chore(release): bump version to 1.2.2

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

@@ -0,0 +1,173 @@
+name: release
+
+on:
+  push:
+    tags: [ "release/v*" ]
+
+permissions:
+  contents: write
+
+env:
+  CARGO_TERM_COLOR: always
+
+  BINARY_NAME: schedule-parser-rusted
+
+  TEST_DB: ${{ secrets.TEST_DATABASE_URL }}
+
+  SENTRY_AUTH_TOKEN: ${{ secrets.SENTRY_AUTH_TOKEN }}
+  SENTRY_ORG: ${{ secrets.SENTRY_ORG }}
+  SENTRY_PROJECT: ${{ secrets.SENTRY_PROJECT }}
+
+  DOCKER_IMAGE_NAME: ${{ github.repository }}
+
+  DOCKER_REGISTRY_HOST: registry.n08i40k.ru
+  DOCKER_REGISTRY_USERNAME: ${{ github.repository_owner }}
+  DOCKER_REGISTRY_PASSWORD: ${{ secrets.DOCKER_REGISTRY_PASSWORD }}
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Rust
+        uses: actions-rust-lang/setup-rust-toolchain@v1.11.0
+        with:
+          toolchain: stable
+
+      - name: Test
+        run: |
+          cargo test --verbose
+        env:
+          DATABASE_URL: ${{ env.TEST_DB }}
+          SCHEDULE_DISABLE_AUTO_UPDATE: 1
+          JWT_SECRET: "test-secret-at-least-256-bits-used"
+          VK_ID_CLIENT_ID: 0
+          VK_ID_REDIRECT_URI: "vk0://vk.com/blank.html"
+          TELEGRAM_BOT_ID: 0
+          TELEGRAM_MINI_APP_HOST: example.com
+          TELEGRAM_TEST_DC: false
+          YANDEX_CLOUD_API_KEY: ""
+          YANDEX_CLOUD_FUNC_ID: ""
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    needs: test
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Rust
+        uses: actions-rust-lang/setup-rust-toolchain@v1.11.0
+        with:
+          toolchain: stable
+
+      - name: Build
+        run: cargo build --release --verbose
+
+      - name: Extract debug symbols
+        run: |
+          objcopy --only-keep-debug target/release/${{ env.BINARY_NAME }}{,.d}
+          objcopy --strip-debug --strip-unneeded target/release/${{ env.BINARY_NAME }}
+          objcopy --add-gnu-debuglink target/release/${{ env.BINARY_NAME }}{.d,}
+
+      - name: Setup sentry-cli
+        uses: matbour/setup-sentry-cli@v2.0.0
+        with:
+          version: latest
+          token: ${{ env.SENTRY_AUTH_TOKEN }}
+          organization: ${{ env.SENTRY_ORG }}
+          project: ${{ env.SENTRY_PROJECT }}
+
+      - name: Upload debug symbols to Sentry
+        run: |
+          sentry-cli debug-files upload --include-sources .
+
+      - name: Upload build binary artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: release-binary
+          path: target/release/${{ env.BINARY_NAME }}
+
+      - name: Upload build debug symbols artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: release-symbols
+          path: target/release/${{ env.BINARY_NAME }}.d
+
+  docker:
+    name: Build & Push Docker Image
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: release-binary
+
+      - name: Setup Docker Buildx
+        uses: docker/setup-buildx-action@v3.10.0
+
+      - name: Login to Registry
+        uses: docker/login-action@v3.4.0
+        with:
+          registry: ${{ env.DOCKER_REGISTRY_HOST }}
+          username: ${{ env.DOCKER_REGISTRY_USERNAME }}
+          password: ${{ env.DOCKER_REGISTRY_PASSWORD }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5.7.0
+        with:
+          images: ${{ env.DOCKER_REGISTRY_HOST }}/${{ env.DOCKER_IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@v6.15.0
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          build-args: |
+            "BINARY_NAME=${{ env.BINARY_NAME }}"
+  release:
+    name: Create GitHub Release
+    runs-on: ubuntu-latest
+    needs:
+      - build
+      - docker
+    # noinspection GrazieInspection,SpellCheckingInspection
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Generate changelog
+        run: |
+          LAST_TAG=$(git describe --tags --abbrev=0 HEAD^)
+          echo "## Коммиты с прошлого релиза $LAST_TAG" > CHANGELOG.md
+          git log $LAST_TAG..HEAD --oneline >> CHANGELOG.md
+
+      - name: Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          pattern: release-*
+          merge-multiple: true
+
+      - name: Create Release
+        id: create_release
+        uses: ncipollo/release-action@v1.16.0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          artifacts: "${{ env.BINARY_NAME }},${{ env.BINARY_NAME }}.d"
+          bodyFile: CHANGELOG.md

.github/workflows/test.yml

@@ -1,10 +1,9 @@
-name: Tests
+name: cargo test
 
 on:
   push:
     branches: [ "master" ]
-  pull_request:
-    branches: [ "master" ]
+    tags-ignore: [ "release/v*" ]
 
 permissions:
   contents: read
@@ -19,7 +18,20 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+
       - name: Build
-        run: cargo build --verbose
+        run: cargo build
+
       - name: Run tests
-        run: cargo test --verbose -p schedule_parser
+        run: cargo test
+        env:
+          DATABASE_URL: ${{ secrets.TEST_DATABASE_URL }}
+          SCHEDULE_DISABLE_AUTO_UPDATE: 1
+          JWT_SECRET: "test-secret-at-least-256-bits-used"
+          VK_ID_CLIENT_ID: 0
+          VK_ID_REDIRECT_URI: "vk0://vk.com/blank.html"
+          TELEGRAM_BOT_ID: 0
+          TELEGRAM_MINI_APP_HOST: example.com
+          TELEGRAM_TEST_DC: false
+          YANDEX_CLOUD_API_KEY: ""
+          YANDEX_CLOUD_FUNC_ID: ""

.gitignore

@@ -2,3 +2,6 @@
 .~*.xls
 schedule.json
 teachers.json
+
+.env*
+/*-firebase-adminsdk-*.json

.idea/dataSources.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
+    <data-source source="LOCAL" name="sp@localhost" uuid="28502a90-08bf-4cc0-8494-10dc74e37189">
+      <driver-ref>postgresql</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>org.postgresql.Driver</jdbc-driver>
+      <jdbc-url>jdbc:postgresql://localhost:5432/sp</jdbc-url>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
+  </component>
+</project>

.idea/discord.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DiscordProjectSettings">
+    <option name="show" value="PROJECT_FILES" />
+    <option name="description" value="" />
+    <option name="applicationTheme" value="default" />
+    <option name="iconsTheme" value="default" />
+    <option name="button1Title" value="" />
+    <option name="button1Url" value="" />
+    <option name="button2Title" value="" />
+    <option name="button2Url" value="" />
+    <option name="customApplicationId" value="" />
+  </component>
+</project>

.idea/schedule-parser-rusted.iml

@@ -2,10 +2,19 @@
 <module type="EMPTY_MODULE" version="4">
   <component name="NewModuleRootManager">
     <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/lib/schedule_parser/benches" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/lib/schedule_parser/src" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/actix-macros/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/actix-test/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/schedule-parser/benches" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/schedule-parser/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/providers/base/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/providers/provider-engels-polytechnic/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/providers/src" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/actix-macros/target" />
+      <excludeFolder url="file://$MODULE_DIR$/actix-test/target" />
       <excludeFolder url="file://$MODULE_DIR$/target" />
+      <excludeFolder url="file://$MODULE_DIR$/.idea/dataSources" />
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />

CODE_OF_CONDUCT.md

@@ -0,0 +1,128 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+email.
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior,  harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.

Cargo.toml

@@ -1,13 +1,81 @@
 [workspace]
-members = ["lib/schedule_parser"]
+members = ["actix-macros", "actix-test", "providers"]
 
 [package]
 name = "schedule-parser-rusted"
-version = "0.2.0"
+version = "1.2.2"
 edition = "2024"
 publish = false
 
+[profile.release]
+debug = true
+
+[features]
+trace = ["tracing", "console-subscriber"]
+
 [dependencies]
+providers = { path = "providers" }
+actix-macros = { path = "actix-macros" }
+
+# serve api
+actix-web = "4.11.0"
+
+# basic
+chrono = { version = "0.4.41", features = ["serde"] }
+derive_more = { version = "2.0.1", features = ["full"] }
+dotenvy = "0.15.7"
+
+# sql
+database = { path = "database" }
+
+# logging
+env_logger = "0.11.8"
+
+# async
+tokio = { version = "1.47.1", features = ["macros", "rt-multi-thread"] }
+tokio-util = "0.7.16"
+futures-util = "0.3.31"
+
+# authorization
+bcrypt = "0.17.1"
+jsonwebtoken = { version = "9.3.1", features = ["use_pem"] }
+
+# creating users
+objectid = "0.2.0"
+
+# schedule downloader
+reqwest = { version = "0.12.23", features = ["json"] }
+mime = "0.3.17"
+
+# error handling
+sentry = "0.42.0"
+sentry-actix = "0.42.0"
+
+# [de]serializing
 serde = { version = "1.0.219", features = ["derive"] }
-serde_json = "1.0.140"
-schedule_parser = { path = "./lib/schedule_parser" }
+serde_json = "1.0.143"
+serde_with = "3.14.0"
+
+sha1 = "0.11.0-rc.2"
+
+# documentation
+utoipa = { version = "5.4.0", features = ["actix_extras", "chrono"] }
+utoipa-rapidoc = { version = "6.0.0", features = ["actix-web"] }
+utoipa-actix-web = "0.1.2"
+
+uuid = { version = "1.18.1", features = ["v4"] }
+hex-literal = "1"
+log = "0.4.27"
+
+# telegram webdata deciding and verify
+base64 = "0.22.1"
+percent-encoding = "2.3.2"
+ed25519-dalek = "3.0.0-pre.0"
+
+# development tracing
+console-subscriber = { version = "0.4.1", optional = true }
+tracing = { version = "0.1.41", optional = true }
+
+[dev-dependencies]
+providers = { path = "providers", features = ["test"] }
+actix-test = { path = "actix-test" }

Dockerfile

@@ -0,0 +1,14 @@
+FROM debian:stable-slim
+LABEL authors="n08i40k"
+
+ARG BINARY_NAME
+
+WORKDIR /app/
+
+RUN apt update && \
+    apt install -y libpq5 ca-certificates openssl
+
+COPY ./${BINARY_NAME} /bin/main
+RUN chmod +x /bin/main
+
+ENTRYPOINT ["main"]

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Nikita
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

actix-macros/.gitignore

@@ -0,0 +1 @@
+/target

actix-macros/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "actix-macros"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+syn = "2.0.106"
+quote = "1.0.40"
+proc-macro2 = "1.0.101"
+
+[lib]
+proc-macro = true

actix-macros/src/lib.rs

@@ -0,0 +1,170 @@
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+
+mod shared {
+    use quote::{ToTokens, quote};
+    use syn::{Attribute, DeriveInput};
+
+    pub fn find_status_code(attrs: &[Attribute]) -> Option<proc_macro2::TokenStream> {
+        attrs
+            .iter()
+            .find_map(|attr| -> Option<proc_macro2::TokenStream> {
+                if !attr.path().is_ident("status_code") {
+                    return None;
+                }
+
+                let meta = attr.meta.require_name_value().ok()?;
+
+                let code = meta.value.to_token_stream().to_string();
+                let trimmed_code = code.trim_matches('"');
+
+                if let Ok(numeric_code) = trimmed_code.parse::<u16>() {
+                    Some(quote! { actix_web::http::StatusCode::from_u16(#numeric_code).unwrap() })
+                } else {
+                    let string_code: proc_macro2::TokenStream =
+                        trimmed_code.to_string().parse().unwrap();
+
+                    Some(quote! { #string_code })
+                }
+            })
+    }
+
+    pub fn get_arms(ast: &DeriveInput) -> Vec<proc_macro2::TokenStream> {
+        let name = &ast.ident;
+
+        let variants = if let syn::Data::Enum(data) = &ast.data {
+            &data.variants
+        } else {
+            panic!("Only enums are supported");
+        };
+
+        let mut status_code_arms: Vec<proc_macro2::TokenStream> = variants
+            .iter()
+            .filter_map(|v| -> Option<proc_macro2::TokenStream> {
+                let status_code = find_status_code(&v.attrs)?;
+                let variant_name = &v.ident;
+
+                Some(quote! { #name::#variant_name => #status_code, })
+            })
+            .collect();
+
+        if status_code_arms.len() < variants.len() {
+            let status_code = find_status_code(&ast.attrs)
+                .unwrap_or_else(|| quote! { ::actix_web::http::StatusCode::INTERNAL_SERVER_ERROR });
+
+            status_code_arms.push(quote! { _ => #status_code });
+        }
+
+        status_code_arms
+    }
+}
+
+mod middleware_error {
+    use proc_macro::TokenStream;
+    use quote::quote;
+
+    pub fn fmt(ast: &syn::DeriveInput) -> TokenStream {
+        let name = &ast.ident;
+
+        let status_code_arms = super::shared::get_arms(ast);
+
+        TokenStream::from(quote! {
+            impl ::actix_web::ResponseError for #name {
+                fn status_code(&self) -> ::actix_web::http::StatusCode {
+                    match self {
+                        #(#status_code_arms)*
+                    }
+                }
+
+                fn error_response(&self) -> ::actix_web::HttpResponse<BoxBody> {
+                    ::actix_web::HttpResponse::build(self.status_code())
+                        .json(crate::middlewares::error::MiddlewareError::new(self.clone()))
+                }
+            }
+        })
+    }
+}
+
+mod responder_json {
+    use proc_macro::TokenStream;
+    use quote::quote;
+
+    pub fn fmt(ast: &syn::DeriveInput) -> TokenStream {
+        let name = &ast.ident;
+
+        TokenStream::from(quote! {
+            impl ::actix_web::Responder for #name {
+                type Body = ::actix_web::body::EitherBody<::actix_web::body::BoxBody>;
+
+                fn respond_to(self, _: &::actix_web::HttpRequest) -> ::actix_web::HttpResponse<Self::Body> {
+                    ::actix_web::HttpResponse::Ok()
+                            .json(self)
+                            .map_into_left_body()
+                }
+            }
+        })
+    }
+}
+
+mod ok_response {
+    use proc_macro::TokenStream;
+    use quote::quote;
+
+    pub fn fmt(ast: &syn::DeriveInput) -> TokenStream {
+        let name = &ast.ident;
+
+        TokenStream::from(quote! {
+            impl crate::routes::schema::PartialOkResponse for #name {}
+        })
+    }
+}
+
+mod err_response {
+    use proc_macro::TokenStream;
+    use quote::quote;
+
+    pub fn fmt(ast: &syn::DeriveInput) -> TokenStream {
+        let name = &ast.ident;
+
+        let status_code_arms = super::shared::get_arms(ast);
+
+        TokenStream::from(quote! {
+            impl crate::routes::schema::PartialErrResponse for #name {
+                fn status_code(&self) -> ::actix_web::http::StatusCode {
+                    match self {
+                        #(#status_code_arms)*
+                    }
+                }
+            }
+        })
+    }
+}
+
+#[proc_macro_derive(MiddlewareError, attributes(status_code))]
+pub fn moddleware_error_derive(input: TokenStream) -> TokenStream {
+    let ast = syn::parse(input).unwrap();
+
+    middleware_error::fmt(&ast)
+}
+
+#[proc_macro_derive(ResponderJson)]
+pub fn responser_json_derive(input: TokenStream) -> TokenStream {
+    let ast = syn::parse(input).unwrap();
+
+    responder_json::fmt(&ast)
+}
+
+#[proc_macro_derive(OkResponse)]
+pub fn ok_response_derive(input: TokenStream) -> TokenStream {
+    let ast = syn::parse(input).unwrap();
+
+    ok_response::fmt(&ast)
+}
+
+#[proc_macro_derive(ErrResponse, attributes(status_code))]
+pub fn err_response_derive(input: TokenStream) -> TokenStream {
+    let ast = syn::parse(input).unwrap();
+
+    err_response::fmt(&ast)
+}

actix-test/.gitignore

@@ -0,0 +1 @@
+/target

actix-test/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "actix-test"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+actix-http = "3.11.1"
+actix-web = "4.11.0"

actix-test/src/lib.rs

@@ -0,0 +1,12 @@
+use actix_web::dev::{HttpServiceFactory, Service, ServiceResponse};
+use actix_web::{App, test, web};
+
+pub async fn test_app<F, A: 'static>(
+    app_state: web::Data<A>,
+    factory: F,
+) -> impl Service<actix_http::Request, Response = ServiceResponse, Error = actix_web::Error>
+where
+    F: HttpServiceFactory + 'static,
+{
+    test::init_service(App::new().app_data(app_state).service(factory)).await
+}

database/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "database"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+migration = { path = "migration" }
+entity = { path = "entity" }
+sea-orm = { version = "2.0.0-rc.6", features = ["sqlx-postgres", "runtime-tokio"] }
+
+paste = "1.0.15"

database/entity/.gitignore

@@ -0,0 +1 @@
+/target

database/entity/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "entity"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+sea-orm = "2.0.0-rc.6"
+serde = { version = "1.0.219", features = ["derive"] }
+utoipa = "5.4.0"

database/entity/src/lib.rs

@@ -0,0 +1,6 @@
+//! `SeaORM` Entity, @generated by sea-orm-codegen 1.1.12
+
+pub mod prelude;
+
+pub mod sea_orm_active_enums;
+pub mod user;

database/entity/src/prelude.rs

@@ -0,0 +1,3 @@
+//! `SeaORM` Entity, @generated by sea-orm-codegen 1.1.12
+
+pub use super::user::Entity as User;

database/entity/src/sea_orm_active_enums.rs

@@ -0,0 +1,25 @@
+//! `SeaORM` Entity, @generated by sea-orm-codegen 1.1.12
+
+use sea_orm::entity::prelude::*;
+
+#[derive(
+    Debug,
+    Clone,
+    PartialEq,
+    Eq,
+    EnumIter,
+    DeriveActiveEnum,
+    :: serde :: Serialize,
+    :: serde :: Deserialize,
+    :: utoipa :: ToSchema,
+)]
+#[sea_orm(rs_type = "String", db_type = "Enum", enum_name = "user_role")]
+#[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+pub enum UserRole {
+    #[sea_orm(string_value = "student")]
+    Student,
+    #[sea_orm(string_value = "teacher")]
+    Teacher,
+    #[sea_orm(string_value = "admin")]
+    Admin,
+}

database/entity/src/user.rs

@@ -0,0 +1,25 @@
+//! `SeaORM` Entity, @generated by sea-orm-codegen 1.1.12
+
+use super::sea_orm_active_enums::UserRole;
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Eq)]
+#[sea_orm(table_name = "user")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub id: String,
+    #[sea_orm(unique)]
+    pub username: String,
+    pub password: Option<String>,
+    pub vk_id: Option<i32>,
+    pub group: Option<String>,
+    pub role: UserRole,
+    pub android_version: Option<String>,
+    #[sea_orm(unique)]
+    pub telegram_id: Option<i64>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}

database/migration/.gitignore

@@ -0,0 +1 @@
+/target

database/migration/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "migration"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[lib]
+name = "migration"
+path = "src/lib.rs"
+
+[dependencies]
+async-std = { version = "1", features = ["attributes", "tokio1"] }
+
+[dependencies.sea-orm-migration]
+version = "2.0.0-rc.6"
+features = [
+    # Enable at least one `ASYNC_RUNTIME` and `DATABASE_DRIVER` feature if you want to run migration via CLI.
+    # View the list of supported features at https://www.sea-ql.org/SeaORM/docs/install-and-config/database-and-async-runtime.
+    # e.g.
+    "runtime-tokio", # `ASYNC_RUNTIME` feature
+    "sqlx-postgres", # `DATABASE_DRIVER` feature
+]

database/migration/src/lib.rs

@@ -0,0 +1,16 @@
+pub use sea_orm_migration::prelude::MigratorTrait;
+
+use sea_orm_migration::prelude::*;
+
+mod m20250904_024854_init;
+
+pub struct Migrator;
+
+#[async_trait::async_trait]
+impl MigratorTrait for Migrator {
+    fn migrations() -> Vec<Box<dyn MigrationTrait>> {
+        vec![
+            Box::new(m20250904_024854_init::Migration),
+        ]
+    }
+}

database/migration/src/m20250904_024854_init.rs

@@ -0,0 +1,70 @@
+use sea_orm_migration::prelude::extension::postgres::Type;
+use sea_orm_migration::sea_orm::{EnumIter, Iterable};
+use sea_orm_migration::{prelude::*, schema::*};
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_type(
+                Type::create()
+                    .as_enum(UserRole)
+                    .values(UserRoleVariants::iter())
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_table(
+                Table::create()
+                    .table(User::Table)
+                    .if_not_exists()
+                    .col(string_uniq(User::Id).primary_key().not_null())
+                    .col(string_uniq(User::Username).not_null())
+                    .col(string_null(User::Password))
+                    .col(integer_null(User::VkId))
+                    .col(string_null(User::Group))
+                    .col(enumeration(User::Role, UserRole, UserRoleVariants::iter()))
+                    .col(string_null(User::AndroidVersion))
+                    .col(big_integer_null(User::TelegramId).unique_key())
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table(User::Table).to_owned())
+            .await?;
+
+        manager
+            .drop_type(Type::drop().name(UserRole).to_owned())
+            .await
+    }
+}
+
+#[derive(DeriveIden)]
+struct UserRole;
+
+#[derive(DeriveIden, EnumIter)]
+enum UserRoleVariants {
+    Student,
+    Teacher,
+    Admin,
+}
+
+#[derive(DeriveIden)]
+enum User {
+    Table,
+    Id,
+    Username,
+    Password,
+    VkId,
+    Group,
+    Role,
+    AndroidVersion,
+    TelegramId,
+}

