All files / src/components/CalendarView/hooks useRangeCalendarState.ts

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import React from 'react';
 
import type {DateTime} from '@gravity-ui/date-utils';
import {useControlledState} from '@gravity-ui/uikit';
 
import type {RangeValue} from '../../types';
import {constrainValue, mergeDateTime} from '../../utils/dates';
import {useDefaultTimeZone} from '../../utils/useDefaultTimeZone';
 
import type {CalendarLayout, RangeCalendarState} from './types';
import {useCalendarState} from './useCalendarState';
import type {CalendarStateOptions} from './useCalendarState';
 
export interface RangeCalendarStateOptions extends CalendarStateOptions<RangeValue<DateTime>> {}
 
export type {RangeCalendarState} from './types';
 
export function useRangeCalendarState(props: RangeCalendarStateOptions): RangeCalendarState {
    const {value: valueProp, defaultValue = null, onUpdate, ...calendarProps} = props;
    const [value, setValue] = useControlledState(valueProp, defaultValue, onUpdate);
 
    const [anchorDate, setAnchorDateState] = React.useState<DateTime>();
 
    const inputTimeZone = useDefaultTimeZone(
        valueProp?.start || defaultValue?.start || props.focusedValue || props.defaultFocusedValue,
    );
    const timeZone = props.timeZone || inputTimeZone;
 
    const calendar = useCalendarState({...calendarProps, value: null, timeZone});
    const highlightedRange = anchorDate
        ? makeRange(anchorDate, calendar.focusedDate, calendar.mode)
        : ((value &&
              makeRange(
                  value.start.timeZone(timeZone),
                  value.end.timeZone(timeZone),
                  calendar.mode,
              )) ??
          undefined);
 
    const minMode = calendar.availableModes[0];
 
    const handleSetValue = (v: RangeValue<DateTime>) => {
        let {start, end} = v;
        if (value) {
            start = mergeDateTime(start, value.start.timeZone(timeZone));
            end = mergeDateTime(end, value.end.timeZone(timeZone));
        }
        setValue({start: start.timeZone(inputTimeZone), end: end.timeZone(inputTimeZone)});
    };
 
    const selectDate = (date: DateTime, force = false) => {
        if (props.disabled) {
            return;
        }
 
        if (!force && calendar.mode !== minMode) {
            calendar.zoomIn();
            return;
        }
 
        if (props.readOnly) {
            return;
        }
 
        const newDate = constrainValue(date, calendar.minValue, calendar.maxValue);
        if (calendar.isCellUnavailable(newDate)) {
            return;
        }
 
        if (anchorDate) {
            const range = makeRange(anchorDate, newDate, calendar.mode);
            handleSetValue(range);
            setAnchorDateState(undefined);
        } else {
            setAnchorDateState(newDate);
        }
    };
 
    return {
        ...calendar,
        value,
        setValue: handleSetValue,
        selectDate,
        anchorDate,
        setAnchorDate: setAnchorDateState,
        highlightedRange,
        isSelected(date) {
            Eif (!highlightedRange) {
                return false;
            }
 
            return (
                (date.isSame(highlightedRange.start, this.mode) ||
                    date.isAfter(highlightedRange.start)) &&
                (date.isSame(highlightedRange.end, this.mode) ||
                    date.isBefore(highlightedRange.end))
            );
        },
        highlightDate(date) {
            if (anchorDate) {
                this.setFocusedDate(date);
            }
        },
    };
}
 
function makeRange(start: DateTime, end: DateTime, mode: CalendarLayout): RangeValue<DateTime> {
    if (start.isBefore(end)) {
        return {
            start,
            end: end.endOf(mode),
        };
    }
 
    return {
        start: end,
        end: start.endOf(mode),
    };
}