class_EntrySortIterator.inc

<?php
/*
  This code is part of FusionDirectory (http://www.fusiondirectory.org/)
  Copyright (C) 2003-2010  Cajus Pollmeier
  Copyright (C) 2011-2018  FusionDirectory

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/

class EntrySortIterator implements Iterator
{
  protected $data;

  public function __construct (array $entries, Column $column = NULL, bool $direction = FALSE)
  {
    // Sort for attribute
    if (is_object($column)) {
      uasort(
        $entries,
        function ($ao, $bo) use ($column)
        {
          return $column->compare($ao, $bo);
        }
      );
    }

    // Invert if direction is set
    if ($direction) {
      $this->data = array_reverse($entries, TRUE);
    } else {
      $this->data = $entries;
    }
  }

  function rewind ()
  {
    reset($this->data);
  }

  function current ()
  {
    return current($this->data);
  }

  function key ()
  {
    return key($this->data);
  }

  function next ()
  {
    next($this->data);
  }

  function valid ()
  {
    return (key($this->data) !== NULL);
  }
}