<?php

/**
 * list either subpages or siblings
 */

class wpv_subpages extends WP_Widget {
		
	public function wpv_subpages() {
		$widget_ops = array(
			'classname' => 'wpv_subpages',
			'description' => __('Displays a list of SubPages', 'wpv')
		);
		$this->WP_Widget('wpv_subpages', __('Vamtam - List subpages', 'wpv') , $widget_ops);
	}
	
	function widget($args, $instance) {
		global $post;
		$children = wp_list_pages('echo=0&child_of=' . $post->ID . '&title_li=');
		
		if($children)
			$parent = $post->ID; // try listing children
		else {
			$parent = $post->post_parent; // try siblings
			if(!$parent)
				$parent = $post->ID;
		}
		$parent_title = get_the_title($parent);
		extract($args);
		$title = apply_filters('widget_title', empty($instance['title']) ? $parent_title : $instance['title'], $instance, $this->id_base);
		$sortby = empty($instance['sortby']) ? 'menu_order' : $instance['sortby'];
		$exclude = $instance['exclude'];
		
		require WPV_WIDGETS_TPL . 'subpages-widget.php';
	}

	function update($new_instance, $old_instance) {
		$instance = $old_instance;
		$instance['title'] = strip_tags($new_instance['title']);
		
		if(in_array($new_instance['sortby'], array('post_title', 'menu_order', 'ID')))
			$instance['sortby'] = $new_instance['sortby'];
		else
			$instance['sortby'] = 'menu_order';

		$instance['exclude'] = strip_tags($new_instance['exclude']);

		return $instance;
	}
	
	function form($instance) {
		$instance = wp_parse_args((array)$instance, array(
			'sortby' => 'menu_order',
			'title' => '',
			'exclude' => ''
		));
		$title = esc_attr($instance['title']);
		$exclude = esc_attr($instance['exclude']);

		require WPV_WIDGETS_TPL . 'subpages-config.php';
	}
}
register_widget('wpv_subpages');