<?php

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/**

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* Slideshow Block.

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*

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* @since 7.1.0

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*

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* @package automattic/jetpack

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*/

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namespace Automattic\Jetpack\Extensions\Slideshow;

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use Automattic\Jetpack\Blocks;

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use Jetpack_Gutenberg;

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if ( ! defined( 'ABSPATH' ) ) {

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exit( 0 );

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}

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/**

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* Registers the block for use in Gutenberg

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* This is done via an action so that we can disable

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* registration if we need to.

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*/

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function register_block() {

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Blocks::jetpack_register_block(

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__DIR__,

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array(

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'render_callback' => __NAMESPACE__ . '\load_assets',

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'render_email_callback' => __NAMESPACE__ . '\render_email',

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)

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);

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}

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add_action( 'init', __NAMESPACE__ . '\register_block' );

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/**

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* Slideshow block registration/dependency declaration.

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*

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* @param array $attr Array containing the slideshow block attributes.

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* @param string $content String containing the slideshow block content.

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*

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* @return string

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*/

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function load_assets( $attr, $content ) {

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Jetpack_Gutenberg::load_assets_as_required( __DIR__ );

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if ( Blocks::is_amp_request() ) {

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return render_amp( $attr );

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}

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// Enqueue Swiper bundle for dynamic loading

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if ( ! is_admin() && ! Blocks::is_amp_request() ) {

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enqueue_swiper_library();

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}

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// Fix for lazy loading conflict with slideshow images.

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if ( ! is_admin() ) {

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add_filter(

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'wp_content_img_tag',

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function ( $image ) {

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if ( str_contains( $image, 'loading="lazy"' ) && str_contains( $image, 'wp-block-jetpack-slideshow_image' ) ) {

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$image = str_replace( 'sizes="auto, ', 'sizes="', $image );

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}

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return $image;

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}

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);

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}

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return $content;

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}

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/**

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* Render slideshow block for email.

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*

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* @since 15.0

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*

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* @param string $block_content The original block HTML content.

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* @param array $parsed_block The parsed block data including attributes.

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* @param object $rendering_context Email rendering context.

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*

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* @return string

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*/

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function render_email( $block_content, array $parsed_block, $rendering_context ) {

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// Validate input parameters and required dependencies

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if ( ! isset( $parsed_block['attrs'] ) || ! is_array( $parsed_block['attrs'] ) ||

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! class_exists( '\Automattic\WooCommerce\EmailEditor\Integrations\Core\Renderer\Blocks\Gallery' ) ) {

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return '';

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}

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$attributes = $parsed_block['attrs'];

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// Process images for email rendering

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$images = process_slideshow_images_for_email( $attributes );

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if ( empty( $images ) ) {

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return '';

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}

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// Build innerBlocks that WooCommerce's gallery renderer expects

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// The renderer looks for innerBlocks with blockName 'core/image' and innerHTML

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$inner_blocks = array();

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foreach ( $images as $image ) {

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// Build image HTML in the format that extract_image_from_html() can parse

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$img_html = sprintf(

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'<img src="%s" alt="%s"',

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esc_url( $image['url'] ),

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esc_attr( $image['alt'] )

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);

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if ( ! empty( $image['id'] ) ) {

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$img_html .= sprintf( ' class="wp-image-%d"', absint( $image['id'] ) );

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}

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$img_html .= ' />';

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// Add caption if available (extract_image_from_html looks for figcaption)

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// Preserve HTML in captions - the gallery renderer will sanitize it

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if ( ! empty( $image['caption'] ) ) {

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$img_html .= sprintf(

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'<figcaption>%s</figcaption>',

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wp_kses_post( $image['caption'] )

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);

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}

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// Create inner block structure that the gallery renderer expects

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// The renderer only uses innerHTML, not attrs

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$inner_blocks[] = array(

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'blockName' => 'core/image',

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'innerHTML' => $img_html,

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);

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}

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// Build block content HTML for gallery caption extraction (if needed)

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// The renderer uses $block_content parameter to extract gallery-level captions

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$block_content_html = '<figure class="wp-block-gallery has-nested-images columns-default is-cropped"><ul class="blocks-gallery-grid"></ul></figure>';

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// Create a mock parsed block that WooCommerce's gallery renderer can handle

