feat: payment pay

services/payment/internal/channel/factory.go

@@ -0,0 +1,62 @@
+package channel
+
+import (
+	"fmt"
+	"sync"
+
+	pkgpay "lone-services/pkg/payment"
+	"lone-services/pkg/payment/alipay"
+	"lone-services/pkg/payment/bank"
+	wxchannel "lone-services/pkg/payment/wechat"
+	"lone-services/pkg/utils"
+	"lone-services/services/payment/internal/config"
+)
+
+var (
+	cacheMu sync.Mutex
+	cache   = map[string]pkgpay.Channel{}
+)
+
+func Get(channelCode, clientCode string) (pkgpay.Channel, error) {
+	if channelCode == utils.StringEmpty {
+		return nil, pkgpay.ErrUnsupportedChannel
+	}
+	if clientCode == utils.StringEmpty {
+		clientCode = pkgpay.ClientMiniProgram
+	}
+
+	cacheKey := channelCode + ":" + clientCode
+	cacheMu.Lock()
+	if ch, ok := cache[cacheKey]; ok {
+		cacheMu.Unlock()
+		return ch, nil
+	}
+	cacheMu.Unlock()
+
+	ch, err := newChannel(channelCode, clientCode)
+	if err != nil {
+		return nil, err
+	}
+
+	cacheMu.Lock()
+	cache[cacheKey] = ch
+	cacheMu.Unlock()
+	return ch, nil
+}
+
+func newChannel(channelCode, clientCode string) (pkgpay.Channel, error) {
+	switch channelCode {
+	case pkgpay.ChannelWechat:
+		cfg, err := config.NewWechatPayConfig(clientCode)
+		if err != nil {
+			return nil, err
+		}
+		return wxchannel.NewChannel(cfg)
+	case pkgpay.ChannelAlipay:
+		return alipay.NewChannel(), nil
+	case pkgpay.ChannelBank:
+		return bank.NewChannel(), nil
+	default:
+		return nil, fmt.Errorf("%w: %s", pkgpay.ErrUnsupportedChannel, channelCode)
+	}
+}