fix: openai api key optionality for chat playground

backend/app/api/v1/endpoints/chat.py

@@ -9,11 +9,26 @@
 from app import crud, schemas
 from app.api.deps import get_db, get_user
 from app.core.chat_service import chat_service
+from app.core.config import settings
 from app.core.logging import logger
 
 router = APIRouter()
 
 
+@router.get("/openai_key_set", response_model=bool)
+async def openai_key_set(
+    *,
+    db: AsyncSession = Depends(get_db),
+    user: schemas.User = Depends(get_user),
+) -> bool:
+    """Check if the OpenAI API key is set for the current user.
+
+    Returns:
+        bool: True if the OpenAI API key is set, False otherwise.
+    """
+    return settings.OPENAI_API_KEY is not None
+
+
 @router.post("/", response_model=schemas.Chat)
 async def create_chat(
     *,

backend/app/core/chat_service.py

@@ -50,11 +50,12 @@ class ChatService:
     def __init__(self):
         """Initialize the chat service with OpenAI client."""
         if not settings.OPENAI_API_KEY:
-            raise ValueError("OPENAI_API_KEY must be set in environment variables")
-
-        self.client = AsyncOpenAI(
-            api_key=settings.OPENAI_API_KEY,
-        )
+            logger.warning("OPENAI_API_KEY is not set in environment variables")
+            self.client = None
+        else:
+            self.client = AsyncOpenAI(
+                api_key=settings.OPENAI_API_KEY,
+            )
 
     async def generate_streaming_response(
         self,

backend/app/core/config.py

@@ -58,7 +58,7 @@ class Settings(BaseSettings):
     NATIVE_WEAVIATE_PORT: int = 8080
     NATIVE_WEAVIATE_GRPC_PORT: int = 50051
 
-    OPENAI_API_KEY: str
+    OPENAI_API_KEY: Optional[str] = None
 
     @field_validator("SQLALCHEMY_ASYNC_DATABASE_URI", mode="before")
     def assemble_db_connection(cls, v: Optional[str], info: ValidationInfo) -> PostgresDsn:

frontend/src/components/DashboardLayout.tsx

@@ -42,7 +42,7 @@ const DashboardLayout = () => {
       icon: LayoutDashboard,
     },
     {
-      name: "Chat",
+      name: "Chat playground",
       href: "/chat",
       icon: MessageSquare,
     },

frontend/src/pages/Chat.tsx

@@ -21,6 +21,7 @@ import { vscDarkPlus } from 'react-syntax-highlighter/dist/esm/styles/prism';
 import { CreateChatDialog } from "@/components/chat/CreateChatDialog";
 import { Spinner } from "@/components/ui/spinner";
 import { cn } from "@/lib/utils";
+import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogDescription } from "@/components/ui/dialog";
 
 interface Message {
   role: "user" | "assistant";
@@ -39,6 +40,7 @@ function Chat() {
   const navigate = useNavigate();
   const [chatInfo, setChatInfo] = useState<ChatInfo | null>(null);
   const [showCreateDialog, setShowCreateDialog] = useState(false);
+  const [isOpenAIKeySet, setIsOpenAIKeySet] = useState<boolean | null>(null);
 
   // If you're using a route param like /chat/:chatId
   const { chatId } = useParams<{ chatId: string }>();
@@ -306,6 +308,44 @@ function Chat() {
     }
   }, [location.state]);
 
+  // Add this effect at the top of other effects
+  useEffect(() => {
+    async function checkOpenAIKey() {
+      try {
+        const response = await apiClient.get('/chat/openai_key_set');
+        const isSet = await response.json();
+        setIsOpenAIKeySet(isSet);
+      } catch (error) {
+        console.error("Failed to check OpenAI key:", error);
+        setIsOpenAIKeySet(false);
+      }
+    }
+
+    void checkOpenAIKey();
+  }, []);
+
+  // Add this dialog component before the main return
+  if (isOpenAIKeySet === false) {
+    return (
+      <Dialog 
+        open={true} 
+        onOpenChange={() => navigate('/dashboard')}
+      >
+        <DialogContent onEscapeKeyDown={() => navigate('/dashboard')} onInteractOutside={() => navigate('/dashboard')}>
+          <DialogHeader>
+            <DialogTitle>OpenAI API key required</DialogTitle>
+            <DialogDescription>
+              Please add your OpenAI API key to the .env file to continue using the chat functionality. 
+              <br />
+              <br />  
+              Find the .env file in the root of the project and add the following: OPENAI_API_KEY=your_openai_api_key
+            </DialogDescription>
+          </DialogHeader>
+        </DialogContent>
+      </Dialog>
+    );
+  }
+
   return (
     <div className="flex h-full">
       <ChatSidebar onCreateChat={() => setShowCreateDialog(true)} />