Refactor/lazy provider

uni/android/build.gradle

@@ -26,6 +26,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
+tasks.register("clean", Delete) {
     delete rootProject.buildDir
-}
+}

uni/lib/controller/background_workers/notifications.dart

@@ -83,7 +83,7 @@ class NotificationManager {
   }
 
   void initializeNotifications() async {
-    //guarentees that the execution is only done once in the lifetime of the app.
+    // guarantees that the execution is only done once in the lifetime of the app.
     if (_initialized) return;
     _initialized = true;
     _initFlutterNotificationsPlugin();

uni/lib/controller/local_storage/app_shared_preferences.dart

@@ -12,12 +12,14 @@ import 'package:uni/utils/favorite_widget_type.dart';
 /// This database stores the user's student number, password and favorite
 /// widgets.
 class AppSharedPreferences {
+  static const lastUpdateTimeKeySuffix = "_last_update_time";
   static const String userNumber = 'user_number';
   static const String userPw = 'user_password';
   static const String userFaculties = 'user_faculties';
   static const String termsAndConditions = 'terms_and_conditions';
   static const String areTermsAndConditionsAcceptedKey = 'is_t&c_accepted';
-  static const String tuitionNotificationsToggleKey = "tuition_notification_toogle";
+  static const String tuitionNotificationsToggleKey =
+      "tuition_notification_toogle";
   static const String themeMode = 'theme_mode';
   static const int keyLength = 32;
   static const int ivLength = 16;
@@ -33,6 +35,20 @@ class AppSharedPreferences {
   static const String filteredExamsTypes = 'filtered_exam_types';
   static final List<String> defaultFilteredExamTypes = Exam.displayedTypes;
 
+  /// Returns the last time the data with given key was updated.
+  static Future<DateTime?> getLastDataClassUpdateTime(String dataKey) async {
+    final prefs = await SharedPreferences.getInstance();
+    final lastUpdateTime = prefs.getString(dataKey + lastUpdateTimeKeySuffix);
+    return lastUpdateTime != null ? DateTime.parse(lastUpdateTime) : null;
+  }
+
+  /// Sets the last time the data with given key was updated.
+  static Future<void> setLastDataClassUpdateTime(
+      String dataKey, DateTime dateTime) async {
+    final prefs = await SharedPreferences.getInstance();
+    prefs.setString(dataKey + lastUpdateTimeKeySuffix, dateTime.toString());
+  }
+
   /// Saves the user's student number, password and faculties.
   static Future savePersistentUserInfo(user, pass, faculties) async {
     final prefs = await SharedPreferences.getInstance();
@@ -203,14 +219,13 @@ class AppSharedPreferences {
     return encrypt.Encrypter(encrypt.AES(key));
   }
 
-  static Future<bool> getTuitionNotificationToggle() async{
+  static Future<bool> getTuitionNotificationToggle() async {
     final prefs = await SharedPreferences.getInstance();
     return prefs.getBool(tuitionNotificationsToggleKey) ?? true;
   }
 
-  static setTuitionNotificationToggle(bool value) async{
+  static setTuitionNotificationToggle(bool value) async {
     final prefs = await SharedPreferences.getInstance();
     prefs.setBool(tuitionNotificationsToggleKey, value);
   }
-
 }

uni/lib/controller/networking/network_router.dart

@@ -7,6 +7,7 @@ import 'package:logger/logger.dart';
 import 'package:synchronized/synchronized.dart';
 import 'package:uni/controller/local_storage/app_shared_preferences.dart';
 import 'package:uni/model/entities/session.dart';
+import 'package:uni/view/navigation_service.dart';
 
 extension UriString on String {
   /// Converts a [String] to an [Uri].
@@ -16,13 +17,9 @@ extension UriString on String {
 /// Manages the networking of the app.
 class NetworkRouter {
   static http.Client? httpClient;
-
   static const int loginRequestTimeout = 20;
-
   static Lock loginLock = Lock();
 
-  static Function onReloginFail = () {};
-
   /// Creates an authenticated [Session] on the given [faculty] with the
   /// given username [user] and password [pass].
   static Future<Session> login(String user, String pass, List<String> faculties,
@@ -52,7 +49,7 @@ class NetworkRouter {
   }
 
   /// Determines if a re-login with the [session] is possible.
-  static Future<bool> relogin(Session session) {
+  static Future<bool> reLogin(Session session) {
     return loginLock.synchronized(() async {
       if (!session.persistentSession) {
         return false;
@@ -94,10 +91,11 @@ class NetworkRouter {
 
