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<?php |
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/** |
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* Class containing utility static methods that other SEO tools are relying on. |
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*/ |
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class Jetpack_SEO_Utils { |
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/** |
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* Site option name used to store front page meta description. |
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*/ |
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const FRONT_PAGE_META_OPTION = 'advanced_seo_front_page_description'; |
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/** |
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* Old version of option name that was previously used under Free plan. |
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*/ |
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const GRANDFATHERED_META_OPTION = 'seo_meta_description'; |
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/** |
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* Used to check whether SEO tools are enabled for given site. |
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* |
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* @param int $site_id Optional. Defaults to current blog id if not given. |
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* |
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* @return bool True if SEO tools are enabled, false otherwise. |
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*/ |
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public static function is_enabled_jetpack_seo( $site_id = 0 ) { |
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if ( function_exists( 'has_blog_sticker' ) ) { |
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// For WPCOM sites |
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if ( empty( $site_id ) ) { |
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$site_id = get_current_blog_id(); |
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} |
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return has_blog_sticker( 'unlimited-premium-themes', $site_id ); |
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} |
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// For all Jetpack sites |
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return true; |
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} |
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/** |
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* Checks if this option was set while it was still available under free plan. |
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* |
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* @return bool True if we should enable grandfathering, false otherwise. |
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*/ |
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public static function has_grandfathered_front_page_meta() { |
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return ! self::is_enabled_jetpack_seo() && get_option( self::GRANDFATHERED_META_OPTION ); |
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} |
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/** |
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* Returns front page meta description for current site. |
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* |
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* Since we allowed non-business users to set Front page meta description for some time, |
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* before bundling it with other SEO tools features that require a business plan, |
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* we are supporting grandfathering here. |
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* |
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* @return string Front page meta description string or empty string. |
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*/ |
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public static function get_front_page_meta_description() { |
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if ( self::is_enabled_jetpack_seo() ) { |
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$front_page_meta = get_option( self::FRONT_PAGE_META_OPTION ); |
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return $front_page_meta ? $front_page_meta : get_option( self::GRANDFATHERED_META_OPTION, '' ); |
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} |
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// Support grandfathering for non-business users. |
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return get_option( self::GRANDFATHERED_META_OPTION, '' ); |
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} |
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/** |
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* Updates the site option value for front page meta description. |
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* |
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* We are taking care to update the correct option, in case the value is grandfathered for current site. |
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* |
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* @param $value string New value for front page meta description. |
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* |
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* @return string Saved value, or empty string if no update was performed. |
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*/ |
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public static function update_front_page_meta_description( $value ) { |
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$front_page_description = sanitize_text_field( $value ); |
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/** |
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* Can be used to limit the lenght of front page meta description. |
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* |
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* @module seo-tools |
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* |
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* @since 4.4.0 |
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* |
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* @param int Maximum length of front page meta description. Defaults to 300. |
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*/ |
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$description_max_length = apply_filters( 'jetpack_seo_front_page_description_max_length', 300 ); |
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if ( function_exists( 'mb_substr' ) ) { |
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$front_page_description = mb_substr( $front_page_description, 0, $description_max_length ); |
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} else { |
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$front_page_description = substr( $front_page_description, 0, $description_max_length ); |
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} |
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$can_set_meta = self::is_enabled_jetpack_seo(); |
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$grandfathered_meta_option = get_option( self::GRANDFATHERED_META_OPTION ); |
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$has_old_meta = ! empty( $grandfathered_meta_option ); |
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$option_name = self::has_grandfathered_front_page_meta() ? self::GRANDFATHERED_META_OPTION : self::FRONT_PAGE_META_OPTION; |
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$did_update = update_option( $option_name, $front_page_description ); |
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if ( $did_update && $has_old_meta && $can_set_meta ) { |
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// Delete grandfathered option if user has switched to Business plan and updated meta description. |
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delete_option( 'seo_meta_description' ); |
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} |
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if ( $did_update ) { |
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return $front_page_description; |
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} |
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return ''; |
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} |
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} |
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Automattic /
jetpack
