1 // Copyright 2014 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.
5 #include "components/storage_monitor/media_storage_util.h"
9 #include "base/callback.h"
10 #include "base/file_util.h"
11 #include "base/logging.h"
12 #include "base/metrics/histogram.h"
13 #include "base/strings/string_util.h"
14 #include "base/strings/utf_string_conversions.h"
15 #include "components/storage_monitor/removable_device_constants.h"
16 #include "components/storage_monitor/storage_monitor.h"
17 #include "content/public/browser/browser_thread.h"
19 using content::BrowserThread;
21 namespace storage_monitor {
25 // MediaDeviceNotification.DeviceInfo histogram values.
26 enum DeviceInfoHistogramBuckets {
27 MASS_STORAGE_DEVICE_NAME_AND_UUID_AVAILABLE,
28 MASS_STORAGE_DEVICE_UUID_MISSING,
29 MASS_STORAGE_DEVICE_NAME_MISSING,
30 MASS_STORAGE_DEVICE_NAME_AND_UUID_MISSING,
31 MTP_STORAGE_DEVICE_NAME_AND_UUID_AVAILABLE,
32 MTP_STORAGE_DEVICE_UUID_MISSING,
33 MTP_STORAGE_DEVICE_NAME_MISSING,
34 MTP_STORAGE_DEVICE_NAME_AND_UUID_MISSING,
35 DEVICE_INFO_BUCKET_BOUNDARY
39 const char kRootPath[] = "/";
42 typedef std::vector<StorageInfo> StorageInfoList;
44 base::FilePath::StringType FindRemovableStorageLocationById(
45 const std::string& device_id) {
46 StorageInfoList devices =
47 StorageMonitor::GetInstance()->GetAllAvailableStorages();
48 for (StorageInfoList::const_iterator it = devices.begin();
49 it != devices.end(); ++it) {
50 if (it->device_id() == device_id
51 && StorageInfo::IsRemovableDevice(device_id))
52 return it->location();
54 return base::FilePath::StringType();
57 void FilterAttachedDevicesOnFileThread(MediaStorageUtil::DeviceIdSet* devices) {
58 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
59 MediaStorageUtil::DeviceIdSet missing_devices;
61 for (MediaStorageUtil::DeviceIdSet::const_iterator it = devices->begin();
64 StorageInfo::Type type;
65 std::string unique_id;
66 if (!StorageInfo::CrackDeviceId(*it, &type, &unique_id)) {
67 missing_devices.insert(*it);
71 if (type == StorageInfo::FIXED_MASS_STORAGE ||
72 type == StorageInfo::ITUNES ||
73 type == StorageInfo::IPHOTO ||
74 type == StorageInfo::PICASA) {
75 if (!base::PathExists(base::FilePath::FromUTF8Unsafe(unique_id)))
76 missing_devices.insert(*it);
80 if (!MediaStorageUtil::IsRemovableStorageAttached(*it))
81 missing_devices.insert(*it);
84 for (MediaStorageUtil::DeviceIdSet::const_iterator it =
85 missing_devices.begin();
86 it != missing_devices.end();
95 bool MediaStorageUtil::HasDcim(const base::FilePath& mount_point) {
96 DCHECK(!content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
98 base::FilePath::StringType dcim_dir(kDCIMDirectoryName);
99 if (!base::DirectoryExists(mount_point.Append(dcim_dir))) {
100 // Check for lowercase 'dcim' as well.
101 base::FilePath dcim_path_lower(
102 mount_point.Append(base::StringToLowerASCII(dcim_dir)));
103 if (!base::DirectoryExists(dcim_path_lower))
110 bool MediaStorageUtil::CanCreateFileSystem(const std::string& device_id,
111 const base::FilePath& path) {
112 StorageInfo::Type type;
113 if (!StorageInfo::CrackDeviceId(device_id, &type, NULL))
116 if (type == StorageInfo::MAC_IMAGE_CAPTURE)
119 return !path.empty() && path.IsAbsolute() && !path.ReferencesParent();
123 void MediaStorageUtil::FilterAttachedDevices(DeviceIdSet* devices,
124 const base::Closure& done) {
125 if (BrowserThread::CurrentlyOn(BrowserThread::FILE)) {
126 FilterAttachedDevicesOnFileThread(devices);
130 BrowserThread::PostTaskAndReply(BrowserThread::FILE,
132 base::Bind(&FilterAttachedDevicesOnFileThread,
137 // TODO(kmadhusu) Write unit tests for GetDeviceInfoFromPath().
