added download functionality

lib/extensions/snackbar.dart

@@ -12,11 +12,12 @@ extension ShowSnackBar on BuildContext {
     required final String message,
     final Color backgroundColor = Colors.white,
     final Duration duration = const Duration(seconds: 4),
+    final BuildContext? context,
   }) {
     pendingSnackBar?.close();
     pendingSnackBar = null;
 
-    return ScaffoldMessenger.of(this).showSnackBar(
+    return ScaffoldMessenger.of(context ?? this).showSnackBar(
       SnackBar(
         content: Text(message),
         backgroundColor: backgroundColor,
@@ -25,14 +26,20 @@ extension ShowSnackBar on BuildContext {
     );
   }
 
-  void showErrorSnackBar({required final String message}) {
+  void showErrorSnackBar({
+    required final String message,
+    final BuildContext? context,
+  }) {
     showSnackBar(
       message: message,
       backgroundColor: Colors.red,
     );
   }
 
-  void showSuccessSnackBar({required final String message}) {
+  void showSuccessSnackBar({
+    required final String message,
+    final BuildContext? context,
+  }) {
     showSnackBar(
       message: message,
       duration: const Duration(milliseconds: 550),
@@ -40,7 +47,10 @@ extension ShowSnackBar on BuildContext {
     );
   }
 
-  void showPendingSnackBar({required final String message}) {
+  void showPendingSnackBar({
+    required final String message,
+    final BuildContext? context,
+  }) {
     pendingSnackBar = showSnackBar(
       message: message,
       backgroundColor: Colors.yellow,

lib/managers/file_manager.dart

@@ -1,6 +1,7 @@
 import 'dart:io';
 import 'dart:typed_data';
 
+import 'package:path_provider/path_provider.dart';
 import 'package:share_location/enums.dart';
 import 'package:supabase_flutter/supabase_flutter.dart';
 import 'package:uuid/uuid.dart';
@@ -65,7 +66,7 @@ class FileManager {
         location.split('.').last == 'jpg' ? MemoryType.photo : MemoryType.video;
 
     try {
-      final file = await downloadFile('memories', location);
+      final file = await getFileData('memories', location);
 
       return [file, memoryType];
     } catch (error) {
@@ -73,13 +74,11 @@ class FileManager {
     }
   }
 
-  static Future<Uint8List> downloadFile(
-    final String table,
-    final String path,
-  ) async {
+  static Future<Uint8List> getFileData(final String table, final String path,
+      {final bool disableCache = false}) async {
     final key = '$table:$path';
 
-    if (fileCache.containsKey(key)) {
+    if (!disableCache && fileCache.containsKey(key)) {
       return fileCache[key]!;
     }
 
@@ -96,6 +95,30 @@ class FileManager {
     return data;
   }
 
+  static Future<File> downloadFile(
+    final String table,
+    final String path, {
+    final bool disableDownloadCache = false,
+    final bool disableFileCache = false,
+  }) async {
+    final tempDirectory = await getTemporaryDirectory();
+    final filename = '${tempDirectory.path}/$path';
+    final file = File(filename);
+
+    if (!disableFileCache && (await file.exists())) {
+      return file;
+    }
+
+    final data =
+        await getFileData(table, path, disableCache: disableDownloadCache);
+
+    // Create file
+    await file.create(recursive: true);
+    await file.writeAsBytes(data);
+
+    return file;
+  }
+
   static Future<void> deleteFile(final String path) async {
     final response =
         await supabase.from('memories').delete().eq('location', path).execute();

lib/utils/loadable.dart

@@ -1,20 +1,31 @@
-mixin Loadable {
-  bool _isLoading = false;
+import 'package:uuid/uuid.dart';
 
-  bool get isLoading => _isLoading;
+const uuid = Uuid();
+
+mixin Loadable {
+  static final String _generalLoadingID = '#_loadable-${uuid.v4()}';
+
+  final Set<String> _IDs = <String>{};
+
+  bool get isLoading => _IDs.contains(_generalLoadingID);
+  bool getIsLoadingSpecificID(final String id) => _IDs.contains(id);
+  bool getIsLoading(final String id) => isLoading || getIsLoadingSpecificID(id);
 
   void setState(void Function() callback);
 
-  Future<void> callWithLoading(Future<void> Function() callback) async {
+  Future<void> callWithLoading(
+    Future<void> Function() callback, [
+    final String? id,
+  ]) async {
     setState(() {
-      _isLoading = true;
+      _IDs.add(id ?? _generalLoadingID);
     });
 
     try {
       await callback();
     } finally {
       setState(() {
-        _isLoading = false;
+        _IDs.remove(id ?? _generalLoadingID);
       });
     }
   }

lib/widgets/memory.dart

@@ -98,7 +98,7 @@ class _MemoryViewState extends AuthRequiredState<MemoryView> {
         location.split('.').last == 'jpg' ? MemoryType.photo : MemoryType.video;
 
     try {
-      final fileData = await FileManager.downloadFile('memories', location);
+      final fileData = await FileManager.getFileData('memories', location);
 
       if (!mounted) {
         return;

lib/widgets/memory_sheet.dart

@@ -1,5 +1,9 @@
 import 'package:flutter/material.dart';
+import 'package:fluttertoast/fluttertoast.dart';
+import 'package:gallery_saver/gallery_saver.dart';
 import 'package:share_location/constants/spacing.dart';
+import 'package:share_location/enums.dart';
+import 'package:share_location/extensions/snackbar.dart';
 import 'package:share_location/foreign_types/memory.dart';
 import 'package:share_location/managers/file_manager.dart';
 import 'package:share_location/utils/loadable.dart';
@@ -8,11 +12,13 @@ import 'package:share_location/widgets/modal_sheet.dart';
 class MemorySheet extends StatefulWidget {
   final Memory memory;
   final VoidCallback onMemoryDeleted;
+  final BuildContext sheetContext;
 
   const MemorySheet({
     Key? key,
     required this.memory,
     required this.onMemoryDeleted,
+    required this.sheetContext,
   }) : super(key: key);
 
