<?php
/**

 * Calendar

 *

 * @package calendar
 * @version $Id$

 * @author ayunyan <ayu@commun.jp>

 * @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0

 * @link http://ayu.commun.jp/habari-calendar

 */
class Calendar extends Plugin
{

	private $week_starts = array(6 => 'Saturday', 0 => 'Sunday', 1 => 'Monday');


	/**

	 * plugin information

	 *

	 * @access public

	 * @retrun void

	 */

	public function info()

	{

		return array(

			'name' => 'Calendar',

			'version' => '0.01-alpha',

			'url' => 'http://ayu.commun.jp/habari-calendar',

			'author' => 'ayunyan',

			'authorurl' => 'http://ayu.commun.jp/',

			'license' => 'Apache License 2.0',

			'description' => 'Displays calendar on your blog.',
			'guid' => '4f97ad6b-c0a5-11dd-aff6-001b210f913f'

			);

	}

	/**

	 * action: plugin_activation

	 *

	 * @access public

	 * @param string $file

	 * @return void

	 */

	public function action_plugin_activation($file)

	{

		if (Plugins::id_from_file($file) != Plugins::id_from_file(__FILE__)) return;


		Options::set('calendar__week_start', 0);
	}



	/**

	 * action: init

	 *

	 * @access public

	 * @return void

	 */

	public function action_init()

	{
		$this->load_text_domain('calendar');



		$this->add_template('calendar', dirname(__FILE__) . '/templates/calendar.php');
	}



	/**

	 * action: update_check

	 *

	 * @access public

	 * @return void

	 */

	public function action_update_check()

	{

		Update::add($this->info->name, $this->info->guid, $this->info->version);

	}



	/**

	 * action: plugin_ui

	 *

	 * @access public

	 * @param string $plugin_id

	 * @param string $action

	 * @return void

	 */

	public function action_plugin_ui($plugin_id, $action)

	{

		if ($plugin_id != $this->plugin_id()) return;

		if ($action == _t('Configure')) {
			$form = new FormUI(strtolower(get_class($this)));
			$form->append('select', 'week_start', 'calendar__week_start', _t('Week starts on: ', 'calendar'), $this->week_starts);
			$form->append('submit', 'save', _t('Save'));

			$form->out();
		}

	}


	/**

	 * filter: plugin_config

	 *

	 * @access public

	 * @return array

	 */

	public function filter_plugin_config($actions, $plugin_id)

	{

		if ($plugin_id == $this->plugin_id()) {

			$actions[] = _t('Configure');
		}

		return $actions;

	}



	/**
	 * theme: show_calendar
	 *
	 * @access public
	 * @param object $theme
	 * @return string
	 */
	public function theme_show_calendar($theme)
	{

		$handler_vars = Controller::get_handler_vars();

		if (Controller::get_action() == 'display_date' && isset($handler_vars['month'])) {

			$year = (int)$handler_vars['year'];

			$month = (int)$handler_vars['month'];

		} else {

			$year = date('Y');

			$month = date('m');

		}



		$next_year = $year;

		$prev_year = $year;

		$next_month = $month + 1;

		$prev_month = $month - 1;

		if ($next_month == 13) {

			$next_month = 1;

			$next_year++;

		}

		if ($prev_month == 0) {

			$prev_month = 12;

			$prev_year--;

		}



		$start_time = mktime(0, 0, 0, $month, 1, $year);
		$end_time = mktime(0, 0, 0, $next_month, 1, $next_year);

		$t_posts_day = DB::get_column('SELECT pubdate FROM {posts} WHERE pubdate >= ? AND pubdate < ? AND status = ?', array($start_time, $end_time, Post::status('published')));

		$posts_day = array();

		@reset($t_posts_day);

		while (list(, $pubdate) = @each($t_posts_day)) {

                    $posts_day[] = (int)date("j", $pubdate);

		}



		$month_start_week = date("w", $start_time);

		$month_days = date("t", $start_time);

		$week_days = array(_t('Sun', 'calendar'), _t('Mon', 'calendar'), _t('Tue', 'calendar'), _t('Wed', 'calendar'), _t('Thu', 'calendar'), _t('Fri', 'calendar'), _t('Sat', 'calendar'));

		$week_start = Options::get('calendar__week_start');



		$calendar = array();

		$day = 0;

		while (1) {

			$week = array();



			for ($i = 0; $i < 7; $i++) {

				$wday = ($i + $week_start) % 7;

				if (count($calendar) == 0) {

					$week[] = array('label' => $week_days[($i + $week_start) % 7]);

                                        continue;

				} elseif ($day == 0) {

					if ($wday == $month_start_week) {

						$day = 1;

						if (array_search($day, $posts_day) !== false) {

							$week[] = array('label' => $day, 'url' => URL::get('display_entries_by_date', array('year' => $year, 'month' => sprintf('%02d', $month), 'day' => sprintf('%02d', $day))));

						} else {

							$week[] = array('label' => $day);

						}

					} else {

						$week[] = array('label' => null);

						continue;

					}

				} elseif ($day >= $month_days) {

					$week[] = array('label' => null);

					continue;

				} else {

					$day++;

					if (array_search($day, $posts_day) !== false) {

						$week[] = array('label' => $day, 'url' => URL::get('display_entries_by_date', array('year' => $year, 'month' => sprintf('%02d', $month), 'day' => sprintf('%02d', $day))));

					} else {

						$week[] = array('label' => $day);

					}

				}

			}

			$calendar[] = $week;

			if ($day == $month_days) break;

		}



		$theme->year = $year;

		$theme->month = $month;

		$theme->prev_month_url = URL::get('display_entries_by_date', array('year' => $prev_year, 'month' => sprintf('%02d', $prev_month)));

		$theme->next_month_url = URL::get('display_entries_by_date', array('year' => $next_year, 'month' => sprintf('%02d', $next_month)));

		$theme->calendar = $calendar;



		return $theme->fetch('calendar');

	}
}

?>