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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;
if ( ! defined( 'ABSPATH' ) ) {
exit( 0 );
}
/**
* 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(
__DIR__,
array(
'render_callback' => __NAMESPACE__ . '\load_assets',
'render_email_callback' => __NAMESPACE__ . '\render_email',
)
);
}
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( __DIR__ );
if ( Blocks::is_amp_request() ) {
return render_amp( $attr );
}
// Enqueue Swiper bundle for dynamic loading
if ( ! is_admin() && ! Blocks::is_amp_request() ) {
enqueue_swiper_library();
}
return $content;
}
/**
* Render slideshow block for email.
*
* @since 15.0
*
* @param string $block_content The original block HTML content.
* @param array $parsed_block The parsed block data including attributes.
* @param object $rendering_context Email rendering context.
*
* @return string
*/
function render_email( $block_content, array $parsed_block, $rendering_context ) {
// Validate input parameters and required dependencies
if ( ! isset( $parsed_block['attrs'] ) || ! is_array( $parsed_block['attrs'] ) ||
! class_exists( '\Automattic\WooCommerce\EmailEditor\Integrations\Utils\Styles_Helper' ) ||
! class_exists( '\Automattic\WooCommerce\EmailEditor\Integrations\Utils\Table_Wrapper_Helper' ) ) {
return '';
}
// Email rendering configuration - only extract values used multiple times
$email_grid_padding_margin = 20; // Total padding/margin space for grid layout
$email_common_margin = 16; // Common margin/padding value used multiple times
$email_cell_padding = 8; // Cell padding used in multiple places
$attr = $parsed_block['attrs'];
// Process images for email rendering
$images = process_slideshow_images_for_email( $attr );
if ( empty( $images ) ) {
return '';
}
// Determine target width from the email layout if available
$target_width = get_email_target_width( $rendering_context );
// Build grid content
$grid_content = '';
$images_per_row = 2; // Two images per row for better email compatibility
$image_width = floor( ( $target_width - $email_grid_padding_margin ) / $images_per_row ); // Account for padding/margins
// Create rows
$image_chunks = array_chunk( $images, $images_per_row );
foreach ( $image_chunks as $row_images ) {
$grid_content .= '<table role="presentation" style="width: 100%; border-collapse: collapse; margin: 0 0 ' . $email_common_margin . 'px 0; table-layout: fixed;"><tr>';
foreach ( $row_images as $image ) {
$grid_content .= sprintf(
'<td style="width: %dpx; padding: %dpx; vertical-align: top; text-align: center; font-family: Arial, sans-serif;">',
$image_width,
$email_cell_padding
);
// Build individual image content
$grid_content .= sprintf(
'<img src="%s" alt="%s" style="width: 100%%; max-width: %dpx; height: auto; display: block; border: 0; margin: 0 auto; border-radius: 4px;" />',
esc_url( $image['url'] ),
esc_attr( $image['alt'] ),
$image_width - $email_common_margin // Account for padding
);
// Add caption if available
if ( ! empty( $image['caption'] ) ) {
$grid_content .= sprintf(
'<p style="margin: 12px 0 0 0; padding: 0; font-size: 14px; color: #666666; line-height: 1.4; text-align: center; font-family: Arial, sans-serif;">%s</p>',
esc_html( wp_strip_all_tags( $image['caption'] ) )
);
}
$grid_content .= '</td>';
}
// Fill remaining cells if odd number of images in last row
$remaining_cells = $images_per_row - count( $row_images );
for ( $i = 0; $i < $remaining_cells; $i++ ) {
$grid_content .= sprintf( '<td style="width: %dpx; padding: %dpx;"></td>', $image_width, $email_cell_padding );
}
$grid_content .= '</tr></table>';
}
// Use Table_Wrapper_Helper for consistent email rendering
$image_table_attrs = array(
'style' => 'margin: ' . $email_common_margin . 'px 0; padding: 0; border-collapse: collapse;',
'width' => $target_width,
);
$html = \Automattic\WooCommerce\EmailEditor\Integrations\Utils\Table_Wrapper_Helper::render_table_wrapper( $grid_content, $image_table_attrs );
// Add margin below the block
$html .= '<div style="margin-bottom: 2em;"></div>';
return $html;
}
/**
* 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( Blocks::get_block_feature( __DIR__ ), $attr, $extras );
return sprintf(
'<div class="%1$s" id="wp-block-jetpack-slideshow__%2$d"><div class="wp-block-jetpack-slideshow_container swiper">%3$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 ) : '',
render_paginator( $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
);
}
/**
* Render blocks paginator section
*
* @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 render_paginator( $ids = array(), $block_ordinal = 0 ) {
$total = count( $ids );
if ( $total < 6 ) {
return bullets( $ids, $block_ordinal );
}
return sprintf(
'<div class="swiper-pagination-simple">%s / %s</div>',
absint( $block_ordinal ),
absint( $total )
);
}
/**
* 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-custom 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;
}
/**
* Enqueue Swiper library assets for dynamic loading.
