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<?php
/**
* WPSEO plugin file.
*
* @package Yoast\WP\SEO\Generators\Schema
*/
namespace Yoast\WP\SEO\Generators\Schema;
/**
* Returns schema FAQ data.
*/
class HowTo extends Abstract_Schema_Piece {
/**
* Determines whether or not a piece should be added to the graph.
*
* @return bool
*/
public function is_needed() {
return ! empty( $this->context->blocks['yoast/how-to-block'] );
}
/**
* Renders a list of questions, referencing them by ID.
*
* @return array $data Our Schema graph.
*/
public function generate() {
$graph = [];
foreach ( $this->context->blocks['yoast/how-to-block'] as $index => $block ) {
$this->add_how_to( $graph, $block, $index );
}
return $graph;
}
/**
* Adds the duration of the task to the Schema.
*
* @param array $data Our How-To schema data.
* @param array $attributes The block data attributes.
*/
private function add_duration( &$data, $attributes ) {
if ( empty( $attributes['hasDuration'] ) ) {
return;
}
$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 ) {
$data['totalTime'] = \esc_attr( 'P' . $days . 'DT' . $hours . 'H' . $minutes . 'M' );
}
}
/**
* Adds the steps to our How-To output.
*
* @param array $data Our How-To schema data.
* @param array $steps Our How-To block's steps.
*/
private function add_steps( &$data, $steps ) {
foreach ( $steps as $step ) {
$schema_id = $this->context->canonical . '#' . \esc_attr( $step['id'] );
$schema_step = [
'@type' => 'HowToStep',
'url' => $schema_id,
];
if ( isset( $step['jsonText'] ) ) {
$json_text = $this->helpers->schema->html->sanitize( $step['jsonText'] );
}
if ( isset( $step['jsonName'] ) ) {
$json_name = $this->helpers->schema->html->smart_strip_tags( $step['jsonName'] );
}
if ( empty( $json_name ) ) {
if ( empty( $step['text'] ) ) {
continue;
}
$schema_step['text'] = '';
$this->add_step_image( $schema_step, $step );
// If there is no text and no image, don't output the step.
if ( empty( $json_text ) && empty( $schema_step['image'] ) ) {
continue;
}
if ( ! empty( $json_text ) ) {
$schema_step['text'] = $json_text;
}
}
elseif ( empty( $json_text ) ) {
$schema_step['text'] = $json_name;
}
else {
$schema_step['name'] = $json_name;
$this->add_step_description( $schema_step, $json_text );
$this->add_step_image( $schema_step, $step );
}
$data['step'][] = $schema_step;
}
}
/**
* Checks if we have a step description, if we do, add it.
*
* @param array $schema_step Our Schema output for the Step.
* @param string $json_text The step text.
*/
private function add_step_description( &$schema_step, $json_text ) {
$schema_step['itemListElement'] = [
[
'@type' => 'HowToDirection',
'text' => $json_text,
],
];
}
/**
* Checks if we have a step image, if we do, add it.
*
* @param array $schema_step Our Schema output for the Step.
* @param array $step The step block data.
*/
private function add_step_image( &$schema_step, $step ) {
foreach ( $step['text'] as $line ) {
if ( \is_array( $line ) && isset( $line['type'] ) && $line['type'] === 'img' ) {
$schema_step['image'] = $this->get_image_schema( \esc_url( $line['props']['src'] ) );
}
}
}
/**
* Generates the HowTo schema for a block.
*
* @param array $graph Our Schema data.
* @param array $block The How-To block content.
* @param int $index The index of the current block.
*/
protected function add_how_to( &$graph, $block, $index ) {
$data = [
'@type' => 'HowTo',
'@id' => $this->context->canonical . '#howto-' . ( $index + 1 ),
'name' => $this->helpers->schema->html->smart_strip_tags( $this->helpers->post->get_post_title_with_fallback( $this->context->id ) ),
'mainEntityOfPage' => [ '@id' => $this->context->main_schema_id ],
'description' => '',
];
if ( isset( $block['attrs']['jsonDescription'] ) ) {
$data['description'] = $this->helpers->schema->html->sanitize( $block['attrs']['jsonDescription'] );
}
$this->add_duration( $data, $block['attrs'] );
$this->add_steps( $data, $block['attrs']['steps'] );
$data = $this->helpers->schema->language->add_piece_language( $data );
$graph[] = $data;
}
/**
* Generates the image schema from the attachment $url.
*
* @param string $url Attachment url.
*
* @return array Image schema.
*/
protected function get_image_schema( $url ) {
$schema_id = $this->context->canonical . '#schema-image-' . \md5( $url );
return $this->helpers->schema->image->generate_from_url( $schema_id, $url );
}
}