database/migration/src/main.rs

@@ -0,0 +1,6 @@
+use sea_orm_migration::prelude::*;
+
+#[async_std::main]
+async fn main() {
+    cli::run_cli(migration::Migrator).await;
+}

database/src/lib.rs

@@ -0,0 +1,10 @@
+pub mod query;
+
+pub use migration;
+pub use sea_orm;
+
+pub mod entity {
+    pub use entity::*;
+
+    pub use entity::user::{ActiveModel as ActiveUser, Model as User, Entity as UserEntity, Column as UserColumn};
+}

database/src/query.rs

@@ -0,0 +1,63 @@
+use paste::paste;
+use sea_orm::ColumnTrait;
+use sea_orm::EntityTrait;
+use sea_orm::QueryFilter;
+
+pub struct Query;
+
+macro_rules! ref_type {
+    (String) => {
+        &String
+    };
+    (str) => {
+        &str
+    };
+    ($other:ty) => {
+        $other
+    };
+}
+
+macro_rules! define_is_exists {
+    ($entity: ident, $by: ident, $by_type: ident, $by_column: ident) => {
+        paste! {
+            pub async fn [<is_ $entity _exists_by_ $by>](
+                db: &::sea_orm::DbConn,
+                $by: ref_type!($by_type)
+            ) -> Result<bool, ::sea_orm::DbErr> {
+                ::entity::$entity::Entity::find()
+                    .filter(::entity::$entity::Column::$by_column.eq($by))
+                    .one(db)
+                    .await
+                    .map(|x| x.is_some())
+            }
+        }
+    };
+}
+
+macro_rules! define_find_by {
+    ($entity: ident, $by: ident, $by_type: ident, $by_column: ident) => {
+        paste! {
+            pub async fn [<find_ $entity _by_ $by>](
+                db: &::sea_orm::DbConn,
+                $by: ref_type!($by_type)
+            ) -> Result<Option<::entity::$entity::Model>, ::sea_orm::DbErr> {
+                ::entity::$entity::Entity::find()
+                    .filter(::entity::$entity::Column::$by_column.eq($by))
+                    .one(db)
+                    .await
+            }
+        }
+    };
+}
+
+impl Query {
+    define_find_by!(user, id, str, Id);
+    define_find_by!(user, telegram_id, i64, TelegramId);
+    define_find_by!(user, vk_id, i32, VkId);
+    define_find_by!(user, username, str, Username);
+
+    define_is_exists!(user, id, str, Id);
+    define_is_exists!(user, username, str, Username);
+    define_is_exists!(user, telegram_id, i64, TelegramId);
+    define_is_exists!(user, vk_id, i32, VkId);
+}

lib/schedule_parser/Cargo.toml

@@ -1,23 +0,0 @@
-[package]
-name = "schedule_parser"
-version = "0.2.0"
-edition = "2024"
-
-[lib]
-name = "schedule_parser"
-path = "src/lib/lib.rs"
-
-[dependencies]
-serde = { version = "1.0.219", features = ["derive"] }
-serde_repr = "0.1.20"
-chrono = { version = "0.4.40", features = ["serde"] }
-calamine = "0.26.1"
-regex = "1.11.1"
-fuzzy-matcher = "0.3.7"
-
-[dev-dependencies]
-criterion = "0.5.1"
-
-[[bench]]
-name = "parse"
-harness = false

lib/schedule_parser/benches/parse.rs

@@ -1,12 +0,0 @@
-use criterion::{Criterion, criterion_group, criterion_main};
-use schedule_parser::parse_xls;
-use std::path::Path;
-
-pub fn bench_parse_xls(c: &mut Criterion) {
-    c.bench_function("parse_xls", |b| {
-        b.iter(|| parse_xls(Path::new("../../schedule.xls")))
-    });
-}
-
-criterion_group!(benches, bench_parse_xls);
-criterion_main!(benches);

lib/schedule_parser/src/lib/lib.rs

@@ -1,702 +0,0 @@
-use crate::LessonParseResult::{Lessons, Street};
-use crate::schema::LessonType::Break;
-use crate::schema::{Day, Lesson, LessonSubGroup, LessonTime, LessonType, ScheduleEntity};
-use calamine::{Reader, Xls, open_workbook};
-use chrono::{Duration, NaiveDateTime};
-use fuzzy_matcher::FuzzyMatcher;
-use fuzzy_matcher::skim::SkimMatcherV2;
-use regex::Regex;
-use std::collections::HashMap;
-use std::path::Path;
-use std::sync::LazyLock;
-
-mod schema;
-
-struct InternalId {
-    /**
-     * Индекс строки
-     */
-    row: u32,
-
-    /**
-     * Индекс столбца
-     */
-    column: u32,
-
-    /**
-     * Текст в ячейке
-     */
-    name: String,
-}
-
-struct InternalTime {
-    /**
-     * Временной отрезок проведения пары
-     */
-    time_range: LessonTime,
-
-    /**
-     * Тип пары
-     */
-    lesson_type: LessonType,
-
-    /**
-     * Индекс пары
-     */
-    default_index: Option<u32>,
-
-    /**
-     * Рамка ячейки
-     */
-    xls_range: ((u32, u32), (u32, u32)),
-}
-
-type WorkSheet = calamine::Range<calamine::Data>;
-
-fn get_string_from_cell(worksheet: &WorkSheet, row: u32, col: u32) -> Option<String> {
-    let cell_data = if let Some(data) = worksheet.get((row as usize, col as usize)) {
-        data.to_string()
-    } else {
-        return None;
-    };
-
-    if cell_data.trim().is_empty() {
-        return None;
-    }
-
-    static NL_RE: LazyLock<Regex, fn() -> Regex> =
-        LazyLock::new(|| Regex::new(r"[\n\r]+").unwrap());
-    static SP_RE: LazyLock<Regex, fn() -> Regex> = LazyLock::new(|| Regex::new(r"\s+").unwrap());
-
-    let trimmed_data = SP_RE
-        .replace_all(&NL_RE.replace_all(&cell_data, " "), " ")
-        .trim()
-        .to_string();
-
-    if trimmed_data.is_empty() {
-        None
-    } else {
-        Some(trimmed_data)
-    }
-}
-
-fn get_merge_from_start(worksheet: &WorkSheet, row: u32, column: u32) -> ((u32, u32), (u32, u32)) {
-    let worksheet_end = worksheet.end().unwrap();
-
-    let row_end: u32 = {
-        let mut r: u32 = 0;
-
-        for _r in (row + 1)..worksheet_end.0 {
-            r = _r;
-
-            if let Some(_) = worksheet.get((_r as usize, column as usize)) {
-                break;
-            }
-        }
-
-        r
-    };
-
-    let column_end: u32 = {
-        let mut c: u32 = 0;
-
-        for _c in (column + 1)..worksheet_end.1 {
-            c = _c;
-
-            if let Some(_) = worksheet.get((row as usize, _c as usize)) {
-                break;
-            }
-        }
-
-        c
-    };
-
-    ((row, column), (row_end, column_end))
-}
-
-fn parse_skeleton(worksheet: &WorkSheet) -> (Vec<InternalId>, Vec<InternalId>) {
-    let range = &worksheet;
-
-    let mut is_parsed = false;
-
-    let mut groups: Vec<InternalId> = Vec::new();
-    let mut days: Vec<InternalId> = Vec::new();
-
-    let start = range.start().expect("Could not find start");
-    let end = range.end().expect("Could not find end");
-
-    let mut row = start.0;
-    while row < end.0 {
-        row += 1;
-
-        let day_name_opt = get_string_from_cell(&worksheet, row, 0);
-        if day_name_opt.is_none() {
-            continue;
-        }
-
-        let day_name = day_name_opt.unwrap();
-
-        if !is_parsed {
-            is_parsed = true;
-
-            row -= 1;
-
-            for column in (start.1 + 2)..=end.1 {
-                let group_name = get_string_from_cell(&worksheet, row, column);
-                if group_name.is_none() {
-                    continue;
-                }
-
-                groups.push(InternalId {
-                    row,
-                    column,
-                    name: group_name.unwrap(),
-                });
-            }
-
-            row += 1;
-        }
-
-        days.push(InternalId {
-            row,
-            column: 0,
-            name: day_name.clone(),
-        });
-
-        if days.len() > 2 && day_name.starts_with("Суббота") {
-            break;
-        }
-    }
-
-    (days, groups)
-}
-
-enum LessonParseResult {
-    Lessons(Vec<Lesson>),
-    Street(String),
-}
-
-trait StringInnerSlice {
-    fn inner_slice(&self, from: usize, to: usize) -> Self;
-}
-
-impl StringInnerSlice for String {
-    fn inner_slice(&self, from: usize, to: usize) -> Self {
-        self.chars()
-            .take(from)
-            .chain(self.chars().skip(to))
-            .collect()
-    }
-}
-
-fn guess_lesson_type(name: &String) -> Option<(String, LessonType)> {
-    let map: HashMap<String, LessonType> = HashMap::from([
-        ("(консультация)".to_string(), LessonType::Consultation),
-        (
-            "самостоятельная работа".to_string(),
-            LessonType::IndependentWork,
-        ),
-        ("зачет".to_string(), LessonType::Exam),
-        ("зачет с оценкой".to_string(), LessonType::ExamWithGrade),
-        ("экзамен".to_string(), LessonType::ExamDefault),
-    ]);
-
-    let matcher = SkimMatcherV2::default();
-    let name_lower = name.to_lowercase();
-
-    type SearchResult<'a> = (&'a LessonType, i64, Vec<usize>);
-
-    let mut search_results: Vec<SearchResult> = map
-        .iter()
-        .map(|entry| -> SearchResult {
-            if let Some((score, indices)) = matcher.fuzzy_indices(&*name_lower, entry.0) {
-                return (entry.1, score, indices);
-            }
-
-            (entry.1, 0, Vec::new())
-        })
-        .collect();
-    search_results.sort_by(|a, b| b.1.cmp(&a.1));
-
-    let guessed_type = search_results.first().unwrap();
-
-    if guessed_type.1 > 80 {
-        Some((
-            name.inner_slice(guessed_type.2[0], guessed_type.2[guessed_type.2.len() - 1]),
-            guessed_type.0.clone(),
-        ))
-    } else {
-        None
-    }
-}
-
-fn parse_lesson(
-    worksheet: &WorkSheet,
-    day: &mut Day,
-    day_times: &Vec<InternalTime>,
-    time: &InternalTime,
-    column: u32,
-) -> LessonParseResult {
-    let row = time.xls_range.0.0;
-
-    let (name, lesson_type) = {
-        let raw_name_opt = get_string_from_cell(&worksheet, row, column);
-        if raw_name_opt.is_none() {
-            return Lessons(Vec::new());
-        }
-
-        let raw_name = raw_name_opt.unwrap();
-
-        static OTHER_STREET_RE: LazyLock<Regex, fn() -> Regex> =
-            LazyLock::new(|| Regex::new(r"^[А-Я][а-я]+,?\s?[0-9]+$").unwrap());
-
-        if OTHER_STREET_RE.is_match(&raw_name) {
-            return Street(raw_name);
-        }
-
-        if let Some(guess) = guess_lesson_type(&raw_name) {
-            guess
-        } else {
-            (raw_name, time.lesson_type.clone())
-        }
-    };
-
-    let (default_range, lesson_time): (Option<[u8; 2]>, LessonTime) = {
-        // check if multi-lesson
-        let cell_range = get_merge_from_start(worksheet, row, column);
-
-        let end_time_arr = day_times
-            .iter()
-            .filter(|time| time.xls_range.1.0 == cell_range.1.0)
-            .collect::<Vec<&InternalTime>>();
-
-        let end_time = end_time_arr.first().expect("Unable to find lesson time!");
-
-        let range: Option<[u8; 2]> = if time.default_index != None {
-            let default = time.default_index.unwrap() as u8;
-            Some([default, end_time.default_index.unwrap() as u8])
-        } else {
-            None
-        };
-
-        let time = LessonTime {
-            start: time.time_range.start,
-            end: end_time.time_range.end,
-        };
-
-        (range, time)
-    };
-
-    let (name, mut subgroups) = parse_name_and_subgroups(&name);
-
-    {
-        let cabinets: Vec<String> = parse_cabinets(worksheet, row, column + 1);
-
-        // Если количество кабинетов равно 1, назначаем этот кабинет всем подгруппам
-        if cabinets.len() == 1 {
-            for subgroup in &mut subgroups {
-                subgroup.cabinet = Some(cabinets.get(0).or(Some(&String::new())).unwrap().clone())
-            }
-        }
-        // Если количество кабинетов совпадает с количеством подгрупп, назначаем кабинеты по порядку
-        else if cabinets.len() == subgroups.len() {
-            for subgroup in &mut subgroups {
-                subgroup.cabinet = Some(
-                    cabinets
-                        .get((subgroup.number - 1) as usize)
-                        .unwrap()
-                        .clone(),
-                );
-            }
-        }
-        // Если количество кабинетов больше количества подгрупп, делаем ещё одну подгруппу.
-        else if cabinets.len() > subgroups.len() {
-            for index in 0..subgroups.len() {
-                subgroups[index].cabinet = Some(cabinets[index].clone());
-            }
-
-            while cabinets.len() > subgroups.len() {
-                subgroups.push(LessonSubGroup {
-                    number: (subgroups.len() + 1) as u8,
-                    cabinet: Some(cabinets[subgroups.len()].clone()),
-                    teacher: "Ошибка в расписании".to_string(),
-                });
-            }
-        }
-        // Если кабинетов нет, но есть подгруппы, назначаем им значение "??"
-        else {
-            for subgroup in &mut subgroups {
-                subgroup.cabinet = Some("??".to_string());
-            }
-        }
-
-        cabinets
-    };
-
-    let lesson = Lesson {
-        lesson_type,
-        default_range,
-        name: Some(name),
-        time: lesson_time,
-        subgroups: Some(subgroups),
-        group: None,
-    };
-
-    let prev_lesson = if day.lessons.len() == 0 {
-        return Lessons(Vec::from([lesson]));
-    } else {
-        &day.lessons[day.lessons.len() - 1]
-    };
-
-    Lessons(Vec::from([
-        Lesson {
-            lesson_type: Break,
-            default_range: None,
-            name: None,
-            time: LessonTime {
-                start: prev_lesson.time.end,
-                end: lesson.time.start,
-            },
-            subgroups: Some(Vec::new()),
-            group: None,
-        },
-        lesson,
-    ]))
-}
-
-fn parse_cabinets(worksheet: &WorkSheet, row: u32, column: u32) -> Vec<String> {
-    let mut cabinets: Vec<String> = Vec::new();
-
-    if let Some(raw) = get_string_from_cell(&worksheet, row, column) {
-        let clean = raw.replace("\n", " ");
-        let parts: Vec<&str> = clean.split(" ").collect();
-
-        for part in parts {
-            let clean_part = part.to_string().trim().to_string();
-
-            cabinets.push(clean_part);
-        }
-    }
-
-    cabinets
-}
-
-fn parse_name_and_subgroups(name: &String) -> (String, Vec<LessonSubGroup>) {
-    static LESSON_RE: LazyLock<Regex, fn() -> Regex> =
-        LazyLock::new(|| Regex::new(r"(?:[А-Я][а-я]+[А-Я]{2}(?:\([0-9][а-я]+\))?)+$").unwrap());
-    static TEACHER_RE: LazyLock<Regex, fn() -> Regex> =
-        LazyLock::new(|| Regex::new(r"([А-Я][а-я]+)([А-Я])([А-Я])(?:\(([0-9])[а-я]+\))?").unwrap());
-    static CLEAN_RE: LazyLock<Regex, fn() -> Regex> =
-        LazyLock::new(|| Regex::new(r"[\s.,]+").unwrap());
-    static NAME_CLEAN_RE: LazyLock<Regex, fn() -> Regex> =
-        LazyLock::new(|| Regex::new(r"\.\s+$").unwrap());
-
-    let (teachers, lesson_name) = {
-        let clean_name = CLEAN_RE.replace_all(&name, "").to_string();
-
-        if let Some(captures) = LESSON_RE.captures(&clean_name) {
-            let capture = captures.get(0).unwrap();
-            let capture_str = capture.as_str().to_string();
-            let capture_name: String = capture_str.chars().take(5).collect();
-
-            (
-                NAME_CLEAN_RE.replace(&capture_str, "").to_string(),
-                name[0..name.find(&*capture_name).unwrap()].to_string(),
-            )
-        } else {
-            return (NAME_CLEAN_RE.replace(&name, "").to_string(), Vec::new());
-        }
-    };
-
-    let mut subgroups: Vec<LessonSubGroup> = Vec::new();
-
-    let teacher_it = TEACHER_RE.captures_iter(&teachers);
-
-    for captures in teacher_it {
-        subgroups.push(LessonSubGroup {
-            number: if let Some(capture) = captures.get(4) {
-                capture
-                    .as_str()
-                    .to_string()
-                    .parse::<u8>()
-                    .expect("Unable to read subgroup index!")
-            } else {
-                0
-            },
-            cabinet: None,
-            teacher: format!(
-                "{} {}.{}.",
-                captures.get(1).unwrap().as_str().to_string(),
-                captures.get(2).unwrap().as_str().to_string(),
-                captures.get(3).unwrap().as_str().to_string()
-            ),
-        })
-    }
-
-    // фикс, если у кого-то отсутствует индекс подгруппы
-
-    if subgroups.len() == 1 {
-        let index = subgroups[0].number;
-
-        if index == 0 {
-            subgroups[0].number = 1u8;
-        } else {
-            subgroups.push(LessonSubGroup {
-                number: if index == 1 { 2 } else { 1 },
-                cabinet: None,
-                teacher: "Только у другой".to_string(),
-            });
-        }
-    } else if subgroups.len() == 2 {
-        // если индексы отсутствуют у обоих, ставим поочерёдно
-        if subgroups[0].number == 0 && subgroups[1].number == 0 {
-            subgroups[0].number = 1;
-            subgroups[1].number = 2;
-        }
-        // если индекс отсутствует у первого, ставим 2, если у второго индекс 1 и наоборот
-        else if subgroups[0].number == 0 {
-            subgroups[0].number = if subgroups[1].number == 1 { 2 } else { 1 };
-        }
-        // если индекс отсутствует у второго, ставим 2, если у первого индекс 1 и наоборот
-        else if subgroups[1].number == 0 {
-            subgroups[1].number = if subgroups[0].number == 1 { 2 } else { 1 };
-        }
-    }
-
-    if subgroups.len() == 2 && subgroups[0].number == 2 && subgroups[1].number == 1 {
-        subgroups.reverse()
-    }
-
-    (lesson_name, subgroups)
-}
-
-fn convert_groups_to_teachers(
-    groups: &HashMap<String, ScheduleEntity>,
-) -> HashMap<String, ScheduleEntity> {
-    let mut teachers: HashMap<String, ScheduleEntity> = HashMap::new();
-
-    let empty_days: Vec<Day> = groups
-        .values()
-        .next()
-        .unwrap()
-        .days
-        .iter()
-        .map(|day| Day {
-            name: day.name.clone(),
-            street: day.street.clone(),
-            date: day.date.clone(),
-            lessons: vec![],
-        })
-        .collect();
-
-    for group in groups.values() {
-        for (index, day) in group.days.iter().enumerate() {
-            for group_lesson in &day.lessons {
-                if group_lesson.lesson_type == Break {
-                    continue;
-                }
-
-                if group_lesson.subgroups.is_none() {
-                    continue;
-                }
-
-                let subgroups = group_lesson.subgroups.as_ref().unwrap();
-
-                for subgroup in subgroups {
-                    if subgroup.teacher == "Ошибка в расписании" {
-                        continue;
-                    }
-
-                    if !teachers.contains_key(&subgroup.teacher) {
-                        teachers.insert(
-                            subgroup.teacher.clone(),
-                            ScheduleEntity {
-                                name: subgroup.teacher.clone(),
-                                days: empty_days.to_vec(),
-                            },
-                        );
-                    }
-
-                    let teacher_day = teachers
-                        .get_mut(&subgroup.teacher)
-                        .unwrap()
-                        .days
-                        .get_mut(index)
-                        .unwrap();
-
-                    teacher_day.lessons.push({
-                        let mut lesson = group_lesson.clone();
-                        lesson.group = Some(group.name.clone());
-
-                        lesson
-                    });
-                }
-            }
-        }
-    }
-
-    teachers
-}
-
-pub fn parse_xls(
-    path: &Path,
-) -> (
-    HashMap<String, ScheduleEntity>,
-    HashMap<String, ScheduleEntity>,
-) {
-    let mut workbook: Xls<_> = open_workbook(path).expect("Can't open workbook");
-
-    let worksheet: WorkSheet = workbook
-        .worksheets()
-        .first()
-        .expect("No worksheet found")
-        .1
-        .to_owned();
-
-    let (days_markup, groups_markup) = parse_skeleton(&worksheet);
-
-    let mut groups: HashMap<String, ScheduleEntity> = HashMap::new();
-    let mut days_times: Vec<Vec<InternalTime>> = Vec::new();
-
-    let saturday_end_row = worksheet.end().unwrap().0;
-
-    for group_markup in groups_markup {
-        let mut group = ScheduleEntity {
-            name: group_markup.name,
-            days: Vec::new(),
-        };
-
-        for day_index in 0..(&days_markup).len() {
-            let day_markup = &days_markup[day_index];
-
-            let mut day = {
-                let space_index = day_markup.name.find(' ').unwrap();
-
-                let name = day_markup.name[..space_index].to_string();
-
-                let date_raw = day_markup.name[space_index + 1..].to_string();
-                let date_add = format!("{} 00:00:00", date_raw);
-
-                let date = NaiveDateTime::parse_from_str(&*date_add, "%d.%m.%Y %H:%M:%S");
-
-                Day {
-                    name,
-                    street: None,
-                    date: date.unwrap().and_utc(),
-                    lessons: Vec::new(),
-                }
-            };
-
-            let lesson_time_column = days_markup[0].column + 1;
-
-            let row_distance = if day_index != days_markup.len() - 1 {
-                days_markup[day_index + 1].row
-            } else {
-                saturday_end_row
-            } - day_markup.row;
-
-            if days_times.len() != 6 {
-                let mut day_times: Vec<InternalTime> = Vec::new();
-
-                for row in day_markup.row..(day_markup.row + row_distance) {
-                    // time
-                    let time_opt = get_string_from_cell(&worksheet, row, lesson_time_column);
-                    if time_opt.is_none() {
-                        continue;
-                    }
-
-                    let time = time_opt.unwrap();
-
-                    // type
-                    let lesson_type = if time.contains("пара") {
-                        LessonType::Default
-                    } else {
-                        LessonType::Additional
-                    };
-
-                    // lesson index
-                    let default_index = if lesson_type == LessonType::Default {
-                        Some(
-                            time.chars()
-                                .next()
-                                .unwrap()
-                                .to_string()
-                                .parse::<u32>()
-                                .unwrap(),
-                        )
-                    } else {
-                        None
-                    };
-
-                    // time
-                    let time_range = {
-                        static TIME_RE: LazyLock<Regex, fn() -> Regex> =
-                            LazyLock::new(|| Regex::new(r"(\d+\.\d+)-(\d+\.\d+)").unwrap());
-
-                        let parse_res = TIME_RE
-                            .captures(&time)
-                            .expect("Unable to obtain lesson start and end!");
-
-                        let start_match = parse_res.get(1).unwrap().as_str();
-                        let start_parts: Vec<&str> = start_match.split(".").collect();
-
-                        let end_match = parse_res.get(2).unwrap().as_str();
-                        let end_parts: Vec<&str> = end_match.split(".").collect();
-
-                        LessonTime {
-                            start: day.date.clone()
-                                + Duration::hours(start_parts[0].parse().unwrap())
-                                + Duration::minutes(start_parts[1].parse().unwrap()),
-                            end: day.date.clone()
-                                + Duration::hours(end_parts[0].parse().unwrap())
-                                + Duration::minutes(end_parts[1].parse().unwrap()),
-                        }
-                    };
-
-                    day_times.push(InternalTime {
-                        time_range,
-                        lesson_type,
-                        default_index,
-                        xls_range: get_merge_from_start(&worksheet, row, lesson_time_column),
-                    });
-                }
-
-                days_times.push(day_times);
-            }
-
-            let day_times = &days_times[day_index];
-
-            for time in day_times {
-                match &mut parse_lesson(
-                    &worksheet,
-                    &mut day,
-                    &day_times,
-                    &time,
-                    group_markup.column,
-                ) {
-                    Lessons(l) => day.lessons.append(l),
-                    Street(s) => day.street = Some(s.to_owned()),
-                }
-            }
-
-            group.days.push(day);
-        }
-
-        groups.insert(group.name.clone(), group);
-    }
-
-    (convert_groups_to_teachers(&groups), groups)
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        let result = parse_xls(Path::new("../../schedule.xls"));
-        
-        assert_ne!(result.0.len(), 0);
-        assert_ne!(result.1.len(), 0);
-    }
-}

