(Fork of https://github.com/ngrx/example-app)

Starting with the "Books" demo application for ngrx, add authenticated protection to the application so a user cannot access books or collections without valid credentials.

• The following components should be protected (these are components that currently have routes)
  • CollectionPageComponent - as this is currently the root route (path: '') it should be moved to /collection
  • FindBookPageComponent
  • ViewBookPageComponent
• If a user attempts to access a protected route, they should be redirected to the login page
• Once the user is logged in, they should see the phrase Logged In as ${username} in the toolbar
• If the user is logged in, and they load the / route, they should be redirected to the /collection page
• The authentication service should simply be a stub that checks if the submitted password is password. For example:

  /**
   * Asynchronously authenticate with a remote service
   * @todo(*) actually authenticate
   */
  public authenticate(username: string, password: string): Observable<boolean> {

    if (password === 'password') {
      console.info(`Logged in as ${username}`);
      return Observable.of(true);
    }

    console.info(`Access denied for ${username} (Incorrect password)`);

    return Observable.of(false);
  }

• The login state should be persisted to the browser database (see src/app/effects/collection.ts for an example) so page refreshes result in the user still being logged in
• If the user attempts to visit a protected page, after they are redirected AND successfully log in, they should be redirected back to the page that they were first attempting to visit

• Write tests for the service/guard/reducer/component