All files / packages/ui/src/components/DatePicker/hooks useDatePickerTimeSlot.ts

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import { useCallback } from "react";
import type { DateType } from "react-native-ui-datepicker";
 
import {
  DATE_PICKER_MODE,
  DATE_PICKER_RANGE_SELECTION,
  DATE_PICKER_TIME_SLOT,
} from "../constants";
import type {
  DatePickerMode,
  DatePickerTimeSlot,
  RangeSelectionTarget,
  TempDateRangeValue,
} from "../types";
import { getInclusiveDaysInRange, toRangeValue } from "../utils";
 
import type { DatePickerDraftState } from "./useDatePickerDraftState";
 
type EmitConfirm = (
  nextMode: DatePickerMode,
  nextSingleDate: DateType | null,
  nextRangeDate: TempDateRangeValue,
  nextTimeSlot: DatePickerTimeSlot,
  nextRangeStartTimeSlot: DatePickerTimeSlot,
  nextRangeEndTimeSlot: DatePickerTimeSlot,
  nextActiveRangeSelection: RangeSelectionTarget,
) => void;
 
interface UseDatePickerTimeSlotArgs {
  draftState: DatePickerDraftState;
  mode: DatePickerMode;
  selectedDays: number;
  showTimeOffSection: boolean;
  isRangeWithEndDate: boolean;
  activeRangeSelection: DatePickerDraftState["activeRangeSelection"];
  onTimeSlotChange?: (slot: DatePickerTimeSlot) => void;
  emitConfirm: EmitConfirm;
}
 
interface ResolveConfirmedSlotsArgs {
  mode: DatePickerMode;
  isMultiDayRange: boolean;
  selectionTarget: DatePickerDraftState["activeRangeSelection"];
  nextSlot: DatePickerTimeSlot;
  currentRangeStartSlot: DatePickerTimeSlot;
  currentRangeEndSlot: DatePickerTimeSlot;
  rangeStartTimeSlot: DatePickerTimeSlot;
  rangeEndTimeSlot: DatePickerTimeSlot;
}
 
interface ResolveCurrentSelectionSlotArgs {
  mode: DatePickerMode;
  isMultiDayRange: boolean;
  selectionTarget: DatePickerDraftState["activeRangeSelection"];
  currentTempSlot: DatePickerTimeSlot;
  currentRangeStartSlot: DatePickerTimeSlot;
  currentRangeEndSlot: DatePickerTimeSlot;
}
 
const getBlockedMultiDaySlot = (
  selectionTarget: DatePickerDraftState["activeRangeSelection"],
): DatePickerTimeSlot | null => {
  switch (selectionTarget) {
    case DATE_PICKER_RANGE_SELECTION.END:
      return DATE_PICKER_TIME_SLOT.AFTERNOON;
    case DATE_PICKER_RANGE_SELECTION.START:
      return DATE_PICKER_TIME_SLOT.MORNING;
    default:
      return null;
  }
};
 
const getNextSlot = (
  selectedSlot: DatePickerTimeSlot,
  currentSlot: DatePickerTimeSlot,
): DatePickerTimeSlot => {
  const isTogglingSameHalfSlot =
    selectedSlot !== DATE_PICKER_TIME_SLOT.ALL_DAY &&
    currentSlot === selectedSlot;
 
  return isTogglingSameHalfSlot ? DATE_PICKER_TIME_SLOT.ALL_DAY : selectedSlot;
};
 
const resolveCurrentSelectionSlot = ({
  mode,
  isMultiDayRange,
  selectionTarget,
  currentTempSlot,
  currentRangeStartSlot,
  currentRangeEndSlot,
}: ResolveCurrentSelectionSlotArgs): DatePickerTimeSlot => {
  if (mode !== DATE_PICKER_MODE.RANGE || !isMultiDayRange) {
    return currentTempSlot;
  }
 
  return selectionTarget === DATE_PICKER_RANGE_SELECTION.START
    ? currentRangeStartSlot
    : currentRangeEndSlot;
};
 
const resolveConfirmedSlots = ({
  mode,
  isMultiDayRange,
  selectionTarget,
  nextSlot,
  currentRangeStartSlot,
  currentRangeEndSlot,
  rangeStartTimeSlot,
  rangeEndTimeSlot,
}: ResolveConfirmedSlotsArgs) => {
  Iif (mode !== DATE_PICKER_MODE.RANGE) {
    return {
      confirmedStartSlot: rangeStartTimeSlot,
      confirmedEndSlot: rangeEndTimeSlot,
    };
  }
 
  if (!isMultiDayRange) {
    return {
      confirmedStartSlot: nextSlot,
      confirmedEndSlot: nextSlot,
    };
  }
 
  return {
    confirmedStartSlot:
      selectionTarget === DATE_PICKER_RANGE_SELECTION.END
        ? currentRangeStartSlot
        : nextSlot,
    confirmedEndSlot:
      selectionTarget === DATE_PICKER_RANGE_SELECTION.START
        ? currentRangeEndSlot
        : nextSlot,
  };
};
 
