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* Authentication Service Implementation
* Story 1.2: AWS Cognito Integration
* Story 1.2.1: "Remember me" session persistence via Amplify storage configuration
*
* Amplify V6 handles all token storage internally. We configure the storage location
* (localStorage vs sessionStorage) to control session persistence.
*/
import { ensureAmplifyConfigured } from '@/config/amplify';
import {
UserContext,
LoginCredentials,
SignUpData,
AuthError,
TokenRefreshResponse,
MfaChallenge,
UserPreferences,
CognitoTokenClaims,
UserRole,
} from '@/types/auth';
interface SignInResult {
success: boolean;
user?: UserContext;
accessToken?: string;
error?: AuthError;
mfaChallenge?: MfaChallenge;
/**
* Set when Cognito returns a next-step that the user can complete inline (no
* separate MFA channel). Today only `CONFIRM_SIGN_IN_WITH_NEW_PASSWORD_REQUIRED`
* — emitted when a user signs in for the first time with the temporary password
* issued by `issueInvitationCredentials`. The caller (AuthContext / LoginForm)
* switches to a "set new password" panel and calls `confirmNewPassword(...)`.
*/
pendingChallenge?: 'CONFIRM_SIGN_IN_WITH_NEW_PASSWORD_REQUIRED';
}
interface SignUpResult {
success: boolean;
requiresConfirmation: boolean;
error?: AuthError;
}
// Adapter to make localStorage/sessionStorage compatible with Amplify's KeyValueStorageInterface
function createStorageAdapter(storage: Storage) {
return {
setItem(key: string, value: string): Promise<void> {
return Promise.resolve(storage.setItem(key, value));
},
getItem(key: string): Promise<string | null> {
return Promise.resolve(storage.getItem(key));
},
removeItem(key: string): Promise<void> {
return Promise.resolve(storage.removeItem(key));
},
clear(): Promise<void> {
return Promise.resolve(storage.clear());
},
};
}
class AuthService {
/**
* Lazily ensure Amplify is configured, then return its auth module.
*
* Public-homepage performance (perf/public-homepage-followup #2): authService is reachable
* from the eager app root (AuthProvider), so a static `import 'aws-amplify/auth'` here would
* drag aws-amplify (~426 KB) onto every page including the anonymous homepage. Instead each
* method awaits this helper, which configures Amplify on first use and dynamically imports
* the auth module so it lands in a lazy chunk. AuthProvider/apiClient gate their callers on
* `hasCognitoSession()`, so anonymous visitors never reach here.
*/
private async amplifyAuth() {
await ensureAmplifyConfigured();
return import('aws-amplify/auth');
}
/**
* Configure session persistence based on "Remember me" preference
* @param rememberMe - localStorage (persistent) or sessionStorage (temporary)
*/
private async configureSessionPersistence(rememberMe: boolean): Promise<void> {
const { cognitoUserPoolsTokenProvider } = await import('aws-amplify/auth/cognito');
const storage = rememberMe ? localStorage : sessionStorage;
const storageAdapter = createStorageAdapter(storage);
cognitoUserPoolsTokenProvider.setKeyValueStorage(storageAdapter);
}
async signIn(credentials: LoginCredentials): Promise<SignInResult> {
// Acquire (and configure) Amplify before configuring storage so the rememberMe choice
// overrides ensureAmplifyConfigured()'s detect-based storage. `auth` is declared outside
// the try so the UserAlreadyAuthenticatedException retry path in catch can reuse it.
const {
signIn: amplifySignIn,
signOut: amplifySignOut,
fetchAuthSession,
} = await this.amplifyAuth();
await this.configureSessionPersistence(credentials.rememberMe || false);
try {
console.log('[authService] signIn called with email:', credentials.email);
console.log('[authService] Calling amplifySignIn');
const result = await amplifySignIn({
username: credentials.email,
password: credentials.password,
});
console.log('[authService] amplifySignIn result:', { nextStep: result.nextStep?.signInStep });
Iif (result.nextStep && result.nextStep.signInStep !== 'DONE') {
const step = result.nextStep.signInStep;
console.log('[authService] Sign-in next step:', step);
// Epic 11 bug fix 2026-05-19 — surface the FORCE_CHANGE_PASSWORD challenge
// distinctly so LoginForm can render an inline "set new password" panel.
