80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
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#include <fmt/format.h>
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#include "utils/logging.hpp"
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#include "utils/settings.hpp"
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namespace utils {
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// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
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Settings global_settings;
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void Settings::Initialize(std::filesystem::path storage_path) {
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std::lock_guard settings_guard{settings_lock_};
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storage_.emplace(std::move(storage_path));
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}
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void Settings::Finalize() {
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std::lock_guard settings_guard{settings_lock_};
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storage_.reset();
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on_change_callbacks_.clear();
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}
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void Settings::RegisterSetting(std::string name, const std::string &default_value, OnChangeCallback callback) {
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std::lock_guard settings_guard{settings_lock_};
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MG_ASSERT(storage_);
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if (const auto maybe_value = storage_->Get(name); maybe_value) {
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SPDLOG_INFO("The setting with name {} already exists!", name);
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} else {
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MG_ASSERT(storage_->Put(name, default_value), "Failed to register a setting");
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}
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const auto [it, inserted] = on_change_callbacks_.emplace(std::move(name), callback);
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MG_ASSERT(inserted, "Settings storage is out of sync");
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}
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std::optional<std::string> Settings::GetValue(const std::string &setting_name) const {
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std::shared_lock settings_guard{settings_lock_};
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MG_ASSERT(storage_);
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auto maybe_value = storage_->Get(setting_name);
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return maybe_value;
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}
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bool Settings::SetValue(const std::string &setting_name, const std::string &new_value) {
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const auto settings_change_callback = std::invoke([&, this]() -> std::optional<OnChangeCallback> {
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std::lock_guard settings_guard{settings_lock_};
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MG_ASSERT(storage_);
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if (const auto maybe_value = storage_->Get(setting_name); !maybe_value) {
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return std::nullopt;
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}
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MG_ASSERT(storage_->Put(setting_name, new_value), "Failed to modify the setting");
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const auto it = on_change_callbacks_.find(setting_name);
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MG_ASSERT(it != on_change_callbacks_.end(), "Settings storage is out of sync");
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return it->second;
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});
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if (!settings_change_callback) {
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return false;
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}
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(*settings_change_callback)();
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return true;
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}
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std::vector<std::pair<std::string, std::string>> Settings::AllSettings() const {
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std::shared_lock settings_guard{settings_lock_};
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MG_ASSERT(storage_);
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std::vector<std::pair<std::string, std::string>> settings;
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settings.reserve(storage_->Size());
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for (const auto &[k, v] : *storage_) {
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settings.emplace_back(k, v);
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}
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return settings;
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}
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} // namespace utils
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