add inactivity page

src/app/services/inativity.service.ts

@@ -0,0 +1,35 @@
+import { Injectable } from '@angular/core';
+import { Router } from '@angular/router';
+import { SessionStore } from '../store/session.service';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class InativityService {
+
+  constructor(
+    private router: Router,
+  ) { 
+
+    var t;
+    window.onload = resetTimer;
+    window.onmousemove = resetTimer;
+    window.onmousedown = resetTimer;  // catches touchscreen presses as well      
+    window.ontouchstart = resetTimer; // catches touchscreen swipes as well 
+    window.onclick = resetTimer;      // catches touchpad clicks as well
+    window.onkeydown = resetTimer;   
+    window.addEventListener('scroll', resetTimer, true); // improved; see comments
+
+    function userIsNotActive() {
+      // your function for too long inactivity goes here
+      SessionStore.setInativity(false)
+      // alert('go out')
+      window['inactivity/function']()
+    }
+
+    function resetTimer() {
+      clearTimeout(t);
+      t = setTimeout(userIsNotActive, 60000);  // time is in milliseconds
+    }
+  }
+}