fix: when the system disables registration, users can still register and log in through SSO

web/src/pages/AuthCallback.tsx

@@ -3,14 +3,17 @@ import { LoaderIcon } from "lucide-react";
 import { ClientError } from "nice-grpc-web";
 import { useEffect, useState } from "react";
 import { useSearchParams } from "react-router-dom";
+import { Button } from "@usememos/mui";
 import { authServiceClient } from "@/grpcweb";
 import { absolutifyLink } from "@/helpers/utils";
 import useNavigateTo from "@/hooks/useNavigateTo";
+import { workspaceStore } from "@/store/v2";
 import { initialUserStore } from "@/store/v2/user";
 
 interface State {
   loading: boolean;
   errorMessage: string;
+  redirectCountdown?: number;
 }
 
 const AuthCallback = () => {
@@ -20,6 +23,7 @@ const AuthCallback = () => {
     loading: true,
     errorMessage: "",
   });
+  const workspaceGeneralSetting = workspaceStore.state.generalSetting;
 
   useEffect(() => {
     const code = searchParams.get("code");
@@ -60,23 +64,77 @@ const AuthCallback = () => {
         navigateTo("/");
       } catch (error: any) {
         console.error(error);
-        setState({
-          loading: false,
-          errorMessage: (error as ClientError).details,
-        });
+        const errorDetails = (error as ClientError).details;
+
+        // If user registration is disallowed and the error indicates that sign up is not allowed
+        if (workspaceGeneralSetting.disallowUserRegistration && 
+            (errorDetails.includes("registration is not allowed") || 
+             errorDetails.includes("sign up is not allowed"))) {
+          const redirectSeconds = 2;
+          setState({
+            loading: false,
+            errorMessage: errorDetails || "Sign up is not allowed.",
+            redirectCountdown: redirectSeconds,
+          });
+
+          // Set up countdown timer
+          const countdownInterval = setInterval(() => {
+            setState((prevState) => ({
+              ...prevState,
+              redirectCountdown: prevState.redirectCountdown ? prevState.redirectCountdown - 1 : 0,
+            }));
+          }, 1000);
+
+          // Add a timer to redirect to the login page after the countdown
+          const redirectTimer = setTimeout(() => {
+            navigateTo("/auth");
+          }, redirectSeconds * 1000);
+
+          return () => {
+            clearTimeout(redirectTimer);
+            clearInterval(countdownInterval);
+          };
+        } else {
+          // Other errors
+          setState({
+            loading: false,
+            errorMessage: errorDetails || "Authentication failed",
+          });
+        }
       }
     })();
-  }, [searchParams]);
+  }, [searchParams, workspaceGeneralSetting.disallowUserRegistration]);
+
+  const handleReturnToLogin = () => {
+    navigateTo("/auth");
+  };
 
   return (
     <div className="p-4 py-24 w-full h-full flex justify-center items-center">
       {state.loading ? (
         <LoaderIcon className="animate-spin dark:text-gray-200" />
       ) : (
-        <div className="max-w-lg font-mono whitespace-pre-wrap opacity-80">{state.errorMessage}</div>
+        <div className="flex flex-col items-center">
+          <div className="max-w-lg font-mono whitespace-pre-wrap opacity-80 mb-4">{state.errorMessage}</div>
+          {state.redirectCountdown !== undefined && (
+            <div className="flex flex-col items-center gap-3">
+              <div className="flex items-center gap-2 text-sm text-gray-500">
+                <LoaderIcon className="w-4 h-4 animate-spin" />
+                <span>Redirecting to login page in {state.redirectCountdown} {state.redirectCountdown === 1 ? 'second' : 'seconds'}...</span>
+              </div>
+              <Button 
+                color="primary" 
+                size="sm" 
+                onClick={handleReturnToLogin}
+              >
+                Return to Login Now
+              </Button>
+            </div>
+          )}
+        </div>
       )}
     </div>
   );
 };
 
-export default AuthCallback;
+export default AuthCallback;