/*
 * Licensed under the GNU Lesser General Public License Version 3
 *
 * This library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the license, or
 * (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */

// generated automatically - do not change


module gio.SocketService;

private import gio.SocketConnection;
private import gio.SocketListener;
private import gio.c.functions;
public  import gio.c.types;
private import glib.ConstructionException;
private import gobject.ObjectG;
private import gobject.Signals;
private import std.algorithm;


/**
 * A #GSocketService is an object that represents a service that
 * is provided to the network or over local sockets.  When a new
 * connection is made to the service the #GSocketService::incoming
 * signal is emitted.
 * 
 * A #GSocketService is a subclass of #GSocketListener and you need
 * to add the addresses you want to accept connections on with the
 * #GSocketListener APIs.
 * 
 * There are two options for implementing a network service based on
 * #GSocketService. The first is to create the service using
 * g_socket_service_new() and to connect to the #GSocketService::incoming
 * signal. The second is to subclass #GSocketService and override the
 * default signal handler implementation.
 * 
 * In either case, the handler must immediately return, or else it
 * will block additional incoming connections from being serviced.
 * If you are interested in writing connection handlers that contain
 * blocking code then see #GThreadedSocketService.
 * 
 * The socket service runs on the main loop of the
 * [thread-default context][g-main-context-push-thread-default-context]
 * of the thread it is created in, and is not
 * threadsafe in general. However, the calls to start and stop the
 * service are thread-safe so these can be used from threads that
 * handle incoming clients.
 *
 * Since: 2.22
 */
public class SocketService : SocketListener
{
	/** the main Gtk struct */
	protected GSocketService* gSocketService;

	/** Get the main Gtk struct */
	public GSocketService* getSocketServiceStruct(bool transferOwnership = false)
	{
		if (transferOwnership)
			ownedRef = false;
		return gSocketService;
	}

	/** the main Gtk struct as a void* */
	protected override void* getStruct()
	{
		return cast(void*)gSocketService;
	}

	protected override void setStruct(GObject* obj)
	{
		gSocketService = cast(GSocketService*)obj;
		super.setStruct(obj);
	}

	/**
	 * Sets our main struct and passes it to the parent class.
	 */
	public this (GSocketService* gSocketService, bool ownedRef = false)
	{
		this.gSocketService = gSocketService;
		super(cast(GSocketListener*)gSocketService, ownedRef);
	}


	/** */
	public static GType getType()
	{
		return g_socket_service_get_type();
	}

	/**
	 * Creates a new #GSocketService with no sockets to listen for.
	 * New listeners can be added with e.g. g_socket_listener_add_address()
	 * or g_socket_listener_add_inet_port().
	 *
	 * Returns: a new #GSocketService.
	 *
	 * Since: 2.22
	 *
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this()
	{
		auto p = g_socket_service_new();

		if(p is null)
		{
			throw new ConstructionException("null returned by new");
		}

		this(cast(GSocketService*) p, true);
	}

	/**
	 * Check whether the service is active or not. An active
	 * service will accept new clients that connect, while
	 * a non-active service will let connecting clients queue
	 * up until the service is started.
	 *
	 * Returns: %TRUE if the service is active, %FALSE otherwise
	 *
	 * Since: 2.22
	 */
	public bool isActive()
	{
		return g_socket_service_is_active(gSocketService) != 0;
	}

	/**
	 * Starts the service, i.e. start accepting connections
	 * from the added sockets when the mainloop runs.
	 *
	 * This call is thread-safe, so it may be called from a thread
	 * handling an incoming client request.
	 *
	 * Since: 2.22
	 */
	public void start()
	{
		g_socket_service_start(gSocketService);
	}

	/**
	 * Stops the service, i.e. stops accepting connections
	 * from the added sockets when the mainloop runs.
	 *
	 * This call is thread-safe, so it may be called from a thread
	 * handling an incoming client request.
	 *
	 * Note that this only stops accepting new connections; it does not
	 * close the listening sockets, and you can call
	 * g_socket_service_start() again later to begin listening again. To
	 * close the listening sockets, call g_socket_listener_close(). (This
	 * will happen automatically when the #GSocketService is finalized.)
	 *
	 * Since: 2.22
	 */
	public void stop()
	{
		g_socket_service_stop(gSocketService);
	}

	protected class OnIncomingDelegateWrapper
	{
		static OnIncomingDelegateWrapper[] listeners;
		bool delegate(SocketConnection, ObjectG, SocketService) dlg;
		gulong handlerId;

		this(bool delegate(SocketConnection, ObjectG, SocketService) dlg)
		{
			this.dlg = dlg;
			this.listeners ~= this;
		}

		void remove(OnIncomingDelegateWrapper source)
		{
			foreach(index, wrapper; listeners)
			{
				if (wrapper.handlerId == source.handlerId)
				{
					listeners[index] = null;
					listeners = std.algorithm.remove(listeners, index);
					break;
				}
			}
		}
	}

	/**
	 * The ::incoming signal is emitted when a new incoming connection
	 * to @service needs to be handled. The handler must initiate the
	 * handling of @connection, but may not block; in essence,
	 * asynchronous operations must be used.
	 *
	 * @connection will be unreffed once the signal handler returns,
	 * so you need to ref it yourself if you are planning to use it.
	 *
	 * Params:
	 *     connection = a new #GSocketConnection object
	 *     sourceObject = the source_object passed to
	 *         g_socket_listener_add_address()
	 *
	 * Returns: %TRUE to stop other handlers from being called
	 *
	 * Since: 2.22
	 */
	gulong addOnIncoming(bool delegate(SocketConnection, ObjectG, SocketService) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
	{
		auto wrapper = new OnIncomingDelegateWrapper(dlg);
		wrapper.handlerId = Signals.connectData(
			this,
			"incoming",
			cast(GCallback)&callBackIncoming,
			cast(void*)wrapper,
			cast(GClosureNotify)&callBackIncomingDestroy,
			connectFlags);
		return wrapper.handlerId;
	}

	extern(C) static int callBackIncoming(GSocketService* socketserviceStruct, GSocketConnection* connection, GObject* sourceObject, OnIncomingDelegateWrapper wrapper)
	{
		return wrapper.dlg(ObjectG.getDObject!(SocketConnection)(connection), ObjectG.getDObject!(ObjectG)(sourceObject), wrapper.outer);
	}

	extern(C) static void callBackIncomingDestroy(OnIncomingDelegateWrapper wrapper, GClosure* closure)
	{
		wrapper.remove(wrapper);
	}
}