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| 1 | <?php |
| 2 | /** |
| 3 | * Per-post Schema.org node builder. |
| 4 | * |
| 5 | * Builds the page-level JSON-LD node for the queried singular post: Article (the |
| 6 | * default for standard posts) and FAQPage (when the post uses `core/details` |
| 7 | * blocks). The type follows the per-post `jetpack_seo_schema_type` override when |
| 8 | * set, otherwise a sensible default by post type. Returns an array node or null |
| 9 | * when the post should not emit structured data, so the graph can skip it. |
| 10 | * |
| 11 | * @package automattic/jetpack-seo-package |
| 12 | */ |
| 13 | |
| 14 | namespace Automattic\Jetpack\SEO; |
| 15 | |
| 16 | use Jetpack_SEO_Posts; |
| 17 | use WP_Post; |
| 18 | |
| 19 | /** |
| 20 | * Builds the Article / FAQPage node for a single post. |
| 21 | */ |
| 22 | class Post_Schema_Node { |
| 23 | |
| 24 | /** |
| 25 | * Max words kept for a schema `description`, so a long post body doesn't |
| 26 | * dump its full content into the markup. |
| 27 | */ |
| 28 | const DESCRIPTION_MAX_WORDS = 55; |
| 29 | |
| 30 | /** |
| 31 | * Build the JSON-LD node for the queried post, or null when none applies. |
| 32 | * |
| 33 | * @param WP_Post|null $post The queried post. |
| 34 | * @return array|null |
| 35 | */ |
| 36 | public static function build( $post ) { |
| 37 | if ( ! ( $post instanceof WP_Post ) ) { |
| 38 | return null; |
| 39 | } |
| 40 | |
| 41 | // Only emit structured data for published content. Previews, drafts, and |
| 42 | // private posts are viewable by logged-in users (and may be edge-cached), |
| 43 | // so we must not output JSON-LD for anything that isn't publicly published. |
| 44 | if ( 'publish' !== $post->post_status ) { |
| 45 | return null; |
| 46 | } |
| 47 | |
| 48 | // @phan-suppress-next-line PhanUndeclaredClassMethod -- Jetpack_SEO_Posts lives in plugins/jetpack; Schema_Builder::emit() guards on class_exists. |
| 49 | $override = Jetpack_SEO_Posts::get_post_schema_type( $post ); |
| 50 | $type = '' !== $override ? $override : self::default_schema_for_post( $post ); |
| 51 | |
| 52 | switch ( $type ) { |
| 53 | case 'faq': |
| 54 | return self::build_faq( $post ); |
| 55 | case 'article': |
| 56 | return self::build_article( $post ); |
| 57 | default: |
| 58 | return null; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | * Default Schema type for a post when the user has not set an override: |
| 64 | * Article for standard posts, none for pages, attachments, or custom types. |
| 65 | * |
| 66 | * @param WP_Post $post The post. |
| 67 | * @return string |
| 68 | */ |
| 69 | private static function default_schema_for_post( WP_Post $post ) { |
| 70 | // Only standard posts get Article schema by default; everything else |
| 71 | // (pages, attachments, custom post types) requires an explicit override. |
| 72 | return 'post' === $post->post_type ? 'article' : ''; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * Article JSON-LD. |
| 77 | * |
| 78 | * @param WP_Post $post The post. |
| 79 | * @return array |
| 80 | */ |
| 81 | private static function build_article( WP_Post $post ) { |
| 82 | $node = array( |
| 83 | '@type' => 'Article', |
| 84 | 'headline' => wp_strip_all_tags( get_the_title( $post ) ), |
| 85 | 'datePublished' => get_post_time( 'c', true, $post ), |
| 86 | 'dateModified' => get_post_modified_time( 'c', true, $post ), |
| 87 | 'mainEntityOfPage' => array( |
| 88 | '@type' => 'WebPage', |
| 89 | '@id' => get_permalink( $post ), |
| 90 | ), |
| 91 | 'author' => array( |
| 92 | '@type' => 'Person', |
| 93 | 'name' => get_the_author_meta( 'display_name', (int) $post->post_author ), |
| 94 | ), |
| 95 | ); |
| 96 | |
| 97 | $image = get_the_post_thumbnail_url( $post, 'full' ); |
| 98 | if ( $image ) { |
| 99 | $node['image'] = $image; |
| 100 | } |
| 101 | |
