draft

backend/internal/channel/factory.go

@@ -0,0 +1,65 @@
+package channel
+
+import (
+	"errors"
+	"sync"
+
+	"pay-bridge/internal/model"
+)
+
+var (
+	ErrChannelNotFound = errors.New("channel not found")
+	ErrNotSupported    = errors.New("operation not supported by this channel")
+)
+
+var globalRegistry = &Registry{}
+
+// Registry 渠道注册表
+type Registry struct {
+	mu        sync.RWMutex
+	factories map[string]ChannelFactory
+}
+
+// Register 注册渠道工厂（供各渠道包在 init() 中调用）
+func Register(channelCode string, factory ChannelFactory) {
+	globalRegistry.Register(channelCode, factory)
+}
+
+func (r *Registry) Register(channelCode string, factory ChannelFactory) {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	if r.factories == nil {
+		r.factories = make(map[string]ChannelFactory)
+	}
+	r.factories[channelCode] = factory
+}
+
+// Get 根据渠道码、商户配置和网关地址获取渠道实例
+func Get(channelCode string, config *model.ChannelConfig, urls URLs) (PaymentChannel, error) {
+	return globalRegistry.Get(channelCode, config, urls)
+}
+
+func (r *Registry) Get(channelCode string, config *model.ChannelConfig, urls URLs) (PaymentChannel, error) {
+	r.mu.RLock()
+	factory, ok := r.factories[channelCode]
+	r.mu.RUnlock()
+	if !ok {
+		return nil, ErrChannelNotFound
+	}
+	return factory(config, urls), nil
+}
+
+// List 列出已注册的渠道码
+func List() []string {
+	return globalRegistry.List()
+}
+
+func (r *Registry) List() []string {
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+	codes := make([]string, 0, len(r.factories))
+	for code := range r.factories {
+		codes = append(codes, code)
+	}
+	return codes
+}