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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.
#include "chrome/browser/chromeos/drive/fileapi/file_system_backend_delegate.h"
#include "base/bind.h"
#include "base/files/file_path.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/chromeos/drive/file_system_util.h"
#include "chrome/browser/chromeos/drive/fileapi/async_file_util.h"
#include "chrome/browser/chromeos/drive/fileapi/fileapi_worker.h"
#include "chrome/browser/chromeos/drive/fileapi/webkit_file_stream_reader_impl.h"
#include "chrome/browser/chromeos/drive/fileapi/webkit_file_stream_writer_impl.h"
#include "components/drive/drive_api_util.h"
#include "components/drive/file_system_interface.h"
#include "content/public/browser/browser_thread.h"
#include "storage/browser/fileapi/async_file_util.h"
#include "storage/browser/fileapi/file_stream_reader.h"
#include "storage/browser/fileapi/file_system_context.h"
#include "storage/browser/fileapi/file_system_url.h"
using content::BrowserThread;
namespace drive {
namespace {
// Called on the UI thread after GetRedirectURLForContentsOnUIThread. Obtains
// the browser URL from |entry|. |callback| will be called on the IO thread.
void GetRedirectURLForContentsOnUIThreadWithResourceEntry(
const storage::URLCallback& callback,
FileError error,
scoped_ptr<ResourceEntry> entry) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
GURL url;
if (error == FILE_ERROR_OK && entry->has_file_specific_info() &&
entry->file_specific_info().is_hosted_document()) {
url = GURL(entry->file_specific_info().alternate_url());
}
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE, base::Bind(callback, url));
}
// Called on the UI thread after
// FileSystemBackendDelegate::GetRedirectURLForContents. Requestes to obtain
// ResourceEntry for the |url|.
void GetRedirectURLForContentsOnUIThread(
const storage::FileSystemURL& url,
const storage::URLCallback& callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
FileSystemInterface* const file_system =
fileapi_internal::GetFileSystemFromUrl(url);
if (!file_system) {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE, base::Bind(callback, GURL()));
return;
}
const base::FilePath file_path = util::ExtractDrivePathFromFileSystemUrl(url);
if (file_path.empty()) {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE, base::Bind(callback, GURL()));
return;
}
file_system->GetResourceEntry(
file_path,
base::Bind(&GetRedirectURLForContentsOnUIThreadWithResourceEntry,
callback));
}
} // namespace
FileSystemBackendDelegate::FileSystemBackendDelegate()
: async_file_util_(new internal::AsyncFileUtil) {
}
FileSystemBackendDelegate::~FileSystemBackendDelegate() {
}
storage::AsyncFileUtil* FileSystemBackendDelegate::GetAsyncFileUtil(
storage::FileSystemType type) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
DCHECK_EQ(storage::kFileSystemTypeDrive, type);
return async_file_util_.get();
}
scoped_ptr<storage::FileStreamReader>
FileSystemBackendDelegate::CreateFileStreamReader(
const storage::FileSystemURL& url,
int64_t offset,
int64_t max_bytes_to_read,
const base::Time& expected_modification_time,
storage::FileSystemContext* context) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
DCHECK_EQ(storage::kFileSystemTypeDrive, url.type());
base::FilePath file_path = util::ExtractDrivePathFromFileSystemUrl(url);
if (file_path.empty())
return scoped_ptr<storage::FileStreamReader>();
return scoped_ptr<storage::FileStreamReader>(
new internal::WebkitFileStreamReaderImpl(
base::Bind(&fileapi_internal::GetFileSystemFromUrl, url),
context->default_file_task_runner(),
file_path,
offset,
expected_modification_time));
}
scoped_ptr<storage::FileStreamWriter>
FileSystemBackendDelegate::CreateFileStreamWriter(
const storage::FileSystemURL& url,
int64_t offset,
storage::FileSystemContext* context) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
DCHECK_EQ(storage::kFileSystemTypeDrive, url.type());
base::FilePath file_path = util::ExtractDrivePathFromFileSystemUrl(url);
// Hosted documents don't support stream writer.
if (file_path.empty() || util::HasHostedDocumentExtension(file_path))
return scoped_ptr<storage::FileStreamWriter>();
return scoped_ptr<storage::FileStreamWriter>(
new internal::WebkitFileStreamWriterImpl(
base::Bind(&fileapi_internal::GetFileSystemFromUrl, url),
context->default_file_task_runner(),
file_path,
offset));
}
storage::WatcherManager* FileSystemBackendDelegate::GetWatcherManager(
storage::FileSystemType type) {
NOTIMPLEMENTED();
return NULL;
}
void FileSystemBackendDelegate::GetRedirectURLForContents(
const storage::FileSystemURL& url,
const storage::URLCallback& callback) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&GetRedirectURLForContentsOnUIThread, url, callback));
}
} // namespace drive
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