lib/schedule_parser/src/lib/schema.rs

@@ -1,107 +0,0 @@
-use chrono::{DateTime, Utc};
-use serde::{Deserialize, Serialize};
-use serde_repr::{Deserialize_repr, Serialize_repr};
-use std::collections::HashMap;
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct LessonTime {
-    pub start: DateTime<Utc>,
-    pub end: DateTime<Utc>,
-}
-
-#[derive(Serialize_repr, Deserialize_repr, Debug, PartialEq, Clone)]
-#[repr(u8)]
-pub enum LessonType {
-    Default = 0,     // Обычная
-    Additional,      // Допы
-    Break,           // Перемена
-    Consultation,    // Консультация
-    IndependentWork, // Самостоятельная работа
-    Exam,            // Зачёт
-    ExamWithGrade,   // Зачет с оценкой
-    ExamDefault,     // Экзамен
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct LessonSubGroup {
-    pub number: u8,
-
-    pub cabinet: Option<String>,
-
-    pub teacher: String,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct Lesson {
-    /**
-     * Тип занятия
-     */
-    #[serde(rename = "type")]
-    pub lesson_type: LessonType,
-
-    /**
-     * Индексы пар, если присутствуют
-     */
-    #[serde(rename = "defaultRange")]
-    pub default_range: Option<[u8; 2]>,
-
-    /**
-     * Название занятия
-     */
-    pub name: Option<String>,
-
-    /**
-     * Начало и конец занятия
-     */
-    pub time: LessonTime,
-
-    /**
-     * Подгруппы
-     */
-    #[serde(rename = "subGroups")]
-    pub subgroups: Option<Vec<LessonSubGroup>>,
-
-    /**
-     * Группа (только для расписания преподавателей)
-     */
-    pub group: Option<String>,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct Day {
-    pub name: String,
-
-    pub street: Option<String>,
-
-    pub date: DateTime<Utc>,
-
-    pub lessons: Vec<Lesson>,
-}
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct ScheduleEntity {
-    pub name: String,
-
-    pub days: Vec<Day>,
-}
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct Schedule {
-    #[serde(rename = "updatedAt")]
-    pub updated_at: DateTime<Utc>,
-
-    pub groups: HashMap<String, ScheduleEntity>,
-
-    #[serde(rename = "updatedGroups")]
-    pub updated_groups: Vec<Vec<usize>>,
-}
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct TeacherSchedule {
-    #[serde(rename = "updatedAt")]
-    pub updated_at: DateTime<Utc>,
-
-    pub teacher: ScheduleEntity,
-
-    pub updated: Vec<usize>,
-}

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.2"

providers/base/src/hasher.rs

@@ -0,0 +1,53 @@
+use sha1::Digest;
+use sha1::digest::OutputSizeUser;
+use sha1::digest::typenum::Unsigned;
+use std::hash::Hasher;
+
+/// Hesher returning hash from the algorithm implementing Digest
+pub struct DigestHasher<D: Digest> {
+    digest: D,
+}
+
+impl<D> DigestHasher<D>
+where
+    D: Digest,
+{
+    /// Obtain hash.
+    pub fn finalize(self) -> String {
+        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
+    }
+}
+
+impl<D> From<D> for DigestHasher<D>
+where
+    D: Digest,
+{
+    /// Creating a hash from an algorithm implementing Digest.
+    fn from(digest: D) -> Self {
+        DigestHasher { digest }
+    }
+}
+
+impl<D: Digest> Hasher for DigestHasher<D> {
+    /// Stopper to prevent calling the standard Hasher result.
+    fn finish(&self) -> u64 {
+        unimplemented!("Do not call finish()");
+    }
+
+    fn write(&mut self, bytes: &[u8]) {
+        self.digest.update(bytes);
+    }
+}

providers/base/src/lib.rs

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

providers/provider-engels-polytechnic/Cargo.toml

@@ -0,0 +1,32 @@
+[package]
+name = "provider-engels-polytechnic"
+version = "0.1.0"
+edition = "2024"
+
+[features]
+test = []
+
+[dependencies]
+base = { path = "../base" }
+
+tokio = { version = "1.47.1", features = ["sync", "macros", "time"] }
+tokio-util = "0.7.16"
+
+chrono = { version = "0.4.41", features = ["serde"] }
+
+serde = { version = "1.0.219", features = ["derive"] }
+
+derive_more = { version = "2.0.1", features = ["error", "display"] }
+
+utoipa = { version = "5.4.0", features = ["macros", "chrono"] }
+
+calamine = "0.30.0"
+async-trait = "0.1.89"
+
+reqwest = "0.12.23"
+ua_generator = "0.5.22"
+regex = "1.11.2"
+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 get(
+        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(&this.snapshot).await {
+                        Ok(snapshot) => {
+                            this.snapshot = Arc::new(snapshot);
+                        },
+
+                        Err(err) => {
+                            cancellation_token.cancel();
+                            return Err(err.into());
+                        }
+                    }
+                }
+
+                _ = cancellation_token.cancelled() => {
+                    return Ok(());
+                }
+            }
+        }
+    }
+
+    async fn get_schedule(&self) -> Arc<ScheduleSnapshot> {
+        self.inner.read().await.snapshot.clone()
+    }
+}

