🔒️ Add expiration check of token

src/app/services/localstorage.service.ts

@@ -1,19 +1,32 @@
 import { Injectable } from '@angular/core';
+import { Router } from '@angular/router';
 
 @Injectable({
   providedIn: 'root',
 })
 export class LocalStorageService {
   private readonly AUTH_TOKEN_KEY = 'auth_token';
-  private readonly IS_ADMIN_KEY = 'isAdmin';
+  private readonly USERNAME_KEY = 'username';
+  private readonly IS_ADMIN_KEY = 'is_admin';
 
-  constructor() {}
+  constructor(private router: Router) {}
 
   setToken(token: string): void {
     localStorage.setItem(this.AUTH_TOKEN_KEY, token);
   }
 
   getToken(): string | null {
+    // Check if token is expired
+    const token = localStorage.getItem(this.AUTH_TOKEN_KEY);
+    if (token) {
+      const payload = JSON.parse(atob(token.split('.')[1]));
+      const expirationDate = new Date(payload.exp * 1000);
+      if (expirationDate < new Date()) {
+        this.removeToken(); // Remove expired token
+        this.router.navigate(['/login']);
+        return null;
+      }
+    }
     return localStorage.getItem(this.AUTH_TOKEN_KEY);
   }
 
@@ -21,6 +34,18 @@ export class LocalStorageService {
     localStorage.removeItem(this.AUTH_TOKEN_KEY);
   }
 
+  setUsername(username: string): void {
+    localStorage.setItem(this.USERNAME_KEY, username);
+  }
+
+  getUsername(): string | null{
+    return localStorage.getItem(this.USERNAME_KEY);
+  }
+
+  removeUsername(): void {
+    localStorage.removeItem(this.USERNAME_KEY);
+  }
+
   setIsAdmin(isAdmin: boolean): void {
     localStorage.setItem(this.IS_ADMIN_KEY, isAdmin.toString());
   }