67 lines
1.6 KiB
Ruby
67 lines
1.6 KiB
Ruby
# frozen_string_literal: true
|
|
# == Schema Information
|
|
#
|
|
# Table name: glitch_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 Glitch::KeywordMute < ApplicationRecord
|
|
belongs_to :account, required: true
|
|
|
|
validates_presence_of :keyword
|
|
|
|
after_commit :invalidate_cached_matcher
|
|
|
|
def self.matcher_for(account_id)
|
|
Matcher.new(account_id)
|
|
end
|
|
|
|
private
|
|
|
|
def invalidate_cached_matcher
|
|
Rails.cache.delete("keyword_mutes:regex:#{account_id}")
|
|
end
|
|
|
|
class Matcher
|
|
attr_reader :account_id
|
|
attr_reader :regex
|
|
|
|
def initialize(account_id)
|
|
@account_id = account_id
|
|
regex_text = Rails.cache.fetch("keyword_mutes:regex:#{account_id}") { regex_text_for_account }
|
|
@regex = /#{regex_text}/
|
|
end
|
|
|
|
def =~(str)
|
|
regex =~ str
|
|
end
|
|
|
|
private
|
|
|
|
def keywords
|
|
Glitch::KeywordMute.where(account_id: account_id).select(:keyword, :id, :whole_word)
|
|
end
|
|
|
|
def regex_text_for_account
|
|
kws = keywords.find_each.with_object([]) do |kw, a|
|
|
a << (kw.whole_word ? boundary_regex_for_keyword(kw.keyword) : kw.keyword)
|
|
end
|
|
|
|
Regexp.union(kws).source
|
|
end
|
|
|
|
def boundary_regex_for_keyword(keyword)
|
|
sb = keyword =~ /\A[[:word:]]/ ? '\b' : ''
|
|
eb = keyword =~ /[[:word:]]\Z/ ? '\b' : ''
|
|
|
|
/(?mix:#{sb}#{Regexp.escape(keyword)}#{eb})/
|
|
end
|
|
end
|
|
end
|