add caching next lessons for ios widget

ios/Runner.xcodeproj/project.pbxproj

@@ -11,6 +11,8 @@
 		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
 		4AC4552286D0AE5C2D060267 /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = B630AA0B7629E0911B1F13C6 /* Pods_Runner.framework */; };
 		74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74858FAE1ED2DC5600515810 /* AppDelegate.swift */; };
+		7C85D8B02B51D8EB002E371C /* LessonRepository.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7C85D8AF2B51D8EB002E371C /* LessonRepository.swift */; };
+		7C85D8B12B51D8EB002E371C /* LessonRepository.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7C85D8AF2B51D8EB002E371C /* LessonRepository.swift */; };
 		7CBA2ACC2A9284E800F8DB4E /* WidgetKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 7CBA2ACB2A9284E800F8DB4E /* WidgetKit.framework */; };
 		7CBA2ACE2A9284E800F8DB4E /* SwiftUI.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 7CBA2ACD2A9284E800F8DB4E /* SwiftUI.framework */; };
 		7CBA2AD12A9284E800F8DB4E /* UWidgetBundle.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7CBA2AD02A9284E800F8DB4E /* UWidgetBundle.swift */; };
@@ -67,6 +69,7 @@
 		74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Runner-Bridging-Header.h"; sourceTree = "<group>"; };
 		74858FAE1ED2DC5600515810 /* AppDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };
+		7C85D8AF2B51D8EB002E371C /* LessonRepository.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LessonRepository.swift; sourceTree = "<group>"; };
 		7CBA2ACA2A9284E800F8DB4E /* UWidgetExtension.appex */ = {isa = PBXFileReference; explicitFileType = "wrapper.app-extension"; includeInIndex = 0; path = UWidgetExtension.appex; sourceTree = BUILT_PRODUCTS_DIR; };
 		7CBA2ACB2A9284E800F8DB4E /* WidgetKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = WidgetKit.framework; path = System/Library/Frameworks/WidgetKit.framework; sourceTree = SDKROOT; };
 		7CBA2ACD2A9284E800F8DB4E /* SwiftUI.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = SwiftUI.framework; path = System/Library/Frameworks/SwiftUI.framework; sourceTree = SDKROOT; };
@@ -141,6 +144,7 @@
 				7CBA2AD62A9284E900F8DB4E /* Info.plist */,
 				7CBA2AE12A929F8700F8DB4E /* Lesson.swift */,
 				7CBA2AE42A92A04300F8DB4E /* LessonDataProvider.swift */,
+				7C85D8AF2B51D8EB002E371C /* LessonRepository.swift */,
 			);
 			path = UWidget;
 			sourceTree = "<group>";
@@ -377,6 +381,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				7CBA2AE62A92A04300F8DB4E /* LessonDataProvider.swift in Sources */,
+				7C85D8B12B51D8EB002E371C /* LessonRepository.swift in Sources */,
 				7CBA2AD12A9284E800F8DB4E /* UWidgetBundle.swift in Sources */,
 				7CBA2AE32A92A00700F8DB4E /* Lesson.swift in Sources */,
 				7CBA2AD32A9284E800F8DB4E /* UWidget.swift in Sources */,
@@ -388,6 +393,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				7CBA2AE52A92A04300F8DB4E /* LessonDataProvider.swift in Sources */,
+				7C85D8B02B51D8EB002E371C /* LessonRepository.swift in Sources */,
 				74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */,
 				7CBA2AE22A929F8700F8DB4E /* Lesson.swift in Sources */,
 				1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */,

ios/UWidget/LessonDataProvider.swift

@@ -16,7 +16,7 @@ struct LessonResponse: Codable {
 }
 
 protocol DataProvider {
-    func fetchData(groupId: Int, completion: @escaping (Lesson?) -> Void)
+    func fetchData(groupId: Int, completion: @escaping ([Lesson]?) -> Void)
     // Add any other methods or properties that the data provider should have.
 }
 
@@ -27,7 +27,7 @@ class ServerDataProvider: DataProvider {
         self.baseURL = baseURL
     }
 
-    func fetchData(groupId: Int, completion: @escaping (Lesson?) -> Void) {
+    func fetchData(groupId: Int, completion: @escaping ([Lesson]?) -> Void) {
         // Create a URL object
         guard let url = URL(string: "\(baseURL)/group/\(groupId)/lessons/next") else {
             print("Invalid URL")
@@ -71,7 +71,7 @@ class ServerDataProvider: DataProvider {
                     })
                     let lessonResponse = try decoder.decode(LessonResponse.self, from: data)
 