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

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

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

@@ -0,0 +1,894 @@
+use crate::or_continue;
+use crate::parser::error::{Error, ErrorCell, ErrorCellPos};
+use crate::parser::worksheet::WorkSheet;
+use crate::parser::LessonParseResult::{Lessons, Street};
+use base::LessonType::Break;
+use base::{
+    Day, Lesson, LessonBoundaries, LessonSubGroup, LessonType, ParsedSchedule, ScheduleEntry,
+};
+use calamine::{open_workbook_from_rs, Reader, Xls};
+use chrono::{DateTime, Duration, NaiveDate, NaiveTime, Utc};
+use regex::Regex;
+use std::collections::HashMap;
+use std::io::Cursor;
+use std::sync::LazyLock;
+
+mod macros;
+mod worksheet;
+
+pub mod error {
+    use derive_more::{Display, Error};
+    use serde::{Serialize, Serializer};
+    use std::sync::Arc;
+    use utoipa::ToSchema;
+
+    #[derive(Clone, Debug, Display, Error, ToSchema)]
+    #[display("row {row}, column {column}")]
+    pub struct ErrorCellPos {
+        pub row: u32,
+        pub column: u32,
+    }
+
+    #[derive(Clone, Debug, Display, Error, ToSchema)]
+    #[display("'{data}' at {pos}")]
+    pub struct ErrorCell {
+        pub pos: ErrorCellPos,
+        pub data: String,
+    }
+
+    impl ErrorCell {
+        pub fn new(row: u32, column: u32, data: String) -> Self {
+            Self {
+                pos: ErrorCellPos { row, column },
+                data,
+            }
+        }
+    }
+
+    #[derive(Clone, Debug, Display, Error, ToSchema)]
+    pub enum Error {
+        /// Errors related to reading XLS file.
+        #[display("{_0:?}: Failed to read XLS file.")]
+        #[schema(value_type = String)]
+        BadXLS(Arc<calamine::XlsError>),
+
+        /// Not a single sheet was found.
+        #[display("No work sheets found.")]
+        NoWorkSheets,
+
+        /// There are no data on the boundaries of the sheet.
+        #[display("There is no data on work sheet boundaries.")]
+        UnknownWorkSheetRange,
+
+        /// Failed to read the beginning and end of the lesson from the cell
+        #[display("Failed to read lesson start and end from {_0}.")]
+        LessonBoundaries(ErrorCell),
+
+        /// Not found the beginning and the end corresponding to the lesson.
+        #[display("No start and end times matching the lesson (at {_0}) was found.")]
+        LessonTimeNotFound(ErrorCellPos),
+    }
+
+    impl Serialize for Error {
+        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+        where
+            S: Serializer,
+        {
+            match self {
+                Error::BadXLS(_) => serializer.serialize_str("BAD_XLS"),
+                Error::NoWorkSheets => serializer.serialize_str("NO_WORK_SHEETS"),
+                Error::UnknownWorkSheetRange => {
+                    serializer.serialize_str("UNKNOWN_WORK_SHEET_RANGE")
+                }
+                Error::LessonBoundaries(_) => serializer.serialize_str("GLOBAL_TIME"),
+                Error::LessonTimeNotFound(_) => serializer.serialize_str("LESSON_TIME_NOT_FOUND"),
+            }
+        }
+    }
+}
+
+/// Data cell storing the group name.
+pub struct GroupCellInfo {
+    /// Column index.
+    pub column: u32,
+
+    /// Text in the cell.
+    pub name: String,
+}
+
+/// Data cell storing the line.
+pub struct DayCellInfo {
+    /// Line index.
+    pub row: u32,
+
+    /// Column index.
+    pub column: u32,
+
+    /// Day name.
+    pub name: String,
+
+    /// Date of the day.
+    pub date: DateTime<Utc>,
+}
+
+/// Data on the time of lessons from the second column of the schedule.
+pub struct BoundariesCellInfo {
+    /// Temporary segment of the lesson.
+    pub time_range: LessonBoundaries,
+
+    /// Type of lesson.
+    pub lesson_type: LessonType,
+
+    /// The lesson index.
+    pub default_index: Option<u32>,
+
+    /// The frame of the cell.
+    pub xls_range: ((u32, u32), (u32, u32)),
+}
+/// Obtaining a "skeleton" schedule from the working sheet.
+fn parse_skeleton(
+    worksheet: &WorkSheet,
+) -> Result<(Vec<DayCellInfo>, Vec<GroupCellInfo>), crate::parser::error::Error> {
+    let mut groups: Vec<GroupCellInfo> = Vec::new();
+    let mut days: Vec<(u32, String, Option<DateTime<Utc>>)> = Vec::new();
+
+    let worksheet_start = worksheet
+        .start()
+        .ok_or(error::Error::UnknownWorkSheetRange)?;
+    let worksheet_end = worksheet.end().ok_or(error::Error::UnknownWorkSheetRange)?;
+
+    let mut row = worksheet_start.0;
+
+    while row < worksheet_end.0 {
+        row += 1;
+
+        let day_full_name = or_continue!(worksheet.get_string_from_cell(row, 0));
+
+        // parse groups row when days column will found
+        if groups.is_empty() {
+            // переход на предыдущую строку
+            row -= 1;
+
+            for column in (worksheet_start.1 + 2)..=worksheet_end.1 {
+                groups.push(GroupCellInfo {
+                    column,
+                    name: or_continue!(worksheet.get_string_from_cell(row, column))
+                        .replace(" ", ""),
+                });
+            }
+
+            // возврат на текущую строку
+            row += 1;
+        }
+
+        let (day_name, day_date) = {
+            let space_index = match day_full_name.find(' ') {
+                Some(index) => {
+                    if index < 10 {
+                        break;
+                    } else {
+                        index
+                    }
+                }
+                None => break,
+            };
+
+            let name = day_full_name[..space_index].to_string();
+
+            let date_slice = &day_full_name[space_index + 1..];
+            let date = NaiveDate::parse_from_str(date_slice, "%d.%m.%Y")
+                .map(|date| date.and_time(NaiveTime::default()).and_utc())
+                .ok();
+
+            (name, date)
+        };
+
+        days.push((row, day_name, day_date));
+    }
+
+    // fix unparsable day dates
+    let days_max = days.len().min(5);
+
+    for i in 0..days_max {
+        if days[i].2.is_none() && days[i + 1].2.is_some() {
+            days[i].2 = Some(days[i + 1].2.unwrap() - Duration::days(1));
+        }
+    }
+
+    for i in 0..days_max {
+        let i = days_max - i;
+
+        if days[i - 1].2.is_none() && days[i].2.is_some() {
+            days[i - 1].2 = Some(days[i].2.unwrap() - Duration::days(1));
+        }
+    }
+
+    let days = days
+        .into_iter()
+        .map(|day| DayCellInfo {
+            row: day.0,
+            column: 0,
+            name: day.1,
+            date: day.2.unwrap(),
+        })
+        .collect();
+
+    Ok((days, groups))
+}
+
+/// The result of obtaining a lesson from the cell.
+enum LessonParseResult {
+    /// List of lessons long from one to two.
+    ///
+    /// The number of lessons will be equal to one if the couple is the first in the day,
+    /// otherwise the list from the change template and the lesson itself will be returned.
+    Lessons(Vec<Lesson>),
+
+    /// Street on which the Polytechnic Corps is located.
+    Street(String),
+}
+
+// noinspection GrazieInspection
+/// Obtaining a non-standard type of lesson by name.
+fn guess_lesson_type(text: &str) -> Option<LessonType> {
+    static MAP: LazyLock<HashMap<&str, LessonType>> = LazyLock::new(|| {
+        HashMap::from([
+            ("консультация", LessonType::Consultation),
+            ("самостоятельная работа", LessonType::IndependentWork),
+            ("зачет", LessonType::Exam),
+            ("зачет с оценкой", LessonType::ExamWithGrade),
+            ("экзамен", LessonType::ExamDefault),
+            ("курсовой проект", LessonType::CourseProject),
+            ("защита курсового проекта", LessonType::CourseProjectDefense),
+        ])
+    });
+
+    let name_lower = text.to_lowercase();
+
+    MAP.iter()
+        .map(|(text, lesson_type)| (lesson_type, strsim::levenshtein(text, &name_lower)))
+        .filter(|x| x.1 <= 4)
+        .min_by_key(|(_, score)| *score)
+        .map(|v| v.0.clone())
+}
+
+/// Getting a pair or street from a cell.
+fn parse_lesson(
+    worksheet: &WorkSheet,
+    day: &Day,
+    day_boundaries: &[BoundariesCellInfo],
+    lesson_boundaries: &BoundariesCellInfo,
+    group_column: u32,
+) -> Result<LessonParseResult, crate::parser::error::Error> {
+    let row = lesson_boundaries.xls_range.0.0;
+
+    let name = {
+        let cell_data = match worksheet.get_string_from_cell(row, group_column) {
+            Some(x) => x,
+            None => return Ok(Lessons(Vec::new())),
+        };
+
+        static OTHER_STREET_RE: LazyLock<Regex> =
+            LazyLock::new(|| Regex::new(r"^[А-Я][а-я]+[,\s]\d+$").unwrap());
+
+        if OTHER_STREET_RE.is_match(&cell_data) {
+            return Ok(Street(cell_data));
+        }
+
+        cell_data
+    };
+
+    let cell_range = worksheet.get_merge_from_start(row, group_column);
+
+    let (default_range, lesson_time) = {
+        let end_time_arr = day_boundaries
+            .iter()
+            .filter(|time| time.xls_range.1.0 == cell_range.1.0)
+            .collect::<Vec<&BoundariesCellInfo>>();
+
+        let end_time = end_time_arr
+            .first()
+            .ok_or(error::Error::LessonTimeNotFound(ErrorCellPos {
+                row,
+                column: group_column,
+            }))?;
+
+        let range: Option<[u8; 2]> = if lesson_boundaries.default_index.is_some() {
+            let default = lesson_boundaries.default_index.unwrap() as u8;
+            Some([default, end_time.default_index.unwrap() as u8])
+        } else {
+            None
+        };
+
+        let time = LessonBoundaries {
+            start: lesson_boundaries.time_range.start,
+            end: end_time.time_range.end,
+        };
+
+        Ok((range, time))
+    }?;
+
+    let ParsedLessonName {
+        name,
+        mut subgroups,
+        r#type: lesson_type,
+    } = parse_name_and_subgroups(&name)?;
+
+    {
+        let cabinets: Vec<String> = parse_cabinets(
+            worksheet,
+            (cell_range.0.0, cell_range.1.0),
+            group_column + 1,
+        );
+
+        let cab_count = cabinets.len();
+
+        if cab_count == 1 {
+            // Назначаем этот кабинет всем подгруппам
+            let cab = Some(cabinets.first().unwrap().clone());
+
+            for subgroup in subgroups.iter_mut().flatten() {
+                subgroup.cabinet = cab.clone()
+            }
+        } else if cab_count == 2 {
+            while subgroups.len() < cab_count {
+                subgroups.push(subgroups.last().unwrap_or(&None).clone());
+            }
+
+            for i in 0..cab_count {
+                let subgroup = subgroups.get_mut(i).unwrap();
+                let cabinet = Some(cabinets.get(i).unwrap().clone());
+
+                match subgroup {
+                    None => {
+                        let _ = subgroup.insert(LessonSubGroup {
+                            teacher: None,
+                            cabinet,
+                        });
+                    }
+                    Some(subgroup) => {
+                        subgroup.cabinet = cabinet;
+                    }
+                }
+            }
+        }
+    };
+
+    let lesson = Lesson {
+        lesson_type: lesson_type.unwrap_or(lesson_boundaries.lesson_type.clone()),
+        range: default_range,
+        name: Some(name),
+        time: lesson_time,
+        subgroups: if subgroups.len() == 2 && subgroups.iter().all(|x| x.is_none()) {
+            None
+        } else {
+            Some(subgroups)
+        },
+        group: None,
+    };
+
+    let prev_lesson = if day.lessons.is_empty() {
+        return Ok(Lessons(Vec::from([lesson])));
+    } else {
+        &day.lessons[day.lessons.len() - 1]
+    };
+
+    Ok(Lessons(Vec::from([
+        Lesson {
+            lesson_type: Break,
+            range: None,
+            name: None,
+            time: LessonBoundaries {
+                start: prev_lesson.time.end,
+                end: lesson.time.start,
+            },
+            subgroups: Some(Vec::new()),
+            group: None,
+        },
+        lesson,
+    ])))
+}
+
+/// Obtaining a list of cabinets to the right of the lesson cell.
+fn parse_cabinets(worksheet: &WorkSheet, row_range: (u32, u32), column: u32) -> Vec<String> {
+    let mut cabinets: Vec<String> = Vec::new();
+
+    for row in row_range.0..row_range.1 {
+        let raw = or_continue!(worksheet.get_string_from_cell(row, column));
+
+        let clean = raw.replace("\n", " ");
+        let parts: Vec<&str> = clean.split(" ").collect();
+
+        parts.iter().take(2).for_each(|part| {
+            let clean_part = part.to_string().trim().to_string();
+
+            cabinets.push(clean_part);
+        });
+
+        break;
+    }
+
+    cabinets
+}
+
+struct ParsedLessonName {
+    name: String,
+    subgroups: Vec<Option<LessonSubGroup>>,
+    r#type: Option<LessonType>,
+}
+
+//noinspection GrazieInspection
+/// Getting the "pure" name of the lesson and list of teachers from the text of the lesson cell.
+fn parse_name_and_subgroups(text: &str) -> Result<ParsedLessonName, Error> {
+    // Части названия пары:
+    // 1. Само название.
+    // 2. Список преподавателей и подгрупп.
+    // 3. "Модификатор" (чаще всего).
+    //
+    // Регулярное выражение для получения ФИО преподавателей и номеров подгрупп (aka. второй части).
+    // (?:[А-Я][а-я]+\s?(?:[А-Я][\s.]*){2}(?:\(\d\s?[а-я]+\))?(?:, )?)+[\s.]*
+    //
+    // Подробнее:
+    // (?:
+    //     [А-Я][а-я]+         - Фамилия.
+    //     \s?                 - Кто знает, будет ли там пробел.
+    //     (?:[А-Я][\s.]*){2}  - Имя и отчество с учётом случайных пробелов и точек.
+    //     (?:
+    //         \(              - Открытие подгруппы.
+    //         \s?             - Кто знает, будет ли там пробел.
+    //         \d              - Номер подгруппы.
+    //         \s?             - Кто знает, будет ли там пробел.
+    //         [а-я\s]+        - Слово "подгруппа" с учётов ошибок.
+    //         \)              - Закрытие подгруппы.
+    //     )?                  - Явное указание подгруппы может отсутствовать по понятным причинам.
+    //     (?:, )?             - Разделители между отдельными частями.
+    // )+
+    // [\s.]*                  - Забираем с собой всякий мусор, что бы не передать его в третью часть.
+
+    static NAMES_REGEX: LazyLock<Regex> = LazyLock::new(|| {
+        Regex::new(
+            r"(?:[А-Я][а-я]+\s?(?:[А-Я][\s.]*){2}(?:\(\s*\d\s*[а-я\s]+\))?(?:[\s,]+)?){1,2}+[\s.,]*",
+        )
+            .unwrap()
+    });
+
+    // Отчистка
+    static CLEAN_RE: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"[\s\n\t]+").unwrap());
+
+    let text = CLEAN_RE
+        .replace(&text.replace([' ', '\t', '\n'], " "), " ")
+        .to_string();
+
+    let (lesson_name, subgroups, lesson_type) = match NAMES_REGEX.captures(&text) {
+        Some(captures) => {
+            let capture = captures.get(0).unwrap();
+
+            let subgroups: Vec<Option<LessonSubGroup>> = {
+                let src = capture.as_str().replace([' ', '.'], "");
+
+                let mut shared_subgroup = false;
+                let mut subgroups: [Option<LessonSubGroup>; 2] = [None, None];
+
+                for name in src.split(',') {
+                    let open_bracket_index = name.find('(');
+
+                    let number: u8 = open_bracket_index
+                        .map_or(0, |index| name[(index + 1)..(index + 2)].parse().unwrap());
+
+                    let teacher_name = {
+                        let name_end = open_bracket_index.unwrap_or(name.len());
+
+                        // Я ебал. Как же я долго до этого доходил.
+                        format!(
+                            "{} {}.{}.",
+                            name.get(..name_end - 4).unwrap(),
+                            name.get(name_end - 4..name_end - 2).unwrap(),
+                            name.get(name_end - 2..name_end).unwrap(),
+                        )
+                    };
+
+                    let lesson = Some(LessonSubGroup {
+                        cabinet: None,
+                        teacher: Some(teacher_name),
+                    });
+
+                    match number {
+                        0 => {
+                            subgroups[0] = lesson;
+                            subgroups[1] = None;
+                            shared_subgroup = true;
+                            break;
+                        }
+                        num => {
+                            // 1 - 1 = 0 | 2 - 1 = 1 | 3 - 1 = 2 (schedule index to array index)
+                            // 0 % 2 = 0 | 1 % 2 = 1 | 2 % 2 = 0 (clamp)
+                            let normalised = (num - 1) % 2;
+
+                            subgroups[normalised as usize] = lesson;
+                        }
+                    }
+                }
+
+                if shared_subgroup {
+                    Vec::from([subgroups[0].take()])
+                } else {
+                    Vec::from(subgroups)
+                }
+            };
+
+            let name = text[..capture.start()].trim().to_string();
+            let extra = text[capture.end()..].trim().to_string();
+
+            let lesson_type = if extra.len() > 4 {
+                let result = guess_lesson_type(&extra);
+
+                if result.is_none() {
+                    #[cfg(not(debug_assertions))]
+                    sentry::capture_message(
+                        &*format!("Не удалось угадать тип пары '{}'!", extra),
+                        sentry::Level::Warning,
+                    );
+
+                    #[cfg(debug_assertions)]
+                    log::warn!("Не удалось угадать тип пары '{}'!", extra);
+                }
+
+                result
+            } else {
+                None
+            };
+
+            (name, subgroups, lesson_type)
+        }
+        None => (text, Vec::new(), None),
+    };
+
+    Ok(ParsedLessonName {
+        name: lesson_name,
+        subgroups,
+        r#type: lesson_type,
+    })
+}
+
+/// Getting the start and end of a pair from a cell in the first column of a document.
+///
+/// # Arguments
+///
+/// * `cell_data`: text in cell.
+/// * `date`: date of the current day.
+fn parse_lesson_boundaries_cell(cell_data: &str, date: DateTime<Utc>) -> Option<LessonBoundaries> {
+    static TIME_RE: LazyLock<Regex> =
+        LazyLock::new(|| Regex::new(r"(\d+\.\d+)-(\d+\.\d+)").unwrap());
+
+    let parse_res = TIME_RE.captures(cell_data)?;
+
+    let start_match = parse_res.get(1).unwrap().as_str();
+    let start_parts: Vec<&str> = start_match.split(".").collect();
+
+    let end_match = parse_res.get(2).unwrap().as_str();
+    let end_parts: Vec<&str> = end_match.split(".").collect();
+
+    static GET_TIME: fn(DateTime<Utc>, &Vec<&str>) -> DateTime<Utc> = |date, parts| {
+        date + Duration::hours(parts[0].parse::<i64>().unwrap() - 4)
+            + Duration::minutes(parts[1].parse::<i64>().unwrap())
+    };
+
+    Some(LessonBoundaries {
+        start: GET_TIME(date, &start_parts),
+        end: GET_TIME(date, &end_parts),
+    })
+}
+
+/// Parse the column of the document to obtain a list of day's lesson boundaries.
+///
+/// # Arguments
+///
+/// * `worksheet`: document.
+/// * `date`: date of the current day.
+/// * `row_range`: row boundaries of the current day.
+/// * `column`: column with the required data.
+fn parse_day_boundaries(
+    worksheet: &WorkSheet,
+    date: DateTime<Utc>,
+    row_range: (u32, u32),
+    column: u32,
+) -> Result<Vec<BoundariesCellInfo>, crate::parser::error::Error> {
+    let mut day_times: Vec<BoundariesCellInfo> = Vec::new();
+
+    for row in row_range.0..row_range.1 {
+        let time_cell = if let Some(str) = worksheet.get_string_from_cell(row, column) {
+            str
+        } else {
+            continue;
+        };
+
+        let lesson_time = parse_lesson_boundaries_cell(&time_cell, date).ok_or(
+            error::Error::LessonBoundaries(ErrorCell::new(row, column, time_cell.clone())),
+        )?;
+
+        // type
+        let lesson_type = if time_cell.contains("пара") {
+            LessonType::Default
+        } else {
+            LessonType::Additional
+        };
+
+        // lesson index
+        let default_index = if lesson_type == LessonType::Default {
+            Some(
+                time_cell
+                    .chars()
+                    .next()
+                    .unwrap()
+                    .to_string()
+                    .parse::<u32>()
+                    .unwrap(),
+            )
+        } else {
+            None
+        };
+
+        day_times.push(BoundariesCellInfo {
+            time_range: lesson_time,
+            lesson_type,
+            default_index,
+            xls_range: worksheet.get_merge_from_start(row, column),
+        });
+    }
+
+    Ok(day_times)
+}
+
+/// Parse the column of the document to obtain a list of week's lesson boundaries.
+///
+/// # Arguments
+///
+/// * `worksheet`: document.
+/// * `week_markup`: markup of the current week.
+fn parse_week_boundaries(
+    worksheet: &WorkSheet,
+    week_markup: &[DayCellInfo],
+) -> Result<Vec<Vec<BoundariesCellInfo>>, crate::parser::error::Error> {
+    let mut result: Vec<Vec<BoundariesCellInfo>> = Vec::new();
+
+    let worksheet_end_row = worksheet.end().unwrap().0;
+    let lesson_time_column = week_markup[0].column + 1;
+
+    for day_index in 0..week_markup.len() {
+        let day_markup = &week_markup[day_index];
+
+        // Если текущий день не последнему, то индекс строки следующего дня.
+        // Если текущий день - последний, то индекс последней строки документа.
+        let end_row = if day_index != week_markup.len() - 1 {
+            week_markup[day_index + 1].row
+        } else {
+            worksheet_end_row
+        };
+
+        let day_boundaries = parse_day_boundaries(
+            worksheet,
+            day_markup.date,
+            (day_markup.row, end_row),
+            lesson_time_column,
+        )?;
+
+        result.push(day_boundaries);
+    }
+
+    Ok(result)
+}
+
+/// Conversion of the list of couples of groups in the list of lessons of teachers.
+fn convert_groups_to_teachers(
+    groups: &HashMap<String, ScheduleEntry>,
+) -> HashMap<String, ScheduleEntry> {
+    let mut teachers: HashMap<String, ScheduleEntry> = HashMap::new();
+
+    let empty_days: Vec<Day> = groups
+        .values()
+        .next()
+        .unwrap()
+        .days
+        .iter()
+        .map(|day| Day {
+            name: day.name.clone(),
+            street: day.street.clone(),
+            date: day.date,
+            lessons: vec![],
+        })
+        .collect();
+
+    for group in groups.values() {
+        for (index, day) in group.days.iter().enumerate() {
+            for group_lesson in &day.lessons {
+                if group_lesson.lesson_type == Break {
+                    continue;
+                }
+
+                if group_lesson.subgroups.is_none() {
+                    continue;
+                }
+
+                let subgroups = group_lesson.subgroups.as_ref().unwrap();
+
+                for subgroup in subgroups {
+                    let teacher = match subgroup {
+                        None => continue,
+                        Some(subgroup) => match &subgroup.teacher {
+                            None => continue,
+                            Some(teacher) => teacher,
+                        },
+                    };
+
+                    if teacher == "Ошибка в расписании" {
+                        continue;
+                    }
+
+                    if !teachers.contains_key(teacher) {
+                        teachers.insert(
+                            teacher.clone(),
+                            ScheduleEntry {
+                                name: teacher.clone(),
+                                days: empty_days.to_vec(),
+                            },
+                        );
+                    }
+
+                    let teacher_day = teachers
+                        .get_mut(teacher)
+                        .unwrap()
+                        .days
+                        .get_mut(index)
+                        .unwrap();
+
+                    teacher_day.lessons.push({
+                        let mut lesson = group_lesson.clone();
+                        lesson.group = Some(group.name.clone());
+
+                        lesson
+                    });
+                }
+            }
+        }
+    }
+
+    teachers.iter_mut().for_each(|(_, teacher)| {
+        teacher.days.iter_mut().for_each(|day| {
+            day.lessons
+                .sort_by(|a, b| a.range.as_ref().unwrap()[1].cmp(&b.range.as_ref().unwrap()[1]))
+        })
+    });
+
+    teachers
+}
+
+/// Reading XLS Document from the buffer and converting it into the schedule ready to use.
+///
+/// # Arguments
+///
+/// * `buffer`: XLS data containing schedule.
+///
+/// returns: Result<ParseResult, crate::parser::error::Error>
+pub fn parse_xls(buffer: &Vec<u8>) -> Result<ParsedSchedule, crate::parser::error::Error> {
+    let cursor = Cursor::new(&buffer);
+    let mut workbook: Xls<_> =
+        open_workbook_from_rs(cursor).map_err(|e| error::Error::BadXLS(std::sync::Arc::new(e)))?;
+
+    let worksheet = {
+        let (worksheet_name, worksheet) = workbook
+            .worksheets()
+            .first()
+            .ok_or(error::Error::NoWorkSheets)?
+            .clone();
+
+        let worksheet_merges = workbook
+            .worksheet_merge_cells(&worksheet_name)
+            .ok_or(error::Error::NoWorkSheets)?;
+
+        WorkSheet {
+            data: worksheet,
+            merges: worksheet_merges,
+        }
+    };
+
+    let (week_markup, groups_markup) = parse_skeleton(&worksheet)?;
+    let week_boundaries = parse_week_boundaries(&worksheet, &week_markup)?;
+
+    let mut groups: HashMap<String, ScheduleEntry> = HashMap::new();
+
+    for group_markup in groups_markup {
+        let mut group = ScheduleEntry {
+            name: group_markup.name,
+            days: Vec::new(),
+        };
+
+        for day_index in 0..week_markup.len() {
+            let day_markup = &week_markup[day_index];
+
+            let mut day = Day {
+                name: day_markup.name.clone(),
+                street: None,
+                date: day_markup.date,
+                lessons: Vec::new(),
+            };
+
+            let day_boundaries = &week_boundaries[day_index];
+
+            for lesson_boundaries in day_boundaries {
+                match &mut parse_lesson(
+                    &worksheet,
+                    &day,
+                    day_boundaries,
+                    lesson_boundaries,
+                    group_markup.column,
+                )? {
+                    Lessons(lesson) => day.lessons.append(lesson),
+                    Street(street) => day.street = Some(street.to_owned()),
+                }
+            }
+
+            group.days.push(day);
+        }
+
+        groups.insert(group.name.clone(), group);
+    }
+
+    Ok(ParsedSchedule {
+        teachers: convert_groups_to_teachers(&groups),
+        groups,
+    })
+}
+
+#[cfg(any(test, feature = "test"))]
+pub mod test_utils {
+    use super::*;
+    use base::ParsedSchedule;
+
+    pub fn test_result() -> Result<ParsedSchedule, crate::parser::error::Error> {
+        parse_xls(&include_bytes!("../../../../test-data/engels-polytechnic.xls").to_vec())
+    }
+}
+
+#[cfg(test)]
+pub mod tests {
+    #[test]
+    fn read() {
+        let result = super::test_utils::test_result();
+
+        assert!(result.is_ok(), "{}", result.err().unwrap());
+
+        assert_ne!(result.as_ref().unwrap().groups.len(), 0);
+        assert_ne!(result.as_ref().unwrap().teachers.len(), 0);
+    }
+
+    #[test]
+    fn test_split_lesson() {
+        let result = super::test_utils::test_result();
+        assert!(result.is_ok(), "{}", result.err().unwrap());
+
+        let result = result.unwrap();
+        assert!(result.groups.contains_key("ИС-214/23"));
+
+        let group = result.groups.get("ИС-214/23").unwrap();
+
+        let thursday = group.days.get(3).unwrap();
+        assert_eq!(thursday.lessons.len(), 1);
+
+        let lesson = &thursday.lessons[0];
+        assert_eq!(lesson.range.unwrap()[1], 3);
+        assert!(lesson.subgroups.is_some());
+
+        let subgroups = lesson.subgroups.as_ref().unwrap();
+        assert_eq!(subgroups.len(), 2);
+
+        assert_eq!(
+            subgroups[0].as_ref().unwrap().cabinet,
+            Some("44".to_string())
+        );
+
+        assert_eq!(
+            subgroups[1].as_ref().unwrap().cabinet,
+            Some("43".to_string())
+        );
+    }
+}

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

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

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

@@ -0,0 +1,263 @@
+use crate::parser::parse_xls;
+use crate::updater::error::{Error, QueryUrlError, SnapshotCreationError};
+use crate::xls_downloader::{FetchError, XlsDownloader};
+use base::ScheduleSnapshot;
+
+pub enum UpdateSource {
+    Prepared(ScheduleSnapshot),
+
+    Url(String),
+
+    GrabFromSite {
+        yandex_api_key: String,
+        yandex_func_id: String,
+    },
+}
+
+pub struct Updater {
+    downloader: XlsDownloader,
+    update_source: UpdateSource,
+}
+
+pub mod error {
+    use crate::xls_downloader::FetchError;
+    use derive_more::{Display, Error};
+
+    #[derive(Debug, Display, Error)]
+    pub enum Error {
+        /// An error occurred while querying the Yandex Cloud API for a URL.
+        ///
+        /// This may result from network failures, invalid API credentials, or issues with the Yandex Cloud Function invocation.
+        /// See [`QueryUrlError`] for more details about specific causes.
+        QueryUrlFailed(QueryUrlError),
+
+        /// The schedule snapshot creation process failed.
+        ///
+        /// This can happen due to URL conflicts (same URL already in use), failed network requests,
+        /// download errors, or invalid XLS file content. See [`SnapshotCreationError`] for details.
+        SnapshotCreationFailed(SnapshotCreationError),
+    }
+    /// Errors that may occur when querying the Yandex Cloud API to retrieve a URL.
+    #[derive(Debug, Display, Error)]
+    pub enum QueryUrlError {
+        /// Occurs when the request to the Yandex Cloud API fails.
+        ///
+        /// This may be due to network issues, invalid API key, incorrect function ID, or other
+        /// problems with the Yandex Cloud Function invocation.
+        #[display("An error occurred during the request to the Yandex Cloud API: {_0}")]
+        RequestFailed(reqwest::Error),
+    }
+
+    /// Errors that may occur during the creation of a schedule snapshot.
+    #[derive(Debug, Display, Error)]
+    pub enum SnapshotCreationError {
+        /// The URL is the same as the one already being used (no update needed).
+        #[display("The URL is the same as the one already being used.")]
+        SameUrl,
+
+        /// The URL query for the XLS file failed to execute, either due to network issues or invalid API parameters.
+        #[display("Failed to fetch URL: {_0}")]
+        FetchFailed(FetchError),
+
+        /// Downloading the XLS file content failed after successfully obtaining the URL.
+        #[display("Download failed: {_0}")]
+        DownloadFailed(FetchError),
+
+        /// The XLS file could not be parsed into a valid schedule format.
+        #[display("Schedule data is invalid: {_0}")]
+        InvalidSchedule(crate::parser::error::Error),
+    }
+}
+
+impl Updater {
+    /// Constructs a new `ScheduleSnapshot` by downloading and parsing schedule data from the specified URL.
+    ///
+    /// This method first checks if the provided URL is the same as the one already configured in the downloader.
+    /// If different, it updates the downloader's URL, fetches the XLS content, parses it, and creates a snapshot.
+    /// Errors are returned for URL conflicts, network issues, download failures, or invalid data.
+    ///
+    /// # Arguments
+    ///
+    /// * `downloader`: A mutable reference to an `XLSDownloader` implementation used to fetch and parse the schedule data.
+    /// * `url`: The source URL pointing to the XLS file containing schedule data.
+    ///
+    /// returns: Result<ScheduleSnapshot, SnapshotCreationError>
+    pub async fn new_snapshot(
+        downloader: &mut XlsDownloader,
+        url: String,
+    ) -> Result<ScheduleSnapshot, SnapshotCreationError> {
+        if downloader.url.as_ref().is_some_and(|_url| _url.eq(&url)) {
+            return Err(SnapshotCreationError::SameUrl);
+        }
+
+        let head_result = downloader.set_url(&url).await.map_err(|error| {
+            if let FetchError::Unknown(error) = &error {
+                sentry::capture_error(&error);
+            }
+
+            SnapshotCreationError::FetchFailed(error)
+        })?;
+
+        let xls_data = downloader
+            .fetch(false)
+            .await
+            .map_err(|error| {
+                if let FetchError::Unknown(error) = &error {
+                    sentry::capture_error(&error);
+                }
+
+                SnapshotCreationError::DownloadFailed(error)
+            })?
+            .data
+            .unwrap();
+
+        let parse_result = parse_xls(&xls_data).map_err(|error| {
+            sentry::capture_error(&error);
+
+            SnapshotCreationError::InvalidSchedule(error)
+        })?;
+
+        Ok(ScheduleSnapshot {
+            fetched_at: head_result.requested_at,
+            updated_at: head_result.uploaded_at,
+            url,
+            data: parse_result,
+        })
+    }
+
+    /// Queries the Yandex Cloud Function (FaaS) to obtain a URL for the schedule file.
+    ///
+    /// This sends a POST request to the specified Yandex Cloud Function endpoint,
+    /// using the provided API key for authentication. The returned URI is combined
+    /// with the "https://politehnikum-eng.ru" base domain to form the complete URL.
+    ///
+    /// # Arguments
+    ///
+    /// * `api_key` - Authentication token for Yandex Cloud API
+    /// * `func_id` - ID of the target Yandex Cloud Function to invoke
+    ///
+    /// # Returns
+    ///
+    /// Result containing:
+    /// - `Ok(String)` - Complete URL constructed from the Function's response
+    /// - `Err(QueryUrlError)` - If the request or response processing fails
+    async fn query_url(api_key: &str, func_id: &str) -> Result<String, QueryUrlError> {
+        let client = reqwest::Client::new();
+
+        let uri = client
+            .post(format!(
+                "https://functions.yandexcloud.net/{}?integration=raw",
+                func_id
+            ))
+            .header("Authorization", format!("Api-Key {}", api_key))
+            .send()
+            .await
+            .map_err(QueryUrlError::RequestFailed)?
+            .text()
+            .await
+            .map_err(QueryUrlError::RequestFailed)?;
+
+        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::QueryUrlFailed)?
+            }
+            _ => 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::SnapshotCreationFailed)?;
+
+        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::QueryUrlFailed)?,
+            _ => 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 result.is_ok() {
+            self.url = Some(url.to_string());
+        }
+
+        result
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::xls_downloader::{FetchError, XlsDownloader};
+
+    #[tokio::test]
+    async fn bad_url() {
+        let url = "bad_url";
+
+        let mut downloader = XlsDownloader::new();
+        assert!(downloader.set_url(url).await.is_err());
+    }
+
+    #[tokio::test]
+    async fn bad_status_code() {
+        let url = "https://www.google.com/not-found";
+
+        let mut downloader = XlsDownloader::new();
+        assert_eq!(
+            downloader.set_url(url).await,
+            Err(FetchError::bad_status_code(404))
+        );
+    }
+
+    #[tokio::test]
+    async fn bad_headers() {
+        let url = "https://www.google.com/favicon.ico";
+
+        let mut downloader = XlsDownloader::new();
+        assert_eq!(
+            downloader.set_url(url).await,
+            Err(FetchError::BadHeaders {
+                expected_header: "ETag".to_string(),
+            })
+        );
+    }
+
+    #[tokio::test]
+    async fn bad_content_type() {
+        let url = "https://s3.aero-storage.ldragol.ru/679e5d1145a6ad00843ad3f1/67ddb59fd46303008396ac96%2Fexample.txt";
+
+        let mut downloader = XlsDownloader::new();
+        assert!(downloader.set_url(url).await.is_err());
+    }
+
+    #[tokio::test]
+    async fn ok() {
+        let url = "https://s3.aero-storage.ldragol.ru/679e5d1145a6ad00843ad3f1/67ddb5fad46303008396ac97%2Fschedule.xls";
+
+        let mut downloader = XlsDownloader::new();
+        assert!(downloader.set_url(url).await.is_ok());
+    }
+
+    #[tokio::test]
+    async fn downloader_ok() {
+        let url = "https://s3.aero-storage.ldragol.ru/679e5d1145a6ad00843ad3f1/67ddb5fad46303008396ac97%2Fschedule.xls";
+
+        let mut downloader = XlsDownloader::new();
+        assert!(downloader.set_url(url).await.is_ok());
+        assert!(downloader.fetch(false).await.is_ok());
+    }
+
+    #[tokio::test]
+    async fn downloader_no_url_provided() {
+        let downloader = XlsDownloader::new();
+
+        let result = downloader.fetch(false).await;
+        assert_eq!(result, Err(FetchError::NoUrlProvided));
+    }
+}

