import {Container, Sprite} from '@avocado/graphics';

export class EntityListView extends Container {

  constructor(entityList) {
    super();
    this.entityList = entityList;
    entityList.on('entityAdded', this.onListEntityAdded, this);
    entityList.on('entityRemoved', this.onListEntityRemoved, this);
    for (const entity of entityList) {
      this.onListEntityAdded(entity);
    }
  }

  onListEntityAdded(entity) {
    entity.hydrate();
    if (entity.is('visible')) {
      this.addChild(entity.container);
    }
  }

  onListEntityRemoved(entity) {
    if (entity.is('visible')) {
      this.removeChild(entity.container);
    }
  }

}