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/**
* Copyright (C) 2021 Saturneric <[email protected]>
*
* This file is part of GpgFrontend.
*
* GpgFrontend is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GpgFrontend is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
*
* The initial version of the source code is inherited from
* the gpg4usb project, which is under GPL-3.0-or-later.
*
* All the source code of GpgFrontend was modified and released by
* Saturneric <[email protected]> starting on May 12, 2021.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#include "CacheManager.h"
#include <algorithm>
#include <boost/format.hpp>
#include "function/DataObjectOperator.h"
GpgFrontend::CacheManager::CacheManager(int channel)
: SingletonFunctionObject<CacheManager>(channel),
m_timer_(new QTimer(this)) {
connect(m_timer_, &QTimer::timeout, this, &CacheManager::flush_cache_storage);
m_timer_->start(15000);
load_all_cache_storage();
}
void GpgFrontend::CacheManager::SaveCache(std::string key,
const nlohmann::json& value,
bool flush) {
auto data_object_key = get_data_object_key(key);
cache_storage_.insert(key, value);
if (std::find(key_storage_.begin(), key_storage_.end(), key) ==
key_storage_.end()) {
SPDLOG_DEBUG("register new key of cache", key);
key_storage_.push_back(key);
}
if (flush) {
flush_cache_storage();
}
}
nlohmann::json GpgFrontend::CacheManager::LoadCache(std::string key) {
auto data_object_key = get_data_object_key(key);
if (!cache_storage_.exists(key)) {
cache_storage_.insert(key, load_cache_storage(key, {}));
}
auto cache = cache_storage_.get(key);
if (cache)
return *cache;
else
return {};
}
nlohmann::json GpgFrontend::CacheManager::LoadCache(
std::string key, nlohmann::json default_value) {
auto data_object_key = get_data_object_key(key);
if (!cache_storage_.exists(key)) {
cache_storage_.insert(key, load_cache_storage(key, default_value));
}
auto cache = cache_storage_.get(key);
if (cache)
return *cache;
else
return {};
}
std::string GpgFrontend::CacheManager::get_data_object_key(std::string key) {
return (boost::format("__cache_data_%1%") % key).str();
}
nlohmann::json GpgFrontend::CacheManager::load_cache_storage(
std::string key, nlohmann::json default_value) {
auto data_object_key = get_data_object_key(key);
auto stored_data =
GpgFrontend::DataObjectOperator::GetInstance().GetDataObject(
data_object_key);
if (stored_data.has_value()) {
return stored_data.value();
} else {
return default_value;
}
}
void GpgFrontend::CacheManager::flush_cache_storage() {
for (auto cache : cache_storage_.mirror()) {
auto key = get_data_object_key(cache.first);
SPDLOG_DEBUG("save cache into filesystem, key {}, value size: {}", key,
cache.second.size());
GpgFrontend::DataObjectOperator::GetInstance().SaveDataObj(key,
cache.second);
}
GpgFrontend::DataObjectOperator::GetInstance().SaveDataObj(drk_key_,
key_storage_);
}
void GpgFrontend::CacheManager::register_cache_key(std::string key) {}
void GpgFrontend::CacheManager::load_all_cache_storage() {
SPDLOG_DEBUG("start to load all cache from file system");
auto stored_data =
GpgFrontend::DataObjectOperator::GetInstance().GetDataObject(drk_key_);
// get cache data list from file system
nlohmann::json registered_key_list;
if (stored_data.has_value()) {
registered_key_list = std::move(stored_data.value());
}
if (!registered_key_list.is_array()) {
GpgFrontend::DataObjectOperator::GetInstance().SaveDataObj(
drk_key_, nlohmann::json::array());
SPDLOG_ERROR("drk_key_ is not an array, abort.");
return;
}
for (auto key : registered_key_list) {
load_cache_storage(key, {});
}
key_storage_ = registered_key_list;
}
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