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 #include "extensions/browser/extension_event_histogram_value.h"
  15
  16 namespace content {
  17 class BrowserContext;
  18 }
  19
  20 namespace sync_file_system {
  21 class SyncFileSystemService;
  22 }
  23
  24 namespace extensions {
  25
  26 // Observes changes in SyncFileSystem and relays events to JS Extension API.
  27 class ExtensionSyncEventObserver : public sync_file_system::SyncEventObserver,
  28                                    public BrowserContextKeyedAPI {
  29  public:
  30   static BrowserContextKeyedAPIFactory<ExtensionSyncEventObserver>*
  31       GetFactoryInstance();
  32
  33   explicit ExtensionSyncEventObserver(content::BrowserContext* context);
  34   ~ExtensionSyncEventObserver() override;
  35
  36   void InitializeForService(
  37       sync_file_system::SyncFileSystemService* sync_service);
  38
  39   // KeyedService override.
  40   void Shutdown() override;
  41
  42   // sync_file_system::SyncEventObserver interface implementation.
  43   void OnSyncStateUpdated(const GURL& app_origin,
  44                           sync_file_system::SyncServiceState state,
  45                           const std::string& description) override;
  46
  47   void OnFileSynced(const storage::FileSystemURL& url,
  48                     sync_file_system::SyncFileType file_type,
  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                                 events::HistogramValue histogram_value,
  71                                 const std::string& event_name,
  72                                 scoped_ptr<base::ListValue> value);
  73
  74   DISALLOW_COPY_AND_ASSIGN(ExtensionSyncEventObserver);
  75 };
  76
  77 template <>
  78 void BrowserContextKeyedAPIFactory<
  79     ExtensionSyncEventObserver>::DeclareFactoryDependencies();
  80
  81 }  // namespace extensions
  82
  83 #endif  // CHROME_BROWSER_EXTENSIONS_API_SYNC_FILE_SYSTEM_EXTENSION_SYNC_EVENT_OBSERVER_H_