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✏️ Editing: class-how-to-block.php

<?php
/**
 * WPSEO plugin file.
 *
 * @package WPSEO\Structured_Data_Blocks
 */

/**
 * Class WPSEO_How_To_Block.
 */
class WPSEO_How_To_Block implements WPSEO_WordPress_Integration {

/**
	 * Registers the how-to block as a server-side rendered block.
	 *
	 * @return void
	 */
	public function register_hooks() {
		if ( ! function_exists( 'register_block_type' ) ) {
			return;
		}

register_block_type(
			'yoast/how-to-block',
			array( 'render_callback' => array( $this, 'render' ) )
		);
	}

/**
	 * Renders the block.
	 *
	 * Because we can't save script tags in Gutenberg without sufficient user permissions,
	 * we render these server-side.
	 *
	 * @param array  $attributes The attributes of the block.
	 * @param string $content    The HTML content of the block.
	 *
	 * @return string The block preceded by its JSON-LD script.
	 */
	public function render( $attributes, $content ) {
		if ( ! is_array( $attributes ) || ! is_singular() ) {
			return $content;
		}

$json_ld = $this->get_json_ld( $attributes );

$schema = array(
			'@context' => 'https://schema.org',
			'@graph'   => array( $json_ld ),
		);

return WPSEO_Utils::schema_tag( $schema ) . $content;
	}

/**
	 * Returns the JSON-LD for a how-to block.
	 *
	 * @param array $attributes The attributes of the how-to block.
	 *
	 * @return array The JSON-LD representation of the how-to block.
	 */
	protected function get_json_ld( array $attributes ) {
		$hash = WPSEO_Schema_IDs::WEBPAGE_HASH;
		if ( WPSEO_Schema_Article::is_article_post_type() ) {
			$hash = WPSEO_Schema_IDs::ARTICLE_HASH;
		}

$json_ld = array(
			'@type'            => 'HowTo',
			'mainEntityOfPage' => array( '@id' => WPSEO_Frontend::get_instance()->canonical( false ) . $hash ),
		);

$post_title = get_the_title();
		if ( ! empty( $post_title ) ) {
			$json_ld['name'] = $post_title;
		}

if ( ! empty( $attributes['hasDuration'] ) && $attributes['hasDuration'] === true ) {
			$days    = empty( $attributes['days'] ) ? 0 : $attributes['days'];
			$hours   = empty( $attributes['hours'] ) ? 0 : $attributes['hours'];
			$minutes = empty( $attributes['minutes'] ) ? 0 : $attributes['minutes'];

if ( ( $days + $hours + $minutes ) > 0 ) {
				$json_ld['totalTime'] = 'P' . $days . 'DT' . $hours . 'H' . $minutes . 'M';
			}
		}

if ( ! empty( $attributes['jsonDescription'] ) ) {
			$json_ld['description'] = $attributes['jsonDescription'];
		}

if ( ! empty( $attributes['steps'] ) && is_array( $attributes['steps'] ) ) {
			$json_ld['step'] = array();
			$steps           = array_filter( $attributes['steps'], 'is_array' );
			foreach ( $steps as $step ) {
				$json_ld['step'][] = $this->get_section_json_ld( $step );
			}
		}

return $json_ld;
	}

/**
	 * Returns the JSON-LD for a step-section in a how-to block.
	 *
	 * @param array $step The attributes of a step-section in the how-to block.
	 *
	 * @return array The JSON-LD representation of the step-section in a how-to block.
	 */
	protected function get_section_json_ld( array $step ) {
		$section_json_ld = array(
			'@type'           => 'HowToSection',
			'itemListElement' => $this->get_step_json_ld( $step ),
		);

if ( ! empty( $step['jsonName'] ) ) {
			$section_json_ld['name'] = $step['jsonName'];
		}

if ( ! empty( $step['jsonImageSrc'] ) ) {
			$section_json_ld['image'] = array(
				'@type'      => 'ImageObject',
				'contentUrl' => $step['jsonImageSrc'],
			);
		}

return $section_json_ld;
	}

/**
	 * Returns the JSON-LD for a step's description in a how-to block.
	 *
	 * @param array $step The attributes of a step(-section) in the how-to block.
	 *
	 * @return array The JSON-LD representation of the step's description in a how-to block.
	 */
	protected function get_step_json_ld( array $step ) {
		$step_json_ld = array(
			'@type' => 'HowToStep',
		);

if ( ! empty( $step['jsonText'] ) ) {
			$step_json_ld['text'] = $step['jsonText'];
		}

return $step_json_ld;
	}
}

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