refactor: turn StreamerMode into a singleton(-like thing) (#5216)

src/controllers/commands/builtin/twitch/SendWhisper.cpp

@@ -16,6 +16,7 @@
 #include "providers/twitch/TwitchIrcServer.hpp"
 #include "singletons/Emotes.hpp"
 #include "singletons/Settings.hpp"
+#include "singletons/StreamerMode.hpp"
 #include "singletons/Theme.hpp"
 #include "util/Twitch.hpp"
 
@@ -183,7 +184,7 @@ bool appendWhisperMessageWordsLocally(const QStringList &words)
 
     if (getSettings()->inlineWhispers &&
         !(getSettings()->streamerModeSuppressInlineWhispers &&
-          isInStreamerMode()))
+          getIApp()->getStreamerMode()->isEnabled()))
     {
         app->twitch->forEachChannel(
             [&messagexD, overrideFlags](ChannelPtr _channel) {

src/controllers/notifications/NotificationController.cpp

@@ -9,6 +9,7 @@
 #include "providers/twitch/TwitchIrcServer.hpp"
 #include "providers/twitch/TwitchMessageBuilder.hpp"
 #include "singletons/Settings.hpp"
+#include "singletons/StreamerMode.hpp"
 #include "singletons/Toasts.hpp"
 #include "singletons/WindowManager.hpp"
 #include "util/Helpers.hpp"
@@ -186,14 +187,15 @@ void NotificationController::checkStream(bool live, QString channelName)
         getIApp()->getToasts()->sendChannelNotification(channelName, QString(),
                                                         Platform::Twitch);
     }
+    bool inStreamerMode = getIApp()->getStreamerMode()->isEnabled();
     if (getSettings()->notificationPlaySound &&
-        !(isInStreamerMode() &&
+        !(inStreamerMode &&
           getSettings()->streamerModeSuppressLiveNotifications))
     {
         getIApp()->getNotifications()->playSound();
     }
     if (getSettings()->notificationFlashTaskbar &&
-        !(isInStreamerMode() &&
+        !(inStreamerMode &&
           getSettings()->streamerModeSuppressLiveNotifications))
     {
         getIApp()->getWindows()->sendAlert();