refactor: move socket and datastream types to Io module

src/io/socket.hpp

@@ -0,0 +1,143 @@
+#pragma once
+
+#include <qlocalserver.h>
+#include <qlocalsocket.h>
+#include <qobject.h>
+#include <qqmlcomponent.h>
+#include <qqmlintegration.h>
+#include <qtclasshelpermacros.h>
+#include <qtmetamacros.h>
+
+#include "datastream.hpp"
+#include "../core/reload.hpp"
+
+///! Unix socket listener.
+class Socket: public DataStream {
+	Q_OBJECT;
+	/// Returns if the socket is currently connected.
+	///
+	/// Writing to this property will set the target connection state and will not
+	/// update the property immediately. Setting the property to false will begin disconnecting
+	/// the socket, and setting it to true will begin connecting the socket if path is not empty.
+	Q_PROPERTY(bool connected READ isConnected WRITE setConnected NOTIFY connectionStateChanged);
+	/// The path to connect this socket to when `connected` is set to true.
+	///
+	/// Changing this property will have no effect while the connection is active.
+	Q_PROPERTY(QString path READ path WRITE setPath NOTIFY pathChanged);
+	QML_ELEMENT;
+
+public:
+	explicit Socket(QObject* parent = nullptr): DataStream(parent) {}
+
+	/// Write data to the socket. Does nothing if not connected.
+	Q_INVOKABLE void write(const QString& data);
+
+	// takes ownership
+	void setSocket(QLocalSocket* socket);
+
+	[[nodiscard]] bool isConnected() const;
+	void setConnected(bool connected);
+
+	[[nodiscard]] QString path() const;
+	void setPath(QString path);
+
+signals:
+	/// This signal is sent whenever a socket error is encountered.
+	void error(QLocalSocket::LocalSocketError error);
+
+	void connectionStateChanged();
+	void pathChanged();
+
+protected:
+	[[nodiscard]] QIODevice* ioDevice() const override;
+
+private slots:
+	void onSocketConnected();
+	void onSocketDisconnected();
+
+private:
+	void connectPathSocket();
+
+	QLocalSocket* socket = nullptr;
+	bool connected = false;
+	bool disconnecting = false;
+	bool targetConnected = false;
+	QString mPath;
+};
+
+///! Unix socket server.
+/// #### Example
+/// ```qml
+/// SocketServer {
+///   active: true
+///   path: "/path/too/socket.sock"
+///   handler: Socket {
+///     onConnectedChanged: {
+///       console.log(connected ? "new connection!" : "connection dropped!")
+///     }
+///     parser: SplitParser {
+///       onRead: message => console.log(`read message from socket: ${message}`)
+///     }
+///   }
+/// }
+/// ```
+class SocketServer
+    : public QObject
+    , public PostReloadHook {
+	Q_OBJECT;
+	/// If the socket server is currently active. Defaults to false.
+	///
+	/// Setting this to false will destory all active connections and delete
+	/// the socket file on disk.
+	///
+	/// If path is empty setting this property will have no effect.
+	Q_PROPERTY(bool active READ isActive WRITE setActive NOTIFY activeStatusChanged);
+	/// The path to create the socket server at.
+	///
+	/// Setting this property while the server is active will have no effect.
+	Q_PROPERTY(QString path READ path WRITE setPath NOTIFY pathChanged);
+	/// Connection handler component. Must creeate a `Socket`.
+	///
+	/// The created socket should not set `connected` or `path` or the incoming
+	/// socket connection will be dropped (they will be set by the socket server.)
+	/// Setting `connected` to false on the created socket after connection will
+	/// close and delete it.
+	Q_PROPERTY(QQmlComponent* handler READ handler WRITE setHandler NOTIFY handlerChanged);
+	QML_ELEMENT;
+
+public:
+	explicit SocketServer(QObject* parent = nullptr): QObject(parent) {}
+	~SocketServer() override;
+	Q_DISABLE_COPY_MOVE(SocketServer);
+
+	void onPostReload() override;
+
+	[[nodiscard]] bool isActive() const;
+	void setActive(bool active);
+
+	[[nodiscard]] QString path() const;
+	void setPath(QString path);
+
+	[[nodiscard]] QQmlComponent* handler() const;
+	void setHandler(QQmlComponent* handler);
+
+signals:
+	void activeStatusChanged();
+	void pathChanged();
+	void handlerChanged();
+
+private slots:
+	void onNewConnection();
+
+private:
+	bool isActivatable();
+	void enableServer();
+	void disableServer();
+
+	QLocalServer* server = nullptr;
+	QQmlComponent* mHandler = nullptr;
+	QList<Socket*> mSockets;
+	bool activeTarget = false;
+	bool postReload = false;
+	QString mPath;
+};