discourse/lib/validators/reply_by_email_address_vali...

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Ruby
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class ReplyByEmailAddressValidator
def initialize(opts={})
@opts = opts
end
def valid_value?(val)
return true if val.blank?
!!(val =~ /@/i) &&
!!(val =~ /%{reply_key}/i) &&
val.gsub(/\+?%{reply_key}/i, "") != SiteSetting.notification_email
end
def error_message
I18n.t('site_settings.errors.invalid_reply_by_email_address')
end
end