// Copyright 2014 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_NOTIFICATIONS_PLATFORM_NOTIFICATION_SERVICE_IMPL_H_
#define CHROME_BROWSER_NOTIFICATIONS_PLATFORM_NOTIFICATION_SERVICE_IMPL_H_

#include <stdint.h>
#include <map>
#include <set>
#include <string>

#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "base/memory/singleton.h"
#include "base/strings/string16.h"
#include "chrome/browser/notifications/notification.h"
#include "content/public/browser/platform_notification_service.h"
#include "content/public/common/persistent_notification_status.h"

class NotificationDelegate;
class NotificationUIManager;
class Profile;

namespace content {
class BrowserContext;
}

namespace gcm {
class PushMessagingBrowserTest;
}

// The platform notification service is the profile-agnostic entry point through
// which Web Notifications can be controlled.
class PlatformNotificationServiceImpl
    : public content::PlatformNotificationService {
 public:
  // Returns the active instance of the service in the browser process. Safe to
  // be called from any thread.
  static PlatformNotificationServiceImpl* GetInstance();

  // To be called when a persistent notification has been clicked on. The
  // Service Worker associated with the registration will be started if
  // needed, on which the event will be fired. Must be called on the UI thread.
  void OnPersistentNotificationClick(
      content::BrowserContext* browser_context,
      int64_t persistent_notification_id,
      const GURL& origin,
      int action_index);

  // To be called when a persistent notification has been closed. The data
  // associated with the notification has to be pruned from the database in this
  // case, to make sure that it continues to be in sync. Must be called on the
  // UI thread.
  void OnPersistentNotificationClose(
      content::BrowserContext* browser_context,
      int64_t persistent_notification_id,
      const GURL& origin,
      bool by_user) const;

  // Returns the Notification UI Manager through which notifications can be
  // displayed to the user. Can be overridden for testing.
  NotificationUIManager* GetNotificationUIManager() const;

  // Open the Notification settings screen when clicking the right button.
  void OpenNotificationSettings(content::BrowserContext* browser_context);

  // content::PlatformNotificationService implementation.
  blink::WebNotificationPermission CheckPermissionOnUIThread(
      content::BrowserContext* browser_context,
      const GURL& origin,
      int render_process_id) override;
  blink::WebNotificationPermission CheckPermissionOnIOThread(
      content::ResourceContext* resource_context,
      const GURL& origin,
      int render_process_id) override;
  void DisplayNotification(
      content::BrowserContext* browser_context,
      const GURL& origin,
      const SkBitmap& icon,
      const content::PlatformNotificationData& notification_data,
      scoped_ptr<content::DesktopNotificationDelegate> delegate,
      base::Closure* cancel_callback) override;
  void DisplayPersistentNotification(
      content::BrowserContext* browser_context,
      int64_t persistent_notification_id,
      const GURL& origin,
      const SkBitmap& icon,
      const content::PlatformNotificationData& notification_data) override;
  void ClosePersistentNotification(
      content::BrowserContext* browser_context,
      int64_t persistent_notification_id) override;
  bool GetDisplayedPersistentNotifications(
      content::BrowserContext* browser_context,
      std::set<std::string>* displayed_notifications) override;

 private:
  friend struct base::DefaultSingletonTraits<PlatformNotificationServiceImpl>;
  friend class PlatformNotificationServiceBrowserTest;
  friend class PlatformNotificationServiceTest;
  friend class PushMessagingBrowserTest;
  FRIEND_TEST_ALL_PREFIXES(PlatformNotificationServiceTest,
                           CreateNotificationFromData);
  FRIEND_TEST_ALL_PREFIXES(PlatformNotificationServiceTest,
                           DisplayNameForContextMessage);

  PlatformNotificationServiceImpl();
  ~PlatformNotificationServiceImpl() override;

  // Creates a new Web Notification-based Notification object.
  // TODO(peter): |delegate| can be a scoped_refptr, but properly passing this
  // through requires changing a whole lot of Notification constructor calls.
  Notification CreateNotificationFromData(
      Profile* profile,
      const GURL& origin,
      const SkBitmap& icon,
      const content::PlatformNotificationData& notification_data,
      NotificationDelegate* delegate) const;

  // Overrides the Notification UI Manager to use to |manager|. Only to be
  // used by tests. Tests are responsible for cleaning up after themselves.
  void SetNotificationUIManagerForTesting(NotificationUIManager* manager);

  // Returns a display name for an origin, to be used in the context message
  base::string16 DisplayNameForContextMessage(Profile* profile,
                                              const GURL& origin) const;

  // Weak reference. Ownership maintains with the test.
  NotificationUIManager* notification_ui_manager_for_tests_;

  // Mapping between a persistent notification id and the id of the associated
  // message_center::Notification object. Must only be used on the UI thread.
  std::map<int64_t, std::string> persistent_notifications_;

  DISALLOW_COPY_AND_ASSIGN(PlatformNotificationServiceImpl);
};

#endif  // CHROME_BROWSER_NOTIFICATIONS_PLATFORM_NOTIFICATION_SERVICE_IMPL_H_