calendar.class.inc.php

<?php
/*
 * Calendar class to print out an HTML calendar.
 *
 * Usage:
 *   $calendar = new Calendar();
 *   $calendar->addEvent(2009, 8, 13, '/foo');
 *   $calendar->addEvent(2009, 8, 28, '/bar', 'After the foo comes the bar');
 *   $calendar->printMonth(2009, 8);
 */

class CalendarDay {
  function __construct($stamp, $event = null) {
    $this->stamp = $stamp;
    $this->event = $event;
  }
  function isToday() {
    return date('Y-m-d', $this->stamp) == date('Y-m-d');
  }
  function isMonth($m) {
    return intval($m) == intval(date('n', $this->stamp));
  }
  function date($format) {
    return date($format, $this->stamp);
  }
}

class Calendar {
  function __construct() {}

  function addEvent($year, $month, $day, $uri, $title = '') {
    $date = $this->ansi_mktime($year, $month, $day);
    $this->events[date('Y-m-d', $date)] = array('uri' => $uri, 'title' => $title);
  }

  function eventFor($date) {
    return $this->events[date('Y-m-d', $date)];
  }

  function ansi_mktime($year, $month = 1, $day = 1, $hour = 0, $minute = 0, $second = 0) {
    return mktime($hour, $minute, $second, $month, $day, $year);
  }

  // Return array of weeks in a month, starting on monday from the month before
  // finishing on sunday from the month after
  // Weeks are arrays of timestamps.
  function weeksForMonth($year, $month) {
    $one_day = 24*60*60;
    $first_day_of_the_month = $this->ansi_mktime($year, $month, 1);
    $day_stamp = $this->ansi_mktime($year, $month,
      2 - intval(date('N', $first_day_of_the_month)));
    $next_month = date('n', $this->ansi_mktime($year, $month+1));

    $weeks = array();

    // while we are in the same month
    while ($cur_month = date('n', $day_stamp) != $next_month) {      
      $week = array();
      // make arrays of 7 days
      for ($i = 0; $i < 7; ++$i) {
        $week[]= new CalendarDay($day_stamp, $this->eventFor($day_stamp));
        $day_stamp += $one_day;
      }
      $weeks[] = $week;
    }
    return $weeks;
  }
  
  
  function printMonth($year, $month) {
?>
<table>
  <thead>
    <tr>
      <th><abbr title="Lundi">L</abbr></th>
      <th><abbr title="Mardi">M</abbr></th>
      <th><abbr title="Mercredi">M</abbr></th>
      <th><abbr title="Jeudi">J</abbr></th>
      <th><abbr title="Vendredi">V</abbr></th>
      <th><abbr title="Samedi">S</abbr></th>
      <th><abbr title="Dimanche">D</abbr></th>
    </tr>
  </thead>
  <tbody>

<?php foreach ($this->weeksForMonth($year, $month) as $days) : ?>
  <tr>
<?php foreach ($days as $day) : ?>
    
    <td class="<?php if ($day->isToday()) echo 'today'; ?> <?php if ($day->isMonth($month)) echo 'thismonth'; ?>">
<?php if ($day->event) :?>
      <a href="<?php echo htmlspecialchars($day->event['uri']) ?>"
         title="<?php echo htmlspecialchars($day->event['title']) ?>">
        <?php echo $day->date('d') ?>
      </a>
<?php else : ?>
      <?php echo $day->date('d') ?>
<?php endif; ?>

    </td>

<?php endforeach; ?>
  </tr>
<?php endforeach; ?>

  </tbody>
</table>
<?php

  }
}