<?php

/**

 * Server-side rendering of the `core/post-template` block.

 *

 * @package WordPress

 */

/**

 * Renders the `core/post-template` block on the server.

 *

 * @param array    $attributes Block attributes.

 * @param string   $content    Block default content.

 * @param WP_Block $block      Block instance.

 *

 * @return string Returns the output of the query, structured using the layout defined by the block's inner blocks.

 */

function render_block_core_post_template( $attributes, $content, $block ) {

	$page_key = isset( $block->context['queryId'] ) ? 'query-' . $block->context['queryId'] . '-page' : 'query-page';

	$page     = empty( $_GET[ $page_key ] ) ? 1 : (int) $_GET[ $page_key ];

	$query_args = build_query_vars_from_query_block( $block, $page );

	// Override the custom query with the global query if needed.

	$use_global_query = ( isset( $block->context['query']['inherit'] ) && $block->context['query']['inherit'] );

	if ( $use_global_query ) {

		global $wp_query;

		if ( $wp_query && isset( $wp_query->query_vars ) && is_array( $wp_query->query_vars ) ) {

			// Unset `offset` because if is set, $wp_query overrides/ignores the paged parameter and breaks pagination.

			unset( $query_args['offset'] );

			$query_args = wp_parse_args( $wp_query->query_vars, $query_args );

			if ( empty( $query_args['post_type'] ) && is_singular() ) {

				$query_args['post_type'] = get_post_type( get_the_ID() );

			}

		}

	}

	$query = new WP_Query( $query_args );

	if ( ! $query->have_posts() ) {

		return '';

	}

	$classnames = '';

	if ( isset( $block->context['displayLayout'] ) && isset( $block->context['query'] ) ) {

		if ( isset( $block->context['displayLayout']['type'] ) && 'flex' === $block->context['displayLayout']['type'] ) {

			$classnames = "is-flex-container columns-{$block->context['displayLayout']['columns']}";

		}

	}

	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $classnames ) );

	$content = '';

	while ( $query->have_posts() ) {

		$query->the_post();

		$block_content = (

			new WP_Block(

				$block->parsed_block,

				array(

					'postType' => get_post_type(),

					'postId'   => get_the_ID(),

				)

			)

		)->render( array( 'dynamic' => false ) );

		$content      .= "<li>{$block_content}</li>";

	}

	wp_reset_postdata();

	return sprintf(

		'<ul %1$s>%2$s</ul>',

		$wrapper_attributes,

		$content

	);

}

/**

 * Registers the `core/post-template` block on the server.

 */

function register_block_core_post_template() {

	register_block_type_from_metadata(

		__DIR__ . '/post-template',

		array(

			'render_callback'   => 'render_block_core_post_template',

			'skip_inner_blocks' => true,

		)

	);

}

add_action( 'init', 'register_block_core_post_template' );