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// The renderer uses columns from attrs (defaults to 3, but 2 works better for email)

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$mock_parsed_block = array(

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'innerBlocks' => $inner_blocks,

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'attrs' => array(

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'columns' => 2,

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),

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);

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// Preserve email_attrs if present (used for width calculation)

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if ( ! empty( $parsed_block['email_attrs'] ) ) {

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$mock_parsed_block['email_attrs'] = $parsed_block['email_attrs'];

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}

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// Use WooCommerce's core gallery renderer

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$woo_gallery_renderer = new \Automattic\WooCommerce\EmailEditor\Integrations\Core\Renderer\Blocks\Gallery();

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return $woo_gallery_renderer->render( $block_content_html, $mock_parsed_block, $rendering_context );

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}

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/**

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* Render slideshow block for AMP

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*

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* @param array $attr Array containing the slideshow block attributes.

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*

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* @return string

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*/

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function render_amp( $attr ) {

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if ( empty( $attr['ids'] ) ) {

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return '';

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}

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static $wp_block_jetpack_slideshow_id = 0;

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++$wp_block_jetpack_slideshow_id;

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$ids = $attr['ids'];

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$autoplay = empty( $attr['autoplay'] ) ? false : true;

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$extras = array(

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'wp-amp-block',

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$autoplay ? 'wp-block-jetpack-slideshow__autoplay' : null,

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$autoplay ? 'wp-block-jetpack-slideshow__autoplay-playing' : null,

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);

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$classes = Blocks::classes( Blocks::get_block_feature( __DIR__ ), $attr, $extras );

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return sprintf(

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'<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>',

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esc_attr( $classes ),

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absint( $wp_block_jetpack_slideshow_id ),

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amp_carousel( $attr, $wp_block_jetpack_slideshow_id ),

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$autoplay ? autoplay_ui( $wp_block_jetpack_slideshow_id ) : '',

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render_paginator( $ids, $wp_block_jetpack_slideshow_id )

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);

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}

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/**

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* Generate amp-carousel markup

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*

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* @param array $attr Array of block attributes.

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* @param int $block_ordinal The ordinal number of the block, used in unique ID.

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*

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* @return string amp-carousel markup.

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*/

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function amp_carousel( $attr, $block_ordinal ) {

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$ids = empty( $attr['ids'] ) ? array() : $attr['ids'];

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$first_image = wp_get_attachment_metadata( $ids[0] );

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$delay = empty( $attr['delay'] ) ? 3 : absint( $attr['delay'] );

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$autoplay = empty( $attr['autoplay'] ) ? false : $attr['autoplay'];

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$width = empty( $first_image['width'] ) ? 800 : $first_image['width'];

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$height = empty( $first_image['height'] ) ? 600 : $first_image['height'];

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return sprintf(

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'<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>',

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esc_attr( $width ),

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esc_attr( $height ),

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esc_attr__( 'Next Slide', 'jetpack' ),

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esc_attr__( 'Previous Slide', 'jetpack' ),

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$autoplay ? 'autoplay delay=' . esc_attr( $delay * 1000 ) : '',

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absint( $block_ordinal ),

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implode( '', slides( $ids, $width, $height ) )

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);

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}

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/**

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* Generate array of slides markup

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*

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* @param array $ids Array of image ids.

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* @param int $width Width of the container.

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* @param int $height Height of the container.

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*

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* @return array Array of slides markup.

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*/

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function slides( $ids = array(), $width = 400, $height = 300 ) {

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return array_map(

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function ( $id ) use ( $width, $height ) {

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$caption = wp_get_attachment_caption( $id );

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$figcaption = $caption ? sprintf(

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'<figcaption class="wp-block-jetpack-slideshow_caption gallery-caption">%s</figcaption>',

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wp_kses_post( $caption )

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) : '';

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$image = wp_get_attachment_image(

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$id,

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array( $width, $height ),

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false,

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array(

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'class' => 'wp-block-jetpack-slideshow_image',

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'object-fit' => 'contain',

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)

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);

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return sprintf(

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'<div class="wp-block-jetpack-slideshow_slide"><figure>%s%s</figure></div>',

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$image,

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$figcaption

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);

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},

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$ids

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);

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}

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/**

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* Render blocks paginator section

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*

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* @param array $ids Array of image ids.

