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checkout.go
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package ecpayaio
import (
"bytes"
"fmt"
"html/template"
"net/url"
"strconv"
"strings"
"time"
)
var tmpl = `<!DOCTYPE html>
<html>
<head>
</head>
<body>
<form id="apiFrom" action="{{.url}}" method="POST">
{{- range $key, $value := .payload}}
<input type="hidden" name="{{$key}}" value="{{$value}}" />
{{- end}}
</form>
<script type="text/javascript">
apiFrom.submit()
</script>
</body>
</html>`
type ChoosePayment string
var (
ChoosePaymentAll ChoosePayment = "ALL"
ChoosePaymentCredit ChoosePayment = "Credit"
ChoosePaymentWebATM ChoosePayment = "WebATM"
ChoosePaymentATM ChoosePayment = "ATM"
ChoosePaymentCVS ChoosePayment = "CVS"
ChoosePaymentBarcode ChoosePayment = "BARCODE"
)
type Language string
var (
LanguageZhTw Language = ""
LanguageEn Language = "ENG"
LanguageKr Language = "KOR"
LanguageJa Language = "JPN"
LanguageZhCn Language = "CHI"
)
// n. 收銀台
type Checkout struct {
payload map[string]string
hashKey string
hashIV string
host string
}
var (
HostStage = "https://payment-stage.ecpay.com.tw/Cashier/AioCheckOut/V5"
HostProduction = "https://payment.ecpay.com.tw/Cashier/AioCheckOut/V5"
)
func NewCheckout(host string) *Checkout {
ret := Checkout{
payload: map[string]string{
"PaymentType": "aio",
"MerchantTradeDate": time.Now().Format("2006/01/02 15:04:05"),
"DeviceSource": "",
"ChoosePayment": "ALL",
"EncryptType": "1",
},
host: host,
}
return &ret
}
func (c *Checkout) SetMerchantID(value string) {
c.payload["MerchantID"] = value
}
func (c *Checkout) SetMerchantTradeNo(value string) {
c.payload["MerchantTradeNo"] = value
}
func (c *Checkout) SetStoreID(value string) {
c.payload["StoreID"] = value
}
func (c *Checkout) SetMerchantTradeDate(value string) {
c.payload["MerchantTradeDate"] = value
}
func (c *Checkout) SetMerchantTradeDateByTime(t time.Time) {
c.payload["MerchantTradeDate"] = t.Format("2006/01/12 15:04:05")
}
// Fixed aio
// func (c *Checkout) SetPaymenrType(t *PaymentType) {
// c.payload["PaymentType"] = t.string
// }
// 結帳總額
func (c *Checkout) SetTotalAmount(value int) {
c.payload["TotalAmount"] = strconv.Itoa(value)
}
func (c *Checkout) SetTradeDesc(value string) {
c.payload["TradeDesc"] = urlencoded(value)
}
func (c *Checkout) SetItemName(values []string) {
c.payload["ItemName"] = strings.Join(values, "#")
}
func (c *Checkout) SetReturnURL(value string) {
c.payload["ReturnURL"] = value
}
func (c *Checkout) SetChoosePayment(value ChoosePayment) {
c.payload["ChoosePayment"] = string(value)
}
func (c *Checkout) SetClientBackURL(value string) {
c.payload["ClientBackURL"] = value
delete(c.payload, "OrderResultURL")
}
func (c *Checkout) SetItemURL(value string) {
c.payload["ItemURL"] = value
}
func (c *Checkout) SetRemark(value string) {
c.payload["Remark"] = value
}
func (c *Checkout) SetChooseSubPayment(value string) {
c.payload["ChooseSubPayment"] = value
}
func (c *Checkout) SetOrderResultURL(value string) {
c.payload["OrderResultURL"] = value
}
func (c *Checkout) SetNeedExtraPaidInfo(value bool) {
sv := "Y"
if !value {
sv = "N"
}
c.payload["NeedExtraPaidInfo"] = sv
}
func (c *Checkout) SetIgnorePayment(values []ChoosePayment) {
ss := []string{}
for _, it := range values {
ss = append(ss, string(it))
}
c.payload["IgnorePayment"] = strings.Join(ss, "#")
}
func (c *Checkout) SetPlatformID(value string) {
c.payload["PlatformID"] = value
}
func (c *Checkout) SetInvoiceMark(value bool) {
sv := "Y"
if !value {
sv = "N"
}
c.payload["InvoiceMark"] = sv
}
func (c *Checkout) SetCustomField1(value string) {
c.payload["CustomField1"] = value
}
func (c *Checkout) SetCustomField2(value string) {
c.payload["CustomField2"] = value
}
func (c *Checkout) SetCustomField3(value string) {
c.payload["CustomField3"] = value
}
func (c *Checkout) SetCustomField4(value string) {
c.payload["CustomField4"] = value
}
func (c *Checkout) SetLanguage(value Language) {
c.payload["Language"] = string(value)
}
// If Choosen Payment including ATM
func (c *Checkout) SetExpireDate(value int) {
c.payload["ExpireDate"] = strconv.Itoa(value)
}
func (c *Checkout) SetPaymentInfoURL(value string) {
c.payload["PaymentInfoURL"] = value
}
func (c *Checkout) SetClientRedirectURL(value string) {
c.payload["ClientRedirectURL"] = value
}
// If Choosen payment including credit
func (c *Checkout) SetBindingCard(bindingCard bool, merchantMemberID string) {
sv := "1"
if !bindingCard {
sv = "0"
}
c.payload["BindingCard"] = sv
c.payload["MerchantMemberID"] = merchantMemberID
}
func (c *Checkout) SetHashKey(value string) {
c.hashKey = value
}
func (c *Checkout) SetHashIV(value string) {
c.hashIV = value
}
func (c *Checkout) SetParameter(parameter string, value string) {
c.payload[parameter] = value
}
func (c *Checkout) String() string {
return fmt.Sprintln("%q", c.payload)
}
func (c *Checkout) GeneratePostForm() (string, error) {
// hashKey := "5294y06JbISpM5x9"
// hashIV := "v77hoKGq4kWxNNIS"
macValue := GenerateCheckMacValue(c.payload, c.hashKey, c.hashIV, EncryptTypeSHA256)
c.payload["CheckMacValue"] = macValue
t := template.New("t")
t, err := t.Parse(tmpl)
if err != nil {
// fmt.Println(err)
return "", err
}
ret := ""
w := bytes.NewBufferString(ret)
err = t.Execute(w, map[string]interface{}{
"payload": c.payload,
"url": c.host,
})
if err != nil {
fmt.Println(err)
return "", err
}
return w.String(), nil
}
func urlencoded(s string) string {
return url.QueryEscape(s)
}