Event Calendar

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * Event Calendar Class
 *
 * This class enables the creation of event calendar
 *
 * @author		Alex Glover <[email protected]>
 */
class EventCalendar {
 
    var $CI;
    var $show_next_prev = TRUE;
    var $next_prev_url = '';
    var $day_url = '';
    var $events_url = '';
 
    /**
    * Constructor
    *
    * @access	public
    */
    function EventCalendar($config = array()) {
 
      if(count($config) > 0) {
        $this->initialize($config);
      }
    }
 
    /**
    * Initializes the configuration
    *
    * @access	public
    * @param	array config array
    * @return	void
    */
    function initialize($config = array()) 
    {
      foreach ($config as $key => $val)
      {
        if (isset($this->$key))
        {
          $this->$key = $val;
        }
      } 
  	}
 
 
    /**
    * Generates the event calendar  
    *
    * @access	public
    * @param	array config array
    * @param	array events data array
    * @return	void
    */
    function generate($config = NULL, $events = NULL)
    {
 
      $date = $config['month'] . ' ' . $config['year'];
 
      //Tests if the offset is set, which is how many months away from current month the calendar is displaying
      if(isset($config['offset'])) {
        $offset = $config['offset'];
        $prev = $offset - 1;
        $next = $offset + 1;
      } else {
        $prev = -1;
        $next = 1;
      }
 
      //prints the calendar name and navigation arrows
      echo  '<span id="calendar-month">'; 
 
      echo anchor($this->next_prev_url . $prev . "#calendar-month", '<img src="'.base_url().'assets/images/calendar-left.png" id="calendar-left" class="calendar-nav"/>', 'rel="nofollow"') . date('F Y', strtotime($date)) . anchor($this->next_prev_url . $next . '#calendar-month', '<img src="'.base_url().'assets/images/calendar-right.png" id="calendar-right" class="calendar-nav"/>', 'rel="nofollow"') . '</span>';
 
 
      echo '
      <table cellpadding="0" cellspacing="0" border="1" class="volunteer-calendar">
        <thead>
          <tr>
          <th>Sunday</th>
          <th>Monday</th>
          <th>Tuesday</th>
          <th>Wednesday</th>
          <th>Thursday</th>
          <th>Friday</th>
          <th>Saturday</th>
          </tr>
        </thead>
 
        <tbody>';
 
      $first = $this->getFirstWeekDay($config['month'] . $config['year']);
      $total_days = $this->getTotalDaysinMonth($date);
 
      $count = 0;
 
      echo '<tr>';
 
      //displays empty days
      while($count < $first) {
        echo  '<td class="empty">&nbsp;</td>' . "\n";
        $count++;
      }
 
      //count used to display the date
      $day_count = 1;
 
      //loops through as long as day_countis less than the last day of the month
      while($day_count <= $total_days) {
 
        $daily_events = $this->getDailyEvents(date('Y-m-' . $day_count, strtotime($config['month'] . ' ' . $config['year'])), $events);
 
        $class = '';
 
        //if there are events on the specific day
        if(isset($daily_events)) {
          $print_events = '<ul class="events">' . $daily_events . '</ul>';
        }
 
        if(date('Y-m-' . $day_count, strtotime($config['month'] .' ' . $config['year'])) == date('Y-m-d')) {
          $class .= 'today';
        }
 
        //displays the day's number on the calendar
        $day_num = ($daily_events != '') ? '<a href="'.site_url().$this->day_url.date('Y-m-' . $day_count, strtotime($config['month'] .' ' . $config['year'])).'" rel="nofollow">' . $day_count . '</a>' : $day_count;
 
        echo '<td class="'.$class.'"><span class="day">' . $day_num . '</span>' . 
        $print_events
        . '</td>';
 
        if($count == 6) {
          $count = -1;
          echo '</tr>'. "\n";
          echo '<tr>';
        }
        $day_count++;
        $count++;
      }
 
 
 
      while($count <= 6) {
        echo  '<td class="empty">&nbsp;</td>' . "\n";
        $count++;
      }
      echo '</tr>';
      echo '</tbody>';
      echo '</table>';
    }
 
    /**
    * Gets the first day of the month in week number format (0-7 returned)
    *
    * @access	public
    * @param	date
    */
    function getFirstWeekDay($date) {
      return date('w', strtotime($date)); 
    }
 
    /**
    * Gets the total number of days in the given month
    *
    * @access	public
    * @param	date
    */
    function getTotalDaysinMonth($date) {
      return date('t', strtotime($date)); 
    }
 
    /**
    * Gets the events from the events array that match the given date
    *
    * @access	public
    * @param	String date
    * @param array events
    * @return String 
    */
    function getDailyEvents($date, $events) {
 
      if(!empty($events)) {
 
        $theevents = '';
        foreach($events as $event) {
 
          if($event->start_date >= date('Y-m-d 00:00:00', strtotime($date)) && $event->start_date <= date('Y-m-d 23:59:59', strtotime($date))) {
 
            $theevents .= '<li>' . anchor($this->events_url . $event->id, $event->title , 'rel="nofollow"') . '</li>';
          }
        }
 
      }
 
      return $theevents;
    }
 
 
}
 
?>