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 ); return '' . $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 ) { $json_ld = array( '@context' => 'https://schema.org', '@type' => 'HowTo', ); $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; } }