Convert all blocking D-Bus calls in launcher to async

src/gamelauncher.cpp

@@ -12,6 +12,7 @@
 #include <QDBusConnection>
 #include <QDBusConnectionInterface>
 #include <QDBusError>
+#include <QDBusPendingCallWatcher>
 #include <QDBusReply>
 #include <QDBusVariant>
 #include <QDateTime>
@@ -28,22 +29,6 @@ static const QString kGameCenterInterface = QStringLiteral("org.kde.GameCenter1"
 static const QString kRunnerService = QStringLiteral("org.kde.ALaKarte.Runner1");
 static const QString kRunnerPath = QStringLiteral("/org/kde/ALaKarte/Runner1");
 
-static bool pingDaemon(QDBusConnection bus)
-{
-    if (!bus.isConnected()) {
-        return false;
-    }
-    org::kde::GameCenter1 iface(kGameCenterService, kGameCenterPath, bus);
-    if (!iface.isValid()) {
-        return false;
-    }
-
-    iface.setTimeout(2000);
-    QDBusPendingReply<QString> reply = iface.Ping();
-    reply.waitForFinished();
-    return !reply.isError() && reply.value() == QLatin1String("ok");
-}
-
 static void disconnectDaemonSignals(QDBusConnection bus, GameLauncher *launcher)
 {
     if (!bus.isConnected()) {
@@ -577,89 +562,15 @@ QVariantMap GameLauncher::resolveLaunchInfo(Game *game) const
     return info;
 }
 
