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| 1 | <?php |
| 2 | /** |
| 3 | * Adds meta tags to pages that need it. |
| 4 | * |
| 5 | * @package automattic/jetpack-social-plugin |
| 6 | */ |
| 7 | |
| 8 | namespace Automattic\Jetpack\Social; |
| 9 | |
| 10 | use WP_Post; |
| 11 | |
| 12 | /** |
| 13 | * Adds the meta tags. |
| 14 | */ |
| 15 | class Meta_Tags { |
| 16 | /** |
| 17 | * This list is copied verbatim from class.jetpack.php |
| 18 | * |
| 19 | * Note: All in One SEO Pack, All in one SEO Pack Pro, WordPress SEO by Yoast, and WordPress SEO Premium by Yoast automatically deactivate |
| 20 | * Jetpack's Open Graph tags via filter when their Social Meta modules are active. |
| 21 | * |
| 22 | * @var array Array of plugin slugs. |
| 23 | */ |
| 24 | private $open_graph_conflicting_plugins = array( |
| 25 | 'jetpack/jetpack.php', // The Jetpack plugin adds its own meta tags. |
| 26 | 'jetpack-dev/jetpack.php', // Jetpack's location with the beta plugin. |
| 27 | '2-click-socialmedia-buttons/2-click-socialmedia-buttons.php', // 2 Click Social Media Buttons. |
| 28 | 'add-link-to-facebook/add-link-to-facebook.php', // Add Link to Facebook. |
| 29 | 'add-meta-tags/add-meta-tags.php', // Add Meta Tags. |
| 30 | 'complete-open-graph/complete-open-graph.php', // Complete Open Graph. |
| 31 | 'easy-facebook-share-thumbnails/esft.php', // Easy Facebook Share Thumbnail. |
| 32 | 'heateor-open-graph-meta-tags/heateor-open-graph-meta-tags.php', // Open Graph Meta Tags by Heateor. |
| 33 | 'facebook/facebook.php', // Facebook (official plugin). |
| 34 | 'facebook-awd/AWD_facebook.php', // Facebook AWD All in one. |
| 35 | 'facebook-featured-image-and-open-graph-meta-tags/fb-featured-image.php', // Facebook Featured Image & OG Meta Tags. |
| 36 | 'facebook-meta-tags/facebook-metatags.php', // Facebook Meta Tags. |
| 37 | 'wonderm00ns-simple-facebook-open-graph-tags/wonderm00n-open-graph.php', // Facebook Open Graph Meta Tags for WordPress. |
| 38 | 'facebook-revised-open-graph-meta-tag/index.php', // Facebook Revised Open Graph Meta Tag. |
| 39 | 'facebook-thumb-fixer/_facebook-thumb-fixer.php', // Facebook Thumb Fixer. |
| 40 | 'facebook-and-digg-thumbnail-generator/facebook-and-digg-thumbnail-generator.php', // Fedmich's Facebook Open Graph Meta. |
| 41 | 'network-publisher/networkpub.php', // Network Publisher. |
| 42 | 'nextgen-facebook/nextgen-facebook.php', // NextGEN Facebook OG. |
| 43 | 'social-networks-auto-poster-facebook-twitter-g/NextScripts_SNAP.php', // NextScripts SNAP. |
| 44 | 'og-tags/og-tags.php', // OG Tags. |
| 45 | 'opengraph/opengraph.php', // Open Graph. |
| 46 | 'open-graph-protocol-framework/open-graph-protocol-framework.php', // Open Graph Protocol Framework. |
| 47 | 'seo-facebook-comments/seofacebook.php', // SEO Facebook Comments. |
| 48 | 'seo-ultimate/seo-ultimate.php', // SEO Ultimate. |
| 49 | 'sexybookmarks/sexy-bookmarks.php', // Shareaholic. |
| 50 | 'shareaholic/sexy-bookmarks.php', // Shareaholic. |
| 51 | 'sharepress/sharepress.php', // SharePress. |
| 52 | 'simple-facebook-connect/sfc.php', // Simple Facebook Connect. |
| 53 | 'social-discussions/social-discussions.php', // Social Discussions. |
| 54 | 'social-sharing-toolkit/social_sharing_toolkit.php', // Social Sharing Toolkit. |
