Refactoring, regression testing until Phase 1 end.

frontend/src/lib/services/api.ts

@@ -246,6 +246,7 @@ interface LoginResponse {
   refresh_token: string;
   user: {
     id: string;
+    name: string;
     email: string;
     role: 'superuser' | 'manager' | 'developer' | 'top_brass';
   };

frontend/src/lib/stores/auth.ts

@@ -3,27 +3,84 @@
  * 
  * Svelte store for user authentication state, token management,
  * and user profile information.
+ * 
+ * Features:
+ * - Centralized authentication state machine
+ * - Consistent error message handling
+ * - Persistent storage integration
+ * - Type-safe state transitions
  */
 
-import { writable, derived } from 'svelte/store';
+import { writable, derived, get } from 'svelte/store';
 import { browser } from '$app/environment';
 import { authApi, setTokens, clearTokens, getAccessToken } from '$lib/services/api';
 
-// User type
+// ============================================================================
+// Types
+// ============================================================================
+
+export type UserRole = 'superuser' | 'manager' | 'developer' | 'top_brass';
+
 export interface User {
   id: string;
+  name: string;
   email: string;
-  role: 'superuser' | 'manager' | 'developer' | 'top_brass';
+  role: UserRole;
 }
 
-// Auth state type
+export type AuthStatus = 'idle' | 'loading' | 'authenticated' | 'unauthenticated' | 'error';
+
 export interface AuthState {
-  isAuthenticated: boolean;
-  isLoading: boolean;
+  status: AuthStatus;
   error: string | null;
+  lastErrorAt: number | null;
 }
 
-// User store
+// ============================================================================
+// Error Messages
+// ============================================================================
+
+const ERROR_MESSAGES = {
+  INVALID_CREDENTIALS: 'Invalid email or password. Please try again.',
+  NETWORK_ERROR: 'Unable to connect to the server. Please check your connection.',
+  SERVER_ERROR: 'An error occurred on the server. Please try again later.',
+  SESSION_EXPIRED: 'Your session has expired. Please log in again.',
+  UNAUTHORIZED: 'You are not authorized to access this resource.',
+  UNKNOWN_ERROR: 'An unexpected error occurred. Please try again.',
+  VALIDATION_ERROR: 'Please check your input and try again.',
+} as const;
+
+function getErrorMessage(error: unknown): string {
+  if (error instanceof Error) {
+    // Map known error patterns to consistent messages
+    const message = error.message.toLowerCase();
+    
+    if (message.includes('invalid credentials') || message.includes('unauthorized')) {
+      return ERROR_MESSAGES.INVALID_CREDENTIALS;
+    }
+    if (message.includes('network') || message.includes('fetch')) {
+      return ERROR_MESSAGES.NETWORK_ERROR;
+    }
+    if (message.includes('timeout') || message.includes('504') || message.includes('503')) {
+      return ERROR_MESSAGES.SERVER_ERROR;
+    }
+    if (message.includes('session') || message.includes('expired')) {
+      return ERROR_MESSAGES.SESSION_EXPIRED;
+    }
+    if (message.includes('validation') || message.includes('invalid')) {
+      return ERROR_MESSAGES.VALIDATION_ERROR;
+    }
+    
+    return error.message;
+  }
+  
+  return ERROR_MESSAGES.UNKNOWN_ERROR;
+}
+
+// ============================================================================
+// Stores
+// ============================================================================
+
 function createUserStore() {
   const { subscribe, set, update } = writable<User | null>(null);
 
@@ -37,64 +94,79 @@ function createUserStore() {
 
 export const user = createUserStore();
 
-// Authentication state store
 function createAuthStore() {
   const { subscribe, set, update } = writable<AuthState>({
-    isAuthenticated: false,
-    isLoading: false,
+    status: 'idle',
     error: null,
+    lastErrorAt: null,
   });
 
   return {
     subscribe,
-    set,
-    update,
-    setLoading: (loading: boolean) => update((state) => ({ ...state, isLoading: loading })),
-    setError: (error: string | null) => update((state) => ({ ...state, error })),
+    
+    // State transitions
+    setIdle: () => set({ status: 'idle', error: null, lastErrorAt: null }),
+    setLoading: () => update((state) => ({ ...state, status: 'loading', error: null })),
+    setAuthenticated: () => set({ status: 'authenticated', error: null, lastErrorAt: null }),
+    setUnauthenticated: () => set({ status: 'unauthenticated', error: null, lastErrorAt: null }),
+    setError: (error: unknown) => {
+      const errorMessage = getErrorMessage(error);
+      set({ 
+        status: 'error', 
+        error: errorMessage, 
+        lastErrorAt: Date.now() 
+      });
+    },
+    
+    // Utility
     clearError: () => update((state) => ({ ...state, error: null })),
-    setAuthenticated: (authenticated: boolean) => update((state) => ({ ...state, isAuthenticated: authenticated })),
+    
+    // Getters
+    getState: () => get({ subscribe }),
   };
 }
 
 export const auth = createAuthStore();
 
-// Derived store to check if user is authenticated
+// ============================================================================
+// Derived Stores
+// ============================================================================
+
+/** Check if user is authenticated */
 export const isAuthenticated = derived(
   [user, auth],
-  ([$user, $auth]) => $user !== null && $auth.isAuthenticated
+  ([$user, $auth]) => $user !== null && $auth.status === 'authenticated'
 );
 
-// Derived store to get user role
+/** Get current user role */
 export const userRole = derived(user, ($user) => $user?.role || null);
 
