[Server] Serve the login message through the database interface (#7854)

libcockatrice_network/libcockatrice/network/server/remote/server_database_interface.h

@@ -712,6 +712,11 @@ public:
     {
         return {};
     }
+    /** @brief The newest server message for the login banner; false when the lookup fails or finds no row. */
+    virtual bool getLatestServerMessage(int /* serverId */, QString & /* message */)
+    {
+        return false;
+    }
 
     virtual void clearSessionTables()
     {

servatrice/src/servatrice.cpp

@@ -820,26 +820,20 @@ void Servatrice::updateLoginMessage()
         return;
     }
 
-    QSqlQuery *query = servatriceDatabaseInterface->prepareQuery(
-        "select message from {prefix}_servermessages where id_server = :id_server order by timest desc limit 1");
-    query->bindValue(":id_server", serverId);
-    if (servatriceDatabaseInterface->execSqlQuery(query)) {
-        if (query->next()) {
-            const QString newLoginMessage = query->value(0).toString();
+    QString newLoginMessage;
+    if (servatriceDatabaseInterface->getLatestServerMessage(serverId, newLoginMessage)) {
+        loginMessageMutex.lock();
+        loginMessage = newLoginMessage;
+        loginMessageMutex.unlock();
 
-            loginMessageMutex.lock();
-            loginMessage = newLoginMessage;
-            loginMessageMutex.unlock();
-
-            Event_ServerMessage event;
-            event.set_message(newLoginMessage.toStdString());
-            SessionEvent *se = Server_ProtocolHandler::prepareSessionEvent(event);
-            QMapIterator<QString, Server_ProtocolHandler *> usersIterator(users);
-            while (usersIterator.hasNext()) {
-                usersIterator.next().value()->sendProtocolItem(*se);
-            }
-            delete se;
+        Event_ServerMessage event;
+        event.set_message(newLoginMessage.toStdString());
+        SessionEvent *se = Server_ProtocolHandler::prepareSessionEvent(event);
+        QMapIterator<QString, Server_ProtocolHandler *> usersIterator(users);
+        while (usersIterator.hasNext()) {
+            usersIterator.next().value()->sendProtocolItem(*se);
         }
+        delete se;
     }
 }
 

servatrice/src/servatrice_database_interface.cpp

@@ -3293,6 +3293,23 @@ Server_DatabaseInterface::UptimeSnapshot Servatrice_DatabaseInterface::getLatest
     return snapshot;
 }
 
+bool Servatrice_DatabaseInterface::getLatestServerMessage(int serverId, QString &message)
+{
+    if (!checkSql()) {
+        return false;
+    }
+
+    QSqlQuery *query = prepareQuery(
+        "select message from {prefix}_servermessages where id_server = :id_server order by timest desc limit 1");
+    query->bindValue(":id_server", serverId);
+    if (!execSqlQuery(query) || !query->next()) {
+        return false;
+    }
+
+    message = query->value(0).toString();
+    return true;
+}
+
 bool Servatrice_DatabaseInterface::removeUserAvatar(const QString &userName)
 {
     if (!checkSql()) {

servatrice/src/servatrice_database_interface.h

@@ -278,6 +278,7 @@ public:
     // Uptime snapshot as recorded by Servatrice::statusUpdate() into the
     // {prefix}_uptime table. valid is false when no snapshot exists yet.
     UptimeSnapshot getLatestUptimeSnapshot(int serverId) override;
+    bool getLatestServerMessage(int serverId, QString &message) override;
     bool removeUserAvatar(const QString &userName) override;
     // Outcome of removeUserBanner(), so the caller can tell a missing user apart
     // from a user who simply has no banner card set.