Add message for empty mod list. (Chatterino#4546)

CHANGELOG.md

@@ -10,6 +10,7 @@
 - Minor: Added better filter validation and error messages. (#4364)
 - Minor: Updated the look of the Black Theme to be more in line with the other themes. (#4523)
 - Minor: Reply context now censors blocked users. (#4502)
+- Minor: Added system message for empty mod list. (#4546)
 - Minor: Added `/lowtrust` command to open the suspicious user activity feed in browser. (#4542)
 - Bugfix: Fixed an issue where animated emotes would render on top of zero-width emotes. (#4314)
 - Bugfix: Fixed an issue where it was difficult to hover a zero-width emote. (#4314)

src/controllers/commands/CommandController.cpp

@@ -1161,6 +1161,13 @@ void CommandController::initialize(Settings &, Paths &paths)
             getHelix()->getModerators(
                 twitchChannel->roomId(), 500,
                 [channel, twitchChannel](auto result) {
+                    if (result.empty())
+                    {
+                        channel->addMessage(makeSystemMessage(
+                            "This channel does not have any moderators."));
+                        return;
+                    }
+
                     // TODO: sort results?
 
                     MessageBuilder builder;