Add preview and drafts to audits

Summary: Add comment previews and saved drafts to audits, like Maniphest /
Differential.

Test Plan: Typed stuff into the box. Got a preview. Reloaded page. Stuff was
still there. Submitted comment. Stuff is gone.

Reviewers: btrahan, jungejason

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T904

Differential Revision: https://secure.phabricator.com/D1699

src/applications/diffusion/controller/commit/DiffusionCommitController.php

@@ -340,6 +340,16 @@ class DiffusionCommitController extends DiffusionController {
 
     $is_serious = PhabricatorEnv::getEnvConfig('phabricator.serious-business');
 
+    $draft = id(new PhabricatorDraft())->loadOneWhere(
+      'authorPHID = %s AND draftKey = %s',
+      $user->getPHID(),
+      'diffusion-audit-'.$commit->getID());
+    if ($draft) {
+      $draft = $draft->getDraft();
+    } else {
+      $draft = null;
+    }
+
     $form = id(new AphrontFormView())
       ->setUser($user)
       ->setAction('/audit/addcomment/')
@@ -348,11 +358,14 @@ class DiffusionCommitController extends DiffusionController {
         id(new AphrontFormSelectControl())
           ->setLabel('Action')
           ->setName('action')
+          ->setID('audit-action')
           ->setOptions(PhabricatorAuditActionConstants::getActionNameMap()))
       ->appendChild(
         id(new AphrontFormTextAreaControl())
           ->setLabel('Comments')
           ->setName('content')
+          ->setValue($draft)
+          ->setID('audit-content')
           ->setCaption(phutil_render_tag(
             'a',
             array(
@@ -370,7 +383,28 @@ class DiffusionCommitController extends DiffusionController {
     $panel->setHeader($is_serious ? 'Audit Commit' : 'Creative Accounting');
     $panel->appendChild($form);
 
-    return $panel;
+    require_celerity_resource('phabricator-transaction-view-css');
+
+    Javelin::initBehavior('audit-preview', array(
+      'uri'       => '/audit/preview/'.$commit->getID().'/',
+      'preview'   => 'audit-preview',
+      'content'   => 'audit-content',
+      'action'    => 'audit-action',
+    ));
+
+    $preview_panel =
+      '<div class="aphront-panel-preview">
+        <div id="audit-preview">
+          <div class="aphront-panel-preview-loading-text">
+            Loading preview...
+          </div>
+        </div>
+      </div>';
+
+    $view = new AphrontNullView();
+    $view->appendChild($panel);
+    $view->appendChild($preview_panel);
+    return $view;
   }
 
 }

src/applications/diffusion/controller/commit/__init__.php

@@ -19,12 +19,14 @@ phutil_require_module('phabricator', 'applications/diffusion/query/contains/base
 phutil_require_module('phabricator', 'applications/diffusion/query/pathchange/base');
 phutil_require_module('phabricator', 'applications/diffusion/view/commentlist');
 phutil_require_module('phabricator', 'applications/diffusion/view/commitchangetable');
+phutil_require_module('phabricator', 'applications/draft/storage/draft');
 phutil_require_module('phabricator', 'applications/markup/engine');
 phutil_require_module('phabricator', 'applications/phid/handle/data');
 phutil_require_module('phabricator', 'applications/repository/constants/repositorytype');
 phutil_require_module('phabricator', 'applications/repository/storage/repository');
 phutil_require_module('phabricator', 'infrastructure/celerity/api');
 phutil_require_module('phabricator', 'infrastructure/env');
+phutil_require_module('phabricator', 'infrastructure/javelin/api');
 phutil_require_module('phabricator', 'storage/queryfx');
 phutil_require_module('phabricator', 'view/form/base');
 phutil_require_module('phabricator', 'view/form/control/select');
@@ -32,6 +34,7 @@ phutil_require_module('phabricator', 'view/form/control/submit');
 phutil_require_module('phabricator', 'view/form/control/textarea');
 phutil_require_module('phabricator', 'view/form/error');
 phutil_require_module('phabricator', 'view/layout/panel');
+phutil_require_module('phabricator', 'view/null');
 phutil_require_module('phabricator', 'view/utils');
 
 phutil_require_module('phutil', 'markup');