chrome/browser/extensions/api/sync_file_system/extension_sync_event_observer.h

   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 "extensions/browser/browser_context_keyed_api_factory.h"
  14
  15 namespace content {
  16 class BrowserContext;
  17 }
  18
  19 namespace sync_file_system {
  20 class SyncFileSystemService;
  21 }
  22
  23 namespace extensions {
  24
  25 // Observes changes in SyncFileSystem and relays events to JS Extension API.
  26 class ExtensionSyncEventObserver : public sync_file_system::SyncEventObserver,
  27                                    public BrowserContextKeyedAPI {
  28  public:
  29   static BrowserContextKeyedAPIFactory<ExtensionSyncEventObserver>*
  30       GetFactoryInstance();
  31
  32   explicit ExtensionSyncEventObserver(content::BrowserContext* context);
  33   virtual ~ExtensionSyncEventObserver();
  34
  35   void InitializeForService(
  36       sync_file_system::SyncFileSystemService* sync_service);
  37
  38   // KeyedService override.
  39   virtual void Shutdown() OVERRIDE;
  40
  41   // sync_file_system::SyncEventObserver interface implementation.
  42   virtual void OnSyncStateUpdated(
  43       const GURL& app_origin,
  44       sync_file_system::SyncServiceState state,
  45       const std::string& description) OVERRIDE;
  46
  47   virtual void OnFileSynced(
  48       const fileapi::FileSystemURL& url,
  49       sync_file_system::SyncFileStatus status,
  50       sync_file_system::SyncAction action,
  51       sync_file_system::SyncDirection direction) OVERRIDE;
  52
  53  private:
  54   friend class BrowserContextKeyedAPIFactory<ExtensionSyncEventObserver>;
  55
  56   // Returns an empty string if the extension |app_origin| cannot be found
  57   // in the installed extension list.
  58   std::string GetExtensionId(const GURL& app_origin);
  59
  60   // BrowserContextKeyedAPI implementation.
  61   static const char* service_name() { return "ExtensionSyncEventObserver"; }
  62   static const bool kServiceIsCreatedWithBrowserContext = false;
  63
  64   content::BrowserContext* browser_context_;
  65
  66   // Not owned. If not null, then this is registered to SyncFileSystemService.
  67   sync_file_system::SyncFileSystemService* sync_service_;
  68
  69   void BroadcastOrDispatchEvent(const GURL& app_origin,
  70                                 const std::string& event_name,
  71                                 scoped_ptr<base::ListValue> value);
  72
  73   DISALLOW_COPY_AND_ASSIGN(ExtensionSyncEventObserver);
  74 };
  75
  76 template <>
  77 void BrowserContextKeyedAPIFactory<
  78     ExtensionSyncEventObserver>::DeclareFactoryDependencies();
  79
  80 }  // namespace extensions
  81
  82 #endif  // CHROME_BROWSER_EXTENSIONS_API_SYNC_FILE_SYSTEM_EXTENSION_SYNC_EVENT_OBSERVER_H_