-void GameLauncher::launchGame(Game *game)
+void GameLauncher::dispatchLaunch(Game *game, const QVariantMap &launchSpec)
 {
-    if (!game) {
+    auto *iface = new org::kde::GameCenter1(kGameCenterService, kGameCenterPath, QDBusConnection::sessionBus(), this);
-        return;
+    iface->setTimeout(5000);
-    }
+    auto *watcher = new QDBusPendingCallWatcher(iface->Launch(launchSpec), this);
-
+    connect(watcher, &QDBusPendingCallWatcher::finished, this, [this, game, iface, watcher]() {
-    // Check if already running
+        watcher->deleteLater();
-    if (m_daemonGameToSession.contains(game->id())) {
+        iface->deleteLater();
-        Q_EMIT gameError(game, tr("Game is already running"));
+        QDBusPendingReply<QString> reply = *watcher;
-        return;
-    }
-
-    const QVariantMap info = resolveLaunchInfo(game);
-    if (!info.value(QStringLiteral("ok")).toBool()) {
-        Q_EMIT gameError(game, info.value(QStringLiteral("error")).toString());
-        return;
-    }
-
-    const QString launchCommand = info.value(QStringLiteral("launchCommand")).toString();
-    const QString launchType = info.value(QStringLiteral("launchType")).toString();
-    const QString provider = info.value(QStringLiteral("provider")).toString();
-
-    const QString runner = info.value(QStringLiteral("runner")).toString();
-    const QString runnerId = info.value(QStringLiteral("runnerId")).toString();
-    const QString runnerPath = info.value(QStringLiteral("runnerPath")).toString();
-    const QString prefixPath = info.value(QStringLiteral("prefixPath")).toString();
-    const QVariantMap envOverrides = info.value(QStringLiteral("envOverrides")).toMap();
-    if (runner == QLatin1String("proton") || runner == QLatin1String("wine")) {
-        const QString resolvedPrefixPath = info.value(QStringLiteral("resolvedPrefixPath")).toString();
-        if (!resolvedPrefixPath.isEmpty()) {
-            QDir().mkpath(resolvedPrefixPath);
-        }
-    }
-
-    const QString finalProgram = info.value(QStringLiteral("finalProgram")).toString();
-    const QStringList finalArgs = info.value(QStringLiteral("finalArgs")).toStringList();
-    const QString workingDirectory = info.value(QStringLiteral("workingDirectory")).toString();
-    const QVariantMap effectiveEnv = info.value(QStringLiteral("effectiveEnv")).toMap();
-
-    // Always try daemon first — for all launch types
-    {
-        org::kde::GameCenter1 iface(kGameCenterService, kGameCenterPath, QDBusConnection::sessionBus());
-        QVariantMap launchSpec = {
-            {QStringLiteral("command"), launchCommand},
-            {QStringLiteral("gameId"), game->id()},
-            {QStringLiteral("displayName"), game->name()},
-            {QStringLiteral("provider"), provider},
-            {QStringLiteral("origin"), QStringLiteral("ui")},
-        };
-
-        if (!runnerId.isEmpty()) {
-            launchSpec.insert(QStringLiteral("runnerId"), runnerId);
-        }
-        if (!runner.isEmpty()) {
-            launchSpec.insert(QStringLiteral("runner"), runner);
-        }
-        if (!runnerPath.isEmpty()) {
-            launchSpec.insert(QStringLiteral("runnerPath"), runnerPath);
-        }
-        if (!prefixPath.isEmpty()) {
-            launchSpec.insert(QStringLiteral("prefixPath"), prefixPath);
-        }
-
-        launchSpec.insert(QStringLiteral("requestedProgram"), info.value(QStringLiteral("program")).toString());
-        launchSpec.insert(QStringLiteral("requestedArgs"), info.value(QStringLiteral("args")).toStringList());
-        if (!envOverrides.isEmpty()) {
-            launchSpec.insert(QStringLiteral("requestedEnvOverrides"), envOverrides);
-        }
-
-        if (!finalProgram.isEmpty()) {
-            launchSpec.insert(QStringLiteral("program"), finalProgram);
-            launchSpec.insert(QStringLiteral("args"), finalArgs);
-        }
-        if (!effectiveEnv.isEmpty()) {
-            launchSpec.insert(QStringLiteral("envOverrides"), effectiveEnv);
-        }
-        if (!workingDirectory.isEmpty()) {
-            launchSpec.insert(QStringLiteral("workingDirectory"), workingDirectory);
-        }
-
-        iface.setTimeout(5000);
-        QDBusPendingReply<QString> reply = iface.Launch(launchSpec);
-        reply.waitForFinished();
         if (!reply.isError() && !reply.value().isEmpty()) {
             m_daemonGameToSession.insert(game->id(), reply.value());
             m_daemonSessionToGame.insert(reply.value(), game->id());
@@ -667,22 +578,255 @@ void GameLauncher::launchGame(Game *game)
             game->setLastPlayed(QDateTime::currentDateTime());
             Q_EMIT gameStarted(game);
             Q_EMIT runningGamesChanged();
-
             if (App::instance()->config()->exitAfterLaunch()) {
                 QTimer::singleShot(500, qApp, &QCoreApplication::quit);
             }
             return;
         }
-
         const QString launchError = reply.isError() ? reply.error().message() : QString();
-
-        // No fallback for non-URL commands — emit error
         if (!launchError.isEmpty()) {
             Q_EMIT gameError(game, tr("Game Center launch failed: %1").arg(launchError));
         } else {
             Q_EMIT gameError(game, tr("Game Center daemon is not available"));
         }
+    });
 }
+
+void GameLauncher::launchGame(Game *game)
+{
+    if (!game) {
+        return;
+    }
+
+    if (m_daemonGameToSession.contains(game->id())) {
+        Q_EMIT gameError(game, tr("Game is already running"));
+        return;
+    }
+
+    const QString command = game->launchCommand();
+    if (command.isEmpty()) {
+        Q_EMIT gameError(game, tr("No launch command configured"));
+        return;
+    }
+
+    const QString platform = game->platform().toLower();
+    QString provider;
+    if (platform == QLatin1String("steam")) {
+        provider = QStringLiteral("steam");
+    } else if (platform == QLatin1String("lutris")) {
+        provider = QStringLiteral("lutris");
+    } else {
+        provider = QStringLiteral("manual");
+    }
+
+    const QString runner = game->launchRunner().trimmed();
+    const QString runnerId = game->launchRunnerId().trimmed();
+    const QString runnerPath = game->launchRunnerPath().trimmed();
+    const QString prefixPath = game->launchPrefixPath().trimmed();
+    const bool hasLaunchOverrides = !runner.isEmpty() || !runnerId.isEmpty() || !runnerPath.isEmpty() || !prefixPath.isEmpty() || !game->launchEnv().isEmpty();
+
+    QVariantMap envOverrides;
+    const QVariantMap launchEnv = game->launchEnv();
+    for (auto it = launchEnv.constBegin(); it != launchEnv.constEnd(); ++it) {
+        const QString key = it.key();
+        if (!key.isEmpty() && !key.contains(QLatin1Char('='))) {
+            envOverrides.insert(key, it.value().toString());
+        }
+    }
+
+    if (!hasLaunchOverrides && command.startsWith(QLatin1String("steam://"))) {
+        QVariantMap launchSpec = {{QStringLiteral("command"), command},
+                                  {QStringLiteral("gameId"), game->id()},
+                                  {QStringLiteral("displayName"), game->name()},
+                                  {QStringLiteral("provider"), QStringLiteral("steam")},
+                                  {QStringLiteral("origin"), QStringLiteral("ui")}};
+        dispatchLaunch(game, launchSpec);
+        return;
+    }
+    if (!hasLaunchOverrides && command.startsWith(QLatin1String("lutris "))) {
+        QVariantMap launchSpec = {{QStringLiteral("command"), command},
+                                  {QStringLiteral("gameId"), game->id()},
+                                  {QStringLiteral("displayName"), game->name()},
+                                  {QStringLiteral("provider"), QStringLiteral("lutris")},
+                                  {QStringLiteral("origin"), QStringLiteral("ui")}};
+        dispatchLaunch(game, launchSpec);
+        return;
+    }
+
+    QStringList parts;
+    if (command.startsWith(QLatin1String("steam://"))) {
+        parts = {QStringLiteral("xdg-open"), command};
+        provider = QStringLiteral("steam");
+    } else if (command.startsWith(QLatin1String("lutris "))) {
+        parts = {QStringLiteral("xdg-open"), command.mid(7)};
+        provider = QStringLiteral("lutris");
+    } else {
+        parts = QProcess::splitCommand(command);
+    }
+    if (parts.isEmpty()) {
+        Q_EMIT gameError(game, tr("Invalid launch command"));
+        return;
+    }
+    const QString program = parts.takeFirst();
+    const QStringList args = parts;
+
+    if ((runner == QLatin1String("wine") || runner == QLatin1String("proton")) && (program == QLatin1String("xdg-open"))) {
