All files / apps/timeOff/src/screens/ChooseDate/hooks helpers.ts

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import {
  DATE_PICKER_TIME_SLOT,
  type DateRangeValue,
} from '@repo/ui/components/DatePicker';
import { getTimeSlot } from '@repo/ui/components/DatePicker/utils';
import type { QuickSelectValue } from '@repo/ui/components/QuickSelect';
 
import { getPresetDate } from '@repo/utils/date';
import {
  applyTimeSlotsToRange,
  normalizeRangeBySlot,
  type TimeSlotValue,
} from '@repo/utils/timeSlotRange';
 
export interface DatePickerDraftSlotState {
  activeRangeSelection: 'start' | 'end';
  rangeEndTimeSlot: QuickSelectValue['timeSlot'];
  rangeStartTimeSlot: QuickSelectValue['timeSlot'];
  timeSlot: QuickSelectValue['timeSlot'];
}
 
const isSameDay = (startDate: Date | null, endDate: Date | null) =>
  !!startDate &&
  !!endDate &&
  startDate.toDateString() === endDate.toDateString();
 
export const getFallbackValue = (
  referenceDate = getPresetDate(1),
): QuickSelectValue => {
  const timeSlot = DATE_PICKER_TIME_SLOT.ALL_DAY;
  const mappedRange = applyTimeSlotsToRange(
    { startDate: referenceDate, endDate: referenceDate },
    timeSlot,
    timeSlot,
  );
 
  return {
    startDate: mappedRange.startDate,
    endDate: mappedRange.endDate,
    timeSlot,
  };
};
 
export const toDateSelectionValue = (
  startDate: Date | null,
  endDate: Date | null,
  timeSlot: QuickSelectValue['timeSlot'],
): QuickSelectValue => {
  const normalized = normalizeRangeBySlot(
    startDate,
    endDate,
    (timeSlot || DATE_PICKER_TIME_SLOT.ALL_DAY) as TimeSlotValue,
  );
 
  return {
    startDate: normalized.startDate,
    endDate: normalized.endDate,
    timeSlot,
  };
};
 
export const toDatePickerRange = (value: QuickSelectValue): DateRangeValue => ({
  startDate: value.startDate,
  endDate: value.endDate,
});
 
const toDateTime = (value: Date | null) => (value ? value.getTime() : null);
 
export const isSameQuickSelectValue = (
  left: QuickSelectValue | null,
  right: QuickSelectValue | null,
) => {
  if (!left || !right) {
    return left === right;
  }
 
  return (
    toDateTime(left.startDate) === toDateTime(right.startDate) &&
    toDateTime(left.endDate) === toDateTime(right.endDate) &&
    left.timeSlot === right.timeSlot
  );
};
 
export const getTimeSlotOrDefault = (
  startDate: Date | null,
  endDate: Date | null,
) =>
  (startDate && endDate ? getTimeSlot(startDate, endDate) : null) ||
  DATE_PICKER_TIME_SLOT.ALL_DAY;
 
const getDatePickerActiveTimeSlot = (
  startDate: Date | null,
  endDate: Date | null,
  fallbackTimeSlot: QuickSelectValue['timeSlot'],
) => {
  if (!startDate || !endDate) {
    return fallbackTimeSlot || DATE_PICKER_TIME_SLOT.ALL_DAY;
  }
 
  if (isSameDay(startDate, endDate)) {
    return getTimeSlotOrDefault(startDate, endDate);
  }
 
  return endDate.getHours() === 12 && endDate.getMinutes() === 0
    ? DATE_PICKER_TIME_SLOT.MORNING
    : DATE_PICKER_TIME_SLOT.ALL_DAY;
};
 
export const getDraftSlotState = (
  startDate: Date | null,
  endDate: Date | null,
  fallbackTimeSlot: QuickSelectValue['timeSlot'],
): DatePickerDraftSlotState => {
  const resolvedTimeSlot = getDatePickerActiveTimeSlot(
    startDate,
    endDate,
    fallbackTimeSlot,
  );
 
  if (!startDate || !endDate || isSameDay(startDate, endDate)) {
    return {
      activeRangeSelection: 'start',
      rangeEndTimeSlot: resolvedTimeSlot,
      rangeStartTimeSlot: resolvedTimeSlot,
      timeSlot: resolvedTimeSlot,
    };
  }
 
  const rangeStartTimeSlot =
    startDate.getHours() === 13 && startDate.getMinutes() === 30
      ? DATE_PICKER_TIME_SLOT.AFTERNOON
      : DATE_PICKER_TIME_SLOT.ALL_DAY;
  const rangeEndTimeSlot =
    endDate.getHours() === 12 && endDate.getMinutes() === 0
      ? DATE_PICKER_TIME_SLOT.MORNING
      : DATE_PICKER_TIME_SLOT.ALL_DAY;
  const activeRangeSelection =
    rangeEndTimeSlot !== DATE_PICKER_TIME_SLOT.ALL_DAY ? 'end' : 'start';
 
  return {
    activeRangeSelection,
    rangeEndTimeSlot,
    rangeStartTimeSlot,
    timeSlot:
      activeRangeSelection === 'start' ? rangeStartTimeSlot : rangeEndTimeSlot,
  };
};