/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

interface nsIArray;
interface nsIInputStream;

[scriptable, uuid(ae318e05-2a4e-4f85-95c0-e8b191ad812c)]
interface nsIPresentationChannelDescription: nsISupports
{
  const unsigned short TYPE_TCP = 1;
  const unsigned short TYPE_DATACHANNEL = 2;

  // Type of transport channel.
  readonly attribute uint8_t type;

  // Addresses for TCP channel.
  // Should only be used while type == TYPE_TCP.
  readonly attribute nsIArray tcpAddress;

  // Port number for TCP channel.
  // Should only be used while type == TYPE_TCP.
  readonly attribute uint16_t tcpPort;

  // SDP for Data Channel.
  // Should only be used while type == TYPE_DATACHANNEL.
  readonly attribute DOMString dataChannelSDP;
};

/*
 * The callbacks for events on control channel.
 */
[scriptable, uuid(d0cdc638-a9d5-4bcd-838c-3aed7c3f2a6b)]
interface nsIPresentationControlChannelListener: nsISupports
{
  /*
   * Callback for receiving offer from remote endpoint.
   * @param offer The received offer.
   */
  void onOffer(in nsIPresentationChannelDescription offer);

  /*
   * Callback for receiving answer from remote endpoint.
   * @param answer The received answer.
   */
  void onAnswer(in nsIPresentationChannelDescription answer);

  /*
   * The callback for notifying channel opened.
   */
  void notifyOpened();

  /*
   * The callback for notifying channel closed.
   * @param reason The reason of channel close, NS_OK represents normal close.
   */
  void notifyClosed(in nsresult reason);
};

/*
 * The control channel for establishing RTCPeerConnection for a presentation
 * session. SDP Offer/Answer will be exchanged through this interface.
 */
[scriptable, uuid(6bff04b9-8e79-466f-9446-f969de646fd3)]
interface nsIPresentationControlChannel: nsISupports
{
  // The listener for handling events of this control channel.
  // All the events should be pending until listener is assigned.
  attribute nsIPresentationControlChannelListener listener;

  /*
   * Send offer to remote endpiont. |onOffer| should be invoked
   * on remote endpoint.
   * @param offer The offer to send.
   * @throws  NS_ERROR_FAILURE on failure
   */
  void sendOffer(in nsIPresentationChannelDescription offer);

  /*
   * Send answer to remote endpiont. |onAnswer| should
   * be invoked on remote endpoint.
   * @param answer The answer to send.
   * @throws  NS_ERROR_FAILURE on failure
   */
  void sendAnswer(in nsIPresentationChannelDescription answer);

  /*
   * Close the transport channel.
   */
  void close();
};