<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName // Needed for WP_Block_Cloner helper class.
/**
 * Server-side rendering of the `core/block` block.
 *
 * @package WordPress
 */

/**
 * Renders the `core/block` block on server.
 *
 * @since 5.0.0
 *
 * @global WP_Embed $wp_embed
 *
 * @param array $attributes The block attributes.
 *
 * @return string Rendered HTML of the referenced block.
 */
function render_block_core_block( $attributes, $content, $block_instance ) {
    static $seen_refs = array();

    if ( empty( $attributes['ref'] ) ) {
        return '';
    }

    $reusable_block = get_post( $attributes['ref'] );
    if ( ! $reusable_block || 'wp_block' !== $reusable_block->post_type ) {
        return '';
    }

    if ( isset( $seen_refs[ $attributes['ref'] ] ) ) {
        // WP_DEBUG_DISPLAY must only be honored when WP_DEBUG. This precedent
        // is set in `wp_debug_mode()`.
        $is_debug = WP_DEBUG && WP_DEBUG_DISPLAY;

        return $is_debug ?
            // translators: Visible only in the front end, this warning takes the place of a faulty block.
            __( '[block rendering halted]' ) :
            '';
    }

    if ( 'publish' !== $reusable_block->post_status || ! empty( $reusable_block->post_password ) ) {
        return '';
    }

    $seen_refs[ $attributes['ref'] ] = true;

    // Handle embeds for reusable blocks.
    global $wp_embed;
    $content = $wp_embed->run_shortcode( $reusable_block->post_content );
    $content = $wp_embed->autoembed( $content );

    // Back compat.
    // For blocks that have not been migrated in the editor, add some back compat
    // so that front-end rendering continues to work.

    // This matches the `v2` deprecation. Removes the inner `values` property
    // from every item.
    if ( isset( $attributes['content'] ) ) {
        foreach ( $attributes['content'] as &$content_data ) {
            if ( isset( $content_data['values'] ) ) {
                $is_assoc_array = is_array( $content_data['values'] ) && ! wp_is_numeric_array( $content_data['values'] );

                if ( $is_assoc_array ) {
                    $content_data = $content_data['values'];
                }
            }
        }
    }

    // This matches the `v1` deprecation. Rename `overrides` to `content`.
    if ( isset( $attributes['overrides'] ) && ! isset( $attributes['content'] ) ) {
        $attributes['content'] = $attributes['overrides'];
    }

    // Apply Block Hooks.
    $content = apply_block_hooks_to_content_from_post_object( $content, $reusable_block );

    /**
     * We attach the blocks from $content as inner blocks to the Synced Pattern block instance.
     * This ensures that block context available to the Synced Pattern block instance is provided to
     * those blocks.
     */
    $block_instance->parsed_block['innerBlocks']  = parse_blocks( $content );
    $block_instance->parsed_block['innerContent'] = array_fill( 0, count( $block_instance->parsed_block['innerBlocks'] ), null );
    if ( method_exists( $block_instance, 'refresh_context_dependents' ) ) {
        // WP_Block::refresh_context_dependents() was introduced in WordPress 6.8.
        $block_instance->refresh_context_dependents();
    } else {
        // This branch can be removed once Gutenberg requires WordPress 6.8 or later.
        if ( ! class_exists( 'WP_Block_Cloner' ) ) {
            // phpcs:ignore Gutenberg.Commenting.SinceTag.MissingClassSinceTag
            class WP_Block_Cloner extends WP_Block {
                /**
                 * Static methods of subclasses have access to protected properties
                 * of instances of the parent class.
                 * In this case, this gives us access to `available_context` and `registry`.
                 */
                // phpcs:ignore Gutenberg.Commenting.SinceTag.MissingMethodSinceTag
                public static function clone_instance( $instance ) {
                    return new WP_Block(
                        $instance->parsed_block,
                        $instance->available_context,
                        $instance->registry
                    );
                }
            }
        }
        $block_instance = WP_Block_Cloner::clone_instance( $block_instance );
    }

    $content = $block_instance->render( array( 'dynamic' => false ) );
    unset( $seen_refs[ $attributes['ref'] ] );

    return $content;
}

/**
 * Registers the `core/block` block.
 *
 * @since 5.3.0
 */
function register_block_core_block() {
    register_block_type_from_metadata(
        __DIR__ . '/block',
        array(
            'render_callback' => 'render_block_core_block',
        )
    );
}
add_action( 'init', 'register_block_core_block' );