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| 1 | <?php |
| 2 | /** |
| 3 | * Class containing utility static methods that other SEO tools are relying on. |
| 4 | * |
| 5 | * @package automattic/jetpack |
| 6 | */ |
| 7 | |
| 8 | /** |
| 9 | * Class containing utility static methods that other SEO tools are relying on. |
| 10 | */ |
| 11 | class Jetpack_SEO_Utils { |
| 12 | /** |
| 13 | * Site option name used to store front page meta description. |
| 14 | */ |
| 15 | const FRONT_PAGE_META_OPTION = 'advanced_seo_front_page_description'; |
| 16 | |
| 17 | /** |
| 18 | * The LEGACY_META_OPTION is used to support legacy usage on WPcom simple sites (free or paid). |
| 19 | * For WPorg JP sites, the JP seo-tools features were made free for all sites (free or paid). |
| 20 | */ |
| 21 | const LEGACY_META_OPTION = 'seo_meta_description'; |
| 22 | |
| 23 | /** |
| 24 | * Used to check whether SEO tools are enabled for given site. |
| 25 | * |
| 26 | * @return bool True if SEO tools are enabled, false otherwise. |
| 27 | */ |
| 28 | public static function is_enabled_jetpack_seo() { |
| 29 | /** |
| 30 | * Can be used by SEO plugin authors to disable the conflicting output of SEO Tools. |
| 31 | * |
| 32 | * @module seo-tools |
| 33 | * |
| 34 | * @since 5.0.0 |
| 35 | * |
| 36 | * @param bool True if SEO Tools should be disabled, false otherwise. |
| 37 | */ |
| 38 | if ( apply_filters( 'jetpack_disable_seo_tools', false ) ) { |
| 39 | return false; |
| 40 | } |
| 41 | |
| 42 | if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) { |
| 43 | return wpcom_site_has_feature( 'advanced-seo', get_current_blog_id() ); |
| 44 | } |
| 45 | |
| 46 | return true; |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * Checks if this option was set while it was freely available to all WPcom simple sites. |
| 51 | * |
| 52 | * @return bool True if we should enable legacy usage, false otherwise. |
| 53 | */ |
| 54 | public static function has_legacy_front_page_meta() { |
| 55 | return ! self::is_enabled_jetpack_seo() && get_option( self::LEGACY_META_OPTION ); |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * Returns front page meta description for current site. |
| 60 | * |
| 61 | * @return string Front page meta description string or empty string. |
| 62 | */ |
| 63 | public static function get_front_page_meta_description() { |
| 64 | if ( self::is_enabled_jetpack_seo() ) { |
| 65 | $front_page_meta = get_option( self::FRONT_PAGE_META_OPTION ); |
| 66 | return $front_page_meta ? $front_page_meta : get_option( self::LEGACY_META_OPTION, '' ); |
| 67 | } |
| 68 | |
| 69 | // Support legacy usage for WPcom simple sites. |
| 70 | return get_option( self::LEGACY_META_OPTION, '' ); |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * Sanitizes the custom front page meta description input. |
| 75 | * |
| 76 | * @param string $value Front page meta string. |
| 77 | * |
| 78 | * @return string The sanitized string. |
| 79 | */ |
| 80 | public static function sanitize_front_page_meta_description( $value ) { |
| 81 | return wp_strip_all_tags( $value ); |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Updates the site option value for front page meta description. |
| 86 | * |
| 87 | * @param string $value New value for front page meta description. |
| 88 | * |
| 89 | * @return string Saved value, or empty string if no update was performed. |
| 90 | */ |
| 91 | public static function update_front_page_meta_description( $value ) { |
| 92 | $front_page_description = self::sanitize_front_page_meta_description( $value ); |
| 93 | |
| 94 | /** |
| 95 | * Can be used to limit the length of front page meta description. |
| 96 | * |
| 97 | * @module seo-tools |
| 98 | * |
| 99 | * @since 4.4.0 |
| 100 | * |
| 101 | * @param int Maximum length of front page meta description. Defaults to 300. |
| 102 | */ |
| 103 | $description_max_length = apply_filters( 'jetpack_seo_front_page_description_max_length', 300 ); |
| 104 | |
| 105 | if ( function_exists( 'mb_substr' ) ) { |
| 106 | $front_page_description = mb_substr( $front_page_description, 0, $description_max_length ); |
| 107 | } else { |
| 108 | $front_page_description = substr( $front_page_description, 0, $description_max_length ); |
| 109 | } |
| 110 | |
| 111 | $can_set_meta = self::is_enabled_jetpack_seo(); |
| 112 | $legacy_meta_option = get_option( self::LEGACY_META_OPTION ); |
| 113 | $has_old_meta = ! empty( $legacy_meta_option ); |
| 114 | $option_name = self::has_legacy_front_page_meta() ? self::LEGACY_META_OPTION : self::FRONT_PAGE_META_OPTION; |
| 115 | |
| 116 | $did_update = update_option( $option_name, $front_page_description ); |
| 117 | |
| 118 | if ( $did_update && $has_old_meta && $can_set_meta ) { |
| 119 | // Delete legacy option if user has switched to Business or eCommerce plan and updated the front page meta description. |
| 120 | delete_option( self::LEGACY_META_OPTION ); |
| 121 | } |
| 122 | |
| 123 | if ( $did_update ) { |
| 124 | return $front_page_description; |
| 125 | } |
| 126 | |
| 127 | return ''; |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * Remove content within wp:query blocks. |
| 132 | * |
| 133 | * @uses jetpack_og_remove_query_blocks |
| 134 | * |
| 135 | * @since 14.9 |
| 136 | * |
| 137 | * @param string $content Post content. |
| 138 | * |
| 139 | * @return string Post content stripped from wp:query blocks. |
| 140 | */ |
| 141 | public static function remove_query_blocks( $content ) { |
| 142 | if ( ! function_exists( 'jetpack_og_remove_query_blocks' ) ) { |
| 143 | return $content; |
| 144 | } |
| 145 | |
| 146 | return jetpack_og_remove_query_blocks( $content ); |
| 147 | } |
| 148 | } |