feat: Live Emote Updates for 7TV (#4090)

Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/providers/twitch/TwitchIrcServer.hpp

@@ -19,6 +19,7 @@ class Settings;
 class Paths;
 class PubSub;
 class TwitchChannel;
+class SeventvEventAPI;
 
 class TwitchIrcServer final : public AbstractIrcServer, public Singleton
 {
@@ -41,6 +42,21 @@ public:
     void reloadSevenTVGlobalEmotes();
     void reloadAllSevenTVChannelEmotes();
 
+    /** Calls `func` with all twitch channels that have `emoteSetId` added. */
+    void forEachSeventvEmoteSet(const QString &emoteSetId,
+                                std::function<void(TwitchChannel &)> func);
+    /** Calls `func` with all twitch channels where the seventv-user-id is `userId`. */
+    void forEachSeventvUser(const QString &userId,
+                            std::function<void(TwitchChannel &)> func);
+    /**
+     * Checks if any channel still needs this `userID` or `emoteSetID`.
+     * If not, it unsubscribes from the respective messages.
+     *
+     * It's currently not possible to share emote sets among users,
+     * but it's a commonly requested feature.
+     */
+    void dropSeventvChannel(const QString &userID, const QString &emoteSetID);
+
     Atomic<QString> lastUserThatWhisperedMe;
 
     const ChannelPtr whispersChannel;
@@ -49,6 +65,7 @@ public:
     IndirectChannel watchingChannel;
 
     PubSub *pubsub;
+    std::unique_ptr<SeventvEventAPI> seventvEventAPI;
 
     const BttvEmotes &getBttvEmotes() const;
     const FfzEmotes &getFfzEmotes() const;