// Copyright (c) 2011 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.
// This class simulates a slow download.  This used in a UI test to test the
// download manager.  Requests to |kUnknownSizeUrl| and |kKnownSizeUrl| start
// downloads that pause after the first chunk of data is delivered.
// A later request to |kFinishDownloadUrl| will finish these downloads.
// A later request to |kErrorFinishDownloadUrl| will cause these
// downloads to error with |net::ERR_FAILED|.
// TODO(rdsmith): Update to allow control of returned error.

#ifndef CONTENT_BROWSER_NET_URL_REQUEST_SLOW_DOWNLOAD_JOB_H_
#define CONTENT_BROWSER_NET_URL_REQUEST_SLOW_DOWNLOAD_JOB_H_
#pragma once

#include <string>
#include <vector>

#include "base/task.h"
#include "net/url_request/url_request_job.h"

class URLRequestSlowDownloadJob : public net::URLRequestJob {
 public:
  explicit URLRequestSlowDownloadJob(net::URLRequest* request);

  // Timer callback, used to check to see if we should finish our download and
  // send the second chunk.
  void CheckDoneStatus();

  // net::URLRequestJob methods
  virtual void Start();
  virtual bool GetMimeType(std::string* mime_type) const;
  virtual void GetResponseInfo(net::HttpResponseInfo* info);
  virtual bool ReadRawData(net::IOBuffer* buf, int buf_size, int *bytes_read);

  static net::URLRequestJob* Factory(net::URLRequest* request,
                                     const std::string& scheme);

  // Test URLs.
  static const char kUnknownSizeUrl[];
  static const char kKnownSizeUrl[];
  static const char kFinishDownloadUrl[];
  static const char kErrorFinishDownloadUrl[];

  // Adds the testing URLs to the net::URLRequestFilter.
  static void AddUrlHandler();

 private:
  virtual ~URLRequestSlowDownloadJob();

  void GetResponseInfoConst(net::HttpResponseInfo* info) const;

  // Mark all pending requests to be finished.  We keep track of pending
  // requests in |pending_requests_|.
  static void FinishPendingRequests(bool error);
  static std::vector<URLRequestSlowDownloadJob*> pending_requests_;

  void StartAsync();

  void set_should_finish_download() { should_finish_download_ = true; }
  void set_should_error_download() { should_error_download_ = true; }

  int first_download_size_remaining_;
  bool should_finish_download_;
  bool should_send_second_chunk_;
  bool should_error_download_;

  ScopedRunnableMethodFactory<URLRequestSlowDownloadJob> method_factory_;
};

#endif  // CONTENT_BROWSER_NET_URL_REQUEST_SLOW_DOWNLOAD_JOB_H_