Proxy class to access legacy WooCommerce functionality.
This class should be used to interact with code outside the src directory, especially functions and classes in the includes directory, unless a more specific proxy exists for the functionality at hand (e.g. ActionsProxy). Idempotent functions can be executed directly.
No Hooks.
Usage
$LegacyProxy = new LegacyProxy();
// use class methods
class LegacyProxy {
/**
* Gets an instance of a given legacy class.
* This must not be used to get instances of classes in the `src` directory.
*
* If a given class needs a special procedure to get an instance of it,
* please add a private get_instance_of_(lowercased_class_name) and it will be
* automatically invoked. See also how objects of classes having a static `instance`
* method are retrieved, similar approaches can be used as needed to make use
* of existing factory methods such as e.g. 'load'.
*
* @param string $class_name The name of the class to get an instance for.
* @param mixed ...$args Parameters to be passed to the class constructor or to the appropriate internal 'get_instance_of_' method.
*
* @return object The instance of the class.
* @throws \Exception The requested class has a namespace starting with ' Automattic\WooCommerce', or there was an error creating an instance of the class.
*/
public function get_instance_of( string $class_name, ...$args ) {
if ( StringUtil::starts_with( $class_name, 'Automattic\\WooCommerce\\' ) ) {
throw new \Exception(
'The LegacyProxy class is not intended for getting instances of classes whose namespace starts with \'Automattic\\WooCommerce\', please use ' .
Definition::INJECTION_METHOD . ' method injection or the instance of ' . ContainerInterface::class . ' for that.'
);
}
// If a class has a dedicated method to obtain a instance, use it.
$method = 'get_instance_of_' . strtolower( $class_name );
if ( method_exists( __CLASS__, $method ) ) {
return $this->$method( ...$args );
}
// If the class is a singleton, use the "instance" method.
if ( method_exists( $class_name, 'instance' ) ) {
return $class_name::instance( ...$args );
}
// If the class has a "load" method, use it.
if ( method_exists( $class_name, 'load' ) ) {
return $class_name::load( ...$args );
}
// Fallback to simply creating a new instance of the class.
return new $class_name( ...$args );
}
/**
* Get an instance of a class implementing WC_Queue_Interface.
*
* @return \WC_Queue_Interface The instance.
*/
private function get_instance_of_wc_queue_interface() {
return \WC_Queue::instance();
}
/**
* Call a user function. This should be used to execute any non-idempotent function, especially
* those in the `includes` directory or provided by WordPress.
*
* @param string $function_name The function to execute.
* @param mixed ...$parameters The parameters to pass to the function.
*
* @return mixed The result from the function.
*/
public function call_function( $function_name, ...$parameters ) {
return call_user_func_array( $function_name, $parameters );
}
/**
* Call a static method in a class. This should be used to execute any non-idempotent method in classes
* from the `includes` directory.
*
* @param string $class_name The name of the class containing the method.
* @param string $method_name The name of the method.
* @param mixed ...$parameters The parameters to pass to the method.
*
* @return mixed The result from the method.
*/
public function call_static( $class_name, $method_name, ...$parameters ) {
return call_user_func_array( "$class_name::$method_name", $parameters );
}
/**
* Get the value of a global.
*
* @param string $global_name The name of the global to get the value for.
* @return mixed The value of the global.
*/
public function get_global( string $global_name ) {
return $GLOBALS[ $global_name ];
}
/**
* Terminates execution of the script.
*
* @param int|string $status An error code to be returned, or an error message to be shown.
* @return void
*/
public function exit( $status = '' ) {
// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
exit( $status );
}
}