1<?php
  2/**
  3 * Server-side rendering of the `core/latest-posts` block.
  4 *
  5 * @package WordPress
  6 */
  7
  8/**
  9 * The excerpt length set by the Latest Posts core block
 10 * set at render time and used by the block itself.
 11 *
 12 * @var int
 13 */
 14global $block_core_latest_posts_excerpt_length;
 15$block_core_latest_posts_excerpt_length = 0;
 16
 17/**
 18 * Callback for the excerpt_length filter used by
 19 * the Latest Posts block at render time.
 20 *
 21 * @since 5.4.0
 22 *
 23 * @return int Returns the global $block_core_latest_posts_excerpt_length variable
 24 *             to allow the excerpt_length filter respect the Latest Block setting.
 25 */
 26function block_core_latest_posts_get_excerpt_length() {
 27	global $block_core_latest_posts_excerpt_length;
 28	return $block_core_latest_posts_excerpt_length;
 29}
 30
 31/**
 32 * Renders the `core/latest-posts` block on server.
 33 *
 34 * @since 5.0.0
 35 *
 36 * @global WP_Post $post                                   Global post object.
 37 * @global int     $block_core_latest_posts_excerpt_length Excerpt length set by the Latest Posts core block.
 38 *
 39 * @param array $attributes The block attributes.
 40 *
 41 * @return string Returns the post content with latest posts added.
 42 */
 43function render_block_core_latest_posts( $attributes ) {
 44	global $post, $block_core_latest_posts_excerpt_length;
 45
 46	$args = array(
 47		'posts_per_page'      => $attributes['postsToShow'],
 48		'post_status'         => 'publish',
 49		'order'               => $attributes['order'],
 50		'orderby'             => $attributes['orderBy'],
 51		'ignore_sticky_posts' => true,
 52		'no_found_rows'       => true,
 53	);
 54
 55	$block_core_latest_posts_excerpt_length = $attributes['excerptLength'];
 56	add_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );
 57
 58	if ( ! empty( $attributes['categories'] ) ) {
 59		$args['category__in'] = array_column( $attributes['categories'], 'id' );
 60	}
 61	if ( isset( $attributes['selectedAuthor'] ) ) {
 62		$args['author'] = $attributes['selectedAuthor'];
 63	}
 64
 65	$query        = new WP_Query();
 66	$recent_posts = $query->query( $args );
 67
 68	if ( isset( $attributes['displayFeaturedImage'] ) && $attributes['displayFeaturedImage'] ) {
 69		update_post_thumbnail_cache( $query );
 70	}
 71
 72	$list_items_markup = '';
 73
 74	foreach ( $recent_posts as $post ) {
 75		$post_link = esc_url( get_permalink( $post ) );
 76		$title     = get_the_title( $post );
 77
 78		if ( ! $title ) {
 79			$title = __( '(no title)' );
 80		}
 81
 82		$list_items_markup .= '<li>';
 83
 84		if ( $attributes['displayFeaturedImage'] && has_post_thumbnail( $post ) ) {
 85			$image_style = '';
 86			if ( isset( $attributes['featuredImageSizeWidth'] ) ) {
 87				$image_style .= sprintf( 'max-width:%spx;', $attributes['featuredImageSizeWidth'] );
 88			}
 89			if ( isset( $attributes['featuredImageSizeHeight'] ) ) {
 90				$image_style .= sprintf( 'max-height:%spx;', $attributes['featuredImageSizeHeight'] );
 91			}
 92
 93			$image_classes = 'wp-block-latest-posts__featured-image';
 94			if ( isset( $attributes['featuredImageAlign'] ) ) {
 95				$image_classes .= ' align' . $attributes['featuredImageAlign'];
 96			}
 97
 98			$featured_image = get_the_post_thumbnail(
 99				$post,
100				$attributes['featuredImageSizeSlug'],
101				array(
102					'style' => esc_attr( $image_style ),
103				)
104			);
105			if ( $attributes['addLinkToFeaturedImage'] ) {
106				$featured_image = sprintf(
107					'<a href="%1$s" aria-label="%2$s">%3$s</a>',
108					esc_url( $post_link ),
109					esc_attr( $title ),
110					$featured_image
111				);
112			}
113			$list_items_markup .= sprintf(
114				'<div class="%1$s">%2$s</div>',
115				esc_attr( $image_classes ),
116				$featured_image
117			);
118		}
119
120		$list_items_markup .= sprintf(
121			'<a class="wp-block-latest-posts__post-title" href="%1$s">%2$s</a>',
122			esc_url( $post_link ),
123			$title
124		);
125
126		if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {
127			$author_display_name = get_the_author_meta( 'display_name', $post->post_author );
128
129			/* translators: byline. %s: author. */
130			$byline = sprintf( __( 'by %s' ), $author_display_name );
131
132			if ( ! empty( $author_display_name ) ) {
133				$list_items_markup .= sprintf(
134					'<div class="wp-block-latest-posts__post-author">%1$s</div>',
135					$byline
136				);
137			}
138		}
139
140		if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {
141			$list_items_markup .= sprintf(
142				'<time datetime="%1$s" class="wp-block-latest-posts__post-date">%2$s</time>',
143				esc_attr( get_the_date( 'c', $post ) ),
144				get_the_date( '', $post )
145			);
146		}
147
148		if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']
149			&& isset( $attributes['displayPostContentRadio'] ) && 'excerpt' === $attributes['displayPostContentRadio'] ) {
150
151			$trimmed_excerpt = get_the_excerpt( $post );
152
153			/*
154			 * Adds a "Read more" link with screen reader text.