// Previously this was bucketed as "mfaChallenge" + success=false, which
// looked identical to a generic auth failure to the caller and dropped the
// user with no path forward.
if (step === 'CONFIRM_SIGN_IN_WITH_NEW_PASSWORD_REQUIRED') {
return {
success: false,
pendingChallenge: 'CONFIRM_SIGN_IN_WITH_NEW_PASSWORD_REQUIRED',
};
}
return {
success: false,
mfaChallenge: {
challengeName: step,
challengeParameters: {},
session: '',
},
};
}
console.log('[authService] Fetching auth session');
const session = await fetchAuthSession();
const tokens = session.tokens;
console.log('[authService] Session tokens:', {
hasIdToken: !!tokens?.idToken,
hasAccessToken: !!tokens?.accessToken,
});
Iif (!tokens?.idToken) {
throw new Error('No ID token found in session');
}
const userContext = this.extractUserContextFromToken(
tokens.idToken.payload as unknown as CognitoTokenClaims
);
console.log('[authService] User context extracted:', {
userId: userContext.userId,
email: userContext.email,
role: userContext.role,
});
return {
success: true,
user: userContext,
accessToken: tokens.accessToken?.toString() || '',
};
} catch (error: unknown) {
console.error('[authService] Error during sign in:', error);
// Handle case where user is already signed in
const errorCode =
(error as { code?: string; name?: string }).code ||
(error as { code?: string; name?: string }).name;
Iif (errorCode === 'UserAlreadyAuthenticatedException') {
console.log('[authService] User already authenticated, signing out and retrying...');
try {
// Sign out the existing user
await amplifySignOut();
// Retry sign in
console.log('[authService] Retrying amplifySignIn after signout');
const retryResult = await amplifySignIn({
username: credentials.email,
password: credentials.password,
});
if (retryResult.nextStep && retryResult.nextStep.signInStep !== 'DONE') {
const step = retryResult.nextStep.signInStep;
if (step === 'CONFIRM_SIGN_IN_WITH_NEW_PASSWORD_REQUIRED') {
return {
success: false,
pendingChallenge: 'CONFIRM_SIGN_IN_WITH_NEW_PASSWORD_REQUIRED',
};
}
return {
success: false,
mfaChallenge: {
challengeName: step,
challengeParameters: {},
session: '',
},
};
}
const session = await fetchAuthSession();
const tokens = session.tokens;
if (!tokens?.idToken) {
throw new Error('No ID token found in session', { cause: error });
}
const userContext = this.extractUserContextFromToken(
tokens.idToken.payload as unknown as CognitoTokenClaims
);
console.log('[authService] Retry successful, user context:', {
userId: userContext.userId,
email: userContext.email,
role: userContext.role,
});
return {
success: true,
user: userContext,
accessToken: tokens.accessToken?.toString() || '',
};
} catch (retryError) {
console.error('[authService] Retry failed:', retryError);
const mappedError = this.mapCognitoError(retryError);
console.log('[authService] Mapped retry error:', mappedError);
return {
success: false,
error: mappedError,
};
}
}
const mappedError = this.mapCognitoError(error);
console.log('[authService] Mapped error:', mappedError);
return {
success: false,
error: mappedError,
};
}
}
/**
* Complete the `CONFIRM_SIGN_IN_WITH_NEW_PASSWORD_REQUIRED` challenge.
*
* Called when a user signs in for the first time with the temporary password
* issued by `issueInvitationCredentials` (CUMS, Story 11.E.2). Submits the
* organizer-chosen new password to Cognito; on success, Cognito flips the user
* to CONFIRMED + a permanent password, and we proceed exactly as a normal
* successful sign-in (fetch session, extract user context).
*
* Epic 11 bug fix 2026-05-19. Mirrors the post-success branch of `signIn`.