providers/src/lib.rs

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

src/extractors/authorized_user.rs

@@ -0,0 +1,107 @@
+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::{web, HttpRequest};
+use database::entity::User;
+use database::query::Query;
+use derive_more::Display;
+use serde::{Deserialize, Serialize};
+use std::fmt::Debug;
+
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Display, MiddlewareError)]
+#[status_code = "actix_web::http::StatusCode::UNAUTHORIZED"]
+#[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+pub enum Error {
+    /// There is no Authorization header or cookie in the request.
+    #[display("No Authorization header or cookie found")]
+    NoHeaderOrCookieFound,
+
+    /// Unknown authorization type other than Bearer.
+    #[display("Bearer token is required")]
+    UnknownAuthorizationType,
+
+    /// Invalid or expired access token.
+    #[display("Invalid or expired access token")]
+    InvalidAccessToken,
+
+    /// The user bound to the token is not found in the database.
+    #[display("No user associated with access token")]
+    NoUser,
+}
+
+impl Error {
+    pub fn into_err(self) -> actix_web::Error {
+        actix_web::Error::from(self)
+    }
+}
+
+fn get_access_token_from_header(req: &HttpRequest) -> Result<String, Error> {
+    let header_value = req
+        .headers()
+        .get(header::AUTHORIZATION)
+        .ok_or(Error::NoHeaderOrCookieFound)?
+        .to_str()
+        .map_err(|_| Error::NoHeaderOrCookieFound)?
+        .to_string();
+
+    let parts = header_value
+        .split_once(' ')
+        .ok_or(Error::UnknownAuthorizationType)?;
+
+    if parts.0 != "Bearer" {
+        Err(Error::UnknownAuthorizationType)
+    } else {
+        Ok(parts.1.to_string())
+    }
+}
+
+fn get_access_token_from_cookies(req: &HttpRequest) -> Result<String, Error> {
+    let cookie = req
+        .cookie("access_token")
+        .ok_or(Error::NoHeaderOrCookieFound)?;
+
+    Ok(cookie.value().to_string())
+}
+
+/// User extractor from request with Bearer access token.
+impl FromRequestAsync for User {
+    type Error = actix_web::Error;
+
+    async fn from_request_async(
+        req: &HttpRequest,
+        _payload: &mut Payload,
+    ) -> Result<Self, Self::Error> {
+        let access_token = match get_access_token_from_header(req) {
+            Err(Error::NoHeaderOrCookieFound) => {
+                get_access_token_from_cookies(req).map_err(|error| error.into_err())?
+            }
+            Err(error) => {
+                return Err(error.into_err());
+            }
+            Ok(access_token) => access_token,
+        };
+
+        let user_id = jwt::verify_and_decode(&access_token)
+            .map_err(|_| Error::InvalidAccessToken.into_err())?;
+
+        let db = req
+            .app_data::<web::Data<AppState>>()
+            .unwrap()
+            .get_database();
+
+        Query::find_user_by_id(db, &user_id)
+            .await
+            .map_err(|_| Error::NoUser.into())
+            .and_then(|user| {
+                if let Some(user) = user {
+                    Ok(user)
+                } else {
+                    Err(actix_web::Error::from(Error::NoUser))
+                }
+            })
+    }
+}

src/extractors/base.rs

@@ -0,0 +1,154 @@
+use actix_web::dev::Payload;
+use actix_web::{FromRequest, HttpRequest};
+use futures_util::future::LocalBoxFuture;
+use std::future::{Ready, ready};
+use std::ops;
+
+/// # Async extractor.
+/// Asynchronous object extractor from a query.
+pub struct AsyncExtractor<T>(T);
+
+impl<T> AsyncExtractor<T> {
+    #[allow(dead_code)]
+    /// Retrieve the object extracted with the extractor.
+    pub fn into_inner(self) -> T {
+        self.0
+    }
+}
+
+impl<T> ops::Deref for AsyncExtractor<T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl<T> ops::DerefMut for AsyncExtractor<T> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
+pub trait FromRequestAsync: Sized {
+    type Error: Into<actix_web::Error>;
+
+    /// Asynchronous function for extracting data from a query.
+    ///
+    /// returns: Result<Self, Self::Error>
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// struct User {
+    ///     pub id: String,
+    ///     pub username: String,
+    /// }
+    ///
+    /// // TODO: Я вообще этот экстрактор не использую, нахуя мне тогда писать пример, если я не ебу как его использовать. Я забыл.
+    ///
+    /// #[get("/")]
+    /// fn get_user_async(
+    ///     user: web::AsyncExtractor<User>,
+    /// ) -> web::Json<User> {
+    ///     let user = user.into_inner();    
+    ///
+    ///     web::Json(user)
+    /// }
+    /// ```
+    async fn from_request_async(
+        req: &HttpRequest,
+        payload: &mut Payload,
+    ) -> Result<Self, Self::Error>;
+}
+
+impl<T: FromRequestAsync> FromRequest for AsyncExtractor<T> {
+    type Error = T::Error;
+    type Future = LocalBoxFuture<'static, Result<Self, Self::Error>>;
+
+    fn from_request(req: &HttpRequest, _payload: &mut Payload) -> Self::Future {
+        let req = req.clone();
+        let mut payload = Payload::None;
+        
+        Box::pin(async move {
+            T::from_request_async(&req, &mut payload)
+                .await
+                .map(|res| Self(res))
+        })
+    }
+}
+
+/// # Sync extractor.
+/// Synchronous object extractor from a query.
+pub struct SyncExtractor<T>(T);
+
+impl<T> SyncExtractor<T> {
+    /// Retrieving an object extracted with the extractor.
+    #[allow(unused)]
+    pub fn into_inner(self) -> T {
+        self.0
+    }
+}
+
+impl<T> ops::Deref for SyncExtractor<T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl<T> ops::DerefMut for SyncExtractor<T> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
+pub trait FromRequestSync: Sized {
+    type Error: Into<actix_web::Error>;
+
+    /// Synchronous function for extracting data from a query.
+    ///
+    /// returns: Result<Self, Self::Error>
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// struct User {
+    ///     pub id: String,
+    ///     pub username: String,
+    /// }
+    ///
+    /// impl FromRequestSync for User {
+    ///     type Error = actix_web::Error;
+    ///
+    ///     fn from_request_sync(req: &HttpRequest, _: &mut Payload) -> Result<Self, Self::Error> {
+    ///         // do magic here.
+    ///
+    ///         Ok(User {
+    ///             id: "qwerty".to_string(),
+    ///             username: "n08i40k".to_string()
+    ///         })
+    ///     }
+    /// }
+    ///
+    /// #[get("/")]
+    /// fn get_user_sync(
+    ///     user: web::SyncExtractor<User>,
+    /// ) -> web::Json<User> {
+    ///     let user = user.into_inner();    
+    ///
+    ///     web::Json(user)
+    /// }
+    /// ```
+    fn from_request_sync(req: &HttpRequest, payload: &mut Payload) -> Result<Self, Self::Error>;
+}
+
+impl<T: FromRequestSync> FromRequest for SyncExtractor<T> {
+    type Error = T::Error;
+    type Future = Ready<Result<Self, Self::Error>>;
+
+    fn from_request(req: &HttpRequest, payload: &mut Payload) -> Self::Future {
+        ready(T::from_request_sync(req, payload).map(|res| Self(res)))
+    }
+}

src/extractors/mod.rs

@@ -0,0 +1,2 @@
+pub mod authorized_user;
+pub mod base;

src/main.rs

@@ -1,23 +1,119 @@
-use std::fs;
-use std::path::Path;
-use schedule_parser::parse_xls;
+use crate::middlewares::authorization::JWTAuthorization;
+use crate::middlewares::content_type::ContentTypeBootstrap;
+use crate::state::{new_app_state, AppState};
+use actix_web::dev::{ServiceFactory, ServiceRequest};
+use actix_web::{App, Error, HttpServer};
+use dotenvy::dotenv;
+use log::info;
+use std::io;
+use utoipa_actix_web::scope::Scope;
+use utoipa_actix_web::AppExt;
+use utoipa_rapidoc::RapiDoc;
 
-fn main() {
-    let (teachers, groups) = parse_xls(Path::new("./schedule.xls"));
+mod state;
 
-    fs::write(
-        "./schedule.json",
-        serde_json::to_string_pretty(&groups)
-            .expect("Failed to serialize schedule")
-            .as_bytes(),
-    )
-    .expect("Failed to write schedule");
+mod extractors;
+mod middlewares;
+mod routes;
 
-    fs::write(
-        "./teachers.json",
-        serde_json::to_string_pretty(&teachers)
-            .expect("Failed to serialize teachers schedule")
-            .as_bytes(),
-    )
-    .expect("Failed to write teachers schedule");
+mod utility;
+
+mod test_env;
+
+pub fn get_api_scope<
+    I: Into<Scope<T>>,
+    T: ServiceFactory<ServiceRequest, Config = (), Error = Error, InitError = ()>,
+>(
+    scope: I,
+) -> Scope<T> {
+    let auth_scope = utoipa_actix_web::scope("/auth")
+        .service(routes::auth::sign_in)
+        .service(routes::auth::sign_in_vk)
+        .service(routes::auth::sign_up)
+        .service(routes::auth::sign_up_vk);
+
+    let users_scope = utoipa_actix_web::scope("/users")
+        .wrap(JWTAuthorization::default())
+        .service(routes::users::change_group)
+        .service(routes::users::change_username)
+        .service(routes::users::me);
+
+    let schedule_scope = utoipa_actix_web::scope("/schedule")
+        .wrap(JWTAuthorization {
+            ignore: &["/group-names", "/teacher-names"],
+        })
+        .service(routes::schedule::schedule)
+        .service(routes::schedule::cache_status)
+        .service(routes::schedule::group)
+        .service(routes::schedule::group_names)
+        .service(routes::schedule::teacher)
+        .service(routes::schedule::teacher_names);
+
+    let flow_scope = utoipa_actix_web::scope("/flow")
+        .wrap(JWTAuthorization {
+            ignore: &["/telegram-auth"],
+        })
+        .service(routes::flow::telegram_auth)
+        .service(routes::flow::telegram_complete);
+
+    let vk_id_scope = utoipa_actix_web::scope("/vkid") //
+        .service(routes::vk_id::oauth);
+
+    utoipa_actix_web::scope(scope)
+        .service(auth_scope)
+        .service(users_scope)
+        .service(schedule_scope)
+        .service(flow_scope)
+        .service(vk_id_scope)
+}
+
+async fn async_main() -> io::Result<()> {
+    info!("Запуск сервера...");
+
+    let app_state = new_app_state(None).await.unwrap();
+
+    HttpServer::new(move || {
+        let (app, api) = App::new()
+            .into_utoipa_app()
+            .app_data(app_state.clone())
+            .service(
+                get_api_scope("/api/v1")
+                    .wrap(sentry_actix::Sentry::new())
+                    .wrap(ContentTypeBootstrap),
+            )
+            .split_for_parts();
+
+        let rapidoc_service = RapiDoc::with_openapi("/api-docs-json", api).path("/api-docs");
+
+        // Because CORS error on non-localhost
+        let patched_rapidoc_html = rapidoc_service.to_html().replace(
+            "https://unpkg.com/rapidoc/dist/rapidoc-min.js",
+            "https://cdn.jsdelivr.net/npm/rapidoc/dist/rapidoc-min.min.js",
+        );
+
+        app.service(rapidoc_service.custom_html(patched_rapidoc_html))
+    })
+    .workers(4)
+    .bind(("0.0.0.0", 5050))?
+    .run()
+    .await
+}
+
+fn main() -> io::Result<()> {
+    let _guard = sentry::init((
+        "https://9c33db76e89984b3f009b28a9f4b5954@sentry.n08i40k.ru/8",
+        sentry::ClientOptions {
+            release: sentry::release_name!(),
+            send_default_pii: true,
+            ..Default::default()
+        },
+    ));
+
+    let _ = dotenv();
+
+    env_logger::init();
+
+    actix_web::rt::System::new().block_on(async { async_main().await })?;
+
+    Ok(())
 }

src/middlewares/authorization.rs

@@ -0,0 +1,110 @@
+use crate::extractors::authorized_user;
+use crate::extractors::base::FromRequestAsync;
+use actix_web::body::{BoxBody, EitherBody};
+use actix_web::dev::{forward_ready, Payload, Service, ServiceRequest, ServiceResponse, Transform};
+use actix_web::{Error, HttpRequest, ResponseError};
+use database::entity::User;
+use futures_util::future::LocalBoxFuture;
+use std::future::{ready, Ready};
+use std::rc::Rc;
+
+/// Middleware guard working with JWT tokens.
+#[derive(Default)]
+pub struct JWTAuthorization {
+    /// List of ignored endpoints.
+    pub ignore: &'static [&'static str],
+}
+
+impl<S, B> Transform<S, ServiceRequest> for JWTAuthorization
+where
+    S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error> + 'static,
+    S::Future: 'static,
+    B: 'static,
+{
+    type Response = ServiceResponse<EitherBody<B, BoxBody>>;
+    type Error = Error;
+    type Transform = JWTAuthorizationMiddleware<S>;
+    type InitError = ();
+    type Future = Ready<Result<Self::Transform, Self::InitError>>;
+
+    fn new_transform(&self, service: S) -> Self::Future {
+        ready(Ok(JWTAuthorizationMiddleware {
+            service: Rc::new(service),
+            ignore: self.ignore,
+        }))
+    }
+}
+
+pub struct JWTAuthorizationMiddleware<S> {
+    service: Rc<S>,
+    /// List of ignored endpoints.
+    ignore: &'static [&'static str],
+}
+
+impl<S, B> JWTAuthorizationMiddleware<S>
+where
+    S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error>,
+    S::Future: 'static,
+    B: 'static,
+{
+    /// Checking the validity of the token.
+    async fn check_authorization(req: &HttpRequest) -> Result<(), authorized_user::Error> {
+        let mut payload = Payload::None;
+
+        User::from_request_async(req, &mut payload)
+            .await
+            .map(|_| ())
+            .map_err(|e| e.as_error::<authorized_user::Error>().unwrap().clone())
+    }
+
+    fn should_skip(&self, req: &ServiceRequest) -> bool {
+        let path = req.match_info().unprocessed();
+
+        self.ignore.iter().any(|ignore| {
+            if !path.starts_with(ignore) {
+                return false;
+            }
+
+            if let Some(other) = path.as_bytes().get(ignore.len()) {
+                return [b'?', b'/'].contains(other);
+            }
+
+            true
+        })
+    }
+}
+
+impl<S, B> Service<ServiceRequest> for JWTAuthorizationMiddleware<S>
+where
+    S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error> + 'static,
+    S::Future: 'static,
+    B: 'static,
+{
+    type Response = ServiceResponse<EitherBody<B, BoxBody>>;
+    type Error = Error;
+    type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
+
+    forward_ready!(service);
+
+    fn call(&self, req: ServiceRequest) -> Self::Future {
+        if self.should_skip(&req) {
+            let fut = self.service.call(req);
+            return Box::pin(async move { Ok(fut.await?.map_into_left_body()) });
+        }
+
+        let service = Rc::clone(&self.service);
+
+        Box::pin(async move {
+            match Self::check_authorization(req.request()).await {
+                Ok(_) => {
+                    let fut = service.call(req).await?;
+                    Ok(fut.map_into_left_body())
+                }
+                Err(err) => Ok(ServiceResponse::new(
+                    req.into_parts().0,
+                    err.error_response().map_into_right_body(),
+                )),
+            }
+        })
+    }
+}

src/middlewares/content_type.rs

@@ -0,0 +1,65 @@
+use actix_web::body::{BoxBody, EitherBody};
+use actix_web::dev::{forward_ready, Service, ServiceRequest, ServiceResponse, Transform};
+use actix_web::http::header;
+use actix_web::http::header::HeaderValue;
+use actix_web::Error;
+use futures_util::future::LocalBoxFuture;
+use std::future::{ready, Ready};
+
+/// Middleware to specify the encoding in the Content-Type header.
+pub struct ContentTypeBootstrap;
+
+impl<S, B> Transform<S, ServiceRequest> for ContentTypeBootstrap
+where
+    S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error>,
+    S::Future: 'static,
+    B: 'static,
+{
+    type Response = ServiceResponse<EitherBody<B, BoxBody>>;
+    type Error = Error;
+    type Transform = ContentTypeMiddleware<S>;
+    type InitError = ();
+    type Future = Ready<Result<Self::Transform, Self::InitError>>;
+
+    fn new_transform(&self, service: S) -> Self::Future {
+        ready(Ok(ContentTypeMiddleware { service }))
+    }
+}
+
+pub struct ContentTypeMiddleware<S> {
+    service: S,
+}
+
+impl<S, B> Service<ServiceRequest> for ContentTypeMiddleware<S>
+where
+    S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error>,
+    S::Future: 'static,
+    B: 'static,
+{
+    type Response = ServiceResponse<EitherBody<B, BoxBody>>;
+    type Error = Error;
+    type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
+
+    forward_ready!(service);
+
+    fn call(&self, req: ServiceRequest) -> Self::Future {
+        let fut = self.service.call(req);
+
+        Box::pin(async move {
+            let mut response = fut.await?;
+
+            let headers = response.response_mut().headers_mut();
+
+            if let Some(content_type) = headers.get("Content-Type")
+                && content_type == "application/json"
+            {
+                headers.insert(
+                    header::CONTENT_TYPE,
+                    HeaderValue::from_static("application/json; charset=utf8"),
+                );
+            }
+
+            Ok(response.map_into_left_body())
+        })
+    }
+}

src/middlewares/error.rs

@@ -0,0 +1,19 @@
+use serde::{Deserialize, Serialize};
+use std::fmt::Display;
+use std::fmt::Write;
+
+/// Server response to errors within Middleware.
+#[derive(Serialize, Deserialize)]
+pub struct MiddlewareError<T: Display> {
+    code: T,
+    message: String,
+}
+
+impl<T: Display + Serialize> MiddlewareError<T> {
+    pub fn new(code: T) -> Self {
+        let mut message = String::new();
+        write!(&mut message, "{}", code).unwrap();
+
+        Self { code, message }
+    }
+}

src/middlewares/mod.rs

@@ -0,0 +1,4 @@
+pub mod error;
+
+pub mod authorization;
+pub mod content_type;

src/routes/auth/mod.rs

@@ -0,0 +1,8 @@
+mod shared;
+mod sign_in;
+mod sign_up;
+
+pub use sign_in::*;
+pub use sign_up::*;
+
+// TODO: change-password

