// 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 CHROME_BROWSER_UI_MEDIA_STREAM_INFOBAR_DELEGATE_H_
#define CHROME_BROWSER_UI_MEDIA_STREAM_INFOBAR_DELEGATE_H_

#include <string>

#include "base/callback.h"
#include "base/compiler_specific.h"
#include "chrome/browser/infobars/infobar_delegate.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/common/media_stream_request.h"

class MessageLoop;
class TabContents;

// This class configures an infobar shown when a page requests access to a
// user's microphone and/or video camera.  The user is shown a message asking
// which audio and/or video devices he wishes to use with the current page, and
// buttons to give access to the selected devices to the page, or to deny access
// to them.
class MediaStreamInfoBarDelegate : public InfoBarDelegate {
 public:
  MediaStreamInfoBarDelegate(
      InfoBarTabHelper* tab_helper,
      const content::MediaStreamRequest* request,
      const content::MediaResponseCallback& callback);

  virtual ~MediaStreamInfoBarDelegate();

  // These tell whether the user has to select audio and/or video devices.
  bool has_audio() const { return has_audio_; }
  bool has_video() const { return has_video_; }

  // Returns lists of audio and/or video devices from which the user will have
  // to choose.
  content::MediaStreamDevices GetAudioDevices() const;
  content::MediaStreamDevices GetVideoDevices() const;

  // Returns the security origin (e.g. "www.html5rocks.com") at the origin
  // of this request.
  const GURL& GetSecurityOrigin() const;

  // Callbacks to handle accepting devices or denying the request. |audio_id|
  // and |video_id| are the device IDs of the accepted audio and video devices.
  // The |audio_id| or |video_id| values are ignored if the request did not ask
  // for audio or video devices respectively.
  void Accept(const std::string& audio_id, const std::string& video_id);
  void Deny();

 private:
  // Finds a device in the current request with the specified |id| and |type|,
  // and adds it to the |devices| array.
  void AddDeviceWithId(content::MediaStreamDeviceType type,
                       const std::string& id,
                       content::MediaStreamDevices* devices);

  // InfoBarDelegate:
  virtual InfoBar* CreateInfoBar(InfoBarTabHelper* owner) OVERRIDE;
  virtual void InfoBarDismissed() OVERRIDE;
  virtual gfx::Image* GetIcon() const OVERRIDE;
  virtual Type GetInfoBarType() const OVERRIDE;
  virtual MediaStreamInfoBarDelegate* AsMediaStreamInfoBarDelegate() OVERRIDE;

  // The original request for access to devices.
  const content::MediaStreamRequest* request_;

  // The callback that needs to be Run to notify WebRTC of whether access to
  // audio/video devices was granted or not.
  content::MediaResponseCallback callback_;

  // Whether the request is for audio and/or video devices.
  bool has_audio_;
  bool has_video_;

  DISALLOW_COPY_AND_ASSIGN(MediaStreamInfoBarDelegate);
};

#endif  // CHROME_BROWSER_UI_MEDIA_STREAM_INFOBAR_DELEGATE_H_