*/
async confirmNewPassword(newPassword: string): Promise<SignInResult> {
try {
console.log('[authService] confirmNewPassword called');
const { confirmSignIn: amplifyConfirmSignIn, fetchAuthSession } = await this.amplifyAuth();
const result = await amplifyConfirmSignIn({ challengeResponse: newPassword });
console.log('[authService] confirmSignIn result:', { nextStep: result.nextStep?.signInStep });
if (result.nextStep && result.nextStep.signInStep !== 'DONE') {
// Unexpected — confirming the FORCE_CHANGE_PASSWORD challenge should land at DONE.
// Surface as a generic error rather than silently dropping the user.
return {
success: false,
error: {
code: 'UNEXPECTED_NEXT_STEP',
message: `Unexpected next step after confirmNewPassword: ${result.nextStep.signInStep}`,
},
};
}
const session = await fetchAuthSession();
const tokens = session.tokens;
if (!tokens?.idToken) {
throw new Error('No ID token found in session');
}
const userContext = this.extractUserContextFromToken(
tokens.idToken.payload as unknown as CognitoTokenClaims
);
return {
success: true,
user: userContext,
accessToken: tokens.accessToken?.toString() || '',
};
} catch (error: unknown) {
console.error('[authService] Error during confirmNewPassword:', error);
const mappedError = this.mapCognitoError(error);
return {
success: false,
error: mappedError,
};
}
}
/**
* Sign up new user with Cognito
*/
async signUp(signUpData: SignUpData): Promise<SignUpResult> {
try {
// Validate password match
if (signUpData.password !== signUpData.confirmPassword) {
return {
success: false,
requiresConfirmation: false,
error: {
code: 'PASSWORD_MISMATCH',
message: 'Passwords do not match',
},
};
}
// ADR-001: Only send attributes allowed by Cognito writeAttributes configuration
// Cognito = authentication only; Database = user profile data
// See cognito-stack.ts:212-214 for writeAttributes configuration
const { signUp: amplifySignUp } = await this.amplifyAuth();
const result = await amplifySignUp({
username: signUpData.email,
password: signUpData.password,
options: {
userAttributes: {
email: signUpData.email,
// Store user profile data in preferences JSON (PostConfirmation Lambda will sync to DB)
'custom:preferences': JSON.stringify({
firstName: signUpData.firstName,
lastName: signUpData.lastName,
language: signUpData.language || 'en',
newsletterOptIn: signUpData.newsletterOptIn || false,
theme: 'light',
notifications: {
email: true,
sms: false,
push: true,
},
privacy: {
showProfile: true,
allowMessages: true,
},
}),
// Story 12.1 AC4: `custom:companyId` is no longer written at signup.
// Company is owned by `user_profiles.company_id` via the user-management
// path (ADR-003/004); post-confirmation.ts never reads custom:companyId.
},
},
});
return {
success: true,
requiresConfirmation: !result.isSignUpComplete,
};
} catch (error: unknown) {
return {
success: false,
requiresConfirmation: false,
error: this.mapCognitoError(error),
};
}
}
/**
* Get current authenticated user
*/
async getCurrentUser(): Promise<UserContext | null> {
try {
const { getCurrentUser: amplifyGetCurrentUser, fetchAuthSession } = await this.amplifyAuth();
await amplifyGetCurrentUser();
const session = await fetchAuthSession();
const tokens = session.tokens;
if (!tokens?.idToken) {
console.debug('[authService] No idToken found in session');
return null;
}
return this.extractUserContextFromToken(
tokens.idToken.payload as unknown as CognitoTokenClaims
);
} catch (error) {
console.debug(
'[authService] getCurrentUser failed:',
error instanceof Error ? error.message : String(error)
);
return null;
}
}
async signOut(): Promise<void> {
const { signOut: amplifySignOut } = await this.amplifyAuth();
await amplifySignOut();
}
/**
* Story 12.7 (SSO Phase 4): initiate Google federation via Amplify v6's hosted-UI
* redirect. `signInWithRedirect` navigates the browser to the Cognito hosted UI
* (using the dormant `loginWith.oauth` config in amplify.ts); on return, the
* `/auth/callback` route completes the session through the SAME hydration path as
* password login (ADR-010 D1 — federated sessions yield the same JWT shape). The
* promise normally does not resolve in-page (the browser navigates away); a
* redirect-initiation failure propagates so the caller can surface it (no swallow).
