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# frozen_string_literal: true
module ServiceDesk
module CustomEmailVerifications
class UpdateService < BaseService
EMAIL_TOKEN_REGEXP = /Verification token: ([A-Za-z0-9_-]{12})/
def execute
return error_feature_flag_disabled unless Feature.enabled?(:service_desk_custom_email, project)
return error_parameter_missing if settings.blank? || verification.blank?
return error_already_finished if already_finished_and_no_mail?
return error_already_failed if already_failed_and_no_mail?
verification_error = verify
settings.update!(custom_email_enabled: false) if settings.custom_email_enabled?
notify_project_owners_and_user_about_result(user: verification.triggerer)
if verification_error.present?
verification.mark_as_failed!(verification_error)
error_not_verified(verification_error)
else
verification.mark_as_finished!
log_info
ServiceResponse.success
end
end
private
def mail
params[:mail]
end
def verification
@verification ||= settings.custom_email_verification
end
def already_finished_and_no_mail?
verification.finished? && mail.blank?
end
def already_failed_and_no_mail?
verification.failed? && mail.blank?
end
def verify
return :mail_not_received_within_timeframe if mail_not_received_within_timeframe?
return :incorrect_from if incorrect_from?
return :incorrect_token if incorrect_token?
nil
end
def mail_not_received_within_timeframe?
# (For completeness) also raise if no email provided
mail.blank? || !verification.in_timeframe?
end
def incorrect_from?
# Does the email forwarder preserve the FROM header?
mail.from.first != settings.custom_email
end
def incorrect_token?
message, _stripped_text = Gitlab::Email::ReplyParser.new(mail).execute
scan_result = message.scan(EMAIL_TOKEN_REGEXP)
return true if scan_result.empty?
scan_result.first.first != verification.token
end
def error_parameter_missing
error_response(s_('ServiceDesk|Service Desk setting or verification object missing'))
end
def error_already_finished
error_response(s_('ServiceDesk|Custom email address has already been verified.'))
end
def error_already_failed
error_response(s_('ServiceDesk|Custom email address verification has already been processed and failed.'))
end
end
end
end
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