*
* @return void
*/
function enqueue_swiper_library() {
$swiper_js_path = Jetpack_Gutenberg::get_blocks_directory() . 'swiper.js';
$swiper_css_path = Jetpack_Gutenberg::get_blocks_directory() . 'swiper' . ( is_rtl() ? '.rtl' : '' ) . '.css';
if ( Jetpack_Gutenberg::block_has_asset( $swiper_js_path ) ) {
wp_enqueue_script(
'jetpack-swiper-library',
plugins_url( $swiper_js_path, JETPACK__PLUGIN_FILE ),
array(),
JETPACK__VERSION,
true
);
}
if ( Jetpack_Gutenberg::block_has_asset( $swiper_css_path ) ) {
wp_enqueue_style(
'jetpack-swiper-library',
plugins_url( $swiper_css_path, JETPACK__PLUGIN_FILE ),
array(),
JETPACK__VERSION
);
}
}
/**
* Get target width for email rendering.
*
* @param object $rendering_context Email rendering context.
* @return int Target width in pixels.
*/
function get_email_target_width( $rendering_context ) {
$target_width = 600; // Default
if ( ! empty( $rendering_context ) && is_object( $rendering_context ) && method_exists( $rendering_context, 'get_layout_width_without_padding' ) ) {
$layout_width_px = $rendering_context->get_layout_width_without_padding();
if ( is_string( $layout_width_px ) ) {
$parsed_width = \Automattic\WooCommerce\EmailEditor\Integrations\Utils\Styles_Helper::parse_value( $layout_width_px );
if ( $parsed_width > 0 ) {
$target_width = $parsed_width;
}
}
}
return $target_width;
}
/**
* Process slideshow images for email rendering.
*
* @param array $attr Block attributes containing image data.
* @return array Processed image data for email rendering.
*/
function process_slideshow_images_for_email( $attr ) {
$images = array();
// Get images from IDs (primary data source)
if ( ! empty( $attr['ids'] ) && is_array( $attr['ids'] ) ) {
foreach ( $attr['ids'] as $index => $id ) {
// Validate ID is a positive integer
$id = absint( $id );
if ( ! $id ) {
continue;
}
$image_url = wp_get_attachment_image_url( $id, 'medium' );
// Sanitize alt text from post meta
$alt_text = get_post_meta( $id, '_wp_attachment_image_alt', true );
$alt_text = sanitize_text_field( $alt_text );
// Get caption from attachment post (stored in post_excerpt)
$attachment_post = get_post( $id );
$caption = '';
// First try to get caption from images array if available (with validation)
if ( ! empty( $attr['images'] ) && is_array( $attr['images'] ) && isset( $attr['images'][ $index ]['caption'] ) ) {
$caption = wp_strip_all_tags( $attr['images'][ $index ]['caption'] );
}
// If no caption in images array, get it from attachment post
if ( empty( $caption ) && $attachment_post && ! empty( $attachment_post->post_excerpt ) ) {
$caption = wp_strip_all_tags( $attachment_post->post_excerpt );
}
if ( $image_url ) {
$images[] = array(
'url' => $image_url,
'alt' => $alt_text,
'caption' => $caption,
'id' => $id,
);
}
}
} elseif ( ! empty( $attr['images'] ) && is_array( $attr['images'] ) ) {
// Fall back to images array if IDs aren't available (for testing)
foreach ( $attr['images'] as $image_data ) {
if ( ! empty( $image_data['url'] ) ) {
// Validate and sanitize URL
$url = esc_url_raw( $image_data['url'] );
if ( ! $url || ! wp_http_validate_url( $url ) ) {
continue;
}
// Sanitize alt text
$alt_text = ! empty( $image_data['alt'] ) ? sanitize_text_field( $image_data['alt'] ) : '';
// Sanitize caption
$caption = ! empty( $image_data['caption'] ) ? wp_strip_all_tags( $image_data['caption'] ) : '';
// Validate ID if present
$id = ! empty( $image_data['id'] ) ? absint( $image_data['id'] ) : 0;
$images[] = array(
'url' => $url,
'alt' => $alt_text,
'caption' => $caption,
'id' => $id,
);
}
}
}
return $images;
}