improved memory handling

lib/controllers/memory_slide_controller.dart

@@ -19,6 +19,8 @@ class MemorySlideController extends PropertyChangeNotifier<String> {
   int get index => _index;
   bool get completed => _completed;
 
+  bool get isLast => _index == memoryLength - 1;
+
   void setPaused(bool paused) {
     _paused = paused;
     notifyListeners('paused');
@@ -30,7 +32,7 @@ class MemorySlideController extends PropertyChangeNotifier<String> {
   }
 
   void next() {
-    if (_index == memoryLength - 1) {
+    if (isLast) {
       _completed = true;
       notifyListeners('completed');
     } else {

lib/managers/file_manager.dart

@@ -95,4 +95,20 @@ class FileManager {
 
     return data;
   }
+
+  static Future<void> deleteFile(final String path) async {
+    final response =
+        await supabase.from('memories').delete().eq('location', path).execute();
+
+    if (response.error != null) {
+      throw Exception('Error deleting file: ${response.error!.message}');
+    }
+
+    final storageResponse =
+        await supabase.storage.from('memories').remove([path]);
+
+    if (storageResponse.error != null) {
+      throw Exception('Error deleting file: ${storageResponse.error!.message}');
+    }
+  }
 }

lib/models/memory_pack.dart

@@ -0,0 +1,61 @@
+import 'dart:math';
+
+import 'package:property_change_notifier/property_change_notifier.dart';
+import 'package:share_location/foreign_types/memory.dart';
+
+class MemoryPack extends PropertyChangeNotifier<String> {
+  final List<Memory> _memories;
+  int _currentMemoryIndex = 0;
+  bool _paused = false;
+  bool _completed = false;
+
+  MemoryPack(this._memories);
+
+  List<Memory> get memories => [..._memories];
+  int get currentMemoryIndex => _currentMemoryIndex;
+  Memory get currentMemory => _memories[_currentMemoryIndex];
+  bool get paused => _paused;
+  bool get completed => _completed;
+  bool get isLast => _currentMemoryIndex == _memories.length - 1;
+
+  void setPaused(bool paused) {
+    _paused = paused;
+    notifyListeners('paused');
+  }
+
+  void next() {
+    if (isLast) {
+      _completed = true;
+      notifyListeners('completed');
+    } else {
+      _paused = false;
+      _completed = false;
+      _currentMemoryIndex++;
+      notifyListeners();
+    }
+  }
+
+  void previous() {
+    _currentMemoryIndex = max(_currentMemoryIndex - 1, 0);
+    _paused = false;
+    _completed = false;
+    notifyListeners();
+  }
+
+  void reset() {
+    _completed = false;
+    _paused = false;
+    _currentMemoryIndex = 0;
+    notifyListeners();
+  }
+
+  void removeMemory(int index) {
+    _memories.removeAt(index);
+    notifyListeners();
+  }
+
+  void removeCurrentMemory() => removeMemory(_currentMemoryIndex);
+
+  void pause() => setPaused(true);
+  void resume() => setPaused(false);
+}

lib/models/timeline_overlay.dart

@@ -1,15 +1,35 @@
-import 'package:flutter/material.dart';
+import 'package:property_change_notifier/property_change_notifier.dart';
 
-class TimelineOverlay extends ChangeNotifier {
+enum TimelineState {
+  loading,
+  paused,
+  playing,
+  completed,
+}
+
+class TimelineOverlay extends PropertyChangeNotifier<String> {
   bool _showOverlay = true;
+  TimelineState _state = TimelineState.loading;
 
   bool get showOverlay => _showOverlay;
+  TimelineState get state => _state;
 
   void hideOverlay() => setShowOverlay(false);
   void restoreOverlay() => setShowOverlay(true);
 
   void setShowOverlay(bool showOverlay) {
     _showOverlay = showOverlay;
+    notifyListeners('showOverlay');
+  }
+
+  void setState(TimelineState state) {
+    _state = state;
+    notifyListeners('state');
+  }
+
+  void reset() {
+    _showOverlay = true;
+    _state = TimelineState.loading;
     notifyListeners();
   }
 }

