404 페이지, 존재하지 않는 스페이스 페이지 핸들링

packages/frontend/src/App.tsx

@@ -3,6 +3,7 @@ import { BrowserRouter, Route, Routes } from "react-router-dom";
 import "./App.css";
 import Editor from "./components/note/Editor.tsx";
 import Home from "./pages/Home.tsx";
+import NotFoundPage from "./pages/NotFound.tsx";
 import SpacePage from "./pages/Space.tsx";
 
 function App() {
@@ -12,6 +13,7 @@ function App() {
         <Route path="/" element={<Home />} />
         <Route path="/space/:spaceId" element={<SpacePage />} />
         <Route path="/note/:noteId" element={<Editor />} />
+        <Route path="*" element={<NotFoundPage />} />
       </Routes>
     </BrowserRouter>
   );

packages/frontend/src/components/ErrorSection.tsx

@@ -0,0 +1,29 @@
+import { ReactNode } from "react";
+
+import buzzyLogo from "@/assets/error-logo.svg";
+
+type ErrorSectionProps = {
+  description: string;
+  RestoreActions?: () => ReactNode;
+};
+
+export default function ErrorSection({
+  description,
+  RestoreActions,
+}: ErrorSectionProps) {
+  return (
+    <div className="container mx-auto px-6 h-full text-center">
+      <div className="flex flex-col w-full h-full justify-center items-center">
+        <img src={buzzyLogo} className="w-36" />
+        <div className="mt-8 text-base">
+          <p>{description}</p>
+        </div>
+        {RestoreActions && (
+          <div className="mt-12">
+            <RestoreActions />
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}

packages/frontend/src/components/space/SpaceView.tsx

@@ -296,7 +296,8 @@ export default function SpaceView({ spaceId, autofitTo }: SpaceViewProps) {
         }}
       >
         <PaletteMenu
-          items={["note", "image", "url", "subspace"]}
+          // items={["note", "image", "url", "subspace"]}
+          items={["note", "subspace"]}
           onSelect={handlePaletteSelect}
         />
       </div>

packages/frontend/src/hooks/yjs/useYjsConnection.tsx

@@ -6,10 +6,16 @@ import * as Y from "yjs";
 import { generateUserColor } from "@/lib/utils";
 
 export default function useYjsConnection(docName: string) {
+  const [status, setStatus] = useState<
+    "connecting" | "connected" | "disconnected"
+  >("connecting");
+  const [error, setError] = useState<Error>();
   const [yDoc, setYDoc] = useState<Y.Doc>();
   const [yProvider, setYProvider] = useState<Y.AbstractConnector>();
 
   useEffect(() => {
+    setStatus("connecting");
+
     const doc = new Y.Doc();
     const provider = new WebsocketProvider(
       `ws://${import.meta.env.DEV ? "localhost" : "www.honeyflow.life"}/ws/space`,
@@ -28,9 +34,17 @@ export default function useYjsConnection(docName: string) {
         if (event.status === "connected") {
           awareness.setLocalStateField("color", generateUserColor());
         }
+        setStatus(event.status);
       },
     );
 
+    provider.once("connection-close", (event: CloseEvent) => {
+      if (event.code === 1008) {
+        provider.shouldConnect = false;
+        setError(new Error("찾을 수 없거나 접근할 수 없는 스페이스예요."));
+      }
+    });
+
     return () => {
       if (provider.bcconnected || provider.wsconnected) {
         provider.disconnect();
@@ -41,5 +55,5 @@ export default function useYjsConnection(docName: string) {
     };
   }, [docName]);
 
-  return { yProvider, yDoc, setYProvider, setYDoc };
+  return { status, error, yProvider, yDoc, setYProvider, setYDoc };
 }

packages/frontend/src/lib/utils.ts

@@ -88,7 +88,7 @@ export function createSafeContext<T>(defaultValue?: T) {
 }
 
 export function generateUniqueId() {
-  return Math.random().toString(36);
+  return Math.random().toString(36).slice(2);
 }
 