-// Initialize auth state from localStorage (client-side only)
-export function initAuth(): void {
-  if (!browser) return;
+/** Check if auth is in loading state */
+export const isLoading = derived(auth, ($auth) => $auth.status === 'loading');
 
-  const token = getAccessToken();
-  if (token) {
-    auth.setAuthenticated(true);
-    // Optionally fetch user profile here
-  }
-}
+/** Get current error message */
+export const authError = derived(auth, ($auth) => $auth.error);
 
-// Login credentials type
-interface LoginCredentials {
+// ============================================================================
+// Actions
+// ============================================================================
+
+export interface LoginCredentials {
   email: string;
   password: string;
 }
 
-// Login result type
-interface LoginResult {
+export interface LoginResult {
   success: boolean;
   user?: User;
   error?: string;
 }
 
-// Login function
+/**
+ * Login action
+ */
 export async function login(credentials: LoginCredentials): Promise<LoginResult> {
-  auth.setLoading(true);
-  auth.clearError();
+  auth.setLoading();
 
   try {
     const response = await authApi.login(credentials);
@@ -102,23 +174,23 @@ export async function login(credentials: LoginCredentials): Promise<LoginResult>
     if (response.access_token && response.refresh_token) {
       setTokens(response.access_token, response.refresh_token);
       user.set(response.user || null);
-      auth.setAuthenticated(true);
+      auth.setAuthenticated();
       return { success: true, user: response.user };
     } else {
       throw new Error('Invalid response from server');
     }
   } catch (error) {
-    const errorMessage = error instanceof Error ? error.message : 'Login failed';
-    auth.setError(errorMessage);
+    const errorMessage = getErrorMessage(error);
+    auth.setError(error);
     return { success: false, error: errorMessage };
-  } finally {
-    auth.setLoading(false);
   }
 }
 
-// Logout function
+/**
+ * Logout action
+ */
 export async function logout(): Promise<void> {
-  auth.setLoading(true);
+  auth.setLoading();
 
   try {
     await authApi.logout();
@@ -127,53 +199,73 @@ export async function logout(): Promise<void> {
   } finally {
     clearTokens();
     user.clear();
-    auth.setAuthenticated(false);
-    auth.setLoading(false);
+    auth.setUnauthenticated();
   }
 }
 
-// Check authentication status
+/**
+ * Check authentication status
+ */
 export async function checkAuth(): Promise<boolean> {
   if (!browser) return false;
 
   const token = getAccessToken();
   if (!token) {
-    auth.setAuthenticated(false);
+    auth.setUnauthenticated();
     user.clear();
     return false;
   }
 
-  auth.setAuthenticated(true);
+  // If we have a token but no user, we're in a "restoring" state
+  const currentUser = get(user);
+  if (!currentUser) {
+    // Token exists but user data is missing - try to restore from token
+    // For now, we mark as authenticated and let the app fetch user data
+    auth.setAuthenticated();
+  }
+
   return true;
 }
 
-// Role check helpers
-export function hasRole(role: string): boolean {
-  let currentRole: string | null = null;
-  const unsubscribe = userRole.subscribe((r) => {
-    currentRole = r;
-  });
-  unsubscribe();
-  return currentRole === role;
+/**
+ * Initialize auth state from storage
+ */
+export function initAuth(): void {
+  if (!browser) return;
+
+  const token = getAccessToken();
+  if (token) {
+    auth.setAuthenticated();
+  } else {
+    auth.setUnauthenticated();
+  }
 }
 
-export function isSuperuser(): boolean {
-  return hasRole('superuser');
+/**
+ * Clear any authentication error
+ */
+export function clearAuthError(): void {
+  auth.clearError();
 }
 
-export function isManager(): boolean {
-  return hasRole('manager');
+// ============================================================================
+// Role Helpers
+// ============================================================================
+
+export function hasRole(role: UserRole): boolean {
+  const currentUser = get(user);
+  return currentUser?.role === role;
 }
 
-export function isDeveloper(): boolean {
-  return hasRole('developer');
-}
+export const isSuperuser = () => hasRole('superuser');
+export const isManager = () => hasRole('manager');
+export const isDeveloper = () => hasRole('developer');
+export const isTopBrass = () => hasRole('top_brass');
 
-export function isTopBrass(): boolean {
-  return hasRole('top_brass');
-}
+// ============================================================================
+// Permission Helpers
+// ============================================================================
 
-// Permission check (can be expanded based on requirements)
 export function canManageTeamMembers(): boolean {
   return isSuperuser() || isManager();
 }

frontend/src/routes/login/+page.svelte

@@ -1,11 +1,13 @@
 <script lang="ts">
   import { goto } from '$app/navigation';
   import LoginForm from '$lib/components/Auth/LoginForm.svelte';
-  import { login, auth } from '$lib/stores/auth';
+  import { login, isLoading, authError, clearAuthError } from '$lib/stores/auth';
   import { LayoutDashboard } from 'lucide-svelte';
 
   async function handleLogin(event: CustomEvent<{ email: string; password: string }>) {
     const { email, password } = event.detail;
+    clearAuthError();
+    
     const result = await login({ email, password });
     
     if (result.success) {
@@ -40,8 +42,8 @@
 
       <LoginForm
         on:login={handleLogin}
-        isLoading={$auth.isLoading}
-        errorMessage={$auth.error}
+        isLoading={$isLoading}
+        errorMessage={$authError}
       />
 
       <div class="divider text-base-content/40 text-sm">Demo Access</div>