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<?php
/**
* Class containing utility static methods that other SEO tools are relying on.
*/
class Jetpack_SEO_Utils {
/**
* Site option name used to store front page meta description.
*/
const FRONT_PAGE_META_OPTION = 'advanced_seo_front_page_description';
/**
* Old version of option name that was previously used under Free plan.
*/
const GRANDFATHERED_META_OPTION = 'seo_meta_description';
/**
* Used to check whether SEO tools are enabled for given site.
*
* @param int $site_id Optional. Defaults to current blog id if not given.
*
* @return bool True if SEO tools are enabled, false otherwise.
*/
public static function is_enabled_jetpack_seo( $site_id = 0 ) {
/**
* Can be used by SEO plugin authors to disable the conflicting output of SEO Tools.
*
* @module seo-tools
*
* @since 5.0.0
*
* @param bool True if SEO Tools should be disabled, false otherwise.
*/
if ( apply_filters( 'jetpack_disable_seo_tools', false ) ) {
return false;
}
if ( function_exists( 'has_any_blog_stickers' ) ) {
// For WPCOM sites
if ( empty( $site_id ) ) {
$site_id = get_current_blog_id();
}
return has_any_blog_stickers( array( 'business-plan', 'ecommerce-plan' ), $site_id );
}
// For all Jetpack sites
return true;
}
/**
* Checks if this option was set while it was still available under free plan.
*
* @return bool True if we should enable grandfathering, false otherwise.
*/
public static function has_grandfathered_front_page_meta() {
return ! self::is_enabled_jetpack_seo() && get_option( self::GRANDFATHERED_META_OPTION );
}
/**
* Returns front page meta description for current site.
*
* Since we allowed non-business users to set Front page meta description for some time,
* before bundling it with other SEO tools features that require a business plan,
* we are supporting grandfathering here.
*
* @return string Front page meta description string or empty string.
*/
public static function get_front_page_meta_description() {
if ( self::is_enabled_jetpack_seo() ) {
$front_page_meta = get_option( self::FRONT_PAGE_META_OPTION );
return $front_page_meta ? $front_page_meta : get_option( self::GRANDFATHERED_META_OPTION, '' );
}
// Support grandfathering for non-business users.
return get_option( self::GRANDFATHERED_META_OPTION, '' );
}
/**
* Updates the site option value for front page meta description.
*
* We are taking care to update the correct option, in case the value is grandfathered for current site.
*
* @param $value string New value for front page meta description.
*
* @return string Saved value, or empty string if no update was performed.
*/
public static function update_front_page_meta_description( $value ) {
$front_page_description = sanitize_text_field( $value );
/**
* Can be used to limit the lenght of front page meta description.
*
* @module seo-tools
*
* @since 4.4.0
*
* @param int Maximum length of front page meta description. Defaults to 300.
*/
$description_max_length = apply_filters( 'jetpack_seo_front_page_description_max_length', 300 );
if ( function_exists( 'mb_substr' ) ) {
$front_page_description = mb_substr( $front_page_description, 0, $description_max_length );
} else {
$front_page_description = substr( $front_page_description, 0, $description_max_length );
}
$can_set_meta = self::is_enabled_jetpack_seo();
$grandfathered_meta_option = get_option( self::GRANDFATHERED_META_OPTION );
$has_old_meta = ! empty( $grandfathered_meta_option );
$option_name = self::has_grandfathered_front_page_meta() ? self::GRANDFATHERED_META_OPTION : self::FRONT_PAGE_META_OPTION;
$did_update = update_option( $option_name, $front_page_description );
if ( $did_update && $has_old_meta && $can_set_meta ) {
// Delete grandfathered option if user has switched to Business plan and updated meta description.
delete_option( 'seo_meta_description' );
}
if ( $did_update ) {
return $front_page_description;
}
return '';
}
}
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