   @override
@@ -23,6 +29,55 @@ class _MemorySheetState extends State<MemorySheet> with Loadable {
   Future<void> deleteFile() async {
     await FileManager.deleteFile(widget.memory.location);
     widget.onMemoryDeleted();
+
+    if (mounted) {
+      Navigator.pop(context);
+    }
+  }
+
+  Future<void> downloadFile() async {
+    try {
+      final file =
+          await FileManager.downloadFile('memories', widget.memory.location);
+
+      if (!mounted) {
+        return;
+      }
+
+      switch (widget.memory.type) {
+        case MemoryType.photo:
+          await GallerySaver.saveImage(file.path);
+          break;
+        case MemoryType.video:
+          await GallerySaver.saveVideo(file.path);
+          break;
+      }
+
+      Navigator.pop(context);
+
+      context.showSuccessSnackBar(message: 'File saved to Gallery!');
+    } catch (error) {
+      context.showErrorSnackBar(message: 'There was an error');
+      Fluttertoast.showToast(
+        msg: 'There was an error',
+        toastLength: Toast.LENGTH_SHORT,
+        backgroundColor: Colors.red,
+        textColor: Colors.white,
+      );
+    }
+  }
+
+  Widget buildLoadingIndicator() {
+    final theme = Theme.of(context);
+
+    return SizedBox(
+      width: theme.textTheme.titleLarge!.fontSize,
+      height: theme.textTheme.titleLarge!.fontSize,
+      child: CircularProgressIndicator(
+        strokeWidth: 2,
+        color: theme.textTheme.bodyText1!.color,
+      ),
+    );
   }
 
   @override
@@ -38,18 +93,26 @@ class _MemorySheetState extends State<MemorySheet> with Loadable {
           ),
           const SizedBox(height: MEDIUM_SPACE),
           ListTile(
-            leading: Icon(Icons.delete_forever_sharp),
-            title: Text('Delete Memory'),
-            onTap: isLoading
+            leading: const Icon(Icons.download),
+            title: const Text('Download to Gallery'),
+            enabled: !getIsLoadingSpecificID('download'),
+            onTap: getIsLoadingSpecificID('download')
                 ? null
-                : () async {
-                    await callWithLoading(deleteFile);
-
-                    if (mounted) {
-                      Navigator.pop(context);
-                    }
-                  },
-            trailing: isLoading ? const CircularProgressIndicator() : null,
+                : () => callWithLoading(downloadFile, 'download'),
+            trailing: getIsLoadingSpecificID('download')
+                ? buildLoadingIndicator()
+                : null,
+          ),
+          ListTile(
+            leading: const Icon(Icons.delete_forever_sharp),
+            title: const Text('Delete Memory'),
+            enabled: !getIsLoadingSpecificID('delete'),
+            onTap: getIsLoadingSpecificID('delete')
+                ? null
+                : () => callWithLoading(deleteFile, 'delete'),
+            trailing: getIsLoadingSpecificID('delete')
+                ? buildLoadingIndicator()
+                : null,
           ),
         ],
       ),

lib/widgets/modal_sheet.dart

@@ -19,20 +19,19 @@ class ModalSheet extends StatelessWidget {
         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,
+          child: Material(
             borderRadius: const BorderRadius.only(
               topLeft: Radius.circular(LARGE_SPACE),
               topRight: Radius.circular(LARGE_SPACE),
             ),
-            ),
+            color: theme.bottomSheetTheme.modalBackgroundColor ??
+                theme.bottomAppBarColor,
+            child: Container(
+              padding: const EdgeInsets.all(MEDIUM_SPACE),
               child: child,
             ),
           ),
+        ),
       ],
     );
   }

lib/widgets/timeline_page.dart

@@ -119,8 +119,9 @@ class _TimelinePageState extends State<TimelinePage> {
           context: context,
           backgroundColor: Colors.transparent,
           isScrollControlled: true,
-          builder: (_) => MemorySheet(
+          builder: (sheetContext) => MemorySheet(
             memory: timeline.currentMemory,
+            sheetContext: sheetContext,
             onMemoryDeleted: timeline.removeEmptyDates,
           ),
         );

pubspec.lock

@@ -205,6 +205,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  fluttertoast:
+    dependency: "direct main"
+    description:
+      name: fluttertoast
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "8.0.9"
   functions_client:
     dependency: transitive
     description:
@@ -212,6 +219,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.0.1-dev.5"
+  gallery_saver:
+    dependency: "direct main"
+    description:
+      name: gallery_saver
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.2"
   gotrue:
     dependency: transitive
     description:

pubspec.yaml

@@ -46,6 +46,8 @@ dependencies:
   property_change_notifier: ^0.3.0
   path: ^1.8.1
   provider: ^6.0.3
+  gallery_saver: ^2.3.2
+  fluttertoast: ^8.0.9
 
 dev_dependencies:
   flutter_test: