fix: auth disabled routing and UI

frontend/src/app/login/__tests__/page.test.tsx

@@ -3,27 +3,38 @@ import { render, screen, fireEvent, waitFor } from "@testing-library/react"
 import "@testing-library/jest-dom"
 import LoginPage from "@/app/login/page"
 import { useAuth } from "@/hooks/useAuth"
+import { useRouter } from "next/navigation"
 import { toast } from "sonner"
 
+// Mock the necessary hooks and modules
 jest.mock("@/hooks/useAuth")
 jest.mock("sonner", () => ({
   toast: {
     error: jest.fn(),
   },
 }))
+jest.mock("next/navigation", () => ({
+  useRouter: jest.fn(),
+}))
 
 const mockedUseAuth = useAuth as jest.Mock
 const mockedToast = toast as jest.Mocked<typeof toast>
+const mockedUseRouter = useRouter as jest.Mock
 
 describe("LoginPage", () => {
   const login = jest.fn()
 
   beforeEach(() => {
     jest.clearAllMocks()
-    mockedUseAuth.mockReturnValue({ login })
+    // Default mock for useAuth
+    mockedUseAuth.mockReturnValue({
+      login,
+      isAuthenticated: false,
+      isLoading: false,
+    })
   })
 
-  it("renders the login page", () => {
+  it("renders the login page when not authenticated", () => {
     render(<LoginPage />)
     expect(screen.getByText("LetterFeed")).toBeInTheDocument()
     expect(screen.getByLabelText("Username")).toBeInTheDocument()
@@ -31,6 +42,28 @@ describe("LoginPage", () => {
     expect(screen.getByRole("button", { name: "Sign In" })).toBeInTheDocument()
   })
 
+  it("shows loading spinner when isLoading is true", () => {
+    mockedUseAuth.mockReturnValue({
+      login,
+      isAuthenticated: false,
+      isLoading: true,
+    })
+    render(<LoginPage />)
+    expect(screen.getByTestId("loading-spinner")).toBeInTheDocument()
+  })
+
+  it("redirects when authenticated", () => {
+    const push = jest.fn()
+    mockedUseRouter.mockReturnValue({ push })
+    mockedUseAuth.mockReturnValue({
+      login,
+      isAuthenticated: true,
+      isLoading: false,
+    })
+    render(<LoginPage />)
+    expect(push).toHaveBeenCalledWith("/")
+  })
+
   it("allows typing in the username and password fields", () => {
     render(<LoginPage />)
     const usernameInput = screen.getByLabelText("Username")

frontend/src/app/login/page.tsx

@@ -1,7 +1,7 @@
 "use client"
 
 import type React from "react"
-import { useState } from "react"
+import { useEffect, useState } from "react"
 import { Button } from "@/components/ui/button"
 import { Card, CardContent } from "@/components/ui/card"
 import { Input } from "@/components/ui/input"
@@ -9,11 +9,20 @@ import { Label } from "@/components/ui/label"
 import Image from "next/image"
 import { useAuth } from "@/hooks/useAuth"
 import { toast } from "sonner"
+import { useRouter } from "next/navigation"
+import { LoadingSpinner } from "@/components/letterfeed/LoadingSpinner"
 
 export default function LoginPage() {
   const [username, setUsername] = useState("")
   const [password, setPassword] = useState("")
-  const { login } = useAuth()
+  const { login, isAuthenticated, isLoading } = useAuth()
+  const router = useRouter()
+
+  useEffect(() => {
+    if (!isLoading && isAuthenticated) {
+      router.push("/")
+    }
+  }, [isLoading, isAuthenticated, router])
 
   const handleLogin = async (e: React.FormEvent) => {
     e.preventDefault()
@@ -25,11 +34,15 @@ export default function LoginPage() {
 
     try {
       await login(username, password)
-    } catch  {
+    } catch {
       // The error is already toasted by the API layer,
     }
   }
 
+  if (isLoading || (!isLoading && isAuthenticated)) {
+    return <LoadingSpinner />
+  }
+
   return (
     <div className="min-h-screen bg-background flex items-center justify-center">
       <div className="max-w-md w-full space-y-8 p-8">

frontend/src/components/letterfeed/Header.tsx

@@ -13,7 +13,7 @@ interface HeaderProps {
 }
 
 export function Header({ onOpenAddNewsletter, onOpenSettings }: HeaderProps) {
-  const { logout } = useAuth()
+  const { logout, isAuthEnabled } = useAuth()
   const handleProcessEmails = async () => {
     try {
       await processEmails()
@@ -62,10 +62,12 @@ export function Header({ onOpenAddNewsletter, onOpenSettings }: HeaderProps) {
           Settings
         </Button>
 
-        <Button variant="outline" onClick={logout}>
-          <LogOut className="w-4 h-4 mr-2" />
-          Logout
-        </Button>
+        {isAuthEnabled && (
+          <Button variant="outline" onClick={logout}>
+            <LogOut className="w-4 h-4 mr-2" />
+            Logout
+          </Button>
+        )}
       </div>
     </div>
   )

frontend/src/components/letterfeed/__tests__/Header.test.tsx

@@ -4,6 +4,7 @@ import { Toaster } from "@/components/ui/sonner"
 import { toast } from "sonner"
 import * as api from "@/lib/api"
 import { AuthProvider } from "@/contexts/AuthContext"
+import { useAuth } from "@/hooks/useAuth"
 
 jest.mock("@/lib/api")
 jest.mock("next/navigation", () => ({
@@ -11,7 +12,10 @@ jest.mock("next/navigation", () => ({
     push: jest.fn(),
   }),
 }))
+jest.mock("@/hooks/useAuth")
+
 const mockedApi = api as jest.Mocked<typeof api>
+const mockedUseAuth = useAuth as jest.Mock
 
 // Mock the toast functions
 jest.mock("sonner", () => {
@@ -28,6 +32,7 @@ jest.mock("sonner", () => {
 describe("Header", () => {
   const onOpenAddNewsletter = jest.fn()
   const onOpenSettings = jest.fn()
+  const logout = jest.fn()
   const consoleError = jest.spyOn(console, "error").mockImplementation(() => {})
 
   const renderWithAuthProvider = (component: React.ReactElement) => {
@@ -37,14 +42,18 @@ describe("Header", () => {
   beforeEach(() => {
     jest.clearAllMocks()
     consoleError.mockClear()
+    mockedUseAuth.mockReturnValue({
+      logout,
+      isAuthEnabled: true, // Default to auth being enabled for most tests
+    })
   })
 
   afterAll(() => {
     consoleError.mockRestore()
   })
 
-  it("renders the header with title and buttons", () => {
-    renderWithAuthProvider(
+  it("renders the header with title and buttons including logout", () => {
+    render(
       <Header
         onOpenAddNewsletter={onOpenAddNewsletter}
         onOpenSettings={onOpenSettings}
@@ -54,10 +63,25 @@ describe("Header", () => {
     expect(screen.getByText("Add Newsletter")).toBeInTheDocument()
     expect(screen.getByText("Settings")).toBeInTheDocument()
     expect(screen.getByText("Process Now")).toBeInTheDocument()
+    expect(screen.getByText("Logout")).toBeInTheDocument()
+  })
+
+  it("does not render the logout button if auth is disabled", () => {
+    mockedUseAuth.mockReturnValue({
+      logout,
+      isAuthEnabled: false,
+    })
+    render(
+      <Header
+        onOpenAddNewsletter={onOpenAddNewsletter}
+        onOpenSettings={onOpenSettings}
+      />
+    )
+    expect(screen.queryByText("Logout")).not.toBeInTheDocument()
   })
 
   it('calls onOpenAddNewsletter when "Add Newsletter" button is clicked', () => {
-    renderWithAuthProvider(
+    render(
       <Header
         onOpenAddNewsletter={onOpenAddNewsletter}
         onOpenSettings={onOpenSettings}
@@ -68,7 +92,7 @@ describe("Header", () => {
   })
 
   it('calls onOpenSettings when "Settings" button is clicked', () => {
-    renderWithAuthProvider(
+    render(
       <Header
         onOpenAddNewsletter={onOpenAddNewsletter}
         onOpenSettings={onOpenSettings}
@@ -81,7 +105,7 @@ describe("Header", () => {
   it('calls the process emails API when "Process Now" button is clicked and shows success toast', async () => {
     mockedApi.processEmails.mockResolvedValue({ message: "Success" })
 
