Questions[angular2-template]

I am analyzing how to start a project with Angular.

In a previous one, which we currently have running, assembled with AngularJS 1.5, with a structure similar to the one I'm looking for, which is a login screen, which, if the user exists, takes you to a website.

This was structured with an abstract template, which has 2 children, one for the login and the other for the menu template, which is used throughout the internal structure of the web.

I have the doubt that in Angular 4 the project should not be structured like this. Can you give me a hand on how to set up this structure?

I am editing a record from a list, clicking on it opens this record in a modal with user information to edit, so far so good.

My drawback is that inside the modal I am loading a service that depends on the selected user, I execute this function in the OnInitmodal but since the modal loads in my main component when I open the modal that service is empty since it was executed when loading the component main and not when loading the modal.

How could I make my function run when I open the modal and not when the component loads?

Note: the modal is in a component and my list of records in another component

Main Template:

 <app-modal modalId="editUser" modalSize="modal-lg" modalTitle="Editar Usuario - {{user.userId}}" modalIcon="ion-ios-person-outline">
  <app-edit-user [user]="user"></app-edit-user>
</app-modal>

Main component (from here I call my modal):

 onRowSelect(event) {
   this.newUser = false;
   this.user = this.cloneUser(event.data);
   $("#editUser").modal();
  }

Component Modal

  getParameters(user){
    console.log(user);
    this._userService.getParameter(user).subscribe(
      response => {
      this.userParameter = response.pagedResult.resultado;
      console.log(this.userParameter);
    }, 
      error => {
        console.log(<any>error);
      }
    );
  }

 // Desde aqui llamo la función pero como se ejecuta al cargar el componente los datos siempre vienen vacios

  ngOnInit() {
    console.log(this.user.userId);
    this.getParameters(this.user.userId);
  }

I'm trying to use something similar to interpolateProviderin AngularJS 2but I can't find something similar to this:

AngularJS 1.x $interpolateProvider

$interpolateProvider.startSymbol('//');
$interpolateProvider.endSymbol('//');

Looking at the documentation for AngularJS 2I couldn't find anything like the above.