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payment.go
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payment.go
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package finserv
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"github.com/sirupsen/logrus"
"golang.org/x/net/context/ctxhttp"
)
// ConfirmPaymentResult is a result after capture a transaction
type ConfirmPaymentResult struct {
err error
pgpToken string
referenceNumber string
fastTime string
}
// NewConfirmPaymentResult is a constructor for doing test
func NewConfirmPaymentResult(pgpToken string, referenceNumber string, fastTime string, err error) *ConfirmPaymentResult {
return &ConfirmPaymentResult{
pgpToken: pgpToken,
referenceNumber: referenceNumber,
fastTime: fastTime,
err: err,
}
}
// Err return error
func (cpr *ConfirmPaymentResult) Err() error {
return cpr.err
}
// PGPToken will return transaction id and error
func (cpr *ConfirmPaymentResult) PGPToken() string {
return cpr.pgpToken
}
// ReferenceNumber will return transaction id and error
func (cpr *ConfirmPaymentResult) ReferenceNumber() string {
return cpr.referenceNumber
}
// FastTime will return transaction id and error
func (cpr *ConfirmPaymentResult) FastTime() string {
return cpr.fastTime
}
type paymentClient struct {
client *http.Client
host string
secret string
logger *logrus.Logger
}
// NewPaymentClient is a constructor
func NewPaymentClient(httpClient *http.Client, host, secret string, logger *logrus.Logger) PaymentClient {
if logger == nil {
logger = logrus.New()
}
return &paymentClient{
client: httpClient,
host: host,
secret: secret,
logger: logger,
}
}
func (pc *paymentClient) logResponse(res *http.Response) {
defer res.Body.Close()
resBody, _ := ioutil.ReadAll(res.Body)
resMap := map[string]interface{}{
"message": string(resBody),
}
pc.logger.Error(resMap)
return
}
func (pc *paymentClient) do(ctx context.Context, resultChan chan<- *ConfirmPaymentResult, client *http.Client, req *http.Request) {
defer close(resultChan)
res, err := ctxhttp.Do(ctx, client, req)
result := new(ConfirmPaymentResult)
if err != nil {
if err == context.DeadlineExceeded {
result.err = ErrTimeout
resultChan <- result
return
}
result.err = ErrClient
resultChan <- result
return
}
if res.StatusCode != http.StatusOK {
if res.StatusCode == http.StatusUnauthorized {
pc.logResponse(res)
result.err = ErrUnauthorized
resultChan <- result
return
}
if res.StatusCode == http.StatusUnprocessableEntity {
pc.logResponse(res)
result.err = ErrInvalidParameter
resultChan <- result
return
}
if res.StatusCode == http.StatusNotFound {
pc.logResponse(res)
result.err = ErrTransactionNotFound
resultChan <- result
return
}
pc.logResponse(res)
result.err = ErrInternalServer
resultChan <- result
return
}
defer res.Body.Close()
resBody, _ := ioutil.ReadAll(res.Body)
var e paymentEnvlope
if err := json.Unmarshal(resBody, &e); err != nil {
result.err = ErrInternalServer
resultChan <- result
return
}
successData := make(map[string]string, 0)
json.Unmarshal(e.Data, &successData)
result.pgpToken = successData["pgpToken"]
result.referenceNumber = successData["refNum"]
result.fastTime = successData["fastTime"]
resultChan <- result
return
}
// ConfirmForWebCheckout is a function to confirm payment for web checkout.
func (pc *paymentClient) ConfirmForWebCheckout(ctx context.Context, pp *PaymentProperty) *ConfirmPaymentResult {
resultChan := make(chan *ConfirmPaymentResult)
url := fmt.Sprintf("%s%s", pc.host, confirmPaymentPath)
ppByte, _ := json.Marshal(pp)
fmt.Println(string(ppByte))
req, _ := http.NewRequest(http.MethodPost, url, bytes.NewReader(ppByte))
req.Header.Add("Content-Type", "application/json")
req.Header.Add("Authorization", pc.secret)
go pc.do(ctx, resultChan, pc.client, req)
result := <-resultChan
return result
}