@material-ui/lab/internal/pickers/time-utils.js

Laboratory for new Material-UI modules.

export const getMeridiem = (date, utils) => {
  if (!date) {
    return null;
  }

  return utils.getHours(date) >= 12 ? 'pm' : 'am';
};
export const convertValueToMeridiem = (value, meridiem, ampm) => {
  if (ampm) {
    const currentMeridiem = value >= 12 ? 'pm' : 'am';

    if (currentMeridiem !== meridiem) {
      return meridiem === 'am' ? value - 12 : value + 12;
    }
  }

  return value;
};
export const convertToMeridiem = (time, meridiem, ampm, utils) => {
  const newHoursAmount = convertValueToMeridiem(utils.getHours(time), meridiem, ampm);
  return utils.setHours(time, newHoursAmount);
};
export function getSecondsInDay(date, utils) {
  return utils.getHours(date) * 3600 + utils.getMinutes(date) * 60 + utils.getSeconds(date);
}
export const createIsAfterIgnoreDatePart = (disableIgnoringDatePartForTimeValidation, utils) => (dateLeft, dateRight) => {
  if (disableIgnoringDatePartForTimeValidation) {
    return utils.isAfter(dateLeft, dateRight);
  }

  return getSecondsInDay(dateLeft, utils) > getSecondsInDay(dateRight, utils);
};
export const validateTime = (utils, value, {
  minTime,
  maxTime,
  shouldDisableTime,
  disableIgnoringDatePartForTimeValidation
}) => {
  const date = utils.date(value);
  const isAfterComparingFn = createIsAfterIgnoreDatePart(Boolean(disableIgnoringDatePartForTimeValidation), utils);

  if (value === null) {
    return null;
  }

  switch (true) {
    case !utils.isValid(value):
      return 'invalidDate';

    case Boolean(minTime && isAfterComparingFn(minTime, date)):
      return 'minTime';

    case Boolean(maxTime && isAfterComparingFn(date, maxTime)):
      return 'maxTime';

    case Boolean(shouldDisableTime && shouldDisableTime(utils.getHours(date), 'hours')):
      return 'shouldDisableTime-hours';

    case Boolean(shouldDisableTime && shouldDisableTime(utils.getMinutes(date), 'minutes')):
      return 'shouldDisableTime-minutes';

    case Boolean(shouldDisableTime && shouldDisableTime(utils.getSeconds(date), 'seconds')):
      return 'shouldDisableTime-seconds';

    default:
      return null;
  }
};