Implement disposeIdentifier method

hpoul · Apr 14, 2021 · 3b89a99 · 3b89a99
1 parent 82c7776
commit 3b89a99
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Showing 5 changed files with 31 additions and 0 deletions.
diff --git a/...d/src/main/kotlin/codeux/design/filepicker/file_picker_writable/FilePickerWritableImpl.kt b/...d/src/main/kotlin/codeux/design/filepicker/file_picker_writable/FilePickerWritableImpl.kt
@@ -313,6 +313,14 @@ class FilePickerWritableImpl(
     copyContentUriAndReturn(result, fileUri)
   }
 
+  fun disposeIdentifier(identifier: String) {
+    val activity = requireActivity()
+    val contentResolver = activity.applicationContext.contentResolver
+    val takeFlags: Int = Intent.FLAG_GRANT_READ_URI_PERMISSION or
+      Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+    contentResolver.releasePersistableUriPermission(Uri.parse(identifier), takeFlags)
+  }
+
   private fun requireActivity() = (plugin.activity
     ?: throw FilePickerException("Illegal state, expected activity to be there."))
 

diff --git a/...src/main/kotlin/codeux/design/filepicker/file_picker_writable/FilePickerWritablePlugin.kt b/...src/main/kotlin/codeux/design/filepicker/file_picker_writable/FilePickerWritablePlugin.kt
@@ -128,6 +128,12 @@ class FilePickerWritablePlugin : FlutterPlugin, MethodCallHandler,
               ?: throw FilePickerException("Expected argument 'path'")
             impl.writeFileWithIdentifier(result, identifier, File(path))
           }
+          "disposeIdentifier" -> {
+            val identifier = call.argument<String>("identifier")
+              ?: throw FilePickerException("Expected argument 'identifier'")
+            impl.disposeIdentifier(identifier)
+            result.success(null)
+          }
           else -> {
             result.notImplemented()
           }

diff --git a/example/lib/main.dart b/example/lib/main.dart
@@ -266,6 +266,8 @@ class FileInfoDisplay extends StatelessWidget {
                   ),
                   IconButton(
                     onPressed: () async {
+                      await FilePickerWritable()
+                          .disposeIdentifier(fileInfo.identifier);
                       final appData = await appDataBloc.store.load();
                       await appDataBloc.store.save(appData.copyWith(
                           files: appData.files

diff --git a/ios/Classes/SwiftFilePickerWritablePlugin.swift b/ios/Classes/SwiftFilePickerWritablePlugin.swift
@@ -83,6 +83,9 @@ public class SwiftFilePickerWritablePlugin: NSObject, FlutterPlugin {
                         throw FilePickerError.invalidArguments(message: "Expected 'identifier' and 'path' arguments.")
                 }
                 try writeFile(identifier: identifier, path: path, result: result)
+            case "disposeIdentifier":
+                // iOS doesn't have a concept of disposing identifiers (bookmarks)
+                result(nil)
             default:
                 result(FlutterMethodNotImplemented)
             }

diff --git a/lib/src/file_picker_writable.dart b/lib/src/file_picker_writable.dart
@@ -273,6 +273,18 @@ class FilePickerWritable {
     return _resultToFileInfo(result);
   }
 
+  /// Dispose of a persistable identifier, removing it from your app's list of
+  /// accessible files. Afterwards, you will need the user to re-pick the file
+  /// in order to access it again.
+  ///
+  /// Some platforms (Android) limit how many identifiers your app can persist
+  /// at once. Use this method to remove identifiers you no longer need.
+  Future<void> disposeIdentifier(String identifier) async {
+    _logger.finest('disposeIdentifier()');
+    return _channel
+        .invokeMethod<void>('disposeIdentifier', {'identifier': identifier});
+  }
+
   FileInfo _resultToFileInfo(Map<String, String> result) {
     return FileInfo(
       identifier: result['identifier']!,