Handle /nick command (#12)

CHANGES.md

@@ -7,7 +7,7 @@ Features ✨:
 
 Improvements 🙌:
  - "Add Matrix app" menu is now always visible (#1495)
- - Handle `/op` and `/deop` commands (#12)
+ - Handle `/op`, `/deop`, and `/nick` commands (#12)
 
 Bugfix 🐛:
  - Fix dark theme issue on login screen (#1097)

vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt

@@ -539,8 +539,8 @@ class RoomDetailViewModel @AssistedInject constructor(
                             popDraft()
                         }
                         is ParsedCommand.ChangeDisplayName        -> {
-                            // TODO
-                            _viewEvents.post(RoomDetailViewEvents.SlashCommandNotImplemented)
+                            handleChangeDisplayNameSlashCommand(slashCommandResult)
+                            popDraft()
                         }
                         is ParsedCommand.DiscardSession           -> {
                             if (room.isEncrypted()) {
@@ -685,6 +685,12 @@ class RoomDetailViewModel @AssistedInject constructor(
         }
     }
 
+    private fun handleChangeDisplayNameSlashCommand(changeDisplayName: ParsedCommand.ChangeDisplayName) {
+        launchSlashCommandFlow {
+            session.setDisplayName(session.myUserId, changeDisplayName.displayName, it)
+        }
+    }
+
     private fun handleKickSlashCommand(kick: ParsedCommand.KickUser) {
         launchSlashCommandFlow {
             room.kick(kick.userId, kick.reason, it)