feat: Add deleteFile() endpoint to database

lib/src/database/database_api.dart

@@ -121,6 +121,8 @@ abstract class DatabaseApi {
 
   Future storeFile(Uri mxcUri, Uint8List bytes, int time);
 
+  Future<bool> deleteFile(Uri mxcUri);
+
   Future storeSyncFilterId(
     String syncFilterId,
   );

lib/src/database/database_file_storage_io.dart

@@ -9,13 +9,15 @@ mixin DatabaseFileStorage {
   late final Uri? fileStorageLocation;
   late final Duration? deleteFilesAfterDuration;
 
+  File _getFileFromMxc(Uri mxcUri) => File(
+        '${Directory.fromUri(fileStorageLocation!).path}/${mxcUri.toString().split('/').last}',
+      );
+
   Future<void> storeFile(Uri mxcUri, Uint8List bytes, int time) async {
     final fileStorageLocation = this.fileStorageLocation;
     if (!supportsFileStoring || fileStorageLocation == null) return;
 
-    final dir = Directory.fromUri(fileStorageLocation);
-
-    final file = File('${dir.path}/${mxcUri.toString().split('/').last}');
+    final file = _getFileFromMxc(mxcUri);
 
     if (await file.exists()) return;
     await file.writeAsBytes(bytes);
@@ -25,14 +27,24 @@ mixin DatabaseFileStorage {
     final fileStorageLocation = this.fileStorageLocation;
     if (!supportsFileStoring || fileStorageLocation == null) return null;
 
-    final dir = Directory.fromUri(fileStorageLocation);
-
-    final file = File('${dir.path}/${mxcUri.toString().split('/').last}');
+    final file = _getFileFromMxc(mxcUri);
 
     if (await file.exists()) return await file.readAsBytes();
     return null;
   }
 
+  Future<bool> deleteFile(Uri mxcUri) async {
+    final fileStorageLocation = this.fileStorageLocation;
+    if (!supportsFileStoring || fileStorageLocation == null) return false;
+
+    final file = _getFileFromMxc(mxcUri);
+
+    if (await file.exists() == false) return false;
+
+    await file.delete();
+    return true;
+  }
+
   Future<void> deleteOldFiles(int savedAt) async {
     final dirUri = fileStorageLocation;
     final deleteFilesAfterDuration = this.deleteFilesAfterDuration;

lib/src/database/database_file_storage_stub.dart

@@ -17,4 +17,6 @@ mixin DatabaseFileStorage {
   Future<void> deleteOldFiles(int savedAt) async {
     return;
   }
+
+  Future<bool> deleteFile(Uri mxcUri) async => false;
 }

lib/src/database/hive_collections_database.dart

@@ -462,6 +462,11 @@ class HiveCollectionsDatabase extends DatabaseApi {
     return null;
   }
 
+  @override
+  Future<bool> deleteFile(Uri mxcUri) async {
+    return false;
+  }
+
   @override
   Future<StoredInboundGroupSession?> getInboundGroupSession(
     String roomId,

lib/src/database/hive_database.dart

@@ -479,6 +479,11 @@ class FamedlySdkHiveDatabase extends DatabaseApi with ZoneTransactionMixin {
     return null;
   }
 
+  @override
+  Future<bool> deleteFile(Uri mxcUri) async {
+    return false;
+  }
+
   @override
   Future<StoredInboundGroupSession?> getInboundGroupSession(
     String roomId,

test/database_api_test.dart

@@ -78,7 +78,7 @@ void main() {
         final toDeviceQueue = await database.getToDeviceEventQueue();
         expect(toDeviceQueue.isEmpty, true);
       });
-      test('storeFile', () async {
+      test('storeFile and deleteFile', () async {
         await database.storeFile(
           Uri.parse('mxc://test'),
           Uint8List.fromList([0]),
@@ -86,6 +86,13 @@ void main() {
         );
         final file = await database.getFile(Uri.parse('mxc://test'));
         expect(file != null, database.supportsFileStoring);
+
+        final result = await database.deleteFile(Uri.parse('mxc://test'));
+        expect(result, database.supportsFileStoring);
+        if (result) {
+          final file = await database.getFile(Uri.parse('mxc://test'));
+          expect(file, null);
+        }
       });
       test('getFile', () async {
         await database.getFile(Uri.parse('mxc://test'));