feat: delete messages from context menu (#5956)

src/providers/twitch/TwitchChannel.cpp

@@ -1897,6 +1897,71 @@ void TwitchChannel::createClip()
         });
 }
 
+void TwitchChannel::deleteMessagesAs(const QString &messageID,
+                                     TwitchAccount *moderator)
+{
+    getHelix()->deleteChatMessages(
+        this->roomId(), moderator->getUserId(), messageID,
+        []() {
+            // Success handling, we do nothing: IRC/pubsub will dispatch the correct
+            // events to update state for us.
+        },
+        [lifetime{this->weak_from_this()}, messageID](auto error,
+                                                      const auto &message) {
+            auto self =
+                std::dynamic_pointer_cast<TwitchChannel>(lifetime.lock());
+            if (!self)
+            {
+                return;
+            }
+
+            QString errorMessage = QString("Failed to delete chat messages - ");
+
+            switch (error)
+            {
+                case HelixDeleteChatMessagesError::UserMissingScope: {
+                    errorMessage +=
+                        "Missing required scope. Re-login with your "
+                        "account and try again.";
+                }
+                break;
+
+                case HelixDeleteChatMessagesError::UserNotAuthorized: {
+                    errorMessage +=
+                        "you don't have permission to perform that action.";
+                }
+                break;
+
+                case HelixDeleteChatMessagesError::MessageUnavailable: {
+                    // Override default message prefix to match with IRC message format
+                    errorMessage =
+                        QString("The message %1 does not exist, was deleted, "
+                                "or is too old to be deleted.")
+                            .arg(messageID);
+                }
+                break;
+
+                case HelixDeleteChatMessagesError::UserNotAuthenticated: {
+                    errorMessage += "you need to re-authenticate.";
+                }
+                break;
+
+                case HelixDeleteChatMessagesError::Forwarded: {
+                    errorMessage += message;
+                }
+                break;
+
+                case HelixDeleteChatMessagesError::Unknown:
+                default: {
+                    errorMessage += "An unknown error has occurred.";
+                }
+                break;
+            }
+
+            self->addSystemMessage(errorMessage);
+        });
+}
+
 std::optional<EmotePtr> TwitchChannel::twitchBadge(const QString &set,
                                                    const QString &version) const
 {

src/providers/twitch/TwitchChannel.hpp

@@ -59,6 +59,7 @@ struct HelixGlobalBadges;
 using HelixChannelBadges = HelixGlobalBadges;
 
 class TwitchIrcServer;
+class TwitchAccount;
 
 const int MAX_QUEUED_REDEMPTIONS = 16;
 
@@ -164,6 +165,12 @@ public:
     QString getCurrentStreamID() const override;
     void createClip();
 
+    /// Delete the message with the specified ID as a moderator.
+    ///
+    /// If the ID is empty, all messages will be deleted, effectively clearing
+    /// the chat.
+    void deleteMessagesAs(const QString &messageID, TwitchAccount *moderator);
+
     // Data
     const QString &subscriptionUrl();
     const QString &channelUrl();

src/providers/twitch/TwitchIrcServer.cpp

@@ -647,7 +647,7 @@ void TwitchIrcServer::initialize()
                     {
                         // Gray out approve/deny button upon "ALLOWED" and "DENIED" statuses
                         // They are versions of automod_message_(denied|approved) but for mods.
-                        chan->deleteMessage("automod_" + msg.messageID);
+                        chan->disableMessage("automod_" + msg.messageID);
                     }
                 }
                 break;