mirador/src/lib/AnnotationList.js

An open-source, web-based 'multi-up' viewer that supports zoom-pan-rotate functionality, ability to display/compare simple images, and images with annotations.

import flatten from 'lodash/flatten';
import AnnotationResource from './AnnotationResource';
/** */
export default class AnnotationList {
  /** */
  constructor(json, target) {
    this.json = json;
    this.target = target;
  }

  /** */
  get id() {
    return this.json['@id'];
  }

  /** */
  present() {
    return (this.resources
      && this.resources.length > 0);
  }

  /** */
  get resources() {
    this._resources = this._resources || (() => { // eslint-disable-line no-underscore-dangle
      if (!this.json || !this.json.resources) return [];

      return flatten([this.json.resources]).map(resource => new AnnotationResource(resource));
    })();
    return this._resources; // eslint-disable-line no-underscore-dangle
  }
}