Fix highlight mentions not updating when username changes (#6723)

Reported-by: James Upjohn <jupjohn@jammeh.co.nz>
Reviewed-by: pajlada <rasmus.karlsson@pajlada.com>
Reviewed-by: Nerixyz <nerixdev@outlook.de>

src/providers/twitch/TwitchAccountManager.cpp

@@ -10,6 +10,7 @@
 #include "common/Literals.hpp"
 #include "common/network/NetworkResult.hpp"
 #include "common/QLogging.hpp"
+#include "controllers/accounts/AccountController.hpp"
 #include "messages/MessageBuilder.hpp"
 #include "providers/twitch/api/Helix.hpp"
 #include "providers/twitch/TwitchAccount.hpp"
@@ -50,13 +51,13 @@ QString missingScopes(const QJsonArray &scopesArray)
     return missingList;
 }
 
-void checkMissingScopes(const QString &token)
+void checkMissingScopes(const std::shared_ptr<TwitchAccount> &account)
 {
     NetworkRequest(u"https://id.twitch.tv/oauth2/validate"_s,
                    NetworkRequestType::Get)
-        .header("Authorization", u"OAuth " % token)
+        .header("Authorization", u"OAuth " % account->getOAuthToken())
         .timeout(20000)
-        .onSuccess([](const auto &res) {
+        .onSuccess([account](const auto &res) {
             auto *app = tryGetApp();
             if (!app)
             {
@@ -64,6 +65,15 @@ void checkMissingScopes(const QString &token)
             }
 
             const auto json = res.parseJson();
+
+            const auto login = json["login"_L1].toString();
+            if (!login.isEmpty() &&
+                login.compare(account->getUserName(), Qt::CaseInsensitive) != 0)
+            {
+                account->setUserName(login);
+                app->getAccounts()->twitch.currentUserNameChanged.invoke();
+            }
+
             auto missing = missingScopes(json["scopes"_L1].toArray());
             if (missing.isEmpty())
             {
@@ -209,7 +219,7 @@ TwitchAccountManager::TwitchAccountManager()
         currentUser->loadSeventvUserID();
         if (!currentUser->isAnon())
         {
-            checkMissingScopes(currentUser->getOAuthToken());
+            checkMissingScopes(currentUser);
         }
     });