class-jetpack-seo-admin-columns.php
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class-jetpack-seo-posts.php
3 weeks ago
class-jetpack-seo-titles.php
3 years ago
class-jetpack-seo-utils.php
7 months ago
class-jetpack-seo.php
1 month ago
class-jetpack-seo-titles.php
351 lines
| 1 | <?php |
| 2 | /** |
| 3 | * Class containing utility static methods for managing SEO custom title formats. |
| 4 | * |
| 5 | * @package automattic/jetpack |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * Each title format is an array of arrays containing two values: |
| 10 | * - type |
| 11 | * - value |
| 12 | * |
| 13 | * Possible values for type are: 'token' and 'string'. |
| 14 | * Possible values for 'value' are: any string in case that 'type' is set |
| 15 | * to 'string', or allowed token values for page type in case that 'type' |
| 16 | * is set to 'token'. |
| 17 | * |
| 18 | * Examples of valid formats: |
| 19 | * |
| 20 | * [ |
| 21 | * 'front_page' => [ |
| 22 | * [ 'type' => 'string', 'value' => 'Front page title and site name:'], |
| 23 | * [ 'type' => 'token', 'value' => 'site_name'] |
| 24 | * ], |
| 25 | * 'posts' => [ |
| 26 | * [ 'type' => 'token', 'value' => 'site_name' ], |
| 27 | * [ 'type' => 'string', 'value' => ' | ' ], |
| 28 | * [ 'type' => 'token', 'value' => 'post_title' ] |
| 29 | * ], |
| 30 | * 'pages' => [], |
| 31 | * 'groups' => [], |
| 32 | * 'archives' => [] |
| 33 | * ] |
| 34 | * Custom title for given page type is created by concatenating all of the array 'value' parts. |
| 35 | * Tokens are replaced with their corresponding values for current site. |
| 36 | * Empty array signals that we are not overriding the default title for particular page type. |
| 37 | */ |
| 38 | |
| 39 | /** |
| 40 | * Class containing utility static methods for managing SEO custom title formats. |
| 41 | */ |
| 42 | class Jetpack_SEO_Titles { |
| 43 | /** |
| 44 | * Site option name used to store custom title formats. |
| 45 | */ |
| 46 | const TITLE_FORMATS_OPTION = 'advanced_seo_title_formats'; |
| 47 | |
| 48 | /** |
| 49 | * Retrieves custom title formats from site option. |
| 50 | * |
| 51 | * @return array Array of custom title formats, or empty array. |
| 52 | */ |
| 53 | public static function get_custom_title_formats() { |
| 54 | if ( Jetpack_SEO_Utils::is_enabled_jetpack_seo() ) { |
| 55 | return get_option( self::TITLE_FORMATS_OPTION, array() ); |
| 56 | } |
| 57 | |
| 58 | return array(); |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * Returns tokens that are currently supported for each page type. |
| 63 | * |
| 64 | * @return array Array of allowed token strings. |
| 65 | */ |
| 66 | public static function get_allowed_tokens() { |
| 67 | return array( |
| 68 | 'front_page' => array( 'site_name', 'tagline' ), |
| 69 | 'posts' => array( 'site_name', 'tagline', 'post_title' ), |
| 70 | 'pages' => array( 'site_name', 'tagline', 'page_title' ), |
| 71 | 'groups' => array( 'site_name', 'tagline', 'group_title' ), |
| 72 | 'archives' => array( 'site_name', 'tagline', 'date', 'archive_title' ), |
| 73 | ); |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Used to modify the default title with custom SEO title. |
| 78 | * |
| 79 | * @param string $default_title Default title for current page. |
| 80 | * |
| 81 | * @return string A custom per-post title, custom title structure with replaced tokens, or default title. |
| 82 | */ |
| 83 | public static function get_custom_title( $default_title = '' ) { |
| 84 | // Don't filter title for unsupported themes. |
| 85 | if ( self::is_conflicted_theme() ) { |
| 86 | return $default_title; |
| 87 | } |
| 88 | |
| 89 | $page_type = self::get_page_type(); |
| 90 | |
| 91 | // Keep default title if invalid page type is supplied. |
| 92 | if ( empty( $page_type ) ) { |
| 93 | return $default_title; |
| 94 | } |
| 95 | |
| 96 | if ( ! Jetpack_SEO_Utils::is_enabled_jetpack_seo() ) { |
| 97 | return $default_title; |
| 98 | } |
| 99 | |
| 100 | // If it's a singular -- page or post -- check for a meta title override. |
| 101 | if ( 'pages' === $page_type || 'posts' === $page_type ) { |
| 102 | $post = get_post(); |
| 103 | if ( $post instanceof WP_Post ) { |
| 104 | $custom_title = get_post_meta( $post->ID, Jetpack_SEO_Posts::HTML_TITLE_META_KEY, true ); |
