opt-cc/static/src/app/app.component.ts

import {Component, HostListener, Inject, OnInit} from '@angular/core';
import {NavigationEnd, NavigationStart, Router} from '@angular/router';
import {LoginService} from './services/app-user-service/login-service';
import {PromotionService} from './services/army-management/promotion.service';
import {AwardingService} from './services/army-management/awarding.service';
import {RouteConfig} from './app.config';
import {DOCUMENT} from "@angular/common";

declare function require(url: string);

@Component({
  selector: 'app-root',
  templateUrl: 'app.component.html',
  styleUrls: ['app.component.css', 'style/load-indicator.css']
})
export class AppComponent implements OnInit {

  config = RouteConfig;

  loading = false;

  scrollTopVisible = false;

  scrollBtnVisibleVal = 100;

  version = 'v'.concat(require('./../../../package.json').version);

  constructor(public loginService: LoginService,
              private promotionService: PromotionService,
              private awardingService: AwardingService,
              private router: Router,
              @Inject(DOCUMENT) private document) {
    router.events.subscribe(event => {
      if (event instanceof NavigationStart) {
        this.loading = true;
      }
      if (event instanceof NavigationEnd) {
        this.loading = false;
        // scroll to top on route from army overview to user detail and back
        if (router.url.includes('overview')) {
          this.scrollToTop()
        }
      }
    });
  }

  @HostListener("window:scroll", [])
  onWindowScroll() {
    this.scrollTopVisible = document.body.scrollTop > this.scrollBtnVisibleVal
      || document.documentElement.scrollTop > this.scrollBtnVisibleVal;
  }


  ngOnInit() {
    if (this.loginService.hasPermission(2)) {
      const fraction = this.loginService.getCurrentUser().squad.fraction;
      this.promotionService.checkUnconfirmedPromotions(fraction);
      this.awardingService.checkUnprocessedAwards(fraction);
    }
  }

  logout() {
    this.loginService.logout();
    this.router.navigate([RouteConfig.overviewPath]);
    return false;
  }

  scrollToTop() {
    this.document.body.scrollTop = 0; // For Safari
    this.document.documentElement.scrollTop = 0; // For Chrome, Firefox, IE and Opera
  }

}