<?php

/**
 * Renders the `gtm/template-summary` 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 template summary.
 */
function gtm_render_block_template_summary( $attr, $content, $block ) {

	if ( ! isset( $block->context['gtmTemplateSummary'] ) ) {
		return '';
	}

	$template_summary = $block->context['gtmTemplateSummary'];

	$inner_html = sprintf( '<span class="wp-block-gtm-template-summary__summary">%s</span>', esc_html( $template_summary ) );

	$wrapper_attributes = get_block_wrapper_attributes( ['class' => ''] );

	return sprintf(
		'<div %1$s>%2$s</div>',
		$wrapper_attributes,
		$inner_html
	);
}

/**
 * Registers the `gtm/template-summary` block on the server.
 */
function gtm_register_block_template_summary() {
	gtm_register_block_type( 'template-summary', [
		'render_callback' => 'gtm_render_block_template_summary',
	] );
}

add_action( 'init', 'gtm_register_block_template_summary', 20 );