feat(llc, ui): add delete message for me

migrations/v10-migration.md

@@ -8,6 +8,10 @@
 
 This guide includes breaking changes grouped by release phase:
 
+### 🚧 v10.0.0-beta.7
+
+- [MessageState](#-messagestate)
+
 ### 🚧 v10.0.0-beta.4
 
 - [SendReaction](#-sendreaction)
@@ -28,6 +32,77 @@ This guide includes breaking changes grouped by release phase:
 
 ---
 
+## 🧪 Migration for v10.0.0-beta.7
+
+### 🛠 MessageState
+
+#### Key Changes:
+
+- `MessageState` factory constructors now accept `MessageDeleteScope` instead of `bool hard` parameter
+- Pattern matching callbacks in state classes now receive `MessageDeleteScope scope` instead of `bool hard`
+- New delete-for-me functionality with dedicated states and methods
+
+#### Migration Steps:
+
+**Before:**
+```dart
+// Factory constructors with bool hard
+final deletingState = MessageState.deleting(hard: true);
+final deletedState = MessageState.deleted(hard: false);
+final failedState = MessageState.deletingFailed(hard: true);
+
+// Pattern matching with bool hard
+message.state.whenOrNull(
+  deleting: (hard) => handleDeleting(hard),
+  deleted: (hard) => handleDeleted(hard),
+  deletingFailed: (hard) => handleDeletingFailed(hard),
+);
+```
+
+**After:**
+```dart
+// Factory constructors with MessageDeleteScope
+final deletingState = MessageState.deleting(
+  scope: MessageDeleteScope.hardDeleteForAll,
+);
+final deletedState = MessageState.deleted(
+  scope: MessageDeleteScope.softDeleteForAll,
+);
+final failedState = MessageState.deletingFailed(
+  scope: MessageDeleteScope.deleteForMe(),
+);
+
+// Pattern matching with MessageDeleteScope
+message.state.whenOrNull(
+  deleting: (scope) => handleDeleting(scope.hard),
+  deleted: (scope) => handleDeleted(scope.hard),
+  deletingFailed: (scope) => handleDeletingFailed(scope.hard),
+);
+
+// New delete-for-me functionality
+channel.deleteMessageForMe(message); // Delete only for current user
+client.deleteMessageForMe(messageId); // Delete only for current user
+
+// Check delete-for-me states
+if (message.state.isDeletingForMe) {
+  // Handle deleting for me state
+}
+if (message.state.isDeletedForMe) {
+  // Handle deleted for me state  
+}
+if (message.state.isDeletingForMeFailed) {
+  // Handle delete for me failed state
+}
+```
+
+> ⚠️ **Important:**  
+> - All `MessageState` factory constructors now require `MessageDeleteScope` parameter
+> - Pattern matching callbacks receive `MessageDeleteScope` instead of `bool hard`
+> - Use `scope.hard` to access the hard delete boolean value
+> - New delete-for-me methods are available on both `Channel` and `StreamChatClient`
+
+---
+
 ## 🧪 Migration for v10.0.0-beta.4
 
 ### 🛠 SendReaction
@@ -429,6 +504,15 @@ StreamMessageWidget(
 
 ## 🎉 You're Ready to Migrate!
 
+### For v10.0.0-beta.7:
+- ✅ Update `MessageState` factory constructors to use `MessageDeleteScope` parameter
+- ✅ Update pattern matching callbacks to handle `MessageDeleteScope` instead of `bool hard`
+- ✅ Leverage new delete-for-me functionality with `deleteMessageForMe` methods
+- ✅ Use new state checking methods for delete-for-me operations
+
+### For v10.0.0-beta.4:
+- ✅ Update `sendReaction` method calls to use `Reaction` object instead of individual parameters
+
 ### For v10.0.0-beta.3:
 - ✅ Update attachment picker options to use `SystemAttachmentPickerOption` or `TabbedAttachmentPickerOption`
 - ✅ Handle new `StreamAttachmentPickerResult` return type from attachment picker

packages/stream_chat/CHANGELOG.md

@@ -1,3 +1,22 @@
+## Upcoming Beta
+
+🛑️ Breaking
+
+- **Changed `MessageState` factory constructors**: The `deleting`, `deleted`, and `deletingFailed` 
+  factory constructors now accept a `MessageDeleteScope` parameter instead of `bool hard`. 
+  Pattern matching callbacks also receive `MessageDeleteScope scope` instead of `bool hard`.
+
+✅ Added
+
+- Added support for deleting messages only for the current user:
+  - `Channel.deleteMessageForMe()` - Delete a message only for the current user
+  - `StreamChatClient.deleteMessageForMe()` - Delete a message only for the current user via client
+  - `MessageDeleteScope` - New sealed class to represent deletion scope
+  - `MessageState.deletingForMe`, `MessageState.deletedForMe`, `MessageState.deletingForMeFailed` states
+  - `Message.deletedOnlyForMe`, `Event.deletedForMe`, `Member.deletedMessages` model fields
+
+For more details, please refer to the [migration guide](../../migrations/v10-migration.md).
+
 ## 10.0.0-beta.6
 
