add check if delete message is allowed to be executed

Signed-off-by: Marcel Hibbe <dev@mhibbe.de>

app/src/main/java/com/nextcloud/talk/controllers/ChatController.kt

@@ -2513,6 +2513,15 @@ class ChatController(args: Bundle) :
     }
 
     fun deleteMessage(message: IMessage?) {
+        if (!AttendeePermissionsUtil(currentConversation!!.permissions)
+                .canPostChatShareItemsDoReaction(conversationUser!!)
+        ) {
+            Log.e(
+                TAG, "Deletion of message is skipped because of restrictions by permissions. " +
+                    "This method should not have been called!"
+            )
+            Toast.makeText(context, R.string.nc_common_error_sorry, Toast.LENGTH_LONG).show()
+        } else {
             var apiVersion = 1
             // FIXME Fix API checking with guests?
             if (conversationUser != null) {
@@ -2558,6 +2567,7 @@ class ChatController(args: Bundle) :
                     }
                 })
         }
+    }
 
     fun replyPrivately(message: IMessage?) {
         val apiVersion =

app/src/main/java/com/nextcloud/talk/utils/AttendeePermissionsUtil.kt

@@ -34,7 +34,7 @@ class AttendeePermissionsUtil(flag: Int) {
         if (CapabilitiesUtil.hasSpreedFeatureCapability(user, "chat-permission")) {
             return canPostChatShareItemsDoReaction
         }
-        // if capability is not available the spreed version doesn't support to restrict this
+        // if capability is not available then the spreed version doesn't support to restrict this
         return true
     }