feat(auth): implement role-based dashboard redirect

apps/web/src/services/firestoreService.ts

@@ -0,0 +1,55 @@
+import { getFirestore, doc, getDoc } from "firebase/firestore";
+import { app } from "../features/auth/firebase";
+
+export interface UserData {
+  id: string;
+  email: string;
+  fullName?: string;
+  userRole: "admin" | "client" | "vendor";
+  photoURL?: string;
+}
+
+const db = getFirestore(app);
+
+/**
+ * Fetch user data from Firestore including their role
+ * @param uid - Firebase User UID
+ * @returns UserData object with role information
+ */
+export const fetchUserData = async (uid: string): Promise<UserData | null> => {
+  try {
+    const userDocRef = doc(db, "users", uid);
+    const userDocSnap = await getDoc(userDocRef);
+
+    if (userDocSnap.exists()) {
+      const data = userDocSnap.data();
+      return {
+        id: uid,
+        email: data.email || "",
+        fullName: data.fullName,
+        userRole: data.userRole || "client",
+        photoURL: data.photoURL,
+      };
+    }
+
+    return null;
+  } catch (error) {
+    console.error("Error fetching user data from Firestore:", error);
+    throw error;
+  }
+};
+
+/**
+ * Get the dashboard path for a given user role
+ * @param userRole - The user's role
+ * @returns The appropriate dashboard path
+ */
+export const getDashboardPath = (userRole: string): string => {
+  const roleMap: Record<string, string> = {
+    admin: "/dashboard/admin",
+    client: "/dashboard/client",
+    vendor: "/dashboard/vendor",
+  };
+
+  return roleMap[userRole.toLowerCase()] || "/dashboard/client";
+};