feat(auth): implement email/password login form

apps/web/src/services/authService.ts

@@ -0,0 +1,106 @@
+import {
+  signInWithEmailAndPassword,
+  signOut,
+  onAuthStateChanged,
+  setPersistence,
+  browserLocalPersistence,
+  sendPasswordResetEmail,
+} from "firebase/auth";
+import type { User, AuthError } from "firebase/auth";
+import { app} from "../features/auth/firebase"
+import { getAuth } from "firebase/auth";
+
+const auth = getAuth(app);
+
+/**
+ * Initialize Firebase Auth persistence
+ * Ensures user session persists across page refreshes
+ */
+export const initializeAuthPersistence = async () => {
+  try {
+    await setPersistence(auth, browserLocalPersistence);
+  } catch (error) {
+    console.error("Error setting auth persistence:", error);
+  }
+};
+
+/**
+ * Login user with email and password
+ */
+export const loginWithEmail = async (email: string, password: string) => {
+  try {
+    const userCredential = await signInWithEmailAndPassword(auth, email, password);
+    return {
+      success: true,
+      user: userCredential.user,
+      error: null,
+    };
+  } catch (error) {
+    const authError = error as AuthError;
+    return {
+      success: false,
+      user: null,
+      error: getAuthErrorMessage(authError.code),
+    };
+  }
+};
+
+/**
+ * Sign out the current user
+ */
+export const logout = async () => {
+  try {
+    await signOut(auth);
+    return { success: true };
+  } catch (error) {
+    return { success: false, error: (error as Error).message };
+  }
+};
+
+/**
+ * Send password reset email
+ */
+export const sendPasswordReset = async (email: string) => {
+  try {
+    await sendPasswordResetEmail(auth, email);
+    return { success: true };
+  } catch (error) {
+    const authError = error as AuthError;
+    return { success: false, error: getAuthErrorMessage(authError.code) };
+  }
+};
+
+/**
+ * Subscribe to auth state changes
+ * Returns unsubscribe function
+ */
+export const subscribeToAuthState = (callback: (user: User | null) => void) => {
+  return onAuthStateChanged(auth, callback);
+};
+
+/**
+ * Get current user synchronously
+ */
+export const getCurrentUser = () => {
+  return auth.currentUser;
+};
+
+/**
+ * Convert Firebase error codes to user-friendly messages
+ */
+const getAuthErrorMessage = (errorCode: string): string => {
+  const errorMessages: Record<string, string> = {
+    "auth/invalid-email": "Invalid email address format.",
+    "auth/user-disabled": "This user account has been disabled.",
+    "auth/user-not-found": "Invalid email or password.",
+    "auth/wrong-password": "Invalid email or password.",
+    "auth/invalid-credential": "Invalid email or password.",
+    "auth/too-many-requests": "Too many login attempts. Please try again later.",
+    "auth/operation-not-allowed": "Login is currently disabled. Please try again later.",
+    "auth/network-request-failed": "Network error. Please check your connection.",
+  };
+
+  return errorMessages[errorCode] || "An error occurred during login. Please try again.";
+};
+export { app };
+