module RegexHelper # user https://rubular.com/ to quickly validate your regex # the following regext needs atleast one character which should be # valid unicode letter, unicode number, underscore, hyphen # shouldn't start with a underscore or hyphen UNICODE_CHARACTER_NUMBER_HYPHEN_UNDERSCORE = Regexp.new('\A[\p{L}\p{N}]+[\p{L}\p{N}_-]+\Z') MENTION_REGEX = Regexp.new('\[(@[\w_. ]+)\]\(mention://(?:user|team)/\d+/(.*?)+\)') end