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import type { CalendarDay, CalendarWeek } from "react-native-ui-datepicker";
import { Text, View } from "react-native";
import { CalendarNavLeftIcon } from "@repo/ui/icons/CalendarNavLeft";
import { CalendarNavRightIcon } from "@repo/ui/icons/CalendarNavRight";
import { DATE_PICKER_MODE, DATE_PICKER_TIME_SLOT } from "../constants";
import { useStyles } from "../styles";
import type { DatePickerMode, DatePickerTimeSlot } from "../types";
import { isSameDay, normalizeDate } from "../utils";
type DatePickerStyles = ReturnType<typeof useStyles>;
type HalfSelectionSlot = DatePickerTimeSlot | null;
interface UseDatePickerCalendarConfigArgs {
styles: DatePickerStyles;
mode: DatePickerMode;
selectedDays: number;
showTimeOffSection: boolean;
disableStyleTimeSlot: boolean;
tempTimeSlot: DatePickerTimeSlot;
rangeStartTimeSlot: DatePickerTimeSlot;
rangeEndTimeSlot: DatePickerTimeSlot;
normalizedRangeStartDate: Date | null;
normalizedRangeEndDate: Date | null;
navIconColor: string;
onDisplayedMonthDetected: (firstOfMonth: Date) => void;
}
interface ResolveHalfSelectionSlotArgs {
day: CalendarDay;
mode: DatePickerMode;
selectedDays: number;
showTimeOffSection: boolean;
tempTimeSlot: DatePickerTimeSlot;
rangeStartTimeSlot: DatePickerTimeSlot;
rangeEndTimeSlot: DatePickerTimeSlot;
normalizedRangeStartDate: Date | null;
normalizedRangeEndDate: Date | null;
}
const isDayRangeMarker = (day: CalendarDay) => day.isSelected || day.rangeStart || day.rangeEnd;
const isDayHighlighted = (day: CalendarDay) => isDayRangeMarker(day) || day.inMiddle;
const shouldShowHalfSelection = (slot: HalfSelectionSlot) =>
!!slot && slot !== DATE_PICKER_TIME_SLOT.ALL_DAY;
const getHalfSelectionMaskStyle = (
slot: Exclude<HalfSelectionSlot, null>,
styles: DatePickerStyles,
) =>
slot === DATE_PICKER_TIME_SLOT.MORNING
? styles.halfSelectionMaskRight
: styles.halfSelectionMaskLeft;
const resolveHalfSelectionSlot = ({
day,
mode,
selectedDays,
showTimeOffSection,
tempTimeSlot,
rangeStartTimeSlot,
rangeEndTimeSlot,
normalizedRangeStartDate,
normalizedRangeEndDate,
}: ResolveHalfSelectionSlotArgs): HalfSelectionSlot => {
if (!showTimeOffSection) {
return null;
}
if (mode === DATE_PICKER_MODE.SINGLE) {
return day.isSelected ? tempTimeSlot : null;
}
const dayDate = normalizeDate(day.date);
const isStartDay = isSameDay(dayDate, normalizedRangeStartDate);
const isEndDay = isSameDay(dayDate, normalizedRangeEndDate);
if (selectedDays <= 1) {
return isDayRangeMarker(day) || isStartDay ? rangeStartTimeSlot : null;
}
if (day.rangeStart || isStartDay) {
return rangeStartTimeSlot;
}
if (day.rangeEnd || isEndDay) {
return rangeEndTimeSlot;
}
return null;
};
const buildCalendarBaseStyles = (styles: DatePickerStyles) => ({
day: styles.calendarDay,
day_label: styles.calendarDayLabel,
disabled: styles.calendarDisabled,
outside_label: styles.calendarOutsideDayLabel,
weekday_label: styles.calendarWeekdayLabel,
header: styles.calendarHeader,
month_selector: styles.calendarMonthSelector,
year_selector: styles.calendarYearSelector,
month_selector_label: styles.calendarMonthLabel,
