Better Braintree errors for Rails

braintree_helper.rb

module BraintreeHelper
  SUCCESS_STATUSES = [
    Braintree::Transaction::Status::Authorizing,
    Braintree::Transaction::Status::Authorized,
    Braintree::Transaction::Status::Settled,
    Braintree::Transaction::Status::SettlementConfirmed,
    Braintree::Transaction::Status::SettlementPending,
    Braintree::Transaction::Status::Settling,
    Braintree::Transaction::Status::SubmittedForSettlement,
  ]

  def braintree_errors(result)
    errors = []

    verification = result.credit_card_verification
    if verification
      status = verification.status

      if status == "processor_declined"
        e = "Processor Declined: "
        e += "(#{verification.processor_response_code}) "
        e += verification.processor_response_text

        errors << e
      end

      if status == "gateway_rejected"
        e = "Gateway Rejected: "
        
        reason = verification.gateway_rejection_reason
        if reason == "avs" or reason == "cvv"
          e += reason.upcase
        else
          e += reason.titleize
        end

        errors << e
      end
    end

    transaction = result.transaction
    if transaction and !SUCCESS_STATUSES.include? transaction.status
      e = transaction.status.titleize

      errors << e
    end
    
    if result.errors.size > 0
      result.errors.each do |error|
        e = "(#{error.code}) "
        e += error.message

        errors << e
      end
    end

    errors
  end
end