thumbnail.component.ts

import { Component, Input, OnInit } from '@angular/core';
import { Bitstream } from '../core/shared/bitstream.model';
import { hasValue } from '../shared/empty.util';

/**
 * This component renders a given Bitstream as a thumbnail.
 * One input parameter of type Bitstream is expected.
 * If no Bitstream is provided, a holderjs image will be rendered instead.
 */

@Component({
  selector: 'ds-thumbnail',
  styleUrls: ['./thumbnail.component.scss'],
  templateUrl: './thumbnail.component.html'
})
export class ThumbnailComponent implements OnInit {

  @Input() thumbnail: Bitstream;

  /**
   * The default 'holder.js' image
   */
  @Input() defaultImage? = 'data:image/svg+xml;charset=UTF-8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2293%22%20height%3D%22120%22%20viewBox%3D%220%200%2093%20120%22%20preserveAspectRatio%3D%22none%22%3E%3C!--%0ASource%20URL%3A%20holder.js%2F93x120%3Ftext%3DNo%20Thumbnail%0ACreated%20with%20Holder.js%202.8.2.%0ALearn%20more%20at%20http%3A%2F%2Fholderjs.com%0A(c)%202012-2015%20Ivan%20Malopinsky%20-%20http%3A%2F%2Fimsky.co%0A--%3E%3Cdefs%3E%3Cstyle%20type%3D%22text%2Fcss%22%3E%3C!%5BCDATA%5B%23holder_1543e460b05%20text%20%7B%20fill%3A%23AAAAAA%3Bfont-weight%3Abold%3Bfont-family%3AArial%2C%20Helvetica%2C%20Open%20Sans%2C%20sans-serif%2C%20monospace%3Bfont-size%3A10pt%20%7D%20%5D%5D%3E%3C%2Fstyle%3E%3C%2Fdefs%3E%3Cg%20id%3D%22holder_1543e460b05%22%3E%3Crect%20width%3D%2293%22%20height%3D%22120%22%20fill%3D%22%23FFFFFF%22%2F%3E%3Cg%3E%3Ctext%20x%3D%2235.6171875%22%20y%3D%2257%22%3ENo%3C%2Ftext%3E%3Ctext%20x%3D%2210.8125%22%20y%3D%2272%22%3EThumbnail%3C%2Ftext%3E%3C%2Fg%3E%3C%2Fg%3E%3C%2Fsvg%3E';

  src: string;
  errorHandler(event) {
    event.currentTarget.src = this.defaultImage;
  }

  ngOnInit(): void {
      if (hasValue(this.thumbnail) && this.thumbnail.content) {
        this.src = this.thumbnail.content;
      } else {
        this.src = this.defaultImage
      }
  }

}