| 105 | if ( ! empty( trim( $custom_title ) ) ) { |
| 106 | return esc_html( $custom_title ); |
| 107 | } |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | $title_formats = self::get_custom_title_formats(); |
| 112 | |
| 113 | // Keep default title if user has not defined custom title for this page type. |
| 114 | if ( empty( $title_formats[ $page_type ] ) ) { |
| 115 | return $default_title; |
| 116 | } |
| 117 | |
| 118 | $custom_title = ''; |
| 119 | $format_array = $title_formats[ $page_type ]; |
| 120 | |
| 121 | foreach ( $format_array as $item ) { |
| 122 | if ( 'token' === $item['type'] ) { |
| 123 | $custom_title .= self::get_token_value( $item['value'] ); |
| 124 | } else { |
| 125 | $custom_title .= $item['value']; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | return esc_html( $custom_title ); |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * Returns string value for given token. |
| 134 | * |
| 135 | * @param string $token_name The token name value that should be replaced. |
| 136 | * |
| 137 | * @return string Token replacement for current site, or empty string for unknown token name. |
| 138 | */ |
| 139 | public static function get_token_value( $token_name ) { |
| 140 | |
| 141 | switch ( $token_name ) { |
| 142 | case 'site_name': |
| 143 | return get_bloginfo( 'name' ); |
| 144 | |
| 145 | case 'tagline': |
| 146 | return get_bloginfo( 'description' ); |
| 147 | |
| 148 | case 'post_title': |
| 149 | case 'page_title': |
| 150 | return the_title_attribute( array( 'echo' => false ) ); |
| 151 | |
| 152 | case 'group_title': |
| 153 | return single_tag_title( '', false ); |
| 154 | |
| 155 | case 'date': |
| 156 | case 'archive_title': |
| 157 | return self::get_archive_title(); |
| 158 | |
| 159 | default: |
| 160 | return ''; |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * Returns page type for current page. We need this helper in order to determine what |
| 166 | * user defined title format should be used for custom title. |
| 167 | * |
| 168 | * @return string|bool Type of current page or false if unsupported. |
| 169 | */ |
| 170 | public static function get_page_type() { |
| 171 | |
| 172 | if ( is_front_page() ) { |
| 173 | return 'front_page'; |
| 174 | } |
| 175 | |
| 176 | if ( is_category() || is_tag() || is_tax() ) { |
| 177 | return 'groups'; |
| 178 | } |
| 179 | |
| 180 | if ( is_archive() && ! is_author() ) { |
| 181 | return 'archives'; |
| 182 | } |
| 183 | |
| 184 | if ( is_page() ) { |
| 185 | return 'pages'; |
| 186 | } |
| 187 | |
| 188 | if ( is_singular() ) { |
| 189 | return 'posts'; |
| 190 | } |
| 191 | |
| 192 | return false; |
| 193 | } |
| 194 | |
| 195 | /** |
| 196 | * Returns the value that should be used as a replacement for the `date` or `archive_title` tokens. |
| 197 | * For date-based archives, a date is returned. Otherwise the `post_type_archive_title` is returned. |
| 198 | * |
| 199 | * The `archive_title` token was added after the `date` token to provide a more generic option |
| 200 | * that would work for non date-based archives. |
| 201 | * |
| 202 | * @return string Token replaced string. |
| 203 | */ |
| 204 | public static function get_archive_title() { |
| 205 | // If archive year, month, and day are specified. |
| 206 | if ( is_day() ) { |
| 207 | return get_the_date(); |
| 208 | } |
| 209 | |
| 210 | // If archive year, and month are specified. |
| 211 | if ( is_month() ) { |
| 212 | return trim( single_month_title( ' ', false ) ); |
| 213 | } |
| 214 | |
| 215 | // Only archive year is specified. |
| 216 | if ( is_year() ) { |
| 217 | return get_query_var( 'year' ); |
| 218 | } |
| 219 | |
| 220 | // Not a date based archive. |
| 221 | // An example would be "Projects" for Jetpack's Portoflio CPT. |
| 222 | return post_type_archive_title( '', false ); |
| 223 | } |
| 224 | |
| 225 | /** |
| 226 | * Checks if current theme is defining custom title that won't work nicely |
| 227 | * with our custom SEO title override. |
| 228 | * |
| 229 | * @return bool True if current theme sets custom title, false otherwise. |
| 230 | */ |
| 231 | public static function is_conflicted_theme() { |
| 232 | /** |
| 233 | * Can be used to specify a list of themes that use their own custom title format. |