* `provider` is typed `'Google'` — the only supported provider per ADR-010 D2.
*/
async signInWithFederated(provider: 'Google'): Promise<void> {
const { signInWithRedirect } = await this.amplifyAuth();
await signInWithRedirect({ provider });
}
/**
* Story 12.8 finding F7 (2026-06-04): on `/auth/callback`, Amplify v6 performs the OAuth
* `?code=` → token exchange ASYNCHRONOUSLY after configure. Checking the session once
* races that exchange — and the premature "no session" verdict makes the callback page
* navigate to /login, which CANCELS the in-flight exchange. (Observed in prod right after
* the auth.batbern.ch custom-domain switch made the exchange a little slower: every
* federated login silently bounced back to /login while Cognito/DB provisioning had
* actually succeeded.)
*
* Waits — bounded — for the exchange to settle: resolves true on the Hub
* `signInWithRedirect`/`signedIn` event or as soon as tokens are present (a 500ms poll
* covers an event fired before the listener attached); resolves false on
* `signInWithRedirect_failure` or timeout. Never throws.
*
* Config-race fix (2026-06-05): the Hub listener is attached BEFORE `amplifyAuth()` —
* `ensureAmplifyConfigured()` inside it runs `Amplify.configure()`, which synchronously
* kicks off the OAuth code exchange. A fast exchange failure dispatches
* `signInWithRedirect_failure` immediately; attaching the listener afterwards (the old
* order) missed that event and burned the full timeout before surfacing the error.
*/
async waitForFederatedSession(timeoutMs = 15000): Promise<boolean> {
// Dynamic import keeps aws-amplify utils off the public-homepage bundle (same rationale
// as amplifyAuth()).
const { Hub } = await import('aws-amplify/utils');
return new Promise<boolean>((resolve) => {
let settled = false;
let poller: ReturnType<typeof setInterval> | undefined;
// `finish` closes over the const bindings below; it can only RUN after they are
// initialised (events/timers fire asynchronously), so the forward references are safe.
const finish = (ok: boolean) => {
Iif (settled) return;
settled = true;
unsubscribe();
clearTimeout(timer);
if (poller !== undefined) clearInterval(poller);
resolve(ok);
};
const unsubscribe = Hub.listen('auth', ({ payload }) => {
if (payload.event === 'signInWithRedirect' || payload.event === 'signedIn') {
finish(true);
} else if (Epayload.event === 'signInWithRedirect_failure') {
console.warn('[authService] signInWithRedirect_failure during callback processing');
finish(false);
}
});
const timer = setTimeout(() => finish(false), timeoutMs);
// Listener is live — NOW configure Amplify (triggers the code exchange) and start
// the token poll. A configure failure settles false instead of hanging to timeout.
void (async () => {
try {
const { fetchAuthSession } = await this.amplifyAuth();
Iif (settled) return;
const checkTokens = async () => {
try {
const session = await fetchAuthSession();
if (session.tokens?.idToken) {
finish(true);
}
} catch {
// Exchange still in flight (or transient) — keep waiting until event/timeout.