 - Included the changes from version [`9.17.0`](https://pub.dev/packages/stream_chat/changelog).

packages/stream_chat/lib/src/client/channel.dart

@@ -920,31 +920,49 @@ class Channel {
 
   final _deleteMessageLock = Lock();
 
-  /// Deletes the [message] from the channel.
-  Future<EmptyResponse> deleteMessage(
+  /// Deletes the [message] for everyone.
+  ///
+  /// If [hard] is true, the message is permanently deleted from the server
+  /// and cannot be recovered. In this case, any attachments associated with the
+  /// message are also deleted from the server.
+  Future<EmptyResponse> deleteMessage(Message message, {bool hard = false}) {
+    final deletionScope = MessageDeleteScope.deleteForAll(hard: hard);
+
+    return _deleteMessage(message, scope: deletionScope);
+  }
+
+  /// Deletes the [message] only for the current user.
+  ///
+  /// Note: This does not delete the message for other channel members and
+  /// they can still see the message.
+  Future<EmptyResponse> deleteMessageForMe(Message message) {
+    const deletionScope = MessageDeleteScope.deleteForMe();
+
+    return _deleteMessage(message, scope: deletionScope);
+  }
+
+  // Deletes the [message] from the channel.
+  //
+  // The [scope] defines whether to delete the message for everyone or just
+  // for the current user.
+  //
+  // If the message is a local message (not yet sent to the server) or a bounced
+  // error message, it is deleted locally without making an API call.
+  //
+  // If the message is deleted for everyone and [scope.hard] is true, the
+  // message is permanently deleted from the server and cannot be recovered.
+  // In this case, any attachments associated with the message are also deleted
+  // from the server.
+  Future<EmptyResponse> _deleteMessage(
     Message message, {
-    bool hard = false,
+    required MessageDeleteScope scope,
   }) async {
     _checkInitialized();
 
     // Directly deleting the local messages and bounced error messages as they
     // are not available on the server.
     if (message.remoteCreatedAt == null || message.isBouncedWithError) {
-      state?.deleteMessage(
-        message.copyWith(
-          type: MessageType.deleted,
-          localDeletedAt: DateTime.now(),
-          state: MessageState.deleted(hard: hard),
-        ),
-        hardDelete: hard,
-      );
-
-      // Removing the attachments upload completer to stop the `sendMessage`
-      // waiting for attachments to complete.
-      _messageAttachmentsUploadCompleter
-          .remove(message.id)
-          ?.completeError(const StreamChatError('Message deleted'));
-
+      _deleteLocalMessage(message);
       // Returning empty response to mark the api call as success.
       return EmptyResponse();
     }
@@ -953,44 +971,39 @@ class Channel {
     message = message.copyWith(
       type: MessageType.deleted,
       deletedAt: DateTime.now(),
-      state: MessageState.deleting(hard: hard),
+      deletedForMe: scope is DeleteForMe,
+      state: MessageState.deleting(scope: scope),
     );
 
-    state?.deleteMessage(message, hardDelete: hard);
+    state?.deleteMessage(message, hardDelete: scope.hard);
 
     try {
       // Wait for the previous delete call to finish. Otherwise, the order of
       // messages will not be maintained.
       final response = await _deleteMessageLock.synchronized(
-        () => _client.deleteMessage(message.id, hard: hard),
+        () => switch (scope) {
+          DeleteForMe() => _client.deleteMessageForMe(message.id),
+          DeleteForAll() => _client.deleteMessage(message.id, hard: scope.hard),
+        },
       );
 
       final deletedMessage = message.copyWith(
-        state: MessageState.deleted(hard: hard),
+        deletedForMe: scope is DeleteForMe,
+        state: MessageState.deleted(scope: scope),
       );
 
-      state?.deleteMessage(deletedMessage, hardDelete: hard);
-
-      if (hard) {
-        deletedMessage.attachments.forEach((attachment) {
-          if (attachment.uploadState.isSuccess) {
-            if (attachment.type == AttachmentType.image) {
-              deleteImage(attachment.imageUrl!);
-            } else if (attachment.type == AttachmentType.file) {
-              deleteFile(attachment.assetUrl!);
-            }
-          }
-        });
-      }
+      state?.deleteMessage(deletedMessage, hardDelete: scope.hard);
+      // If hard delete, also delete the attachments from the server.
+      if (scope.hard) _deleteMessageAttachments(deletedMessage);
 
       return response;
     } catch (e) {
       final failedMessage = message.copyWith(
         // Update the message state to failed.
-        state: MessageState.deletingFailed(hard: hard),
+        state: MessageState.deletingFailed(scope: scope),
       );
 