| 234 | * |
| 235 | * If current site is using one of the themes listed as conflicting, |
| 236 | * Jetpack SEO custom title formats will be disabled. |
| 237 | * |
| 238 | * @module seo-tools |
| 239 | * |
| 240 | * @since 4.4.0 |
| 241 | * |
| 242 | * @param array List of conflicted theme names. Defaults to empty array. |
| 243 | */ |
| 244 | $conflicted_themes = apply_filters( 'jetpack_seo_custom_title_conflicted_themes', array() ); |
| 245 | |
| 246 | return isset( $conflicted_themes[ get_option( 'template' ) ] ); |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Checks if a given format conforms to predefined SEO title templates. |
| 251 | * |
| 252 | * Every format type and token must be specifically allowed. |
| 253 | * |
| 254 | * @see get_allowed_tokens() |
| 255 | * |
| 256 | * @param array $title_formats Template of SEO title to check. |
| 257 | * |
| 258 | * @return bool True if the formats are valid, false otherwise. |
| 259 | */ |
| 260 | public static function are_valid_title_formats( $title_formats ) { |
| 261 | $allowed_tokens = self::get_allowed_tokens(); |
| 262 | |
| 263 | if ( ! is_array( $title_formats ) ) { |
| 264 | return false; |
| 265 | } |
| 266 | |
| 267 | foreach ( $title_formats as $format_type => $format_array ) { |
| 268 | if ( ! array_key_exists( $format_type, $allowed_tokens ) ) { |
| 269 | return false; |
| 270 | } |
| 271 | |
| 272 | if ( '' === $format_array ) { |
| 273 | continue; |
| 274 | } |
| 275 | |
| 276 | if ( ! is_array( $format_array ) ) { |
| 277 | return false; |
| 278 | } |
| 279 | |
| 280 | foreach ( $format_array as $item ) { |
| 281 | if ( empty( $item['type'] ) || empty( $item['value'] ) ) { |
| 282 | return false; |
| 283 | } |
| 284 | |
| 285 | if ( 'token' === $item['type'] ) { |
| 286 | if ( ! in_array( $item['value'], $allowed_tokens[ $format_type ], true ) ) { |
| 287 | return false; |
| 288 | } |
| 289 | } |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | return true; |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * Sanitizes the arbitrary user input strings for custom SEO titles. |
| 298 | * |
| 299 | * @param array $title_formats Array of custom title formats. |
| 300 | * |
| 301 | * @return array The sanitized array. |
| 302 | */ |
| 303 | public static function sanitize_title_formats( $title_formats ) { |
| 304 | foreach ( $title_formats as &$format_array ) { |
| 305 | foreach ( $format_array as &$item ) { |
| 306 | if ( 'string' === $item['type'] ) { |
| 307 | // From `wp_strip_all_tags`, but omitting the `trim` portion since we want spacing preserved. |
| 308 | $item['value'] = preg_replace( '@<(script|style)[^>]*?>.*?</\\1>@si', '', $item['value'] ); |
| 309 | $item['value'] = strip_tags( $item['value'] ); // phpcs:ignore WordPress.WP.AlternativeFunctions.strip_tags_strip_tags |
| 310 | $item['value'] = preg_replace( '/[\r\n\t ]+/', ' ', $item['value'] ); |
| 311 | } |
| 312 | } |
| 313 | } |
| 314 | unset( $format_array ); |
| 315 | unset( $item ); |
| 316 | |
| 317 | return $title_formats; |
| 318 | } |
| 319 | |
| 320 | /** |
| 321 | * Combines the previous values of title formats, stored as array in site options, |
| 322 | * with the new values that are provided. |
| 323 | * |
| 324 | * @param array $new_formats Array containing new title formats. |
| 325 | * |
| 326 | * @return array $result Array of updated title formats, or empty array if no update was performed. |
| 327 | */ |
| 328 | public static function update_title_formats( $new_formats ) { |
| 329 | $new_formats = self::sanitize_title_formats( $new_formats ); |
| 330 | |
| 331 | // Empty array signals that custom title shouldn't be used. |
| 332 | $empty_formats = array( |
| 333 | 'front_page' => array(), |
| 334 | 'posts' => array(), |
| 335 | 'pages' => array(), |
| 336 | 'groups' => array(), |
| 337 | 'archives' => array(), |
| 338 | ); |
| 339 | |
| 340 | $previous_formats = self::get_custom_title_formats(); |
| 341 | |
| 342 | $result = array_merge( $empty_formats, $previous_formats, $new_formats ); |
| 343 | |
| 344 | if ( update_option( self::TITLE_FORMATS_OPTION, $result ) ) { |
| 345 | return $result; |
| 346 | } |
| 347 | |
| 348 | return array(); |
| 349 | } |
| 350 | } |
| 351 |