export const useDatePickerTimeSlot = ({
  draftState,
  mode,
  selectedDays,
  showTimeOffSection,
  isRangeWithEndDate,
  activeRangeSelection,
  onTimeSlotChange,
  emitConfirm,
}: UseDatePickerTimeSlotArgs) => {
  const {
    activeRangeSelectionRef,
    beginEditingState,
    rangeEndDateRef,
    rangeEndTimeSlot,
    rangeEndTimeSlotRef,
    rangeStartDateRef,
    rangeStartTimeSlot,
    rangeStartTimeSlotRef,
    setActiveRangeSelection,
    setRangeEndTimeSlot,
    setRangeStartTimeSlot,
    setTempTimeSlot,
    tempDate,
    tempTimeSlotRef,
  } = draftState;
 
  const handleSelectTimeSlot = useCallback(
    (slot: DatePickerTimeSlot) => {
      Iif (!showTimeOffSection || selectedDays <= 0) {
        return;
      }
 
      beginEditingState();
      const currentRange = {
        startDate: rangeStartDateRef.current,
        endDate: rangeEndDateRef.current,
      };
      const nextRangeDate = toRangeValue(currentRange);
      const isMultiDayRange =
        mode === DATE_PICKER_MODE.RANGE &&
        getInclusiveDaysInRange(
          nextRangeDate.startDate,
          nextRangeDate.endDate,
        ) > 1;
      const selectionTarget = activeRangeSelectionRef.current;
      const currentRangeStartSlot = rangeStartTimeSlotRef.current;
      const currentRangeEndSlot = rangeEndTimeSlotRef.current;
      const currentSelectionSlot = resolveCurrentSelectionSlot({
        mode,
        isMultiDayRange,
        selectionTarget,
        currentTempSlot: tempTimeSlotRef.current,
        currentRangeStartSlot,
        currentRangeEndSlot,
      });
      const blockedSlot = isMultiDayRange
        ? getBlockedMultiDaySlot(selectionTarget)
        : null;
 
      Iif (blockedSlot === slot) {
        return;
      }
 
      const nextSlot = getNextSlot(slot, currentSelectionSlot);
 
      setTempTimeSlot(nextSlot);
      tempTimeSlotRef.current = nextSlot;
 
      Eif (mode === DATE_PICKER_MODE.RANGE) {
        if (!isMultiDayRange) {
          setRangeStartTimeSlot(nextSlot);
          rangeStartTimeSlotRef.current = nextSlot;
          setActiveRangeSelection(DATE_PICKER_RANGE_SELECTION.START);
          activeRangeSelectionRef.current = DATE_PICKER_RANGE_SELECTION.START;
        } else {
          const isSelectingRangeStart =
            selectionTarget === DATE_PICKER_RANGE_SELECTION.START;
 
          if (isSelectingRangeStart) {
            setRangeStartTimeSlot(nextSlot);
            rangeStartTimeSlotRef.current = nextSlot;
          } else {
            setRangeEndTimeSlot(nextSlot);
            rangeEndTimeSlotRef.current = nextSlot;
          }
        }
      }
 
      onTimeSlotChange?.(nextSlot);
 
      const { confirmedStartSlot, confirmedEndSlot } = resolveConfirmedSlots({
        mode,
        isMultiDayRange,
        selectionTarget,
        nextSlot,
        currentRangeStartSlot,
        currentRangeEndSlot,
        rangeStartTimeSlot,
        rangeEndTimeSlot,
      });
 
      emitConfirm(
        mode,
        tempDate,
        nextRangeDate,
        nextSlot,
        confirmedStartSlot,
        confirmedEndSlot,
        activeRangeSelectionRef.current,
      );
    },
    [
      activeRangeSelectionRef,
      beginEditingState,
      emitConfirm,
      mode,
      onTimeSlotChange,
      rangeEndTimeSlot,
      rangeEndDateRef,
      rangeEndTimeSlotRef,
      rangeStartTimeSlot,
      rangeStartDateRef,
      rangeStartTimeSlotRef,
      setActiveRangeSelection,
      setRangeEndTimeSlot,
      setRangeStartTimeSlot,
      setTempTimeSlot,
      showTimeOffSection,
      selectedDays,
      tempDate,
      tempTimeSlotRef,
    ],
  );
 
  const isTimeSlotDisabled = useCallback(
    (slot: DatePickerTimeSlot) => {
      if (selectedDays <= 0) {
        return slot !== DATE_PICKER_TIME_SLOT.ALL_DAY;
      }
 
      if (mode !== DATE_PICKER_MODE.RANGE || !isRangeWithEndDate) {
        return false;
      }
 
      return getBlockedMultiDaySlot(activeRangeSelection) === slot;
    },
    [activeRangeSelection, isRangeWithEndDate, mode, selectedDays],
  );
 
  return {
    handleSelectTimeSlot,
    isTimeSlotDisabled,
  };
};