更新若干功能

service/ai/factory.go

@@ -0,0 +1,49 @@
+package ai
+
+import "errors"
+
+// 支持的 Provider 标识。
+const (
+	ProviderSpark    = "spark"
+	ProviderDeepSeek = "deepseek"
+)
+
+// New 是 Provider 工厂：按标识与 API Key 创建对应实例。
+func New(provider, apiKey string) (Provider, error) {
+	switch provider {
+	case ProviderSpark:
+		return newSpark(apiKey)
+	case ProviderDeepSeek:
+		return newDeepSeek(apiKey)
+	default:
+		return nil, errors.New("AI_PROVIDER_INVALID")
+	}
+}
+
+// newSpark 创建讯飞星火 Lite（OpenAI 兼容 HTTP 端点，APIPassword 鉴权，Lite 免费）。
+func newSpark(apiPassword string) (Provider, error) {
+	if apiPassword == "" {
+		return nil, errors.New("AI_KEY_MISSING")
+	}
+	return &openAICompatible{
+		name:    ProviderSpark,
+		baseURL: "https://spark-api-open.xf-yun.com/v1",
+		model:   "lite",
+		apiKey:  apiPassword,
+		client:  newHTTPClient(),
+	}, nil
+}
+
+// newDeepSeek 创建 DeepSeek（OpenAI 兼容）。
+func newDeepSeek(apiKey string) (Provider, error) {
+	if apiKey == "" {
+		return nil, errors.New("AI_KEY_MISSING")
+	}
+	return &openAICompatible{
+		name:    ProviderDeepSeek,
+		baseURL: "https://api.deepseek.com",
+		model:   "deepseek-chat",
+		apiKey:  apiKey,
+		client:  newHTTPClient(),
+	}, nil
+}