import Schema from '@/ecs/schema.js';

export default function(Component) {
  return class Emitter extends Component {
    mergeDiff(original, update) {
      const merged = {};
      if (update.emit) {
        merged.emit = {
          ...original.emit,
          ...update.emit,
        }
      }
      return merged;
    }
    instanceFromSchema() {
      const Component = this;
      const Instance = super.instanceFromSchema();
      return class EmitterInstance extends Instance {
        emitting = [];
        id = 0;
        emit(specification) {
          Component.markChange(this.entity, 'emit', {[this.id++]: specification});
        }
      };
    }
    static schema = new Schema({
      type: 'object',
      properties: {},
    });
  }
}