gistfile1.php

/**
 * Tries to force the minicalendar widget to show the month of the next upcoming event by default, rather
 * than simply showing the current month (which might be empty).
 */
class Tribe_Advance_Minical
{
	protected $target_date = false;


	/**
	 * Sets up auto advance for minicalendar widgets. If an optional target date is provided that will be used to
	 * set the month.
	 *
	 * @param bool $target_date
	 */
	public function __construct($target_date = false) {
		if (is_string($target_date)) $this->set_target_date($target_date);
		add_filter('widget_display_callback', array($this, 'advance_minical'), 20, 2);
	}

	/**
	 * Basic check to help filter out spurious date formats.
	 *
	 * @param $date
	 */
	protected function set_target_date($date) {
		if (1 === preg_match('#^\d{4}-\d{2}(-\d{2})?$#', $date))
			$this->target_date = $date;
	}

	public function advance_minical($instance, $widget) {
		if ('tribe-mini-calendar' !== $widget->id_base || isset($instance['eventDate'])) return $instance;
		add_action('tribe_events_before_view', array($this, 'modify_list_query'), 5);
		$instance['eventDate'] = $this->determine_date();
		return $instance;
	}

	public function modify_list_query($template) {
		if (false === strpos($template, 'mini-calendar/list.php')) return;
		add_action('parse_query', array($this, 'amend_list_query'));
	}

	public function amend_list_query($query) {
		remove_action('parse_query', array($this, 'amend_list_query')); // Run this once only
		$the_query = $query->query_vars;

		$the_query['start_date'] = $this->determine_date() . '-01';
		$last_day = TribeDateUtils::getLastDayOfMonth(strtotime($the_query['start_date']));
		$the_query['end_date'] = substr_replace($the_query['start_date'], $last_day, -2);
		$the_query['end_date'] = TribeDateUtils::endOfDay($the_query['end_date']);

		$query->query_vars = $the_query;
	}

	protected function determine_date() {
		return (false !== $this->target_date) ? $this->target_date : $this->next_upcoming_date();
	}

	protected function next_upcoming_date() {
		$next_event = tribe_get_events(array(
			'eventDisplay' => 'upcoming',
			'posts_per_page' => 1
		));

		if (empty($next_event) || ! isset($next_event[0]->EventStartDate)) return date('Y-m');
		return substr($next_event[0]->EventStartDate, 0, 7);
	}
}


/**
 * If we don't pass a parameter it will try to advance the calendar to the same month as the next upcoming event.
 * However, we can also pass in a specific month:
 *
 *     new Tribe_Advance_Minical('2014-12'); // Set it to December 2014
 */
new Tribe_Advance_Minical();