Proposal for dynamic operations for Timber

gistfile1.txt

/**
	* Dynamic operations
	*/

	// All the valid operations
	static $registered_operations;

	// Convenience method to get the valid operations.
	// To register a valid operation, use the filter "timber/image/operations".
	public static function getOperations() {
		if (isset(self::$registered_operations) && is_array(self::$registered_operations)) {		return self::$registered_operations;
		}
		self::$registered_operations = apply_filters( 'timber/image/operations' , []);
		return self::$registered_operations;
	}

	// Magic method so you can call whatever method on this class.
	// If the called non-existing method is a valid operation, perform it.
	// If it is not, just return the source image.
	// This way, missing operations (plugins) are not breaking the theme too much.
	public static function __callStatic($name, $args) {
	    $registered_operations = self::getOperations();
	    if (in_array( $name, array_keys( $registered_operations ))) {
	    	$op = call_user_func_array($registered_operations[$name], $args);
	    	return self::_operate($args[0], $op, $force);
	    }
	    Helper::error_log('TimberImage does not support this operation: ', $name);
	    return $args[0];
  	}