}
};
poller = setInterval(() => void checkTokens(), 500);
void checkTokens();
} catch (error) {
console.error('[authService] waitForFederatedSession: Amplify init failed', error);
finish(false);
}
})();
});
}
async refreshToken(): Promise<TokenRefreshResponse> {
try {
const { fetchAuthSession } = await this.amplifyAuth();
const session = await fetchAuthSession({ forceRefresh: true });
const tokens = session.tokens;
if (!tokens?.accessToken) {
return {
success: false,
accessToken: '',
expiresIn: 0,
error: {
code: 'NO_TOKEN',
message: 'No access token available',
},
};
}
const expiresIn = tokens.accessToken.payload.exp
? tokens.accessToken.payload.exp - Math.floor(Date.now() / 1000)
: 0;
return {
success: true,
accessToken: tokens.accessToken.toString(),
expiresIn,
};
} catch (error: unknown) {
return {
success: false,
accessToken: '',
expiresIn: 0,
error: this.mapCognitoError(error),
};
}
}
/**
* Check if JWT token is expired
*/
isTokenExpired(token: string): boolean {
try {
const parts = token.split('.');
if (parts.length !== 3) return true;
const payload = JSON.parse(atob(parts[1]));
const currentTime = Math.floor(Date.now() / 1000);
return payload.exp <= currentTime;
// eslint-disable-next-line @typescript-eslint/no-unused-vars
} catch (_error) {
return true;
}
}
/**
* Extract user context from Cognito ID token
* Story 1.2.6: Updated to read custom:role claim (ADR-001 migration)
*/
private extractUserContextFromToken(tokenPayload: CognitoTokenClaims): UserContext {
// Story 12.1 (ADR-001 "minimal target footprint"): company + preferences are
// business data owned by `user_profiles`, NOT identity/authorization, so they are
// no longer sourced from the token. `AuthContext.hydrateUserFromDb` fills `companyId`
// + `preferences` from GET /users/me. The token carries only identity (sub, email) +
// authorization (custom:role, custom:username).
//
// Default to a COMPLETE UserPreferences object (not `{}`): the type requires all
// fields and downstream consumers read `preferences.language`/`.theme` directly, so
// the contract must hold even when DB hydration is skipped (no `/users/me`
// preferences row) or fails transiently. Hydration overrides these with the DB
// values when available.
const preferences: UserPreferences = {
language: 'en',
theme: 'light',
notifications: { email: true, sms: false, push: true },
privacy: { showProfile: true, allowMessages: true },
};
// Extract roles from custom:role claim (singular)
// Format: "ORGANIZER,SPEAKER" -> ['organizer', 'speaker']
const rolesString = tokenPayload['custom:role'];
const roles: UserRole[] = rolesString
? rolesString.split(',').map((r) => r.trim().toLowerCase() as UserRole)
: [];
// Primary role is first in list, fallback to 'attendee' if empty
const primaryRole: UserRole = roles[0] || 'attendee';
// Story 1.16.2: Prefer custom:username (from database) over cognito:username (UUID)
// PreTokenGeneration Lambda sets custom:username from database user_profiles.username
const username = tokenPayload['custom:username'] || '';
return {
userId: tokenPayload.sub,
username, // Story 1.16.2: Public meaningful username (e.g., "john.doe")
email: tokenPayload.email,
emailVerified: tokenPayload.email_verified,
role: primaryRole,
roles: roles,
companyId: undefined, // Story 12.1: hydrated from GET /users/me (was custom:companyId)
companyName: tokenPayload['custom:companyName'] || undefined, // Story 8.0: resolved from JWT if present
preferences, // Story 12.1: hydrated from GET /users/me (was custom:preferences)
issuedAt: tokenPayload.iat,
expiresAt: tokenPayload.exp,
tokenId: tokenPayload.sub,
};
}
/**
* Map Cognito errors to application errors
*/
private mapCognitoError(error: unknown): AuthError {
const errorCode =
(error as { code?: string; name?: string }).code ||
(error as { code?: string; name?: string }).name ||
'UNKNOWN_ERROR';
switch (errorCode) {
case 'NotAuthorizedException':
case 'UserNotFoundException':
return {
code: 'INVALID_CREDENTIALS',
message: 'Invalid email or password',
};
case 'UserNotConfirmedException':
return {
code: 'USER_NOT_CONFIRMED',
message: 'Please confirm your email address',
};
case 'TooManyRequestsException':
return {
code: 'TOO_MANY_REQUESTS',
message: 'Too many attempts. Please try again later',
};
case 'InvalidPasswordException':
return {
code: 'INVALID_PASSWORD',
message: 'Password does not meet requirements',
};
case 'UsernameExistsException':
return {
code: 'EMAIL_EXISTS',
message: 'An account with this email already exists',
};
default:
return {
code: errorCode,
message: (error as { message?: string }).message || 'An unexpected error occurred',
};
}
}
}
export const authService = new AuthService();
|