Trim gitignore

[rbdr/serpentity] / lib / serpentity / entity.js

/*
 * The entity gives the entity framework its name. It exists only
 * to hold components.
 */

export class Entity {
  constructor(config) {

    this._componentKeys = [];
    this._components = [];

    Object.assign(this, config);
  }

  /*
   * Adds a component to the entity.
   *
   * returns true if added, false if already present
   */
  addComponent(component) {

    if (this._componentKeys.indexOf(component.constructor) >= 0) {
      return false;
    }

    this._componentKeys.push(component.constructor);
    this._components.push(component);
    return true;
  }

  /*
   * returns true if component is included, false otherwise
   */
  hasComponent(componentClass) {

    if (this._componentKeys.indexOf(componentClass) >= 0) {
      return true;
    }

    return false;
  }

  /*
   * returns the component associated with that key
   */
  getComponent(componentClass) {

    const position = this._componentKeys.indexOf(componentClass);
    if (position >= 0) {
      return this._components[position];
    }
  }
}