opt-cc/static/src/app/squads/edit-squad/edit-squad.component.ts

import {Component, ViewChild} from '@angular/core';
import {ActivatedRoute, Router} from '@angular/router';
import {NgForm} from '@angular/forms';
import {Squad} from '../../models/model-interfaces';
import {SquadService} from '../../services/army-management/squad.service';
import {Subscription} from 'rxjs/Subscription';
import {Fraction} from '../../utils/fraction.enum';


@Component({
  templateUrl: './edit-squad.component.html',
  styleUrls: ['./edit-squad.component.css', '../../style/entry-form.css', '../../style/overview.css']
})
export class EditSquadComponent {

  subscription: Subscription;

  squad: Squad = {name: '', fraction: '', sortingNumber: 0};

  fileList: FileList;

  saved = false;

  showImageError = false;

  showSuccessLabel = false;

  imagePreviewSrc;

  @ViewChild(NgForm) form: NgForm;

  readonly fraction = Fraction;

  constructor(private route: ActivatedRoute,
              private router: Router,
              private squadService: SquadService) {
  }

  ngOnInit() {
    this.subscription = this.route.params
                            .map(params => params['id'])
                            .filter(id => id !== undefined)
                            .flatMap(id => this.squadService.getSquad(id))
                            .subscribe(squad => {
                              this.squad = squad;
                              this.imagePreviewSrc = 'resource/squad/' + this.squad._id + '.png?' + Date.now();
                            });
  }

  ngOnDestroy() {
    this.subscription.unsubscribe();
  }

  fileChange(event) {
    if (!event.target.files[0].name.endsWith('.png')) {
      this.showImageError = true;
      this.fileList = undefined;
    } else {
      this.showImageError = false;
      this.fileList = event.target.files;
    }
  }

  saveSquad(fileInput) {
    let file: File;
    if (!this.squad._id) {
      if (this.fileList) {
        file = this.fileList[0];
        this.squadService.submitSquad(this.squad, file)
            .subscribe(rank => {
              this.saved = true;
              this.router.navigate(['..'], {relativeTo: this.route});
            });
      } else {
        return window.alert(`Bild ist ein Pflichtfeld`);
      }
    } else {
      if (this.fileList) {
        file = this.fileList[0];
      }
      delete this.squad['__v'];
      this.squadService.submitSquad(this.squad, file)
          .subscribe(rank => {
            setTimeout(() => {
              this.imagePreviewSrc = 'resource/squad/' + this.squad._id + '.png?' + Date.now();
            }, 300);
            fileInput.value = '';
            this.showSuccessLabel = true;
            setTimeout(() => {
              this.showSuccessLabel = false;
            }, 2000)
          })
    }
  }

  cancel() {
    this.router.navigate([this.squad._id ? '../..' : '..'], {relativeTo: this.route});
    return false;
  }

  canDeactivate(): boolean {
    if (this.saved || !this.form.dirty) {
      return true;
    }
    return window.confirm(`Ihr Formular besitzt ungespeicherte Änderungen, möchten Sie die Seite wirklich verlassen?`);
  }

}