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// Copyright 2014 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.
// MediaStorageUtil provides information about storage devices attached
// to the computer.
#ifndef COMPONENTS_STORAGE_MONITOR_MEDIA_STORAGE_UTIL_H_
#define COMPONENTS_STORAGE_MONITOR_MEDIA_STORAGE_UTIL_H_
#include <set>
#include <string>
#include "base/basictypes.h"
#include "base/callback_forward.h"
#include "base/files/file_path.h"
namespace storage_monitor {
class StorageInfo;
class MediaStorageUtil {
public:
typedef std::set<std::string /*device id*/> DeviceIdSet;
// Check if the file system at the passed mount point looks like a media
// device using the existence of DCIM directory.
// Returns true if it looks like a media device, otherwise returns false.
// Mac OS X behaves similarly, but this is not the only heuristic it uses.
// TODO(vandebo) Try to figure out how Mac OS X decides this, and rename
// if additional OS X heuristic is implemented.
static bool HasDcim(const base::FilePath& mount_point);
// Returns true if we will be able to create a filesystem for this device.
static bool CanCreateFileSystem(const std::string& device_id,
const base::FilePath& path);
// Removes disconnected devices from |devices| and then calls |done|.
static void FilterAttachedDevices(DeviceIdSet* devices,
const base::Closure& done);
// Given |path|, fill in |device_info|, and |relative_path|
// (from the root of the device).
static bool GetDeviceInfoFromPath(const base::FilePath& path,
StorageInfo* device_info,
base::FilePath* relative_path);
// Get a base::FilePath for the given |device_id|. If the device isn't a mass
// storage type, the base::FilePath will be empty. This does not check that
// the device is connected.
static base::FilePath FindDevicePathById(const std::string& device_id);
// Record device information histogram for the given |device_uuid| and
// |device_label|. |mass_storage| indicates whether the current device is a
// mass storage device, as defined by IsMassStorageDevice().
static void RecordDeviceInfoHistogram(bool mass_storage,
const std::string& device_uuid,
const base::string16& device_label);
// Returns true if the |id| is both a removable device and also
// currently attached.
static bool IsRemovableStorageAttached(const std::string& id);
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(MediaStorageUtil);
};
} // namespace storage_monitor
#endif // COMPONENTS_STORAGE_MONITOR_MEDIA_STORAGE_UTIL_H_
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