lib/widgets/memory_sheet.dart

@@ -0,0 +1,53 @@
+import 'package:flutter/material.dart';
+import 'package:share_location/constants/spacing.dart';
+import 'package:share_location/foreign_types/memory.dart';
+import 'package:share_location/managers/file_manager.dart';
+import 'package:share_location/utils/loadable.dart';
+import 'package:share_location/widgets/modal_sheet.dart';
+
+class MemorySheet extends StatefulWidget {
+  final Memory memory;
+
+  const MemorySheet({
+    Key? key,
+    required this.memory,
+  }) : super(key: key);
+
+  @override
+  State<MemorySheet> createState() => _MemorySheetState();
+}
+
+class _MemorySheetState extends State<MemorySheet> with Loadable {
+  Future<void> deleteFile() => FileManager.deleteFile(widget.memory.location);
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+
+    return ModalSheet(
+      child: Column(
+        children: <Widget>[
+          Text(
+            'Edit Memory',
+            style: theme.textTheme.headline1,
+          ),
+          const SizedBox(height: MEDIUM_SPACE),
+          ListTile(
+            leading: Icon(Icons.delete_forever_sharp),
+            title: Text('Delete Memory'),
+            onTap: isLoading
+                ? null
+                : () async {
+                    await callWithLoading(deleteFile);
+
+                    if (mounted) {
+                      Navigator.pop(context);
+                    }
+                  },
+            trailing: isLoading ? const CircularProgressIndicator() : null,
+          ),
+        ],
+      ),
+    );
+  }
+}

lib/widgets/memory_slide.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import 'package:share_location/controllers/memory_slide_controller.dart';
 import 'package:share_location/controllers/status_controller.dart';
 import 'package:share_location/enums.dart';
 import 'package:share_location/foreign_types/memory.dart';
@@ -14,12 +13,10 @@ const DEFAULT_IMAGE_DURATION = Duration(seconds: 5);
 
 class MemorySlide extends StatefulWidget {
   final Memory memory;
-  final MemorySlideController controller;
 
   const MemorySlide({
     Key? key,
     required this.memory,
-    required this.controller,
   }) : super(key: key);
 
   @override
@@ -36,15 +33,19 @@ class _MemorySlideState extends State<MemorySlide>
   void initState() {
     super.initState();
 
-    widget.controller.addListener(() {
+    final timelineOverlay = context.read<TimelineOverlay>();
+
+    timelineOverlay.addListener(() {
       if (!mounted) {
         return;
       }
 
-      if (widget.controller.paused) {
-        controller?.stop();
-      } else {
-        controller?.start();
+      switch (timelineOverlay.state) {
+        case TimelineState.playing:
+          controller?.start();
+          break;
+        default:
+          controller?.stop();
       }
     });
   }
@@ -57,11 +58,23 @@ class _MemorySlideState extends State<MemorySlide>
   }
 
   void initializeAnimation(final Duration duration) {
+    final timelineOverlay = context.read<TimelineOverlay>();
+
     this.duration = duration;
 
     controller = StatusController(
       duration: duration,
-    )..addListener(widget.controller.setDone, ['done']);
+    );
+
+    controller!.addListener(() {
+      if (!mounted) {
+        return;
+      }
+
+      if (controller!.done) {
+        timelineOverlay.setState(TimelineState.completed);
+      }
+    }, ['done']);
 
     setState(() {});
   }
@@ -86,17 +99,17 @@ class _MemorySlideState extends State<MemorySlide>
             if (mounted) {
               initializeAnimation(controller.value.duration);
 
-              widget.controller.addListener(() {
+              overlayController.addListener(() {
                 if (!mounted) {
                   return;
                 }
 
-                if (widget.controller.paused) {
-                  controller.pause();
-                } else {
+                if (overlayController.state == TimelineState.playing) {
                   controller.play();
+                } else {
+                  controller.pause();
                 }
-              });
+              }, ['state']);
             }
           },
         ),

lib/widgets/modal_sheet.dart

@@ -0,0 +1,39 @@
+import 'package:flutter/material.dart';
+import 'package:share_location/constants/spacing.dart';
+
+class ModalSheet extends StatelessWidget {
+  final Widget child;
+
+  const ModalSheet({
+    Key? key,
+    required this.child,
+  }) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+
+    return Wrap(
+      crossAxisAlignment: WrapCrossAlignment.center,
+      children: <Widget>[
+        Padding(
+          padding:
+              EdgeInsets.only(bottom: MediaQuery.of(context).viewInsets.bottom),
+          child: Container(
+            width: double.infinity,
+            padding: const EdgeInsets.all(MEDIUM_SPACE),
+            decoration: BoxDecoration(
+              color: theme.bottomSheetTheme.modalBackgroundColor ??
+                  theme.bottomAppBarColor,
+              borderRadius: const BorderRadius.only(
+                topLeft: Radius.circular(LARGE_SPACE),
+                topRight: Radius.circular(LARGE_SPACE),
+              ),
+            ),
+            child: child,
+          ),
+        ),
+      ],
+    );
+  }
+}

