Utilities

The package exports two utilities that are useful when you want booking-aware logic outside the UI components.

getProtectedTime

import {
  getProtectedTime,
  type CalendarReserved,
} from "@demark-pro/react-booking-calendar";

const reserved = [
  {
    startDate: new Date(2030, 4, 12, 14, 0),
    endDate: new Date(2030, 4, 14, 10, 0),
  },
];

const result = getProtectedTime(new Date(2030, 4, 12), reserved);

Returns:

type GetProtectedTimeReturn = {
  startDate: Date;
  endDate: Date;
};

Use it when you want to snap a selected day to the protected reservation boundaries.

getProtectedInterval

import {
  getProtectedInterval,
  type CalendarDayState,
} from "@demark-pro/react-booking-calendar";

const result = getProtectedInterval(date, state, {
  selected,
  reserved,
  disabled,
  protection,
  range,
  isStart,
  options,
  getClassNames,
});

Returns:

type GetProtectedIntervalReturn = {
  interval: CalendarSelected[] | null;
  overbookType: OverbookTypes | null;
};

Use it when you need to mirror the calendar selection rules in a higher-level booking flow, analytics layer, or custom interaction surface.

Which one to use

• Use getProtectedTime when you already know the day and only need protected check-in or check-out boundaries.
• Use getProtectedInterval when you want the same accept-or-reject decision that the calendar uses while handling clicks.