src/routes/auth/shared.rs

@@ -0,0 +1,83 @@
+use jsonwebtoken::errors::ErrorKind;
+use jsonwebtoken::{Algorithm, DecodingKey, Validation, decode};
+use serde::{Deserialize, Serialize};
+
+#[derive(Deserialize, Serialize)]
+struct TokenData {
+    iis: String,
+    sub: i32,
+    app: i32,
+    exp: i32,
+    iat: i32,
+    jti: i32,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+struct Claims {
+    sub: i32,
+    iis: String,
+    jti: i32,
+    app: i32,
+}
+
+#[derive(Debug, PartialEq)]
+pub enum Error {
+    Jwt(ErrorKind),
+    InvalidSignature,
+    InvalidToken,
+    Expired,
+    UnknownIssuer(String),
+    UnknownType(i32),
+    UnknownClientId(i32),
+}
+
+//noinspection SpellCheckingInspection
+const VK_PUBLIC_KEY: &str = concat!(
+    "-----BEGIN PUBLIC KEY-----\n",
+    "MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAvsvJlhFX9Ju/pvCz1frB\n",
+    "DgJs592VjdwQuRAmnlJAItyHkoiDIOEocPzgcUBTbDf1plDcTyO2RCkUt0pz0WK6\n",
+    "6HNhpJyIfARjaWHeUlv4TpuHXAJJsBKklkU2gf1cjID+40sWWYjtq5dAkXnSJUVA\n",
+    "UR+sq0lJ7GmTdJtAr8hzESqGEcSP15PTs7VUdHZ1nkC2XgkuR8KmKAUb388ji1Q4\n",
+    "n02rJNOPQgd9r0ac4N2v/yTAFPXumO78N25bpcuWf5vcL9e8THk/U2zt7wf+aAWL\n",
+    "748e0pREqNluTBJNZfmhC79Xx6GHtwqHyyduiqfPmejmiujNM/rqnA4e30Tg86Yn\n",
+    "cNZ6vLJyF72Eva1wXchukH/aLispbY+EqNPxxn4zzCWaLKHG87gaCxpVv9Tm0jSD\n",
+    "2es22NjrUbtb+2pAGnXbyDp2eGUqw0RrTQFZqt/VcmmSCE45FlcZMT28otrwG1ZB\n",
+    "kZAb5Js3wLEch3ZfYL8sjhyNRPBmJBrAvzrd8qa3rdUjkC9sKyjGAaHu2MNmFl1Y\n",
+    "JFQ3J54tGpkGgJjD7Kz3w0K6OiPDlVCNQN5sqXm24fCw85Pbi8SJiaLTp/CImrs1\n",
+    "Z3nHW5q8hljA7OGmqfOP0nZS/5zW9GHPyepsI1rW6CympYLJ15WeNzePxYS5KEX9\n",
+    "EncmkSD9b45ge95hJeJZteUCAwEAAQ==\n",
+    "-----END PUBLIC KEY-----"
+);
+
+pub fn parse_vk_id(token_str: &str, client_id: i32) -> Result<i32, Error> {
+    let dkey = DecodingKey::from_rsa_pem(VK_PUBLIC_KEY.as_bytes()).unwrap();
+
+    match decode::<Claims>(token_str, &dkey, &Validation::new(Algorithm::RS256)) {
+        Ok(token_data) => {
+            let claims = token_data.claims;
+
+            if claims.iis != "VK" {
+                Err(Error::UnknownIssuer(claims.iis))
+            } else if claims.jti != 21 {
+                Err(Error::UnknownType(claims.jti))
+            } else if claims.app != client_id {
+                Err(Error::UnknownClientId(claims.app))
+            } else {
+                Ok(claims.sub)
+            }
+        }
+        Err(err) => Err(match err.into_kind() {
+            ErrorKind::InvalidToken => Error::InvalidToken,
+            ErrorKind::InvalidSignature => Error::InvalidSignature,
+            ErrorKind::InvalidAlgorithmName => Error::InvalidToken,
+            ErrorKind::MissingRequiredClaim(_) => Error::InvalidToken,
+            ErrorKind::ExpiredSignature => Error::Expired,
+            ErrorKind::InvalidAlgorithm => Error::InvalidToken,
+            ErrorKind::MissingAlgorithm => Error::InvalidToken,
+            ErrorKind::Base64(_) => Error::InvalidToken,
+            ErrorKind::Json(_) => Error::InvalidToken,
+            ErrorKind::Utf8(_) => Error::InvalidToken,
+            kind => Error::Jwt(kind),
+        }),
+    }
+}

src/routes/auth/sign_in.rs

@@ -0,0 +1,236 @@
+use self::schema::*;
+use crate::routes::auth::shared::parse_vk_id;
+use crate::routes::auth::sign_in::schema::SignInData::{Default, VkOAuth};
+use crate::routes::schema::user::UserResponse;
+use crate::routes::schema::ResponseError;
+use crate::{utility, AppState};
+use actix_web::{post, web};
+use database::query::Query;
+use web::Json;
+
+async fn sign_in_combined(
+    data: SignInData,
+    app_state: &web::Data<AppState>,
+) -> Result<UserResponse, ErrorCode> {
+    let db = app_state.get_database();
+
+    let user = match &data {
+        Default(data) => Query::find_user_by_username(db, &data.username).await,
+        VkOAuth(id) => Query::find_user_by_vk_id(db, *id).await,
+    }
+    .ok()
+    .flatten();
+
+    match user {
+        Some(user) => {
+            if let Default(data) = data {
+                if user.password.is_none() {
+                    return Err(ErrorCode::IncorrectCredentials);
+                }
+
+                match bcrypt::verify(&data.password, user.password.as_ref().unwrap()) {
+                    Ok(result) => {
+                        if !result {
+                            return Err(ErrorCode::IncorrectCredentials);
+                        }
+                    }
+                    Err(_) => {
+                        return Err(ErrorCode::IncorrectCredentials);
+                    }
+                }
+            }
+
+            let access_token = utility::jwt::encode(&user.id);
+            Ok(UserResponse::from_user_with_token(user, access_token))
+        }
+
+        None => Err(ErrorCode::IncorrectCredentials),
+    }
+}
+
+#[utoipa::path(responses(
+    (status = OK, body = UserResponse),
+    (status = NOT_ACCEPTABLE, body = ResponseError<ErrorCode>)
+))]
+#[post("/sign-in")]
+pub async fn sign_in(data: Json<Request>, app_state: web::Data<AppState>) -> ServiceResponse {
+    sign_in_combined(Default(data.into_inner()), &app_state)
+        .await
+        .into()
+}
+
+#[utoipa::path(responses(
+    (status = OK, body = UserResponse),
+    (status = NOT_ACCEPTABLE, body = ResponseError<ErrorCode>)
+))]
+#[post("/sign-in-vk")]
+pub async fn sign_in_vk(
+    data_json: Json<vk::Request>,
+    app_state: web::Data<AppState>,
+) -> ServiceResponse {
+    let data = data_json.into_inner();
+
+    match parse_vk_id(&data.access_token, app_state.get_env().vk_id.client_id) {
+        Ok(id) => sign_in_combined(VkOAuth(id), &app_state).await,
+        Err(_) => Err(ErrorCode::InvalidVkAccessToken),
+    }
+    .into()
+}
+
+mod schema {
+    use crate::routes::schema::user::UserResponse;
+    use actix_macros::ErrResponse;
+    use derive_more::Display;
+    use serde::{Deserialize, Serialize};
+    use utoipa::ToSchema;
+
+    #[derive(Deserialize, Serialize, ToSchema)]
+    #[schema(as = SignIn::Request)]
+    pub struct Request {
+        /// User name.
+        #[schema(examples("n08i40k"))]
+        pub username: String,
+
+        /// Password.
+        pub password: String,
+    }
+
+    pub mod vk {
+        use serde::{Deserialize, Serialize};
+        use utoipa::ToSchema;
+
+        #[derive(Serialize, Deserialize, ToSchema)]
+        #[serde(rename_all = "camelCase")]
+        #[schema(as = SignInVk::Request)]
+        pub struct Request {
+            /// VK ID token.
+            pub access_token: String,
+        }
+    }
+
+    pub type ServiceResponse = crate::routes::schema::Response<UserResponse, ErrorCode>;
+
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
+    #[schema(as = SignIn::ErrorCode)]
+    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+    #[status_code = "actix_web::http::StatusCode::NOT_ACCEPTABLE"]
+    pub enum ErrorCode {
+        /// Incorrect username or password.
+        #[display("Incorrect username or password.")]
+        IncorrectCredentials,
+
+        /// Invalid VK ID token.
+        #[display("Invalid VK ID token.")]
+        InvalidVkAccessToken,
+    }
+
+    /// Type of authorization.
+    pub enum SignInData {
+        /// User and password name and password.
+        Default(Request),
+
+        /// Identifier of the attached account VK.
+        VkOAuth(i32),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::schema::*;
+    use crate::routes::auth::sign_in::sign_in;
+    use crate::test_env::tests::{static_app_state, test_app_state, test_env};
+    use actix_test::test_app;
+    use actix_web::dev::ServiceResponse;
+    use actix_web::http::Method;
+    use actix_web::http::StatusCode;
+    use actix_web::test;
+    use database::entity::sea_orm_active_enums::UserRole;
+    use database::entity::ActiveUser;
+    use database::sea_orm::{ActiveModelTrait, Set};
+    use sha1::{Digest, Sha1};
+    use std::fmt::Write;
+
+    async fn sign_in_client(data: Request) -> ServiceResponse {
+        let app = test_app(test_app_state().await, sign_in).await;
+
+        let req = test::TestRequest::with_uri("/sign-in")
+            .method(Method::POST)
+            .set_json(data)
+            .to_request();
+
+        test::call_service(&app, req).await
+    }
+
+    async fn prepare(username: String) {
+        let id = {
+            let mut sha = Sha1::new();
+            sha.update(&username);
+
+            let result = sha.finalize();
+            let bytes = &result[..12];
+
+            let mut hex = String::new();
+            for byte in bytes {
+                write!(&mut hex, "{:02x}", byte).unwrap();
+            }
+
+            hex
+        };
+
+        test_env();
+
+        let app_state = static_app_state().await;
+
+        let active_user = ActiveUser {
+            id: Set(id.clone()),
+            username: Set(username),
+            password: Set(Some(
+                bcrypt::hash("example".to_string(), bcrypt::DEFAULT_COST).unwrap(),
+            )),
+            vk_id: Set(None),
+            telegram_id: Set(None),
+            group: Set(Some("ИС-214/23".to_string())),
+            role: Set(UserRole::Student),
+            android_version: Set(None),
+        };
+
+        active_user
+            .save(app_state.get_database())
+            .await
+            .expect("Failed to save user");
+    }
+
+    #[actix_web::test]
+    async fn sign_in_ok() {
+        prepare("test::sign_in_ok".to_string()).await;
+
+        let resp = sign_in_client(Request {
+            username: "test::sign_in_ok".to_string(),
+            password: "example".to_string(),
+        })
+        .await;
+
+        assert_eq!(resp.status(), StatusCode::OK);
+    }
+
+    #[actix_web::test]
+    async fn sign_in_err() {
+        prepare("test::sign_in_err".to_string()).await;
+
+        let invalid_username = sign_in_client(Request {
+            username: "test::sign_in_err::username".to_string(),
+            password: "example".to_string(),
+        })
+        .await;
+
+        assert_eq!(invalid_username.status(), StatusCode::NOT_ACCEPTABLE);
+
+        let invalid_password = sign_in_client(Request {
+            username: "test::sign_in_err".to_string(),
+            password: "bad_password".to_string(),
+        })
+        .await;
+
+        assert_eq!(invalid_password.status(), StatusCode::NOT_ACCEPTABLE);
+    }
+}

src/routes/auth/sign_up.rs

@@ -0,0 +1,373 @@
+use self::schema::*;
+use crate::routes::auth::shared::parse_vk_id;
+use crate::routes::schema::user::UserResponse;
+use crate::routes::schema::ResponseError;
+use crate::{utility, AppState};
+use actix_web::{post, web};
+use database::entity::sea_orm_active_enums::UserRole;
+use database::entity::ActiveUser;
+use database::query::Query;
+use database::sea_orm::ActiveModelTrait;
+use web::Json;
+
+async fn sign_up_combined(
+    data: SignUpData,
+    app_state: &web::Data<AppState>,
+) -> Result<UserResponse, ErrorCode> {
+    // If user selected forbidden role.
+    if data.role == UserRole::Admin {
+        return Err(ErrorCode::DisallowedRole);
+    }
+
+    if !app_state
+        .get_schedule_snapshot("eng_polytechnic")
+        .await
+        .unwrap()
+        .data
+        .groups
+        .contains_key(&data.group)
+    {
+        return Err(ErrorCode::InvalidGroupName);
+    }
+
+    let db = app_state.get_database();
+
+    // If user with specified username already exists.O
+    if Query::find_user_by_username(db, &data.username)
+        .await
+        .is_ok_and(|user| user.is_some())
+    {
+        return Err(ErrorCode::UsernameAlreadyExists);
+    }
+
+    // If user with specified VKID already exists.
+    if let Some(id) = data.vk_id
+        && Query::is_user_exists_by_vk_id(db, id)
+            .await
+            .expect("Failed to check user existence")
+    {
+        return Err(ErrorCode::VkAlreadyExists);
+    }
+
+    let active_user: ActiveUser = data.into();
+    let user = active_user.insert(db).await.unwrap();
+    let access_token = utility::jwt::encode(&user.id);
+
+    Ok(UserResponse::from_user_with_token(user, access_token))
+}
+
+#[utoipa::path(responses(
+    (status = OK, body = UserResponse),
+    (status = NOT_ACCEPTABLE, body = ResponseError<ErrorCode>)
+))]
+#[post("/sign-up")]
+pub async fn sign_up(data_json: Json<Request>, app_state: web::Data<AppState>) -> ServiceResponse {
+    let data = data_json.into_inner();
+
+    sign_up_combined(
+        SignUpData {
+            username: data.username,
+            password: Some(data.password),
+            vk_id: None,
+            group: data.group,
+            role: data.role,
+            version: data.version,
+        },
+        &app_state,
+    )
+    .await
+    .into()
+}
+
+#[utoipa::path(responses(
+    (status = OK, body = UserResponse),
+    (status = NOT_ACCEPTABLE, body = ResponseError<ErrorCode>)
+))]
+#[post("/sign-up-vk")]
+pub async fn sign_up_vk(
+    data_json: Json<vk::Request>,
+    app_state: web::Data<AppState>,
+) -> ServiceResponse {
+    let data = data_json.into_inner();
+
+    match parse_vk_id(&data.access_token, app_state.get_env().vk_id.client_id) {
+        Ok(id) => {
+            sign_up_combined(
+                SignUpData {
+                    username: data.username,
+                    password: None,
+                    vk_id: Some(id),
+                    group: data.group,
+                    role: data.role,
+                    version: data.version,
+                },
+                &app_state,
+            )
+            .await
+        }
+        Err(_) => Err(ErrorCode::InvalidVkAccessToken),
+    }
+    .into()
+}
+
+mod schema {
+    use crate::routes::schema::user::UserResponse;
+    use actix_macros::ErrResponse;
+    use database::entity::sea_orm_active_enums::UserRole;
+    use database::entity::ActiveUser;
+    use database::sea_orm::Set;
+    use derive_more::Display;
+    use objectid::ObjectId;
+    use serde::{Deserialize, Serialize};
+
+    /// WEB
+
+    #[derive(Serialize, Deserialize, utoipa::ToSchema)]
+    #[schema(as = SignUp::Request)]
+    pub struct Request {
+        /// User name.
+        #[schema(examples("n08i40k"))]
+        pub username: String,
+
+        /// Password.
+        pub password: String,
+
+        /// Group.
+        #[schema(examples("ИС-214/23"))]
+        pub group: String,
+
+        /// Role.
+        pub role: UserRole,
+
+        /// Version of the installed Polytechnic+ application.
+        #[schema(examples("3.0.0"))]
+        pub version: String,
+    }
+
+    pub mod vk {
+        use database::entity::sea_orm_active_enums::UserRole;
+        use serde::{Deserialize, Serialize};
+
+        #[derive(Serialize, Deserialize, utoipa::ToSchema)]
+        #[serde(rename_all = "camelCase")]
+        #[schema(as = SignUpVk::Request)]
+        pub struct Request {
+            /// VK ID token.
+            pub access_token: String,
+
+            /// User name.
+            #[schema(examples("n08i40k"))]
+            pub username: String,
+
+            /// Group.
+            #[schema(examples("ИС-214/23"))]
+            pub group: String,
+
+            /// Role.
+            pub role: UserRole,
+
+            /// Version of the installed Polytechnic+ application.
+            #[schema(examples("3.0.0"))]
+            pub version: String,
+        }
+    }
+
+    pub type ServiceResponse = crate::routes::schema::Response<UserResponse, ErrorCode>;
+
+    #[derive(Clone, Serialize, Display, utoipa::ToSchema, ErrResponse)]
+    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+    #[schema(as = SignUp::ErrorCode)]
+    #[status_code = "actix_web::http::StatusCode::NOT_ACCEPTABLE"]
+    pub enum ErrorCode {
+        /// Conveyed the role of Admin.
+        #[display("Conveyed the role of Admin.")]
+        DisallowedRole,
+
+        /// Unknown name of the group.
+        #[display("Unknown name of the group.")]
+        InvalidGroupName,
+
+        /// User with this name is already registered.
+        #[display("User with this name is already registered.")]
+        UsernameAlreadyExists,
+
+        /// Invalid VK ID token.
+        #[display("Invalid VK ID token.")]
+        InvalidVkAccessToken,
+
+        /// User with such an account VK is already registered.
+        #[display("User with such an account VK is already registered.")]
+        VkAlreadyExists,
+    }
+
+    /// Data for registration.
+    pub struct SignUpData {
+        // TODO: сделать ограничение на минимальную и максимальную длину при регистрации и смене.
+        /// User name.
+        pub username: String,
+
+        /// Password.
+        ///
+        /// Should be present even if registration occurs using the VK ID token.
+        pub password: Option<String>,
+
+        /// Account identifier VK.
+        pub vk_id: Option<i32>,
+
+        /// Group.
+        pub group: String,
+
+        /// Role.
+        pub role: UserRole,
+
+        /// Version of the installed Polytechnic+ application.
+        pub version: String,
+    }
+
+    impl From<SignUpData> for ActiveUser {
+        fn from(value: SignUpData) -> Self {
+            assert_ne!(value.password.is_some(), value.vk_id.is_some());
+
+            ActiveUser {
+                id: Set(ObjectId::new().unwrap().to_string()),
+                username: Set(value.username),
+                password: Set(value
+                    .password
+                    .map(|x| bcrypt::hash(x, bcrypt::DEFAULT_COST).unwrap())),
+                vk_id: Set(value.vk_id),
+                telegram_id: Set(None),
+                group: Set(Some(value.group)),
+                role: Set(value.role),
+                android_version: Set(Some(value.version)),
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::routes::auth::sign_up::schema::Request;
+    use crate::routes::auth::sign_up::sign_up;
+    use crate::test_env::tests::{static_app_state, test_app_state, test_env};
+    use actix_test::test_app;
+    use actix_web::dev::ServiceResponse;
+    use actix_web::http::Method;
+    use actix_web::http::StatusCode;
+    use actix_web::test;
+    use database::entity::sea_orm_active_enums::UserRole;
+    use database::entity::{UserColumn, UserEntity};
+    use database::sea_orm::ColumnTrait;
+    use database::sea_orm::{EntityTrait, QueryFilter};
+
+    struct SignUpPartial<'a> {
+        username: &'a str,
+        group: &'a str,
+        role: UserRole,
+    }
+
+    async fn sign_up_client(data: SignUpPartial<'_>) -> ServiceResponse {
+        let app = test_app(test_app_state().await, sign_up).await;
+
+        let req = test::TestRequest::with_uri("/sign-up")
+            .method(Method::POST)
+            .set_json(Request {
+                username: data.username.to_string(),
+                password: "example".to_string(),
+                group: data.group.to_string(),
+                role: data.role.clone(),
+                version: "1.0.0".to_string(),
+            })
+            .to_request();
+
+        test::call_service(&app, req).await
+    }
+
+    #[actix_web::test]
+    async fn sign_up_valid() {
+        // prepare
+
+        test_env();
+
+        let app_state = static_app_state().await;
+
+        UserEntity::delete_many()
+            .filter(UserColumn::Username.eq("test::sign_up_valid"))
+            .exec(app_state.get_database())
+            .await
+            .expect("Failed to delete user");
+
+        // test
+
+        let resp = sign_up_client(SignUpPartial {
+            username: "test::sign_up_valid",
+            group: "ИС-214/23",
+            role: UserRole::Student,
+        })
+        .await;
+
+        assert_eq!(resp.status(), StatusCode::OK);
+    }
+
+    #[actix_web::test]
+    async fn sign_up_multiple() {
+        // prepare
+
+        test_env();
+
+        let app_state = static_app_state().await;
+
+        UserEntity::delete_many()
+            .filter(UserColumn::Username.eq("test::sign_up_multiple"))
+            .exec(app_state.get_database())
+            .await
+            .expect("Failed to delete user");
+
+        let create = sign_up_client(SignUpPartial {
+            username: "test::sign_up_multiple",
+            group: "ИС-214/23",
+            role: UserRole::Student,
+        })
+        .await;
+
+        assert_eq!(create.status(), StatusCode::OK);
+
+        let resp = sign_up_client(SignUpPartial {
+            username: "test::sign_up_multiple",
+            group: "ИС-214/23",
+            role: UserRole::Student,
+        })
+        .await;
+
+        assert_eq!(resp.status(), StatusCode::NOT_ACCEPTABLE);
+    }
+
+    #[actix_web::test]
+    async fn sign_up_invalid_role() {
+        test_env();
+
+        // test
+        let resp = sign_up_client(SignUpPartial {
+            username: "test::sign_up_invalid_role",
+            group: "ИС-214/23",
+            role: UserRole::Admin,
+        })
+        .await;
+
+        assert_eq!(resp.status(), StatusCode::NOT_ACCEPTABLE);
+    }
+
+    #[actix_web::test]
+    async fn sign_up_invalid_group() {
+        test_env();
+
+        // test
+        let resp = sign_up_client(SignUpPartial {
+            username: "test::sign_up_invalid_group",
+            group: "invalid_group",
+            role: UserRole::Student,
+        })
+        .await;
+
+        assert_eq!(resp.status(), StatusCode::NOT_ACCEPTABLE);
+    }
+}