lib/widgets/timeline_page.dart

@@ -4,21 +4,19 @@ import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
 import 'package:provider/provider.dart';
 import 'package:share_location/constants/spacing.dart';
-import 'package:share_location/controllers/memory_slide_controller.dart';
-import 'package:share_location/foreign_types/memory.dart';
+import 'package:share_location/models/memory_pack.dart';
 import 'package:share_location/models/timeline_overlay.dart';
+import 'package:share_location/widgets/memory_sheet.dart';
 import 'package:share_location/widgets/memory_slide.dart';
 
 class TimelinePage extends StatefulWidget {
   final DateTime date;
-  final List<Memory> memories;
   final VoidCallback onPreviousTimeline;
   final VoidCallback onNextTimeline;
 
   const TimelinePage({
     Key? key,
     required this.date,
-    required this.memories,
     required this.onPreviousTimeline,
     required this.onNextTimeline,
   }) : super(key: key);
@@ -30,7 +28,6 @@ class TimelinePage extends StatefulWidget {
 class _TimelinePageState extends State<TimelinePage> {
   final timelineOverlayController = TimelineOverlay();
   final pageController = PageController();
-  late final MemorySlideController controller;
 
   Timer? overlayRemover;
 
@@ -38,37 +35,75 @@ class _TimelinePageState extends State<TimelinePage> {
   void initState() {
     super.initState();
 
-    controller = MemorySlideController(memoryLength: widget.memories.length);
-    controller.addListener(() {
-      if (controller.done) {
-        controller.next();
+    final memoryPack = context.read<MemoryPack>();
 
-        pageController.nextPage(
-          duration: const Duration(milliseconds: 200),
-          curve: Curves.linearToEaseOut,
-        );
+    timelineOverlayController.addListener(() {
+      if (!mounted) {
+        return;
       }
-    }, ['done']);
-    controller.addListener(() {
-      if (controller.completed) {
+
+      if (timelineOverlayController.state == TimelineState.completed) {
+        timelineOverlayController.reset();
+        memoryPack.next();
+      }
+    }, ['state']);
+
+    memoryPack.addListener(() {
+      if (!mounted) {
+        return;
+      }
+
+      if (memoryPack.completed) {
         widget.onNextTimeline();
+        memoryPack.reset();
       }
     }, ['completed']);
-  }
 
-  @override
-  void dispose() {
-    controller.dispose();
-    timelineOverlayController.dispose();
+    memoryPack.addListener(() {
+      if (!mounted) {
+        return;
+      }
 
-    super.dispose();
+      if (memoryPack.currentMemoryIndex != pageController.page) {
+        pageController.animateToPage(
+          memoryPack.currentMemoryIndex,
+          duration: const Duration(milliseconds: 300),
+          curve: Curves.easeOutQuad,
+        );
+      }
+    });
   }
 
   @override
   Widget build(BuildContext context) {
     return GestureDetector(
+      onDoubleTap: () async {
+        final memoryPack = context.read<MemoryPack>();
+
+        memoryPack.pause();
+        timelineOverlayController.hideOverlay();
+
+        await showModalBottomSheet(
+          context: context,
+          backgroundColor: Colors.transparent,
+          isScrollControlled: true,
+          builder: (_) => MemorySheet(
+            memory: memoryPack.currentMemory,
+          ),
+        );
+
+        if (!mounted) {
+          return;
+        }
+
+        memoryPack.removeCurrentMemory();
+        memoryPack.resume();
+        timelineOverlayController.restoreOverlay();
+      },
       onTapDown: (_) {
-        controller.setPaused(true);
+        final memoryPack = context.read<MemoryPack>();
+
+        memoryPack.pause();
 
         overlayRemover = Timer(
           const Duration(milliseconds: 200),
@@ -76,28 +111,32 @@ class _TimelinePageState extends State<TimelinePage> {
         );
       },
       onTapUp: (_) {
+        final memoryPack = context.read<MemoryPack>();
+
         overlayRemover?.cancel();
-
-        controller.setPaused(false);
-
+        memoryPack.resume();
         timelineOverlayController.restoreOverlay();
       },
       onTapCancel: () {
+        final memoryPack = context.read<MemoryPack>();
+
         overlayRemover?.cancel();
 