| 55 | 'socialize/socialize.php', // Socialize. |
| 56 | 'squirrly-seo/squirrly.php', // SEO by SQUIRRLYâ„¢. |
| 57 | 'only-tweet-like-share-and-google-1/tweet-like-plusone.php', // Tweet, Like, Google +1 and Share. |
| 58 | 'wordbooker/wordbooker.php', // Wordbooker. |
| 59 | 'wpsso/wpsso.php', // WordPress Social Sharing Optimization. |
| 60 | 'wp-caregiver/wp-caregiver.php', // WP Caregiver. |
| 61 | 'wp-facebook-like-send-open-graph-meta/wp-facebook-like-send-open-graph-meta.php', // WP Facebook Like Send & Open Graph Meta. |
| 62 | 'wp-facebook-open-graph-protocol/wp-facebook-ogp.php', // WP Facebook Open Graph protocol. |
| 63 | 'wp-ogp/wp-ogp.php', // WP-OGP. |
| 64 | 'wp-seopress/seopress.php', // SEOPress. |
| 65 | 'wp-seopress-pro/seopress-pro.php', // SEOPress Pro. |
| 66 | 'zoltonorg-social-plugin/zosp.php', // Zolton.org Social Plugin. |
| 67 | 'wp-fb-share-like-button/wp_fb_share-like_widget.php', // WP Facebook Like Button. |
| 68 | 'open-graph-metabox/open-graph-metabox.php', // Open Graph Metabox. |
| 69 | 'seo-by-rank-math/rank-math.php', // Rank Math. |
| 70 | 'slim-seo/slim-seo.php', // Slim SEO. |
| 71 | ); |
| 72 | |
| 73 | /** |
| 74 | * This list is copied verbatim from class.jetpack.php |
| 75 | * |
| 76 | * @var array Plugins that conflict with Twitter cards. |
| 77 | */ |
| 78 | private $twitter_cards_conflicting_plugins = array( |
| 79 | 'eewee-twitter-card/index.php', // Eewee Twitter Card. |
| 80 | 'ig-twitter-cards/ig-twitter-cards.php', // IG:Twitter Cards. |
| 81 | 'jm-twitter-cards/jm-twitter-cards.php', // JM Twitter Cards. |
| 82 | 'kevinjohn-gallagher-pure-web-brilliants-social-graph-twitter-cards-extention/kevinjohn_gallagher___social_graph_twitter_output.php', // Pure Web Brilliant's Social Graph Twitter Cards Extension. |
| 83 | 'twitter-cards/twitter-cards.php', // Twitter Cards. |
| 84 | 'twitter-cards-meta/twitter-cards-meta.php', // Twitter Cards Meta. |
| 85 | 'wp-to-twitter/wp-to-twitter.php', // WP to Twitter. |
| 86 | 'wp-twitter-cards/twitter_cards.php', // WP Twitter Cards. |
| 87 | 'seo-by-rank-math/rank-math.php', // Rank Math. |
| 88 | 'slim-seo/slim-seo.php', // Slim SEO. |
| 89 | ); |
| 90 | |
| 91 | /** |
| 92 | * Get a list of all active plugins. |
| 93 | * |
| 94 | * @return array Array of active plugins. |
| 95 | */ |
| 96 | public function get_active_plugins() { |
| 97 | $active_plugins = (array) get_option( 'active_plugins', array() ); |
| 98 | |
| 99 | if ( is_multisite() ) { |
| 100 | // Due to legacy code, active_sitewide_plugins stores them in the keys, |
| 101 | // whereas active_plugins stores them in the values. |
| 102 | $active_plugins = array_merge( |
| 103 | $active_plugins, |
| 104 | array_keys( get_site_option( 'active_sitewide_plugins', array() ) ) |
| 105 | ); |
| 106 | } |
| 107 | |
| 108 | return array_unique( $active_plugins ); |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Check if meta tags should be rendered. |
| 113 | * |
| 114 | * @return bool True if meta tags should be rendered. |
| 115 | */ |
| 116 | public function should_render_meta_tags() { |
| 117 | if ( ! empty( array_intersect( $this->get_active_plugins(), $this->open_graph_conflicting_plugins ) ) ) { |
| 118 | return false; |
| 119 | } |
| 120 | |
