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