diff --git a/Cargo.lock b/Cargo.lock
index c50be0f..f2dd7bb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -50,7 +50,7 @@ dependencies = [
  "percent-encoding",
  "pin-project-lite",
  "rand 0.9.0",
- "sha1",
+ "sha1 0.10.6",
  "smallvec",
  "tokio",
  "tokio-util",
@@ -2351,7 +2351,7 @@ dependencies = [
 
 [[package]]
 name = "schedule-parser-rusted"
-version = "0.7.0"
+version = "0.8.0"
 dependencies = [
  "actix-macros 0.1.0",
  "actix-test",
@@ -2367,6 +2367,7 @@ dependencies = [
  "env_logger",
  "futures-util",
  "fuzzy-matcher",
+ "hex",
  "jsonwebtoken",
  "mime",
  "objectid",
@@ -2377,7 +2378,7 @@ dependencies = [
  "serde_json",
  "serde_repr",
  "serde_with",
- "sha2",
+ "sha1 0.11.0-pre.5",
  "tokio",
  "utoipa",
  "utoipa-actix-web",
@@ -2510,10 +2511,10 @@ dependencies = [
 ]
 
 [[package]]
-name = "sha2"
+name = "sha1"
 version = "0.11.0-pre.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19b4241d1a56954dce82cecda5c8e9c794eef6f53abe5e5216bac0a0ea71ffa7"
+checksum = "55f44e40722caefdd99383c25d3ae52a1094a1951215ae76f68837ece4e7f566"
 dependencies = [
  "cfg-if",
  "cpufeatures",
diff --git a/Cargo.toml b/Cargo.toml
index 050feae..8cf27b1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ members = ["actix-macros", "actix-test"]
 
 [package]
 name = "schedule-parser-rusted"
-version = "0.7.0"
+version = "0.8.0"
 edition = "2024"
 publish = false
 
@@ -21,6 +21,7 @@ env_logger = "0.11.7"
 futures-util = "0.3.31"
 fuzzy-matcher = "0.3.7"
 jsonwebtoken = { version = "9.3.1", features = ["use_pem"] }
+hex = "0.4.3"
 mime = "0.3.17"
 objectid = "0.2.0"
 regex = "1.11.1"
@@ -29,7 +30,7 @@ serde = { version = "1.0.219", features = ["derive"] }
 serde_json = "1.0.140"
 serde_with = "3.12.0"
 serde_repr = "0.1.20"
-sha2 = "0.11.0-pre.5"
+sha1 = "0.11.0-pre.5"
 tokio = { version = "1.44.1", features = ["macros", "rt-multi-thread"] }
 rand = "0.9.0"
 utoipa = { version = "5", features = ["actix_extras", "chrono"] }
diff --git a/actix-macros/src/lib.rs b/actix-macros/src/lib.rs
index c581038..2ca131c 100644
--- a/actix-macros/src/lib.rs
+++ b/actix-macros/src/lib.rs
@@ -121,16 +121,9 @@ mod responder_json {
                 type Body = ::actix_web::body::EitherBody<::actix_web::body::BoxBody>;
 
                 fn respond_to(self, _: &::actix_web::HttpRequest) -> ::actix_web::HttpResponse<Self::Body> {
-                    match ::serde_json::to_string(&self) {
-                        Ok(body) => ::actix_web::HttpResponse::Ok()
-                            .json(body)
-                            .map_into_left_body(),
-
-                        Err(err) => ::actix_web::HttpResponse::from_error(
-                            ::actix_web::error::JsonPayloadError::Serialize(err),
-                        )
-                        .map_into_right_body(),
-                    }
+                    ::actix_web::HttpResponse::Ok()
+                            .json(self)
+                            .map_into_left_body()
                 }
             }
         })
diff --git a/benches/parse.rs b/benches/parse.rs
index fefb411..91d5f8f 100644
--- a/benches/parse.rs
+++ b/benches/parse.rs
@@ -5,7 +5,7 @@ use schedule_parser_rusted::parser::parse_xls;
 pub fn bench_parse_xls(c: &mut Criterion) {
     let buffer: Vec<u8> = include_bytes!("../schedule.xls").to_vec();
 
-    c.bench_function("parse_xls", |b| b.iter(|| parse_xls(&buffer)));
+    c.bench_function("parse_xls", |b| b.iter(|| parse_xls(&buffer).unwrap()));
 }
 
 criterion_group!(benches, bench_parse_xls);
diff --git a/src/app_state.rs b/src/app_state.rs
index 77a49d5..1a6e398 100644
--- a/src/app_state.rs
+++ b/src/app_state.rs
@@ -1,19 +1,37 @@
 use crate::parser::schema::ParseResult;
+use crate::utility::hasher::DigestHasher;
 use crate::xls_downloader::basic_impl::BasicXlsDownloader;
 use actix_web::web;
 use chrono::{DateTime, Utc};
 use diesel::{Connection, PgConnection};
+use sha1::{Digest, Sha1};
 use std::env;
+use std::hash::Hash;
 use std::sync::{Mutex, MutexGuard};
 
 #[derive(Clone)]
 pub struct Schedule {
     pub etag: String,
+    pub fetched_at: DateTime<Utc>,
     pub updated_at: DateTime<Utc>,
     pub parsed_at: DateTime<Utc>,
     pub data: ParseResult,
 }
 
+impl Schedule {
+    pub fn hash(&self) -> String {
+        let mut hasher = DigestHasher::from(Sha1::new());
+
+        self.etag.hash(&mut hasher);
+
+        self.data.teachers.iter().for_each(|e| e.hash(&mut hasher));
+        self.data.groups.iter().for_each(|e| e.hash(&mut hasher));
+
+        hasher.finalize()
+    }
+}
+
+/// Общие данные передаваемые в эндпоинты
 pub struct AppState {
     pub downloader: Mutex<BasicXlsDownloader>,
     pub schedule: Mutex<Option<Schedule>>,
@@ -21,11 +39,13 @@ pub struct AppState {
 }
 
 impl AppState {
+    /// Получение объекта соединения с базой данных PostgreSQL
     pub fn connection(&self) -> MutexGuard<PgConnection> {
         self.database.lock().unwrap()
     }
 }
 
+/// Создание нового объекта web::Data<AppState>
 pub fn app_state() -> web::Data<AppState> {
     let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
 
diff --git a/src/database/driver.rs b/src/database/driver.rs
index df2aa29..0aa1dba 100644
--- a/src/database/driver.rs
+++ b/src/database/driver.rs
@@ -30,7 +30,7 @@ pub mod users {
             .select(User::as_select())
             .first(con)
     }
-    
+
     pub fn get_by_vk_id(
         connection: &Mutex<PgConnection>,
         _vk_id: i32,
@@ -72,6 +72,14 @@ pub mod users {
         }
     }
 
+    pub fn insert(connection: &Mutex<PgConnection>, user: &User) -> QueryResult<usize> {
+        let mut lock = connection.lock().unwrap();
+        let con = lock.deref_mut();
+
+        insert_into(users).values(user).execute(con)
+    }
+
+    #[cfg(test)]
     pub fn delete_by_username(connection: &Mutex<PgConnection>, _username: &String) -> bool {
         let mut lock = connection.lock().unwrap();
         let con = lock.deref_mut();
@@ -81,14 +89,8 @@ pub mod users {
             Err(_) => false,
         }
     }
-
-    pub fn insert(connection: &Mutex<PgConnection>, user: &User) -> QueryResult<usize> {
-        let mut lock = connection.lock().unwrap();
-        let con = lock.deref_mut();
-
-        insert_into(users).values(user).execute(con)
-    }
-
+    
+    #[cfg(test)]
     pub fn insert_or_ignore(connection: &Mutex<PgConnection>, user: &User) -> QueryResult<usize> {
         let mut lock = connection.lock().unwrap();
         let con = lock.deref_mut();
diff --git a/src/database/models.rs b/src/database/models.rs
index 2771f22..8b33c96 100644
--- a/src/database/models.rs
+++ b/src/database/models.rs
@@ -35,12 +35,27 @@ pub enum UserRole {
 #[diesel(table_name = crate::database::schema::users)]
 #[diesel(treat_none_as_null = true)]
 pub struct User {
+    /// UUID аккаунта
     pub id: String,
+
+    /// Имя пользователя
     pub username: String,
+
+    /// BCrypt хеш пароля
     pub password: String,
+
+    /// Идентификатор привязанного аккаунта VK
     pub vk_id: Option<i32>,
+
+    /// JWT токен доступа
     pub access_token: String,
+
+    /// Группа
     pub group: String,
+
+    /// Роль
     pub role: UserRole,
+
+    /// Версия установленного приложения Polytechnic+
     pub version: String,
 }
diff --git a/src/extractors/authorized_user.rs b/src/extractors/authorized_user.rs
index 3e4733a..befa422 100644
--- a/src/extractors/authorized_user.rs
+++ b/src/extractors/authorized_user.rs
@@ -6,25 +6,29 @@ use crate::utility::jwt;
 use actix_macros::ResponseErrorMessage;
 use actix_web::body::BoxBody;
 use actix_web::dev::Payload;
+use actix_web::http::header;
 use actix_web::{HttpRequest, web};
 use derive_more::Display;
 use serde::{Deserialize, Serialize};
 use std::fmt::Debug;
-use actix_web::http::header;
 
 #[derive(Clone, Debug, Serialize, Deserialize, Display, ResponseErrorMessage)]
 #[status_code = "actix_web::http::StatusCode::UNAUTHORIZED"]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum Error {
+    /// В запросе отсутствует заголовок Authorization
     #[display("No Authorization header found")]
     NoHeader,
 
+    /// Неизвестный тип авторизации, отличающийся от Bearer
     #[display("Bearer token is required")]
     UnknownAuthorizationType,
 
+    /// Токен не действителен
     #[display("Invalid or expired access token")]
     InvalidAccessToken,
 