-                    completion(lessonResponse.lessons.first)
+                    completion(lessonResponse.lessons)
                 } catch {
                     print("Decoding error: \(error)")
                     completion(nil)
@@ -88,3 +88,55 @@ class ServerDataProvider: DataProvider {
 
     // Implement any other methods from the DataProvider protocol.
 }
+
+extension FileManager {
+    static func documentsDirectory() -> URL {
+        return FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
+    }
+}
+
+
+struct LessonsRecord: Codable {
+    let lessons: [Lesson]
+    let savedDate: Date
+    let groupId: Int
+}
+
+protocol ILocalLessonDataProvider {
+    func fetchData(groupId: Int) -> LessonsRecord?
+    func saveData(lessonsRecord: LessonsRecord)
+}
+
+class LocalLessonDataProvider: ILocalLessonDataProvider {
+    func fetchData(groupId: Int) -> LessonsRecord? {
+        let url = getUrl(groupId: groupId)
+
+        do {
+            let data = try Data(contentsOf: url)
+            let decoder = JSONDecoder()
+            decoder.dateDecodingStrategy = .iso8601
+            return try decoder.decode(LessonsRecord.self, from: data)
+        } catch {
+            print("Error loading lessons from LocalLessonDataProvider: \(error)")
+            return nil
+        }
+    }
+
+    func saveData(lessonsRecord: LessonsRecord) {
+        let encoder = JSONEncoder()
+        encoder.dateEncodingStrategy = .iso8601
+
+        do {
+            let data = try encoder.encode(lessonsRecord)
+            let url = getUrl(groupId: lessonsRecord.groupId)
+            try data.write(to: url)
+        } catch {
+            print("Error saving lessons to LocalLessonDataProvider: \(error)")
+        }
+    }
+
+    func getUrl(groupId: Int) -> URL {
+        return FileManager.documentsDirectory().appendingPathComponent("lessons_\(groupId)")
+    }
+}
+

ios/UWidget/LessonRepository.swift

@@ -0,0 +1,55 @@
+//
+//  LessonRepository.swift
+//  Runner
+//
+//  Created by Oleg on 12.01.2024.
+//
+
+import Foundation
+
+protocol ILessonRepository {
+    func fetchData(groupId: Int, completion: @escaping (Lesson?) -> Void)
+}
+
+class LessonRepository : ILessonRepository {
+    let remoteDataProvider: DataProvider
+    let localDataProvider: ILocalLessonDataProvider
+
+    init(remoteDataProvider: DataProvider, localDataProvider: ILocalLessonDataProvider) {
+        self.remoteDataProvider = remoteDataProvider
+        self.localDataProvider = localDataProvider
+    }
+
+    func fetchData(groupId: Int, completion: @escaping (Lesson?) -> Void) {
+        self.remoteDataProvider.fetchData(groupId: groupId) { lessons in
+            if (lessons == nil) {
+                let lessonsRecord = self.localDataProvider.fetchData(groupId: groupId)
+
+                if (lessonsRecord == nil) {
+                    completion(nil)
+                    return
+                }
+
+                let lessons = lessonsRecord?.lessons
+
+                if (lessons == nil || lessons?.isEmpty ?? true) {
+                    completion(nil)
+                    return
+                }
+
+                completion(lessons?.first)
+                return
+            }
+
+            if let lessons = lessons {
+                let lessonsRecord = LessonsRecord(
+                    lessons: lessons, savedDate: Date(), groupId: groupId
+                )
+
+                self.localDataProvider.saveData(lessonsRecord: lessonsRecord)
+
+                completion(lessons.first)
+            }
+        }
+    }
+}

ios/UWidget/UWidget.swift

@@ -44,7 +44,13 @@ struct Provider: TimelineProvider {
 
         print("groupId \(groupId)")
 
-        let dataProvider: DataProvider = ServerDataProvider(baseURL: "https://roadmapik.com:5000")
+        let dataProvider: ILessonRepository = LessonRepository(
+                remoteDataProvider: ServerDataProvider(
+                    baseURL: "https://roadmapik.com:5000"
+                ),
+                localDataProvider: LocalLessonDataProvider()
+            )
+
         dataProvider.fetchData(groupId: groupId) { lesson in
                     let entry = SimpleEntry(date: Date(), lesson: lesson, isResponseFromServer: true)
                     let nextUpdateDate = Calendar.current.date(byAdding: .minute, value: 30, to: Date())!

