Function buildRangeBounds

packages/emcn/src/components/calendar/calendar.tsx:132–158

(
  start: Date,
  end: Date,
  options: { showTime: boolean; startTime: string; endTime: string }
)

 * times are swapped when inverted so the range never ends before it starts.
 */
export function buildRangeBounds(
  start: Date,
  end: Date,
  options: { showTime: boolean; startTime: string; endTime: string }
): { start: string; end: string } {
  const ordered = end < start ? { start: end, end: start } : { start, end }
  const startStr = toDateString(
    ordered.start.getFullYear(),
    ordered.start.getMonth(),
    ordered.start.getDate()
  )
  const endStr = toDateString(
    ordered.end.getFullYear(),
    ordered.end.getMonth(),
    ordered.end.getDate()
  )

  if (!options.showTime) return { start: startStr, end: endStr }

  let startTime = options.startTime
  let endTime = options.endTime
  if (startStr === endStr && startTime > endTime) {
    startTime = options.endTime
    endTime = options.startTime
  }
  return { start: `${startStr}T${startTime}`, end: `${endStr}T${endTime}:59` }
}

interface CalendarBaseProps {
  /** Forwarded to the root grid container. */