Automattic / jetpack

	 */

	protected $buffer;

	public function __construct( $item_limit, $byte_limit, $time = '1970-01-01 00:00:00' ) {

		$this->is_full_flag = false;

		$this->is_empty_flag = true;

		$this->timestamp = $time;

		$this->finder = new Jetpack_Sitemap_Finder();

		$this->item_capacity = max( 1, intval( $item_limit ) );

		$this->byte_capacity = max( 1, intval( $byte_limit ) ) - strlen( $this->contents() );

	}

	/**

	 * Append an item to the buffer, if there is room for it,

	 * @param int    $byte_limit The maximum size of the buffer in bytes.

	 * @param string $time The initial datetime of the buffer. Must be in 'YYYY-MM-DD hh:mm:ss' format.

	 */

	public function __construct( $item_limit, $byte_limit, $time ) {

		$this->is_full_flag = false;

		$this->timestamp = $time;

		$this->finder = new Jetpack_Sitemap_Finder();

		$this->doc = new DOMDocument( '1.0', 'UTF-8' );

		$this->item_capacity = max( 1, intval( $item_limit ) );

		$this->byte_capacity = max( 1, intval( $byte_limit ) ) - strlen( $this->doc->saveXML() );

	}

	/**

	 * Returns a DOM element that contains all sitemap elements.