add subdomain based redirection; redirect chat.lbry.io

controller/Controller.class.php

@@ -58,6 +58,7 @@ class Controller
   public static function execute($method, $uri)
   {
     $router = static::getRouterWithRoutes();
+    static::performSubdomainRedirects();
     try
     {
       $dispatcher = new Routing\Dispatcher($router->getData());
@@ -75,6 +76,17 @@ class Controller
     }
   }
 
+  protected static function performSubdomainRedirects()
+  {
+    $subDomain = Request::getSubDomain();
+
+    switch($subDomain) {
+      case 'chat':
+      case 'slack':
+        return static::redirect('https://discordapp.com/invite/U5aRyN6');
+    }
+  }
+
   protected static function getRouterWithRoutes(): \Routing\RouteCollector
   {
     $router = new Routing\RouteCollector();

controller/Request.class.php

@@ -92,6 +92,30 @@ class Request
     return static::getHttpHeader('Host') ? rtrim(static::getHttpHeader('Host'), '.') : '';
   }
 
+  public static function getSubDomain(): string
+  {
+    $urlParts = parse_url(static::getHost());
+    $host = $urlParts['host'] ?? '';
+    $domainParts = explode('.', $host);
+    $domainPartCount = count($domainParts);
+
+    if (count($domainParts) < 1)
+    {
+      return '';
+    }
+
+    $isLocalhost = $domainParts[$domainPartCount - 1] === 'localhost';
+
+    if (!$isLocalhost && count($domainParts) < 2)
+    {
+      return '';
+    }
+
+    return $isLocalhost ?
+      $domainParts[$domainPartCount - 2] :
+      $domainParts[$domainPartCount - 3];
+  }
+
   public static function getHostAndProto(): string
   {
     return (static::isSSL() ? 'https' : 'http') . '://' . static::getHost();