Full Project upgrade

src/app/services/local-storage.service.ts

@@ -0,0 +1,34 @@
+import { Injectable } from '@angular/core';
+import * as CryptoJS from 'crypto-js';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class LocalStorageService {
+  private key = "AngularFirebaseVotingAPP_Key@0";
+
+  constructor() { }
+  public saveData(key: string, value: string) {
+    localStorage.setItem(key, this.encrypt(value));
+  }
+
+  public getData(key: string) {
+    let data = localStorage.getItem(key)|| "";
+    return this.decrypt(data);
+  }
+  public removeData(key: string) {
+    localStorage.removeItem(key);
+  }
+
+  public clearData() {
+    localStorage.clear();
+  }
+
+  private encrypt(txt: string): string {
+    return CryptoJS.AES.encrypt(txt, this.key).toString();
+  }
+
+  private decrypt(txtToDecrypt: string) {
+    return CryptoJS.AES.decrypt(txtToDecrypt, this.key).toString(CryptoJS.enc.Utf8);
+  }
+}