lib/feature/initialization/data/initialize_dependencies.dart

@@ -34,6 +34,7 @@ Future<Dependencies> $initializeDependencies({
       );
     }
   }
+
   return dependencies;
 }
 

lib/feature/schedule/widget/schedule_page.dart

@@ -4,7 +4,6 @@ import 'dart:developer';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:intl/date_symbol_data_local.dart';
-import 'package:l/l.dart';
 import 'package:octopus/octopus.dart';
 import 'package:uneconly/common/localization/localization.dart';
 import 'package:uneconly/common/model/dependencies.dart';

lib/feature/settings/widget/settings_page.dart

@@ -173,6 +173,20 @@ class _SettingsPageState extends State<SettingsPage> {
               //   ],
               // ),
 
+              // Open ListSectionInsetExample widget
+              // CupertinoButton(
+              //   onPressed: () {
+              //     Navigator.of(context).push(
+              //       CupertinoPageRoute<void>(
+              //         builder: (BuildContext context) {
+              //           return const ListSectionInsetExample();
+              //         },
+              //       ),
+              //     );
+              //   },
+              //   child: const Text('Open ListSectionInsetExample'),
+              // ),
+
               Text('${AppLocalizations.of(context)!.theme}: '),
               const SizedBox(height: 10),
               // horizontal list of themes
@@ -238,3 +252,122 @@ class _SettingsPageState extends State<SettingsPage> {
     );
   }
 }
+
+class CupertinoListSectionInsetApp extends StatelessWidget {
+  const CupertinoListSectionInsetApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return const CupertinoApp(
+      home: ListSectionInsetExample(),
+    );
+  }
+}
+
+class ListSectionInsetExample extends StatefulWidget {
+  const ListSectionInsetExample({super.key});
+
+  @override
+  State<ListSectionInsetExample> createState() =>
+      _ListSectionInsetExampleState();
+}
+
+class _ListSectionInsetExampleState extends State<ListSectionInsetExample> {
+  bool _isNotificationsEnabled = true;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('ListSectionInsetExample'),
+      ),
+      body: CupertinoListSection.insetGrouped(
+        header: const Text('My Settings'),
+        children: <CupertinoListTile>[
+          CupertinoListTile.notched(
+            title: const Text('Open pull request'),
+            leading: Container(
+              width: double.infinity,
+              height: double.infinity,
+              color: CupertinoColors.activeGreen,
+            ),
+            trailing: const CupertinoListTileChevron(),
+            onTap: () => Navigator.of(context).push(
+              CupertinoPageRoute<void>(
+                builder: (BuildContext context) {
+                  return const _SecondPage(text: 'Open pull request');
+                },
+              ),
+            ),
+          ),
+          CupertinoListTile.notched(
+            title: const Text('Push to master'),
+            leading: Container(
+              width: double.infinity,
+              height: double.infinity,
+              color: CupertinoColors.systemRed,
+            ),
+            additionalInfo: const Text('Not available'),
+          ),
+          CupertinoListTile.notched(
+            title: const Text('View last commit'),
+            leading: Container(
+              width: double.infinity,
+              height: double.infinity,
+              color: CupertinoColors.activeOrange,
+            ),
+            additionalInfo: const Text('12 days ago'),
+            trailing: const CupertinoListTileChevron(),
+            onTap: () => Navigator.of(context).push(
+              CupertinoPageRoute<void>(
+                builder: (BuildContext context) {
+                  return const _SecondPage(text: 'Last commit');
+                },
+              ),
+            ),
+          ),
+          CupertinoListTile.notched(
+            title: const Text('Notifications'),
+            leading: Container(
+              width: double.infinity,
+              height: double.infinity,
+              color: CupertinoColors.activeBlue,
+            ),
+            trailing: CupertinoSwitch(
+              value: _isNotificationsEnabled,
+              onChanged: (value) {
+                setState(
+                  () {
+                    _isNotificationsEnabled = value;
+                  },
+                );
+              },
+            ),
+            onTap: () => Navigator.of(context).push(
+              CupertinoPageRoute<void>(
+                builder: (BuildContext context) {
+                  return const _SecondPage(text: 'Last commit');
+                },
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+class _SecondPage extends StatelessWidget {
+  const _SecondPage({required this.text});
+
+  final String text;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Center(
+        child: Text(text),
+      ),
+    );
+  }
+}