+        Q_EMIT gameError(game, tr("This runner cannot be used with URL-based launch commands"));
+        return;
+    }
+
+    if (!runnerId.isEmpty()) {
+        QVariantMap runnerSpec = {{QStringLiteral("runnerId"), runnerId},
+                                  {QStringLiteral("runner"), runner},
+                                  {QStringLiteral("runnerPath"), runnerPath},
+                                  {QStringLiteral("gameId"), game->id()},
+                                  {QStringLiteral("prefixPath"), prefixPath},
+                                  {QStringLiteral("program"), program},
+                                  {QStringLiteral("args"), args},
+                                  {QStringLiteral("envOverrides"), envOverrides},
+                                  {QStringLiteral("useGameProfile"), true}};
+
+        QDBusConnection bus = QDBusConnection::sessionBus();
+        if (bus.isConnected() && bus.interface() && !bus.interface()->isServiceRegistered(kRunnerService)) {
+            bus.interface()->startService(kRunnerService);
+        }
+
+        auto *runnerIface = new org::kde::ALaKarte::Runner1(kRunnerService, kRunnerPath, QDBusConnection::sessionBus(), this);
+        runnerIface->setTimeout(2000);
+        auto *watcher = new QDBusPendingCallWatcher(runnerIface->ResolveLaunch(runnerSpec), this);
+        connect(watcher,
+                &QDBusPendingCallWatcher::finished,
+                this,
+                [this, game, command, provider, runner, runnerId, runnerPath, prefixPath, program, args, envOverrides, runnerIface, watcher]() {
+                    watcher->deleteLater();
+                    runnerIface->deleteLater();
+                    QDBusPendingReply<QVariantMap> reply = *watcher;
+                    if (reply.isError()) {
+                        Q_EMIT gameError(game, tr("Runner service is not available"));
+                        return;
+                    }
+                    const QVariantMap resolved = unwrapVariantMap(reply.value());
+                    if (!resolved.value(QStringLiteral("ok")).toBool()) {
+                        Q_EMIT gameError(game, resolved.value(QStringLiteral("error")).toString());
+                        return;
+                    }
+                    const QString finalProgram = resolved.value(QStringLiteral("finalProgram")).toString();
+                    const QStringList finalArgs = resolved.value(QStringLiteral("finalArgs")).toStringList();
+                    const QVariantMap effectiveEnv = resolved.value(QStringLiteral("effectiveEnv")).toMap();
+                    const QString resolvedPrefixPath = resolved.value(QStringLiteral("resolvedPrefixPath")).toString();
+                    if (!resolvedPrefixPath.isEmpty()) {
+                        QDir().mkpath(resolvedPrefixPath);
+                    }
+                    QVariantMap launchSpec = {{QStringLiteral("command"), command},
+                                              {QStringLiteral("gameId"), game->id()},
+                                              {QStringLiteral("displayName"), game->name()},
+                                              {QStringLiteral("provider"), provider},
+                                              {QStringLiteral("origin"), QStringLiteral("ui")},
+                                              {QStringLiteral("runnerId"), runnerId}};
+                    if (!runner.isEmpty())
+                        launchSpec.insert(QStringLiteral("runner"), runner);
+                    if (!runnerPath.isEmpty())
+                        launchSpec.insert(QStringLiteral("runnerPath"), runnerPath);
+                    if (!prefixPath.isEmpty())
+                        launchSpec.insert(QStringLiteral("prefixPath"), prefixPath);
+                    launchSpec.insert(QStringLiteral("requestedProgram"), program);
+                    launchSpec.insert(QStringLiteral("requestedArgs"), args);
+                    if (!envOverrides.isEmpty())
+                        launchSpec.insert(QStringLiteral("requestedEnvOverrides"), envOverrides);
+                    if (!finalProgram.isEmpty()) {
+                        launchSpec.insert(QStringLiteral("program"), finalProgram);
+                        launchSpec.insert(QStringLiteral("args"), finalArgs);
+                    }
+                    if (!effectiveEnv.isEmpty())
+                        launchSpec.insert(QStringLiteral("envOverrides"), effectiveEnv);
+                    dispatchLaunch(game, launchSpec);
+                });
+        return;
+    }
+
+    QString finalProgram = program;
+    QStringList finalArgs = args;
+    QVariantMap effectiveEnv = envOverrides;
+    QString resolvedPrefixPath;
+    QString resolvedSteamInstallPath;
+
+    if (runner == QLatin1String("custom")) {
+        if (runnerPath.isEmpty()) {
+            Q_EMIT gameError(game, tr("Custom runner is enabled but no runner path is configured"));
+            return;
+        }
+        finalProgram = runnerPath;
+        finalArgs = QStringList{program} + args;
+    } else if (runner == QLatin1String("wine")) {
+        QString wineExe = runnerPath;
+        if (wineExe.isEmpty()) {
+            wineExe = QStandardPaths::findExecutable(QStringLiteral("wine"));
+        }
+        if (wineExe.isEmpty()) {
+            Q_EMIT gameError(game, tr("Wine runner is enabled but Wine was not found"));
+            return;
+        }
+        QString winePrefix = prefixPath;
+        if (winePrefix.isEmpty()) {
+            winePrefix = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation) + QStringLiteral("/prefixes/") + game->id();
+        }
+        effectiveEnv.insert(QStringLiteral("WINEPREFIX"), winePrefix);
+        resolvedPrefixPath = winePrefix;
+        finalProgram = wineExe;
+        finalArgs = QStringList{program} + args;
+    } else if (runner == QLatin1String("proton")) {
+        QString protonExe = runnerPath;
+        if (protonExe.isEmpty()) {
+            protonExe = discoverDefaultProtonExecutable();
+        }
+        if (protonExe.isEmpty()) {
+            Q_EMIT gameError(game, tr("Proton runner is enabled but no Proton installation was found"));
+            return;
+        }
+        const QString steamInstallPath = findSteamClientInstallPathFromProton(protonExe);
+        resolvedSteamInstallPath = steamInstallPath;
+        QString compatDataPath = prefixPath;
+        if (compatDataPath.isEmpty()) {
+            compatDataPath = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation) + QStringLiteral("/prefixes/") + game->id();
+        }
+        effectiveEnv.insert(QStringLiteral("STEAM_COMPAT_DATA_PATH"), compatDataPath);
+        resolvedPrefixPath = compatDataPath;
+        if (!steamInstallPath.isEmpty()) {
+            effectiveEnv.insert(QStringLiteral("STEAM_COMPAT_CLIENT_INSTALL_PATH"), steamInstallPath);
+        }
+        finalProgram = protonExe;
+        finalArgs = QStringList{QStringLiteral("run"), program} + args;
+    }
+
+    if (!resolvedPrefixPath.isEmpty()) {
+        QDir().mkpath(resolvedPrefixPath);
+    }
+
+    QVariantMap launchSpec = {{QStringLiteral("command"), command},
+                              {QStringLiteral("gameId"), game->id()},
+                              {QStringLiteral("displayName"), game->name()},
+                              {QStringLiteral("provider"), provider},
+                              {QStringLiteral("origin"), QStringLiteral("ui")}};
+    if (!runner.isEmpty())
+        launchSpec.insert(QStringLiteral("runner"), runner);
+    if (!runnerPath.isEmpty())
+        launchSpec.insert(QStringLiteral("runnerPath"), runnerPath);
+    if (!prefixPath.isEmpty())
+        launchSpec.insert(QStringLiteral("prefixPath"), prefixPath);
+    launchSpec.insert(QStringLiteral("requestedProgram"), program);
+    launchSpec.insert(QStringLiteral("requestedArgs"), args);
+    if (!envOverrides.isEmpty())
+        launchSpec.insert(QStringLiteral("requestedEnvOverrides"), envOverrides);
+    launchSpec.insert(QStringLiteral("program"), finalProgram);
+    launchSpec.insert(QStringLiteral("args"), finalArgs);
+    if (!effectiveEnv.isEmpty())
+        launchSpec.insert(QStringLiteral("envOverrides"), effectiveEnv);
+    if (!game->workingDirectory().isEmpty())
+        launchSpec.insert(QStringLiteral("workingDirectory"), game->workingDirectory());
+    if (!resolvedSteamInstallPath.isEmpty())
+        launchSpec.insert(QStringLiteral("resolvedSteamInstallPath"), resolvedSteamInstallPath);
+
+    dispatchLaunch(game, launchSpec);
 }
 
