discourse/app/services/word_watcher.rb

67 lines
1.7 KiB
Ruby

# frozen_string_literal: true
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)
if words.empty?
nil
else
regexp = '(' + words.map { |w| word_to_regexp(w) }.join('|'.freeze) + ')'
SiteSetting.watched_words_regular_expressions? ? regexp : "(?<!\\w)(#{regexp})(?!\\w)"
end
end
s.present? ? Regexp.new(s, Regexp::IGNORECASE) : nil
end
def self.word_to_regexp(word)
if SiteSetting.watched_words_regular_expressions?
# Strip ruby regexp format if present, we're going to make the whole thing
# case insensitive anyway
return word.start_with?("(?-mix:") ? word[7..-2] : word
end
Regexp.escape(word).gsub("\\*", '\S*')
end
def self.word_matcher_regexp_key(action)
"watched-words-regexp:#{action}"
end
def self.clear_cache!
WatchedWord.actions.each 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