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   1  <?php
   2  /*
   3   * Limb PHP Framework
   4   *
   5   * @link http://limb-project.com 
   6   * @copyright  Copyright &copy; 2004-2007 BIT(http://bit-creative.com)
   7   * @license    LGPL http://www.gnu.org/copyleft/lesser.html 
   8   */
   9  lmb_require('limb/datetime/src/lmbDate.class.php');
  10  lmb_require('limb/core/src/exception/lmbException.class.php');
  11  
  12  /**

  13   * class lmbDatePeriod.

  14   *

  15   * @package datetime

  16   * @version $Id: lmbDatePeriod.class.php 5945 2007-06-06 08:31:43Z pachanga $

  17   */
  18  class lmbDatePeriod
  19  {
  20    var $start;
  21    var $end;
  22  
  23    function __construct($start, $end)
  24    {
  25      $this->start = (is_object($start)) ? $start : new lmbDate($start);
  26      $this->end = (is_object($end)) ? $end : new lmbDate($end);
  27  
  28      if($this->end->isBefore($this->start))
  29        throw new lmbException('wrong period interval', array('start' => $this->start->toString(),
  30                                                               'end' => $this->end->toString()));
  31    }
  32  
  33    function toString()
  34    {
  35      return $this->start->toString() . ' - ' . $this->end->toString();
  36    }
  37  
  38    function getDuration()
  39    {
  40      return $this->end->getStamp() - $this->start->getStamp();
  41    }
  42  
  43    function getStart()
  44    {
  45      return $this->start;
  46    }
  47  
  48    function getEnd()
  49    {
  50      return $this->end;
  51    }
  52  
  53    function isEqual($period)
  54    {
  55      return $this->start->isEqual($period->getStart()) &&
  56             $this->end->isEqual($period->getEnd());
  57    }
  58  
  59    function includes($period)
  60    {
  61      return ($this->start->isBefore($period->getStart()) &&
  62              $this->end->isAfter($period->getEnd()));
  63    }
  64  
  65    function isInside($period)
  66    {
  67      return $period->includes($this);
  68    }
  69  
  70    function intersects($period)
  71    {
  72      return $this->isEqual($period)
  73             ||
  74             ($this->start->isBefore($period->getStart()) && $this->end->isAfter($period->getStart()))
  75             ||
  76             ($this->start->isAfter($period->getStart()) && $this->start->isBefore($period->getEnd()));
  77    }
  78  }
  79  
  80  ?>