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- <?php
- /**
- * Handle standard OSInet date code strings, uppercase
- * format: [y]ymdd
- * 4-characters until 2009-12-31, 5 afterwards
- *
- * $Id: u_date_code.php,v 1.3 2007-04-29 15:40:29 marand Exp $
- */
- require_once('misc.php'); // needed for "iComparable" interface
- require_once('boxed_scalars.php'); // needed to sign-compare ints
- class osinet_date_code implements iComparable
- {
- private $f_value;
- /**
- * Implements iComparable restrictively, only comparing to other osinet_date_code
- * objects, not to any other class implementing iComparable
- *
- */
- public function cmp(iComparable $other)
- {
- if (!($other instanceof osinet_date_code))
- throw new Exception('osinet_date_code only compares to other osinet_date_code objects');
- $ar_d1 = $this->to_mkdate();
- $d1 = new boxed_int($ar_d1['mday']);
- $m1 = new boxed_int($ar_d1['mon']) ;
- $y1 = new boxed_int($ar_d1['year']);
- $ar_d2 = $other->to_mkdate();
- $d2 = new boxed_int($ar_d2['mday']);
- $m2 = new boxed_int($ar_d2['mon']) ;
- $y2 = new boxed_int($ar_d2['year']);
- $ret = $y1->cmp($y2);
- if ($ret)
- return $ret;
- else // same year
- {
- $ret = $m1->cmp($m2);
- if ($ret)
- return $ret;
- else // same year and month
- {
- $ret = $d1->cmp($d2);
- return $ret;
- }
- }
- }
- /**
- * Generate an mkdate()-like array for a date code
- *
- * @param string $date_code
- * @return array ['mday', 'mon', 'year']
- */
- public function to_mkdate()
- {
- $date_code = strtoupper($this->f_value);
- $matches = array();
- preg_match('/^([0-9]*)([A-Z])([0-9]?.*$)/', $date_code, $matches);
- if (count($matches) <> 4)
- {
- throw new Exception("Incorrect date code $date_code");
- }
- $ret = array(
- 'mday' => $matches[3],
- 'mon' => ord($matches[2]) - ord('@'),
- 'year' => 2000 + $matches[1],
- );
- return $ret;
- }
- public function __construct($time = null)
- {
- date_default_timezone_set('Europe/Paris');
- if (!$time)
- $time = time();
- $date = getdate();
- $day = $date['mday'];
- $month = $date['mon'];
- $year = $date['year'] % 100;
- $month = chr(ord('@') + $month);
- $this->f_value = sprintf('%d%s%02d', $year, $month, $day);
- }
- private function set_value($date_code)
- {
- $date_code = strtoupper($date_code);
- $matches = array();
- preg_match('/^([0-9]*)([A-Z])([0-9]?.*$)/', $date_code, $matches);
- if (count($matches) <> 4)
- {
- throw new Exception("Incorrect date code $date_code");
- }
- else
- $this->f_value = $date_code;
- }
- protected function __get($nm)
- {
- // echo "osinet_date_code::__get($nm)\n";
- if ($nm <> 'value')
- throw new Exception("$nm: undefined property for " . get_class($this));
- return $this->f_value;
- }
- private function __set($nm, $val)
- {
- if ($nm <> 'value')
- throw new Exception("$nm: undefined property for " . get_class($this));
- $this->set_value($val);
- }
- }
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