| 121 | /** This filter is documented in projects/plugins/jetpack/functions.opengraph.php */ |
| 122 | return apply_filters( 'jetpack_enable_open_graph', is_singular() ); |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * Check if Twitter Cards tags should be rendered. |
| 127 | * |
| 128 | * @return bool True if Twitter Cards tags should be rendered. |
| 129 | */ |
| 130 | public function should_render_twitter_cards_tags() { |
| 131 | return empty( array_intersect( $this->get_active_plugins(), $this->twitter_cards_conflicting_plugins ) ); |
| 132 | } |
| 133 | |
| 134 | /** |
| 135 | * Get the featured image for a post. |
| 136 | * |
| 137 | * @param int $post_id The post ID. Optional. Defaults to global $post. |
| 138 | * @param int $width The minimum width of the image. Optional. Defaults to 200. |
| 139 | * @param int $height The minimum height of the image. Optional. Defaults to 200. |
| 140 | * @return array The featured image and dimensions. Empty array if no image is found. |
| 141 | */ |
| 142 | public function get_featured_image( $post_id = null, $width = 200, $height = 200 ) { |
| 143 | $post = get_post( $post_id ); |
| 144 | |
| 145 | if ( |
| 146 | empty( $post ) || |
| 147 | ! has_post_thumbnail( $post ) || |
| 148 | post_password_required( $post_id ) |
| 149 | ) { |
| 150 | return array(); |
| 151 | } |
| 152 | |
| 153 | $thumb = get_post_thumbnail_id( $post ); |
| 154 | $meta = wp_get_attachment_metadata( $thumb ); |
| 155 | |
| 156 | // Must be larger than requested minimums. |
| 157 | if ( ! isset( $meta['width'] ) || $meta['width'] < $width ) { |
| 158 | return array(); |
| 159 | } |
| 160 | |
| 161 | if ( ! isset( $meta['height'] ) || $meta['height'] < $height ) { |
| 162 | return array(); |
| 163 | } |
| 164 | |
| 165 | $img_src = wp_get_attachment_image_src( $thumb, array( 1200, 1200 ) ); |
| 166 | |
| 167 | if ( empty( $img_src ) ) { |
| 168 | return array(); |
| 169 | } |
| 170 | |
| 171 | return array( |
| 172 | 'src' => $img_src[0], |
| 173 | 'src_width' => $img_src[1], |
| 174 | 'src_height' => $img_src[2], |
| 175 | ); |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Clean up text meant to be used as Description Open Graph tag. |
| 180 | * |
| 181 | * There should be: |
| 182 | * - no links |
| 183 | * - no shortcodes |
| 184 | * - no html tags or their contents |
| 185 | * - not too many words. |
| 186 | * |
| 187 | * @param string $description Text coming from WordPress (autogenerated or manually generated by author). |
| 188 | * @param WP_Post|null $data Information about our post. |
| 189 | * |
| 190 | * @return string $description Cleaned up description string. |
| 191 | */ |
| 192 | public function get_description( $description = '', $data = null ) { |
| 193 | // Remove tags such as <style or <script. |
| 194 | $description = wp_strip_all_tags( $description ); |
| 195 | |
| 196 | /* |
| 197 | * Clean up any plain text entities left into formatted entities. |
| 198 | * Intentionally not using a filter to prevent pollution. |
| 199 | * @see https://github.com/Automattic/jetpack/pull/2899#issuecomment-151957382 |
| 200 | */ |
| 201 | $description = wp_kses( |
| 202 | trim( |
| 203 | convert_chars( |
| 204 | wptexturize( $description ) |
| 205 | ) |
| 206 | ), |
| 207 | array() |
