chrome/browser/chromeos/extensions/file_manager/event_router.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_CHROMEOS_EXTENSIONS_FILE_MANAGER_EVENT_ROUTER_H_
   6 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_EVENT_ROUTER_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/basictypes.h"
  13 #include "base/compiler_specific.h"
  14 #include "base/files/file_path_watcher.h"
  15 #include "base/memory/scoped_ptr.h"
  16 #include "chrome/browser/chromeos/drive/drive_integration_service.h"
  17 #include "chrome/browser/chromeos/drive/file_system_observer.h"
  18 #include "chrome/browser/chromeos/drive/job_list.h"
  19 #include "chrome/browser/chromeos/drive/sync_client.h"
  20 #include "chrome/browser/chromeos/file_manager/file_watcher.h"
  21 #include "chrome/browser/chromeos/file_manager/fileapi_util.h"
  22 #include "chrome/browser/chromeos/file_manager/volume_manager.h"
  23 #include "chrome/browser/chromeos/file_manager/volume_manager_observer.h"
  24 #include "chrome/browser/drive/drive_service_interface.h"
  25 #include "chrome/common/extensions/api/file_manager_private.h"
  26 #include "chromeos/disks/disk_mount_manager.h"
  27 #include "chromeos/network/network_state_handler_observer.h"
  28 #include "components/keyed_service/core/keyed_service.h"
  29 #include "storage/browser/fileapi/file_system_operation.h"
  30
  31 class PrefChangeRegistrar;
  32 class Profile;
  33
  34 using file_manager::util::EntryDefinition;
  35
  36 namespace base {
  37 class ListValue;
  38 }
  39
  40 namespace chromeos {
  41 class NetworkState;
  42 }
  43
  44 namespace drive {
  45 class FileChange;
  46 }
  47
  48 namespace file_manager {
  49 class DeviceEventRouter;
  50
  51 // Monitors changes in disk mounts, network connection state and preferences
  52 // affecting File Manager. Dispatches appropriate File Browser events.
  53 class EventRouter : public KeyedService,
  54                     public chromeos::NetworkStateHandlerObserver,
  55                     public drive::FileSystemObserver,
  56                     public drive::JobListObserver,
  57                     public drive::DriveServiceObserver,
  58                     public VolumeManagerObserver,
  59                     public content::NotificationObserver {
  60  public:
  61   typedef base::Callback<void(const base::FilePath& virtual_path,
  62                               const drive::FileChange* list,
  63                               bool got_error,
  64                               const std::vector<std::string>& extension_ids)>
  65       DispatchDirectoryChangeEventImplCallback;
  66
  67   explicit EventRouter(Profile* profile);
  68   ~EventRouter() override;
  69
  70   // KeyedService overrides.
  71   void Shutdown() override;
  72
  73   typedef base::Callback<void(bool success)> BoolCallback;
  74
  75   // Adds a file watch at |local_path|, associated with |virtual_path|, for
  76   // an extension with |extension_id|.
  77   //
  78   // |callback| will be called with true on success, or false on failure.
  79   // |callback| must not be null.
  80   //
  81   // Obsolete. Used as fallback for files which backends do not implement the
  82   // storage::WatcherManager interface.
  83   void AddFileWatch(const base::FilePath& local_path,
  84                     const base::FilePath& virtual_path,
  85                     const std::string& extension_id,
  86                     const BoolCallback& callback);
  87
  88   // Removes a file watch at |local_path| for an extension with |extension_id|.
  89   //
  90   // Obsolete. Used as fallback for files which backends do not implement the
  91   // storage::WatcherManager interface.
  92   void RemoveFileWatch(const base::FilePath& local_path,
  93                        const std::string& extension_id);
  94
  95   // Called when a copy task is completed.
  96   void OnCopyCompleted(
  97       int copy_id, const GURL& source_url, const GURL& destination_url,
  98       base::File::Error error);
  99
 100   // Called when a copy task progress is updated.
 101   void OnCopyProgress(int copy_id,
 102                       storage::FileSystemOperation::CopyProgressType type,
 103                       const GURL& source_url,
 104                       const GURL& destination_url,
 105                       int64 size);
 106
 107   // Called when a notification from a watcher manager arrives.
 108   void OnWatcherManagerNotification(
 109       const storage::FileSystemURL& file_system_url,
 110       const std::string& extension_id,
 111       storage::WatcherManager::ChangeType change_type);
 112
 113   // chromeos::NetworkStateHandlerObserver overrides.
 114   void DefaultNetworkChanged(const chromeos::NetworkState* network) override;
 115
 116   // drive::JobListObserver overrides.
 117   void OnJobAdded(const drive::JobInfo& job_info) override;
 118   void OnJobUpdated(const drive::JobInfo& job_info) override;
 119   void OnJobDone(const drive::JobInfo& job_info,
 120                  drive::FileError error) override;
 121
 122   // drive::DriveServiceObserver overrides.
 123   void OnRefreshTokenInvalid() override;
 124   void OnReadyToSendRequests() override;
 125
 126   // drive::FileSystemObserver overrides.
 127   void OnDirectoryChanged(const base::FilePath& drive_path) override;
 128   void OnFileChanged(const drive::FileChange& changed_files) override;
 129   void OnDriveSyncError(drive::file_system::DriveSyncErrorType type,
 130                         const base::FilePath& drive_path) override;
 131
 132   // VolumeManagerObserver overrides.