 void GameLauncher::stopGame(Game *game)
@@ -836,15 +980,16 @@ void GameLauncher::onDaemonLaunchFailed(const QVariantMap &error)
 
 void GameLauncher::syncDaemonSessions()
 {
-    org::kde::GameCenter1 iface(kGameCenterService, kGameCenterPath, QDBusConnection::sessionBus());
+    auto *iface = new org::kde::GameCenter1(kGameCenterService, kGameCenterPath, QDBusConnection::sessionBus(), this);
-    iface.setTimeout(2000);
+    iface->setTimeout(2000);
-
+    auto *watcher = new QDBusPendingCallWatcher(iface->ListSessions(), this);
-    QDBusPendingReply<QVariantList> reply = iface.ListSessions();
+    connect(watcher, &QDBusPendingCallWatcher::finished, this, [this, iface, watcher]() {
-    reply.waitForFinished();
+        watcher->deleteLater();
+        iface->deleteLater();
+        QDBusPendingReply<QVariantList> reply = *watcher;
         if (reply.isError()) {
             return;
         }
-
         const QVariantList list = reply.value();
         for (const QVariant &v : list) {
             QVariantMap map;
@@ -857,8 +1002,8 @@ void GameLauncher::syncDaemonSessions()
                 onDaemonSessionAdded(map);
             }
         }
-
         applyRunningStateToLibrary();
+    });
 }
 
