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100 lines
2.3 KiB
100 lines
2.3 KiB
# frozen_string_literal: true
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# == Schema Information
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#
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# Table name: glitch_keyword_mutes
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#
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# id :integer not null, primary key
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# account_id :integer not null
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# keyword :string not null
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# whole_word :boolean default(TRUE), not null
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# created_at :datetime not null
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# updated_at :datetime not null
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#
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class Glitch::KeywordMute < ApplicationRecord
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belongs_to :account, required: true
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validates_presence_of :keyword
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after_commit :invalidate_cached_matchers
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def self.text_matcher_for(account_id)
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TextMatcher.new(account_id)
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end
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def self.tag_matcher_for(account_id)
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TagMatcher.new(account_id)
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end
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private
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def invalidate_cached_matchers
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Rails.cache.delete(TextMatcher.cache_key(account_id))
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Rails.cache.delete(TagMatcher.cache_key(account_id))
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end
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class RegexpMatcher
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attr_reader :account_id
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attr_reader :regex
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def initialize(account_id)
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@account_id = account_id
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regex_text = Rails.cache.fetch(self.class.cache_key(account_id)) { make_regex_text }
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@regex = /#{regex_text}/
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end
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protected
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def keywords
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Glitch::KeywordMute.where(account_id: account_id).pluck(:whole_word, :keyword)
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end
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def boundary_regex_for_keyword(keyword)
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sb = keyword =~ /\A[[:word:]]/ ? '\b' : ''
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eb = keyword =~ /[[:word:]]\Z/ ? '\b' : ''
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/(?mix:#{sb}#{Regexp.escape(keyword)}#{eb})/
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end
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end
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class TextMatcher < RegexpMatcher
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def self.cache_key(account_id)
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format('keyword_mutes:regex:text:%s', account_id)
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end
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def matches?(str)
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!!(regex =~ str)
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end
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private
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def make_regex_text
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kws = keywords.map! do |whole_word, keyword|
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whole_word ? boundary_regex_for_keyword(keyword) : /(?i:#{keyword})/
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end
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Regexp.union(kws).source
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end
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end
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class TagMatcher < RegexpMatcher
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def self.cache_key(account_id)
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format('keyword_mutes:regex:tag:%s', account_id)
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end
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def matches?(tags)
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tags.pluck(:name).any? { |n| regex =~ n }
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end
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private
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def make_regex_text
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kws = keywords.map! do |whole_word, keyword|
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term = (Tag::HASHTAG_RE =~ keyword) ? $1 : keyword
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whole_word ? boundary_regex_for_keyword(term) : term
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end
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Regexp.union(kws).source
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end
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end
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end
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