Function parseInterval

src/material/timepicker/util.ts:45–75

(value: number | string | null)

/** Parses an interval value into seconds. */
export function parseInterval(value: number | string | null): number | null {
  let result: number;

  if (value === null) {
    return null;
  } else if (typeof value === 'number') {
    result = value;
  } else {
    if (value.trim().length === 0) {
      return null;
    }

    const parsed = value.match(INTERVAL_PATTERN);
    const amount = parsed ? parseFloat(parsed[1]) : null;
    const unit = parsed?.[2]?.toLowerCase() || null;

    if (!parsed || amount === null || isNaN(amount)) {
      return null;
    }

    if (unit === 'h' || unit === 'hour' || unit === 'hours') {
      result = amount * 3600;
    } else if (unit === 'm' || unit === 'min' || unit === 'minute' || unit === 'minutes') {
      result = amount * 60;
    } else {
      result = amount;
    }
  }

  return result;
}

/**
 * Generates the options to show in a timepicker.