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* @param int $block_ordinal The ordinal number of the block, used in unique ID.

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*

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* @return array Array of bullets markup.

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*/

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function render_paginator( $ids = array(), $block_ordinal = 0 ) {

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$total = count( $ids );

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if ( $total < 6 ) {

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return bullets( $ids, $block_ordinal );

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}

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return sprintf(

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'<div class="swiper-pagination-simple">%s / %s</div>',

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absint( $block_ordinal ),

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absint( $total )

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);

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}

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/**

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* Generate array of bullets markup

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*

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* @param array $ids Array of image ids.

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* @param int $block_ordinal The ordinal number of the block, used in unique ID.

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*

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* @return array Array of bullets markup.

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*/

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function bullets( $ids = array(), $block_ordinal = 0 ) {

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$buttons = array_map(

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function ( $index ) {

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$aria_label = sprintf(

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/* translators: %d: Slide number. */

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__( 'Go to slide %d', 'jetpack' ),

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absint( $index + 1 )

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);

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return sprintf(

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'<button option="%d" class="swiper-pagination-bullet" tabindex="0" role="button" aria-label="%s" %s></button>',

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absint( $index ),

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esc_attr( $aria_label ),

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0 === $index ? 'selected' : ''

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);

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},

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array_keys( $ids )

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);

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return sprintf(

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'<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>',

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absint( $block_ordinal ),

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implode( '', $buttons )

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);

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}

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/**

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* Generate autoplay play/pause UI.

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*

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* @param int $block_ordinal The ordinal number of the block, used in unique ID.

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*

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* @return string Autoplay UI markup.

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*/

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function autoplay_ui( $block_ordinal = 0 ) {

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$block_id = sprintf(

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'wp-block-jetpack-slideshow__%d',

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absint( $block_ordinal )

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);

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$amp_carousel_id = sprintf(

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'wp-block-jetpack-slideshow__amp-carousel__%d',

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absint( $block_ordinal )

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);

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$autoplay_pause = sprintf(

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'<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>',

[323] Fix | Delete

esc_attr__( 'Pause Slideshow', 'jetpack' ),

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esc_attr( $amp_carousel_id ),

[325] Fix | Delete

esc_attr( $block_id )

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);

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$autoplay_play = sprintf(

[328] Fix | Delete

'<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>',

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esc_attr__( 'Play Slideshow', 'jetpack' ),

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esc_attr( $amp_carousel_id ),

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esc_attr( $block_id )

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);

[333] Fix | Delete

return $autoplay_pause . $autoplay_play;

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}

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[336] Fix | Delete

/**

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* Enqueue Swiper library assets for dynamic loading.

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*

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* @return void

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*/

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function enqueue_swiper_library() {

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$swiper_js_path = Jetpack_Gutenberg::get_blocks_directory() . 'swiper.js';

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$swiper_css_path = Jetpack_Gutenberg::get_blocks_directory() . 'swiper' . ( is_rtl() ? '.rtl' : '' ) . '.css';

[344] Fix | Delete

[345] Fix | Delete

if ( Jetpack_Gutenberg::block_has_asset( $swiper_js_path ) ) {

[346] Fix | Delete

wp_enqueue_script(

[347] Fix | Delete

'jetpack-swiper-library',

[348] Fix | Delete

plugins_url( $swiper_js_path, JETPACK__PLUGIN_FILE ),

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array(),

[350] Fix | Delete

JETPACK__VERSION,

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true

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);

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}

[354] Fix | Delete

[355] Fix | Delete

if ( Jetpack_Gutenberg::block_has_asset( $swiper_css_path ) ) {

[356] Fix | Delete

wp_enqueue_style(

[357] Fix | Delete

'jetpack-swiper-library',

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plugins_url( $swiper_css_path, JETPACK__PLUGIN_FILE ),

[359] Fix | Delete

array(),

[360] Fix | Delete

JETPACK__VERSION

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);

[362] Fix | Delete

}

[363] Fix | Delete

}

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[365] Fix | Delete

/**

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* Process slideshow images for email rendering.

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*

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* @param array $attr Block attributes containing image data.

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* @return array Processed image data for email rendering.

