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// Copyright 2013 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 "components/drive/file_system/open_file_operation.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback_helpers.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/task_runner_util.h"
#include "base/thread_task_runner_handle.h"
#include "components/drive/drive.pb.h"
#include "components/drive/file_cache.h"
#include "components/drive/file_errors.h"
#include "components/drive/file_system/create_file_operation.h"
#include "components/drive/file_system/download_operation.h"
#include "components/drive/file_system/operation_delegate.h"
#include "components/drive/job_scheduler.h"
namespace drive {
namespace file_system {
OpenFileOperation::OpenFileOperation(
base::SequencedTaskRunner* blocking_task_runner,
OperationDelegate* delegate,
JobScheduler* scheduler,
internal::ResourceMetadata* metadata,
internal::FileCache* cache,
const base::FilePath& temporary_file_directory)
: blocking_task_runner_(blocking_task_runner),
delegate_(delegate),
cache_(cache),
create_file_operation_(new CreateFileOperation(
blocking_task_runner, delegate, metadata)),
download_operation_(new DownloadOperation(
blocking_task_runner, delegate, scheduler,
metadata, cache, temporary_file_directory)),
weak_ptr_factory_(this) {
}
OpenFileOperation::~OpenFileOperation() {
}
void OpenFileOperation::OpenFile(const base::FilePath& file_path,
OpenMode open_mode,
const std::string& mime_type,
const OpenFileCallback& callback) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(!callback.is_null());
switch (open_mode) {
case OPEN_FILE:
// It is not necessary to create a new file even if not exists.
// So call OpenFileAfterCreateFile directly with FILE_ERROR_OK
// to skip file creation.
OpenFileAfterCreateFile(file_path, callback, FILE_ERROR_OK);
break;
case CREATE_FILE:
create_file_operation_->CreateFile(
file_path,
true, // exclusive: fail if already exists
mime_type,
base::Bind(&OpenFileOperation::OpenFileAfterCreateFile,
weak_ptr_factory_.GetWeakPtr(), file_path, callback));
break;
case OPEN_OR_CREATE_FILE:
create_file_operation_->CreateFile(
file_path,
false, // not-exclusive
mime_type,
base::Bind(&OpenFileOperation::OpenFileAfterCreateFile,
weak_ptr_factory_.GetWeakPtr(), file_path, callback));
break;
}
}
void OpenFileOperation::OpenFileAfterCreateFile(
const base::FilePath& file_path,
const OpenFileCallback& callback,
FileError error) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(!callback.is_null());
if (error != FILE_ERROR_OK) {
callback.Run(error, base::FilePath(), base::Closure());
return;
}
download_operation_->EnsureFileDownloadedByPath(
file_path,
ClientContext(USER_INITIATED),
GetFileContentInitializedCallback(),
google_apis::GetContentCallback(),
base::Bind(
&OpenFileOperation::OpenFileAfterFileDownloaded,
weak_ptr_factory_.GetWeakPtr(), callback));
}
void OpenFileOperation::OpenFileAfterFileDownloaded(
const OpenFileCallback& callback,
FileError error,
const base::FilePath& local_file_path,
scoped_ptr<ResourceEntry> entry) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(!callback.is_null());
if (error == FILE_ERROR_OK) {
DCHECK(entry);
DCHECK(entry->has_file_specific_info());
if (entry->file_specific_info().is_hosted_document())
// No support for opening a hosted document.
error = FILE_ERROR_INVALID_OPERATION;
}
if (error != FILE_ERROR_OK) {
callback.Run(error, base::FilePath(), base::Closure());
return;
}
scoped_ptr<base::ScopedClosureRunner>* file_closer =
new scoped_ptr<base::ScopedClosureRunner>;
base::PostTaskAndReplyWithResult(
blocking_task_runner_.get(),
FROM_HERE,
base::Bind(&internal::FileCache::OpenForWrite,
base::Unretained(cache_),
entry->local_id(),
file_closer),
base::Bind(&OpenFileOperation::OpenFileAfterOpenForWrite,
weak_ptr_factory_.GetWeakPtr(),
local_file_path,
entry->local_id(),
callback,
base::Owned(file_closer)));
}
void OpenFileOperation::OpenFileAfterOpenForWrite(
const base::FilePath& local_file_path,
const std::string& local_id,
const OpenFileCallback& callback,
scoped_ptr<base::ScopedClosureRunner>* file_closer,
FileError error) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(!callback.is_null());
if (error != FILE_ERROR_OK) {
callback.Run(error, base::FilePath(), base::Closure());
return;
}
++open_files_[local_id];
callback.Run(error, local_file_path,
base::Bind(&OpenFileOperation::CloseFile,
weak_ptr_factory_.GetWeakPtr(),
local_id,
base::Passed(file_closer)));
}
void OpenFileOperation::CloseFile(
const std::string& local_id,
scoped_ptr<base::ScopedClosureRunner> file_closer) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK_GT(open_files_[local_id], 0);
if (--open_files_[local_id] == 0) {
// All clients closes this file, so notify to upload the file.
open_files_.erase(local_id);
delegate_->OnEntryUpdatedByOperation(ClientContext(USER_INITIATED),
local_id);
// Clients may have enlarged the file. By FreeDiskpSpaceIfNeededFor(0),
// we try to ensure (0 + the-minimum-safe-margin = 512MB as of now) space.
blocking_task_runner_->PostTask(
FROM_HERE,
base::Bind(base::IgnoreResult(
base::Bind(&internal::FileCache::FreeDiskSpaceIfNeededFor,
base::Unretained(cache_),
0))));
}
}
} // namespace file_system
} // namespace drive
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