Add CrosDisksClient

chrome/browser/chromeos/dbus/cros_disks_client.h

+// Copyright (c) 2011 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_DBUS_CROS_DISKS_CLIENT_H_
+#define CHROME_BROWSER_CHROMEOS_DBUS_CROS_DISKS_CLIENT_H_
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/callback.h"
+
+namespace dbus {
+class Bus;
+class Response;
+}
+
+namespace chromeos {
+
+// Enum describing types of mount used by cros-disks.
+enum MountType {
+  MOUNT_TYPE_INVALID,
+  MOUNT_TYPE_DEVICE,
+  MOUNT_TYPE_ARCHIVE,
+  MOUNT_TYPE_NETWORK_STORAGE,
+};
+
+// Type of device.
+enum DeviceType {
+  FLASH,
+  HDD,
+  OPTICAL,
+  UNDEFINED,
+};
+
+// Mount error code used by cros-disks.
+enum MountError {
+  MOUNT_ERROR_NONE = 0,
+  MOUNT_ERROR_UNKNOWN = 1,
+  MOUNT_ERROR_INTERNAL = 2,
+  MOUNT_ERROR_UNKNOWN_FILESYSTEM = 101,
+  MOUNT_ERROR_UNSUPORTED_FILESYSTEM = 102,
+  MOUNT_ERROR_INVALID_ARCHIVE = 201,
+  MOUNT_ERROR_LIBRARY_NOT_LOADED = 501,
+  MOUNT_ERROR_PATH_UNMOUNTED = 901,
+  // TODO(tbarzic): Add more error codes as they get added to cros-disks and
+  // consider doing explicit translation from cros-disks error_types.
+};
+
+// Event type each corresponding to a signal sent from cros-disks.
+enum MountEventType {
+  DISK_ADDED,
+  DISK_REMOVED,
+  DISK_CHANGED,
+  DEVICE_ADDED,
+  DEVICE_REMOVED,
+  DEVICE_SCANNED,
+  FORMATTING_FINISHED,
+};
+
+// A class to represent information about a disk sent from cros-disks.
+class DiskInfo {
+ public:
+  DiskInfo(const std::string& device_path, dbus::Response* response);
+  ~DiskInfo();
+
+  // Device path. (e.g. /sys/devices/pci0000:00/.../8:0:0:0/block/sdb/sdb1)
+  std::string device_path() const { return device_path_; }
+
+  // Disk mount path. (e.g. /media/removable/VOLUME)
+  std::string mount_path() const { return mount_path_; }
+
+  // Disk system path given by udev.
+  // (e.g. /sys/devices/pci0000:00/.../8:0:0:0/block/sdb/sdb1)
+  std::string system_path() const { return system_path_; }
+
+  // Is a drive or not. (i.e. true with /dev/sdb, false with /dev/sdb1)
+  bool is_drive() const { return is_drive_; }
+
+  // Does the disk have media content.
+  bool has_media() const { return has_media_; }
+
+  // Is the disk on deveice we booted the machine from.
+  bool on_boot_device() const { return on_boot_device_; }
+
+  // Disk file path (e.g. /dev/sdb).
+  std::string file_path() const { return file_path_; }
+
+  // Disk label.
+  std::string label() const { return label_; }
+
+  // Disk model. (e.g. "TransMemory")
+  std::string drive_label() const { return drive_model_; }
+
+  // Device type. Not working well, yet.
+  DeviceType device_type() const { return device_type_; }
+
+  // Total size of the disk in bytes.
+  uint64 total_size_in_bytes() const { return total_size_in_bytes_; }
+
+  // Is the device read-only.
+  bool is_read_only() const { return is_read_only_; }
+
+  // Returns true if the device should be hidden from the file browser.
+  bool is_hidden() const { return is_hidden_; }
+
+ private:
+  void InitializeFromResponse(dbus::Response* response);
+
+  std::string device_path_;
+  std::string mount_path_;
+  std::string system_path_;
+  bool is_drive_;
+  bool has_media_;
+  bool on_boot_device_;
+
+  std::string file_path_;
+  std::string label_;
+  std::string drive_model_;
+  DeviceType device_type_;
+  uint64 total_size_in_bytes_;
+  bool is_read_only_;
+  bool is_hidden_;
+};
+
+// A class to make the actual DBus calls for cros-disks service.
