class CensoredWordsValidator < ActiveModel::EachValidator def validate_each(record, attribute, value) if SiteSetting.censored_words.present? && (censored_words = censor_words(value, censored_words_regexp)).present? record.errors.add( attribute, :contains_censored_words, censored_words: join_censored_words(censored_words) ) elsif SiteSetting.censored_pattern.present? && (censored_words = censor_words(value, /#{SiteSetting.censored_pattern}/i)).present? record.errors.add( attribute, :matches_censored_pattern, censored_words: join_censored_words(censored_words) ) end end private def censor_words(value, regexp) censored_words = value.scan(regexp) censored_words.flatten! censored_words.compact! censored_words.map!(&:strip) censored_words.select!(&:present?) censored_words.uniq! censored_words end def join_censored_words(censored_words) censored_words.map!(&:downcase) censored_words.uniq! censored_words.join(", ".freeze) end def censored_words_regexp Regexp.new( '\b(' + SiteSetting.censored_words.split('|'.freeze).map! { |w| Regexp.escape(w) }.join('|'.freeze) + ')\b', true ) end end