-    renderWithAuthProvider(
+    render(
       <>
         <Header
           onOpenAddNewsletter={onOpenAddNewsletter}
@@ -107,7 +131,7 @@ describe("Header", () => {
   it("shows an error toast if the process emails API call fails", async () => {
     mockedApi.processEmails.mockRejectedValue(new Error("Failed to process"))
 
-    renderWithAuthProvider(
+    render(
       <>
         <Header
           onOpenAddNewsletter={onOpenAddNewsletter}

frontend/src/contexts/AuthContext.tsx

@@ -6,6 +6,7 @@ import { useRouter } from "next/navigation"
 
 interface AuthContextType {
   isAuthenticated: boolean
+  isAuthEnabled: boolean
   login: (username: string, password: string) => Promise<void>
   logout: () => void
   isLoading: boolean
@@ -15,6 +16,7 @@ export const AuthContext = createContext<AuthContextType | undefined>(undefined)
 
 export const AuthProvider = ({ children }: { children: ReactNode }) => {
   const [isAuthenticated, setIsAuthenticated] = useState(false)
+  const [isAuthEnabled, setIsAuthEnabled] = useState(false)
   const [isLoading, setIsLoading] = useState(true)
   const router = useRouter()
 
@@ -23,6 +25,7 @@ export const AuthProvider = ({ children }: { children: ReactNode }) => {
       setIsLoading(true);
       try {
         const { auth_enabled } = await getAuthStatus();
+        setIsAuthEnabled(auth_enabled);
         if (!auth_enabled) {
           setIsAuthenticated(true);
         } else {
@@ -67,7 +70,7 @@ export const AuthProvider = ({ children }: { children: ReactNode }) => {
   }
 
   return (
-    <AuthContext.Provider value={{ isAuthenticated, login, logout, isLoading }}>
+    <AuthContext.Provider value={{ isAuthenticated, isAuthEnabled, login, logout, isLoading }}>
       {children}
     </AuthContext.Provider>
   )

frontend/src/contexts/__tests__/AuthContext.test.tsx

@@ -28,21 +28,27 @@ describe("AuthContext", () => {
     consoleError.mockRestore()
   })
 
-  it("authenticates if auth is not enabled", async () => {
+  it("authenticates and sets auth enabled to false if auth is not enabled on server", async () => {
     mockedApi.getAuthStatus.mockResolvedValue({ auth_enabled: false })
     render(
       <AuthProvider>
         <AuthContext.Consumer>
           {(value) => (
-            <span>
-              Is Authenticated: {value?.isAuthenticated.toString()}
-            </span>
+            <div>
+              <span>
+                Is Authenticated: {value?.isAuthenticated.toString()}
+              </span>
+              <span>
+                Is Auth Enabled: {value?.isAuthEnabled.toString()}
+              </span>
+            </div>
           )}
         </AuthContext.Consumer>
       </AuthProvider>
     )
     await waitFor(() => {
       expect(screen.getByText("Is Authenticated: true")).toBeInTheDocument()
+      expect(screen.getByText("Is Auth Enabled: false")).toBeInTheDocument()
     })
   })
 
@@ -54,15 +60,21 @@ describe("AuthContext", () => {
       <AuthProvider>
         <AuthContext.Consumer>
           {(value) => (
-            <span>
-              Is Authenticated: {value?.isAuthenticated.toString()}
-            </span>
+            <div>
+              <span>
+                Is Authenticated: {value?.isAuthenticated.toString()}
+              </span>
+              <span>
+                Is Auth Enabled: {value?.isAuthEnabled.toString()}
+              </span>
+            </div>
           )}
         </AuthContext.Consumer>
       </AuthProvider>
     )
     await waitFor(() => {
       expect(screen.getByText("Is Authenticated: true")).toBeInTheDocument()
+      expect(screen.getByText("Is Auth Enabled: true")).toBeInTheDocument()
     })
   })