Added implementation of SyncEventObserver to route events to Javascript Extension.

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

+// 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.
+
+#include "chrome/browser/extensions/api/sync_file_system/extension_sync_event_observer.h"

[kinuko, 2012/11/28 11:06:40]

nit: please insert one empty line after this

[calvinlo, 2012/11/28 12:26:34]

Done.

+#include "chrome/browser/extensions/event_names.h"
+#include "chrome/browser/extensions/event_router.h"
+#include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/extensions/extension_system.h"
+#include "chrome/browser/sync_file_system/sync_event_observer.h"
+#include "chrome/common/extensions/api/sync_file_system.h"
+#include "webkit/fileapi/file_system_url.h"
+#include "webkit/fileapi/syncable/sync_operation_type.h"
+
+using sync_file_system::SyncEventObserver;
+
+namespace extensions {
+
+namespace {
+
+api::sync_file_system::SyncStateStatus SyncServiceStateEnumToExtensionEnum(
+    SyncEventObserver::SyncServiceState state) {
+  switch(state) {
+    case SyncEventObserver::SYNC_SERVICE_RUNNING:
+      return api::sync_file_system::SYNC_FILE_SYSTEM_SYNC_STATE_STATUS_RUNNING;
+    case SyncEventObserver::SYNC_SERVICE_AUTHENTICATION_REQUIRED:
+      return api::sync_file_system::
+          SYNC_FILE_SYSTEM_SYNC_STATE_STATUS_AUTHENTICATION_REQUIRED;
+    case SyncEventObserver::SYNC_SERVICE_TEMPORARY_UNAVAILABLE:
+      return api::sync_file_system::
+          SYNC_FILE_SYSTEM_SYNC_STATE_STATUS_TEMPORARY_UNAVAILABLE;
+    case SyncEventObserver::SYNC_SERVICE_DISABLED:
+      return api::sync_file_system::SYNC_FILE_SYSTEM_SYNC_STATE_STATUS_DISABLED;
+  }
+  NOTREACHED();
+  return api::sync_file_system::SYNC_FILE_SYSTEM_SYNC_STATE_STATUS_NONE;
+}
+
+api::sync_file_system::SyncOperationType SyncOperationTypeToExtensionEnum(
+    fileapi::SyncOperationType operation_type) {
+  switch(operation_type) {
+    case fileapi::SYNC_OPERATION_NONE:
+      return api::sync_file_system::
+          SYNC_FILE_SYSTEM_SYNC_OPERATION_TYPE_NONE;
+    case fileapi::SYNC_OPERATION_ADD:
+      return api::sync_file_system::
+          SYNC_FILE_SYSTEM_SYNC_OPERATION_TYPE_FILE_ADDED;
+    case fileapi::SYNC_OPERATION_UPDATE:
+      return api::sync_file_system::
+          SYNC_FILE_SYSTEM_SYNC_OPERATION_TYPE_FILE_UPDATED;
+    case fileapi::SYNC_OPERATION_DELETE:
+      return api::sync_file_system::
+          SYNC_FILE_SYSTEM_SYNC_OPERATION_TYPE_FILE_DELETED;
+  }
+  NOTREACHED();
+  return api::sync_file_system::SYNC_FILE_SYSTEM_SYNC_OPERATION_TYPE_NONE;
+}
+
+}  // namespace
+
+ExtensionSyncEventObserver::ExtensionSyncEventObserver(
+    Profile* profile,
+    const std::string& service_name)
+    : profile_(profile),
+      service_name_(service_name) {}
+
+const std::string ExtensionSyncEventObserver::GetExtensionId(

[kinuko, 2012/11/28 11:06:40]

you probably meant const std::string& ? (as Extension::id() returns const ref)

[calvinlo, 2012/11/28 12:26:34]

Done.

+    const GURL& app_origin) {
+  const Extension* app = ExtensionSystem::Get(profile_)->extension_service()->
+      GetInstalledApp(app_origin);
+  DCHECK(app);
+  return app->id();
+}
+
+void ExtensionSyncEventObserver::OnSyncStateUpdated(
+    const GURL& app_origin,
+    sync_file_system::SyncEventObserver::SyncServiceState state,
+    const std::string& description) {
+  // TODO(calvinlo): Check extension in set of extension_ids that are listening
+  // for events. If extension_id is not in the set, then ignore the event.
+  const std::string extension_id = GetExtensionId(app_origin);
+
+  // Convert state and description into SyncState Object
+  api::sync_file_system::SyncState sync_state;
+  sync_state.service_name = service_name_;
+  sync_state.state = SyncServiceStateEnumToExtensionEnum(state);
+  sync_state.description = description;
+  scoped_ptr<base::ListValue> params(
+      api::sync_file_system::OnSyncStateChanged::Create(sync_state));
+
+  // Dispatch the event to the extension
+  ExtensionSystem::Get(profile_)->event_router()->DispatchEventToExtension(
+      extension_id, event_names::kOnSyncStateChanged, params.Pass(),
+      profile_, GURL());
+}
+
+void ExtensionSyncEventObserver::OnFileSynced(
+    fileapi::SyncOperationType operation,
+    const fileapi::FileSystemURL& url) {
+    const std::string extension_id = GetExtensionId(url.origin());
+
+  // TODO(calvinlo):Convert filePath from string to Webkit FileEntry.
+  const api::sync_file_system::SyncOperationType sync_operation_type =
+      SyncOperationTypeToExtensionEnum(operation);
+  const std::string filePath = url.virtual_path().MaybeAsASCII();
+  scoped_ptr<base::ListValue> params(
+      api::sync_file_system::OnFileSynced::Create(filePath,
+                                                  sync_operation_type));
+
+  // Dispatch the event to the extension
+  ExtensionSystem::Get(profile_)->event_router()->DispatchEventToExtension(
+      extension_id, event_names::kOnFileSynced, params.Pass(),
+      profile_, GURL());
+}
+
+}  // namespace extensions