class WordWatcher def initialize(raw) @raw = raw end def self.words_for_action(action) WatchedWord.where(action: WatchedWord.actions[action.to_sym]).limit(1000).pluck(:word) end def self.words_for_action_exists?(action) WatchedWord.where(action: WatchedWord.actions[action.to_sym]).exists? end def self.word_matcher_regexp(action) s = Discourse.cache.fetch(word_matcher_regexp_key(action), expires_in: 1.day) do words = words_for_action(action) words.empty? ? nil : '\b(' + words.map { |w| word_to_regexp(w) }.join('|'.freeze) + ')\b' end s.present? ? Regexp.new(s, Regexp::IGNORECASE) : nil end def self.word_to_regexp(word) return word if SiteSetting.watched_words_regular_expressions? Regexp.escape(word).gsub("\\*", '\S*') end def self.word_matcher_regexp_key(action) "watched-words-regexp:#{action}" end def self.clear_cache! WatchedWord.actions.sum do |a, i| Discourse.cache.delete word_matcher_regexp_key(a) end end def requires_approval? word_matches_for_action?(:require_approval) end def should_flag? word_matches_for_action?(:flag) end def should_block? word_matches_for_action?(:block) end def word_matches_for_action?(action) r = self.class.word_matcher_regexp(action) r ? r.match(@raw) : false end end