#include "configcat/fileoverridedatasource.h"

#include "configcatlogger.h"

using namespace std;

namespace configcat {

FileFlagOverrides::FileFlagOverrides(const std::string& filePath, OverrideBehaviour behaviour):

filePath(filePath),

behaviour(behaviour) {

}

std::shared_ptr<OverrideDataSource> FileFlagOverrides::createDataSource(const std::shared_ptr<ConfigCatLogger>& logger) {

return make_shared<FileOverrideDataSource>(filePath, behaviour, logger);

}

FileOverrideDataSource::FileOverrideDataSource(const string& filePath, OverrideBehaviour behaviour, const std::shared_ptr<ConfigCatLogger>& logger):

OverrideDataSource(behaviour),

overrides(make_shared<unordered_map<string, Setting>>()),

filePath(filePath),

logger(logger) {

if (!filesystem::exists(filePath)) {

LOG_ERROR(1300) <<

"Cannot find the local config file '" << filePath << "'. "

"This is a path that your application provided to the ConfigCat SDK by passing it to the constructor of the `FileFlagOverrides` class. "

"Read more: https://configcat.com/docs/sdk-reference/cpp/#json-file";

}

}

shared_ptr<unordered_map<string, Setting>> FileOverrideDataSource::getOverrides() {

reloadFileContent();

return overrides;

}

void FileOverrideDataSource::reloadFileContent() {

try {

auto lastWriteTime = std::filesystem::last_write_time(filePath);

if (fileLastWriteTime != lastWriteTime) {

fileLastWriteTime = lastWriteTime;

auto config = Config::fromFile(filePath);

overrides = config->getSettingsOrEmpty();

}

} catch (const filesystem::filesystem_error&) {

LogEntry logEntry(logger, configcat::LOG_LEVEL_ERROR, 1302, current_exception());

logEntry << "Failed to read the local config file '" << filePath << "'.";

} catch (...) {

LogEntry logEntry(logger, configcat::LOG_LEVEL_ERROR, 2302, current_exception());

logEntry << "Failed to decode JSON from the local config file '" << filePath << "'.";

}

}

} // namespace configcat