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#include "utils/time_utils.hpp"
#include "utils/extern/date.h"
#include <array>
#include <chrono>
#include <optional>
#include <sstream>
#include <string>
#include <string_view>
namespace redfish::time_utils
{
std::optional<usSinceEpoch> dateStringToEpoch(std::string_view datetime)
{
for (const char* format : std::to_array({"%FT%T%Ez", "%FT%TZ", "%FT%T"}))
{
// Parse using signed so we can detect negative dates
std::chrono::sys_time<usSinceEpoch> date;
std::istringstream iss(std::string{datetime});
#if __cpp_lib_chrono >= 201907L
namespace chrono_from_stream = std::chrono;
#else
namespace chrono_from_stream = date;
#endif
if (chrono_from_stream::from_stream(iss, format, date))
{
if (date.time_since_epoch().count() < 0)
{
return std::nullopt;
}
if (iss.rdbuf()->in_avail() != 0)
{
// More information left at end of string.
continue;
}
return date.time_since_epoch();
}
}
return std::nullopt;
}
} // namespace redfish::time_utils
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