<?php
namespace ContentNation\ActivityPub\Common;

require_once("OrderedCollection.php");
class OrderedCollectionPage extends OrderedCollection {
  private string $next = '';
  private string $prev = '';
  private string $partOf = '';


  public function __construct() {
    parent::__construct();
    parent::addContext('https://www.w3.org/ns/activitystreams');
  }

  /**
   * convert internal state to php array
   * @return array<string,mixed>
   */
  public function toObject() {
    $return = parent::toObject();
    if ($this->next !== '') {
      $return['next'] = $this->next;
    }
    if ($this->prev !== '') {
      $return['prev'] = $this->prev;
    }
    if ($this->partOf !== '') {
      $return['partOf'] = $this->partOf;
    }
    return $return;
  }

  /**
   * create object from json
   * @param array<string,mixed> $json input json
   * @return bool true on success
   */
  public function fromJson($json) : bool {
    return parent::fromJson($json);
  }

  public function setNext(string $url) : void {
    $this->next = $url;
  }

  public function setPrev(string $url) : void {
    $this->prev = $url;
  }

  public function setPartOf(string $url) : void {
    $this->partOf = $url;
  }

}