pollymc/libraries/LocalPeer/include/LocalPeer.h

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#pragma once
#include <QObject>
#include <QString>
#include <memory>


class QLocalServer;
class LockedFile;

class ApplicationId
{
public: /* methods */
	// traditional app = installed system wide and used in a multi-user environment
	static ApplicationId fromTraditionalApp();
	// ID based on a path with all the application data (no two instances with the same data path should run)
	static ApplicationId fromPathAndVersion(const QString & dataPath, const QString & version);
	// custom ID
	static ApplicationId fromCustomId(const QString & id);
	// custom ID, based on a raw string previously acquired from 'toString'
	static ApplicationId fromRawString(const QString & id);


	QString toString()
	{
		return m_id;
	}

private: /* methods */
	ApplicationId(const QString & value)
	{
		m_id = value;
	}

private: /* data */
	QString m_id;
};

class LocalPeer : public QObject
{
	Q_OBJECT

public:
	LocalPeer(QObject *parent, const ApplicationId &appId);
	~LocalPeer();
	bool isClient();
	bool sendMessage(const QString &message, int timeout);
	ApplicationId applicationId() const;

Q_SIGNALS:
	void messageReceived(const QString &message);

protected Q_SLOTS:
	void receiveConnection();

protected:
	ApplicationId id;
	QString socketName;
	std::unique_ptr<QLocalServer> server;
	std::unique_ptr<LockedFile> lockFile;
};