a4851100fd
It would also have been valid to get rid of the attr_reader, but I like being able to reach inside KeywordMute::Matcher without resorting to instance_variable_get tomfoolery.
44 lines
1 KiB
Ruby
44 lines
1 KiB
Ruby
# frozen_string_literal: true
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# == Schema Information
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#
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# Table name: 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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# created_at :datetime not null
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# updated_at :datetime not null
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#
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class KeywordMute < ApplicationRecord
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belongs_to :account, required: true
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validates_presence_of :keyword
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def self.matcher_for(account)
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Rails.cache.fetch("keyword_mutes:matcher:#{account}") { Matcher.new(account) }
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end
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class Matcher
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attr_reader :regex
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def initialize(account)
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re = String.new.tap do |str|
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scoped = KeywordMute.where(account: account)
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keywords = scoped.select(:id, :keyword)
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count = scoped.count
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keywords.find_each.with_index do |kw, index|
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str << Regexp.escape(kw.keyword.strip)
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str << '|' if index < count - 1
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end
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end
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@regex = /\b(?:#{re})\b/i unless re.empty?
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end
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def =~(str)
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regex ? regex =~ str : false
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end
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end
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end
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