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<?php |
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/** |
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* Class to handle affiliate codes. |
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* |
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* @package affiliate |
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*/ |
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namespace Automattic\Jetpack\Partners; |
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/** |
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* This class introduces routines to get an affiliate code, that might be obtained from: |
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* - a `jetpack_affiliate_code` option in the WP database |
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* - an affiliate code returned by a filter bound to the `jetpack_affiliate_code` filter hook |
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*/ |
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class Affiliate { |
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/** |
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* Class instance |
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* |
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* @var Affiliate This class instance. |
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**/ |
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private static $instance = null; |
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/** |
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* Initializes the class or returns the singleton |
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* |
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* @return Affiliate | false |
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*/ |
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public static function init() { |
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if ( is_null( self::$instance ) ) { |
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self::$instance = new Affiliate(); |
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} |
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return self::$instance; |
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} |
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/** |
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* Returns the affiliate code from database after filtering it. |
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* |
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* @return string The affiliate code. |
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*/ |
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public function get_affiliate_code() { |
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/** |
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* Allow to filter the affiliate code. |
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* |
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* @param string $aff_code The affiliate code, blank by default. |
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*/ |
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return apply_filters( 'jetpack_affiliate_code', get_option( 'jetpack_affiliate_code', '' ) ); |
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} |
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/** |
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* Returns the passed URL with the affiliate code added as a URL query arg. |
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* |
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* @param string $url The URL where the code will be added. |
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* |
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* @return string The passed URL with the code added. |
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*/ |
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public function add_code_as_query_arg( $url ) { |
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$aff = $this->get_affiliate_code(); |
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if ( '' !== $aff ) { |
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$url = add_query_arg( 'aff', $aff, $url ); |
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} |
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return $url; |
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} |
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} |
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Automattic /
jetpack
