BasicXlsDownloader,
-        app_env: &AppEnv,
-    ) -> Result<(), Error> {
-        let url = if let Some(url) = &app_env.schedule.url {
-            log::info!("The default link {} will be used", url);
-            url.clone()
-        } else {
-            log::info!("Obtaining a link using FaaS...");
-            Self::query_url(
-                &*app_env.yandex_cloud.api_key,
-                &*app_env.yandex_cloud.func_id,
-            )
-            .await
-            .map_err(|error| Error::QueryUrlFailed(error))?
-        };
-
-        log::info!("For the initial setup, a link {} will be used", url);
-
-        let snapshot = ScheduleSnapshot::new(downloader, url)
-            .await
-            .map_err(|error| Error::SnapshotCreationFailed(error))?;
-
-        log::info!("Schedule snapshot successfully created!");
-
-        self.snapshot.write(snapshot);
-
-        Ok(())
-    }
-
-    /// 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
-    ///
-    /// Uses `unsafe` to access the initialized snapshot, guaranteed valid by prior `init()` call
-    #[allow(unused)] // TODO: сделать авто апдейт
-    pub async fn update(
-        &mut self,
-        downloader: &mut BasicXlsDownloader,
-        app_env: &AppEnv,
-    ) -> Result<(), Error> {
-        assert!(app_env.schedule.auto_update);
-
-        let url = Self::query_url(
-            &*app_env.yandex_cloud.api_key,
-            &*app_env.yandex_cloud.func_id,
-        )
-        .await
-        .map_err(|error| Error::QueryUrlFailed(error))?;
-
-        let snapshot = match ScheduleSnapshot::new(downloader, url).await {
-            Ok(snapshot) => snapshot,
-            Err(SnapshotCreationError::SameUrl) => {
-                unsafe { self.snapshot.assume_init_mut() }.update();
-                return Ok(());
-            }
-            Err(error) => return Err(Error::SnapshotCreationFailed(error)),
-        };
-
-        self.snapshot.write(snapshot);
-
-        Ok(())
-    }
-}

src/test_env.rs

@@ -1,33 +1,26 @@
 #[cfg(test)]
 pub(crate) mod tests {
-    use crate::state::{AppState, ScheduleSnapshot, new_app_state};
+    use crate::state::{new_app_state, AppState};
     use actix_web::web;
     use log::info;
-    use schedule_parser::test_utils::test_result;
-    use std::default::Default;
     use tokio::sync::OnceCell;
 
     pub fn test_env() {
         info!("Loading test environment file...");
-        dotenvy::from_path(".env.test").expect("Failed to load 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 = new_app_state().await.unwrap();
 
-        state.get_schedule().await.snapshot.write(ScheduleSnapshot {
-            fetched_at: Default::default(),
-            updated_at: Default::default(),
-            url: "".to_string(),
-            data: test_result().unwrap(),
-        });
-
         state.clone()
     }
 
     pub async fn static_app_state() -> web::Data<AppState> {
         static STATE: OnceCell<web::Data<AppState>> = OnceCell::const_new();
-
+        
         STATE.get_or_init(|| test_app_state()).await.clone()
     }
 }

src/utility/mod.rs

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

src/xls_downloader/basic_impl.rs

@@ -1,199 +0,0 @@
-use crate::xls_downloader::interface::{FetchError, FetchOk, FetchResult, XLSDownloader};
-use chrono::{DateTime, Utc};
-use std::sync::Arc;
-
-pub struct BasicXlsDownloader {
-    pub url: Option<String>,
-}
-
-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())
-    })
-}
-
-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(), head).await
-        }
-    }
-
-    async fn set_url(&mut self, url: &str) -> FetchResult {
-        let result = fetch_specified(url, true).await;
-
-        if let Ok(_) = result {
-            self.url = Some(url.to_string());
-        }
-
-        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";
-
-        let results = [
-            fetch_specified(url, true).await,
-            fetch_specified(url, 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";
-
-        let results = [
-            fetch_specified(url, true).await,
-            fetch_specified(url, false).await,
-        ];
-
-        assert!(results[0].is_err());
-        assert!(results[1].is_err());
-
-        let expected_error = FetchError::BadStatusCode { status_code: 404 };
-
-        assert_eq!(*results[0].as_ref().err().unwrap(), expected_error);
-        assert_eq!(*results[1].as_ref().err().unwrap(), expected_error);
-    }
-
-    #[tokio::test]
-    async fn bad_headers() {
-        let url = "https://www.google.com/favicon.ico";
-
-        let results = [
-            fetch_specified(url, true).await,
-            fetch_specified(url, false).await,
-        ];
-
-        assert!(results[0].is_err());
-        assert!(results[1].is_err());
-
-        let expected_error = FetchError::BadHeaders {
-            expected_header: "ETag".to_string(),
-        };
-
-        assert_eq!(*results[0].as_ref().err().unwrap(), expected_error);
-        assert_eq!(*results[1].as_ref().err().unwrap(), expected_error);
-    }
-
-    #[tokio::test]
-    async fn bad_content_type() {
-        let url = "https://s3.aero-storage.ldragol.ru/679e5d1145a6ad00843ad3f1/67ddb59fd46303008396ac96%2Fexample.txt";
-
-        let results = [
-            fetch_specified(url, true).await,
-            fetch_specified(url, false).await,
-        ];
-
-        assert!(results[0].is_err());
-        assert!(results[1].is_err());
-    }
-
-    #[tokio::test]
-    async fn ok() {
-        let url = "https://s3.aero-storage.ldragol.ru/679e5d1145a6ad00843ad3f1/67ddb5fad46303008396ac97%2Fschedule.xls";
-
-        let results = [
-            fetch_specified(url, true).await,
-            fetch_specified(url, 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";
-
-        let mut downloader = BasicXlsDownloader::new();
-
-        assert!(downloader.set_url(url).await.is_ok());
-    }
-
-    #[tokio::test]
-    async fn downloader_set_err() {
-        let url = "bad_url";
-
-        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";
-
-        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

@@ -1,100 +0,0 @@
-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.
-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 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: &str) -> FetchResult;
-}

src/xls_downloader/mod.rs

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