Question Guest Page Cache + Mobile Detection

[PurseBlog]

Hi!

As part of a mobile theme I have some logic in plugin form that determines whether a user comes from a mobile device and then shows the mobile theme (instead of the desktop version).

if (!$vbulletin->options['forumops_mobile_groups'] or 
    is_member_of($vbulletin->userinfo, explode(',', $vbulletin->options['forumops_mobile_groups']))
) {
    if ($show['forumops_mobile'] !== true) {
        if (reset(explode('.', str_replace('www.', '', $_SERVER['SERVER_NAME']))) == 'm') {
            $show['forumops_mobile'] = true;
        }
        
        /**
        * @link http://stackoverflow.com/questions/6636306/mobile-browser-detection/6643934#6643934
        */
        if ($show['mobile_device'] = preg_match(
             '#\b(ip(hone|od)|android\b.+\bmobile|opera m(ob|in)i|windows (phone|ce)|blackberry'.
                 '|s(ymbian|eries60|amsung)|p(alm|rofile/midp|laystation portable)|nokia|fennec|htc[\-_]'.
                 '|up\.browser|[1-4][0-9]{2}x[1-4][0-9]{2})\b#i', 
        
            $_SERVER['HTTP_USER_AGENT']
        )) {
            $show['forumops_mobile'] = true;
        }
        
        $forceDesktop = !empty($_GET['forceDesktop']) || !empty($_COOKIE['tpf-bypass']);
        
        if ($forceDesktop) {
            $show['forumops_mobile'] = false;
        }
        
        $forceMobile = !empty($_GET['forceMobile']) || !empty($_COOKIE['tpf-mobile']);
        if ($forceMobile) {
            $show['forumops_mobile'] = true;
        }

    }
    
    if ($show['forumops_mobile']) {
        $styleid    = $vbulletin->options['forumops_mobile_styleid'];
        $userselect = true;
    }
}

if ($show['forumops_mobile'] !== true) {
    $show['forumops_mobile'] = false;
}

Hook location is style_fetch. When I enable guest full page caching, this logic no longer works. Which hook location do I place this plugin code in so that it triggers before the page cache?

Thanks!

 

[Fillip H.]

The guest cache runs on global_bootstrap_complete on execution order 1. I'm not sure if your logic would still work if it was shifted to that location, however.