feat: change Auth Storage

wip: need to refactor

#128

src/cert/AuthStorage.ts

@@ -1,8 +1,28 @@
 const AUTH = 'auth';
 
-export function saveAuth(token: { id: string; url: string }) {
-  localStorage.setItem(AUTH, JSON.stringify(token));
+export function saveAuth(token: string) {
+  const decoded = decodeToken(token);
+  let userData: { id: string; url: string };
+  userData = { id: decoded.username, url: decoded.imageUrl };
+  localStorage.setItem(AUTH, JSON.stringify(userData));
 }
 export function getAuth(): { id: string; url: string } {
   return JSON.parse(localStorage.getItem(AUTH));
 }
+
+export function removeAuth() {
+  localStorage.removeItem(AUTH);
+}
+
+const decodeToken = (token: string) => {
+  const base64Url = token.split('.')[1];
+  const base64 = base64Url.replace(/-/g, '+').replace(/_/g, '/');
+  const jsonPayload = decodeURIComponent(
+    atob(base64)
+      .split('')
+      .map((c) => '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2))
+      .join(''),
+  );
+
+  return JSON.parse(jsonPayload);
+};