fix: store redirect to localStorage to avoid loss of redirect (#5929)

Stores `redirect` param in localStorage in the Authentication component.
Retrieves the `redirect` param from localStorage at the Login screen if
it is not there in the url.

This will solve losing the redirect information all provider logins

Closes #
[1-1890](https://linear.app/unleash/issue/1-1890/capture-path-before-logging-in-and-redirect-to-it-if-there-and-custom)

---------

Signed-off-by: andreas-unleash <andreas@getunleash.ai>

frontend/src/component/user/Authentication/Authentication.tsx

@@ -17,6 +17,7 @@ import { useAuthDetails } from 'hooks/api/getters/useAuth/useAuthDetails';
 import { AUTH_PAGE_ID } from 'utils/testIds';
 import { ReactElement, useEffect } from 'react';
 import { usePlausibleTracker } from 'hooks/usePlausibleTracker';
+import { setSessionStorageItem } from 'utils/storage';
 
 interface IAuthenticationProps {
     redirect: string;
@@ -32,6 +33,12 @@ const Authentication = ({
     const error = params.get('errorMsg');
     const { trackEvent } = usePlausibleTracker();
 
+    useEffect(() => {
+        if (redirect) {
+            setSessionStorageItem('login-redirect', redirect, 1000 * 60 * 10);
+        }
+    }, [redirect]);
+
     useEffect(() => {
         if (invited) {
             trackEvent('invite', {

frontend/src/component/user/Login/Login.tsx

@@ -8,6 +8,7 @@ import Authentication from '../Authentication/Authentication';
 import { useAuthDetails } from 'hooks/api/getters/useAuth/useAuthDetails';
 import { useAuthUser } from 'hooks/api/getters/useAuth/useAuthUser';
 import { parseRedirectParam } from 'component/user/Login/parseRedirectParam';
+import { getSessionStorageItem, setSessionStorageItem } from 'utils/storage';
 
 const StyledDiv = styled('div')(({ theme }) => ({
     display: 'flex',
@@ -26,9 +27,11 @@ const Login = () => {
     const query = useQueryParams();
     const resetPassword = query.get('reset') === 'true';
     const invited = query.get('invited') === 'true';
-    const redirect = query.get('redirect') || '/';
+    const redirect =
+        query.get('redirect') || getSessionStorageItem('login-redirect') || '/';
 
     if (user) {
+        setSessionStorageItem('login-redirect');
         return <Navigate to={parseRedirectParam(redirect)} replace />;
     }
 

frontend/src/utils/storage.test.ts

@@ -0,0 +1,120 @@
+import {
+    setLocalStorageItem,
+    getLocalStorageItem,
+    setSessionStorageItem,
+    getSessionStorageItem,
+} from './storage';
+import { vi } from 'vitest';
+
+// Mocking the global localStorage
+const localStorageMock = (() => {
+    let store: Record<string, string> = {};
+
+    return {
+        getItem(key: string) {
+            return store[key] || null;
+        },
+        setItem(key: string, value: string) {
+            store[key] = value.toString();
+        },
+        removeItem(key: string) {
+            delete store[key];
+        },
+        clear() {
+            store = {};
+        },
+    };
+})();
+
+const sessionStorageMock = (() => {
+    let store: Record<string, string> = {};
+
+    return {
+        getItem(key: string) {
+            return store[key] || null;
+        },
+        setItem(key: string, value: string) {
+            store[key] = value.toString();
+        },
+        removeItem(key: string) {
+            delete store[key];
+        },
+        clear() {
+            store = {};
+        },
+    };
+})();
+
+Object.defineProperty(window, 'localStorage', {
+    value: localStorageMock,
+});
+
+Object.defineProperty(window, 'sessionStorage', {
+    value: sessionStorageMock,
+});
+
+// Test suite
+describe('localStorage with TTL', () => {
+    beforeEach(() => {
+        localStorage.clear();
+        vi.useFakeTimers();
+    });
+
+    test('item should be retrievable before TTL expires', () => {
+        setLocalStorageItem('testKey', 'testValue', 600000);
+        expect(getLocalStorageItem('testKey')).toBe('testValue');
+    });
+
+    test('item should not be retrievable after TTL expires', () => {
+        setLocalStorageItem('testKey', 'testValue', 500000);
+
+        vi.advanceTimersByTime(600000);
+
+        expect(getLocalStorageItem('testKey')).toBeUndefined();
+    });
+    test('object should be retrievable before TTL expires', () => {
+        const testObject = { name: 'Test', number: 123 };
+        setLocalStorageItem('testObjectKey', testObject, 600000);
+
+        const retrievedObject = getLocalStorageItem<{
+            name: string;
+            number: number;
+        }>('testObjectKey');
+        expect(retrievedObject).toEqual(testObject);
+    });
+
+    test('object should not be retrievable after TTL expires', () => {
+        const testObject = { name: 'Test', number: 123 };
+        setLocalStorageItem('testObjectKey', testObject, 500000);
+
+        vi.advanceTimersByTime(600000);
+
+        const retrievedObject = getLocalStorageItem<{
+            name: string;
+            number: number;
+        }>('testObjectKey');
+        expect(retrievedObject).toBeUndefined();
+    });
+
+    test('object should be retrievable before TTL expires in sessionStorage', () => {
+        const testObject = { name: 'TestSession', number: 456 };
+        setSessionStorageItem('testObjectKeySession', testObject, 500000);
+
+        const retrievedObject = getSessionStorageItem<typeof testObject>(
+            'testObjectKeySession',
+        );
+        expect(retrievedObject).toEqual(testObject);
+    });
+
+    test('object should not be retrievable after TTL expires in sessionStorage', () => {
+        const testObject = { name: 'TestSession', number: 456 };
+        setSessionStorageItem('testObjectKeySession', testObject, 500000); // 10 minutes TTL
+
+        vi.advanceTimersByTime(600000);
+
+        const retrievedObject = getSessionStorageItem<typeof testObject>(
+            'testObjectKeySession',
+        );
+        expect(retrievedObject).toBeUndefined();
+    });
+});

