avocado-old/packages/behavior/item/collection.js

import {fromJSON as behaviorItemFromJSON} from './registry';

export function Collection(type) {
  const plural = `${type}s`;
  return class Collection {

    constructor() {
      this[plural] = [];
    }

    count() {
      return this[plural].length;
    }

    fromJSON(json) {
      this[plural] = [];
      for (const item of json) {
        this[plural].push(behaviorItemFromJSON(item));
      }
      return this;
    }

    toJSON() {
      return this[plural].map((item) => item.toJSON());
    }
  };
}