Enha: add openrouter parser

llmapi/parser.go

@@ -88,3 +88,40 @@ func (p *lcpRespParser) ParseBytes(body []byte) (map[string]any, error) {
 	}
 	return respMap, nil
 }
+
+type openRouterParser struct {
+	log *slog.Logger
+}
+
+func NewOpenRouterParser(log *slog.Logger) *openRouterParser {
+	return &openRouterParser{log: log}
+}
+
+func (p *openRouterParser) ParseBytes(body []byte) (map[string]any, error) {
+	// parsing logic here
+	resp := OpenRouterResp{}
+	if err := json.Unmarshal(body, &resp); err != nil {
+		p.log.Error("failed to unmarshal", "error", err)
+		return nil, err
+	}
+	if len(resp.Choices) == 0 {
+		p.log.Error("empty choices", "resp", resp)
+		err := errors.New("empty choices in resp")
+		return nil, err
+	}
+	text := resp.Choices[0].Message.Content
+	li := strings.Index(text, "{")
+	ri := strings.LastIndex(text, "}")
+	if li < 0 || ri < 1 {
+		p.log.Error("not a json", "msg", text)
+		err := fmt.Errorf("fn: ParseBytes, not a json; data: %s", text)
+		return nil, err
+	}
+	sj := text[li : ri+1]
+	respMap := make(map[string]any)
+	if err := json.Unmarshal([]byte(sj), &respMap); err != nil {
+		p.log.Error("failed to unmarshal response", "error", err, "string-json", sj)
+		return nil, err
+	}
+	return respMap, nil
+}