Custom URL Rewrite If a condition is met

Question

I'm looking for a way to change URLs if a condition is met. Something like:

URL: http://mysiteurl/

$url = 'http://mysiteurl/';

if ($userGroup == 'ABC') { 
    $url .= 'user/ABC/';
}

The new URL will be: http://mysiteurl/user/ABC/

But the page accessed will be the same.

Answer 1

I'll give you a logic then you implement it in an observer.

$url = Mage::getModel('core/url_rewrite')->getRequestPath(); //www.domaine.com/index.php/
$CustomerGroup = Mage::getSingleton('customer/session')->getCustomerGroupId(); //02 for exemple
echo Mage::getUrl($url, array('user' => $CustomerGroup));  
//www.domaine.com/index.php/user/02/

Answer 2

Maybe it's not the best solution, but to do a generic implementation without change magento URL structure I add this on index.php to make a redirect to http://mysiteurl/ if the user go to http://mysiteurl/user/ABC/

$url = "http://" . $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"];

$get = '';
$first = true;

// create get string
foreach ($_GET as $key => $value) {
    $get .= $first ? '?' : '&';
    $get .= $key . '=' . $value;
    $first = false;
}

// remove get from url
$url = str_replace($get, '', $url);

preg_match("/user.*/", $url, $pregMatchUser);

if($pregMatchUser) {
    $url = preg_replace("/user.*/", '', $url);

    // add get to url
    $url .= $get;

    header('Location: ' . $url);
    exit();
}

And then create a fake URL with JavaScript, using window.history.replaceState:

var url = window.location.toString();
var userGroupUrl = 'user/' + App.userGroup + '/';
var newUrl, index = url.indexOf("?");
if(index == -1) {
    newUrl = url[url.length - 1] == '/' ? url + userGroupUrl : url + '/' + userGroupUrl;
} else {
    newUrl = url.replace('?', userGroupUrl + '?');
}

window.history.replaceState({}, document.title, newUrl);

Of course, if you do this you will not be able to use /user/ in your URL for another thing.