Can update a conversation message

lib/ui/screens/conversation_screen.dart

@@ -289,6 +289,7 @@ class _ConversationScreenState extends State<ConversationScreen> {
               userInfo: _usersInfo.getUser(_messages[i].userID),
               isLastMessage: _isLastMessage(i),
               isFirstMessage: _isFirstMessage(i),
+              onRequestMessageUpdate: _updateMessage,
               onRequestMessageDelete: _deleteMessage,
             );
           }),
@@ -389,6 +390,33 @@ class _ConversationScreenState extends State<ConversationScreen> {
     );
   }
 
+  /// Request message content update
+  Future<void> _updateMessage(ConversationMessage message) async {
+    final newContent = await askUserString(
+        context: context,
+        title: tr("Update message"),
+        message: tr("Please enter new message content:"),
+        defaultValue: message.message,
+        hint: tr("New message"));
+
+    if (newContent == null) return;
+
+    if (!await _conversationsHelper.updateMessage(message.id, newContent)) {
+      showSimpleSnack(context, tr("Could not update message content!"));
+      return;
+    }
+
+    // Get the new version of the conversation message
+    final newMessage =
+        await _conversationsHelper.getSingleMessageFromCache(message.id);
+
+    setState(() {
+      final index = _messages.indexOf(message);
+      _messages.insert(index, newMessage);
+      _messages.removeAt(index + 1);
+    });
+  }
+
   /// Request message deletion
   Future<void> _deleteMessage(ConversationMessage message) async {
     final choice = await showDialog<bool>(
@@ -417,11 +445,10 @@ class _ConversationScreenState extends State<ConversationScreen> {
           ),
     );
 
-    if(choice == null || !choice)
-      return;
+    if (choice == null || !choice) return;
 
     // Execute the request
-    if(!await _conversationsHelper.deleteMessage(message.id))
+    if (!await _conversationsHelper.deleteMessage(message.id))
       showSimpleSnack(context, tr("Could not delete conversation message!"));
 
     // Remove the message from the list

lib/ui/tiles/conversation_message_tile.dart

@@ -12,8 +12,9 @@ import 'package:flutter/material.dart';
 ///
 /// @author Pierre HUBERT
 
-enum _MenuChoices { DELETE }
+enum _MenuChoices { DELETE, REQUEST_UPDATE_CONTENT }
 
+typedef OnRequestMessageUpdate = void Function(ConversationMessage);
 typedef OnRequestMessageDelete = void Function(ConversationMessage);
 
 class ConversationMessageTile extends StatelessWidget {
@@ -21,6 +22,7 @@ class ConversationMessageTile extends StatelessWidget {
   final User userInfo;
   final bool isLastMessage;
   final bool isFirstMessage;
+  final OnRequestMessageUpdate onRequestMessageUpdate;
   final OnRequestMessageDelete onRequestMessageDelete;
 
   const ConversationMessageTile({
@@ -29,11 +31,13 @@ class ConversationMessageTile extends StatelessWidget {
     @required this.userInfo,
     @required this.isLastMessage,
     @required this.isFirstMessage,
+    @required this.onRequestMessageUpdate,
     @required this.onRequestMessageDelete,
   })  : assert(message != null),
         assert(userInfo != null),
         assert(isLastMessage != null),
         assert(isFirstMessage != null),
+        assert(onRequestMessageUpdate != null),
         assert(onRequestMessageDelete != null),
         super(key: key);
 
@@ -47,6 +51,14 @@ class ConversationMessageTile extends StatelessWidget {
           width: 35.0,
         ),
         itemBuilder: (c) => [
+              // Update message content
+              PopupMenuItem(
+                enabled: message.isOwner,
+                value: _MenuChoices.REQUEST_UPDATE_CONTENT,
+                child: Text(tr("Update")),
+              ),
+
+              // Delete the message
               PopupMenuItem(
                 enabled: message.isOwner,
                 value: _MenuChoices.DELETE,
@@ -256,12 +268,14 @@ class ConversationMessageTile extends StatelessWidget {
 
   /// Process menu choice
   void _menuOptionSelected(_MenuChoices value) {
+    switch (value) {
+      case _MenuChoices.REQUEST_UPDATE_CONTENT:
+        onRequestMessageUpdate(message);
+        break;
 
-    switch(value){
       case _MenuChoices.DELETE:
         onRequestMessageDelete(message);
         break;
     }
-
   }
 }