bluetooth: add bluetooth integration

Missing support for things that require an agent, but has most basics.

Closes #17

src/dbus/objectmanager.cpp

@@ -0,0 +1,86 @@
+#include "objectmanager.hpp"
+
+#include <qcontainerfwd.h>
+#include <qdbusconnection.h>
+#include <qdbusmetatype.h>
+#include <qdbuspendingcall.h>
+#include <qdbuspendingreply.h>
+#include <qlogging.h>
+#include <qloggingcategory.h>
+#include <qtmetamacros.h>
+
+#include "dbus_objectmanager.h"
+#include "dbus_objectmanager_types.hpp"
+
+namespace {
+Q_LOGGING_CATEGORY(logDbusObjectManager, "quickshell.dbus.objectmanager", QtWarningMsg);
+}
+
+namespace qs::dbus {
+
+DBusObjectManager::DBusObjectManager(QObject* parent): QObject(parent) {
+	qDBusRegisterMetaType<DBusObjectManagerInterfaces>();
+	qDBusRegisterMetaType<DBusObjectManagerObjects>();
+}
+
+bool DBusObjectManager::setInterface(
+    const QString& service,
+    const QString& path,
+    const QDBusConnection& connection
+) {
+	delete this->mInterface;
+	this->mInterface = new DBusObjectManagerInterface(service, path, connection, this);
+
+	if (!this->mInterface->isValid()) {
+		qCWarning(logDbusObjectManager) << "Failed to create DBusObjectManagerInterface for" << service
+		                                << path << ":" << this->mInterface->lastError();
+		delete this->mInterface;
+		this->mInterface = nullptr;
+		return false;
+	}
+
+	QObject::connect(
+	    this->mInterface,
+	    &DBusObjectManagerInterface::InterfacesAdded,
+	    this,
+	    &DBusObjectManager::interfacesAdded
+	);
+
+	QObject::connect(
+	    this->mInterface,
+	    &DBusObjectManagerInterface::InterfacesRemoved,
+	    this,
+	    &DBusObjectManager::interfacesRemoved
+	);
+
+	this->fetchInitialObjects();
+	return true;
+}
+
+void DBusObjectManager::fetchInitialObjects() {
+	if (!this->mInterface) return;
+
+	auto reply = this->mInterface->GetManagedObjects();
+	auto* watcher = new QDBusPendingCallWatcher(reply, this);
+
+	QObject::connect(
+	    watcher,
+	    &QDBusPendingCallWatcher::finished,
+	    this,
+	    [this](QDBusPendingCallWatcher* watcher) {
+		    const QDBusPendingReply<DBusObjectManagerObjects> reply = *watcher;
+		    watcher->deleteLater();
+
+		    if (reply.isError()) {
+			    qCWarning(logDbusObjectManager) << "Failed to get managed objects:" << reply.error();
+			    return;
+		    }
+
+		    for (const auto& [path, interfaces]: reply.value().asKeyValueRange()) {
+			    emit this->interfacesAdded(path, interfaces);
+		    }
+	    }
+	);
+}
+
+} // namespace qs::dbus