 void GameLauncher::applyRunningStateToLibrary()
@@ -876,18 +1021,31 @@ void GameLauncher::applyRunningStateToLibrary()
 void GameLauncher::checkDaemonAvailability()
 {
     ensureDaemon();
-    const bool available = pingDaemon(QDBusConnection::sessionBus());
+    QDBusConnection bus = QDBusConnection::sessionBus();
-
+    if (!bus.isConnected()) {
+        if (m_daemonAvailable) {
+            m_daemonAvailable = false;
+            Q_EMIT daemonAvailableChanged();
+        }
+        return;
+    }
+    auto *iface = new org::kde::GameCenter1(kGameCenterService, kGameCenterPath, bus, this);
+    iface->setTimeout(2000);
+    auto *watcher = new QDBusPendingCallWatcher(iface->Ping(), this);
+    connect(watcher, &QDBusPendingCallWatcher::finished, this, [this, iface, watcher]() {
+        watcher->deleteLater();
+        iface->deleteLater();
+        QDBusPendingReply<QString> reply = *watcher;
+        const bool available = !reply.isError() && reply.value() == QLatin1String("ok");
         disconnectDaemonSignals(QDBusConnection::sessionBus(), this);
-
         if (available) {
             connectDaemonSignals(QDBusConnection::sessionBus(), this);
         }
-
         if (available != m_daemonAvailable) {
             m_daemonAvailable = available;
             Q_EMIT daemonAvailableChanged();
         }
+    });
 }
 
 bool GameLauncher::daemonAvailable() const

src/gamelauncher.h

@@ -57,4 +57,5 @@ private:
     void shutdownSpawnedDaemon();
     void syncDaemonSessions();
     void applyRunningStateToLibrary();
+    void dispatchLaunch(Game *game, const QVariantMap &launchSpec);
 };