Commit

Schedule ICTIS/Utilities/Network/NetworkError.swift

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+//
+//  NetworkError.swift
+//  Schedule ICTIS
+//
+//  Created by Mironov Egor on 18.11.2024.
+//
+
+import Foundation
+
+enum NetworkError: String, Error, LocalizedError {
+    case invalidUrl
+    case invalidResponse
+    case invalidData
+    case noNetwork
+    case noError
+    
+    var errorDescription: String? {
+        switch self {
+        case .invalidUrl:
+            "InvalidUrl"
+        case .invalidResponse:
+            "InvalidResponse"
+        case .invalidData:
+            "Проверьте номер группы"
+        case .noNetwork:
+            "No network connection"
+        case .noError:
+            "Нет ошибки"
+        }
+    }
+    
+    var failureReason: String {
+        switch self {
+        case .invalidUrl:
+            "Похоже не удалось составить ссылку для api"
+        case .invalidResponse:
+            "Для этой недели расписания еще нет"
+        case .invalidData:
+            "Похоже такой группы не существует"
+        case .noNetwork:
+            "Проверьте подключение к интернету и попробуйте заново"
+        case .noError:
+            "Ошибки нет"
+        }
+    }
+}

Schedule ICTIS/Utilities/Network/NetworkManager.swift

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+//
+//  NetworkManager.swift
+//  Schedule ICTIS
+//
+//  Created by Mironov Egor on 18.11.2024.
+//
+
+import Foundation
+
+final class NetworkManager {
+    //"https://webictis.sfedu.ru/schedule-api/?group=51.html&week=15"
+    //MARK: Properties
+    static let shared = NetworkManager()
+    private let decoder = JSONDecoder()
+    private let urlForGroup = "https://webictis.sfedu.ru/schedule-api/?query="
+    private let urlForWeek = "https://webictis.sfedu.ru/schedule-api/?group="
+    
+    //MARK: Initializer
+    private init() {
+        decoder.dateDecodingStrategy = .iso8601
+    }
+    
+    //MARK: Methods
+    func makeUrlForGroup(_ group: String) -> String {
+        return urlForGroup + group
+    }
+    
+    func makeUrlForWeek(_ numOfWeek: Int, _ htmlNameOfGroup: String) -> String {
+        return urlForWeek + htmlNameOfGroup + "&week=" + String(numOfWeek)
+    }
+    
+    func getSchedule(_ group: String) async throws -> Schedule {
+        let newUrlForGroup = makeUrlForGroup(group)
+        guard let url = URL(string: newUrlForGroup) else {throw NetworkError.invalidUrl}
+        let (data, response) = try await URLSession.shared.data(from: url)
+        guard let response = response as? HTTPURLResponse, response.statusCode == 200 else {throw NetworkError.invalidResponse}
+        
+        do {
+            return try decoder.decode(Schedule.self, from: data)
+        }
+        catch {
+            throw NetworkError.invalidData
+        }
+    }
+    
+    func getScheduleForOtherWeek(_ numOfWeek: Int, _ htmlNameOfGroup: String) async throws -> Schedule {
+        let newUrlForWeek = makeUrlForWeek(numOfWeek, htmlNameOfGroup)
+        print(newUrlForWeek)
+        guard let url = URL(string: newUrlForWeek) else {throw NetworkError.invalidUrl}
+        let (data, response) = try await URLSession.shared.data(from: url)
+        guard let response = response as? HTTPURLResponse, response.statusCode == 200 else {throw NetworkError.invalidResponse}
+        
+        do {
+            return try decoder.decode(Schedule.self, from: data)
+        }
+        catch {
+            throw NetworkError.invalidData
+        }
+    }
+}