fix: replace workflow hardcoding chat model for knowledge recall (#233)

backend/application/internal/env.go

@@ -0,0 +1,108 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package internal
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"strconv"
+
+	ao "github.com/cloudwego/eino-ext/components/model/ark"
+	"github.com/cloudwego/eino-ext/components/model/deepseek"
+	"github.com/cloudwego/eino-ext/components/model/gemini"
+	"github.com/cloudwego/eino-ext/components/model/ollama"
+	mo "github.com/cloudwego/eino-ext/components/model/openai"
+	"github.com/cloudwego/eino-ext/components/model/qwen"
+	"github.com/coze-dev/coze-studio/backend/infra/contract/chatmodel"
+	"google.golang.org/genai"
+)
+
+func GetBuiltinChatModel(ctx context.Context, envPrefix string) (bcm chatmodel.BaseChatModel, configured bool, err error) {
+	getEnv := func(key string) string {
+		if val := os.Getenv(envPrefix + key); val != "" {
+			return val
+		}
+		return os.Getenv(key)
+	}
+
+	switch getEnv("BUILTIN_CM_TYPE") {
+	case "openai":
+		byAzure, _ := strconv.ParseBool(getEnv("BUILTIN_CM_OPENAI_BY_AZURE"))
+		bcm, err = mo.NewChatModel(ctx, &mo.ChatModelConfig{
+			APIKey:  getEnv("BUILTIN_CM_OPENAI_API_KEY"),
+			ByAzure: byAzure,
+			BaseURL: getEnv("BUILTIN_CM_OPENAI_BASE_URL"),
+			Model:   getEnv("BUILTIN_CM_OPENAI_MODEL"),
+		})
+	case "ark":
+		bcm, err = ao.NewChatModel(ctx, &ao.ChatModelConfig{
+			APIKey:  getEnv("BUILTIN_CM_ARK_API_KEY"),
+			Model:   getEnv("BUILTIN_CM_ARK_MODEL"),
+			BaseURL: getEnv("BUILTIN_CM_ARK_BASE_URL"),
+		})
+	case "deepseek":
+		bcm, err = deepseek.NewChatModel(ctx, &deepseek.ChatModelConfig{
+			APIKey:  getEnv("BUILTIN_CM_DEEPSEEK_API_KEY"),
+			BaseURL: getEnv("BUILTIN_CM_DEEPSEEK_BASE_URL"),
+			Model:   getEnv("BUILTIN_CM_DEEPSEEK_MODEL"),
+		})
+	case "ollama":
+		bcm, err = ollama.NewChatModel(ctx, &ollama.ChatModelConfig{
+			BaseURL: getEnv("BUILTIN_CM_OLLAMA_BASE_URL"),
+			Model:   getEnv("BUILTIN_CM_OLLAMA_MODEL"),
+		})
+	case "qwen":
+		bcm, err = qwen.NewChatModel(ctx, &qwen.ChatModelConfig{
+			APIKey:  getEnv("BUILTIN_CM_QWEN_API_KEY"),
+			BaseURL: getEnv("BUILTIN_CM_QWEN_BASE_URL"),
+			Model:   getEnv("BUILTIN_CM_QWEN_MODEL"),
+		})
+	case "gemini":
+		backend, convErr := strconv.ParseInt(getEnv("BUILTIN_CM_GEMINI_BACKEND"), 10, 64)
+		if convErr != nil {
+			return nil, false, convErr
+		}
+		c, clientErr := genai.NewClient(ctx, &genai.ClientConfig{
+			APIKey:   getEnv("BUILTIN_CM_GEMINI_API_KEY"),
+			Backend:  genai.Backend(backend),
+			Project:  getEnv("BUILTIN_CM_GEMINI_PROJECT"),
+			Location: getEnv("BUILTIN_CM_GEMINI_LOCATION"),
+			HTTPOptions: genai.HTTPOptions{
+				BaseURL: getEnv("BUILTIN_CM_GEMINI_BASE_URL"),
+			},
+		})
+		if clientErr != nil {
+			return nil, false, clientErr
+		}
+		bcm, err = gemini.NewChatModel(ctx, &gemini.Config{
+			Client: c,
+			Model:  getEnv("BUILTIN_CM_GEMINI_MODEL"),
+		})
+	default:
+		// accept builtin chat model not configured
+	}
+
+	if err != nil {
+		return nil, false, fmt.Errorf("knowledge init openai chat mode failed, %w", err)
+	}
+	if bcm != nil {
+		configured = true
+	}
+
+	return
+}