text: // 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_DOWNLOAD_DOWNLOAD_SERVICE_H_
  #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_H_
  
  #include <memory>
  
  #include "base/macros.h"
  #include "components/keyed_service/core/keyed_service.h"
  
  class ChromeDownloadManagerDelegate;
  class DownloadHistory;
  class ExtensionDownloadsEventRouter;
  class Profile;
  
  namespace content {
  class DownloadManager;
  }
  
  namespace extensions {
  class ExtensionDownloadsEventRouter;
  }
  
  // Abstract base class for the download service; see DownloadServiceImpl for
  // implementation.
  class DownloadService : public KeyedService {
   public:
    DownloadService();
    ~DownloadService() override;
  
    // Get the download manager delegate, creating it if it doesn't already exist.
    virtual ChromeDownloadManagerDelegate* GetDownloadManagerDelegate() = 0;
  
    // Get the interface to the history system. Returns NULL if profile is
    // incognito or if the DownloadManager hasn't been created yet or if there is
    // no HistoryService for profile. Virtual for testing.
    virtual DownloadHistory* GetDownloadHistory() = 0;
  
  #if defined(ENABLE_EXTENSIONS)
    virtual extensions::ExtensionDownloadsEventRouter*
    GetExtensionEventRouter() = 0;
  #endif
  
    // Has a download manager been created?
    virtual bool HasCreatedDownloadManager() = 0;
  
    // Number of non-malicious downloads associated with this instance of the
    // service.
    virtual int NonMaliciousDownloadCount() const = 0;
  
    // Cancels all in-progress downloads for this profile.
    virtual void CancelDownloads() = 0;
  
    // Number of non-malicious downloads associated with all profiles.
    static int NonMaliciousDownloadCountAllProfiles();
  
    // Cancels all in-progress downloads for all profiles.
    static void CancelAllDownloads();
  
    // Sets the DownloadManagerDelegate associated with this object and
    // its DownloadManager.  Takes ownership of |delegate|, and destroys
    // the previous delegate.  For testing.
    virtual void SetDownloadManagerDelegateForTesting(
        std::unique_ptr<ChromeDownloadManagerDelegate> delegate) = 0;
  
    // Returns false if at least one extension has disabled the shelf, true
    // otherwise.
    virtual bool IsShelfEnabled() = 0;
  
   private:
    DISALLOW_COPY_AND_ASSIGN(DownloadService);
  };
  
  #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_H_
  