e107inc/e107

<?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' => "addFallbackMeta",
        );

        return $event;
        
    }



    /**
     * Callback function to add og:image if there is no any
     */
    function addFallbackMeta($meta)
    {

        if(e_ADMIN_AREA === true)
        {
            return null;
        }

        /** @note TITLE */
        if($title = e107::getSingleton('eResponse')->getMetaTitle())
        {
            e107::meta('og:title', $title); // will only populate if not already defined.
            e107::meta('twitter:title', $title);
        }
        elseif(deftrue('e_FRONTPAGE'))
        {
            e107::meta('og:title', SITENAME);
            e107::meta('twitter:title', SITENAME);
        }

        /** @note TYPE */
        if(empty($meta['og:type']))
        {
            e107::meta('og:type', 'website');
        }

        /** @note DESCRIPTION */
        if(empty($meta['og:description']))
        {
            $description = e107::getSingleton('eResponse')->getMetaDescription();

            if(empty($description))
            {
                if(deftrue('META_DESCRIPTION'))
                {
                    $description = META_DESCRIPTION;
                }
                else
                {
                    $tmp = e107::pref('core', 'meta_description');
                    if(!empty($tmp[e_LANGUAGE]))
                    {
                        $description = $tmp[e_LANGUAGE];
                    }
                }
            }

            if(!empty($description))
            {
                e107::meta('og:description', $description);
                e107::meta('twitter:description', $description);
            }
        }

        /** @note IMAGE */
        if(!empty($meta['og:image']))
        {
            // e107::getDebug()->log("Skipping Social plugin og:image fallback");
            return null;
        }

        $pref = e107::getConfig()->getPref();

        if($ogImage = e107::pref('social', 'og_image', false))
        {
            $metaImg = e107::getParser()->thumbUrl($ogImage, 'w=800', false, true);
            e107::meta('og:image', $metaImg);
            e107::meta('twitter:image', $metaImg);
        }
        elseif(!empty($pref['sitebutton']))
        {
            $siteButton = (strpos($pref['sitebutton'],'{e_MEDIA') !== false) ? e107::getParser()->thumbUrl($pref['sitebutton'],'w=800',false, true) : e107::getParser()->replaceConstants($pref['sitebutton'],'full');
            e107::meta('og:image',$siteButton);
            e107::meta('twitter:image', $siteButton);
        }
        elseif(!empty($pref['sitelogo'])) // fallback to sitelogo
        {
            $siteLogo = (strpos($pref['sitelogo'],'{e_MEDIA') !== false) ? e107::getParser()->thumbUrl($pref['sitelogo'],'w=800',false, true) : e107::getParser()->replaceConstants($pref['sitelogo'],'full');
            e107::meta('og:image',$siteLogo);
            e107::meta('twitter:image', $siteLogo);
        }

    }

} //end class