| 102 | // @phan-suppress-next-line PhanUndeclaredClassMethod -- Jetpack_SEO_Posts lives in plugins/jetpack; Schema_Builder::emit() guards on class_exists. |
| 103 | $description = Jetpack_SEO_Posts::get_post_description( $post ); |
| 104 | if ( $description ) { |
| 105 | // Cap it: get_post_description() falls back to full post_content, which |
| 106 | // would otherwise dump the whole body into the markup. |
| 107 | $node['description'] = wp_trim_words( wp_strip_all_tags( $description ), self::DESCRIPTION_MAX_WORDS, '' ); |
| 108 | } |
| 109 | |
| 110 | return $node; |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * FAQPage JSON-LD, parsed from `core/details` blocks (summary = question, |
| 115 | * rendered content = answer). Returns null when the post has none, so we |
| 116 | * never emit an empty/invalid FAQPage. |
| 117 | * |
| 118 | * @param WP_Post $post The post. |
| 119 | * @return array|null |
| 120 | */ |
| 121 | private static function build_faq( WP_Post $post ) { |
| 122 | if ( ! function_exists( 'parse_blocks' ) ) { |
| 123 | return null; |
| 124 | } |
| 125 | |
| 126 | $items = array(); |
| 127 | foreach ( parse_blocks( $post->post_content ) as $block ) { |
| 128 | if ( 'core/details' !== ( $block['blockName'] ?? '' ) ) { |
| 129 | continue; |
| 130 | } |
| 131 | $question = self::question_from_details_block( $block ); |
| 132 | |
| 133 | // Render only the inner blocks for the answer. Rendering the whole |
| 134 | // core/details block would re-include the <summary> (the question). |
| 135 | $answer_html = ''; |
| 136 | foreach ( $block['innerBlocks'] ?? array() as $inner_block ) { |
| 137 | $answer_html .= render_block( $inner_block ); |
| 138 | } |
| 139 | $answer = self::to_plain_text( $answer_html ); |
| 140 | if ( '' === $question || '' === $answer ) { |
| 141 | continue; |
| 142 | } |
| 143 | $items[] = array( |
| 144 | '@type' => 'Question', |
| 145 | 'name' => $question, |
| 146 | 'acceptedAnswer' => array( |
| 147 | '@type' => 'Answer', |
| 148 | 'text' => $answer, |
| 149 | ), |
| 150 | ); |
| 151 | } |
| 152 | |
| 153 | if ( empty( $items ) ) { |
| 154 | return null; |
| 155 | } |
| 156 | |
| 157 | return array( |
| 158 | '@type' => 'FAQPage', |
| 159 | 'mainEntity' => $items, |
| 160 | ); |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Extract the question text from a `core/details` block's `<summary>`. |
| 165 | * |
| 166 | * The Details block declares `summary` as a `source: "rich-text"` attribute, |
| 167 | * so the value is saved in the `<summary>…</summary>` markup, not in the |
| 168 | * `<!-- wp:details … -->` comment. `parse_blocks()` does not resolve |
| 169 | * source-based attributes (it only returns what's written into the comment), |
| 170 | * so `$block['attrs']['summary']` is always empty for real, editor-saved |
| 171 | * blocks. The summary text does survive in the block's inner HTML, so we read |
| 172 | * it from there instead. |
| 173 | * |
| 174 | * @param array $block A parsed `core/details` block. |
| 175 | * @return string The plain-text question, or '' when the block has no summary. |
| 176 | */ |
| 177 | private static function question_from_details_block( array $block ) { |
| 178 | $inner_html = (string) ( $block['innerHTML'] ?? '' ); |
| 179 | if ( ! preg_match( '#<summary\b[^>]*>(.*?)</summary>#is', $inner_html, $matches ) ) { |
| 180 | return ''; |
| 181 | } |
| 182 | return self::to_plain_text( $matches[1] ); |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * Reduce a fragment of post HTML to the plain text used for a schema value: |
| 187 | * tags stripped, entities decoded, surrounding whitespace trimmed. |
| 188 | * |
| 189 | * @param string $html HTML fragment. |
| 190 | * @return string |
| 191 | */ |
| 192 | private static function to_plain_text( $html ) { |
| 193 | return trim( html_entity_decode( wp_strip_all_tags( (string) $html ), ENT_QUOTES, 'UTF-8' ) ); |
| 194 | } |
| 195 | } |