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import { Button } from '@wordpress/components';
import { Icon, arrowRight } from '@wordpress/icons';
import clsx from 'clsx';
import { useTranslate, useRtl } from 'i18n-calypso';
import { times } from 'lodash';
import { Children, useState, useEffect, ReactNode } from 'react';
import { Swipeable } from '../swipeable';
import './style.scss';
type ControlsProps = {
showControlLabels?: boolean;
currentPage: number;
numberOfPages: number;
setCurrentPage: ( page: number ) => void;
navArrowSize: number;
tracksPrefix: string;
tracksFn: ( eventName: string, data?: any ) => void;
};
const Controls = ( {
showControlLabels = false,
currentPage,
numberOfPages,
setCurrentPage,
navArrowSize,
tracksPrefix,
tracksFn,
}: ControlsProps ) => {
const translate = useTranslate();
const isRtl = useRtl();
if ( numberOfPages < 2 ) {
return null;
}
const canGoBack = currentPage > 0;
const canGoForward = currentPage < numberOfPages - 1;
return (
<ul className="dot-pager__controls" aria-label={ translate( 'Pager controls' ) }>
{ times( numberOfPages, ( page ) => (
<li key={ `page-${ page }` } aria-current={ page === currentPage ? 'page' : undefined }>
<button
key={ page.toString() }
className={ clsx( 'dot-pager__control-choose-page', {
'dot-pager__control-current': page === currentPage,
} ) }
disabled={ page === currentPage }
aria-label={
translate( 'Page %(page)d of %(numberOfPages)d', {
args: { page: page + 1, numberOfPages },
} ) as string
}
onClick={ () => {
tracksFn( tracksPrefix + '_dot_click', {
current_page: currentPage,
destination_page: page,
} );
setCurrentPage( page );
} }
/>
</li>
) ) }
<li key="dot-pager-prev" className="dot-pager__control-gap">
<button
className="dot-pager__control-prev"
disabled={ ! canGoBack }
aria-label={ translate( 'Previous' ) }
onClick={ () => {
const destinationPage = currentPage - 1;
tracksFn( tracksPrefix + '_prev_arrow_click', {
current_page: currentPage,
destination_page: destinationPage,
} );
setCurrentPage( destinationPage );
} }
>
{ /* The arrowLeft icon isn't as bold as arrowRight, so using the same icon and flipping to make sure they match */ }
<Icon
icon={ arrowRight }
size={ navArrowSize }
fill="currentColor"
style={
/* Flip the icon for languages with LTR direction. */
! isRtl ? { transform: 'scaleX(-1)' } : undefined
}
/>
{ showControlLabels && translate( 'Previous' ) }
</button>
</li>
<li key="dot-pager-next">
<button
className="dot-pager__control-next"
disabled={ ! canGoForward }
aria-label={ translate( 'Next' ) }
onClick={ () => {
const destinationPage = currentPage + 1;
tracksFn( tracksPrefix + '_next_arrow_click', {
current_page: currentPage,
destination_page: destinationPage,
} );
setCurrentPage( destinationPage );
} }
>
{ showControlLabels && translate( 'Next' ) }
<Icon
icon={ arrowRight }
size={ navArrowSize }
fill="currentColor"
style={
/* Flip the icon for languages with RTL direction. */
isRtl ? { transform: 'scaleX(-1)' } : undefined
}
/>
</button>
</li>
</ul>
);
};
type DotPagerProps = {
showControlLabels?: boolean;
hasDynamicHeight?: boolean;
children: ReactNode;
className?: string;
onPageSelected?: ( index: number ) => void;
isClickEnabled?: boolean;
rotateTime?: number;
navArrowSize?: number;
tracksPrefix?: string;
tracksFn?: ( eventName: string, data?: Record< string, unknown > ) => void;
includePreviousButton?: boolean;
includeNextButton?: boolean;
includeFinishButton?: boolean;
onFinish?: () => void;
};
const DotPager = ( {
showControlLabels = false,
hasDynamicHeight = false,
children,
className = '',
onPageSelected,
isClickEnabled = false,
rotateTime = 0,
navArrowSize = 18,
tracksPrefix = '',
tracksFn = () => {},
includePreviousButton = false,
includeNextButton = false,
includeFinishButton = false,
onFinish = () => {},
...props
}: DotPagerProps ) => {
const translate = useTranslate();
// Filter out the empty children
const normalizedChildren = Children.toArray( children ).filter( Boolean );
const [ currentPage, setCurrentPage ] = useState( 0 );
const numPages = Children.count( normalizedChildren );
useEffect( () => {
if ( currentPage >= numPages ) {
setCurrentPage( numPages - 1 );
}
}, [ numPages, currentPage ] );
useEffect( () => {
if ( rotateTime > 0 && numPages > 1 ) {
const timerId = setTimeout( () => {
setCurrentPage( ( currentPage + 1 ) % numPages );
}, rotateTime );
return () => clearTimeout( timerId );
}
}, [ currentPage, numPages, rotateTime ] );
const handleSelectPage = ( index: number ) => {
setCurrentPage( index );
onPageSelected?.( index );
};
return (
<div className={ clsx( 'dot-pager', className ) } { ...props }>
<Controls
showControlLabels={ showControlLabels }
currentPage={ currentPage }
numberOfPages={ numPages }
setCurrentPage={ handleSelectPage }
navArrowSize={ navArrowSize }
tracksPrefix={ tracksPrefix }
tracksFn={ tracksFn }
/>
<Swipeable
hasDynamicHeight={ hasDynamicHeight }
onPageSelect={ handleSelectPage }
currentPage={ currentPage }
pageClassName="dot-pager__page"
containerClassName="dot-pager__pages"
isClickEnabled={ isClickEnabled }
>
{ normalizedChildren }
</Swipeable>
{ includePreviousButton && currentPage !== 0 && (
<Button
className="dot-pager__button dot-pager__button_previous"
onClick={ () => {
const destinationPage = currentPage - 1;
tracksFn( tracksPrefix + '_prev_button_click', {
current_page: currentPage,
destination_page: destinationPage,
} );
setCurrentPage( destinationPage );
} }
>
{ translate( 'Previous' ) }
</Button>
) }
{ includeNextButton && currentPage < numPages - 1 && (
<Button
className="dot-pager__button dot-pager__button_next is-primary"
onClick={ () => {
const destinationPage = currentPage + 1;
tracksFn( tracksPrefix + '_next_button_click', {
current_page: currentPage,
destination_page: destinationPage,
} );
setCurrentPage( destinationPage );
} }
>
{ translate( 'Next' ) }
</Button>
) }
{ includeFinishButton && currentPage === numPages - 1 && (
<Button
className="dot-pager__button dot-pager__button_finish is-primary"
onClick={ () => {
tracksFn( tracksPrefix + '_finish_button_click' );
onFinish();
} }
>
{ translate( 'Done' ) }
</Button>
) }
</div>
);
};
export default DotPager;
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