Adding macro create method.

src/applications/macro/controller/PhabricatorMacroMemeController.php

@@ -9,12 +9,23 @@ final class PhabricatorMacroMemeController
     $upper_text = $request->getStr('uppertext');
     $lower_text = $request->getStr('lowertext');
     $user = $request->getUser();
+
+    $uri = PhabricatorMacroMemeController::generateMacro($user, $macro_name,
+      $upper_text, $lower_text);
+    if ($uri === false) {
+      return new Aphront404Response();
+    }
+    return id(new AphrontRedirectResponse())->setURI($uri);
+  }
+
+  public static function generateMacro($user, $macro_name, $upper_text,
+      $lower_text) {
     $macro = id(new PhabricatorMacroQuery())
       ->setViewer($user)
       ->withNames(array($macro_name))
       ->executeOne();
     if (!$macro) {
-      return new Aphront404Response();
+      return false;
     }
     $file = $macro->getFile();
 
@@ -29,7 +40,7 @@ final class PhabricatorMacroMemeController
     if ($xform) {
       $memefile = id(new PhabricatorFile())->loadOneWhere(
       'phid = %s', $xform->getTransformedPHID());
-      return id(new AphrontRedirectResponse())->setURI($memefile->getBestURI());
+      return $memefile->getBestURI();
     }
     $unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
     $transformers = (new PhabricatorImageTransformer());
@@ -40,6 +51,7 @@ final class PhabricatorMacroMemeController
     $xfile->setTransformedPHID($newfile->getPHID());
     $xfile->setTransform($hash);
     $xfile->save();
-    return id(new AphrontRedirectResponse())->setURI($newfile->getBestURI());
+
+    return $newfile->getBestURI();
   }
 }