feat: Add Live Emote Updates for BTTV (#4147)

This feature is enabled by default and can be disabled in settings with the "Enable BTTV live emotes updates" setting.

Co-authored-by: Felanbird <41973452+Felanbird@users.noreply.github.com>
Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>

src/providers/twitch/TwitchChannel.cpp

@@ -15,6 +15,8 @@
 #include "messages/MessageElement.hpp"
 #include "messages/MessageThread.hpp"
 #include "providers/bttv/BttvEmotes.hpp"
+#include "providers/bttv/BttvLiveUpdates.hpp"
+#include "providers/bttv/liveupdates/BttvLiveUpdateMessages.hpp"
 #include "providers/RecentMessagesApi.hpp"
 #include "providers/seventv/eventapi/SeventvEventAPIDispatch.hpp"
 #include "providers/seventv/SeventvEmotes.hpp"
@@ -103,6 +105,7 @@ TwitchChannel::TwitchChannel(const QString &name)
         this->refreshFFZChannelEmotes(false);
         this->refreshBTTVChannelEmotes(false);
         this->refreshSevenTVChannelEmotes(false);
+        this->joinBttvChannel();
     });
 
     this->connected.connect([this]() {
@@ -121,6 +124,11 @@ TwitchChannel::TwitchChannel(const QString &name)
     this->destroyed.connect([this]() {
         getApp()->twitch->dropSeventvChannel(this->seventvUserID_,
                                              this->seventvEmoteSetID_);
+
+        if (getApp()->twitch->bttvLiveUpdates)
+        {
+            getApp()->twitch->bttvLiveUpdates->partChannel(this->roomId());
+        }
     });
 
     this->messageRemovedFromStart.connect([this](MessagePtr &msg) {
@@ -622,6 +630,66 @@ const QString &TwitchChannel::seventvEmoteSetID() const
     return this->seventvEmoteSetID_;
 }
 
+void TwitchChannel::joinBttvChannel() const
+{
+    if (getApp()->twitch->bttvLiveUpdates)
+    {
+        const auto currentAccount = getApp()->accounts->twitch.getCurrent();
+        QString userName;
+        if (currentAccount && !currentAccount->isAnon())
+        {
+            userName = currentAccount->getUserName();
+        }
+        getApp()->twitch->bttvLiveUpdates->joinChannel(this->roomId(),
+                                                       userName);
+    }
+}
+
+void TwitchChannel::addBttvEmote(
+    const BttvLiveUpdateEmoteUpdateAddMessage &message)
+{
+    auto emote = BttvEmotes::addEmote(this->getDisplayName(), this->bttvEmotes_,
+                                      message);
+
+    this->addOrReplaceLiveUpdatesAddRemove(true, "BTTV", QString() /*actor*/,
+                                           emote->name.string);
+}
+
+void TwitchChannel::updateBttvEmote(
+    const BttvLiveUpdateEmoteUpdateAddMessage &message)
+{
+    auto updated = BttvEmotes::updateEmote(this->getDisplayName(),
+                                           this->bttvEmotes_, message);
+    if (!updated)
+    {
+        return;
+    }
+
+    const auto [oldEmote, newEmote] = *updated;
+    if (oldEmote->name == newEmote->name)
+    {
+        return;  // only the creator changed
+    }
+
+    auto builder = MessageBuilder(liveUpdatesUpdateEmoteMessage, "BTTV",
+                                  QString() /* actor */, newEmote->name.string,
+                                  oldEmote->name.string);
+    this->addMessage(builder.release());
+}
+
+void TwitchChannel::removeBttvEmote(
+    const BttvLiveUpdateEmoteRemoveMessage &message)
+{
+    auto removed = BttvEmotes::removeEmote(this->bttvEmotes_, message);
+    if (!removed)
+    {
+        return;
+    }
+
+    this->addOrReplaceLiveUpdatesAddRemove(false, "BTTV", QString() /*actor*/,
+                                           removed.get()->name.string);
+}
+
 void TwitchChannel::addSeventvEmote(
     const SeventvEventAPIEmoteAddDispatch &dispatch)
 {