DROP FUNCTION IF EXISTS account.user_hasRole;

DELIMITER $$
CREATE DEFINER=`root`@`%` FUNCTION `account`.`user_hasRole`(vUserName VARCHAR(255), vRoleName VARCHAR(255)) RETURNS tinyint(1)
	DETERMINISTIC
BEGIN
/**
 * Checks if user has/inherits a role.
 *
 * @param vUserName The user name
 * @param vRoleName Role to check
 * @return %TRUE if it has role, %FALSE otherwise
 */
	DECLARE vHasRole BOOL DEFAULT FALSE;

	SELECT COUNT(*) > 0 INTO vHasRole
		FROM user u
			JOIN roleRole rr ON rr.role = u.role
			JOIN role r ON r.id = rr.inheritsFrom
		WHERE u.`name` = vUserName
			AND r.`name` = vRoleName COLLATE 'utf8_unicode_ci';

	RETURN vHasRole;
END$$
DELIMITER ;