138 bool MediaStorageUtil::GetDeviceInfoFromPath(const base::FilePath& path,
139 StorageInfo* device_info,
140 base::FilePath* relative_path) {
142 DCHECK(relative_path);
144 if (!path.IsAbsolute())
148 StorageMonitor* monitor = StorageMonitor::GetInstance();
149 bool found_device = monitor->GetStorageInfoForPath(path, &info);
151 if (found_device && StorageInfo::IsRemovableDevice(info.device_id())) {
152 base::FilePath sub_folder_path;
153 base::FilePath device_path(info.location());
154 if (path != device_path) {
155 bool success = device_path.AppendRelativePath(path, &sub_folder_path);
160 *relative_path = sub_folder_path;
164 // On Posix systems, there's one root so any absolute path could be valid.
165 // TODO(gbillock): Delete this stanza? Posix systems should have the root
166 // volume information. If not, we should move the below into the
167 // right GetStorageInfoForPath implementations.
168 #if !defined(OS_POSIX)
173 // Handle non-removable devices. Note: this is just overwriting
174 // good values from StorageMonitor.
175 // TODO(gbillock): Make sure return values from that class are definitive,
176 // and don't do this here.
178 StorageInfo::MakeDeviceId(StorageInfo::FIXED_MASS_STORAGE,
179 path.AsUTF8Unsafe()));
181 *relative_path = base::FilePath();
186 base::FilePath MediaStorageUtil::FindDevicePathById(
187 const std::string& device_id) {
188 StorageInfo::Type type;
189 std::string unique_id;
190 if (!StorageInfo::CrackDeviceId(device_id, &type, &unique_id))
191 return base::FilePath();
193 if (type == StorageInfo::FIXED_MASS_STORAGE ||
194 type == StorageInfo::ITUNES ||
195 type == StorageInfo::IPHOTO ||
196 type == StorageInfo::PICASA) {
197 // For this type, the unique_id is the path.
198 return base::FilePath::FromUTF8Unsafe(unique_id);
201 // For ImageCapture, the synthetic filesystem will be rooted at a fake
202 // top-level directory which is the device_id.
203 if (type == StorageInfo::MAC_IMAGE_CAPTURE) {
205 return base::FilePath(kRootPath + device_id);
209 DCHECK(type == StorageInfo::MTP_OR_PTP ||
210 type == StorageInfo::REMOVABLE_MASS_STORAGE_WITH_DCIM ||
211 type == StorageInfo::REMOVABLE_MASS_STORAGE_NO_DCIM);
212 return base::FilePath(FindRemovableStorageLocationById(device_id));
216 void MediaStorageUtil::RecordDeviceInfoHistogram(
218 const std::string& device_uuid,
219 const base::string16& device_label) {
220 unsigned int event_number = 0;
224 if (device_label.empty())
227 if (device_uuid.empty())
229 enum DeviceInfoHistogramBuckets event =
230 static_cast<enum DeviceInfoHistogramBuckets>(event_number);
231 if (event >= DEVICE_INFO_BUCKET_BOUNDARY) {
235 UMA_HISTOGRAM_ENUMERATION("MediaDeviceNotifications.DeviceInfo", event,
236 DEVICE_INFO_BUCKET_BOUNDARY);
239 bool MediaStorageUtil::IsRemovableStorageAttached(const std::string& id) {
240 StorageInfoList devices =
241 StorageMonitor::GetInstance()->GetAllAvailableStorages();
242 for (StorageInfoList::const_iterator it = devices.begin();
243 it != devices.end(); ++it) {
244 if (StorageInfo::IsRemovableDevice(id) && it->device_id() == id)
250 } // namespace storage_monitor