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# frozen_string_literal: true
# == Schema Information
#
# Table name: keyword_mutes
#
# id :integer not null, primary key
# account_id :integer not null
# keyword :string not null
# whole_word :boolean default(TRUE), not null
# created_at :datetime not null
# updated_at :datetime not null
#
class KeywordMute < ApplicationRecord
belongs_to :account, required: true
validates_presence_of :keyword
after_commit :invalidate_cached_matcher
def self.matcher_for(account_id)
Rails.cache.fetch("keyword_mutes:matcher:#{account_id}") { Matcher.new(account_id) }
end
private
def invalidate_cached_matcher
Rails.cache.delete("keyword_mutes:matcher:#{account_id}")
end
class Matcher
attr_reader :regex
def initialize(account_id)
re = [].tap do |arr|
KeywordMute.where(account_id: account_id).select(:keyword, :id, :whole_word).find_each do |m|
boundary = m.whole_word ? '\b' : ''
arr << "#{boundary}#{Regexp.escape(m.keyword.strip)}#{boundary}"
end
end.join('|')
@regex = /#{re}/i unless re.empty?
end
def =~(str)
regex ? regex =~ str : false
end
end
end
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