-      state?.deleteMessage(failedMessage, hardDelete: hard);
+      state?.deleteMessage(failedMessage, hardDelete: scope.hard);
       // If the error is retriable, add it to the retry queue.
       if (e is StreamChatNetworkError && e.isRetriable) {
         state?._retryQueue.add([failedMessage]);
@@ -1000,6 +1013,43 @@ class Channel {
     }
   }
 
+  // Deletes a local [message] that is not yet sent to the server.
+  //
+  // This is typically called when a user wants to delete a message that they
+  // have composed but not yet sent, or if a message failed to send and the user
+  // wants to remove it from their local view.
+  void _deleteLocalMessage(Message message) {
+    state?.deleteMessage(
+      hardDelete: true, // Local messages are always hard deleted.
+      message.copyWith(
+        type: MessageType.deleted,
+        localDeletedAt: DateTime.now(),
+        state: MessageState.hardDeleted,
+      ),
+    );
+
+    // Removing the attachments upload completer to stop the `sendMessage`
+    // waiting for attachments to complete.
+    final completer = _messageAttachmentsUploadCompleter.remove(message.id);
+    completer?.completeError(const StreamChatError('Message deleted'));
+  }
+
+  // Deletes all the attachments associated with the given [message]
+  // from the server. This is typically called when a message is hard deleted.
+  Future<void> _deleteMessageAttachments(Message message) async {
+    final attachments = message.attachments;
+    final deleteFutures = attachments.map((it) async {
+      if (it.imageUrl case final url?) return deleteImage(url);
+      if (it.assetUrl case final url?) return deleteFile(url);
+    });
+
+    try {
+      await Future.wait(deleteFutures);
+    } catch (e, stk) {
+      _client.logger.warning('Error deleting message attachments', e, stk);
+    }
+  }
+
   /// Retries operations on a message based on its failed state.
   ///
   /// This method examines the message's state and performs the appropriate
@@ -1009,9 +1059,12 @@ class Channel {
   /// - For [MessageState.partialUpdatingFailed], it attempts to partially
   ///   update the message with the same 'set' and 'unset' parameters that were
   ///   used in the original request.
-  /// - For [MessageState.deletingFailed], it attempts to delete the message.
-  ///   with the same 'hard' parameter that was used in the original request
+  /// - For [MessageState.deletingFailed], it attempts to delete the message
+  ///   again, using the same scope (for me or for all) as the original request.
   /// - For messages with [isBouncedWithError], it attempts to send the message.
+  ///
+  /// Throws a [StateError] if the message is not in a failed state or
+  /// bounced with an error.
   Future<Object> retryMessage(Message message) async {
     assert(
       message.state.isFailed || message.isBouncedWithError,
@@ -1038,7 +1091,10 @@ class Channel {
             skipEnrichUrl: skipEnrichUrl,
           );
         },
-        deletingFailed: (hard) => deleteMessage(message, hard: hard),
+        deletingFailed: (scope) => switch (scope) {
+          DeleteForMe() => deleteMessageForMe(message),
+          DeleteForAll(hard: final hard) => deleteMessage(message, hard: hard),
+        },
       ),
       orElse: () {
         // Check if the message is bounced with error.

packages/stream_chat/lib/src/client/client.dart

@@ -1744,21 +1744,29 @@ class StreamChatClient {
         skipEnrichUrl: skipEnrichUrl,
       );
 
-  /// Deletes the given message
+  /// Deletes the given message.
+  ///
+  /// If [hard] is true, the message is permanently deleted.
   Future<EmptyResponse> deleteMessage(
     String messageId, {
     bool hard = false,
-  }) async {
-    final response = await _chatApi.message.deleteMessage(
+  }) {
+    return _chatApi.message.deleteMessage(
       messageId,
       hard: hard,
     );
+  }
 
-    if (hard) {
-      await chatPersistenceClient?.deleteMessageById(messageId);
-    }
-
-    return response;
+  /// Deletes the given message for the current user only.
+  ///
+  /// Note: This does not delete the message for other users in the channel.
+  Future<EmptyResponse> deleteMessageForMe(
+    String messageId,
+  ) {
+    return _chatApi.message.deleteMessage(
+      messageId,
+      deleteForMe: true,
+    );
   }
 
   /// Get a message by [messageId]

packages/stream_chat/lib/src/core/api/message_api.dart

@@ -175,14 +175,20 @@ class MessageApi {
   Future<EmptyResponse> deleteMessage(
     String messageId, {
     bool? hard,
+    bool? deleteForMe,
   }) async {
+    if (hard == true && deleteForMe == true) {
+      throw ArgumentError(
+        'Both hard and deleteForMe cannot be set at the same time.',
+      );
+    }
+
     final response = await _client.delete(
       '/messages/$messageId',
-      queryParameters: hard != null
-          ? {
-              'hard': hard,
-            }
-          : null,
+      queryParameters: {
+        if (hard != null) 'hard': hard,
+        if (deleteForMe != null) 'delete_for_me': deleteForMe,
+      },
     );
     return EmptyResponse.fromJson(response.data);
   }