+    /// Пользователь привязанный к токену не найден в базе данных
     #[display("No user associated with access token")]
     NoUser,
 }
@@ -35,6 +39,7 @@ impl Error {
     }
 }
 
+/// Экстрактор пользователя из запроса с токеном
 impl FromRequestSync for User {
     type Error = actix_web::Error;
 
diff --git a/src/extractors/base.rs b/src/extractors/base.rs
index d6f9597..608c22a 100644
--- a/src/extractors/base.rs
+++ b/src/extractors/base.rs
@@ -3,20 +3,25 @@ use actix_web::{FromRequest, HttpRequest};
 use futures_util::future::LocalBoxFuture;
 use std::future::{Ready, ready};
 
-pub trait FromRequestAsync: Sized {
-    type Error: Into<actix_web::Error>;
-
-    async fn from_request_async(req: HttpRequest, payload: Payload) -> Result<Self, Self::Error>;
-}
-
+/// Асинхронный экстрактор объектов из запроса
 pub struct AsyncExtractor<T>(T);
 
 impl<T> AsyncExtractor<T> {
+    #[allow(dead_code)]
+    /// Получение объекта, извлечённого с помощью экстрактора
     pub fn into_inner(self) -> T {
         self.0
     }
 }
 
+pub trait FromRequestAsync: Sized {
+    type Error: Into<actix_web::Error>;
+
+    /// Асинхронная функция для извлечения данных из запроса
+    async fn from_request_async(req: HttpRequest, payload: Payload) -> Result<Self, Self::Error>;
+}
+
+/// Реализация треита FromRequest для всех асинхронных экстракторов
 impl<T: FromRequestAsync> FromRequest for AsyncExtractor<T> {
     type Error = T::Error;
     type Future = LocalBoxFuture<'static, Result<Self, Self::Error>>;
@@ -32,20 +37,24 @@ impl<T: FromRequestAsync> FromRequest for AsyncExtractor<T> {
     }
 }
 
-pub trait FromRequestSync: Sized {
-    type Error: Into<actix_web::Error>;
-
-    fn from_request_sync(req: &HttpRequest, payload: &mut Payload) -> Result<Self, Self::Error>;
-}
-
+/// Синхронный экстрактор объектов из запроса
 pub struct SyncExtractor<T>(T);
 
 impl<T> SyncExtractor<T> {
+    /// Получение объекта, извлечённого с помощью экстрактора
     pub fn into_inner(self) -> T {
         self.0
     }
 }
 
+pub trait FromRequestSync: Sized {
+    type Error: Into<actix_web::Error>;
+
+    /// Синхронная функция для извлечения данных из запроса
+    fn from_request_sync(req: &HttpRequest, payload: &mut Payload) -> Result<Self, Self::Error>;
+}
+
+/// Реализация треита FromRequest для всех синхронных экстракторов
 impl<T: FromRequestSync> FromRequest for SyncExtractor<T> {
     type Error = T::Error;
     type Future = Ready<Result<Self, Self::Error>>;
diff --git a/src/main.rs b/src/main.rs
index 13cf9c6..4c3fd7d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,13 +1,19 @@
-use crate::app_state::{app_state, AppState};
-use crate::middlewares::authorization::Authorization;
+use crate::app_state::{AppState, app_state};
+use crate::middlewares::authorization::JWTAuthorization;
 use crate::routes::auth::sign_in::{sign_in_default, sign_in_vk};
 use crate::routes::auth::sign_up::{sign_up_default, sign_up_vk};
+use crate::routes::schedule::get_cache_status::get_cache_status;
+use crate::routes::schedule::get_group::get_group;
+use crate::routes::schedule::get_group_names::get_group_names;
+use crate::routes::schedule::get_schedule::get_schedule;
+use crate::routes::schedule::get_teacher::get_teacher;
+use crate::routes::schedule::get_teacher_names::get_teacher_names;
+use crate::routes::schedule::update_download_url::update_download_url;
 use crate::routes::users::me::me;
 use actix_web::{App, HttpServer};
 use dotenvy::dotenv;
 use utoipa_actix_web::AppExt;
 use utoipa_rapidoc::RapiDoc;
-use crate::routes::schedule::get_schedule::get_schedule;
 
 mod app_state;
 
@@ -31,6 +37,8 @@ async fn main() {
     unsafe { std::env::set_var("RUST_LOG", "debug") };
     env_logger::init();
 
+    let app_state = app_state();
+
     HttpServer::new(move || {
         let auth_scope = utoipa_actix_web::scope("/auth")
             .service(sign_in_default)
@@ -39,12 +47,18 @@ async fn main() {
             .service(sign_up_vk);
 
         let users_scope = utoipa_actix_web::scope("/users")
-            .wrap(Authorization)
+            .wrap(JWTAuthorization)
             .service(me);
-        
+
         let schedule_scope = utoipa_actix_web::scope("/schedule")
-            .wrap(Authorization)
-            .service(get_schedule);
+            .wrap(JWTAuthorization)
+            .service(get_schedule)
+            .service(update_download_url)
+            .service(get_cache_status)
+            .service(get_group)
+            .service(get_group_names)
+            .service(get_teacher)
+            .service(get_teacher_names);
 
         let api_scope = utoipa_actix_web::scope("/api/v1")
             .service(auth_scope)
@@ -53,7 +67,7 @@ async fn main() {
 
         let (app, api) = App::new()
             .into_utoipa_app()
-            .app_data(app_state())
+            .app_data(app_state.clone())
             .service(api_scope)
             .split_for_parts();
 
@@ -67,6 +81,7 @@ async fn main() {
 
         app.service(rapidoc_service.custom_html(patched_rapidoc_html))
     })
+    .workers(4)
     .bind(("0.0.0.0", 8080))
     .unwrap()
     .run()
diff --git a/src/middlewares/authorization.rs b/src/middlewares/authorization.rs
index ca85abe..6f5b32b 100644
--- a/src/middlewares/authorization.rs
+++ b/src/middlewares/authorization.rs
@@ -7,9 +7,10 @@ use actix_web::{Error, HttpRequest, ResponseError};
 use futures_util::future::LocalBoxFuture;
 use std::future::{Ready, ready};
 
-pub struct Authorization;
+/// Middleware guard работающий с токенами JWT
+pub struct JWTAuthorization;
 
-impl<S, B> Transform<S, ServiceRequest> for Authorization
+impl<S, B> Transform<S, ServiceRequest> for JWTAuthorization
 where
     S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error>,
     S::Future: 'static,
@@ -17,20 +18,21 @@ where
 {
     type Response = ServiceResponse<EitherBody<B, BoxBody>>;
     type Error = Error;
-    type Transform = AuthorizationMiddleware<S>;
+    type Transform = JWTAuthorizationMiddleware<S>;
     type InitError = ();
     type Future = Ready<Result<Self::Transform, Self::InitError>>;
 
     fn new_transform(&self, service: S) -> Self::Future {
-        ready(Ok(AuthorizationMiddleware { service }))
+        ready(Ok(JWTAuthorizationMiddleware { service }))
     }
 }
 
-pub struct AuthorizationMiddleware<S> {
+pub struct JWTAuthorizationMiddleware<S> {
     service: S,
 }
 
-impl<S, B> AuthorizationMiddleware<S>
+/// Функция для проверки наличия и действительности токена в запросе, а так же существования пользователя к которому он привязан
+impl<S, B> JWTAuthorizationMiddleware<S>
 where
     S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error>,
     S::Future: 'static,
@@ -47,7 +49,7 @@ where
     }
 }
 
-impl<S, B> Service<ServiceRequest> for AuthorizationMiddleware<S>
+impl<S, B> Service<ServiceRequest> for JWTAuthorizationMiddleware<S>
 where
     S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error>,
     S::Future: 'static,
diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index cc3a31c..19773b3 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -1,7 +1,7 @@
 use crate::parser::LessonParseResult::{Lessons, Street};
 use crate::parser::schema::LessonType::Break;
 use crate::parser::schema::{
-    Day, Lesson, LessonSubGroup, LessonTime, LessonType, ParseResult, ScheduleEntry,
+    Day, Lesson, LessonSubGroup, LessonTime, LessonType, ParseError, ParseResult, ScheduleEntry,
 };
 use calamine::{Reader, Xls, open_workbook_from_rs};
 use chrono::{Duration, NaiveDateTime};
@@ -14,15 +14,12 @@ use std::sync::LazyLock;
 
 pub mod schema;
 
+/// Данные ячейке хранящей строку
 struct InternalId {
-    /**
-     * Индекс строки
-     */
+    /// Индекс строки
     row: u32,
 
-    /**
-     * Индекс столбца
-     */
+    /// Индекс столбца
     column: u32,
 
     /**
@@ -31,30 +28,25 @@ struct InternalId {
     name: String,
 }
 
+/// Данные о времени проведения пар из второй колонки расписания
 struct InternalTime {
-    /**
-     * Временной отрезок проведения пары
-     */
+    /// Временной отрезок проведения пары
     time_range: LessonTime,
 
-    /**
-     * Тип пары
-     */
+    /// Тип пары
     lesson_type: LessonType,
 
-    /**
-     * Индекс пары
-     */
+    /// Индекс пары
     default_index: Option<u32>,
 
-    /**
-     * Рамка ячейки
-     */
+    /// Рамка ячейки
     xls_range: ((u32, u32), (u32, u32)),
 }
 
+/// Сокращение типа рабочего листа
 type WorkSheet = calamine::Range<calamine::Data>;
 
+/// Получение строки из требуемой ячейки
 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()
@@ -82,6 +74,7 @@ fn get_string_from_cell(worksheet: &WorkSheet, row: u32, col: u32) -> Option<Str
     }
 }
 
+/// Получение границ ячейки по её верхней левой координате
 fn get_merge_from_start(worksheet: &WorkSheet, row: u32, column: u32) -> ((u32, u32), (u32, u32)) {
     let worksheet_end = worksheet.end().unwrap();
 
