<?php

/*

Plugin Name: AJAX Calendar

Plugin URI: http://urbangiraffe.com/plugins/ajax-calendar/

Description: A version of the WordPress calendar that uses AJAX to allow the user to step through the months without updating the page.  Additionally, a click on the 'expand' link shows all the posts within that month, inside the calendar.  Caching of content can be enabled to increase speed.

Version: 2.4.9

Author: John Godley

Author URI: http://urbangiraffe.com

*/

include_once (dirname (__FILE__).'/plugin.php');

include_once (dirname (__FILE__).'/models/widget.php');

if (!class_exists ('AJAX_Calendar'))

{

class AJAX_Calendar extends AJAX_Calendar_Plugin

{

	function AJAX_Calendar ()

	{

		$this->register_plugin ('ajax-calendar', __FILE__);

		if (is_admin ())

		{

		  $this->add_action ('publish_post', 'cache_remove');

		  $this->add_action ('save_post',    'cache_remove');

		  $this->add_action ('delete_post',  'cache_remove');

		}

		else

		  $this->add_action ('wp_head');

		$this->widget = new AJAX_Calendar_Widget ('AJAX Calendar');

	}

	function show ($categories = '')

	{

		include_once (dirname (__FILE__).'/models/calendar.php');

		$this->render ('calendar', array ('calendar' => new Calendar ($this->url (), $categories)));

	}

	function wp_head ()

	{

		$this->render ('head');

	}

	function cache_remove ($id)

	{

	  $post = wp_get_single_post ($id);

	  $postmonth = substr ($post->post_date, 5, 2);

	  $postyear  = substr ($post->post_date, 0, 4);

	  $modmonth  = substr ($post->post_modified, 5, 2);

	  $modyear   = substr ($post->post_modified, 0, 4);

	  // Delete the cache files for the two dates, just in case something has changed

	  for ($x = 0; $x < 2; $x++)

	  {

			wp_cache_delete ($postyear."_".$postmonth."_".$x);

			wp_cache_delete ($modyear."_".$modmonth."_".$x);

	  }

	}

	function &get ()

	{

    static $instance;

    if (!isset ($instance))

		{

			$c = __CLASS__;

			$instance = new $c;

    }

    return $instance;

	}

}

function ajax_calendar ($categories = '')

{

	$calendar = AJAX_Calendar::get ();

	$calendar->show ($categories);

}

}

$ajax_calendar_plugin = AJAX_Calendar::get ();

?>