   /// Returns the response body of the login in Sigarra
   /// given username [user] and password [pass].
-  static Future<String> loginInSigarra(String user, String pass, List<String> faculties) async {
+  static Future<String> loginInSigarra(
+      String user, String pass, List<String> faculties) async {
     final String url =
         '${NetworkRouter.getBaseUrls(faculties)[0]}vld_validacao.validacao';
-    
+
     final response = await http.post(url.toUri(), body: {
       'p_user': user,
       'p_pass': pass
@@ -149,12 +147,12 @@ class NetworkRouter {
       return response;
     } else if (response.statusCode == 403 && !(await userLoggedIn(session))) {
       // HTTP403 - Forbidden
-      final bool reLoginSuccessful = await relogin(session);
+      final bool reLoginSuccessful = await reLogin(session);
       if (reLoginSuccessful) {
         headers['cookie'] = session.cookies;
         return http.get(url.toUri(), headers: headers);
       } else {
-        onReloginFail();
+        NavigationService.logout();
         Logger().e('Login failed');
         return Future.error('Login failed');
       }

uni/lib/main.dart

@@ -9,22 +9,18 @@ import 'package:provider/provider.dart';
 import 'package:sentry_flutter/sentry_flutter.dart';
 import 'package:uni/controller/background_workers/background_callback.dart';
 import 'package:uni/controller/local_storage/app_shared_preferences.dart';
-import 'package:uni/controller/on_start_up.dart';
-import 'package:uni/model/providers/bus_stop_provider.dart';
-import 'package:uni/model/providers/calendar_provider.dart';
-import 'package:uni/model/providers/exam_provider.dart';
-import 'package:uni/model/providers/faculty_locations_provider.dart';
-import 'package:uni/model/providers/favorite_cards_provider.dart';
-import 'package:uni/model/providers/home_page_editing_mode_provider.dart';
-import 'package:uni/model/providers/last_user_info_provider.dart';
-import 'package:uni/model/providers/lecture_provider.dart';
-import 'package:uni/model/providers/library_occupation_provider.dart';
-import 'package:uni/model/providers/profile_state_provider.dart';
-import 'package:uni/model/providers/reference_provider.dart';
-import 'package:uni/model/providers/restaurant_provider.dart';
-import 'package:uni/model/providers/session_provider.dart';
+import 'package:uni/model/providers/lazy/bus_stop_provider.dart';
+import 'package:uni/model/providers/lazy/calendar_provider.dart';
+import 'package:uni/model/providers/lazy/exam_provider.dart';
+import 'package:uni/model/providers/lazy/faculty_locations_provider.dart';
+import 'package:uni/model/providers/lazy/home_page_provider.dart';
+import 'package:uni/model/providers/lazy/lecture_provider.dart';
+import 'package:uni/model/providers/lazy/library_occupation_provider.dart';
+import 'package:uni/model/providers/lazy/reference_provider.dart';
+import 'package:uni/model/providers/lazy/restaurant_provider.dart';
+import 'package:uni/model/providers/startup/profile_provider.dart';
+import 'package:uni/model/providers/startup/session_provider.dart';
 import 'package:uni/model/providers/state_providers.dart';
-import 'package:uni/model/providers/user_faculties_provider.dart';
 import 'package:uni/utils/drawer_items.dart';
 import 'package:uni/view/about/about.dart';
 import 'package:uni/view/bug_report/bug_report.dart';
@@ -34,10 +30,10 @@ import 'package:uni/view/common_widgets/page_transition.dart';
 import 'package:uni/view/course_units/course_units.dart';
 import 'package:uni/view/exams/exams.dart';
 import 'package:uni/view/home/home.dart';
+import 'package:uni/view/library/library.dart';
 import 'package:uni/view/locations/locations.dart';
 import 'package:uni/view/logout_route.dart';
 import 'package:uni/view/navigation_service.dart';
-import 'package:uni/view/library/library.dart';
 import 'package:uni/view/restaurant/restaurant_page_view.dart';
 import 'package:uni/view/schedule/schedule.dart';
 import 'package:uni/view/splash/splash.dart';
@@ -56,18 +52,14 @@ Future<void> main() async {
       ExamProvider(),
       BusStopProvider(),
       RestaurantProvider(),
-      ProfileStateProvider(),
+      ProfileProvider(),
       SessionProvider(),
       CalendarProvider(),
       LibraryOccupationProvider(),
       FacultyLocationsProvider(),
-      LastUserInfoProvider(),
-      UserFacultiesProvider(),
-      FavoriteCardsProvider(),
-      HomePageEditingModeProvider(),
+      HomePageProvider(),
       ReferenceProvider());
 
-  OnStartUp.onStart(stateProviders.sessionProvider);
   WidgetsFlutterBinding.ensureInitialized();
 
   await Workmanager().initialize(workerStartCallback,
@@ -110,15 +102,7 @@ Future<void> main() async {
                       create: (context) =>
                           stateProviders.facultyLocationsProvider),
                   ChangeNotifierProvider(
-                      create: (context) => stateProviders.lastUserInfoProvider),
-                  ChangeNotifierProvider(
-                      create: (context) =>
-                          stateProviders.userFacultiesProvider),
-                  ChangeNotifierProvider(
-                      create: (context) =>
-                          stateProviders.favoriteCardsProvider),
-                  ChangeNotifierProvider(
-                      create: (context) => stateProviders.homePageEditingMode),
+                      create: (context) => stateProviders.homePageProvider),
                   ChangeNotifierProvider(
                       create: (context) => stateProviders.referenceProvider),
                 ],