@@ -116,7 +109,8 @@ fn get_merge_from_start(worksheet: &WorkSheet, row: u32, column: u32) -> ((u32,
     ((row, column), (row_end, column_end))
 }
 
-fn parse_skeleton(worksheet: &WorkSheet) -> (Vec<InternalId>, Vec<InternalId>) {
+/// Получение "скелета" расписания из рабочего листа
+fn parse_skeleton(worksheet: &WorkSheet) -> Result<(Vec<InternalId>, Vec<InternalId>), ParseError> {
     let range = &worksheet;
 
     let mut is_parsed = false;
@@ -124,8 +118,8 @@ fn parse_skeleton(worksheet: &WorkSheet) -> (Vec<InternalId>, Vec<InternalId>) {
     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 start = range.start().ok_or(ParseError::UnknownWorkSheetRange)?;
+    let end = range.end().ok_or(ParseError::UnknownWorkSheetRange)?;
 
     let mut row = start.0;
     while row < end.0 {
@@ -170,15 +164,22 @@ fn parse_skeleton(worksheet: &WorkSheet) -> (Vec<InternalId>, Vec<InternalId>) {
         }
     }
 
-    (days, groups)
+    Ok((days, groups))
 }
 
+/// Результат получения пары из ячейки
 enum LessonParseResult {
+    /// Список пар длинной от одного до двух
+    ///
+    /// Количество пар будет равно одному, если пара первая за день, иначе будет возвращен список из шаблона перемены и самой пары
     Lessons(Vec<Lesson>),
+    
+    /// Улица на которой находится корпус политехникума
     Street(String),
 }
 
 trait StringInnerSlice {
+    /// Получения отрезка строки из строки по начальному и конечному индексу
     fn inner_slice(&self, from: usize, to: usize) -> Self;
 }
 
@@ -191,6 +192,7 @@ impl StringInnerSlice for String {
     }
 }
 
+/// Получение нестандартного типа пары по названию
 fn guess_lesson_type(name: &String) -> Option<(String, LessonType)> {
     let map: HashMap<String, LessonType> = HashMap::from([
         ("(консультация)".to_string(), LessonType::Consultation),
@@ -232,19 +234,20 @@ fn guess_lesson_type(name: &String) -> Option<(String, LessonType)> {
     }
 }
 
+/// Получение пары или улицы из ячейки
 fn parse_lesson(
     worksheet: &WorkSheet,
     day: &mut Day,
     day_times: &Vec<InternalTime>,
     time: &InternalTime,
     column: u32,
-) -> LessonParseResult {
+) -> Result<LessonParseResult, ParseError> {
     let row = time.xls_range.0.0;
 
     let (name, lesson_type) = {
         let raw_name_opt = get_string_from_cell(&worksheet, row, column);
         if raw_name_opt.is_none() {
-            return Lessons(Vec::new());
+            return Ok(Lessons(Vec::new()));
         }
 
         let raw_name = raw_name_opt.unwrap();
@@ -253,7 +256,7 @@ fn parse_lesson(
             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);
+            return Ok(Street(raw_name));
         }
 
         if let Some(guess) = guess_lesson_type(&raw_name) {
@@ -263,7 +266,7 @@ fn parse_lesson(
         }
     };
 
-    let (default_range, lesson_time): (Option<[u8; 2]>, LessonTime) = {
+    let (default_range, lesson_time) = || -> Result<(Option<[u8; 2]>, LessonTime), ParseError> {
         // check if multi-lesson
         let cell_range = get_merge_from_start(worksheet, row, column);
 
@@ -272,7 +275,7 @@ fn parse_lesson(
             .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 end_time = end_time_arr.first().ok_or(ParseError::LessonTimeNotFound)?;
 
         let range: Option<[u8; 2]> = if time.default_index != None {
             let default = time.default_index.unwrap() as u8;
@@ -286,10 +289,10 @@ fn parse_lesson(
             end: end_time.time_range.end,
         };
 
-        (range, time)
-    };
+        Ok((range, time))
+    }()?;
 
-    let (name, mut subgroups) = parse_name_and_subgroups(&name);
+    let (name, mut subgroups) = parse_name_and_subgroups(&name)?;
 
     {
         let cabinets: Vec<String> = parse_cabinets(worksheet, row, column + 1);
@@ -345,12 +348,12 @@ fn parse_lesson(
     };
 
     let prev_lesson = if day.lessons.len() == 0 {
-        return Lessons(Vec::from([lesson]));
+        return Ok(Lessons(Vec::from([lesson])));
     } else {
         &day.lessons[day.lessons.len() - 1]
     };
 
-    Lessons(Vec::from([
+    Ok(Lessons(Vec::from([
         Lesson {
             lesson_type: Break,
             default_range: None,
@@ -363,9 +366,10 @@ fn parse_lesson(
             group: None,
         },
         lesson,
-    ]))
+    ])))
 }
 
+/// Получение списка кабинетов справа от ячейки пары
 fn parse_cabinets(worksheet: &WorkSheet, row: u32, column: u32) -> Vec<String> {
     let mut cabinets: Vec<String> = Vec::new();
 
@@ -383,15 +387,16 @@ fn parse_cabinets(worksheet: &WorkSheet, row: u32, column: u32) -> Vec<String> {
     cabinets
 }
 
-fn parse_name_and_subgroups(name: &String) -> (String, Vec<LessonSubGroup>) {
+/// Получение "чистого" названия пары и списка преподавателей из текста ячейки пары
+fn parse_name_and_subgroups(name: &String) -> Result<(String, Vec<LessonSubGroup>), ParseError> {
     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+$").unwrap());
+    static END_CLEAN_RE: LazyLock<Regex, fn() -> Regex> =
+        LazyLock::new(|| Regex::new(r"[.\s]+$").unwrap());
 
     let (teachers, lesson_name) = {
         let clean_name = CLEAN_RE.replace_all(&name, "").to_string();
@@ -402,11 +407,13 @@ fn parse_name_and_subgroups(name: &String) -> (String, Vec<LessonSubGroup>) {
             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(),
+                END_CLEAN_RE.replace(&capture_str, "").to_string(),
+                END_CLEAN_RE
+                    .replace(&name[0..name.find(&*capture_name).unwrap()], "")
+                    .to_string(),
             )
         } else {
-            return (NAME_CLEAN_RE.replace(&name, "").to_string(), Vec::new());
+            return Ok((END_CLEAN_RE.replace(&name, "").to_string(), Vec::new()));
         }
     };
 
@@ -421,7 +428,7 @@ fn parse_name_and_subgroups(name: &String) -> (String, Vec<LessonSubGroup>) {
                     .as_str()
                     .to_string()
                     .parse::<u8>()
-                    .expect("Unable to read subgroup index!")
+                    .map_err(|_| ParseError::SubgroupIndexParsingFailed)?
             } else {
                 0
             },
@@ -432,7 +439,7 @@ fn parse_name_and_subgroups(name: &String) -> (String, Vec<LessonSubGroup>) {
                 captures.get(2).unwrap().as_str().to_string(),
                 captures.get(3).unwrap().as_str().to_string()
             ),
-        })
+        });
     }
 
     // фикс, если у кого-то отсутствует индекс подгруппы
@@ -469,9 +476,10 @@ fn parse_name_and_subgroups(name: &String) -> (String, Vec<LessonSubGroup>) {
         subgroups.reverse()
     }
 
-    (lesson_name, subgroups)
+    Ok((lesson_name, subgroups))
 }
 
+/// Конвертация списка пар групп в список пар преподавателей
 fn convert_groups_to_teachers(
     groups: &HashMap<String, ScheduleEntry>,
 ) -> HashMap<String, ScheduleEntry> {
@@ -537,21 +545,31 @@ fn convert_groups_to_teachers(
         }
     }
 
+    teachers.iter_mut().for_each(|(_, teacher)| {
+        teacher.days.iter_mut().for_each(|day| {
+            day.lessons.sort_by(|a, b| {
+                a.default_range.as_ref().unwrap()[1].cmp(&b.default_range.as_ref().unwrap()[1])
+            })
+        })
+    });
+
     teachers
 }
 
-pub fn parse_xls(buffer: &Vec<u8>) -> ParseResult {
+/// Чтение XLS документа из буфера и преобразование его в готовые к использованию расписания
+pub fn parse_xls(buffer: &Vec<u8>) -> Result<ParseResult, ParseError> {
     let cursor = Cursor::new(&buffer);
-    let mut workbook: Xls<_> = open_workbook_from_rs(cursor).expect("Can't open workbook");
+    let mut workbook: Xls<_> =
+        open_workbook_from_rs(cursor).map_err(|e| ParseError::BadXLS(std::sync::Arc::new(e)))?;
 
     let worksheet: WorkSheet = workbook
         .worksheets()
         .first()
-        .expect("No worksheet found")
+        .ok_or(ParseError::NoWorkSheets)?
         .1
         .to_owned();
 
-    let (days_markup, groups_markup) = parse_skeleton(&worksheet);
+    let (days_markup, groups_markup) = parse_skeleton(&worksheet)?;
 
     let mut groups: HashMap<String, ScheduleEntry> = HashMap::new();
     let mut days_times: Vec<Vec<InternalTime>> = Vec::new();
@@ -631,9 +649,7 @@ pub fn parse_xls(buffer: &Vec<u8>) -> ParseResult {
                         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 parse_res = TIME_RE.captures(&time).ok_or(ParseError::GlobalTime)?;
 
                         let start_match = parse_res.get(1).unwrap().as_str();
                         let start_parts: Vec<&str> = start_match.split(".").collect();
@@ -671,7 +687,7 @@ pub fn parse_xls(buffer: &Vec<u8>) -> ParseResult {
                     &day_times,
                     &time,
                     group_markup.column,
-                ) {
+                )? {
                     Lessons(l) => day.lessons.append(l),
                     Street(s) => day.street = Some(s.to_owned()),
                 }
@@ -683,27 +699,27 @@ pub fn parse_xls(buffer: &Vec<u8>) -> ParseResult {
         groups.insert(group.name.clone(), group);
     }
 