 133   void OnDiskAdded(const chromeos::disks::DiskMountManager::Disk& disk,
 134                    bool mounting) override;
 135   void OnDiskRemoved(
 136       const chromeos::disks::DiskMountManager::Disk& disk) override;
 137   void OnDeviceAdded(const std::string& device_path) override;
 138   void OnDeviceRemoved(const std::string& device_path) override;
 139   void OnVolumeMounted(chromeos::MountError error_code,
 140                        const VolumeInfo& volume_info) override;
 141   void OnVolumeUnmounted(chromeos::MountError error_code,
 142                          const VolumeInfo& volume_info) override;
 143   void OnFormatStarted(const std::string& device_path, bool success) override;
 144   void OnFormatCompleted(const std::string& device_path, bool success) override;
 145
 146   // content::NotificationObserver overrides.
 147   void Observe(int type,
 148                const content::NotificationSource& source,
 149                const content::NotificationDetails& details) override;
 150
 151   // Set custom dispatch directory change event implementation for testing.
 152   void SetDispatchDirectoryChangeEventImplForTesting(
 153       const DispatchDirectoryChangeEventImplCallback& callback);
 154
 155   // Returns a weak pointer for the event router.
 156   base::WeakPtr<EventRouter> GetWeakPtr();
 157
 158  private:
 159   typedef std::map<base::FilePath, FileWatcher*> WatcherMap;
 160
 161   // Starts observing file system change events.
 162   void ObserveEvents();
 163
 164   // Called when prefs related to file manager change.
 165   void OnFileManagerPrefsChanged();
 166
 167   // Process file watch notifications.
 168   void HandleFileWatchNotification(const drive::FileChange* list,
 169                                    const base::FilePath& path,
 170                                    bool got_error);
 171
 172   // Sends directory change event.
 173   void DispatchDirectoryChangeEvent(
 174       const base::FilePath& path,
 175       const drive::FileChange* list,
 176       bool got_error,
 177       const std::vector<std::string>& extension_ids);
 178
 179   // Default implementation of DispatchDirectoryChangeEvent.
 180   void DispatchDirectoryChangeEventImpl(
 181       const base::FilePath& path,
 182       const drive::FileChange* list,
 183       bool got_error,
 184       const std::vector<std::string>& extension_ids);
 185
 186   // Sends directory change event, after converting the file definition to entry
 187   // definition.
 188   void DispatchDirectoryChangeEventWithEntryDefinition(
 189       const linked_ptr<drive::FileChange> list,
 190       const std::string* extension_id,
 191       bool watcher_error,
 192       const EntryDefinition& entry_definition);
 193
 194   // Dispatches the mount completed event.
 195   void DispatchMountCompletedEvent(
 196       extensions::api::file_manager_private::MountCompletedEventType event_type,
 197       chromeos::MountError error,
 198       const VolumeInfo& volume_info);
 199
 200   // If needed, opens a file manager window for the removable device mounted at
 201   // |mount_path|. Disk.mount_path() is empty, since it is being filled out
 202   // after calling notifying observers by DiskMountManager.
 203   void ShowRemovableDeviceInFileManager(VolumeType type,
 204                                         const base::FilePath& mount_path);
 205
 206   // Manages the list of currently active Drive file transfer jobs.
 207   struct DriveJobInfoWithStatus {
 208     DriveJobInfoWithStatus();
 209     DriveJobInfoWithStatus(const drive::JobInfo& info,
 210                            const std::string& status);
 211     drive::JobInfo job_info;
 212     std::string status;
 213   };
 214
 215   // Sends onFileTransferUpdate event right now if |immediate| is set. Otherwise
 216   // it refrains from sending for a short while, and after that it sends the
 217   // most recently scheduled event once.
 218   // The delay is for waiting subsequent 'added' events to come after the first
 219   // one when multiple tasks are added. This way, we can avoid frequent UI
 220   // update caused by differences between singular and plural cases.
 221   void ScheduleDriveFileTransferEvent(const drive::JobInfo& job_info,
 222                                       const std::string& status,
 223                                       bool immediate);
 224
 225   // Sends the most recently scheduled onFileTransferUpdated event to
 226   // extensions.
 227   // This is used for implementing ScheduledDriveFileTransferEvent().
 228   void SendDriveFileTransferEvent();
 229
 230   std::map<drive::JobID, DriveJobInfoWithStatus> drive_jobs_;
 231   scoped_ptr<DriveJobInfoWithStatus> drive_job_info_for_scheduled_event_;
 232   base::Time last_copy_progress_event_;
 233   base::Time next_send_file_transfer_event_;
 234
 235   WatcherMap file_watchers_;
 236   scoped_ptr<PrefChangeRegistrar> pref_change_registrar_;
 237   Profile* profile_;
 238
 239   content::NotificationRegistrar notification_registrar_;
 240
 241   scoped_ptr<DeviceEventRouter> device_event_router_;
 242
 243   DispatchDirectoryChangeEventImplCallback
 244       dispatch_directory_change_event_impl_;
 245
 246   // Note: This should remain the last member so it'll be destroyed and
 247   // invalidate the weak pointers before any other members are destroyed.
 248   base::WeakPtrFactory<EventRouter> weak_factory_;
 249
 250   DISALLOW_COPY_AND_ASSIGN(EventRouter);
 251 };
 252
 253 }  // namespace file_manager
 254
 255 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_EVENT_ROUTER_H_