<?php
if ($modx->event->name != 'OnHandleRequest' || $modx->context->key == 'mgr' || !$modx->getOption('friendly_urls')) {return;}

$ctx = [
    'ua'=>'web',
    'ru'=>'ru', 
];
$REQUEST_URI = explode('?',$_SERVER['REQUEST_URI'])[0];

 
if(preg_match('#^/assets/#',$REQUEST_URI, $matches)){  
    return;
}
$ctx_key = 'ua'; 
if(preg_match('#^/([a-z]{2})/#',$REQUEST_URI, $matches)){
    $ctx_key = $matches[1]; 
} else {
    $modx->switchContext('web');
    return;
}
if(!isset($ctx[$ctx_key])){  
    $modx->switchContext('web');
    return;
}

$context = $ctx[$ctx_key];
if ($ctx[$ctx_key] != 'web') { 
  $modx->switchContext($ctx[$ctx_key]);
}
 else {
    $context =$ctx_key; 
}
$uri = str_replace('/'.$ctx_key.'/', '', $REQUEST_URI);   
if ($uri != '') {    
    if ($res = $modx->findResource($uri,$ctx[$ctx_key])){  
        $modx->sendForward($res); 
    }  else {
        $modx->sendErrorPage();
    } 
} else { 
    $modx->sendForward($modx->getOption('site_start')); 
}