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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef PPAPI_UTILITY_WEBSOCKET_WEBSOCKET_API_H_
#define PPAPI_UTILITY_WEBSOCKET_WEBSOCKET_API_H_
#include <stdint.h>
#include "ppapi/c/ppb_websocket.h"
/// @file
/// This file defines the WebSocketAPI interface.
namespace pp {
class CompletionCallback;
class Instance;
class Var;
/// The <code>WebSocketAPI</code> class
class WebSocketAPI {
public:
/// Constructs a WebSocketAPI object.
explicit WebSocketAPI(Instance* instance);
/// Destructs a WebSocketAPI object.
virtual ~WebSocketAPI();
/// Connect() connects to the specified WebSocket server. Caller can call
/// this method at most once.
///
/// @param[in] url A <code>Var</code> of string type representing a WebSocket
/// server URL.
/// @param[in] protocols A pointer to an array of string type
/// <code>Var</code> specifying sub-protocols. Each <code>Var</code>
/// represents one sub-protocol and its <code>PP_VarType</code> must be
/// <code>PP_VARTYPE_STRING</code>. This argument can be null only if
/// <code>protocol_count</code> is 0.
/// @param[in] protocol_count The number of sub-protocols in
/// <code>protocols</code>.
///
/// @return An int32_t containing an error code from
/// <code>pp_errors.h</code>.
/// See also <code>pp::WebSocket::Connect</code>.
int32_t Connect(const Var& url, const Var protocols[],
uint32_t protocol_count);
/// Close() closes the specified WebSocket connection by specifying
/// <code>code</code> and <code>reason</code>.
///
/// @param[in] code The WebSocket close code. Ignored if it is 0.
/// @param[in] reason A <code>Var</code> of string type which represents the
/// WebSocket close reason. Ignored if it is undefined type.
///
/// @return An int32_t containing an error code from
/// <code>pp_errors.h</code>.
/// See also <code>pp::WebSocket::Close</code>.
int32_t Close(uint16_t code, const Var& reason);
/// Send() sends a message to the WebSocket server.
///
/// @param[in] data A message to send. The message is copied to internal
/// buffer. So caller can free <code>data</code> safely after returning
/// from the function.
///
/// @return An int32_t containing an error code from
/// <code>pp_errors.h</code>.
/// See also <code>pp::WebSocket::SendMessage</code>.
int32_t Send(const Var& data);
/// GetBufferedAmount() returns the number of bytes of text and binary
/// messages that have been queued for the WebSocket connection to send but
/// have not been transmitted to the network yet.
///
/// @return Returns the number of bytes.
uint64_t GetBufferedAmount();
/// GetExtensions() returns the extensions selected by the server for the
/// specified WebSocket connection.
///
/// @return Returns a <code>Var</code> of string type. If called before the
/// connection is established, its data is empty string.
/// Currently its data is always an empty string.
Var GetExtensions();
/// GetProtocol() returns the sub-protocol chosen by the server for the
/// specified WebSocket connection.
///
/// @return Returns a <code>Var</code> of string type. If called before the
/// connection is established, it contains the empty string.
Var GetProtocol();
/// GetReadyState() returns the ready state of the specified WebSocket
/// connection.
///
/// @return Returns <code>PP_WEBSOCKETREADYSTATE_INVALID</code> if called
/// before connect() is called.
PP_WebSocketReadyState GetReadyState();
/// GetURL() returns the URL associated with specified WebSocket connection.
///
/// @return Returns a <code>Var</code> of string type. If called before the
/// connection is established, it contains the empty string.
Var GetURL();
/// WebSocketDidOpen() is invoked when the connection is established by
/// Connect().
virtual void WebSocketDidOpen() = 0;
/// WebSocketDidClose() is invoked when the connection is closed by errors or
/// Close().
virtual void WebSocketDidClose(bool wasClean,
uint16_t code,
const Var& reason) = 0;
/// HandleWebSocketMessage() is invoked when a message is received.
virtual void HandleWebSocketMessage(const Var& message) = 0;
/// HandleWebSocketError() is invoked if the user agent was required to fail
/// the WebSocket connection or the WebSocket connection is closed with
/// prejudice. DidClose() always follows HandleError().
virtual void HandleWebSocketError() = 0;
private:
class Implement;
Implement* impl_;
};
} // namespace pp
#endif // PPAPI_UTILITY_WEBSOCKET_WEBSOCKET_API_H_
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