1<?php
2/**
3 * Server-side rendering of the `core/query-pagination-previous` block.
4 *
5 * @package WordPress
6 */
7
8/**
9 * Renders the `core/query-pagination-previous` block on the server.
10 *
11 * @since 5.8.0
12 *
13 * @param array $attributes Block attributes.
14 * @param string $content Block default content.
15 * @param WP_Block $block Block instance.
16 *
17 * @return string Returns the previous posts link for the query.
18 */
19function render_block_core_query_pagination_previous( $attributes, $content, $block ) {
20 $page_key = isset( $block->context['queryId'] ) ? 'query-' . $block->context['queryId'] . '-page' : 'query-page';
21 $enhanced_pagination = isset( $block->context['enhancedPagination'] ) && $block->context['enhancedPagination'];
22 $max_page = isset( $block->context['query']['pages'] ) ? (int) $block->context['query']['pages'] : 0;
23 $page = empty( $_GET[ $page_key ] ) ? 1 : (int) $_GET[ $page_key ];
24 $wrapper_attributes = get_block_wrapper_attributes();
25 $show_label = isset( $block->context['showLabel'] ) ? (bool) $block->context['showLabel'] : true;
26 $default_label = __( 'Previous Page' );
27 $label_text = isset( $attributes['label'] ) && ! empty( $attributes['label'] ) ? esc_html( $attributes['label'] ) : $default_label;
28 $label = $show_label ? $label_text : '';
29 $pagination_arrow = get_query_pagination_arrow( $block, false );
30 if ( ! $label ) {
31 $wrapper_attributes .= ' aria-label="' . $label_text . '"';
32 }
33 if ( $pagination_arrow ) {
34 $label = $pagination_arrow . $label;
35 }
36 $content = '';
37 // Check if the pagination is for Query that inherits the global context
38 // and handle appropriately.
39 if ( isset( $block->context['query']['inherit'] ) && $block->context['query']['inherit'] ) {
40 $filter_link_attributes = static function () use ( $wrapper_attributes ) {
41 return $wrapper_attributes;
42 };
43
44 add_filter( 'previous_posts_link_attributes', $filter_link_attributes );
45 $content = get_previous_posts_link( $label );
46 remove_filter( 'previous_posts_link_attributes', $filter_link_attributes );
47 } else {
48 $block_query = new WP_Query( build_query_vars_from_query_block( $block, $page ) );
49 $block_max_pages = $block_query->max_num_pages;
50 $total = ! $max_page || $max_page > $block_max_pages ? $block_max_pages : $max_page;
51 wp_reset_postdata();
52
53 if ( 1 < $page && $page <= $total ) {
54 $content = sprintf(
55 '<a href="%1$s" %2$s>%3$s</a>',
56 esc_url( add_query_arg( $page_key, $page - 1 ) ),
57 $wrapper_attributes,
58 $label
59 );
60 }
61 }
62
63 if ( $enhanced_pagination && isset( $content ) ) {
64 $p = new WP_HTML_Tag_Processor( $content );
65 if ( $p->next_tag(
66 array(
67 'tag_name' => 'a',
68 'class_name' => 'wp-block-query-pagination-previous',
69 )
70 ) ) {
71 $p->set_attribute( 'data-wp-key', 'query-pagination-previous' );
72 $p->set_attribute( 'data-wp-on--click', 'core/query::actions.navigate' );
73 $p->set_attribute( 'data-wp-on--mouseenter', 'core/query::actions.prefetch' );
74 $p->set_attribute( 'data-wp-watch', 'core/query::callbacks.prefetch' );
75 $content = $p->get_updated_html();
76 }
77 }
78
79 return $content;
80}
81
82/**
83 * Registers the `core/query-pagination-previous` block on the server.
84 *
85 * @since 5.8.0
86 */
87function register_block_core_query_pagination_previous() {
88 register_block_type_from_metadata(
89 __DIR__ . '/query-pagination-previous',
90 array(
91 'render_callback' => 'render_block_core_query_pagination_previous',
92 )
93 );
94}
95add_action( 'init', 'register_block_core_query_pagination_previous' );
96