Start actually showing the phurl urls to users

Summary: Fixes T10679. Added a 'short url' field to the phurl link page and changed the "view url" button to link to the shortened version

Test Plan: Create a phurl link (or navigate to an existing one) and note that there is now a field for "Short URL". Also verified that the "Visit URL" button in the top right still works as intended

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley, yelirekim

Maniphest Tasks: T10679

Differential Revision: https://secure.phabricator.com/D16473

src/applications/phurl/controller/PhabricatorPhurlURLViewController.php

@@ -86,7 +86,7 @@ final class PhabricatorPhurlURLViewController
       ->setTag('a')
       ->setText(pht('Visit URL'))
       ->setIcon('fa-external-link')
-      ->setHref("u/{$id}")
+      ->setHref($url->getRedirectURI())
       ->setDisabled(!$url->isValid());
 
     $header = id(new PHUIHeaderView())
@@ -129,6 +129,10 @@ final class PhabricatorPhurlURLViewController
     $properties = id(new PHUIPropertyListView())
       ->setUser($viewer);
 
+    $properties->addProperty(
+      pht('Short URL'),
+      $url->getRedirectURI());
+
     $properties->addProperty(
       pht('Original URL'),
       $url->getLongURL());

src/applications/phurl/storage/PhabricatorPhurlURL.php

@@ -99,10 +99,18 @@ final class PhabricatorPhurlURL extends PhabricatorPhurlDAO
 
   public function getRedirectURI() {
     if (strlen($this->getAlias())) {
-      return '/u/'.$this->getAlias();
+      $path = '/u/'.$this->getAlias();
     } else {
-      return '/u/'.$this->getID();
+      $path = '/u/'.$this->getID();
     }
+    $short_domain = PhabricatorEnv::getEnvConfig('phurl.short-uri');
+    if (!$short_domain) {
+      return $path;
+    }
+
+    $uri = new PhutilURI($short_domain);
+    $uri->setPath($path);
+    return (string)$uri;
   }
 
 /* -(  PhabricatorPolicyInterface  )----------------------------------------- */