-    ParseResult {
+    Ok(ParseResult {
         teachers: convert_groups_to_teachers(&groups),
         groups,
-    }
+    })
 }
 
 #[cfg(test)]
 pub mod tests {
     use super::*;
 
-    pub fn test_result() -> ParseResult {
-        let buffer: Vec<u8> = include_bytes!("../../schedule.xls").to_vec();
-
-        parse_xls(&buffer)
+    pub fn test_result() -> Result<ParseResult, ParseError> {
+        parse_xls(&include_bytes!("../../schedule.xls").to_vec())
     }
 
     #[test]
     fn read() {
         let result = test_result();
 
-        assert_ne!(result.groups.len(), 0);
-        assert_ne!(result.teachers.len(), 0);
+        assert!(result.is_ok());
+
+        assert_ne!(result.as_ref().unwrap().groups.len(), 0);
+        assert_ne!(result.as_ref().unwrap().teachers.len(), 0);
     }
 }
diff --git a/src/parser/schema.rs b/src/parser/schema.rs
index 09aae4a..b25c8da 100644
--- a/src/parser/schema.rs
+++ b/src/parser/schema.rs
@@ -1,129 +1,162 @@
 use chrono::{DateTime, Utc};
-use serde::{Deserialize, Serialize};
+use derive_more::Display;
+use serde::{Deserialize, Serialize, Serializer};
 use serde_repr::{Deserialize_repr, Serialize_repr};
 use std::collections::HashMap;
+use std::sync::Arc;
+use utoipa::ToSchema;
 
-#[derive(Serialize, Deserialize, Debug, Clone, utoipa::ToSchema)]
+#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
 pub struct LessonTime {
+    /// Начало пары
     pub start: DateTime<Utc>,
+
+    /// Конец пары
     pub end: DateTime<Utc>,
 }
 
-#[derive(Serialize_repr, Deserialize_repr, Debug, PartialEq, Clone, utoipa::ToSchema)]
+#[derive(Clone, Hash, PartialEq, Debug, Serialize_repr, Deserialize_repr, ToSchema)]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 #[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
+    /// Обычная
+    Default = 0,
+
+    /// Допы
+    Additional,
+
+    /// Перемена
+    Break,
+
+    /// Консультация
+    Consultation,
+
+    /// Самостоятельная работа
+    IndependentWork,
+
+    /// Зачёт
+    Exam,
+
+    /// Зачет с оценкой
+    ExamWithGrade,
+
+    /// Экзамен
+    ExamDefault,
 }
 
-#[derive( Serialize, Deserialize, Debug, Clone, utoipa::ToSchema)]
+#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
 pub struct LessonSubGroup {
-    /**
-     * Номер подгруппы.
-     */
+    /// Номер подгруппы
     pub number: u8,
 
-    /**
-     * Кабинет, если присутствует.
-     */
+    /// Кабинет, если присутствует
     pub cabinet: Option<String>,
 
-    /**
-     * Фио преподавателя.
-     */
+    /// Фио преподавателя
     pub teacher: String,
 }
 
-#[derive(Serialize, Deserialize, Debug, Clone, utoipa::ToSchema)]
+#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
 #[serde(rename_all = "camelCase")]
 pub struct Lesson {
-    /**
-     * Тип занятия.
-     */
+    /// Тип занятия
     #[serde(rename = "type")]
     pub lesson_type: LessonType,
 
-    /**
-     * Индексы пар, если присутствуют.
-     */
+    /// Индексы пар, если присутствуют
     pub default_range: Option<[u8; 2]>,
 
-    /**
-     * Название занятия.
-     */
+    /// Название занятия
     pub name: Option<String>,
 
-    /**
-     * Начало и конец занятия.
-     */
+    /// Начало и конец занятия
     pub time: LessonTime,
 
-    /**
-     * Подгруппы.
-     */
+    /// Список подгрупп
     #[serde(rename = "subGroups")]
     pub subgroups: Option<Vec<LessonSubGroup>>,
 
-    /**
-     * Группа, если это расписание для преподавателей.
-     */
+    /// Группа, если это расписание для преподавателей
     pub group: Option<String>,
 }
 
-#[derive(Serialize, Deserialize, Debug, Clone, utoipa::ToSchema)]
+#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
 pub struct Day {
-    /**
-     * День недели.
-     */
+    /// День недели
     pub name: String,
 
-    /**
-     * Адрес другого корпуса.
-     */
+    /// Адрес другого корпуса
     pub street: Option<String>,
 
-    /**
-     * Дата.
-     */
+    /// Дата
     pub date: DateTime<Utc>,
 
-    /**
-     * Список пар в этот день.
-     */
+    /// Список пар в этот день
     pub lessons: Vec<Lesson>,
 }
 
-#[derive(Clone, Serialize, Deserialize, Debug, utoipa::ToSchema)]
+#[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
 pub struct ScheduleEntry {
-    /**
-     * Название группы или ФИО преподавателя.
-     */
+    /// Название группы или ФИО преподавателя
     pub name: String,
 
-    /**
-     * Список из шести дней.
-     */
+    /// Список из шести дней
     pub days: Vec<Day>,
 }
 
 #[derive(Clone)]
 pub struct ParseResult {
-    /**
-     * Список групп.
-     * Ключом является название группы.
-     */
+    /// Список групп
     pub groups: HashMap<String, ScheduleEntry>,
 
-    /**
-     * Список преподавателей.
-     * Ключом является ФИО преподавателя.
-     */
+    /// Список преподавателей
     pub teachers: HashMap<String, ScheduleEntry>,
 }
+
+#[derive(Debug, Display, Clone, ToSchema)]
+pub enum ParseError {
+    /// Ошибки связанные с чтением XLS файла.
+    #[display("{}: Failed to read XLS file.", "_0")]
+    #[schema(value_type = String)]
+    BadXLS(Arc<calamine::XlsError>),
+
+    /// Не найдено ни одного листа
+    #[display("No work sheets found.")]
+    NoWorkSheets,
+
+    /// Отсутствуют данные об границах листа
+    #[display("There is no data on work sheet boundaries.")]
+    UnknownWorkSheetRange,
+
+    /// Не удалось прочитать начало и конец пары из строки
+    #[display("Failed to read lesson start and end times from string.")]
+    GlobalTime,
+
+    /// Не найдены начало и конец соответствующее паре
+    #[display("No start and end times matching the lesson was found.")]
+    LessonTimeNotFound,
+
+    /// Не удалось прочитать индекс подгруппы
+    #[display("Failed to read subgroup index.")]
+    SubgroupIndexParsingFailed,
+}
+
+impl Serialize for ParseError {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        match self {
+            ParseError::BadXLS(_) => serializer.serialize_str("BAD_XLS"),
+            ParseError::NoWorkSheets => serializer.serialize_str("NO_WORK_SHEETS"),
+            ParseError::UnknownWorkSheetRange => {
+                serializer.serialize_str("UNKNOWN_WORK_SHEET_RANGE")
+            }
+            ParseError::GlobalTime => serializer.serialize_str("GLOBAL_TIME"),
+            ParseError::LessonTimeNotFound => serializer.serialize_str("LESSON_TIME_NOT_FOUND"),
+            ParseError::SubgroupIndexParsingFailed => {
+                serializer.serialize_str("SUBGROUP_INDEX_PARSING_FAILED")
+            }
+        }
+    }
+}
diff --git a/src/routes/auth/sign_in.rs b/src/routes/auth/sign_in.rs
index 6d698b6..c1cb88d 100644
--- a/src/routes/auth/sign_in.rs
+++ b/src/routes/auth/sign_in.rs
@@ -5,7 +5,7 @@ use crate::routes::auth::shared::parse_vk_id;
 use crate::routes::auth::sign_in::schema::SignInData::{Default, Vk};
 use crate::routes::schema::user::UserResponse;
 use crate::routes::schema::{IntoResponseAsError, ResponseError};
-use crate::{AppState, utility};
+use crate::{utility, AppState};
 use actix_web::{post, web};
 use diesel::SaveChangesDsl;
 use std::ops::DerefMut;
@@ -55,7 +55,7 @@ async fn sign_in(
     (status = NOT_ACCEPTABLE, body = ResponseError<ErrorCode>)
 ))]
 #[post("/sign-in")]
-pub async fn sign_in_default(data: Json<Request>, app_state: web::Data<AppState>) -> Response {
+pub async fn sign_in_default(data: Json<Request>, app_state: web::Data<AppState>) -> ServiceResponse {
     sign_in(Default(data.into_inner()), &app_state).await.into()
 }
 
@@ -64,7 +64,7 @@ pub async fn sign_in_default(data: Json<Request>, app_state: web::Data<AppState>
     (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>) -> Response {
+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) {
@@ -74,51 +74,57 @@ pub async fn sign_in_vk(data_json: Json<vk::Request>, app_state: web::Data<AppSt
 }
 
 mod schema {
-    use crate::routes::schema::PartialStatusCode;
     use crate::routes::schema::user::UserResponse;
-    use actix_macros::IntoResponseError;
-    use actix_web::http::StatusCode;
+    use actix_macros::{IntoResponseError, StatusCode};
     use serde::{Deserialize, Serialize};
+    use utoipa::ToSchema;
 
-    #[derive(Deserialize, Serialize, utoipa::ToSchema)]
+    #[derive(Deserialize, Serialize, ToSchema)]
     #[schema(as = SignIn::Request)]
     pub struct Request {
+        /// Имя пользователя
         #[schema(examples("n08i40k"))]
         pub username: String,
+        
+        /// Пароль
         pub password: String,
     }
 
     pub mod vk {
         use serde::{Deserialize, Serialize};
+        use utoipa::ToSchema;
 
