feat: multi-pipeline support

main.py

@@ -1,4 +1,4 @@
-from fastapi import FastAPI, Request, Depends, status
+from fastapi import FastAPI, Request, Depends, status, HTTPException
 from fastapi.middleware.cors import CORSMiddleware
 
 from starlette.responses import StreamingResponse, Response
@@ -14,20 +14,50 @@ from utils import get_last_user_message, stream_message_template
 from schemas import OpenAIChatCompletionForm
 from config import MODEL_ID, MODEL_NAME
 
-from pipelines.pipeline import (
-    get_response,
-    on_startup,
-    on_shutdown,
-)
+import os
+import importlib.util
+
+
+PIPELINES = {}
+
+
+def load_modules_from_directory(directory):
+    for filename in os.listdir(directory):
+        if filename.endswith(".py"):
+            module_name = filename[:-3]  # Remove the .py extension
+            module_path = os.path.join(directory, filename)
+            spec = importlib.util.spec_from_file_location(module_name, module_path)
+            module = importlib.util.module_from_spec(spec)
+            spec.loader.exec_module(module)
+            yield module
+
+
+for loaded_module in load_modules_from_directory("./pipelines"):
+    # Do something with the loaded module
+    print("Loaded:", loaded_module.__name__)
+    PIPELINES[loaded_module.__name__] = {
+        "module": loaded_module,
+        "id": loaded_module.__name__,
+        "name": loaded_module.__name__,
+    }
+
 
 from contextlib import asynccontextmanager
 
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
-    await on_startup()
+    for pipeline in PIPELINES.values():
+        if hasattr(pipeline["module"], "on_startup"):
+            info = await pipeline["module"].on_startup()
+            if info:
+                pipeline["id"] = info["id"]
+                pipeline["name"] = info["name"]
     yield
-    await on_shutdown()
+
+    for pipeline in PIPELINES.values():
+        if hasattr(pipeline["module"], "on_shutdown"):
+            await pipeline["module"].on_shutdown()
 
 
 app = FastAPI(docs_url="/docs", redoc_url=None, lifespan=lifespan)
@@ -59,17 +89,18 @@ async def check_url(request: Request, call_next):
 @app.get("/v1/models")
 async def get_models():
     """
-    Returns the model that is available inside Dialog in the OpenAI format.
+    Returns the available pipelines
     """
     return {
         "data": [
             {
-                "id": MODEL_ID,
-                "name": MODEL_NAME,
+                "id": pipeline["id"],
+                "name": pipeline["name"],
                 "object": "model",
                 "created": int(time.time()),
                 "owned_by": "openai",
             }
+            for pipeline in PIPELINES.values()
         ]
     }
 
@@ -79,9 +110,18 @@ async def get_models():
 async def generate_openai_chat_completion(form_data: OpenAIChatCompletionForm):
     user_message = get_last_user_message(form_data.messages)
 
+    if form_data.model not in PIPELINES:
+        return HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"Model {form_data.model} not found",
+        )
+
+    get_response = PIPELINES[form_data.model]["module"].get_response
+
     if form_data.stream:
 
         def stream_content():
+
             res = get_response(user_message, messages=form_data.messages)
 
             if isinstance(res, str):
@@ -108,9 +148,7 @@ async def generate_openai_chat_completion(form_data: OpenAIChatCompletionForm):
 
         return StreamingResponse(stream_content(), media_type="text/event-stream")
     else:
-
         res = get_response(user_message, messages=form_data.messages)
-
         message = ""
 
         if isinstance(res, str):

pipelines/examples/pipeline.py

@@ -0,0 +1,29 @@
+from typing import List, Union, Generator
+from schemas import OpenAIChatMessage
+
+
+def get_response(
+    user_message: str, messages: List[OpenAIChatMessage]
+) -> Union[str, Generator]:
+    # This is where you can add your custom pipelines like RAG.
+
+    print(messages)
+    print(user_message)
+
+    return f"pipeline response to: {user_message}"
+
+
+async def on_startup():
+    # This function is called when the server is started.
+    print(f"on_startup:{__name__}")
+
+    # Optional: return pipeline metadata
+    # return {
+    #     "id": "pipeline_id",
+    #     "name": "pipeline_name",
+    # }
+
+
+async def on_shutdown():
+    # This function is called when the server is stopped.
+    pass

pipelines/pipeline.py

@@ -10,11 +10,14 @@ def get_response(
     print(messages)
     print(user_message)
 
-    return f"rag response to: {user_message}"
+    return f"pipeline response to: {user_message}"
 
 
 async def on_startup():
     # This function is called when the server is started.
+    print("onstartup")
+    print(__name__)
+
     pass