frontend/src/utils/storage.ts

@@ -1,28 +1,90 @@
+type Expirable<T> = {
+    value: T | undefined;
+    expiry: number | null;
+};
+
 // Get an item from localStorage.
 // Returns undefined if the browser denies access.
 export function getLocalStorageItem<T>(key: string): T | undefined {
     try {
-        return parseStoredItem<T>(window.localStorage.getItem(key));
+        const itemStr = window.localStorage.getItem(key);
+        if (!itemStr) {
+            return undefined;
+        }
+
+        const item: Expirable<T> | undefined = parseStoredItem(itemStr);
+        if (item?.expiry && new Date().getTime() > item.expiry) {
+            window.localStorage.removeItem(key);
+            return undefined;
+        }
+        return item?.value;
     } catch (err: unknown) {
         console.warn(err);
+        return undefined;
     }
 }
 
 // Store an item in localStorage.
 // Does nothing if the browser denies access.
-export function setLocalStorageItem(key: string, value: unknown) {
+export function setLocalStorageItem<T>(
+    key: string,
+    value: T | undefined = undefined,
+    timeToLive?: number,
+) {
     try {
-        window.localStorage.setItem(
-            key,
-            JSON.stringify(value, (_key, value) =>
-                value instanceof Set ? [...value] : value,
-            ),
-        );
+        const item: Expirable<T> = {
+            value,
+            expiry:
+                timeToLive !== undefined
+                    ? new Date().getTime() + timeToLive
+                    : null,
+        };
+        window.localStorage.setItem(key, JSON.stringify(item));
     } catch (err: unknown) {
         console.warn(err);
     }
 }
 
+// Store an item in sessionStorage with optional TTL
+export function setSessionStorageItem<T>(
+    key: string,
+    value: T | undefined = undefined,
+    timeToLive?: number,
+) {
+    try {
+        const item: Expirable<T> = {
+            value,
+            expiry:
+                timeToLive !== undefined
+                    ? new Date().getTime() + timeToLive
+                    : null,
+        };
+        window.sessionStorage.setItem(key, JSON.stringify(item));
+    } catch (err: unknown) {
+        console.warn(err);
+    }
+}
+
+// Get an item from sessionStorage, checking for TTL
+export function getSessionStorageItem<T>(key: string): T | undefined {
+    try {
+        const itemStr = window.sessionStorage.getItem(key);
+        if (!itemStr) {
+            return undefined;
+        }
+
+        const item: Expirable<T> | undefined = parseStoredItem(itemStr);
+        if (item?.expiry && new Date().getTime() > item.expiry) {
+            window.sessionStorage.removeItem(key);
+            return undefined;
+        }
+        return item?.value;
+    } catch (err: unknown) {
+        console.warn(err);
+        return undefined;
+    }
+}
+
 // Parse an item from localStorage.
 // Returns undefined if the item could not be parsed.
 function parseStoredItem<T>(data: string | null): T | undefined {