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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/base/file_host_settings.h"
#include "base/files/file_util.h"
#include "base/files/important_file_writer.h"
#include "base/json/json_file_value_serializer.h"
#include "base/json/json_writer.h"
#include "base/logging.h"
#include "base/task/sequenced_task_runner.h"
#include "base/values.h"
#include "remoting/base/logging.h"
namespace remoting {
FileHostSettings::FileHostSettings(const base::FilePath& settings_file)
: settings_file_(settings_file) {}
FileHostSettings::~FileHostSettings() = default;
void FileHostSettings::InitializeInstance() {
// TODO(yuweih): Make FileHostSettings detect changes of the settings file.
if (settings_) {
return;
}
if (!base::PathIsReadable(settings_file_)) {
HOST_LOG << "Host settings file " << settings_file_ << " does not exist.";
return;
}
JSONFileValueDeserializer deserializer(settings_file_);
int error_code;
std::string error_message;
std::unique_ptr<base::Value> settings =
deserializer.Deserialize(&error_code, &error_message);
if (!settings) {
LOG(WARNING) << "Failed to load " << settings_file_
<< ". Code: " << error_code << ", message: " << error_message;
return;
}
if (!settings->is_dict()) {
LOG(WARNING) << "Settings loaded from " << settings_file_
<< " are not a valid json dictionary.";
return;
}
settings_ = std::move(*settings).TakeDict();
HOST_LOG << "Host settings loaded.";
}
std::string FileHostSettings::GetString(
const HostSettingKey key,
const std::string& default_value) const {
#if !defined(NDEBUG)
if (task_runner_for_checking_sequence_) {
DCHECK(task_runner_for_checking_sequence_->RunsTasksInCurrentSequence());
}
#endif
if (!settings_) {
VLOG(1) << "Either Initialize() has not been called, or the settings file "
"doesn't exist.";
return default_value;
}
const std::string* string_value = settings_->FindString(key);
if (!string_value) {
return default_value;
}
return *string_value;
}
void FileHostSettings::SetString(const HostSettingKey key,
const std::string& value) {
#if !defined(NDEBUG)
if (task_runner_for_checking_sequence_) {
DCHECK(task_runner_for_checking_sequence_->RunsTasksInCurrentSequence());
} else {
task_runner_for_checking_sequence_ =
base::SequencedTaskRunner::GetCurrentDefault();
}
#endif
if (!settings_) {
VLOG(1) << "Settings file didn't exist. New file will be created.";
settings_ = base::Value::Dict();
}
settings_->Set(key, value);
auto json = base::WriteJson(*settings_);
if (!json) {
LOG(ERROR) << "Failed to serialize host settings JSON";
return;
}
if (!base::ImportantFileWriter::WriteFileAtomically(settings_file_, *json)) {
LOG(ERROR) << "Can't write host settings file to " << settings_file_;
}
}
} // namespace remoting
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