/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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/. */

#ifndef mozilla_net_WebSocketEventService_h

#define mozilla_net_WebSocketEventService_h

#include "mozilla/AlreadyAddRefed.h"

#include "mozilla/Atomics.h"

#include "nsIWebSocketEventService.h"

#include "nsAutoPtr.h"

#include "nsCOMPtr.h"

#include "nsClassHashtable.h"

#include "nsHashKeys.h"

#include "nsIObserver.h"

#include "nsISupportsImpl.h"

#include "nsTArray.h"

namespace mozilla {

namespace net {

class WebSocketFrame;

class WebSocketEventListenerChild;

class WebSocketEventService final : public nsIWebSocketEventService

                                  , public nsIObserver

{

  friend class WebSocketBaseRunnable;

public:

  NS_DECL_ISUPPORTS

  NS_DECL_NSIOBSERVER

  NS_DECL_NSIWEBSOCKETEVENTSERVICE

  static already_AddRefed<WebSocketEventService> Get();

  static already_AddRefed<WebSocketEventService> GetOrCreate();

  void WebSocketCreated(uint32_t aWebSocketSerialID,

                        uint64_t aInnerWindowID,

                        const nsAString& aURI,

                        const nsACString& aProtocols,

                        nsIEventTarget* aTarget = nullptr);

  void WebSocketOpened(uint32_t aWebSocketSerialID,

                       uint64_t aInnerWindowID,

                       const nsAString& aEffectiveURI,

                       const nsACString& aProtocols,

                       const nsACString& aExtensions,

                       nsIEventTarget* aTarget = nullptr);

  void WebSocketMessageAvailable(uint32_t aWebSocketSerialID,

                                 uint64_t aInnerWindowID,

                                 const nsACString& aData,

                                 uint16_t aMessageType,

                                 nsIEventTarget* aTarget = nullptr);

  void WebSocketClosed(uint32_t aWebSocketSerialID,

                       uint64_t aInnerWindowID,

                       bool aWasClean,

                       uint16_t aCode,

                       const nsAString& aReason,

                       nsIEventTarget* aTarget = nullptr);

  void FrameReceived(uint32_t aWebSocketSerialID,

                     uint64_t aInnerWindowID,

                     already_AddRefed<WebSocketFrame> aFrame,

                     nsIEventTarget* aTarget = nullptr);

  void  FrameSent(uint32_t aWebSocketSerialID,

                  uint64_t aInnerWindowID,

                  already_AddRefed<WebSocketFrame> aFrame,

                  nsIEventTarget* aTarget = nullptr);

  already_AddRefed<WebSocketFrame>

  CreateFrameIfNeeded(bool aFinBit, bool aRsvBit1, bool aRsvBit2, bool aRsvBit3,

                      uint8_t aOpCode, bool aMaskBit, uint32_t aMask,

                      const nsCString& aPayload);

  already_AddRefed<WebSocketFrame>

  CreateFrameIfNeeded(bool aFinBit, bool aRsvBit1, bool aRsvBit2, bool aRsvBit3,

                      uint8_t aOpCode, bool aMaskBit, uint32_t aMask,

                      uint8_t* aPayload, uint32_t aPayloadLength);

  already_AddRefed<WebSocketFrame>

  CreateFrameIfNeeded(bool aFinBit, bool aRsvBit1, bool aRsvBit2, bool aRsvBit3,

                      uint8_t aOpCode, bool aMaskBit, uint32_t aMask,

                      uint8_t* aPayloadInHdr, uint32_t aPayloadInHdrLength,

                      uint8_t* aPayload, uint32_t aPayloadLength);

private:

  WebSocketEventService();

  ~WebSocketEventService();

  bool HasListeners() const;

  void Shutdown();

  typedef nsTArray<nsCOMPtr<nsIWebSocketEventListener>> WindowListeners;

  struct WindowListener

  {

    WindowListeners mListeners;

    RefPtr<WebSocketEventListenerChild> mActor;

  };

  void GetListeners(uint64_t aInnerWindowID,

                    WindowListeners& aListeners) const;

  void ShutdownActorListener(WindowListener* aListener);

  // Used only on the main-thread.

  nsClassHashtable<nsUint64HashKey, WindowListener> mWindows;

  Atomic<uint64_t> mCountListeners;

};

} // net namespace

} // mozilla namespace

/**

 * Casting WebSocketEventService to nsISupports is ambiguous.

 * This method handles that.

 */

inline nsISupports*

ToSupports(mozilla::net::WebSocketEventService* p)

{

  return NS_ISUPPORTS_CAST(nsIWebSocketEventService*, p);

}

#endif // mozilla_net_WebSocketEventService_h