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*/

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function process_slideshow_images_for_email( $attr ) {

[372] Fix | Delete

$images = array();

[373] Fix | Delete

[374] Fix | Delete

// Get images from IDs (primary data source)

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if ( ! empty( $attr['ids'] ) && is_array( $attr['ids'] ) ) {

[376] Fix | Delete

foreach ( $attr['ids'] as $index => $id ) {

[377] Fix | Delete

// Validate ID is a positive integer

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$id = absint( $id );

[379] Fix | Delete

if ( ! $id ) {

[380] Fix | Delete

continue;

[381] Fix | Delete

}

[382] Fix | Delete

[383] Fix | Delete

$image_url = wp_get_attachment_image_url( $id, 'medium' );

[384] Fix | Delete

[385] Fix | Delete

// Sanitize alt text from post meta

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$alt_text = get_post_meta( $id, '_wp_attachment_image_alt', true );

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$alt_text = sanitize_text_field( $alt_text );

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[389] Fix | Delete

// Get caption from attachment post (stored in post_excerpt)

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$attachment_post = get_post( $id );

[391] Fix | Delete

$caption = '';

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[393] Fix | Delete

// First try to get caption from images array if available (with validation)

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// Preserve HTML in captions - the gallery renderer will sanitize it

[395] Fix | Delete

if ( ! empty( $attr['images'] ) && is_array( $attr['images'] ) && isset( $attr['images'][ $index ]['caption'] ) ) {

[396] Fix | Delete

$caption = wp_kses_post( $attr['images'][ $index ]['caption'] );

[397] Fix | Delete

}

[398] Fix | Delete

[399] Fix | Delete

// If no caption in images array, get it from attachment post

[400] Fix | Delete

if ( empty( $caption ) && $attachment_post && ! empty( $attachment_post->post_excerpt ) ) {

[401] Fix | Delete

$caption = wp_kses_post( $attachment_post->post_excerpt );

[402] Fix | Delete

}

[403] Fix | Delete

[404] Fix | Delete

if ( $image_url ) {

[405] Fix | Delete

$images[] = array(

[406] Fix | Delete

'url' => $image_url,

[407] Fix | Delete

'alt' => $alt_text,

[408] Fix | Delete

'caption' => $caption,

[409] Fix | Delete

'id' => $id,

[410] Fix | Delete

);

[411] Fix | Delete

}

[412] Fix | Delete

}

[413] Fix | Delete

} elseif ( ! empty( $attr['images'] ) && is_array( $attr['images'] ) ) {

[414] Fix | Delete

// Fall back to images array if IDs aren't available (for edge cases/testing)

[415] Fix | Delete

foreach ( $attr['images'] as $image_data ) {

[416] Fix | Delete

if ( ! empty( $image_data['url'] ) ) {

[417] Fix | Delete

// Sanitize URL - esc_url_raw returns empty string for invalid URLs

[418] Fix | Delete

$url = esc_url_raw( $image_data['url'] );

[419] Fix | Delete

if ( ! $url ) {

[420] Fix | Delete

continue;

[421] Fix | Delete

}

[422] Fix | Delete

[423] Fix | Delete

// Sanitize alt text

[424] Fix | Delete

$alt_text = ! empty( $image_data['alt'] ) ? sanitize_text_field( $image_data['alt'] ) : '';

[425] Fix | Delete

[426] Fix | Delete

// Preserve HTML in captions - the gallery renderer will sanitize it

[427] Fix | Delete

$caption = ! empty( $image_data['caption'] ) ? wp_kses_post( $image_data['caption'] ) : '';

[428] Fix | Delete

[429] Fix | Delete

// Validate ID if present

[430] Fix | Delete

$id = ! empty( $image_data['id'] ) ? absint( $image_data['id'] ) : 0;

[431] Fix | Delete

[432] Fix | Delete

$images[] = array(

[433] Fix | Delete

'url' => $url,

[434] Fix | Delete

'alt' => $alt_text,

[435] Fix | Delete

'caption' => $caption,

[436] Fix | Delete

'id' => $id,

[437] Fix | Delete

);

[438] Fix | Delete

}

[439] Fix | Delete

}

[440] Fix | Delete

}

[441] Fix | Delete

[442] Fix | Delete

return $images;

[443] Fix | Delete

}

[444] Fix | Delete

[445] Fix | Delete