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<?php namespace Yoast\WP\SEO\Generators\Schema; use Yoast\WP\SEO\Config\Schema_IDs; /** * Returns schema HowTo 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 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 $attributes The block data attributes. * * @return void */ private function add_duration( &$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 $steps Our How-To block's steps. * * @return void */ private function add_steps( &$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 $json_text The step text. * * @return void */ private function add_step_description( &$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 $step The step block data. * * @return void */ private function add_step_image( &$schema_step, $step ) { if ( isset( $step['text'] ) && \is_array( $step['text'] ) ) { 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 $index The index of the current block. * * @return void */ protected function add_how_to( &$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 ( $this->context->has_article ) { $data['mainEntityOfPage'] = [ '@id' => $this->context->main_schema_id . Schema_IDs::ARTICLE_HASH ]; } if ( isset( $block['attrs']['jsonDescription'] ) ) { $data['description'] = $this->helpers->schema->html->sanitize( $block['attrs']['jsonDescription'] ); } $this->add_duration( $data, $block['attrs'] ); if ( isset( $block['attrs']['steps'] ) ) { $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 ); } }
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