+// This class only makes calls, result/error handling should be done
+// by callbacks.
+class CrosDisksClient {
+ public:
+  // A callback to be called when DBus method call fails.
+  typedef base::Callback<void()> ErrorCallback;
+
+  // A callback to handle the result of Mount.
+  typedef base::Callback<void()> MountCallback;
+
+  // A callback to handle the result of Unmount.
+  // The argument is the device path.
+  typedef base::Callback<void(const std::string&)> UnmountCallback;
+
+  // A callback to handle the result of EnumerateAutoMountableDevices.
+  // The argument is the enumerated device paths.
+  typedef base::Callback<void(const std::vector<std::string>&)
+                         > EnumerateAutoMountableDevicesCallback;
+
+  // A callback to handle the result of FormatDevice.
+  // The first argument is the device path.
+  // The second argument is true when formatting succeeded, false otherwise.
+  typedef base::Callback<void(const std::string&, bool)> FormatDeviceCallback;
+
+  // A callback to handle the result of GetDeviceProperties.
+  // The argument is the information about the specified device.
+  typedef base::Callback<void(const DiskInfo&)> GetDevicePropertiesCallback;
+
+  // A callback to handle MountCompleted signal.
+  // The first argument is the error code.
+  // The second argument is the source path.
+  // The third argument is the mount type.
+  // The fourth argument is the mount path.
+  typedef base::Callback<void(MountError, const std::string&, MountType,
+                              const std::string&)> MountCompletedHandler;
+
+  // A callback to handle mount events.
+  // The first argument is the event type.
+  // The second argument is the device path.
+  typedef base::Callback<void(MountEventType, const std::string&)
+                         > MountEventHandler;
+
+  virtual ~CrosDisksClient();
+
+  // Calls Mount method.  |callback| is called after the method call succeeds,
+  // otherwise, |error_callback| is called.
+  virtual void Mount(const std::string& source_path,
+                     MountType type,
+                     MountCallback callback,
+                     ErrorCallback error_callback) = 0;
+
+  // Calls Unmount method.  |callback| is called after the method call succeeds,
+  // otherwise, |error_callback| is called.
+  virtual void Unmount(const std::string& device_path,
+                       UnmountCallback callback,
+                       ErrorCallback error_callback) = 0;
+
+  // Calls EnumerateAutoMountableDevices method.  |callback| is called after the
+  // method call succeeds, otherwise, |error_callback| is called.
+  virtual void EnumerateAutoMountableDevices(
+      EnumerateAutoMountableDevicesCallback callback,
+      ErrorCallback error_callback) = 0;
+
+  // Calls FormatDevice method.  |callback| is called after the method call
+  // succeeds, otherwise, |error_callback| is called.
+  virtual void FormatDevice(const std::string& device_path,
+                            const std::string& filesystem,
+                            FormatDeviceCallback callback,
+                            ErrorCallback error_callback) = 0;
+
+  // Calls GetDeviceProperties method.  |callback| is called after the method
+  // call succeeds, otherwise, |error_callback| is called.
+  virtual void GetDeviceProperties(const std::string& device_path,
+                                   GetDevicePropertiesCallback callback,
+                                   ErrorCallback error_callback) = 0;
+
+  // Registers given callback for events.
+  // |mount_event_handler| is called when mount event signal is received.
+  // |mount_completed_handler| is called when MountCompleted signal is received.
+  virtual void SetUpConnections(
+      MountEventHandler mount_event_handler,
+      MountCompletedHandler mount_completed_handler) = 0;
+
+  // Factory function, creates a new instance and returns ownership.
+  // For normal usage, access the singleton via DBusThreadManager::Get().
+  static CrosDisksClient* Create(dbus::Bus* bus);
+
+ protected:
+  // Create() should be used instead.
+  CrosDisksClient();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CrosDisksClient);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_DBUS_CROS_DISKS_CLIENT_H_