Merge pull request #331 from moov-io/Support-acknowledgment-entries--…

…-ACK-&-ATX-#327

Support acknowledgment entries   ack & atx #327

README.md

@@ -15,7 +15,9 @@ Docs: [docs.moov.io](https://docs.moov.io/en/latest/) | [api docs](https://api.m
 ACH is under active development but already in production for multiple companies. Please star the project if you are interested in its progress.
 
 * Library currently supports the reading and writing
+	* ACK (Acknowledgment Entry for CCD)
 	* ARC (Accounts Receivable Entry)
+	* ATX (Acknowledgment Entry for CTX)
 	* BOC (Back Office Conversion)
 	* CCD (Corporate credit or debit)
 	* CIE (Customer-Initiated Entry)

batch.go

@@ -27,8 +27,12 @@ type batch struct {
 // NewBatch takes a BatchHeader and returns a matching SEC code batch type that is a batcher. Returns an error if the SEC code is not supported.
 func NewBatch(bh *BatchHeader) (Batcher, error) {
 	switch bh.StandardEntryClassCode {
+	case "ACK":
+		return NewBatchACK(bh), nil
 	case "ARC":
 		return NewBatchARC(bh), nil
+	case "ATX":
+		return NewBatchATX(bh), nil
 	case "BOC":
 		return NewBatchBOC(bh), nil
 	case "CCD":

batchACK.go

@@ -0,0 +1,84 @@
+// Copyright 2018 The Moov Authors
+// Use of this source code is governed by an Apache License
+// license that can be found in the LICENSE file.
+
+package ach
+
+import (
+	"fmt"
+)
+
+// BatchACK is a batch file that handles SEC payment type ACK and ACK+.
+// Acknowledgement of a Corporate credit by the Receiving Depository Financial Institution (RDFI).
+// For commercial accounts only.
+type BatchACK struct {
+	batch
+}
+
+// NewBatchACK returns a *BatchACK
+func NewBatchACK(bh *BatchHeader) *BatchACK {
+	batch := new(BatchACK)
+	batch.SetControl(NewBatchControl())
+	batch.SetHeader(bh)
+	return batch
+}
+
+// Validate ensures the batch meets NACHA rules specific to this batch type.
+func (batch *BatchACK) Validate() error {
+	// basic verification of the batch before we validate specific rules.
+	if err := batch.verify(); err != nil {
+		return err
+	}
+	// Add configuration and type specific validation.
+	if batch.Header.StandardEntryClassCode != "ACK" {
+		msg := fmt.Sprintf(msgBatchSECType, batch.Header.StandardEntryClassCode, "ACK")
+		return &BatchError{BatchNumber: batch.Header.BatchNumber, FieldName: "StandardEntryClassCode", Msg: msg}
+	}
+	// Range through Entries
+	for _, entry := range batch.Entries {
+		// Amount must be zero for Acknowledgement Entries
+		if entry.Amount > 0 {
+			msg := fmt.Sprintf(msgBatchAmountZero, entry.Amount, "ACK")
+			return &BatchError{BatchNumber: batch.Header.BatchNumber, FieldName: "Amount", Msg: msg}
+		}
+		// TransactionCode must be either 24 or 34 for Acknowledgement Entries
+		switch entry.TransactionCode {
+		case 24, 34:
+		default:
+			msg := fmt.Sprintf(msgBatchTransactionCode, entry.TransactionCode, "ACK")
+			return &BatchError{BatchNumber: batch.Header.BatchNumber, FieldName: "TransactionCode", Msg: msg}
+		}
+
+		// ACK can have up to one Record TypeCode = 05, or there can be a NOC (98) or Return (99)
+		for _, addenda := range entry.Addendum {
+			switch entry.Category {
+			case CategoryForward:
+				if err := batch.categoryForwardAddenda05(entry, addenda); err != nil {
+					return err
+				}
+				if len(entry.Addendum) > 1 {
+					msg := fmt.Sprintf(msgBatchAddendaCount, len(entry.Addendum), 1, batch.Header.StandardEntryClassCode)
+					return &BatchError{BatchNumber: batch.Header.BatchNumber, FieldName: "AddendaCount", Msg: msg}
+				}
+			case CategoryNOC:
+				if err := batch.categoryNOCAddenda98(entry, addenda); err != nil {
+					return err
+				}
+			case CategoryReturn:
+				if err := batch.categoryReturnAddenda99(entry, addenda); err != nil {
+					return err
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// Create builds the batch sequence numbers and batch control. Additional creation
+func (batch *BatchACK) Create() error {
+	// generates sequence numbers and batch control
+	if err := batch.build(); err != nil {
+		return err
+	}
+	return batch.Validate()
+}