| 208 | ); |
| 209 | |
| 210 | // Remove shortcodes. |
| 211 | $description = strip_shortcodes( $description ); |
| 212 | |
| 213 | // Remove links. |
| 214 | $description = preg_replace( |
| 215 | '@https?://[\S]+@', |
| 216 | '', |
| 217 | $description |
| 218 | ); |
| 219 | |
| 220 | /* |
| 221 | * Limit things to a small text blurb. |
| 222 | * There isn't a hard limit set by Facebook, so let's rely on WP's own limit. |
| 223 | * (55 words or the localized equivalent). |
| 224 | * This limit can be customized with the wp_trim_words filter. |
| 225 | */ |
| 226 | $description = wp_trim_words( $description ); |
| 227 | |
| 228 | // Let's set a default if we have no text by now. |
| 229 | if ( empty( $description ) ) { |
| 230 | /** This filter is documented in projects/plugins/jetpack/functions.opengraph.php */ |
| 231 | $description = apply_filters( |
| 232 | 'jetpack_open_graph_fallback_description', |
| 233 | __( 'Visit the post for more.', 'jetpack-social' ), |
| 234 | $data |
| 235 | ); |
| 236 | } |
| 237 | |
| 238 | // Trim the description if it's still too long, and add an ellipsis. |
| 239 | $description_length = 197; |
| 240 | $description = mb_strimwidth( $description, 0, $description_length, '…' ); |
| 241 | |
| 242 | return $description; |
| 243 | } |
| 244 | |
| 245 | /** |
| 246 | * To set a custom OG:title for social notes. |
| 247 | */ |
| 248 | public function get_og_title_for_social_notes() { |
| 249 | $text = wp_strip_all_tags( get_the_excerpt() ); |
| 250 | $length = 55; |
| 251 | $ellipsis = "\u{2026}"; |
| 252 | |
| 253 | if ( strlen( $text ) <= $length ) { |
| 254 | return $text; |
| 255 | } |
| 256 | |
| 257 | $words = str_word_count( $text, 2 ); |
| 258 | $indices = array_keys( $words ); |
| 259 | |
| 260 | // There is only one word, or the first word plus initial non-word characters, is longer than 55 characters. |
| 261 | if ( count( $indices ) === 1 || $indices[0] + strlen( $words[ $indices[0] ] ) > $length ) { |
| 262 | return substr( $text, 0, $length ) . $ellipsis; |
| 263 | } |
| 264 | |
| 265 | $substring_index = 0; |
| 266 | foreach ( $indices as $current_index ) { |
| 267 | $current_length = $current_index + strlen( $words[ $current_index ] ); |
| 268 | if ( $current_length > $length ) { |
| 269 | $substring_index = $current_index - 1; |
| 270 | break; |
| 271 | } |
| 272 | $substring_index = $current_length; |
| 273 | } |
| 274 | return substr( $text, 0, $substring_index ) . $ellipsis; |
| 275 | } |
| 276 | |
| 277 | /** |
| 278 | * Filters the OG tags when we are displaying a Social Note, |
| 279 | * and adjusts the title. This allows us to adjust the title |
| 280 | * when Jetpack is active as well as social. |
| 281 | * |
| 282 | * @param array $tags The array of OG tags so far. |
| 283 | */ |
| 284 | public function get_note_title( $tags ) { |
| 285 | if ( ! isset( $tags['og:title'] ) || empty( trim( $tags['og:title'] ) ) ) { |
| 286 | $tags['og:title'] = $this->get_og_title_for_social_notes(); |
| 287 | } |
| 288 | return $tags; |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Render meta tags in head. |
| 293 | * |
| 294 | * @param WP_Post|null $post The post to render the tags for. |
| 295 | */ |
| 296 | public function render_tags( $post = null ) { |
