added loading screen; improvements

lib/main.dart

@@ -1,80 +1,42 @@
-import 'package:camera/camera.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
-import 'package:share_location/constants/apis.dart';
 import 'package:share_location/screens/calendar_screen.dart';
 import 'package:share_location/screens/grant_permission_screen.dart';
 import 'package:share_location/screens/login_screen.dart';
 import 'package:share_location/screens/main_screen.dart';
+import 'package:share_location/screens/server_loading_screen.dart';
 import 'package:share_location/screens/timeline_screen.dart';
 import 'package:share_location/screens/welcome_screen.dart';
-import 'package:share_location/utils/auth_required.dart';
-import 'package:supabase_flutter/supabase_flutter.dart';
 
-import 'managers/global_values_manager.dart';
-import 'managers/startup_page_manager.dart';
 import 'models/memories.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
 
-  await Supabase.initialize(
-    url: SUPABASE_API_URL,
-    anonKey: SUPABASE_API_KEY,
-    debug: kDebugMode,
-  );
-
   SystemChrome.setPreferredOrientations([
     DeviceOrientation.portraitUp,
     DeviceOrientation.portraitDown,
   ]);
 
-  GlobalValuesManager.setCameras(await availableCameras());
-
-  final initialPage = await StartupPageManager.getPage();
-
-  runApp(MyApp(initialPage: initialPage));
+  runApp(MyApp());
 }
 
 class MyApp extends StatefulWidget {
-  final String initialPage;
-
   const MyApp({
     Key? key,
-    required this.initialPage,
   }) : super(key: key);
 
   @override
   State<MyApp> createState() => _MyAppState();
 }
 
-class _MyAppState extends AuthRequiredState<MyApp> {
+class _MyAppState extends State<MyApp> {
   final memories = Memories();
 
-  @override
-  void initState() {
-    super.initState();
-
-    memories.addListener(() {
-      setState(() {
-
-      });
-    }, ['isInitializing']);
-  }
-
-  @override
-  void onAuthenticated(Session session) {
-    memories.initialize();
-  }
-
   @override
   Widget build(BuildContext context) {
-    if (memories.isInitializing) {
-      return SizedBox();
-    }
-
     return ChangeNotifierProvider.value(
       value: memories,
       child: MaterialApp(
@@ -102,8 +64,9 @@ class _MyAppState extends AuthRequiredState<MyApp> {
           TimelineScreen.ID: (context) => const TimelineScreen(),
           GrantPermissionScreen.ID: (context) => const GrantPermissionScreen(),
           CalendarScreen.ID: (context) => const CalendarScreen(),
+          ServerLoadingScreen.ID: (context) => const ServerLoadingScreen(),
         },
-        initialRoute: widget.initialPage,
+        initialRoute: ServerLoadingScreen.ID,
       ),
     );
   }

lib/screens/main_screen.dart

@@ -248,8 +248,16 @@ class _MainScreenState extends AuthRequiredState<MainScreen> with Loadable {
       backgroundColor: Colors.black,
       bottomSheet: () {
         if (isLoading) {
-          return const Center(
-            child: CircularProgressIndicator(),
+          return Center(
+            child: Column(
+              mainAxisAlignment: MainAxisAlignment.center,
+              crossAxisAlignment: CrossAxisAlignment.center,
+              children: const <Widget>[
+                CircularProgressIndicator(),
+                SizedBox(height: MEDIUM_SPACE),
+                Text('Loading camera'),
+              ],
+            ),
           );
         }
 

