apps/image-editor/src/js/command/addObject.js

import commandFactory from '@/factory/command';
import { commandNames, rejectMessages } from '@/consts';

const command = {
  name: commandNames.ADD_OBJECT,

  /**
   * Add an object
   * @param {Graphics} graphics - Graphics instance
   * @param {Object} object - Fabric object
   * @returns {Promise}
   */
  execute(graphics, object) {
    return new Promise((resolve, reject) => {
      if (!graphics.contains(object)) {
        graphics.add(object);
        resolve(object);
      } else {
        reject(rejectMessages.addedObject);
      }
    });
  },

  /**
   * @param {Graphics} graphics - Graphics instance
   * @param {Object} object - Fabric object
   * @returns {Promise}
   */
  undo(graphics, object) {
    return new Promise((resolve, reject) => {
      if (graphics.contains(object)) {
        graphics.remove(object);
        resolve(object);
      } else {
        reject(rejectMessages.noObject);
      }
    });
  },
};

commandFactory.register(command);

export default command;