DateTimeValidator.cpp

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#include "MantidKernel/DateTimeValidator.h"
#include "MantidKernel/DateAndTimeHelpers.h"
#include "MantidKernel/System.h"
 
#include <memory>
#include <stdexcept>
 
namespace Mantid::Kernel {
 
using namespace DateAndTimeHelpers;
IValidator_sptr DateTimeValidator::clone() const { return std::make_shared<DateTimeValidator>(*this); }
 
DateTimeValidator::DateTimeValidator() { m_allowedEmpty = false; }
 
void DateTimeValidator::allowEmpty(const bool &allow) { m_allowedEmpty = allow; }
 
std::string DateTimeValidator::checkValidity(const std::string &value) const {
  // simply pass off the work DateAndTime constructor
  // the DateAndTimeHelpers::stringIsISO8601 does not seem strict enough, it
  // accepts empty strings & strings of letters!
  if (m_allowedEmpty && value.empty()) {
    return "";
  } else {
    std::string error;
    try {
      Types::Core::DateAndTime timestamp(value);
      UNUSED_ARG(timestamp);
    } catch (std::invalid_argument &exc) {
      error = exc.what();
    }
    return error;
  }
}
} // namespace Mantid::Kernel