service/greetd: add greetd service

src/services/greetd/connection.hpp

@@ -0,0 +1,74 @@
+#pragma once
+
+#include <qcontainerfwd.h>
+#include <qjsonobject.h>
+#include <qlocalsocket.h>
+#include <qobject.h>
+#include <qqmlintegration.h>
+#include <qtmetamacros.h>
+
+class GreetdState: public QObject {
+	Q_OBJECT;
+	QML_ELEMENT;
+	QML_SINGLETON;
+
+public:
+	enum Enum {
+		Inactive = 0,
+		Authenticating = 1,
+		ReadyToLaunch = 2,
+		Launching = 3,
+		Launched = 4,
+	};
+	Q_ENUM(Enum);
+
+	Q_INVOKABLE static QString toString(GreetdState::Enum value);
+};
+
+class GreetdConnection: public QObject {
+	Q_OBJECT;
+
+public:
+	void createSession(QString user);
+	void cancelSession();
+	void respond(QString response);
+	void launch(const QList<QString>& command, const QList<QString>& environment, bool exit);
+
+	[[nodiscard]] bool isAvailable() const;
+	[[nodiscard]] GreetdState::Enum state() const;
+
+	[[nodiscard]] QString user() const;
+
+	static GreetdConnection* instance();
+
+signals:
+	void authMessage(QString message, bool error, bool responseRequired, bool echoResponse);
+	void authFailure(QString message);
+	void readyToLaunch();
+	void launched();
+	void error(QString error);
+
+	void stateChanged();
+	void userChanged();
+
+private slots:
+	void onSocketConnected();
+	void onSocketError(QLocalSocket::LocalSocketError error);
+	void onSocketReady();
+
+private:
+	explicit GreetdConnection();
+
+	void sendRequest(const QJsonObject& json);
+	void setActive(bool active);
+	void setInactive();
+
+	bool mAvailable = false;
+	GreetdState::Enum mState = GreetdState::Inactive;
+	bool mTargetActive = false;
+	bool mExitAfterLaunch = false;
+	QString mMessage;
+	bool mResponseRequired = false;
+	QString mUser;
+	QLocalSocket socket;
+};