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// 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.
#include "webkit/fileapi/media/device_media_file_util.h"
#include "base/file_util.h"
#include "base/message_loop_proxy.h"
#include "webkit/fileapi/file_system_operation_context.h"
#include "webkit/fileapi/file_system_url.h"
#include "webkit/fileapi/isolated_context.h"
#include "webkit/fileapi/media/filtering_file_enumerator.h"
#include "webkit/fileapi/media/media_path_filter.h"
#include "webkit/fileapi/media/mtp_device_delegate.h"
#include "webkit/fileapi/media/mtp_device_map_service.h"
using base::PlatformFile;
using base::PlatformFileError;
using base::PlatformFileInfo;
namespace fileapi {
namespace {
const base::FilePath::CharType kDeviceMediaFileUtilTempDir[] =
FILE_PATH_LITERAL("DeviceMediaFileSystem");
MTPDeviceDelegate* GetMTPDeviceDelegate(FileSystemOperationContext* context) {
DCHECK(context->task_runner()->RunsTasksOnCurrentThread());
return MTPDeviceMapService::GetInstance()->GetMTPDeviceDelegate(
context->mtp_device_delegate_url());
}
} // namespace
DeviceMediaFileUtil::DeviceMediaFileUtil(const base::FilePath& profile_path)
: profile_path_(profile_path) {
}
PlatformFileError DeviceMediaFileUtil::CreateOrOpen(
FileSystemOperationContext* context,
const FileSystemURL& url, int file_flags,
PlatformFile* file_handle, bool* created) {
return base::PLATFORM_FILE_ERROR_SECURITY;
}
PlatformFileError DeviceMediaFileUtil::Close(
FileSystemOperationContext* context,
PlatformFile file_handle) {
// We don't allow open thus Close won't be called.
return base::PLATFORM_FILE_ERROR_SECURITY;
}
PlatformFileError DeviceMediaFileUtil::EnsureFileExists(
FileSystemOperationContext* context,
const FileSystemURL& url,
bool* created) {
return base::PLATFORM_FILE_ERROR_SECURITY;
}
PlatformFileError DeviceMediaFileUtil::CreateDirectory(
FileSystemOperationContext* context,
const FileSystemURL& url,
bool exclusive,
bool recursive) {
return base::PLATFORM_FILE_ERROR_SECURITY;
}
PlatformFileError DeviceMediaFileUtil::GetFileInfo(
FileSystemOperationContext* context,
const FileSystemURL& url,
PlatformFileInfo* file_info,
base::FilePath* platform_path) {
MTPDeviceDelegate* delegate = GetMTPDeviceDelegate(context);
if (!delegate)
return base::PLATFORM_FILE_ERROR_NOT_FOUND;
PlatformFileError error = delegate->GetFileInfo(url.path(), file_info);
if (error != base::PLATFORM_FILE_OK)
return error;
if (file_info->is_directory ||
context->media_path_filter()->Match(url.path()))
return base::PLATFORM_FILE_OK;
return base::PLATFORM_FILE_ERROR_NOT_FOUND;
}
scoped_ptr<FileSystemFileUtil::AbstractFileEnumerator>
DeviceMediaFileUtil::CreateFileEnumerator(
FileSystemOperationContext* context,
const FileSystemURL& url,
bool recursive) {
MTPDeviceDelegate* delegate = GetMTPDeviceDelegate(context);
if (!delegate) {
return scoped_ptr<FileSystemFileUtil::AbstractFileEnumerator>(
new FileSystemFileUtil::EmptyFileEnumerator());
}
return scoped_ptr<FileSystemFileUtil::AbstractFileEnumerator>(
new FilteringFileEnumerator(
delegate->CreateFileEnumerator(url.path(), recursive),
context->media_path_filter()));
}
PlatformFileError DeviceMediaFileUtil::GetLocalFilePath(
FileSystemOperationContext* context,
const FileSystemURL& file_system_url,
base::FilePath* local_file_path) {
return base::PLATFORM_FILE_ERROR_SECURITY;
}
PlatformFileError DeviceMediaFileUtil::Touch(
FileSystemOperationContext* context,
const FileSystemURL& url,
const base::Time& last_access_time,
const base::Time& last_modified_time) {
return base::PLATFORM_FILE_ERROR_FAILED;
}
PlatformFileError DeviceMediaFileUtil::Truncate(
FileSystemOperationContext* context,
const FileSystemURL& url,
int64 length) {
return base::PLATFORM_FILE_ERROR_FAILED;
}
PlatformFileError DeviceMediaFileUtil::CopyOrMoveFile(
FileSystemOperationContext* context,
const FileSystemURL& src_url,
const FileSystemURL& dest_url,
bool copy) {
return base::PLATFORM_FILE_ERROR_SECURITY;
}
PlatformFileError DeviceMediaFileUtil::CopyInForeignFile(
FileSystemOperationContext* context,
const base::FilePath& src_file_path,
const FileSystemURL& dest_url) {
return base::PLATFORM_FILE_ERROR_SECURITY;
}
PlatformFileError DeviceMediaFileUtil::DeleteFile(
FileSystemOperationContext* context,
const FileSystemURL& url) {
return base::PLATFORM_FILE_ERROR_SECURITY;
}
PlatformFileError DeviceMediaFileUtil::DeleteDirectory(
FileSystemOperationContext* context,
const FileSystemURL& url) {
return base::PLATFORM_FILE_ERROR_SECURITY;
}
base::PlatformFileError DeviceMediaFileUtil::CreateSnapshotFile(
FileSystemOperationContext* context,
const FileSystemURL& url,
base::PlatformFileInfo* file_info,
base::FilePath* local_path,
SnapshotFilePolicy* snapshot_policy) {
DCHECK(file_info);
DCHECK(local_path);
DCHECK(snapshot_policy);
// We return a temporary file as a snapshot.
*snapshot_policy = kSnapshotFileTemporary;
MTPDeviceDelegate* delegate = GetMTPDeviceDelegate(context);
if (!delegate)
return base::PLATFORM_FILE_ERROR_NOT_FOUND;
// Create a temp file in "profile_path_/kDeviceMediaFileUtilTempDir".
base::FilePath isolated_media_file_system_dir_path =
profile_path_.Append(kDeviceMediaFileUtilTempDir);
bool dir_exists = file_util::DirectoryExists(
isolated_media_file_system_dir_path);
if (!dir_exists &&
!file_util::CreateDirectory(isolated_media_file_system_dir_path)) {
LOG(WARNING) << "Could not create a directory for media snapshot file "
<< isolated_media_file_system_dir_path.value();
return base::PLATFORM_FILE_ERROR_FAILED;
}
bool file_created = file_util::CreateTemporaryFileInDir(
isolated_media_file_system_dir_path, local_path);
if (!file_created) {
LOG(WARNING) << "Could not create a temporary file for media snapshot in "
<< isolated_media_file_system_dir_path.value();
return base::PLATFORM_FILE_ERROR_FAILED;
}
return delegate->CreateSnapshotFile(url.path(), *local_path, file_info);
}
} // namespace fileapi
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