<?php

/**

 * Server-side rendering of the `core/latest-posts` block.

 *

 * @package WordPress

 */

/**

 * The excerpt length set by the Latest Posts core block

 * set at render time and used by the block itself.

 *

 * @var int

 */

$block_core_latest_posts_excerpt_length = 0;

/**

 * Callback for the excerpt_length filter used by

 * the Latest Posts block at render time.

 *

 * @return int Returns the global $block_core_latest_posts_excerpt_length variable

 *             to allow the excerpt_length filter respect the Latest Block setting.

 */

function block_core_latest_posts_get_excerpt_length() {

	global $block_core_latest_posts_excerpt_length;

	return $block_core_latest_posts_excerpt_length;

}

/**

 * Renders the `core/latest-posts` block on server.

 *

 * @param array $attributes The block attributes.

 *

 * @return string Returns the post content with latest posts added.

 */

function render_block_core_latest_posts( $attributes ) {

	global $post, $block_core_latest_posts_excerpt_length;

	$args = array(

		'posts_per_page'   => $attributes['postsToShow'],

		'post_status'      => 'publish',

		'order'            => $attributes['order'],

		'orderby'          => $attributes['orderBy'],

		'suppress_filters' => false,

	);

	$block_core_latest_posts_excerpt_length = $attributes['excerptLength'];

	add_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );

	if ( isset( $attributes['categories'] ) ) {

		$args['category__in'] = array_column( $attributes['categories'], 'id' );

	}

	if ( isset( $attributes['selectedAuthor'] ) ) {

		$args['author'] = $attributes['selectedAuthor'];

	}

	$recent_posts = get_posts( $args );

	$list_items_markup = '';

	foreach ( $recent_posts as $post ) {

		$list_items_markup .= '<li>';

		if ( $attributes['displayFeaturedImage'] && has_post_thumbnail( $post ) ) {

			$image_style = '';

			if ( isset( $attributes['featuredImageSizeWidth'] ) ) {

				$image_style .= sprintf( 'max-width:%spx;', $attributes['featuredImageSizeWidth'] );

			}

			if ( isset( $attributes['featuredImageSizeHeight'] ) ) {

				$image_style .= sprintf( 'max-height:%spx;', $attributes['featuredImageSizeHeight'] );

			}

			$image_classes = 'wp-block-latest-posts__featured-image';

			if ( isset( $attributes['featuredImageAlign'] ) ) {

				$image_classes .= ' align' . $attributes['featuredImageAlign'];

			}

			$list_items_markup .= sprintf(

				'<div class="%1$s">%2$s</div>',

				$image_classes,

			);

		}

		$title = get_the_title( $post );

		if ( ! $title ) {

			$title = __( '(no title)' );

		}

		$list_items_markup .= sprintf(

			'<a href="%1$s">%2$s</a>',

			$title

		);

		if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {

			$author_display_name = get_the_author_meta( 'display_name', $post->post_author );

			/* translators: byline. %s: current author. */

			$byline = sprintf( __( 'by %s' ), $author_display_name );

			if ( ! empty( $author_display_name ) ) {

				$list_items_markup .= sprintf(

					'<div class="wp-block-latest-posts__post-author">%1$s</div>',

					esc_html( $byline )

				);

			}

		}

		if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {

			$list_items_markup .= sprintf(

				'<time datetime="%1$s" class="wp-block-latest-posts__post-date">%2$s</time>',

				esc_attr( get_the_date( 'c', $post ) ),

				esc_html( get_the_date( '', $post ) )

			);

		}

		if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']

			&& isset( $attributes['displayPostContentRadio'] ) && 'excerpt' === $attributes['displayPostContentRadio'] ) {

			$trimmed_excerpt = get_the_excerpt( $post );

			$list_items_markup .= sprintf(

				'<div class="wp-block-latest-posts__post-excerpt">%1$s</div>',

				$trimmed_excerpt

			);

		}

		if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']

			&& isset( $attributes['displayPostContentRadio'] ) && 'full_post' === $attributes['displayPostContentRadio'] ) {

			$list_items_markup .= sprintf(

				'<div class="wp-block-latest-posts__post-full-content">%1$s</div>',

			);

		}

		$list_items_markup .= "</li>\n";

	}

	remove_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );

	if ( isset( $attributes['postLayout'] ) && 'grid' === $attributes['postLayout'] ) {

		$class .= ' is-grid';

	}

	if ( isset( $attributes['columns'] ) && 'grid' === $attributes['postLayout'] ) {

		$class .= ' columns-' . $attributes['columns'];

	}

	if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {

		$class .= ' has-dates';

	}

	if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {

		$class .= ' has-author';

	}

	return sprintf(

		$list_items_markup

	);

}

/**

 * Registers the `core/latest-posts` block on server.

 */

function register_block_core_latest_posts() {

	register_block_type_from_metadata(

		__DIR__ . '/latest-posts',

		array(

			'render_callback' => 'render_block_core_latest_posts',

		)

	);

}

add_action( 'init', 'register_block_core_latest_posts' );

/**

 * Handles outdated versions of the `core/latest-posts` block by converting

 * attribute `categories` from a numeric string to an array with key `id`.

 *

 * This is done to accommodate the changes introduced in #20781 that sought to

 * add support for multiple categories to the block. However, given that this

 * block is dynamic, the usual provisions for block migration are insufficient,

 * as they only act when a block is loaded in the editor.

 *

 * TODO: Remove when and if the bottom client-side deprecation for this block

 * is removed.

 *

 * @param array $block A single parsed block object.

 *

 * @return array The migrated block object.

 */

function block_core_latest_posts_migrate_categories( $block ) {

	if (

		'core/latest-posts' === $block['blockName'] &&

		! empty( $block['attrs']['categories'] ) &&

		is_string( $block['attrs']['categories'] )

	) {

		$block['attrs']['categories'] = array(

			array( 'id' => absint( $block['attrs']['categories'] ) ),

		);

	}

	return $block;

}

add_filter( 'render_block_data', 'block_core_latest_posts_migrate_categories' );