src/routes/flow/mod.rs

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

src/routes/flow/telegram_auth.rs

@@ -0,0 +1,173 @@
+use self::schema::*;
+use crate::routes::schema::ResponseError;
+use crate::utility::telegram::{WebAppInitDataMap, WebAppUser};
+use crate::{utility, AppState};
+use actix_web::{post, web};
+use chrono::{DateTime, Duration, Utc};
+use database::entity::sea_orm_active_enums::UserRole;
+use database::entity::ActiveUser;
+use database::query::Query;
+use database::sea_orm::{ActiveModelTrait, Set};
+use objectid::ObjectId;
+use std::sync::Arc;
+use web::Json;
+
+#[utoipa::path(responses(
+    (status = OK, body = Response),
+    (status = UNAUTHORIZED, body = ResponseError<ErrorCode>),
+))]
+#[post("/telegram-auth")]
+pub async fn telegram_auth(
+    data_json: Json<Request>,
+    app_state: web::Data<AppState>,
+) -> ServiceResponse {
+    let init_data = WebAppInitDataMap::from_str(data_json.into_inner().init_data);
+
+    {
+        let env = &app_state.get_env().telegram;
+
+        if let Err(error) = init_data.verify(env.bot_id, env.test_dc) {
+            return Err(ErrorCode::InvalidInitData(Arc::new(error))).into();
+        }
+    }
+
+    let auth_date = DateTime::<Utc>::from_timestamp(
+        init_data
+            .data_map
+            .get("auth_date")
+            .unwrap()
+            .parse()
+            .unwrap(),
+        0,
+    )
+    .unwrap();
+
+    if Utc::now() - auth_date > Duration::minutes(5) {
+        return Err(ErrorCode::ExpiredInitData).into();
+    }
+
+    let web_app_user =
+        serde_json::from_str::<WebAppUser>(init_data.data_map.get("user").unwrap()).unwrap();
+
+    let user = match Query::find_user_by_telegram_id(app_state.get_database(), web_app_user.id)
+        .await
+        .expect("Failed to find user by telegram id")
+    {
+        Some(value) => value,
+        None => {
+            let new_user = ActiveUser {
+                id: Set(ObjectId::new().unwrap().to_string()),
+                username: Set(format!("telegram_{}", web_app_user.id)), // можно оставить, а можно поменять
+                password: Set(None),                                    // ибо нехуй
+                vk_id: Set(None),
+                telegram_id: Set(Some(web_app_user.id)),
+                group: Set(None),
+                role: Set(UserRole::Student), // TODO: при реге проверять данные
+                android_version: Set(None),
+            };
+
+            new_user
+                .insert(app_state.get_database())
+                .await
+                .expect("Failed to insert user")
+        }
+    };
+
+    let access_token = utility::jwt::encode(&user.id);
+    Ok(Response::new(&access_token, user.group.is_some())).into()
+}
+
+mod schema {
+    use crate::routes::schema::PartialOkResponse;
+    use crate::state::AppState;
+    use crate::utility::telegram::VerifyError;
+    use actix_macros::ErrResponse;
+    use actix_web::body::EitherBody;
+    use actix_web::cookie::time::OffsetDateTime;
+    use actix_web::cookie::CookieBuilder;
+    use actix_web::{web, HttpRequest, HttpResponse};
+    use derive_more::Display;
+    use serde::{Deserialize, Serialize, Serializer};
+    use std::ops::Add;
+    use std::sync::Arc;
+    use utoipa::ToSchema;
+
+    #[derive(Debug, Deserialize, Serialize, ToSchema)]
+    #[serde(rename_all = "camelCase")]
+    #[schema(as = Flow::TelegramAuth::Request)]
+    pub struct Request {
+        /// Telegram WebApp init data.
+        pub init_data: String,
+    }
+
+    #[derive(Serialize, ToSchema)]
+    #[serde(rename_all = "camelCase")]
+    #[schema(as = Flow::TelegramAuth::Response)]
+    pub struct Response {
+        // #[serde(skip)]       // TODO: я пока не придумал как не отдавать сырой токен в ответе
+        // #[schema(ignore)]
+        access_token: String,
+
+        pub completed: bool,
+    }
+
+    impl Response {
+        pub fn new(access_token: &str, completed: bool) -> Self {
+            Self {
+                access_token: access_token.to_string(),
+                completed,
+            }
+        }
+    }
+
+    impl PartialOkResponse for Response {
+        fn post_process(
+            &mut self,
+            request: &HttpRequest,
+            response: &mut HttpResponse<EitherBody<String>>,
+        ) {
+            let access_token = &self.access_token;
+
+            let app_state = request.app_data::<web::Data<AppState>>().unwrap();
+            let mini_app_host = &*app_state.get_env().telegram.mini_app_host;
+
+            let cookie = CookieBuilder::new("access_token", access_token)
+                .domain(mini_app_host)
+                .path("/")
+                .expires(
+                    OffsetDateTime::now_utc().add(std::time::Duration::from_secs(60 * 60 * 24 * 7)),
+                )
+                .http_only(true)
+                .secure(true)
+                .finish();
+
+            response.add_cookie(&cookie).unwrap();
+        }
+    }
+
+    pub type ServiceResponse = crate::routes::schema::Response<Response, ErrorCode>;
+
+    #[derive(Clone, ToSchema, Display, ErrResponse)]
+    #[status_code = "actix_web::http::StatusCode::UNAUTHORIZED"]
+    #[schema(as = Flow::TelegramAuth::ErrorCode)]
+    pub enum ErrorCode {
+        #[display("Invalid init data provided: {_0}")]
+        #[schema(value_type = String)]
+        InvalidInitData(Arc<VerifyError>),
+
+        #[display("Expired init data provided.")]
+        ExpiredInitData,
+    }
+
+    impl Serialize for ErrorCode {
+        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+        where
+            S: Serializer,
+        {
+            match self {
+                ErrorCode::InvalidInitData(_) => serializer.serialize_str("INVALID_INIT_DATA"),
+                ErrorCode::ExpiredInitData => serializer.serialize_str("EXPIRED_INIT_DATA"),
+            }
+        }
+    }
+}

src/routes/flow/telegram_complete.rs

@@ -0,0 +1,104 @@
+use self::schema::*;
+use crate::extractors::base::AsyncExtractor;
+use crate::routes::schema::ResponseError;
+use crate::AppState;
+use actix_web::{post, web};
+use database::entity::User;
+use database::query::Query;
+use database::sea_orm::{ActiveModelTrait, IntoActiveModel, Set};
+use web::Json;
+
+#[utoipa::path(responses(
+    (status = OK),
+    (status = CONFLICT, body = ResponseError<ErrorCode>),
+    (status = INTERNAL_SERVER_ERROR, body = ResponseError<ErrorCode>),
+    (status = BAD_REQUEST, body = ResponseError<ErrorCode>)
+))]
+#[post("/telegram-complete")]
+pub async fn telegram_complete(
+    data: Json<Request>,
+    app_state: web::Data<AppState>,
+    user: AsyncExtractor<User>,
+) -> ServiceResponse {
+    let user = user.into_inner();
+
+    // проверка на перезапись уже имеющихся данных
+    if user.group.is_some() {
+        return Err(ErrorCode::AlreadyCompleted).into();
+    }
+
+    let data = data.into_inner();
+
+    let db = app_state.get_database();
+    let mut active_user = user.clone().into_active_model();
+
+    // замена существующего имени, если оно отличается
+    if user.username != data.username {
+        if Query::is_user_exists_by_username(db, &data.username)
+            .await
+            .unwrap()
+        {
+            return Err(ErrorCode::UsernameAlreadyExists).into();
+        }
+
+        active_user.username = Set(data.username);
+    }
+
+    // проверка на существование группы
+    if !app_state
+        .get_schedule_snapshot("eng_polytechnic")
+        .await
+        .unwrap()
+        .data
+        .groups
+        .contains_key(&data.group)
+    {
+        return Err(ErrorCode::InvalidGroupName).into();
+    }
+
+    active_user.group = Set(Some(data.group));
+
+    active_user
+        .update(db)
+        .await
+        .expect("Failed to update user");
+
+    Ok(()).into()
+}
+
+mod schema {
+    use actix_macros::ErrResponse;
+    use derive_more::Display;
+    use serde::{Deserialize, Serialize};
+    use utoipa::ToSchema;
+
+    #[derive(Debug, Deserialize, Serialize, ToSchema)]
+    #[schema(as = Flow::TelegramFill::Request)]
+    pub struct Request {
+        /// Username.
+        pub username: String,
+
+        /// Group.
+        pub group: String,
+    }
+
+    pub type ServiceResponse = crate::routes::schema::Response<(), ErrorCode>;
+
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
+    #[status_code = "actix_web::http::StatusCode::UNAUTHORIZED"]
+    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+    #[schema(as = Flow::TelegramFill::ErrorCode)]
+    pub enum ErrorCode {
+        #[display("This flow is already completed.")]
+        #[status_code = "actix_web::http::StatusCode::CONFLICT"]
+        AlreadyCompleted,
+
+        #[display("User with that name already exists.")]
+        #[status_code = "actix_web::http::StatusCode::BAD_REQUEST"]
+        UsernameAlreadyExists,
+
+        #[display("The required group does not exist.")]
+        #[status_code = "actix_web::http::StatusCode::BAD_REQUEST"]
+        InvalidGroupName,
+    }
+}

src/routes/mod.rs

@@ -0,0 +1,6 @@
+pub mod auth;
+pub mod flow;
+pub mod schedule;
+mod schema;
+pub mod users;
+pub mod vk_id;

src/routes/schedule/cache_status.rs

@@ -0,0 +1,17 @@
+use crate::routes::schedule::schema::CacheStatus;
+use crate::AppState;
+use actix_web::{get, web};
+use std::ops::Deref;
+
+#[utoipa::path(responses(
+    (status = OK, body = CacheStatus),
+))]
+#[get("/cache-status")]
+pub async fn cache_status(app_state: web::Data<AppState>) -> CacheStatus {
+    app_state
+        .get_schedule_snapshot("eng_polytechnic")
+        .await
+        .unwrap()
+        .deref()
+        .into()
+}

src/routes/schedule/get.rs

@@ -0,0 +1,9 @@
+use crate::routes::schedule::schema::ScheduleView;
+use crate::state::AppState;
+use actix_web::{get, web};
+
+#[utoipa::path(responses((status = OK, body = ScheduleView)))]
+#[get("/")]
+pub async fn schedule(app_state: web::Data<AppState>) -> ScheduleView {
+    ScheduleView::from(&app_state).await
+}

src/routes/schedule/group.rs

@@ -0,0 +1,72 @@
+use self::schema::*;
+use crate::AppState;
+use crate::extractors::base::AsyncExtractor;
+use crate::routes::schedule::schema::ScheduleEntryResponse;
+use crate::routes::schema::ResponseError;
+use actix_web::{get, web};
+use database::entity::User;
+
+#[utoipa::path(responses(
+    (status = OK, body = ScheduleEntryResponse),
+    (
+        status = SERVICE_UNAVAILABLE,
+        body = ResponseError<ErrorCode>,
+        example = json!({
+            "code": "NO_SCHEDULE",
+            "message": "Schedule not parsed yet."
+        })
+    ),
+    (
+        status = NOT_FOUND,
+        body = ResponseError<ErrorCode>,
+        example = json!({
+            "code": "NOT_FOUND",
+            "message": "Required group not found."
+        })
+    ),
+))]
+#[get("/group")]
+pub async fn group(user: AsyncExtractor<User>, app_state: web::Data<AppState>) -> ServiceResponse {
+    match &user.into_inner().group {
+        None => Err(ErrorCode::SignUpNotCompleted),
+
+        Some(group) => match app_state
+            .get_schedule_snapshot("eng_polytechnic")
+            .await
+            .unwrap()
+            .data
+            .groups
+            .get(group)
+        {
+            None => Err(ErrorCode::NotFound),
+
+            Some(entry) => Ok(entry.clone().into()),
+        },
+    }
+    .into()
+}
+
+mod schema {
+    use crate::routes::schedule::schema::ScheduleEntryResponse;
+    use actix_macros::ErrResponse;
+    use derive_more::Display;
+    use serde::Serialize;
+    use utoipa::ToSchema;
+
+    pub type ServiceResponse = crate::routes::schema::Response<ScheduleEntryResponse, ErrorCode>;
+
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
+    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+    #[schema(as = GroupSchedule::ErrorCode)]
+    pub enum ErrorCode {
+        /// The user tried to access the API without completing singing up.
+        #[status_code = "actix_web::http::StatusCode::FORBIDDEN"]
+        #[display("You have not completed signing up.")]
+        SignUpNotCompleted,
+
+        /// Group not found.
+        #[status_code = "actix_web::http::StatusCode::NOT_FOUND"]
+        #[display("Required group not found.")]
+        NotFound,
+    }
+}

src/routes/schedule/group_names.rs

@@ -0,0 +1,35 @@
+use self::schema::*;
+use crate::AppState;
+use actix_web::{get, web};
+
+#[utoipa::path(responses((status = OK, body = Response)))]
+#[get("/group-names")]
+pub async fn group_names(app_state: web::Data<AppState>) -> Response {
+    let mut names: Vec<String> = app_state
+        .get_schedule_snapshot("eng_polytechnic")
+        .await
+        .unwrap()
+        .data
+        .groups
+        .keys()
+        .cloned()
+        .collect();
+
+    names.sort();
+
+    Response { names }
+}
+
+mod schema {
+    use actix_macros::ResponderJson;
+    use serde::Serialize;
+    use utoipa::ToSchema;
+
+    #[derive(Serialize, ToSchema, ResponderJson)]
+    #[schema(as = GetGroupNames::Response)]
+    pub struct Response {
+        /// List of group names sorted in alphabetical order.
+        #[schema(examples(json!(["ИС-214/23"])))]
+        pub names: Vec<String>,
+    }
+}

src/routes/schedule/mod.rs

@@ -0,0 +1,14 @@
+mod cache_status;
+mod group;
+mod group_names;
+mod get;
+mod schema;
+mod teacher;
+mod teacher_names;
+
+pub use cache_status::*;
+pub use group::*;
+pub use group_names::*;
+pub use get::*;
+pub use teacher::*;
+pub use teacher_names::*;

src/routes/schedule/schema.rs

@@ -0,0 +1,74 @@
+use crate::state::AppState;
+use actix_macros::{OkResponse, ResponderJson};
+use actix_web::web;
+use providers::base::{ScheduleEntry, ScheduleSnapshot};
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+use std::ops::Deref;
+use utoipa::ToSchema;
+
+/// Response from schedule server.
+#[derive(Serialize, ToSchema, OkResponse, ResponderJson)]
+#[serde(rename_all = "camelCase")]
+pub struct ScheduleView {
+    /// Url to xls file.
+    url: String,
+
+    /// Groups schedule.
+    groups: HashMap<String, ScheduleEntry>,
+
+    /// Teachers schedule.
+    teachers: HashMap<String, ScheduleEntry>,
+}
+
+#[derive(Serialize, ToSchema, OkResponse)]
+pub struct ScheduleEntryResponse(ScheduleEntry);
+
+impl From<ScheduleEntry> for ScheduleEntryResponse {
+    fn from(value: ScheduleEntry) -> Self {
+        Self(value)
+    }
+}
+
+impl ScheduleView {
+    pub async fn from(app_state: &web::Data<AppState>) -> Self {
+        let schedule = app_state
+            .get_schedule_snapshot("eng_polytechnic")
+            .await
+            .unwrap()
+            .deref()
+            .clone();
+
+        Self {
+            url: schedule.url,
+            groups: schedule.data.groups,
+            teachers: schedule.data.teachers,
+        }
+    }
+}
+
+/// Cached schedule status.
+#[derive(Serialize, Deserialize, ToSchema, ResponderJson, OkResponse)]
+#[serde(rename_all = "camelCase")]
+pub struct CacheStatus {
+    /// Schedule hash.
+    pub hash: String,
+
+    /// Last cache update date.
+    pub fetched_at: i64,
+
+    /// Cached schedule update date.
+    ///
+    /// Determined by the polytechnic's server.
+    pub updated_at: i64,
+}
+
+impl From<&ScheduleSnapshot> for CacheStatus {
+    fn from(value: &ScheduleSnapshot) -> Self {
+        Self {
+            hash: value.hash(),
+            fetched_at: value.fetched_at.timestamp(),
+            updated_at: value.updated_at.timestamp(),
+        }
+    }
+}

src/routes/schedule/teacher.rs

@@ -0,0 +1,53 @@
+use self::schema::*;
+use crate::AppState;
+use crate::routes::schema::ResponseError;
+use actix_web::{get, web};
+use providers::base::ScheduleEntry;
+
+#[utoipa::path(responses(
+    (status = OK, body = ScheduleEntry),
+    (
+        status = NOT_FOUND,
+        body = ResponseError<ErrorCode>,
+        example = json!({
+            "code": "NOT_FOUND",
+            "message": "Required teacher not found."
+        })
+    ),
+))]
+#[get("/teacher/{name}")]
+pub async fn teacher(name: web::Path<String>, app_state: web::Data<AppState>) -> ServiceResponse {
+    match app_state
+        .get_schedule_snapshot("eng_polytechnic")
+        .await
+        .unwrap()
+        .data
+        .teachers
+        .get(&name.into_inner())
+    {
+        None => Err(ErrorCode::NotFound),
+
+        Some(entry) => Ok(entry.clone().into()),
+    }
+    .into()
+}
+
+mod schema {
+    use crate::routes::schedule::schema::ScheduleEntryResponse;
+    use actix_macros::ErrResponse;
+    use derive_more::Display;
+    use serde::Serialize;
+    use utoipa::ToSchema;
+
+    pub type ServiceResponse = crate::routes::schema::Response<ScheduleEntryResponse, ErrorCode>;
+
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
+    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+    #[schema(as = TeacherSchedule::ErrorCode)]
+    pub enum ErrorCode {
+        /// Teacher not found.
+        #[status_code = "actix_web::http::StatusCode::NOT_FOUND"]
+        #[display("Required teacher not found.")]
+        NotFound,
+    }
+}

src/routes/schedule/teacher_names.rs

@@ -0,0 +1,35 @@
+use self::schema::*;
+use crate::AppState;
+use actix_web::{get, web};
+
+#[utoipa::path(responses((status = OK, body = Response)))]
+#[get("/teacher-names")]
+pub async fn teacher_names(app_state: web::Data<AppState>) -> Response {
+    let mut names: Vec<String> = app_state
+        .get_schedule_snapshot("eng_polytechnic")
+        .await
+        .unwrap()
+        .data
+        .teachers
+        .keys()
+        .cloned()
+        .collect();
+
+    names.sort();
+
+    Response { names }
+}
+
+mod schema {
+    use actix_macros::ResponderJson;
+    use serde::Serialize;
+    use utoipa::ToSchema;
+
+    #[derive(Serialize, ToSchema, ResponderJson)]
+    #[schema(as = GetTeacherNames::Response)]
+    pub struct Response {
+        /// List of teacher names sorted alphabetically.
+        #[schema(examples(json!(["Хомченко Н.Е."])))]
+        pub names: Vec<String>,
+    }
+}

src/routes/schema.rs

@@ -0,0 +1,212 @@
+use actix_web::body::EitherBody;
+use actix_web::error::JsonPayloadError;
+use actix_web::http::StatusCode;
+use actix_web::{HttpRequest, HttpResponse, Responder};
+use serde::{Serialize, Serializer};
+use std::convert::Into;
+use std::fmt::Display;
+use utoipa::PartialSchema;
+
+pub struct Response<T, E>(pub Result<T, E>)
+where
+    T: Serialize + PartialSchema + PartialOkResponse,
+    E: Serialize + PartialSchema + Display + PartialErrResponse;
+
+/// Transform Response<T, E> into Result<T, E>
+impl<T, E> From<Response<T, E>> for Result<T, E>
+where
+    T: Serialize + PartialSchema + PartialOkResponse,
+    E: Serialize + PartialSchema + Display + PartialErrResponse,
+{
+    fn from(value: Response<T, E>) -> Self {
+        value.0
+    }
+}
+
+/// Transform T into Response<T, E>
+impl<T, E> From<Result<T, E>> for Response<T, E>
+where
+    T: Serialize + PartialSchema + PartialOkResponse,
+    E: Serialize + PartialSchema + Display + PartialErrResponse,
+{
+    fn from(value: Result<T, E>) -> Self {
+        Response(value)
+    }
+}
+
+/// Serialize Response<T, E>
+impl<T, E> Serialize for Response<T, E>
+where
+    T: Serialize + PartialSchema + PartialOkResponse,
+    E: Serialize + PartialSchema + Display + PartialErrResponse + Clone + Into<ResponseError<E>>,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        match &self.0 {
+            Ok(ok) => serializer.serialize_some(&ok),
+            Err(err) => serializer.serialize_some(&err.clone().into()),
+        }
+    }
+}
+
+/// Transform Response<T, E> to HttpResponse<String>
+impl<T, E> Responder for Response<T, E>
+where
+    T: Serialize + PartialSchema + PartialOkResponse,
+    E: Serialize + PartialSchema + Display + PartialErrResponse + Clone + Into<ResponseError<E>>,
+{
+    type Body = EitherBody<String>;
+
+    fn respond_to(mut self, request: &HttpRequest) -> HttpResponse<Self::Body> {
+        match serde_json::to_string(&self) {
+            Ok(body) => {
+                let code = match &self.0 {
+                    Ok(_) => StatusCode::OK,
+                    Err(e) => e.status_code(),
+                };
+
+                let mut response = match HttpResponse::build(code)
+                    .content_type(mime::APPLICATION_JSON)
+                    .message_body(body)
+                {
+                    Ok(res) => res.map_into_left_body(),
+                    Err(err) => HttpResponse::from_error(err).map_into_right_body(),
+                };
+
+                if let Ok(ok) = &mut self.0 {
+                    ok.post_process(request, &mut response);
+                }
+
+                response
+            }
+
+            Err(err) => {
+                HttpResponse::from_error(JsonPayloadError::Serialize(err)).map_into_right_body()
+            }
+        }
+    }
+}
+
+/// Трейт для всех положительных ответов от сервера
+pub trait PartialOkResponse {
+    fn post_process(
+        &mut self,
+        _request: &HttpRequest,
+        _response: &mut HttpResponse<EitherBody<String>>,
+    ) {
+    }
+}
+
+impl PartialOkResponse for () {}
+
+/// Трейт для всех отрицательных ответов от сервера
+pub trait PartialErrResponse {
+    fn status_code(&self) -> StatusCode;
+}
+
+/// ResponseError<T>
+#[derive(Serialize, utoipa::ToSchema)]
+pub struct ResponseError<T: Serialize + PartialSchema + Clone> {
+    pub code: T,
+    pub message: String,
+}
+
+impl<T> From<T> for ResponseError<T>
+where
+    T: Serialize + PartialSchema + Display + Clone,
+{
+    fn from(code: T) -> Self {
+        Self {
+            message: format!("{}", code),
+            code,
+        }
+    }
+}
+
+pub mod user {
+    use actix_macros::{OkResponse, ResponderJson};
+    use database::entity::sea_orm_active_enums::UserRole;
+    use database::entity::User;
+    use serde::Serialize;
+
+    //noinspection SpellCheckingInspection
+    /// Используется для скрытия чувствительных полей, таких как хеш пароля
+    #[derive(Serialize, utoipa::ToSchema, ResponderJson, OkResponse)]
+    #[serde(rename_all = "camelCase")]
+    pub struct UserResponse {
+        /// UUID
+        #[schema(examples("67dcc9a9507b0000772744a2"))]
+        pub id: String,
+
+        /// Имя пользователя
+        #[schema(examples("n08i40k"))]
+        pub username: String,
+
+        /// Группа
+        #[schema(examples("ИС-214/23"))]
+        pub group: Option<String>,
+
+        /// Роль
+        pub role: UserRole,
+
+        /// Идентификатор привязанного аккаунта VK
+        #[schema(examples(498094647, json!(null)))]
+        pub vk_id: Option<i32>,
+
+        /// Идентификатор привязанного аккаунта Telegram
+        #[schema(examples(996004735, json!(null)))]
+        pub telegram_id: Option<i64>,
+
+        /// JWT токен доступа
+        #[schema(examples(
+            "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6IjY3ZGNjOWE5NTA3YjAwMDA3NzI3NDRhMiIsImlhdCI6IjE3NDMxMDgwOTkiLCJleHAiOiIxODY5MjUyMDk5In0.rMgXRb3JbT9AvLK4eiY9HMB5LxgUudkpQyoWKOypZFY"
+        ))]
+        pub access_token: Option<String>,
+    }
+
+    impl UserResponse {
+        pub fn from_user_with_token(user: User, access_token: String) -> Self {
+            Self {
+                id: user.id.clone(),
+                username: user.username.clone(),
+                group: user.group.clone(),
+                role: user.role.clone(),
+                vk_id: user.vk_id,
+                telegram_id: user.telegram_id,
+                access_token: Some(access_token),
+            }
+        }
+    }
+
+    /// Create UserResponse from User ref.
+    impl From<&User> for UserResponse {
+        fn from(user: &User) -> Self {
+            Self {
+                id: user.id.clone(),
+                username: user.username.clone(),
+                group: user.group.clone(),
+                role: user.role.clone(),
+                vk_id: user.vk_id,
+                telegram_id: user.telegram_id,
+                access_token: None,
+            }
+        }
+    }
+
+    /// Transform User to UserResponse.
+    impl From<User> for UserResponse {
+        fn from(user: User) -> Self {
+            Self {
+                id: user.id,
+                username: user.username,
+                group: user.group,
+                role: user.role,
+                vk_id: user.vk_id,
+                telegram_id: user.telegram_id,
+                access_token: None,
+            }
+        }
+    }
+}

