90 lines
2.2 KiB
Ruby
90 lines
2.2 KiB
Ruby
# frozen_string_literal: true
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# == Schema Information
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#
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# Table name: email_domain_blocks
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#
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# id :bigint(8) not null, primary key
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# domain :string default(""), not null
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# created_at :datetime not null
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# updated_at :datetime not null
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# parent_id :bigint(8)
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#
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class EmailDomainBlock < ApplicationRecord
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self.ignored_columns = %w(
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ips
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last_refresh_at
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)
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include DomainNormalizable
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belongs_to :parent, class_name: 'EmailDomainBlock', optional: true
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has_many :children, class_name: 'EmailDomainBlock', foreign_key: :parent_id, inverse_of: :parent, dependent: :destroy
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validates :domain, presence: true, uniqueness: true, domain: true
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# Used for adding multiple blocks at once
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attr_accessor :other_domains
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def to_log_human_identifier
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domain
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end
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def history
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@history ||= Trends::History.new('email_domain_blocks', id)
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end
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class Matcher
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def initialize(domain_or_domains, attempt_ip: nil)
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@uris = extract_uris(domain_or_domains)
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@attempt_ip = attempt_ip
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end
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def match?
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blocking? || invalid_uri?
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end
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private
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def invalid_uri?
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@uris.any?(&:nil?)
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end
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def blocking?
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blocks = EmailDomainBlock.where(domain: domains_with_variants).order(Arel.sql('char_length(domain) desc'))
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blocks.each { |block| block.history.add(@attempt_ip) } if @attempt_ip.present?
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blocks.any?
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end
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def domains_with_variants
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@uris.flat_map do |uri|
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next if uri.nil?
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segments = uri.normalized_host.split('.')
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segments.map.with_index { |_, i| segments[i..-1].join('.') }
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end
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end
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def extract_uris(domain_or_domains)
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Array(domain_or_domains).map do |str|
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domain = begin
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if str.include?('@')
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str.split('@', 2).last
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else
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str
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end
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end
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Addressable::URI.new.tap { |u| u.host = domain.strip } if domain.present?
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rescue Addressable::URI::InvalidURIError, IDN::Idna::IdnaError
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nil
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end
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end
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end
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def self.block?(domain_or_domains, attempt_ip: nil)
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Matcher.new(domain_or_domains, attempt_ip: attempt_ip).match?
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end
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end
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