-        #[derive(Serialize, Deserialize, utoipa::ToSchema)]
+        #[derive(Serialize, Deserialize, ToSchema)]
         #[serde(rename_all = "camelCase")]
         #[schema(as = SignInVk::Request)]
         pub struct Request {
+            /// Токен VK ID
             pub access_token: String,
         }
     }
 
-    pub type Response = crate::routes::schema::Response<UserResponse, ErrorCode>;
+    pub type ServiceResponse = crate::routes::schema::Response<UserResponse, ErrorCode>;
 
-    #[derive(Serialize, utoipa::ToSchema, Clone, IntoResponseError)]
+    #[derive(Serialize, ToSchema, Clone, IntoResponseError, StatusCode)]
     #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
     #[schema(as = SignIn::ErrorCode)]
+    #[status_code = "actix_web::http::StatusCode::NOT_ACCEPTABLE"]
     pub enum ErrorCode {
+        /// Некорректное имя пользователя или пароль
         IncorrectCredentials,
+        
+        /// Недействительный токен VK ID
         InvalidVkAccessToken,
     }
 
-    impl PartialStatusCode for ErrorCode {
-        fn status_code(&self) -> StatusCode {
-            StatusCode::NOT_ACCEPTABLE
-        }
-    }
-
     /// Internal
 
+    /// Тип авторизации
     pub enum SignInData {
+        /// Имя пользователя и пароль
         Default(Request),
+        
+        /// Идентификатор привязанного аккаунта VK 
         Vk(i32),
     }
 }
@@ -136,7 +142,7 @@ mod tests {
     use actix_web::http::Method;
     use actix_web::http::StatusCode;
     use actix_web::test;
-    use sha2::{Digest, Sha256};
+    use sha1::{Digest, Sha1};
     use std::fmt::Write;
 
     async fn sign_in_client(data: Request) -> ServiceResponse {
@@ -152,7 +158,7 @@ mod tests {
 
     fn prepare(username: String) {
         let id = {
-            let mut sha = Sha256::new();
+            let mut sha = Sha1::new();
             sha.update(&username);
 
             let result = sha.finalize();
diff --git a/src/routes/auth/sign_up.rs b/src/routes/auth/sign_up.rs
index db53dc8..fb7c038 100644
--- a/src/routes/auth/sign_up.rs
+++ b/src/routes/auth/sign_up.rs
@@ -50,7 +50,10 @@ async fn sign_up(
     (status = NOT_ACCEPTABLE, body = ResponseError<ErrorCode>)
 ))]
 #[post("/sign-up")]
-pub async fn sign_up_default(data_json: Json<Request>, app_state: web::Data<AppState>) -> Response {
+pub async fn sign_up_default(
+    data_json: Json<Request>,
+    app_state: web::Data<AppState>,
+) -> ServiceResponse {
     let data = data_json.into_inner();
 
     sign_up(
@@ -73,7 +76,10 @@ pub async fn sign_up_default(data_json: Json<Request>, app_state: web::Data<AppS
     (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>) -> Response {
+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) {
@@ -107,11 +113,9 @@ pub async fn sign_up_vk(data_json: Json<vk::Request>, app_state: web::Data<AppSt
 
 mod schema {
     use crate::database::models::{User, UserRole};
-    use crate::routes::schema::PartialStatusCode;
     use crate::routes::schema::user::UserResponse;
     use crate::utility;
     use actix_macros::{IntoResponseError, StatusCode};
-    use actix_web::http::StatusCode;
     use objectid::ObjectId;
     use serde::{Deserialize, Serialize};
 
@@ -120,16 +124,21 @@ mod schema {
     #[derive(Serialize, Deserialize, utoipa::ToSchema)]
     #[schema(as = SignUp::Request)]
     pub struct Request {
+        /// Имя пользователя
         #[schema(examples("n08i40k"))]
         pub username: String,
 
+        /// Пароль
         pub password: String,
 
+        /// Группа
         #[schema(examples("ИС-214/23"))]
         pub group: String,
 
+        /// Роль
         pub role: UserRole,
 
+        /// Версия установленного приложения Polytechnic+
         #[schema(examples("3.0.0"))]
         pub version: String,
     }
@@ -142,43 +151,71 @@ mod schema {
         #[serde(rename_all = "camelCase")]
         #[schema(as = SignUpVk::Request)]
         pub struct Request {
+            /// Токен VK ID
             pub access_token: String,
 
+            /// Имя пользователя
             #[schema(examples("n08i40k"))]
             pub username: String,
 
+            /// Группа
             #[schema(examples("ИС-214/23"))]
             pub group: String,
 
+            /// Роль
             pub role: UserRole,
 
+            /// Версия установленного приложения Polytechnic+
             #[schema(examples("3.0.0"))]
             pub version: String,
         }
     }
 
-    pub type Response = crate::routes::schema::Response<UserResponse, ErrorCode>;
+    pub type ServiceResponse = crate::routes::schema::Response<UserResponse, ErrorCode>;
 
     #[derive(Clone, Serialize, utoipa::ToSchema, IntoResponseError, StatusCode)]
-    #[status_code = "StatusCode::NOT_ACCEPTABLE"]
     #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
     #[schema(as = SignUp::ErrorCode)]
+    #[status_code = "actix_web::http::StatusCode::NOT_ACCEPTABLE"]
     pub enum ErrorCode {
+        /// Передана роль ADMIN
         DisallowedRole,
+
+        /// Неизвестное название группы
         InvalidGroupName,
+
+        /// Пользователь с таким именем уже зарегистрирован
         UsernameAlreadyExists,
+
+        /// Недействительный токен VK ID
         InvalidVkAccessToken,
+
+        /// Пользователь с таким аккаунтом VK уже зарегистрирован
         VkAlreadyExists,
     }
 
     /// Internal
 
+    /// Данные для регистрации
     pub struct SignUpData {
+        /// Имя пользователя
         pub username: String,
+
+        /// Пароль
+        ///
+        /// Должен присутствовать даже если регистрация происходит с помощью токена VK ID
         pub password: String,
+
+        /// Идентификатор аккаунта VK
         pub vk_id: Option<i32>,
+
+        /// Группа
         pub group: String,
+
+        /// Роль
         pub role: UserRole,
+
+        /// Версия установленного приложения Polytechnic+
         pub version: String,
     }
 
diff --git a/src/routes/schedule/get_cache_status.rs b/src/routes/schedule/get_cache_status.rs
new file mode 100644
index 0000000..fe9906e
--- /dev/null
+++ b/src/routes/schedule/get_cache_status.rs
@@ -0,0 +1,23 @@
+use crate::AppState;
+use crate::routes::schedule::schema::CacheStatus;
+use actix_web::{get, web};
+
+#[utoipa::path(responses(
+    (status = OK, body = CacheStatus),
+))]
+#[get("/cache-status")]
+pub async fn get_cache_status(app_state: web::Data<AppState>) -> CacheStatus {
+    // Prevent thread lock
+    let has_schedule = app_state
+        .schedule
+        .lock()
+        .as_ref()
+        .map(|res| res.is_some())
+        .unwrap();
+
+    match has_schedule {
+        true => CacheStatus::from(&app_state),
+        false => CacheStatus::default(),
+    }
+    .into()
+}
diff --git a/src/routes/schedule/get_group.rs b/src/routes/schedule/get_group.rs
new file mode 100644
index 0000000..361f169
--- /dev/null
+++ b/src/routes/schedule/get_group.rs
@@ -0,0 +1,99 @@
+use self::schema::*;
+use crate::AppState;
+use crate::database::models::User;
+use crate::extractors::base::SyncExtractor;
+use crate::routes::schema::{IntoResponseAsError, ResponseError};
+use actix_web::{get, web};
+
+#[utoipa::path(responses(
+    (status = OK, body = Response),
+    (
+        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 get_group(
+    user: SyncExtractor<User>,
+    app_state: web::Data<AppState>,
+) -> ServiceResponse {
+    // Prevent thread lock
+    let schedule_lock = app_state.schedule.lock().unwrap();
+
+    match schedule_lock.as_ref() {
+        None => ErrorCode::NoSchedule.into_response(),
+        Some(schedule) => match schedule.data.groups.get(&user.into_inner().group) {
+            None => ErrorCode::NotFound.into_response(),
+            Some(entry) => Ok(entry.clone().into()).into(),
+        },
+    }
+}
+
+mod schema {
+    use crate::parser::schema::ScheduleEntry;
+    use actix_macros::{IntoResponseErrorNamed, StatusCode};
+    use chrono::{DateTime, NaiveDateTime, Utc};
+    use derive_more::Display;
+    use serde::Serialize;
+    use utoipa::ToSchema;
+
+    pub type ServiceResponse = crate::routes::schema::Response<Response, ErrorCode>;
+
+    #[derive(Serialize, ToSchema)]
+    #[schema(as = GetGroup::Response)]
+    #[serde(rename_all = "camelCase")]
+    pub struct Response {
+        /// Расписание группы
+        pub group: ScheduleEntry,
+        
+        /// Устаревшая переменная
+        /// 
+        /// По умолчанию возвращается пустой список
+        #[deprecated = "Will be removed in future versions"]
+        pub updated: Vec<i32>,
+
+        /// Устаревшая переменная
+        ///
+        /// По умолчанию начальная дата по Unix
+        #[deprecated = "Will be removed in future versions"]
+        pub updated_at: DateTime<Utc>,
+    }
+    
+    #[allow(deprecated)]
+    impl From<ScheduleEntry> for Response {
+        fn from(group: ScheduleEntry) -> Self {
+            Self {
+                group,
+                updated: Vec::new(),
+                updated_at: NaiveDateTime::default().and_utc(),
+            }
+        }
+    }
+
+    #[derive(Clone, Serialize, ToSchema, StatusCode, Display, IntoResponseErrorNamed)]
+    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+    #[schema(as = GroupSchedule::ErrorCode)]
+    pub enum ErrorCode {
+        /// Расписания ещё не получены
+        #[status_code = "actix_web::http::StatusCode::SERVICE_UNAVAILABLE"]
+        #[display("Schedule not parsed yet.")]
+        NoSchedule,
+
+        /// Группа не найдена
+        #[status_code = "actix_web::http::StatusCode::NOT_FOUND"]
+        #[display("Required group not found.")]
+        NotFound,
+    }
+}
diff --git a/src/routes/schedule/get_group_names.rs b/src/routes/schedule/get_group_names.rs
new file mode 100644
index 0000000..0b82170
--- /dev/null
+++ b/src/routes/schedule/get_group_names.rs
@@ -0,0 +1,48 @@
+use self::schema::*;
+use crate::AppState;
+use crate::routes::schedule::schema::ErrorCode;
+use crate::routes::schema::{IntoResponseAsError, ResponseError};
+use actix_web::{get, web};
+
+#[utoipa::path(responses(
+    (status = OK, body = Response),
+    (status = SERVICE_UNAVAILABLE, body = ResponseError<ErrorCode>),
+))]
+#[get("/group-names")]
+pub async fn get_group_names(app_state: web::Data<AppState>) -> ServiceResponse {
+    // Prevent thread lock
+    let schedule_lock = app_state.schedule.lock().unwrap();
+
+    match schedule_lock.as_ref() {
+        None => ErrorCode::NoSchedule.into_response(),
+        Some(schedule) => {
+            let mut names: Vec<String> = schedule.data.groups.keys().cloned().collect();
+            names.sort();
+            
+            Ok(names.into()).into()
+        }
+    }
+    .into()
+}
+
+mod schema {
+    use crate::routes::schedule::schema::ErrorCode;
+    use serde::Serialize;
+    use utoipa::ToSchema;
+
+    pub type ServiceResponse = crate::routes::schema::Response<Response, ErrorCode>;
+
+    #[derive(Serialize, ToSchema)]
+    #[schema(as = GetGroupNames::Response)]
+    pub struct Response {
+        /// Список названий групп отсортированный в алфавитном порядке
+        #[schema(examples(json!(["ИС-214/23"])))]
+        pub names: Vec<String>,
+    }
+
+    impl From<Vec<String>> for Response {
+        fn from(names: Vec<String>) -> Self {
+            Self { names }
+        }
+    }
+}
diff --git a/src/routes/schedule/get_schedule.rs b/src/routes/schedule/get_schedule.rs
index 2283c42..4db823a 100644
--- a/src/routes/schedule/get_schedule.rs
+++ b/src/routes/schedule/get_schedule.rs
@@ -1,6 +1,6 @@
 use self::schema::*;
 use crate::app_state::AppState;
-use crate::routes::schedule::schema::{Error, ScheduleView};
+use crate::routes::schedule::schema::{ErrorCode, ScheduleView};
 use crate::routes::schema::{IntoResponseAsError, ResponseError};
 use actix_web::{get, web};
 