src/routes/users/change_group.rs

@@ -0,0 +1,69 @@
+use self::schema::*;
+use crate::extractors::base::AsyncExtractor;
+use crate::state::AppState;
+use actix_web::{post, web};
+use database::entity::User;
+use database::sea_orm::{ActiveModelTrait, IntoActiveModel, Set};
+
+#[utoipa::path(responses((status = OK)))]
+#[post("/change-group")]
+pub async fn change_group(
+    app_state: web::Data<AppState>,
+    user: AsyncExtractor<User>,
+    data: web::Json<Request>,
+) -> ServiceResponse {
+    let user = user.into_inner();
+
+    if user
+        .group
+        .as_ref()
+        .is_some_and(|group| group.eq(&data.group))
+    {
+        return Ok(()).into();
+    }
+
+    if !app_state
+        .get_schedule_snapshot("eng_polytechnic")
+        .await
+        .unwrap()
+        .data
+        .groups
+        .contains_key(&data.group)
+    {
+        return Err(ErrorCode::NotFound).into();
+    }
+
+    let mut active_user = user.clone().into_active_model();
+    active_user.group = Set(Some(data.into_inner().group));
+
+    active_user.update(app_state.get_database()).await.unwrap();
+
+    Ok(()).into()
+}
+
+mod schema {
+    use actix_macros::ErrResponse;
+    use derive_more::Display;
+    use serde::{Deserialize, Serialize};
+    use utoipa::ToSchema;
+
+    pub type ServiceResponse = crate::routes::schema::Response<(), ErrorCode>;
+
+    #[derive(Deserialize, ToSchema)]
+    #[schema(as = ChangeGroup::Request)]
+    pub struct Request {
+        // Group.
+        pub group: String,
+    }
+
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
+    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+    #[schema(as = ChangeGroup::ErrorCode)]
+    #[status_code = "actix_web::http::StatusCode::CONFLICT"]
+    pub enum ErrorCode {
+        /// The required group does not exist.
+        #[display("The required group does not exist.")]
+        #[status_code = "actix_web::http::StatusCode::NOT_FOUND"]
+        NotFound,
+    }
+}

src/routes/users/change_username.rs

@@ -0,0 +1,62 @@
+use self::schema::*;
+use crate::extractors::base::AsyncExtractor;
+use crate::state::AppState;
+use actix_web::{post, web};
+use database::entity::User;
+use database::query::Query;
+use database::sea_orm::{ActiveModelTrait, IntoActiveModel, Set};
+
+#[utoipa::path(responses((status = OK)))]
+#[post("/change-username")]
+pub async fn change_username(
+    app_state: web::Data<AppState>,
+    user: AsyncExtractor<User>,
+    data: web::Json<Request>,
+) -> ServiceResponse {
+    let user = user.into_inner();
+
+    if user.username == data.username {
+        return Ok(()).into();
+    }
+
+    let db = app_state.get_database();
+
+    if Query::is_user_exists_by_username(db, &data.username)
+        .await
+        .unwrap()
+    {
+        return Err(ErrorCode::AlreadyExists).into();
+    }
+
+    let mut active_user = user.into_active_model();
+    active_user.username = Set(data.into_inner().username);
+    active_user.update(db).await.unwrap();
+
+    Ok(()).into()
+}
+
+mod schema {
+    use actix_macros::ErrResponse;
+    use derive_more::Display;
+    use serde::{Deserialize, Serialize};
+    use utoipa::ToSchema;
+
+    pub type ServiceResponse = crate::routes::schema::Response<(), ErrorCode>;
+
+    #[derive(Serialize, Deserialize, ToSchema)]
+    #[schema(as = ChangeUsername::Request)]
+    pub struct Request {
+        /// User name.
+        pub username: String,
+    }
+
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
+    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+    #[schema(as = ChangeUsername::ErrorCode)]
+    #[status_code = "actix_web::http::StatusCode::CONFLICT"]
+    pub enum ErrorCode {
+        /// A user with this name already exists.
+        #[display("A user with this name already exists.")]
+        AlreadyExists,
+    }
+}

src/routes/users/me.rs

@@ -0,0 +1,10 @@
+use crate::extractors::base::AsyncExtractor;
+use crate::routes::schema::user::UserResponse;
+use actix_web::get;
+use database::entity::User;
+
+#[utoipa::path(responses((status = OK, body = UserResponse)))]
+#[get("/me")]
+pub async fn me(user: AsyncExtractor<User>) -> UserResponse {
+    user.into_inner().into()
+}

src/routes/users/mod.rs

@@ -0,0 +1,7 @@
+mod change_group;
+mod change_username;
+mod me;
+
+pub use change_group::*;
+pub use change_username::*;
+pub use me::*;

src/routes/vk_id/mod.rs

@@ -0,0 +1,3 @@
+mod oauth;
+
+pub use oauth::*;

src/routes/vk_id/oauth.rs

@@ -0,0 +1,117 @@
+use self::schema::*;
+use crate::routes::schema::ResponseError;
+use crate::state::AppState;
+use actix_web::{post, web};
+use serde::Deserialize;
+use std::collections::HashMap;
+use uuid::Uuid;
+
+#[allow(dead_code)]
+#[derive(Deserialize)]
+struct VkIdAuthResponse {
+    refresh_token: String,
+    access_token: String,
+    id_token: String,
+    token_type: String,
+    expires_in: i32,
+    user_id: i32,
+    state: String,
+    scope: String,
+}
+
+#[utoipa::path(responses(
+    (status = OK, body = Response),
+    (
+        status = NOT_ACCEPTABLE,
+        body = ResponseError<ErrorCode>,
+        example = json!({
+            "code": "VK_ID_ERROR",
+            "message": "VK server returned an error"
+        })
+    ),
+))]
+#[post("/oauth")]
+async fn oauth(data: web::Json<Request>, app_state: web::Data<AppState>) -> ServiceResponse {
+    let data = data.into_inner();
+    let state = Uuid::new_v4().simple().to_string();
+
+    let vk_id = &app_state.get_env().vk_id;
+    let client_id = vk_id.client_id.clone().to_string();
+
+    let mut params = HashMap::new();
+    params.insert("grant_type", "authorization_code");
+    params.insert("client_id", client_id.as_str());
+    params.insert("state", state.as_str());
+    params.insert("code_verifier", data.code_verifier.as_str());
+    params.insert("code", data.code.as_str());
+    params.insert("device_id", data.device_id.as_str());
+    params.insert("redirect_uri", vk_id.redirect_url.as_str());
+
+    let client = reqwest::Client::new();
+    match client
+        .post("https://id.vk.com/oauth2/auth")
+        .form(&params)
+        .send()
+        .await
+    {
+        Ok(res) => {
+            if !res.status().is_success() {
+                return Err(ErrorCode::VkIdError).into();
+            }
+
+            match res.json::<VkIdAuthResponse>().await {
+                Ok(auth_data) => Ok(Response {
+                    access_token: auth_data.id_token,
+                }),
+                Err(error) => {
+                    sentry::capture_error(&error);
+
+                    Err(ErrorCode::VkIdError)
+                }
+            }
+        }
+        Err(_) => Err(ErrorCode::VkIdError),
+    }
+    .into()
+}
+
+mod schema {
+    use actix_macros::{ErrResponse, OkResponse};
+    use derive_more::Display;
+    use serde::{Deserialize, Serialize};
+    use utoipa::ToSchema;
+
+    pub type ServiceResponse = crate::routes::schema::Response<Response, ErrorCode>;
+
+    #[derive(Deserialize, ToSchema)]
+    #[serde(rename_all = "camelCase")]
+    #[schema(as = VkIdOAuth::Request)]
+    pub struct Request {
+        /// Код подтверждения authorization_code.
+        pub code: String,
+
+        /// Parameter to protect transmitted data.
+        pub code_verifier: String,
+
+        /// Device ID.
+        pub device_id: String,
+    }
+
+    #[derive(Serialize, ToSchema, OkResponse)]
+    #[serde(rename_all = "camelCase")]
+    #[schema(as = VkIdOAuth::Response)]
+    pub struct Response {
+        /// ID token.
+        pub access_token: String,
+    }
+
+    #[derive(Clone, Serialize, Display, ToSchema, ErrResponse)]
+    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+    #[schema(as = VkIdOAuth::ErrorCode)]
+    #[status_code = "actix_web::http::StatusCode::NOT_ACCEPTABLE"]
+    pub enum ErrorCode {
+        /// VK server returned an error.
+        #[display("VK server returned an error")]
+        VkIdError,
+    }
+}

src/state/env/mod.rs

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

src/state/env/schedule.rs

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

src/state/env/telegram.rs

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

src/state/env/vk_id.rs

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

src/state/env/yandex_cloud.rs

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

src/state/mod.rs

@@ -0,0 +1,100 @@
+mod env;
+
+pub use crate::state::env::AppEnv;
+use actix_web::web;
+use database::sea_orm::{Database, DatabaseConnection};
+use providers::base::{ScheduleProvider, ScheduleSnapshot};
+use std::collections::HashMap;
+use std::sync::Arc;
+use tokio_util::sync::CancellationToken;
+
+/// Common data provided to endpoints.
+pub struct AppState {
+    cancel_token: CancellationToken,
+    database: DatabaseConnection,
+    providers: HashMap<String, Arc<dyn ScheduleProvider>>,
+    env: AppEnv,
+}
+
+impl AppState {
+    pub async fn new(
+        database: Option<DatabaseConnection>,
+    ) -> Result<Self, Box<dyn std::error::Error>> {
+        let env = AppEnv::default();
+        let providers: HashMap<String, Arc<dyn ScheduleProvider>> = HashMap::from([(
+            "eng_polytechnic".to_string(),
+            providers::EngelsPolytechnicProvider::get({
+                #[cfg(test)]
+                {
+                    providers::EngelsPolytechnicUpdateSource::Prepared(ScheduleSnapshot {
+                        url: "".to_string(),
+                        fetched_at: chrono::DateTime::default(),
+                        updated_at: chrono::DateTime::default(),
+                        data: providers::test_utils::engels_polytechnic::test_result().unwrap(),
+                    })
+                }
+
+                #[cfg(not(test))]
+                {
+                    if let Some(url) = &env.schedule.url {
+                        providers::EngelsPolytechnicUpdateSource::Url(url.clone())
+                    } else {
+                        providers::EngelsPolytechnicUpdateSource::GrabFromSite {
+                            yandex_api_key: env.yandex_cloud.api_key.clone(),
+                            yandex_func_id: env.yandex_cloud.func_id.clone(),
+                        }
+                    }
+                }
+            })
+            .await?,
+        )]);
+
+        let this = Self {
+            cancel_token: CancellationToken::new(),
+            database: if let Some(database) = database {
+                database
+            } else {
+                let database_url = std::env::var("DATABASE_URL").expect("DATABASE_URL must be set");
+                Database::connect(&database_url)
+                    .await
+                    .unwrap_or_else(|_| panic!("Error connecting to {}", database_url))
+            },
+            env,
+            providers,
+        };
+
+        if this.env.schedule.auto_update {
+            for provider in this.providers.values() {
+                let provider = provider.clone();
+                let cancel_token = this.cancel_token.clone();
+
+                tokio::spawn(async move { provider.start_auto_update_task(cancel_token).await });
+            }
+        }
+
+        Ok(this)
+    }
+
+    pub async fn get_schedule_snapshot(&'_ self, provider: &str) -> Option<Arc<ScheduleSnapshot>> {
+        if let Some(provider) = self.providers.get(provider) {
+            return Some(provider.get_schedule().await);
+        }
+
+        None
+    }
+
+    pub fn get_database(&'_ self) -> &DatabaseConnection {
+        &self.database
+    }
+
+    pub fn get_env(&self) -> &AppEnv {
+        &self.env
+    }
+}
+
+/// Create a new object web::Data<AppState>.
+pub async fn new_app_state(
+    database: Option<DatabaseConnection>,
+) -> Result<web::Data<AppState>, Box<dyn std::error::Error>> {
+    Ok(web::Data::new(AppState::new(database).await?))
+}

src/test_env.rs

@@ -0,0 +1,37 @@
+#[cfg(test)]
+pub(crate) mod tests {
+    use crate::state::{new_app_state, AppState};
+    use actix_web::web;
+    use log::info;
+    use tokio::sync::OnceCell;
+
+    pub fn test_env() {
+        info!("Loading test environment file...");
+
+        dotenvy::from_filename(".env.test.local")
+            .or_else(|_| dotenvy::from_filename(".env.test"))
+            .expect("Failed to load test environment file");
+    }
+
+    pub async fn test_app_state() -> web::Data<AppState> {
+        let state = new_app_state(Some(static_app_state().await.get_database().clone()))
+            .await
+            .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(async || -> web::Data<AppState> {
+                #[cfg(feature = "trace")]
+                console_subscriber::init();
+
+                new_app_state(None).await.unwrap()
+            })
+            .await
+            .clone()
+    }
+}

src/utility/jwt.rs

@@ -0,0 +1,169 @@
+use chrono::Duration;
+use chrono::Utc;
+use jsonwebtoken::errors::ErrorKind;
+use jsonwebtoken::{Algorithm, DecodingKey, EncodingKey, Header, Validation, decode};
+use serde::{Deserialize, Serialize};
+use serde_with::DisplayFromStr;
+use serde_with::serde_as;
+use std::env;
+use std::mem::discriminant;
+use std::sync::LazyLock;
+
+/// Key for token verification.
+static DECODING_KEY: LazyLock<DecodingKey> = LazyLock::new(|| {
+    let secret = env::var("JWT_SECRET").expect("JWT_SECRET must be set");
+
+    DecodingKey::from_secret(secret.as_bytes())
+});
+
+/// Key for creating a signed token.
+static ENCODING_KEY: LazyLock<EncodingKey> = LazyLock::new(|| {
+    let secret = env::var("JWT_SECRET").expect("JWT_SECRET must be set");
+
+    EncodingKey::from_secret(secret.as_bytes())
+});
+
+/// Token verification errors.
+#[allow(dead_code)]
+#[derive(Debug)]
+pub enum Error {
+    /// The token has a different signature.
+    InvalidSignature,
+
+    /// Token reading error.
+    InvalidToken(ErrorKind),
+
+    /// Token expired.
+    Expired,
+}
+
+impl PartialEq for Error {
+    fn eq(&self, other: &Self) -> bool {
+        discriminant(self) == discriminant(other)
+    }
+}
+
+/// The data the token holds.
+#[serde_as]
+#[derive(Debug, Serialize, Deserialize)]
+struct Claims {
+    /// User account UUID.
+    id: String,
+
+    /// Token creation date.
+    #[serde_as(as = "DisplayFromStr")]
+    iat: u64,
+
+    /// Token expiry date.
+    #[serde_as(as = "DisplayFromStr")]
+    exp: u64,
+}
+
+/// Token signing algorithm.
+pub(crate) const DEFAULT_ALGORITHM: Algorithm = Algorithm::HS256;
+
+/// Checking the token and extracting the UUID of the user account from it.
+pub fn verify_and_decode(token: &str) -> Result<String, Error> {
+    let mut validation = Validation::new(DEFAULT_ALGORITHM);
+
+    validation.required_spec_claims.remove("exp");
+    validation.validate_exp = false;
+
+    let result = decode::<Claims>(token, &DECODING_KEY, &validation);
+
+    match result {
+        Ok(token_data) => {
+            if token_data.claims.exp < Utc::now().timestamp().unsigned_abs() {
+                Err(Error::Expired)
+            } else {
+                Ok(token_data.claims.id)
+            }
+        }
+        Err(err) => Err(match err.into_kind() {
+            ErrorKind::InvalidSignature => Error::InvalidSignature,
+            ErrorKind::ExpiredSignature => Error::Expired,
+            kind => Error::InvalidToken(kind),
+        }),
+    }
+}
+
+/// Creating a user token.
+pub fn encode(id: &str) -> String {
+    let header = Header {
+        typ: Some(String::from("JWT")),
+        ..Default::default()
+    };
+
+    let iat = Utc::now();
+    let exp = iat + Duration::days(365 * 4);
+
+    let claims = Claims {
+        id: id.to_string(),
+        iat: iat.timestamp().unsigned_abs(),
+        exp: exp.timestamp().unsigned_abs(),
+    };
+
+    jsonwebtoken::encode(&header, &claims, &ENCODING_KEY).unwrap()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::test_env::tests::test_env;
+
+    #[test]
+    fn test_encode() {
+        test_env();
+
+        assert_eq!(encode(&"test".to_string()).is_empty(), false);
+    }
+
+    #[test]
+    fn test_decode_invalid_token() {
+        test_env();
+
+        let token = "".to_string();
+        let result = verify_and_decode(&token);
+
+        assert!(result.is_err());
+        assert_eq!(
+            result.err().unwrap(),
+            Error::InvalidToken(ErrorKind::InvalidToken)
+        );
+    }
+
+    //noinspection SpellCheckingInspection
+    #[test]
+    fn test_decode_invalid_signature() {
+        test_env();
+
+        let token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOiIxNjE2NTI2Mzc2IiwiaWF0IjoiMTQ5MDM4MjM3NiIsImlkIjoiNjdkY2M5YTk1MDdiMDAwMDc3Mjc0NGEyIn0.Qc2LbMJTvl2hWzDM2XyQv4m9lIqR84COAESQAieUxz8".to_string();
+        let result = verify_and_decode(&token);
+
+        assert!(result.is_err());
+        assert_eq!(result.err().unwrap(), Error::InvalidSignature);
+    }
+
+    //noinspection SpellCheckingInspection
+    #[test]
+    fn test_decode_expired() {
+        test_env();
+
+        let token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjY3ZGNjOWE5NTA3YjAwMDA3NzI3NDRhMiIsImlhdCI6IjAiLCJleHAiOiIwIn0.GBsVYvnZIfHXt00t-qmAdUMyHSyWOBtC0Mrxwg1HQOM".to_string();
+        let result = verify_and_decode(&token);
+
+        assert!(result.is_err());
+        assert_eq!(result.err().unwrap(), Error::Expired);
+    }
+
+    //noinspection SpellCheckingInspection
+    #[test]
+    fn test_decode_ok() {
+        test_env();
+
+        let token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjY3ZGNjOWE5NTA3YjAwMDA3NzI3NDRhMiIsImlhdCI6Ijk5OTk5OTk5OTkiLCJleHAiOiI5OTk5OTk5OTk5In0.o1vN-ze5iaJrnlHqe7WARXMBhhzjxTjTKkjlmTGEnOI".to_string();
+        let result = verify_and_decode(&token);
+
+        assert!(result.is_ok());
+    }
+}

src/utility/mod.rs

@@ -0,0 +1,2 @@
+pub mod jwt;
+pub mod telegram;

src/utility/telegram.rs

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