year_selector_label: styles.calendarMonthLabel,
button_prev: styles.calendarNavButtonPrev,
button_next: styles.calendarNavButtonNext,
button_prev_image: styles.calendarNavIconPrev,
button_next_image: styles.calendarNavIconNext,
disabled_label: styles.calendarDisabledLabel,
});
export const useDatePickerCalendarConfig = ({
styles,
mode,
selectedDays,
showTimeOffSection,
disableStyleTimeSlot,
tempTimeSlot,
rangeStartTimeSlot,
rangeEndTimeSlot,
normalizedRangeStartDate,
normalizedRangeEndDate,
navIconColor,
onDisplayedMonthDetected,
}: UseDatePickerCalendarConfigArgs) => {
const lastDetectedMonthKeyRef = useRef(0);
const calendarBaseStyles = useMemo(() => buildCalendarBaseStyles(styles), [styles]);
const getHalfSelectionSlot = useCallback(
(day: CalendarDay) =>
resolveHalfSelectionSlot({
day,
mode,
selectedDays,
showTimeOffSection,
tempTimeSlot,
rangeStartTimeSlot,
rangeEndTimeSlot,
normalizedRangeStartDate,
normalizedRangeEndDate,
}),
[
mode,
normalizedRangeEndDate,
normalizedRangeStartDate,
rangeEndTimeSlot,
rangeStartTimeSlot,
selectedDays,
showTimeOffSection,
tempTimeSlot,
],
);
const renderDay = useCallback(
(day: CalendarDay) => {
if (day.isCurrentMonth) {
const dayDate = normalizeDate(day.date);
Eif (dayDate) {
const monthKey = dayDate.getFullYear() * 100 + dayDate.getMonth();
if (monthKey !== lastDetectedMonthKeyRef.current) {
lastDetectedMonthKeyRef.current = monthKey;
onDisplayedMonthDetected(new Date(dayDate.getFullYear(), dayDate.getMonth(), 1));
}
}
}
const halfSelectionSlot = getHalfSelectionSlot(day);
const isDisabledInHighlightedRange = day.isDisabled && isDayHighlighted(day);
const showHalfSelection =
!disableStyleTimeSlot && shouldShowHalfSelection(halfSelectionSlot) && !day.isDisabled;
const halfSelectionMaskStyle =
showHalfSelection && halfSelectionSlot
? getHalfSelectionMaskStyle(halfSelectionSlot, styles)
: null;
const dayLabelStyles = [
styles.customDayLabel,
!day.isCurrentMonth && styles.calendarOutsideDayLabel,
isDayHighlighted(day) && styles.calendarSelectedLabel,
day.isDisabled && styles.calendarDisabledLabel,
];
return (
<View style={styles.customDayContent}>
{isDisabledInHighlightedRange ? <View style={styles.disabledInRangeMask} /> : null}
{showHalfSelection ? (
<View
style={[styles.halfSelectionMask, halfSelectionMaskStyle]}
testID={`half-selection-${day.text}`}
/>
) : null}
<Text style={dayLabelStyles}>{day.text}</Text>
</View>
);
},
[disableStyleTimeSlot, getHalfSelectionSlot, onDisplayedMonthDetected, styles],
);
const renderWeekday = useCallback(
(weekday: CalendarWeek) => {
const isWeekend = weekday.index === 0 || weekday.index === 6;
return (
<Text style={isWeekend ? styles.calendarWeekdayWeekendLabel : styles.calendarWeekdayLabel}>
{weekday.name.short}
</Text>
);
},
[styles],
);
const calendarComponents = useMemo(
() => ({
Day: renderDay,
Weekday: renderWeekday,
IconPrev: <CalendarNavLeftIcon color={navIconColor} />,
IconNext: <CalendarNavRightIcon color={navIconColor} />,
}),
[navIconColor, renderDay, renderWeekday],
);
return {
calendarBaseStyles,
calendarComponents,
};
};
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