155			 * [&hellip;] is the default excerpt ending from wp_trim_excerpt() in Core.
156			 */
157			if ( str_ends_with( $trimmed_excerpt, ' [&hellip;]' ) ) {
158				/** This filter is documented in wp-includes/formatting.php */
159				$excerpt_length = (int) apply_filters( 'excerpt_length', $block_core_latest_posts_excerpt_length );
160				if ( $excerpt_length <= $block_core_latest_posts_excerpt_length ) {
161					$trimmed_excerpt  = substr( $trimmed_excerpt, 0, -11 );
162					$trimmed_excerpt .= sprintf(
163						/* translators: 1: A URL to a post, 2: Hidden accessibility text: Post title */
164						__( '… <a class="wp-block-latest-posts__read-more" href="%1$s" rel="noopener noreferrer">Read more<span class="screen-reader-text">: %2$s</span></a>' ),
165						esc_url( $post_link ),
166						esc_html( $title )
167					);
168				}
169			}
170
171			if ( post_password_required( $post ) ) {
172				$trimmed_excerpt = __( 'This content is password protected.' );
173			}
174
175			$list_items_markup .= sprintf(
176				'<div class="wp-block-latest-posts__post-excerpt">%1$s</div>',
177				$trimmed_excerpt
178			);
179		}
180
181		if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']
182			&& isset( $attributes['displayPostContentRadio'] ) && 'full_post' === $attributes['displayPostContentRadio'] ) {
183
184			$post_content = html_entity_decode( $post->post_content, ENT_QUOTES, get_option( 'blog_charset' ) );
185
186			if ( post_password_required( $post ) ) {
187				$post_content = __( 'This content is password protected.' );
188			}
189
190			$list_items_markup .= sprintf(
191				'<div class="wp-block-latest-posts__post-full-content">%1$s</div>',
192				wp_kses_post( $post_content )
193			);
194		}
195
196		$list_items_markup .= "</li>\n";
197	}
198
199	remove_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );
200
201	$classes = array( 'wp-block-latest-posts__list' );
202	if ( isset( $attributes['postLayout'] ) && 'grid' === $attributes['postLayout'] ) {
203		$classes[] = 'is-grid';
204	}
205	if ( isset( $attributes['columns'] ) && 'grid' === $attributes['postLayout'] ) {
206		$classes[] = 'columns-' . $attributes['columns'];
207	}
208	if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {
209		$classes[] = 'has-dates';
210	}
211	if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {
212		$classes[] = 'has-author';
213	}
214	if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
215		$classes[] = 'has-link-color';
216	}
217
218	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classes ) ) );
219
220	return sprintf(
221		'<ul %1$s>%2$s</ul>',
222		$wrapper_attributes,
223		$list_items_markup
224	);
225}
226
227/**
228 * Registers the `core/latest-posts` block on server.
229 *
230 * @since 5.0.0
231 */
232function register_block_core_latest_posts() {
233	register_block_type_from_metadata(
234		__DIR__ . '/latest-posts',
235		array(
236			'render_callback' => 'render_block_core_latest_posts',
237		)
238	);
239}
240add_action( 'init', 'register_block_core_latest_posts' );
241
242/**
243 * Handles outdated versions of the `core/latest-posts` block by converting
244 * attribute `categories` from a numeric string to an array with key `id`.
245 *
246 * This is done to accommodate the changes introduced in #20781 that sought to
247 * add support for multiple categories to the block. However, given that this
248 * block is dynamic, the usual provisions for block migration are insufficient,
249 * as they only act when a block is loaded in the editor.
250 *
251 * TODO: Remove when and if the bottom client-side deprecation for this block
252 * is removed.
253 *
254 * @since 5.5.0
255 *
256 * @param array $block A single parsed block object.
257 *
258 * @return array The migrated block object.
259 */
260function block_core_latest_posts_migrate_categories( $block ) {
261	if (
262		'core/latest-posts' === $block['blockName'] &&
263		! empty( $block['attrs']['categories'] ) &&
264		is_string( $block['attrs']['categories'] )
265	) {
266		$block['attrs']['categories'] = array(
267			array( 'id' => absint( $block['attrs']['categories'] ) ),
268		);
269	}
270
271	return $block;
272}
273add_filter( 'render_block_data', 'block_core_latest_posts_migrate_categories' );
274