@@ -9,30 +9,17 @@ use actix_web::{get, web};
     (status = SERVICE_UNAVAILABLE, body = ResponseError<ErrorCode>)
 ))]
 #[get("/")]
-pub async fn get_schedule(app_state: web::Data<AppState>) -> Response {
-    match ScheduleView::try_from(app_state.get_ref()) {
+pub async fn get_schedule(app_state: web::Data<AppState>) -> ServiceResponse {
+    match ScheduleView::try_from(&app_state) {
         Ok(res) => Ok(res).into(),
         Err(e) => match e {
-            Error::NoSchedule => ErrorCode::NoSchedule.into_response(),
+            ErrorCode::NoSchedule => ErrorCode::NoSchedule.into_response(),
         },
     }
 }
 
 mod schema {
-    use crate::routes::schedule::schema::ScheduleView;
-    use actix_macros::{IntoResponseErrorNamed, StatusCode};
-    use derive_more::Display;
-    use serde::Serialize;
-    use utoipa::ToSchema;
+    use crate::routes::schedule::schema::{ErrorCode, ScheduleView};
 
-    pub type Response = crate::routes::schema::Response<ScheduleView, ErrorCode>;
-
-    #[derive(Clone, Serialize, ToSchema, StatusCode, Display, IntoResponseErrorNamed)]
-    #[status_code = "actix_web::http::StatusCode::SERVICE_UNAVAILABLE"]
-    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
-    #[schema(as = ScheduleView::ErrorCode)]
-    pub enum ErrorCode {
-        #[display("Schedule not parsed yet")]
-        NoSchedule,
-    }
+    pub type ServiceResponse = crate::routes::schema::Response<ScheduleView, ErrorCode>;
 }
diff --git a/src/routes/schedule/get_teacher.rs b/src/routes/schedule/get_teacher.rs
new file mode 100644
index 0000000..63bfc70
--- /dev/null
+++ b/src/routes/schedule/get_teacher.rs
@@ -0,0 +1,97 @@
+use self::schema::*;
+use crate::routes::schema::{IntoResponseAsError, ResponseError};
+use crate::AppState;
+use actix_web::{get, web};
+
+#[utoipa::path(responses(
+    (status = OK, body = Response),
+    (
+        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 teacher not found."
+        })
+    ),
+))]
+#[get("/teacher/{name}")]
+pub async fn get_teacher(
+    name: web::Path<String>,
+    app_state: web::Data<AppState>,
+) -> ServiceResponse {
+    // Prevent thread lock
+    let schedule_lock = app_state.schedule.lock().unwrap();
+
+    match schedule_lock.as_ref() {
+        None => ErrorCode::NoSchedule.into_response(),
+        Some(schedule) => match schedule.data.teachers.get(&name.into_inner()) {
+            None => ErrorCode::NotFound.into_response(),
+            Some(entry) => Ok(entry.clone().into()).into(),
+        },
+    }
+}
+
+mod schema {
+    use crate::parser::schema::ScheduleEntry;
+    use actix_macros::{IntoResponseErrorNamed, StatusCode};
+    use chrono::{DateTime, NaiveDateTime, Utc};
+    use derive_more::Display;
+    use serde::Serialize;
+    use utoipa::ToSchema;
+
+    pub type ServiceResponse = crate::routes::schema::Response<Response, ErrorCode>;
+
+    #[derive(Serialize, ToSchema)]
+    #[schema(as = GetTeacher::Response)]
+    #[serde(rename_all = "camelCase")]
+    pub struct Response {
+        /// Расписание преподавателя
+        pub teacher: ScheduleEntry,
+
+        /// Устаревшая переменная
+        ///
+        /// По умолчанию возвращается пустой список
+        #[deprecated = "Will be removed in future versions"]
+        pub updated: Vec<i32>,
+
+        /// Устаревшая переменная
+        ///
+        /// По умолчанию начальная дата по Unix
+        #[deprecated = "Will be removed in future versions"]
+        pub updated_at: DateTime<Utc>,
+    }
+
+    #[allow(deprecated)]
+    impl From<ScheduleEntry> for Response {
+        fn from(teacher: ScheduleEntry) -> Self {
+            Self {
+                teacher,
+                updated: Vec::new(),
+                updated_at: NaiveDateTime::default().and_utc(),
+            }
+        }
+    }
+
+    #[derive(Clone, Serialize, ToSchema, StatusCode, Display, IntoResponseErrorNamed)]
+    #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+    #[schema(as = TeacherSchedule::ErrorCode)]
+    pub enum ErrorCode {
+        /// Расписания ещё не получены
+        #[status_code = "actix_web::http::StatusCode::SERVICE_UNAVAILABLE"]
+        #[display("Schedule not parsed yet.")]
+        NoSchedule,
+
+        /// Преподаватель не найден
+        #[status_code = "actix_web::http::StatusCode::NOT_FOUND"]
+        #[display("Required teacher not found.")]
+        NotFound,
+    }
+}
diff --git a/src/routes/schedule/get_teacher_names.rs b/src/routes/schedule/get_teacher_names.rs
new file mode 100644
index 0000000..246400d
--- /dev/null
+++ b/src/routes/schedule/get_teacher_names.rs
@@ -0,0 +1,48 @@
+use self::schema::*;
+use crate::AppState;
+use crate::routes::schedule::schema::ErrorCode;
+use crate::routes::schema::{IntoResponseAsError, ResponseError};
+use actix_web::{get, web};
+
+#[utoipa::path(responses(
+    (status = OK, body = Response),
+    (status = SERVICE_UNAVAILABLE, body = ResponseError<ErrorCode>),
+))]
+#[get("/teacher-names")]
+pub async fn get_teacher_names(app_state: web::Data<AppState>) -> ServiceResponse {
+    // Prevent thread lock
+    let schedule_lock = app_state.schedule.lock().unwrap();
+
+    match schedule_lock.as_ref() {
+        None => ErrorCode::NoSchedule.into_response(),
+        Some(schedule) => {
+            let mut names: Vec<String> = schedule.data.teachers.keys().cloned().collect();
+            names.sort();
+
+            Ok(names.into()).into()
+        }
+    }
+    .into()
+}
+
+mod schema {
+    use crate::routes::schedule::schema::ErrorCode;
+    use serde::Serialize;
+    use utoipa::ToSchema;
+
+    pub type ServiceResponse = crate::routes::schema::Response<Response, ErrorCode>;
+
+    #[derive(Serialize, ToSchema)]
+    #[schema(as = GetTeacherNames::Response)]
+    pub struct Response {
+        /// Список имён преподавателей отсортированный в алфавитном порядке
+        #[schema(examples(json!(["Хомченко Н.Е."])))]
+        pub names: Vec<String>,
+    }
+
+    impl From<Vec<String>> for Response {
+        fn from(names: Vec<String>) -> Self {
+            Self { names }
+        }
+    }
+}
diff --git a/src/routes/schedule/mod.rs b/src/routes/schedule/mod.rs
index 1536e95..d319876 100644
--- a/src/routes/schedule/mod.rs
+++ b/src/routes/schedule/mod.rs
@@ -1,2 +1,8 @@
+pub mod get_cache_status;
 pub mod get_schedule;
-mod schema;
\ No newline at end of file
+pub mod get_group;
+pub mod get_group_names;
+pub mod get_teacher;
+pub mod get_teacher_names;
+mod schema;
+pub mod update_download_url;
diff --git a/src/routes/schedule/schema.rs b/src/routes/schedule/schema.rs
index 6f34e84..6259dfa 100644
--- a/src/routes/schedule/schema.rs
+++ b/src/routes/schedule/schema.rs
@@ -1,47 +1,107 @@
-use crate::app_state::AppState;
+use crate::app_state::{AppState, Schedule};
 use crate::parser::schema::ScheduleEntry;
-use chrono::{DateTime, Utc};
-use serde::Serialize;
+use actix_macros::{IntoResponseErrorNamed, ResponderJson, StatusCode};
+use actix_web::web;
+use chrono::{DateTime, Duration, Utc};
+use derive_more::Display;
+use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use utoipa::ToSchema;
 
