feat(eventsub): implement clearchat (#5981)

src/providers/twitch/eventsub/MessageHandlers.cpp

@@ -0,0 +1,29 @@
+#include "providers/twitch/eventsub/MessageHandlers.hpp"
+
+#include "Application.hpp"
+#include "messages/MessageBuilder.hpp"
+#include "providers/twitch/TwitchChannel.hpp"
+#include "singletons/Settings.hpp"
+#include "singletons/WindowManager.hpp"
+#include "util/PostToThread.hpp"
+
+namespace chatterino::eventsub {
+
+void handleModerateMessage(
+    TwitchChannel *chan, const QDateTime &time,
+    const lib::payload::channel_moderate::v2::Event &event,
+    const lib::payload::channel_moderate::v2::Clear & /*action*/)
+{
+    runInGuiThread([chan, actor{event.moderatorUserLogin.qt()}, time] {
+        chan->addOrReplaceClearChat(
+            MessageBuilder::makeClearChatMessage(time, actor), time);
+        if (getSettings()->hideModerated)
+        {
+            // XXX: This is expensive. We could use a layout request if the layout
+            //      would store the previous message flags.
+            getApp()->getWindows()->forceLayoutChannelViews();
+        }
+    });
+}
+
+}  // namespace chatterino::eventsub