organize services into services folder

src/app/services/cookie.service.ts

@@ -0,0 +1,35 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class CookieService {
+
+  constructor() { }
+
+  getCookie(name: string): string {
+    let ca: Array<string> = document.cookie.split(';');
+    let caLen: number = ca.length;
+    let cookieName = `${name}=`;
+    let c: string;
+
+    for (let i: number = 0; i < caLen; i += 1) {
+      c = ca[i].replace(/^\s+/g, '');
+      if (c.indexOf(cookieName) == 0) {
+        return c.substring(cookieName.length, c.length);
+      }
+    }
+    return '';
+  }
+
+  deleteCookie(name): void {
+    this.setCookie(name, "", -1);
+  }
+
+  setCookie(name: string, value: string, expireDays: number, path: string = ""): void {
+    let d: Date = new Date();
+    d.setTime(d.getTime() + expireDays * 24 * 60 * 60 * 1000);
+    let expires: string = "expires=" + d.toUTCString();
+    document.cookie = name + "=" + value + "; " + expires + (path.length > 0 ? "; path=" + path : "");
+  }
+}