45 lines
856 B
Ruby
45 lines
856 B
Ruby
# frozen_string_literal: true
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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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# without @:
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*%w[
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.con
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.coom
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],
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# with @:
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*%w[
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fmail.com
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gemail.com
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gmail.co
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gmaile.com
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gmaill.com
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icluod.com
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proton.mail
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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[attribute] << "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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return false if value.split('@', 2).last.count('.') == 0
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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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