 // 노출과 명도는 유지, 색상만 랜덤

packages/frontend/src/pages/Home.tsx

@@ -31,7 +31,9 @@ type CreateSpaceButtonProps = {
 
 function CreateSpaceButton({ navigate }: CreateSpaceButtonProps) {
   const [spaceName, setSpaceName] = useState("");
+  const [isLoading, setIsLoading] = useState(false);
   const [error, setError] = useState("");
+
   const handleCreateSpace = (e: FormEvent) => {
     e.preventDefault();
     const targetSpaceName = spaceName.trim();
@@ -41,13 +43,18 @@ function CreateSpaceButton({ navigate }: CreateSpaceButtonProps) {
       return;
     }
 
+    setIsLoading(true);
+
     requestCreateSpace(targetSpaceName)
       .then((res) => {
         const { urlPath } = res;
         navigate(`/space/${urlPath}`);
       })
       .catch((error) => {
         setError(`스페이스 생성에 실패했어요. (${error})`);
+      })
+      .finally(() => {
+        setIsLoading(false);
       });
   };
 
@@ -77,9 +84,21 @@ function CreateSpaceButton({ navigate }: CreateSpaceButtonProps) {
           {error && <p className="text-red-500 text-sm mt-2">{error}</p>}
           <DialogFooter className="mt-4">
             <DialogClose asChild>
-              <Button variant="ghost">취소</Button>
+              <Button
+                variant="ghost"
+                disabled={isLoading}
+                aria-disabled={isLoading}
+              >
+                취소
+              </Button>
             </DialogClose>
-            <Button type="submit">생성</Button>
+            <Button
+              type="submit"
+              disabled={isLoading}
+              aria-disabled={isLoading}
+            >
+              생성
+            </Button>
           </DialogFooter>
         </form>
       </DialogContent>

packages/frontend/src/pages/NotFound.tsx

@@ -0,0 +1,22 @@
+import { Link } from "react-router-dom";
+
+import { MoveLeftIcon } from "lucide-react";
+
+import ErrorSection from "@/components/ErrorSection";
+import { Button } from "@/components/ui/button";
+
+export default function NotFoundPage() {
+  return (
+    <ErrorSection
+      description="찾을 수 없는 페이지예요"
+      RestoreActions={() => (
+        <Button asChild>
+          <Link to="/">
+            <MoveLeftIcon />
+            처음으로 돌아가기
+          </Link>
+        </Button>
+      )}
+    />
+  );
+}

packages/frontend/src/pages/Space.tsx

@@ -1,8 +1,12 @@
 import { useRef } from "react";
-import { useParams } from "react-router-dom";
+import { useNavigate, useParams } from "react-router-dom";
 
+import { CircleDashedIcon, MoveLeftIcon } from "lucide-react";
+
+import ErrorSection from "@/components/ErrorSection";
 import SpacePageHeader from "@/components/space/SpacePageHeader";
 import SpaceView from "@/components/space/SpaceView";
+import { Button } from "@/components/ui/button";
 import useYjsConnection from "@/hooks/yjs/useYjsConnection";
 import { YjsStoreProvider } from "@/store/yjs";
 
@@ -11,15 +15,41 @@ interface SpacePageParams extends Record<string, string | undefined> {
 }
 
 export default function SpacePage() {
+  const navigate = useNavigate();
   const { spaceId } = useParams<SpacePageParams>();
 
   if (!spaceId) {
     throw new Error("");
   }
 
-  const { yDoc, yProvider, setYDoc, setYProvider } = useYjsConnection(spaceId);
+  const { error, status, yDoc, yProvider, setYDoc, setYProvider } =
+    useYjsConnection(spaceId);
   const containerRef = useRef<HTMLDivElement>(null);
 
+  if (error) {
+    return (
+      <ErrorSection
+        description={error.message}
+        RestoreActions={() => (
+          <>
+            <Button variant="outline" onClick={() => navigate("/")}>
+              <MoveLeftIcon />
+              처음으로 돌아가기
+            </Button>
+          </>
+        )}
+      />
+    );
+  }
+
+  if (status === "connecting") {
+    return (
+      <div className="flex justify-center items-center h-full">
+        <CircleDashedIcon className="animate-spin w-32 h-32 text-primary" />
+      </div>
+    );
+  }
+
   return (
     <YjsStoreProvider value={{ yDoc, yProvider, setYDoc, setYProvider }}>
       <div className="w-full h-full" ref={containerRef}>