From 30f4a32cc8db54449c922f7f69410241d6a9d710 Mon Sep 17 00:00:00 2001
From: Shulhan <ms@kilabit.info>
Date: Mon, 7 Nov 2022 14:35:56 +0700
Subject: all: implement type for Clearing callback

The ClearingCallbackResponse contains fields that must be set in order
to response from ClearingTransfer callback.
---
 clearing_callback.go | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 clearing_inquiry.go  |  6 ++--
 client.go            |  2 --
 3 files changed, 81 insertions(+), 5 deletions(-)
 create mode 100644 clearing_callback.go

diff --git a/clearing_callback.go b/clearing_callback.go
new file mode 100644
index 0000000..721ce25
--- /dev/null
+++ b/clearing_callback.go
@@ -0,0 +1,78 @@
+package duitku
+
+import (
+	"bytes"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+)
+
+// List of callback status code.
+const (
+	CallbackCodeSuccess = `00`
+	CallbackCodeFail    = `01`
+)
+
+// ClearingCallbackResponse contains fields that must be set in order to
+// response from ClearingTransfer callback.
+//
+// The signature created using the following formula:
+//
+//	SHA256(email + bankCode + bankAccount + accountName +
+//		custRefNumber + amountTransfer + disburseId + secretKey)
+type ClearingCallbackResponse struct {
+	AccountName   string `json:"accountName"`
+	BankAccount   string `json:"bankAccount"`
+	BankCode      string `json:"bankCode"`
+	CustRefNumber string `json:"custRefNumber"`
+	Email         string `json:"email"`
+
+	ErrorMsg   string `json:"errorMessage"`
+	StatusCode string `json:"statusCode"`
+	StatusDesc string `json:"statusDesc"`
+
+	Signature string `json:"signature"`
+
+	Amount     int64 `json:"amountTransfer"`
+	DisburseID int64 `json:"disburseId"`
+	UserID     int64 `json:"userId"`
+}
+
+// NewClearingCallbackResponse create ClearingCallbackResponse from
+// Clearing Transfer response.
+//
+// The StatusCode is set to success initially.
+func NewClearingCallbackResponse(transferRes ClearingTransferResponse) (cbres *ClearingCallbackResponse) {
+	cbres = &ClearingCallbackResponse{
+		AccountName:   transferRes.AccountName,
+		BankAccount:   transferRes.BankAccount,
+		BankCode:      transferRes.BankCode,
+		CustRefNumber: transferRes.CustRefNumber,
+
+		StatusCode: CallbackCodeSuccess,
+
+		Amount:     transferRes.Amount.Int64(),
+		DisburseID: transferRes.DisburseID,
+	}
+	return cbres
+}
+
+// Sign set the Signature SHA256 and convert to hex.
+func (cbres *ClearingCallbackResponse) Sign(opts ClientOptions) {
+	var (
+		bb        bytes.Buffer
+		plainHash [sha256.Size]byte
+	)
+
+	bb.WriteString(cbres.Email)
+	bb.WriteString(cbres.BankCode)
+	bb.WriteString(cbres.BankAccount)
+	bb.WriteString(cbres.AccountName)
+	bb.WriteString(cbres.CustRefNumber)
+	fmt.Fprintf(&bb, `%d%d`, cbres.Amount, cbres.DisburseID)
+	bb.WriteString(opts.ApiKey)
+
+	plainHash = sha256.Sum256(bb.Bytes())
+
+	cbres.Signature = hex.EncodeToString(plainHash[:])
+}
diff --git a/clearing_inquiry.go b/clearing_inquiry.go
index 8d3634e..5349272 100644
--- a/clearing_inquiry.go
+++ b/clearing_inquiry.go
@@ -12,10 +12,10 @@ import (
 //
 // For Signature it use the following formula:
 //
-// SHA256(email + timestamp + bankCode + type + bankAccount + amountTransfer
-// + purpose + apiKey).
+//	SHA256(email + timestamp + bankCode + type + bankAccount +
+//		amountTransfer + purpose + apiKey)
 //
-// [Clearing type]: // https://docs.duitku.com/disbursement/en/#clearing-inquiry-request
+// [Clearing type]: https://docs.duitku.com/disbursement/en/#clearing-inquiry-request
 type ClearingInquiry struct {
 	// 9 digits customer reference number.
 	CustRefNumber string `json:"custRefNumber"`
diff --git a/client.go b/client.go
index d4d4d9f..b62ef22 100644
--- a/client.go
+++ b/client.go
@@ -117,8 +117,6 @@ func (cl *Client) ClearingInquiry(req ClearingInquiry) (res *ClearingInquiryResp
 		return nil, fmt.Errorf(`%s: %s`, logp, httpRes.Status)
 	}
 
-	fmt.Printf(`%s: resBody: %s\n`, logp, resBody)
-
 	err = json.Unmarshal(resBody, &res)
 	if err != nil {
 		return nil, fmt.Errorf(`%s: %w`, logp, err)
-- 
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