Move device notification impl out of chrome/browser/media_gallery

chrome/browser/media_gallery/media_device_notifications_chromeos.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.
-
-// chromeos::MediaDeviceNotifications implementation.
-
-#include "chrome/browser/media_gallery/media_device_notifications_chromeos.h"
-
-#include "base/file_path.h"
-#include "base/logging.h"
-#include "base/metrics/histogram.h"
-#include "base/stl_util.h"
-#include "base/string_number_conversions.h"
-#include "base/utf_string_conversions.h"
-#include "chrome/browser/media_gallery/media_device_notifications_utils.h"
-#include "chrome/browser/media_gallery/media_storage_util.h"
-#include "content/public/browser/browser_thread.h"
-
-namespace chromeos {
-
-namespace {
-
-bool GetDeviceInfo(const std::string& source_path, std::string* unique_id,
-                   string16* device_label) {
-  // Get the media device uuid and label if exists.
-  const disks::DiskMountManager::Disk* disk =
-      disks::DiskMountManager::GetInstance()->FindDiskBySourcePath(source_path);
-  if (!disk)
-    return false;
-
-  *unique_id = disk->fs_uuid();
-
-  // TODO(kmadhusu): If device label is empty, extract vendor and model details
-  // and use them as device_label.
-  *device_label = UTF8ToUTF16(disk->device_label().empty() ?
-                              FilePath(source_path).BaseName().value() :
-                              disk->device_label());
-  return true;
-}
-
-}  // namespace
-
-using content::BrowserThread;
-
-MediaDeviceNotifications::MediaDeviceNotifications() {
-  DCHECK(disks::DiskMountManager::GetInstance());
-  disks::DiskMountManager::GetInstance()->AddObserver(this);
-  CheckExistingMountPointsOnUIThread();
-}
-
-MediaDeviceNotifications::~MediaDeviceNotifications() {
-  disks::DiskMountManager* manager = disks::DiskMountManager::GetInstance();
-  if (manager) {
-    manager->RemoveObserver(this);
-  }
-}
-
-void MediaDeviceNotifications::CheckExistingMountPointsOnUIThread() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  const disks::DiskMountManager::MountPointMap& mount_point_map =
-      disks::DiskMountManager::GetInstance()->mount_points();
-  for (disks::DiskMountManager::MountPointMap::const_iterator it =
-           mount_point_map.begin(); it != mount_point_map.end(); ++it) {
-    BrowserThread::PostTask(
-        BrowserThread::FILE, FROM_HERE,
-        base::Bind(&MediaDeviceNotifications::CheckMountedPathOnFileThread,
-                   this, it->second));
-  }
-}
-
-void MediaDeviceNotifications::DiskChanged(
-    disks::DiskMountManagerEventType event,
-    const disks::DiskMountManager::Disk* disk) {
-}
-
-void MediaDeviceNotifications::DeviceChanged(
-    disks::DiskMountManagerEventType event,
-    const std::string& device_path) {
-}
-
-void MediaDeviceNotifications::MountCompleted(
-    disks::DiskMountManager::MountEvent event_type,
-    MountError error_code,
-    const disks::DiskMountManager::MountPointInfo& mount_info) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  // Ignore mount points that are not devices.
-  if (mount_info.mount_type != MOUNT_TYPE_DEVICE)
-    return;
-  // Ignore errors.
-  if (error_code != MOUNT_ERROR_NONE)
-    return;
-  if (mount_info.mount_condition != disks::MOUNT_CONDITION_NONE)
-    return;
-
-  switch (event_type) {
-    case disks::DiskMountManager::MOUNTING: {
-      if (ContainsKey(mount_map_, mount_info.mount_path)) {
-        NOTREACHED();
-        return;
-      }
-
-      BrowserThread::PostTask(
-          BrowserThread::FILE, FROM_HERE,
-          base::Bind(&MediaDeviceNotifications::CheckMountedPathOnFileThread,
-                     this, mount_info));
-      break;
-    }
-    case disks::DiskMountManager::UNMOUNTING: {
-      MountMap::iterator it = mount_map_.find(mount_info.mount_path);
-      if (it == mount_map_.end())
-        return;
-      base::SystemMonitor::Get()->ProcessRemovableStorageDetached(it->second);
-      mount_map_.erase(it);
-      break;
-    }
-  }
-}
-
-void MediaDeviceNotifications::CheckMountedPathOnFileThread(
-    const disks::DiskMountManager::MountPointInfo& mount_info) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-
-  if (!chrome::IsMediaDevice(mount_info.mount_path))
-    return;
-
-  BrowserThread::PostTask(
-      BrowserThread::UI, FROM_HERE,
-      base::Bind(&MediaDeviceNotifications::AddMountedPathOnUIThread,
-                 this, mount_info));
-}
-
-void MediaDeviceNotifications::AddMountedPathOnUIThread(
-    const disks::DiskMountManager::MountPointInfo& mount_info) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  if (ContainsKey(mount_map_, mount_info.mount_path)) {
-    NOTREACHED();
-    return;
-  }
-
-  // Get the media device uuid and label if exists.
-  std::string unique_id;
-  string16 device_label;
-  if (!GetDeviceInfo(mount_info.source_path, &unique_id, &device_label))
-    return;
-
-  // Keep track of device uuid, to see how often we receive empty uuid values.
-  UMA_HISTOGRAM_BOOLEAN("MediaDeviceNotification.device_uuid_available",
-                        !unique_id.empty());
-  if (unique_id.empty())
-    return;
-
-  std::string device_id = chrome::MediaStorageUtil::MakeDeviceId(
-      chrome::MediaStorageUtil::REMOVABLE_MASS_STORAGE_WITH_DCIM, unique_id);
-  mount_map_.insert(std::make_pair(mount_info.mount_path, device_id));
-  base::SystemMonitor::Get()->ProcessRemovableStorageAttached(
-      device_id,
-      device_label,
-      mount_info.mount_path);
-}
-
-}  // namespace chrome