63 lines
1.2 KiB
Ruby
63 lines
1.2 KiB
Ruby
# frozen_string_literal: true
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require "tldv"
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class TypoedEmailValidator < ActiveModel::EachValidator
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# this array contains "forbidden" email address endings
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INVALID_ENDINGS = [
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# with @:
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*%w[
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fmail.com
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gail.com
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gamil.com
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gemail.com
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gmaik.com
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gmail.cm
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gmail.co
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gmail.co.uk
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gmail.om
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gmaile.com
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gmaill.com
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gmali.com
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gnail.com
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hotamil.com
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hotmai.com
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hotmaill.com
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iclooud.com
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iclould.com
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icluod.com
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protonail.com
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xn--gmail-xk1c.com
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yahooo.com
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☺gmail.com
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].map { "@#{_1}" }
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].freeze
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def validate_each(record, attribute, value)
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return if valid?(value)
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record.errors.add(attribute, :typo, message: "contains a typo")
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end
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private
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def valid?(value)
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# needs an @
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return false unless value.include?("@")
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# part after the @ needs to have at least one period
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_prefix, domain = value.split("@", 2)
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domain_parts = domain.split(".")
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return false if domain_parts.length == 1
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# check if the TLD is valid
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tld = domain_parts.last
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return false unless TLDv.valid?(tld)
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# finally, common typos
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return false if INVALID_ENDINGS.any? { value.end_with?(_1) }
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true
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end
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end
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