created first prototype of timeline screen

lib/main.dart

@@ -4,6 +4,7 @@ import 'package:flutter/material.dart';
 import 'package:share_location/constants/apis.dart';
 import 'package:share_location/screens/login_screen.dart';
 import 'package:share_location/screens/main_screen.dart';
+import 'package:share_location/screens/timeline_screen.dart';
 import 'package:share_location/screens/welcome_screen.dart';
 import 'package:supabase_flutter/supabase_flutter.dart';
 
@@ -58,6 +59,7 @@ class MyApp extends StatelessWidget {
         WelcomeScreen.ID: (context) => const WelcomeScreen(),
         MainScreen.ID: (context) => const MainScreen(),
         LoginScreen.ID: (context) => const LoginScreen(),
+        TimelineScreen.ID: (context) => const TimelineScreen(),
       },
       initialRoute: initialPage,
     );

lib/managers/file_manager.dart

@@ -1,4 +1,5 @@
 import 'dart:io';
+import 'dart:typed_data';
 
 import 'package:share_location/enums.dart';
 import 'package:supabase_flutter/supabase_flutter.dart';
@@ -9,6 +10,8 @@ const uuid = Uuid();
 final supabase = Supabase.instance.client;
 
 class FileManager {
+  static Map<String, Uint8List> fileCache = {};
+
   static Future<User> getUser(final String userID) async {
     final response = await supabase
         .from('users')
@@ -68,4 +71,27 @@ class FileManager {
 
     return [file.data!, memoryType];
   }
+
+  static Future<Uint8List> downloadFile(
+    final String table,
+    final String path,
+  ) async {
+    final key = '$table:$path';
+
+    if (fileCache.containsKey(key)) {
+      return fileCache[key]!;
+    }
+
+    final response = await supabase.storage.from(table).download(path);
+
+    if (response.error != null) {
+      throw Exception('Error downloading file: ${response.error!.message}');
+    }
+
+    final data = response.data!;
+
+    fileCache[key] = data;
+
+    return data;
+  }
 }

lib/screens/timeline_screen.dart

@@ -0,0 +1,13 @@
+import 'package:flutter/material.dart';
+import 'package:share_location/widgets/timeline_scroll.dart';
+
+class TimelineScreen extends StatelessWidget {
+  static const ID = 'timeline';
+
+  const TimelineScreen({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return TimelineScroll();
+  }
+}

lib/widgets/memory.dart

@@ -0,0 +1,139 @@
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:share_location/constants/spacing.dart';
+import 'package:share_location/enums.dart';
+import 'package:share_location/managers/file_manager.dart';
+import 'package:share_location/utils/auth_required.dart';
+import 'package:share_location/widgets/raw_memory_display.dart';
+import 'package:supabase_flutter/supabase_flutter.dart';
+
+enum MemoryFetchStatus {
+  preparing,
+  loadingMetadata,
+  downloading,
+  error,
+  done,
+}
+
+class Memory extends StatefulWidget {
+  final String location;
+  final DateTime creationDate;
+
+  const Memory({
+    Key? key,
+    required this.location,
+    required this.creationDate,
+  }) : super(key: key);
+
+  @override
+  State<Memory> createState() => _MemoryState();
+}
+
+class _MemoryState extends AuthRequiredState<Memory> {
+  late final User _user;
+  MemoryFetchStatus status = MemoryFetchStatus.preparing;
+  Uint8List? data;
+  MemoryType? type;
+
+  @override
+  void initState() {
+    super.initState();
+
+    loadMemoryFile();
+  }
+
+  @override
+  void onAuthenticated(Session session) {
+    final user = session.user;
+
+    if (user != null) {
+      _user = user;
+    }
+  }
+
+  Future<void> loadMemoryFile() async {
+    final filename = widget.location.split('/').last;
+
+    setState(() {
+      status = MemoryFetchStatus.loadingMetadata;
+    });
+
+    final response = await supabase
+        .from('memories')
+        .select()
+        .eq('location', '${_user.id}/$filename')
+        .limit(1)
+        .single()
+        .execute();
+
+    if (response.data == null) {
+      setState(() {
+        status = MemoryFetchStatus.error;
+      });
+      return;
+    }
+
+    setState(() {
+      status = MemoryFetchStatus.downloading;
+    });
+
+    final memory = response.data;
+    final location = memory['location'];
+    final memoryType =
+        location.split('.').last == 'jpg' ? MemoryType.photo : MemoryType.video;
+
+    try {
+      final fileData = await FileManager.downloadFile('memories', location);
+
+      setState(() {
+        status = MemoryFetchStatus.done;
+        data = fileData;
+        type = memoryType;
+      });
+    } catch (error) {
+      setState(() {
+        status = MemoryFetchStatus.error;
+      });
+      return;
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (status == MemoryFetchStatus.error) {
+      return const Center(
+        child: Text('Memory could not be loaded.'),
+      );
+    }
+
+    if (status == MemoryFetchStatus.done) {
+      return RawMemoryDisplay(
+        data: data!,
+        type: type!,
+      );
+    }
+
+    return Column(
+      mainAxisAlignment: MainAxisAlignment.center,
+      crossAxisAlignment: CrossAxisAlignment.center,
+      children: <Widget>[
+        const CircularProgressIndicator(),
+        const SizedBox(height: SMALL_SPACE),
+        () {
+          switch (status) {
+            // ADD dot loading text
+            case MemoryFetchStatus.preparing:
+              return const Text('Preparing to download memory');
+            case MemoryFetchStatus.loadingMetadata:
+              return const Text('Loading memory metadata');
+            case MemoryFetchStatus.downloading:
+              return const Text('Downloading memory');
+            default:
+              return const SizedBox();
+          }
+        }(),
+      ],
+    );
+  }
+}

