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import React from 'react';
import type {DateTime} from '@gravity-ui/date-utils';
import {ChevronLeft, ChevronRight} from '@gravity-ui/icons';
import {ArrowToggle, Button, useLang, useMobile} from '@gravity-ui/uikit';
import {block} from '../../utils/cn';
import type {AccessibilityProps, DomProps, FocusEvents, StyleProps} from '../types';
import {formatDateTime} from '../utils/dates';
import type {RangeCalendarState} from './hooks/types';
import {useCalendarCellProps} from './hooks/useCalendarCellProps';
import {useCalendarGridProps} from './hooks/useCalendarGridProps';
import {useCalendarProps} from './hooks/useCalendarProps';
import type {CalendarState} from './hooks/useCalendarState';
import {calendarLayouts, getDaysInPeriod, getWeekDays} from './utils';
import './Calendar.scss';
const b = block('calendar');
export type CalendarSize = 'm' | 'l' | 'xl';
export interface CalendarInstance {
focus: () => void;
}
export interface CalendarViewProps extends DomProps, StyleProps, FocusEvents, AccessibilityProps {
state: CalendarState | RangeCalendarState;
/**
* The size of the element.
* @default m
*/
size?: CalendarSize;
}
export const CalendarView = React.forwardRef<CalendarInstance, CalendarViewProps>(function Calendar(
props: CalendarViewProps,
ref,
) {
const {state} = props;
const {calendarProps, modeButtonProps, nextButtonProps, previousButtonProps} = useCalendarProps(
props,
state,
);
const isMobile = useMobile();
const buttonView = isMobile ? 'outlined' : 'flat';
React.useImperativeHandle(ref, () => ({
focus() {
state.setFocused(true);
},
}));
return (
<div
{...calendarProps}
className={b({size: props.size}, props.className)}
style={props.style}
>
<div className={b('header')}>
<Button {...modeButtonProps} view={buttonView} size={props.size}>
{state.availableModes.indexOf(state.mode) + 1 ===
state.availableModes.length ? (
<span key="label" className={b('mode-label', b(`years-label`))}>
{modeButtonProps.children}
</span>
) : (
[
<span key="label" className={b('mode-label')}>
{modeButtonProps.children}
</span>,
<Button.Icon key="icon">
<ArrowToggle direction="bottom" />
</Button.Icon>,
]
)}
</Button>
<div className={b('controls')}>
<Button {...previousButtonProps} view={buttonView} size={props.size}>
<Button.Icon>
<ChevronLeft className={b('control-icon')} />
</Button.Icon>
</Button>
<Button {...nextButtonProps} view={buttonView} size={props.size}>
<Button.Icon>
<ChevronRight className={b('control-icon')} />
</Button.Icon>
</Button>
</div>
</div>
<CalendarGrid state={state} />
</div>
);
});
interface CalendarGridProps {
state: CalendarState | RangeCalendarState;
}
function CalendarGrid({state}: CalendarGridProps) {
const [prevState, setPrevState] = React.useState(() => ({...state, isFocused: false}));
const modeChanged = state.mode !== prevState.mode;
const startDateChanged = !state.startDate.isSame(prevState.startDate, 'days');
let animation;
Iif (modeChanged) {
if (calendarLayouts.indexOf(prevState.mode) > calendarLayouts.indexOf(state.mode)) {
animation = 'zoom-out';
} else {
animation = 'zoom-in';
}
} else if (startDateChanged) {
if (state.startDate.isBefore(prevState.startDate)) {
animation = 'forward';
} else {
animation = 'backward';
}
}
const {gridProps} = useCalendarGridProps(state);
return (
<div className={b('grid')} {...gridProps}>
{animation && (
<Content className={b('previous-state')} state={prevState} animation={animation} />
)}
<Content
key="current"
className={b('current-state')}
state={state}
animation={animation}
onAnimationEnd={() => {
setPrevState({...state, isFocused: false});
}}
/>
</div>
);
}
interface ContentProps {
className?: string;
animation?: string;
onAnimationEnd?: () => void;
state: CalendarState | RangeCalendarState;
}
function Content({className, state, animation, onAnimationEnd}: ContentProps) {
return (
<div
className={b('content', {animation}, className)}
onAnimationEnd={onAnimationEnd}
role="presentation"
>
{state.mode === 'days' && <Weekdays state={state} />}
<CalendarGridCells state={state} />
</div>
);
}
interface WeekdaysProps {
state: CalendarState | RangeCalendarState;
}
function Weekdays({state}: WeekdaysProps) {
const weekdays = getWeekDays(state);
const {lang} = useLang();
return (
<div className={b('grid-row')} role="row">
{weekdays.map((date) => {
return (
<div
key={date.day()}
className={b('weekday', {weekend: state.isWeekend(date)})}
role="columnheader"
aria-label={formatDateTime(date, 'dddd', state.timeZone, lang)}
>
{formatDateTime(date, 'dd', state.timeZone, lang)}
</div>
);
})}
</div>
);
}
interface CalendarGridProps {
state: CalendarState | RangeCalendarState;
}
function CalendarGridCells({state}: CalendarGridProps) {
const rowsInPeriod = state.mode === 'days' ? 6 : 4;
const columnsInRow = state.mode === 'days' ? 7 : 3 + (state.mode === 'quarters' ? 1 : 0);
const days = getDaysInPeriod(state);
const {lang} = useLang();
return (
<div className={b('grid-rowgroup', {mode: state.mode})} role="rowgroup">
{[...new Array(rowsInPeriod).keys()].map((rowIndex) => (
<div key={rowIndex} className={b('grid-row')} role="row">
{state.mode === 'quarters' ? (
<span role="rowheader" className={b('grid-rowgroup-header')}>
{formatDateTime(
days[rowIndex * columnsInRow],
'YYYY',
state.timeZone,
lang,
)}
</span>
) : null}
{days
.slice(rowIndex * columnsInRow, (rowIndex + 1) * columnsInRow)
.map((date) => {
return <CalendarCell key={date.unix()} date={date} state={state} />;
})}
</div>
))}
</div>
);
}
interface CalendarCellProps {
date: DateTime;
state: CalendarState | RangeCalendarState;
}
function CalendarCell({date, state}: CalendarCellProps) {
const {
cellProps,
buttonProps,
formattedDate,
isDisabled,
isSelected,
isRangeSelection,
isSelectionStart,
isSelectionEnd,
isOutsideCurrentRange,
isUnavailable,
isCurrent,
isWeekend,
} = useCalendarCellProps(date, state);
return (
<div {...cellProps}>
<div
{...buttonProps}
className={b('button', {
disabled: isDisabled,
selected: isSelected,
'range-selection': isRangeSelection,
'selection-start': isSelectionStart,
'selection-end': isSelectionEnd,
'out-of-boundary': isOutsideCurrentRange,
unavailable: isUnavailable,
current: isCurrent,
weekend: isWeekend,
})}
>
{formattedDate}
</div>
</div>
);
}
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