+/// Ответ от сервера с расписаниями
 #[derive(Serialize, ToSchema)]
+#[serde(rename_all = "camelCase")]
 pub struct ScheduleView {
+    /// ETag расписания на сервере политехникума
     etag: String,
-    replacer_id: Option<String>,
+    
+    /// Дата обновления расписания на сайте политехникума
     uploaded_at: DateTime<Utc>,
+    
+    /// Дата последнего скачивания расписания с сервера политехникума
     downloaded_at: DateTime<Utc>,
+    
+    /// Расписание групп
     groups: HashMap<String, ScheduleEntry>,
+    
+    /// Расписание преподавателей
     teachers: HashMap<String, ScheduleEntry>,
-    updated_groups: Vec<Vec<i32>>,
-    updated_teachers: Vec<Vec<i32>>,
 }
 
-pub enum Error {
+#[derive(Clone, Serialize, ToSchema, StatusCode, Display, IntoResponseErrorNamed)]
+#[status_code = "actix_web::http::StatusCode::SERVICE_UNAVAILABLE"]
+#[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+#[schema(as = ScheduleShared::ErrorCode)]
+pub enum ErrorCode {
+    /// Расписания ещё не получены
+    #[display("Schedule not parsed yet.")]
     NoSchedule,
 }
 
-impl TryFrom<&AppState> for ScheduleView {
-    type Error = Error;
-
-    fn try_from(app_state: &AppState) -> Result<Self, Self::Error> {
-        let schedule_lock = app_state.schedule.lock().unwrap();
-
-        if let Some(schedule_ref) = schedule_lock.as_ref() {
-            let schedule = schedule_ref.clone();
+impl TryFrom<&web::Data<AppState>> for ScheduleView {
+    type Error = ErrorCode;
 
+    fn try_from(app_state: &web::Data<AppState>) -> Result<Self, Self::Error> {
+        if let Some(schedule) = app_state.schedule.lock().unwrap().clone() {
             Ok(Self {
                 etag: schedule.etag,
-                replacer_id: None,
                 uploaded_at: schedule.updated_at,
                 downloaded_at: schedule.parsed_at,
                 groups: schedule.data.groups,
                 teachers: schedule.data.teachers,
-                updated_groups: vec![],
-                updated_teachers: vec![],
             })
         } else {
-            Err(Error::NoSchedule)
+            Err(ErrorCode::NoSchedule)
+        }
+    }
+}
+
+/// Статус кешированного расписаний
+#[derive(Serialize, Deserialize, ToSchema, ResponderJson)]
+#[serde(rename_all = "camelCase")]
+pub struct CacheStatus {
+    /// Хеш расписаний
+    pub cache_hash: String,
+    
+    /// Требуется ли обновить ссылку на расписание
+    pub cache_update_required: bool,
+    
+    /// Дата последнего обновления кеша 
+    pub last_cache_update: i64,
+    
+    /// Дата обновления кешированного расписания
+    /// 
+    /// Определяется сервером политехникума
+    pub last_schedule_update: i64,
+}
+
+impl CacheStatus {
+    pub fn default() -> Self {
+        CacheStatus {
+            cache_hash: "0000000000000000000000000000000000000000".to_string(),
+            cache_update_required: true,
+            last_cache_update: 0,
+            last_schedule_update: 0,
+        }
+    }
+}
+
+impl From<&web::Data<AppState>> for CacheStatus {
+    fn from(value: &web::Data<AppState>) -> Self {
+        let schedule_lock = value.schedule.lock().unwrap();
+        let schedule = schedule_lock.as_ref().unwrap();
+
+        CacheStatus::from(schedule)
+    }
+}
+
+impl From<&Schedule> for CacheStatus {
+    fn from(value: &Schedule) -> Self {
+        Self {
+            cache_hash: value.hash(),
+            cache_update_required: (value.fetched_at - Utc::now()) > Duration::minutes(5),
+            last_cache_update: value.fetched_at.timestamp(),
+            last_schedule_update: value.updated_at.timestamp(),
         }
     }
 }
diff --git a/src/routes/schedule/update_download_url.rs b/src/routes/schedule/update_download_url.rs
new file mode 100644
index 0000000..6c4e7e3
--- /dev/null
+++ b/src/routes/schedule/update_download_url.rs
@@ -0,0 +1,132 @@
+use self::schema::*;
+use crate::AppState;
+use crate::app_state::Schedule;
+use crate::parser::parse_xls;
+use crate::routes::schedule::schema::CacheStatus;
+use crate::routes::schema::{IntoResponseAsError, ResponseError};
+use crate::xls_downloader::interface::XLSDownloader;
+use actix_web::web::Json;
+use actix_web::{patch, web};
+use chrono::Utc;
+
+#[utoipa::path(responses(
+    (status = OK, body = CacheStatus),
+    (status = NOT_ACCEPTABLE, body = ResponseError<ErrorCode>),
+))]
+#[patch("/update-download-url")]
+pub async fn update_download_url(
+    data: Json<Request>,
+    app_state: web::Data<AppState>,
+) -> ServiceResponse {
+    if !data.url.starts_with("https://politehnikum-eng.ru/") {
+        return ErrorCode::NonWhitelistedHost.into_response();
+    }
+
+    let mut downloader = app_state.downloader.lock().unwrap();
+
+    if let Some(url) = &downloader.url {
+        if url.eq(&data.url) {
+            return Ok(CacheStatus::from(&app_state)).into();
+        }
+    }
+
+    match downloader.set_url(data.url.clone()).await {
+        Ok(fetch_result) => {
+            let mut schedule = app_state.schedule.lock().unwrap();
+
+            if schedule.is_some()
+                && fetch_result.uploaded_at < schedule.as_ref().unwrap().updated_at
+            {
+                return ErrorCode::OutdatedSchedule.into_response();
+            }
+
+            match downloader.fetch(false).await {
+                Ok(download_result) => match parse_xls(download_result.data.as_ref().unwrap()) {
+                    Ok(data) => {
+                        *schedule = Some(Schedule {
+                            etag: download_result.etag,
+                            fetched_at: download_result.requested_at,
+                            updated_at: download_result.uploaded_at,
+                            parsed_at: Utc::now(),
+                            data,
+                        });
+
+                        Ok(CacheStatus::from(schedule.as_ref().unwrap())).into()
+                    }
+                    Err(error) => ErrorCode::InvalidSchedule(error).into_response(),
+                },
+                Err(error) => {
+                    eprintln!("Unknown url provided {}", data.url);
+                    eprintln!("{:?}", error);
+
+                    ErrorCode::DownloadFailed.into_response()
+                }
+            }
+        }
+        Err(error) => {
+            eprintln!("Unknown url provided {}", data.url);
+            eprintln!("{:?}", error);
+
+            ErrorCode::FetchFailed.into_response()
+        }
+    }
+}
+
+mod schema {
+    use crate::parser::schema::ParseError;
+    use crate::routes::schedule::schema::CacheStatus;
+    use actix_macros::{IntoResponseErrorNamed, StatusCode};
+    use derive_more::Display;
+    use serde::{Deserialize, Serialize, Serializer};
+    use utoipa::ToSchema;
+
+    pub type ServiceResponse = crate::routes::schema::Response<CacheStatus, ErrorCode>;
+
+    #[derive(Serialize, Deserialize, ToSchema)]
+    pub struct Request {
+        /// Ссылка на расписание
+        pub url: String,
+    }
+
+    #[derive(Clone, ToSchema, StatusCode, Display, IntoResponseErrorNamed)]
+    #[status_code = "actix_web::http::StatusCode::NOT_ACCEPTABLE"]
+    #[schema(as = SetDownloadUrl::ErrorCode)]
+    pub enum ErrorCode {
+        /// Передана ссылка с хостом отличающимся от politehnikum-eng.ru
+        #[display("URL with unknown host provided. Provide url with politehnikum-eng.ru host.")]
+        NonWhitelistedHost,
+
+        /// Не удалось получить мета-данные файла
+        #[display("Unable to retrieve metadata from the specified URL.")]
+        FetchFailed,
+
+        /// Не удалось скачать файл
+        #[display("Unable to retrieve data from the specified URL.")]
+        DownloadFailed,
+
+        /// Ссылка ведёт на устаревшее расписание
+        ///
+        /// Под устаревшим расписанием подразумевается расписание, которое было опубликовано раньше, чем уже имеется на данный момент
+        #[display("The schedule is older than it already is.")]
+        OutdatedSchedule,
+
+        /// Не удалось преобразовать расписание
+        #[display("{}", "_0.display()")]
+        InvalidSchedule(ParseError),
+    }
+
+    impl Serialize for ErrorCode {
+        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+        where
+            S: Serializer,
+        {
+            match self {
+                ErrorCode::NonWhitelistedHost => serializer.serialize_str("NON_WHITELISTED_HOST"),
+                ErrorCode::FetchFailed => serializer.serialize_str("FETCH_FAILED"),
+                ErrorCode::DownloadFailed => serializer.serialize_str("DOWNLOAD_FAILED"),
+                ErrorCode::OutdatedSchedule => serializer.serialize_str("OUTDATED_SCHEDULE"),
+                ErrorCode::InvalidSchedule(_) => serializer.serialize_str("INVALID_SCHEDULE"),
+            }
+        }
+    }
+}
diff --git a/src/routes/schema.rs b/src/routes/schema.rs
index 3a0bce9..15e9e00 100644
--- a/src/routes/schema.rs
+++ b/src/routes/schema.rs
@@ -112,27 +112,31 @@ pub mod user {
     use crate::database::models::{User, UserRole};
     use actix_macros::ResponderJson;
     use serde::Serialize;
-
-    /// UserResponse
-    ///
-    /// Uses for stripping sensitive fields (password, fcm, etc.) from response.
+    
+    /// Используется для скрытия чувствительных полей, таких как хеш пароля или FCM
     #[derive(Serialize, utoipa::ToSchema, ResponderJson)]
     #[serde(rename_all = "camelCase")]
     pub struct UserResponse {
+        /// UUID
         #[schema(examples("67dcc9a9507b0000772744a2"))]
         id: String,
 
