export class Synchronizer {

  constructor(children) {
    this.children = children;
    this.childrenPacketsForUpdate = this.children.map((child) => {
      return child.packetsForUpdate.bind(child);
    });
  }

  acceptPacket(packet) {
    for (let i = 0; i < this.children.length; i++) {
      this.children[i].acceptPacket(packet);
    }
  }

  addChild(child) {
    this.children.push(child);
    this.childrenPacketsForUpdate.push(child.packetsForUpdate.bind(child));
  }

  packetsForUpdate(force = false) {
    const packetsForUpdate = [];
    for (let i = 0; i < this.childrenPacketsForUpdate.length; i++) {
      const childPacketsForUpdate = this.childrenPacketsForUpdate[i](force);
      for (let j = 0; j < childPacketsForUpdate.length; j++) {
        packetsForUpdate.push(childPacketsForUpdate[j]);
      }
    }
    return packetsForUpdate;
  }

}