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<?php
/**
* Slideshow Block.
*
* @since 7.1.0
*
* @package automattic/jetpack
*/
namespace Automattic\Jetpack\Extensions\Slideshow;
use Automattic\Jetpack\Blocks;
use Jetpack_Gutenberg;
const FEATURE_NAME = 'slideshow';
const BLOCK_NAME = 'jetpack/' . FEATURE_NAME;
/**
* Registers the block for use in Gutenberg
* This is done via an action so that we can disable
* registration if we need to.
*/
function register_block() {
Blocks::jetpack_register_block(
BLOCK_NAME,
array( 'render_callback' => __NAMESPACE__ . '\load_assets' )
);
}
add_action( 'init', __NAMESPACE__ . '\register_block' );
/**
* Slideshow block registration/dependency declaration.
*
* @param array $attr Array containing the slideshow block attributes.
* @param string $content String containing the slideshow block content.
*
* @return string
*/
function load_assets( $attr, $content ) {
Jetpack_Gutenberg::load_assets_as_required( FEATURE_NAME );
if ( Blocks::is_amp_request() ) {
return render_amp( $attr );
}
return $content;
}
/**
* Render slideshow block for AMP
*
* @param array $attr Array containing the slideshow block attributes.
*
* @return string
*/
function render_amp( $attr ) {
if ( empty( $attr['ids'] ) ) {
return '';
}
static $wp_block_jetpack_slideshow_id = 0;
$wp_block_jetpack_slideshow_id++;
$ids = $attr['ids'];
$autoplay = empty( $attr['autoplay'] ) ? false : true;
$extras = array(
'wp-amp-block',
$autoplay ? 'wp-block-jetpack-slideshow__autoplay' : null,
$autoplay ? 'wp-block-jetpack-slideshow__autoplay-playing' : null,
);
$classes = Blocks::classes( FEATURE_NAME, $attr, $extras );
return sprintf(
'<div class="%1$s" id="wp-block-jetpack-slideshow__%2$d"><div class="wp-block-jetpack-slideshow_container swiper-container">%3$s%4$s%5$s</div></div>',
esc_attr( $classes ),
absint( $wp_block_jetpack_slideshow_id ),
amp_carousel( $attr, $wp_block_jetpack_slideshow_id ),
$autoplay ? autoplay_ui( $wp_block_jetpack_slideshow_id ) : '',
bullets( $ids, $wp_block_jetpack_slideshow_id )
);
}
/**
* Generate amp-carousel markup
*
* @param array $attr Array of block attributes.
* @param int $block_ordinal The ordinal number of the block, used in unique ID.
*
* @return string amp-carousel markup.
*/
function amp_carousel( $attr, $block_ordinal ) {
$ids = empty( $attr['ids'] ) ? array() : $attr['ids'];
$first_image = wp_get_attachment_metadata( $ids[0] );
$delay = empty( $attr['delay'] ) ? 3 : absint( $attr['delay'] );
$autoplay = empty( $attr['autoplay'] ) ? false : $attr['autoplay'];
$width = empty( $first_image['width'] ) ? 800 : $first_image['width'];
$height = empty( $first_image['height'] ) ? 600 : $first_image['height'];
return sprintf(
'<amp-carousel width="%1$d" height="%2$d" layout="responsive" type="slides" data-next-button-aria-label="%3$s" data-prev-button-aria-label="%4$s" controls loop %5$s id="wp-block-jetpack-slideshow__amp-carousel__%6$s" on="slideChange:wp-block-jetpack-slideshow__amp-pagination__%6$s.toggle(index=event.index, value=true)">%7$s</amp-carousel>',
esc_attr( $width ),
esc_attr( $height ),
esc_attr__( 'Next Slide', 'jetpack' ),
esc_attr__( 'Previous Slide', 'jetpack' ),
$autoplay ? 'autoplay delay=' . esc_attr( $delay * 1000 ) : '',
absint( $block_ordinal ),
implode( '', slides( $ids, $width, $height ) )
);
}
/**
* Generate array of slides markup
*
* @param array $ids Array of image ids.
* @param int $width Width of the container.
* @param int $height Height of the container.
*
* @return array Array of slides markup.
*/
function slides( $ids = array(), $width = 400, $height = 300 ) {
return array_map(
function ( $id ) use ( $width, $height ) {
$caption = wp_get_attachment_caption( $id );
$figcaption = $caption ? sprintf(
'<figcaption class="wp-block-jetpack-slideshow_caption gallery-caption">%s</figcaption>',
wp_kses_post( $caption )
) : '';
$image = wp_get_attachment_image(
$id,
array( $width, $height ),
false,
array(
'class' => 'wp-block-jetpack-slideshow_image',
'object-fit' => 'contain',
)
);
return sprintf(
'<div class="wp-block-jetpack-slideshow_slide"><figure>%s%s</figure></div>',
$image,
$figcaption
);
},
$ids
);
}
/**
* Generate array of bullets markup
*
* @param array $ids Array of image ids.
* @param int $block_ordinal The ordinal number of the block, used in unique ID.
*
* @return array Array of bullets markup.
*/
function bullets( $ids = array(), $block_ordinal = 0 ) {
$buttons = array_map(
function ( $index ) {
$aria_label = sprintf(
/* translators: %d: Slide number. */
__( 'Go to slide %d', 'jetpack' ),
absint( $index + 1 )
);
return sprintf(
'<button option="%d" class="swiper-pagination-bullet" tabindex="0" role="button" aria-label="%s" %s></button>',
absint( $index ),
esc_attr( $aria_label ),
0 === $index ? 'selected' : ''
);
},
array_keys( $ids )
);
return sprintf(
'<amp-selector id="wp-block-jetpack-slideshow__amp-pagination__%1$d" class="wp-block-jetpack-slideshow_pagination swiper-pagination swiper-pagination-bullets amp-pagination" on="select:wp-block-jetpack-slideshow__amp-carousel__%1$d.goToSlide(index=event.targetOption)" layout="container">%2$s</amp-selector>',
absint( $block_ordinal ),
implode( '', $buttons )
);
}
/**
* Generate autoplay play/pause UI.
*
* @param int $block_ordinal The ordinal number of the block, used in unique ID.
*
* @return string Autoplay UI markup.
*/
function autoplay_ui( $block_ordinal = 0 ) {
$block_id = sprintf(
'wp-block-jetpack-slideshow__%d',
absint( $block_ordinal )
);
$amp_carousel_id = sprintf(
'wp-block-jetpack-slideshow__amp-carousel__%d',
absint( $block_ordinal )
);
$autoplay_pause = sprintf(
'<a aria-label="%s" class="wp-block-jetpack-slideshow_button-pause" role="button" on="tap:%s.toggleAutoplay(toggleOn=false),%s.toggleClass(class=wp-block-jetpack-slideshow__autoplay-playing,force=false)"></a>',
esc_attr__( 'Pause Slideshow', 'jetpack' ),
esc_attr( $amp_carousel_id ),
esc_attr( $block_id )
);
$autoplay_play = sprintf(
'<a aria-label="%s" class="wp-block-jetpack-slideshow_button-play" role="button" on="tap:%s.toggleAutoplay(toggleOn=true),%s.toggleClass(class=wp-block-jetpack-slideshow__autoplay-playing,force=true)"></a>',
esc_attr__( 'Play Slideshow', 'jetpack' ),
esc_attr( $amp_carousel_id ),
esc_attr( $block_id )
);
return $autoplay_pause . $autoplay_play;
}