| 297 | $data = get_post( $post ); |
| 298 | if ( empty( $data ) ) { |
| 299 | return; |
| 300 | } |
| 301 | |
| 302 | if ( $data->post_type === Note::JETPACK_SOCIAL_NOTE_CPT ) { |
| 303 | add_filter( 'jetpack_open_graph_tags', array( $this, 'get_note_title' ) ); |
| 304 | } |
| 305 | |
| 306 | if ( ! $this->should_render_meta_tags() ) { |
| 307 | return; |
| 308 | } |
| 309 | |
| 310 | $tags = array(); |
| 311 | |
| 312 | /** This filter is documented in core/src/wp-includes/post-template.php */ |
| 313 | $tags['og:title'] = wp_kses( apply_filters( 'the_title', $data->post_title, $data->ID ), array() ); |
| 314 | $tags['og:url'] = get_permalink( $data->ID ); |
| 315 | if ( ! post_password_required( $data ) ) { |
| 316 | $excerpt = ''; |
| 317 | |
| 318 | /* |
| 319 | * If the post author set an excerpt, use that. |
| 320 | * Otherwise, pick the post content that comes before the More tag if there is one. |
| 321 | * Do not use the post content if it contains premium content. |
| 322 | */ |
| 323 | if ( ! empty( $data->post_excerpt ) ) { |
| 324 | $excerpt = $data->post_excerpt; |
| 325 | } elseif ( ! has_block( 'premium-content/container', $data->post_content ) ) { |
| 326 | $excerpt = explode( '<!--more-->', $data->post_content )[0]; |
| 327 | } |
| 328 | |
| 329 | $tags['og:description'] = $this->get_description( $excerpt ); |
| 330 | } |
| 331 | |
| 332 | $image = $this->get_featured_image(); |
| 333 | |
| 334 | if ( ! empty( $image ) ) { |
| 335 | $tags = array_merge( |
| 336 | $tags, |
| 337 | array( |
| 338 | 'og:image' => $image['src'], |
| 339 | 'og:image:width' => $image['src_width'], |
| 340 | 'og:image:height' => $image['src_height'], |
| 341 | ) |
| 342 | ); |
| 343 | } |
| 344 | |
| 345 | /** This filter is documented in projects/plugins/jetpack/functions.opengraph.php */ |
| 346 | $image_width = absint( apply_filters( 'jetpack_open_graph_image_width', 200 ) ); |
| 347 | |
| 348 | /** This filter is documented in projects/plugins/jetpack/functions.opengraph.php */ |
| 349 | $image_height = absint( apply_filters( 'jetpack_open_graph_image_height', 200 ) ); |
| 350 | |
| 351 | /** This filter is documented in projects/plugins/jetpack/functions.opengraph.php */ |
| 352 | $tags = apply_filters( 'jetpack_open_graph_tags', $tags, compact( 'image_width', 'image_height' ) ); |
| 353 | if ( empty( trim( $tags['og:title'] ) ) ) { |
| 354 | $tags['og:title'] = __( '(no title)', 'jetpack-social' ); |
| 355 | } |
| 356 | |
| 357 | if ( ! empty( $tags['og:image'] ) && $this->should_render_twitter_cards_tags() ) { |
| 358 | $tags = array_merge( |
| 359 | $tags, |
| 360 | array( |
| 361 | 'twitter:image' => $tags['og:image'], |
| 362 | 'twitter:card' => 'summary_large_image', |
| 363 | ) |
| 364 | ); |
| 365 | } |
| 366 | |
| 367 | echo '<!-- Generated by Jetpack Social -->' . PHP_EOL; |
| 368 | |
| 369 | foreach ( $tags as $property => $content ) { |
| 370 | $label = ! str_contains( $property, 'twitter' ) ? 'property' : 'name'; |
| 371 | |
| 372 | if ( $content ) { |
| 373 | printf( '<meta %1$s="%2$s" content="%3$s">' . PHP_EOL, esc_attr( $label ), esc_attr( $property ), esc_attr( $content ) ); |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | echo '<!-- / Jetpack Social -->' . PHP_EOL; |
| 378 | } |
| 379 | } |