lib/widgets/raw_memory_display.dart

@@ -0,0 +1,92 @@
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:share_location/enums.dart';
+import 'package:video_player/video_player.dart';
+
+class RawMemoryDisplay extends StatefulWidget {
+  final Uint8List data;
+  final MemoryType type;
+  final String? filename;
+
+  const RawMemoryDisplay({
+    Key? key,
+    required this.data,
+    required this.type,
+    this.filename,
+  }) : super(key: key);
+
+  @override
+  State<RawMemoryDisplay> createState() => _RawMemoryDisplayState();
+}
+
+class _RawMemoryDisplayState extends State<RawMemoryDisplay> {
+  VideoPlayerController? videoController;
+
+  @override
+  void initState() {
+    super.initState();
+
+    if (widget.type == MemoryType.video) {
+      initializeVideo();
+    }
+  }
+
+  Future<File> createTempVideo() async {
+    final tempDirectory = await getTemporaryDirectory();
+    final path = '${tempDirectory.path}/${widget.filename ?? 'video.mp4'}';
+
+    if (widget.filename != null) {
+      // File already exists, so just return the path
+      return File(path);
+    }
+
+    // File needs to be created
+    final file = await File(path).create();
+    await file.writeAsBytes(widget.data);
+
+    return file;
+  }
+
+  Future<void> initializeVideo() async {
+    final file = await createTempVideo();
+
+    videoController = VideoPlayerController.file(file);
+    videoController!.initialize().then((value) {
+      setState(() {});
+      videoController!.setLooping(true);
+      videoController!.play();
+    });
+  }
+
+  @override
+  void dispose() {
+    videoController?.dispose();
+
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    switch (widget.type) {
+      case MemoryType.photo:
+        return Image.memory(
+          widget.data,
+          fit: BoxFit.cover,
+        );
+      case MemoryType.video:
+        if (videoController == null) {
+          return const SizedBox();
+        }
+
+        return AspectRatio(
+          aspectRatio: videoController!.value.aspectRatio,
+          child: VideoPlayer(videoController!),
+        );
+      default:
+        throw Exception('Unknown memory type: ${widget.type}');
+    }
+  }
+}

