feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

backend/infra/contract/chatmodel/protocol.go

@@ -0,0 +1,55 @@
+/*
+ * 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 chatmodel
+
+import "github.com/coze-dev/coze-studio/backend/api/model/ocean/cloud/developer_api"
+
+type Protocol string
+
+const (
+	ProtocolOpenAI   Protocol = "openai"
+	ProtocolClaude   Protocol = "claude"
+	ProtocolDeepseek Protocol = "deepseek"
+	ProtocolGemini   Protocol = "gemini"
+	ProtocolArk      Protocol = "ark"
+	ProtocolOllama   Protocol = "ollama"
+	ProtocolQwen     Protocol = "qwen"
+	ProtocolErnie    Protocol = "ernie"
+)
+
+func (p Protocol) TOModelClass() developer_api.ModelClass {
+	switch p {
+	case ProtocolArk:
+		return developer_api.ModelClass_SEED
+	case ProtocolOpenAI:
+		return developer_api.ModelClass_GPT
+	case ProtocolDeepseek:
+		return developer_api.ModelClass_DeekSeek
+	case ProtocolClaude:
+		return developer_api.ModelClass_Claude
+	case ProtocolGemini:
+		return developer_api.ModelClass_Gemini
+	case ProtocolOllama:
+		return developer_api.ModelClass_Llama
+	case ProtocolQwen:
+		return developer_api.ModelClass_QWen
+	case ProtocolErnie:
+		return developer_api.ModelClass_Ernie
+	default:
+		return developer_api.ModelClass_Other
+	}
+}