+        /// Имя пользователя
         #[schema(examples("n08i40k"))]
         username: String,
 
+        /// Группа
         #[schema(examples("ИС-214/23"))]
         group: String,
 
+        /// Роль
         role: UserRole,
 
+        /// Идентификатор прявязанного аккаунта VK
         #[schema(examples(498094647, json!(null)))]
         vk_id: Option<i32>,
 
+        /// JWT токен доступа
         #[schema(examples(
             "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6IjY3ZGNjOWE5NTA3YjAwMDA3NzI3NDRhMiIsImlhdCI6IjE3NDMxMDgwOTkiLCJleHAiOiIxODY5MjUyMDk5In0.rMgXRb3JbT9AvLK4eiY9HMB5LxgUudkpQyoWKOypZFY"
         ))]
diff --git a/src/test_env.rs b/src/test_env.rs
index 0ad4075..0a679a3 100644
--- a/src/test_env.rs
+++ b/src/test_env.rs
@@ -15,9 +15,10 @@ pub(crate) mod tests {
 
         *schedule_lock = Some(Schedule {
             etag: "".to_string(),
+            fetched_at: Default::default(),
             updated_at: Default::default(),
             parsed_at: Default::default(),
-            data: test_result(),
+            data: test_result().unwrap(),
         });
 
         state.clone()
diff --git a/src/utility/error.rs b/src/utility/error.rs
index 8ef136c..aac46fb 100644
--- a/src/utility/error.rs
+++ b/src/utility/error.rs
@@ -2,6 +2,7 @@ use std::fmt::{Write};
 use std::fmt::Display;
 use serde::{Deserialize, Serialize};
 
+/// Ответ от сервера при ошибках внутри Middleware
 #[derive(Serialize, Deserialize)]
 pub struct ResponseErrorMessage<T: Display> {
     code: T,
diff --git a/src/utility/hasher.rs b/src/utility/hasher.rs
new file mode 100644
index 0000000..83f73da
--- /dev/null
+++ b/src/utility/hasher.rs
@@ -0,0 +1,38 @@
+use sha1::Digest;
+use std::hash::Hasher;
+
+/// Хешер возвращающий хеш из алгоритма реализующего Digest
+pub struct DigestHasher<D: Digest> {
+    digest: D,
+}
+
+impl<D> DigestHasher<D>
+where
+    D: Digest,
+{
+    /// Получение хеша
+    pub fn finalize(self) -> String {
+        hex::encode(self.digest.finalize().0)
+    }
+}
+
+impl<D> From<D> for DigestHasher<D>
+where
+    D: Digest,
+{
+    /// Создания хешера из алгоритма реализующего Digest
+    fn from(digest: D) -> Self {
+        DigestHasher { digest }
+    }
+}
+
+impl<D: Digest> Hasher for DigestHasher<D> {
+    /// Заглушка для предотвращения вызова стандартного результата Hasher
+    fn finish(&self) -> u64 {
+        unimplemented!("Do not call finish()");
+    }
+
+    fn write(&mut self, bytes: &[u8]) {
+        self.digest.update(bytes);
+    }
+}
diff --git a/src/utility/jwt.rs b/src/utility/jwt.rs
index e758e06..0e247a5 100644
--- a/src/utility/jwt.rs
+++ b/src/utility/jwt.rs
@@ -9,22 +9,31 @@ use std::env;
 use std::mem::discriminant;
 use std::sync::LazyLock;
 
+/// Ключ для верификации токена
 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())
 });
 
+/// Ключ для создания подписанного токена
 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())
 });
 
+/// Ошибки верификации токена
+#[allow(dead_code)]
 #[derive(Debug)]
 pub enum Error {
+    /// Токен имеет другую подпись
     InvalidSignature,
+    
+    /// Ошибка чтения токена
     InvalidToken(ErrorKind),
+    
+    /// Токен просрочен
     Expired,
 }
 
@@ -34,18 +43,26 @@ impl PartialEq for Error {
     }
 }
 
+/// Данные, которые хранит в себе токен
 #[serde_as]
 #[derive(Debug, Serialize, Deserialize)]
 struct Claims {
+    /// UUID аккаунта пользователя
     id: String,
+    
+    /// Дата создания токена
     #[serde_as(as = "DisplayFromStr")]
     iat: u64,
+    
+    /// Дата окончания действия токена
     #[serde_as(as = "DisplayFromStr")]
     exp: u64,
 }
 
+/// Алгоритм подписи токенов
 pub(crate) const DEFAULT_ALGORITHM: Algorithm = Algorithm::HS256;
 
+/// Проверка токена и извлечение из него UUID аккаунта пользователя 
 pub fn verify_and_decode(token: &String) -> Result<String, Error> {
     let mut validation = Validation::new(DEFAULT_ALGORITHM);
 
@@ -70,6 +87,7 @@ pub fn verify_and_decode(token: &String) -> Result<String, Error> {
     }
 }
 
+/// Создание токена пользователя
 pub fn encode(id: &String) -> String {
     let header = Header {
         typ: Some(String::from("JWT")),
diff --git a/src/utility/mod.rs b/src/utility/mod.rs
index db9586d..22ace8a 100644
--- a/src/utility/mod.rs
+++ b/src/utility/mod.rs
@@ -1,2 +1,3 @@
 pub mod jwt;
-pub mod error;
\ No newline at end of file
+pub mod error;
+pub mod hasher;
\ No newline at end of file
diff --git a/src/xls_downloader/basic_impl.rs b/src/xls_downloader/basic_impl.rs
index 9d4b06e..bd15e5f 100644
--- a/src/xls_downloader/basic_impl.rs
+++ b/src/xls_downloader/basic_impl.rs
@@ -2,7 +2,7 @@ use crate::xls_downloader::interface::{FetchError, FetchOk, FetchResult, XLSDown
 use chrono::{DateTime, Utc};
 
 pub struct BasicXlsDownloader {
-    url: Option<String>,
+    pub url: Option<String>,
 }
 
 async fn fetch_specified(url: &String, user_agent: String, head: bool) -> FetchResult {
@@ -73,14 +73,14 @@ impl XLSDownloader for BasicXlsDownloader {
         }
     }
 
-    async fn set_url(&mut self, url: String) -> Result<(), FetchError> {
+    async fn set_url(&mut self, url: String) -> FetchResult {
         let result = fetch_specified(&url, "t.me/polytechnic_next".to_string(), true).await;
 
         if let Ok(_) = result {
-            Ok(self.url = Some(url))
-        } else {
-            Err(result.err().unwrap())
+            self.url = Some(url);
         }
+
+        result
     }
 }
 
diff --git a/src/xls_downloader/interface.rs b/src/xls_downloader/interface.rs
index e076cd5..9263880 100644
--- a/src/xls_downloader/interface.rs
+++ b/src/xls_downloader/interface.rs
@@ -1,22 +1,41 @@
 use chrono::{DateTime, Utc};
 
+/// Ошибки получения данных XLS
 #[derive(PartialEq, Debug)]
 pub enum FetchError {
+    /// Не установлена ссылка на файл
     NoUrlProvided,
+
+    /// Неизвестная ошибка
     Unknown,
+
+    /// Сервер вернул статус код отличающийся от 200
     BadStatusCode,
+
+    /// Ссылка ведёт на файл другого типа
     BadContentType,
+
+    /// Сервер не вернул ожидаемые заголовки
     BadHeaders,
 }
 
+/// Результат получения данных XLS
 pub struct FetchOk {
+    /// ETag объекта
     pub etag: String,
+
+    /// Дата загрузки файла
     pub uploaded_at: DateTime<Utc>,
+
+    /// Дата получения данных
     pub requested_at: DateTime<Utc>,
+
+    /// Данные файла
     pub data: Option<Vec<u8>>,
 }
 
 impl FetchOk {
+    /// Результат без контента файла
     pub fn head(etag: String, uploaded_at: DateTime<Utc>) -> Self {
         FetchOk {
             etag,
@@ -26,6 +45,7 @@ impl FetchOk {
         }
     }
 
+    /// Полный результат
     pub fn get(etag: String, uploaded_at: DateTime<Utc>, data: Vec<u8>) -> Self {
         FetchOk {
             etag,
@@ -39,6 +59,9 @@ impl FetchOk {
 pub type FetchResult = Result<FetchOk, FetchError>;
 
 pub trait XLSDownloader {
+    /// Получение данных о файле, и, опционально, его контент
     async fn fetch(&self, head: bool) -> FetchResult;
-    async fn set_url(&mut self, url: String) -> Result<(), FetchError>;
+
+    /// Установка ссылки на файл
+    async fn set_url(&mut self, url: String) -> FetchResult;
 }