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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_EXTENSIONS_API_SYNC_FILE_SYSTEM_EXTENSION_SYNC_EVENT_OBSERVER_H_
      6 #define CHROME_BROWSER_EXTENSIONS_API_SYNC_FILE_SYSTEM_EXTENSION_SYNC_EVENT_OBSERVER_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/compiler_specific.h"
     10 #include "base/memory/scoped_ptr.h"
     11 #include "base/values.h"
     12 #include "chrome/browser/sync_file_system/sync_event_observer.h"
     13 #include "components/browser_context_keyed_service/browser_context_keyed_service.h"
     14 
     15 class Profile;
     16 
     17 namespace sync_file_system {
     18 class SyncFileSystemService;
     19 }
     20 
     21 namespace extensions {
     22 
     23 // Observes changes in SyncFileSystem and relays events to JS Extension API.
     24 class ExtensionSyncEventObserver
     25     : public sync_file_system::SyncEventObserver,
     26       public BrowserContextKeyedService {
     27  public:
     28   explicit ExtensionSyncEventObserver(Profile* profile);
     29   virtual ~ExtensionSyncEventObserver();
     30 
     31   void InitializeForService(
     32       sync_file_system::SyncFileSystemService* sync_service);
     33 
     34   // BrowserContextKeyedService override.
     35   virtual void Shutdown() OVERRIDE;
     36 
     37   // sync_file_system::SyncEventObserver interface implementation.
     38   virtual void OnSyncStateUpdated(
     39       const GURL& app_origin,
     40       sync_file_system::SyncServiceState state,
     41       const std::string& description) OVERRIDE;
     42 
     43   virtual void OnFileSynced(
     44       const fileapi::FileSystemURL& url,
     45       sync_file_system::SyncFileStatus status,
     46       sync_file_system::SyncAction action,
     47       sync_file_system::SyncDirection direction) OVERRIDE;
     48 
     49  private:
     50   // Returns an empty string if the extension |app_origin| cannot be found
     51   // in the installed extension list.
     52   std::string GetExtensionId(const GURL& app_origin);
     53 
     54   Profile* profile_;
     55 
     56   // Not owned. If not null, then this is registered to SyncFileSystemService.
     57   sync_file_system::SyncFileSystemService* sync_service_;
     58 
     59   void BroadcastOrDispatchEvent(const GURL& app_origin,
     60                                 const std::string& event_name,
     61                                 scoped_ptr<base::ListValue> value);
     62 
     63   DISALLOW_COPY_AND_ASSIGN(ExtensionSyncEventObserver);
     64 };
     65 
     66 }  // namespace extensions
     67 
     68 #endif  // CHROME_BROWSER_EXTENSIONS_API_SYNC_FILE_SYSTEM_EXTENSION_SYNC_EVENT_OBSERVER_H_
     69