<?php
/*
 * e107 website system
 *
 * Copyright (C) 2008-2013 e107 Inc (e107.org)
 * Released under the terms and conditions of the
 * GNU General Public License (http://www.gnu.org/licenses/gpl.txt)
 * XXX HIGHLY EXPERIMENTAL AND SUBJECT TO CHANGE WITHOUT NOTICE. 
*/

if (!defined('e107_INIT')) { exit; }


class social_event
{

	/*
	* constructor
	*/
	function __construct()
	{
		
		
	}


	function config()
	{
		$event = array();
		
		$event[] = array(
			'name'     => "system_meta_pre",
			'function' => "og_image_add",
		);

		return $event;
		
	}


	/**
	 * Callback function to add og:image if there is no any
	 */
	function og_image_add($meta)
	{
		$ogImage = e107::pref('social', 'og_image', false);

		if(empty($ogImage) || empty($meta) || e_ADMIN_AREA === true)
		{
			return null;
		}

		// check if we have og:image defined
		foreach($meta as $m)
		{
			if($m['name'] === 'og:image')
			{
				return null;
			}
		}

		e107::meta('og:image', e107::getParser()->thumbUrl($ogImage, 'w=500', false, true));

	}

} //end class