lib/widgets/timeline_scroll.dart

@@ -0,0 +1,63 @@
+import 'package:flutter/material.dart';
+import 'package:share_location/utils/loadable.dart';
+import 'package:share_location/widgets/memory.dart';
+import 'package:supabase_flutter/supabase_flutter.dart';
+
+final supabase = Supabase.instance.client;
+
+class TimelineScroll extends StatefulWidget {
+  TimelineScroll({
+    Key? key,
+  }) : super(key: key);
+
+  @override
+  State<TimelineScroll> createState() => _TimelineScrollState();
+}
+
+class _TimelineScrollState extends State<TimelineScroll> with Loadable {
+  final pageController = PageController();
+  dynamic timeline;
+
+  @override
+  initState() {
+    super.initState();
+    loadTimeline();
+  }
+
+  Future<void> loadTimeline() async {
+    final response = await supabase
+        .from('memories')
+        .select()
+        .order('created_at', ascending: false)
+        .execute();
+
+    setState(() {
+      timeline = response.data;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (timeline == null) {
+      return const Center(
+        child: CircularProgressIndicator(),
+      );
+    }
+
+    return Scaffold(
+      body: PageView.builder(
+        controller: pageController,
+        scrollDirection: Axis.vertical,
+        itemCount: timeline.length,
+        itemBuilder: (_, index) => Container(
+          width: MediaQuery.of(context).size.width,
+          height: MediaQuery.of(context).size.height,
+          child: Memory(
+            location: timeline[index]['location'],
+            creationDate: DateTime.parse(timeline[index]['created_at']),
+          ),
+        ),
+      ),
+    );
+  }
+}

lib/widgets/today_photo_button.dart

@@ -1,13 +1,13 @@
-import 'dart:io';
 import 'dart:typed_data';
 
 import 'package:flutter/material.dart';
-import 'package:path_provider/path_provider.dart';
 import 'package:share_location/constants/spacing.dart';
 import 'package:share_location/enums.dart';
-import 'package:video_player/video_player.dart';
+import 'package:share_location/screens/timeline_screen.dart';
 
-class TodayPhotoButton extends StatefulWidget {
+import 'raw_memory_display.dart';
+
+class TodayPhotoButton extends StatelessWidget {
   final Uint8List? data;
   final MemoryType? type;
 
@@ -17,45 +17,12 @@ class TodayPhotoButton extends StatefulWidget {
     this.type,
   }) : super(key: key);
 
-  @override
-  State<TodayPhotoButton> createState() => _TodayPhotoButtonState();
-}
-
-class _TodayPhotoButtonState extends State<TodayPhotoButton> {
-  VideoPlayerController? videoController;
-
-  @override
-  void initState() {
-    super.initState();
-
-    if (widget.type == MemoryType.video) {
-      initializeVideo();
-    }
-  }
-
-  Future<void> initializeVideo() async {
-    final tempDir = await getTemporaryDirectory();
-    final file = await File('${tempDir.path}/video.mp4').create();
-    file.writeAsBytesSync(widget.data!);
-
-    videoController = VideoPlayerController.file(file);
-    videoController!.initialize().then((value) {
-      setState(() {});
-      videoController!.setLooping(true);
-      videoController!.play();
-    });
-  }
-
-  @override
-  void dispose() {
-    videoController?.dispose();
-
-    super.dispose();
-  }
-
   @override
   Widget build(BuildContext context) {
     return InkWell(
+      onTap: () {
+        Navigator.pushNamed(context, TimelineScreen.ID);
+      },
       child: Container(
         width: 45,
         height: 45,
@@ -68,31 +35,14 @@ class _TodayPhotoButtonState extends State<TodayPhotoButton> {
           color: Colors.grey,
         ),
         child: ClipRRect(
-            borderRadius: BorderRadius.circular(SMALL_SPACE),
-            child: () {
-              if (widget.data == null) {
-                return SizedBox();
-              }
-
-              switch (widget.type) {
-                case MemoryType.photo:
-                  return Image.memory(
-                    widget.data as Uint8List,
-                    fit: BoxFit.cover,
-                  );
-                case MemoryType.video:
-                  if (videoController == null) {
-                    return const SizedBox();
-                  }
-
-                  return AspectRatio(
-                    aspectRatio: videoController!.value.aspectRatio,
-                    child: VideoPlayer(videoController!),
-                  );
-                default:
-                  return const SizedBox();
-              }
-            }()),
+          borderRadius: BorderRadius.circular(SMALL_SPACE),
+          child: (data == null || type == null)
+              ? const SizedBox()
+              : RawMemoryDisplay(
+                  data: data!,
+                  type: type!,
+                ),
+        ),
       ),
     );
   }