[fsp] Add the getMetadata operation.

chrome/browser/chromeos/file_system_provider/operations/get_metadata.cc

+// 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/file_system_provider/operations/get_metadata.h"
+
+#include <string>
+
+#include "chrome/common/extensions/api/file_system_provider.h"
+#include "chrome/common/extensions/api/file_system_provider_internal.h"
+
+namespace chromeos {
+namespace file_system_provider {
+namespace operations {
+namespace {
+
+// Convert |value| into |output|. If parsing fails, then returns false.
+bool ConvertRequestValueToFileInfo(scoped_ptr<RequestValue> value,
+                                   base::File::Info* output) {
+  using extensions::api::file_system_provider::EntryMetadata;
+  using extensions::api::file_system_provider_internal::
+      GetMetadataRequestedSuccess::Params;
+
+  const Params* params = value->get_metadata_success_params();
+  if (!params)
+    return false;
+
+  output->is_directory = params->metadata.is_directory;
+  output->size = static_cast<int64>(params->metadata.size);
+  output->is_symbolic_link = false;  // Not supported.
+
+  std::string input_modification_time;
+  if (!params->metadata.modification_time.additional_properties.GetString(
+          "value", &input_modification_time)) {
+    return false;
+  }
+  if (!base::Time::FromString(input_modification_time.c_str(),
+                              &output->last_modified)) {
+    return false;
+  }
+
+  return true;
+}
+
+}  // namespace
+
+GetMetadata::GetMetadata(
+    extensions::EventRouter* event_router,
+    const ProvidedFileSystemInfo& file_system_info,
+    const base::FilePath& directory_path,
+    const fileapi::AsyncFileUtil::GetFileInfoCallback& callback)
+    : Operation(event_router, file_system_info),
+      directory_path_(directory_path),
+      callback_(callback) {
+}
+
+GetMetadata::~GetMetadata() {
+}
+
+bool GetMetadata::Execute(int request_id) {
+  scoped_ptr<base::ListValue> values(new base::ListValue);
+  values->AppendString(directory_path_.AsUTF8Unsafe());
+  return SendEvent(
+      request_id,
+      extensions::api::file_system_provider::OnGetMetadataRequested::kEventName,
+      values.Pass());
+}
+
+void GetMetadata::OnSuccess(int /* request_id */,
+                            scoped_ptr<RequestValue> result,
+                            bool has_next) {
+  base::File::Info file_info;
+  const bool convert_result =
+      ConvertRequestValueToFileInfo(result.Pass(), &file_info);
+  DCHECK(convert_result);
+  callback_.Run(base::File::FILE_OK, file_info);
+}
+
+void GetMetadata::OnError(int /* request_id */, base::File::Error error) {
+  callback_.Run(error, base::File::Info());
+}
+
+}  // namespace operations
+}  // namespace file_system_provider
+}  // namespace chromeos