lib/screens/server_loading_screen.dart

@@ -0,0 +1,95 @@
+import 'package:camera/camera.dart';
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:share_location/constants/apis.dart';
+import 'package:share_location/constants/spacing.dart';
+import 'package:share_location/managers/global_values_manager.dart';
+import 'package:share_location/models/memories.dart';
+import 'package:share_location/widgets/dot_animation.dart';
+import 'package:supabase_flutter/supabase_flutter.dart';
+
+import 'main_screen.dart';
+import 'welcome_screen.dart';
+
+class ServerLoadingScreen extends StatefulWidget {
+  static const ID = 'server_loading';
+
+  const ServerLoadingScreen({Key? key}) : super(key: key);
+
+  @override
+  State<ServerLoadingScreen> createState() => _ServerLoadingScreenState();
+}
+
+class _ServerLoadingScreenState extends State<ServerLoadingScreen> {
+  @override
+  void initState() {
+    super.initState();
+
+    load();
+  }
+
+  Future<void> load() async {
+    GlobalValuesManager.setCameras(await availableCameras());
+    await Supabase.initialize(
+      url: SUPABASE_API_URL,
+      anonKey: SUPABASE_API_KEY,
+      debug: kDebugMode,
+    );
+
+    final memories = context.read<Memories>();
+    final session = Supabase.instance.client.auth.session();
+
+    if (session != null) {
+      memories.initialize().then((_) {
+        Navigator.pushReplacementNamed(context, MainScreen.ID);
+      });
+    } else {
+      Navigator.pushReplacementNamed(context, WelcomeScreen.ID);
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: Colors.black,
+      body: Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          crossAxisAlignment: CrossAxisAlignment.center,
+          children: const <Widget>[
+            Icon(Icons.cloud, size: 60),
+            SizedBox(height: SMALL_SPACE),
+            DotAnimation(
+              initialFadeInDelay: Duration.zero,
+              fadeInDuration: Duration(seconds: 1),
+              fadeOutDuration: Duration(seconds: 1),
+              fadeInDelay: Duration(seconds: 6),
+              fadeOutDelay: Duration.zero,
+            ),
+            DotAnimation(
+              initialFadeInDelay: Duration(seconds: 2),
+              fadeInDuration: Duration(seconds: 1),
+              fadeOutDuration: Duration(seconds: 1),
+              fadeInDelay: Duration(seconds: 6),
+              fadeOutDelay: Duration.zero,
+            ),
+            DotAnimation(
+              initialFadeInDelay: Duration(seconds: 4),
+              fadeInDuration: Duration(seconds: 1),
+              fadeOutDuration: Duration(seconds: 1),
+              fadeInDelay: Duration(seconds: 6),
+              fadeOutDelay: Duration.zero,
+            ),
+            SizedBox(height: SMALL_SPACE),
+            Icon(Icons.smartphone, size: 60),
+            SizedBox(height: LARGE_SPACE),
+            Text(
+              'We are loading your data',
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/widgets/dot_animation.dart

@@ -0,0 +1,95 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+
+class DotAnimation extends StatefulWidget {
+  final Duration fadeInDuration;
+  final Duration fadeOutDuration;
+  final Duration fadeInDelay;
+  final Duration fadeOutDelay;
+  final Duration? initialFadeInDelay;
+  final Curve curve;
+
+  const DotAnimation({
+    Key? key,
+    this.fadeInDuration = const Duration(seconds: 2),
+    this.fadeOutDuration = const Duration(seconds: 2),
+    this.curve = Curves.easeOut,
+    this.fadeInDelay = const Duration(seconds: 1),
+    this.fadeOutDelay = const Duration(seconds: 1),
+    this.initialFadeInDelay,
+  }) : super(key: key);
+
+  @override
+  State<DotAnimation> createState() => _DotAnimationState();
+}
+
+class _DotAnimationState extends State<DotAnimation> {
+  Timer? _timer;
+  bool animateIn = false;
+
+  Duration get initialFadeInDelay =>
+      widget.initialFadeInDelay ?? widget.fadeInDelay;
+
+  @override
+  void initState() {
+    super.initState();
+
+    _timer = Timer(initialFadeInDelay, () {
+      setState(() {
+        animateIn = true;
+      });
+    });
+  }
+
+  @override
+  void dispose() {
+    _timer?.cancel();
+
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AnimatedScale(
+      duration: animateIn ? widget.fadeInDuration : widget.fadeOutDuration,
+      scale: animateIn ? 1 : .4,
+      curve: widget.curve,
+      onEnd: () {
+        if (animateIn) {
+          // Animate out
+          _timer = Timer(widget.fadeOutDelay, () {
+            if (mounted) {
+              return;
+            }
+
+            setState(() {
+              animateIn = false;
+            });
+          });
+        } else {
+          // Animate in
+          _timer = Timer(widget.fadeInDelay, () {
+            if (mounted) {
+              return;
+            }
+
+            setState(() {
+              animateIn = true;
+            });
+          });
+        }
+      },
+      child: AnimatedOpacity(
+        opacity: animateIn ? 1 : .4,
+        duration: animateIn ? widget.fadeInDuration : widget.fadeOutDuration,
+        curve: widget.curve,
+        child: const Icon(
+          Icons.circle,
+          size: 30,
+          color: Colors.white,
+        ),
+      ),
+    );
+  }
+}