         timelineOverlayController.restoreOverlay();
-        controller.setPaused(false);
+        memoryPack.resume();
       },
       onHorizontalDragEnd: (details) {
+        final memoryPack = context.read<MemoryPack>();
+
         if (details.primaryVelocity! < 0) {
-          controller.next();
+          memoryPack.next();
 
           pageController.nextPage(
             duration: const Duration(milliseconds: 200),
             curve: Curves.linearToEaseOut,
           );
         } else if (details.primaryVelocity! > 0) {
-          controller.previous();
+          memoryPack.previous();
 
           pageController.previousPage(
             duration: const Duration(milliseconds: 200),
@@ -110,16 +149,19 @@ class _TimelinePageState extends State<TimelinePage> {
         child: Stack(
           fit: StackFit.expand,
           children: <Widget>[
-            PageView.builder(
-              controller: pageController,
-              physics: const NeverScrollableScrollPhysics(),
-              scrollDirection: Axis.horizontal,
-              itemBuilder: (_, __) => MemorySlide(
-                key: Key(controller.index.toString()),
-                controller: controller,
-                memory: widget.memories[controller.index],
-              ),
-              itemCount: widget.memories.length,
+            Consumer<MemoryPack>(
+              builder: (_, memoryPack, __) {
+                return PageView.builder(
+                  controller: pageController,
+                  physics: const NeverScrollableScrollPhysics(),
+                  scrollDirection: Axis.horizontal,
+                  itemBuilder: (_, index) => MemorySlide(
+                    key: Key(memoryPack.memories[index].filename),
+                    memory: memoryPack.memories[index],
+                  ),
+                  itemCount: memoryPack.memories.length,
+                );
+              },
             ),
             Padding(
               padding: const EdgeInsets.only(

lib/widgets/timeline_scroll.dart

@@ -1,6 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
+import 'package:provider/provider.dart';
 import 'package:share_location/foreign_types/memory.dart';
+import 'package:share_location/models/memory_pack.dart';
 import 'package:share_location/utils/loadable.dart';
 import 'package:share_location/widgets/timeline_page.dart';
 import 'package:supabase_flutter/supabase_flutter.dart';
@@ -18,7 +20,7 @@ class TimelineScroll extends StatefulWidget {
 
 class _TimelineScrollState extends State<TimelineScroll> with Loadable {
   final pageController = PageController();
-  dynamic timeline;
+  Map<String, MemoryPack>? timeline;
 
   @override
   initState() {
@@ -41,7 +43,7 @@ class _TimelineScrollState extends State<TimelineScroll> with Loadable {
     });
   }
 
-  static Map<String, List<Memory>> convertMemoriesToTimeline(
+  static Map<String, MemoryPack> convertMemoriesToTimeline(
     final List<Memory> memories,
   ) {
     final map = <String, List<Memory>>{};
@@ -55,7 +57,14 @@ class _TimelineScrollState extends State<TimelineScroll> with Loadable {
       }
     }
 
-    return map;
+    return Map.fromEntries(
+      map.entries.map(
+        (entry) => MapEntry<String, MemoryPack>(
+          entry.key,
+          MemoryPack(entry.value),
+        ),
+      ),
+    );
   }
 
   @override
@@ -70,22 +79,24 @@ class _TimelineScrollState extends State<TimelineScroll> with Loadable {
       body: PageView.builder(
         controller: pageController,
         scrollDirection: Axis.vertical,
-        itemCount: timeline.length,
-        itemBuilder: (_, index) => TimelinePage(
-          date: DateTime.parse(timeline.keys.toList()[index]),
-          memories: timeline.values.toList()[index],
-          onNextTimeline: () {
-            pageController.nextPage(
-              duration: const Duration(milliseconds: 500),
-              curve: Curves.ease,
-            );
-          },
-          onPreviousTimeline: () {
-            pageController.previousPage(
-              duration: const Duration(milliseconds: 500),
-              curve: Curves.ease,
-            );
-          },
+        itemCount: timeline!.length,
+        itemBuilder: (_, index) => ChangeNotifierProvider<MemoryPack>(
+          create: (_) => timeline!.values.elementAt(index),
+          child: TimelinePage(
+            date: DateTime.parse(timeline!.keys.toList()[index]),
+            onNextTimeline: () {
+              pageController.nextPage(
+                duration: const Duration(milliseconds: 500),
+                curve: Curves.ease,
+              );
+            },
+            onPreviousTimeline: () {
+              pageController.previousPage(
+                duration: const Duration(milliseconds: 500),
+                curve: Curves.ease,
+              );
+            },
+          ),
         ),
       ),
     );