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Only cache the regex text, not the regex itself.
It is possible to cache a Regexp object, but I'm not sure what happens if e.g. that object remains in cache across two different Ruby versions. Caching a string seems to raise fewer questions.
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@ -34,23 +34,20 @@ class Glitch::KeywordMute < ApplicationRecord
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def initialize(account_id)
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@account_id = account_id
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@regex = Rails.cache.fetch("keyword_mutes:regex:#{account_id}") { regex_for_account }
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regex_text = Rails.cache.fetch("keyword_mutes:regex:#{account_id}") { regex_text_for_account }
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@regex = /#{regex_text}/i unless regex_text.empty?
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end
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def keywords
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Glitch::KeywordMute.
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where(account_id: account_id).
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select(:keyword, :id, :whole_word)
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Glitch::KeywordMute.where(account_id: account_id).select(:keyword, :id, :whole_word)
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end
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def regex_for_account
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re_text = [].tap do |arr|
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def regex_text_for_account
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[].tap do |arr|
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keywords.find_each do |kw|
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arr << (kw.whole_word ? boundary_regex_for_keyword(kw.keyword) : Regexp.escape(kw.keyword))
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end
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end.join('|')
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/#{re_text}/i unless re_text.empty?
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end
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def boundary_regex_for_keyword(keyword)
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