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// Copyright 2015 The Chromium Authors
// 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_core_util.h"
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <string>
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/json/json_file_value_serializer.h"
#include "base/logging.h"
#include "base/no_destructor.h"
#include "base/strings/string_number_conversions.h"
#include "base/values.h"
namespace drive {
namespace util {
namespace {
std::string ReadStringFromGDocFile(const base::FilePath& file_path,
const std::string& key) {
const int64_t kMaxGDocSize = 4096;
std::optional<int64_t> file_size = base::GetFileSize(file_path);
if (!file_size.has_value() || file_size.value() > kMaxGDocSize) {
LOG(WARNING) << "File too large to be a GDoc file " << file_path.value();
return std::string();
}
JSONFileValueDeserializer reader(file_path);
std::string error_message;
std::unique_ptr<base::Value> root_value(
reader.Deserialize(nullptr, &error_message));
if (!root_value) {
LOG(WARNING) << "Failed to parse " << file_path.value() << " as JSON."
<< " error = " << error_message;
return std::string();
}
if (const auto* dict = root_value->GetIfDict()) {
const std::string* result = dict->FindString(key);
if (result) {
return *result;
}
}
LOG(WARNING) << "No value for the given key is stored in "
<< file_path.value() << ". key = " << key;
return std::string();
}
} // namespace
const base::FilePath& GetDriveGrandRootPath() {
static base::NoDestructor<base::FilePath> grand_root_path(
base::FilePath::FromUTF8Unsafe(kDriveGrandRootDirName));
return *grand_root_path;
}
std::string ConvertChangestampToStartPageToken(int64_t changestamp) {
DCHECK_LE(0, changestamp);
return base::NumberToString(changestamp + 1);
}
GURL ReadUrlFromGDocFile(const base::FilePath& file_path) {
return GURL(ReadStringFromGDocFile(file_path, "url"));
}
std::string ReadResourceIdFromGDocFile(const base::FilePath& file_path) {
return ReadStringFromGDocFile(file_path, "resource_id");
}
} // namespace util
} // namespace drive
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