Fix SPA with routes and no context

frontend/src/App.tsx

@@ -39,6 +39,7 @@ import '@fontsource/roboto/700.css';
 import MuiMarkdown from 'mui-markdown';
 
 const getConnectionBase = (loc: any): string => {
+  console.log(`getConnectionBase(${loc})`)
   if (!loc.host.match(/.*battle-linux.*/)) {
     return loc.protocol + "//" + loc.host;
   } else {
@@ -46,6 +47,8 @@ const getConnectionBase = (loc: any): string => {
   }
 }
 
+const connectionBase = getConnectionBase(window.location);
+
 interface TabProps {
   label?: string,
   path: string,
@@ -57,9 +60,13 @@ interface TabProps {
   }
 };
 
+const isValidUUIDv4 = (str: string): boolean => {
+  const pattern = /^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-4[0-9a-fA-F]{3}-[89ab][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$/i;
+  return pattern.test(str);
+}
+
 const App = () => {
   const [sessionId, setSessionId] = useState<string | undefined>(undefined);
-  const [connectionBase,] = useState<string>(getConnectionBase(window.location))
   const [menuOpen, setMenuOpen] = useState(false);
   const [isMenuClosing, setIsMenuClosing] = useState(false);
   const [activeTab, setActiveTab] = useState<number>(0);
@@ -272,51 +279,71 @@ const App = () => {
           </Scrollable>
         )
       }];
-  }, [about, connectionBase, sessionId, setSnack, isMobile]);
+  }, [about, sessionId, setSnack, isMobile]);
+
+  const fetchSession = useCallback((async (pathParts?: string[]) => {
+
+    try {
+      const response = await fetch(connectionBase + `/api/context`, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+      });
+
+      if (!response.ok) {
+        throw Error("Server is temporarily down.");
+      }
+      const new_session = (await response.json()).id;
+      console.log(`Session created: ${new_session}`);
+
+      if (pathParts === undefined) {
+        setSessionId(new_session);
+        const newPath = `/${new_session}`;
+        window.history.replaceState({}, '', newPath);
+      } else {
+        const currentPath = pathParts.length < 2 ? '' : pathParts[0];
+        let tabIndex = tabs.findIndex((tab) => tab.path === currentPath);
+        if (-1 === tabIndex) {
+          console.log(`Invalid path "${currentPath}" -- redirecting to default`);
+          window.history.replaceState({}, '', `/${new_session}`);
+          setActiveTab(0);
+        } else {
+          window.history.replaceState({}, '', `/${pathParts.join('/')}/${new_session}`);
+          setActiveTab(tabIndex);
+        }
+        setSessionId(new_session);
+      }
+    } catch (error: any) {
+      console.error(error);
+      setSnack("Server is temporarily down", "error");
+    }
+  }), [setSnack, tabs]);
 
   useEffect(() => {
     const url = new URL(window.location.href);
     const pathParts = url.pathname.split('/').filter(Boolean); // [path, sessionId]
-
-    const fetchSession = async () => {
-      try {
-        const response = await fetch(connectionBase + `/api/context`, {
-          method: 'POST',
-          headers: {
-            'Content-Type': 'application/json',
-          },
-        });
-
-        if (!response.ok) {
-          throw Error("Server is temporarily down.");
-        }
-        const data = await response.json();
-        console.log(`Session created: ${data.id}`);
-        setSessionId(data.id);
-
-        const newPath = `/${data.id}`;
-        window.history.replaceState({}, '', newPath);
-      } catch (error: any) {
-        console.error(error);
-        setSnack("Server is temporarily down", "error");
-      }
-    };
-
+    console.log(tabs);
     if (pathParts.length < 1) {
       console.log("No session id or path -- creating new session");
       fetchSession();
     } else {
       const currentPath = pathParts.length < 2 ? '' : pathParts[0];
-      const session = pathParts.length < 2 ? pathParts[0] : pathParts[1];
-      let tabIndex = tabs.findIndex((tab) => tab.path === currentPath);
-      if (-1 === tabIndex) {
-        console.log(`Invalid path "${currentPath}" -- redirecting to default`);
-        tabIndex = 0;
+      const path_session = pathParts.length < 2 ? pathParts[0] : pathParts[1];
+      if (!isValidUUIDv4(path_session)) {
+        console.log(`Invalid session id ${path_session}-- creating new session`);
+        fetchSession(pathParts);
+      } else {
+        let tabIndex = tabs.findIndex((tab) => tab.path === currentPath);
+        if (-1 === tabIndex) {
+          console.log(`Invalid path "${currentPath}" -- redirecting to default`);
+          tabIndex = 0;
+        }
+        setSessionId(path_session);
+        setActiveTab(tabIndex);
       }
-      setSessionId(session);
-      setActiveTab(tabIndex);
     }
-  }, [setSessionId, connectionBase, setSnack, tabs]);
+  }, [setSessionId, setSnack, tabs, fetchSession]);
 
   const handleMenuClose = () => {
     setIsMenuClosing(true);

frontend/src/ChatQuery.tsx

@@ -20,7 +20,6 @@ const ChatQuery = (props : ChatQueryInterface) => {
   if (typeof (tunables) === "string") {
     tunables = JSON.parse(tunables);
   }
-  console.log(tunables);
 
   if (submitQuery === undefined) {
     return (<Box>{prompt}</Box>);