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*/ private $cache = array(); /** * Unique feature id. * * @var string * * @phpstan-var non-empty-string */ private $feature_id; /** * Condition to meet for the compatibility to be enabled along the feature. * * @var callable */ private $condition_to_meet; /** * Constructor. * * @since 1.9.1 * * @param string $feature_id Unique feature id. * @param callable $condition_to_meet Condition to meet for our compatibility to be enabled along the feature. * * @phpstan-param non-empty-string $feature_id */ public function __construct( string $feature_id, callable $condition_to_meet ) { $this->feature_id = $feature_id; $this->condition_to_meet = $condition_to_meet; } /** * Tells if PLLWC can use the WC's feature. * * @since 1.9 * * @return bool */ public function exists(): bool { if ( isset( $this->cache[ __FUNCTION__ ] ) ) { return $this->cache[ __FUNCTION__ ]; } // Require WC 7.1+. if ( ! class_exists( FeaturesUtil::class ) ) { $this->cache[ __FUNCTION__ ] = false; } else { $features = FeaturesUtil::get_features( true ); $this->cache[ __FUNCTION__ ] = ! empty( $features[ $this->feature_id ] ); } return $this->cache[ __FUNCTION__ ]; } /** * Tells if the feature is enabled. * Must not be used before {@see self::exists()}. * * @since 1.9 * * @return bool */ public function is_enabled(): bool { if ( isset( $this->cache[ __FUNCTION__ ] ) ) { return $this->cache[ __FUNCTION__ ]; } if ( ! $this->exists() ) { $this->cache[ __FUNCTION__ ] = false; return $this->cache[ __FUNCTION__ ]; } // Check for the whole feature. if ( ! FeaturesUtil::feature_is_enabled( $this->feature_id ) ) { $this->cache[ __FUNCTION__ ] = false; return $this->cache[ __FUNCTION__ ]; } // Check that our compatibility can be enabled. $this->cache[ __FUNCTION__ ] = (bool) call_user_func( $this->condition_to_meet ); return $this->cache[ __FUNCTION__ ]; } /** * Calls the method that declares this plugin compatible with WC's feature. * * @since 1.9 * * @return void */ public function declare_compatibility() { if ( $this->exists() ) { add_action( 'before_woocommerce_init', array( $this, 'declare_compatibility_callback' ) ); } } /** * Declares this plugin compatible with WC's feature. * * @since 1.9 * * @return void */ public function declare_compatibility_callback() { // Can only be used in the hook `before_woocommerce_init`. See https://github.com/woocommerce/woocommerce/blob/8.4.0/plugins/woocommerce/src/Utilities/FeaturesUtil.php#L45-L57. FeaturesUtil::declare_compatibility( $this->feature_id, PLLWC_FILE, true ); } }