Make Maniphest detail page react to viewer capabilities

Summary:
Ref T603. Disable things the user can't use, allow logged-out users to get a reasonable version of the page.

Also allow logged-out users to view edit history of comments if they're able to see the object.

Test Plan: Viewed Maniphest detail as a logged-out user, got a largely sensible page.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T603

Differential Revision: https://secure.phabricator.com/D7124

src/applications/maniphest/controller/ManiphestTaskDetailController.php

@@ -1,12 +1,13 @@
 <?php
 
-/**
- * @group maniphest
- */
 final class ManiphestTaskDetailController extends ManiphestController {
 
   private $id;
 
+  public function shouldAllowPublic() {
+    return true;
+  }
+
   public function willProcessRequest(array $data) {
     $this->id = $data['id'];
   }
@@ -306,6 +307,8 @@ final class ManiphestTaskDetailController extends ManiphestController {
       ),
     );
 
+    // TODO: Initializing these behaviors for logged out users fatals things.
+    if ($user->isLoggedIn()) {
       Javelin::initBehavior('maniphest-transaction-controls', array(
         'select'     => 'transaction-action',
         'controlMap' => $control_map,
@@ -320,6 +323,7 @@ final class ManiphestTaskDetailController extends ManiphestController {
         'map'        => $control_map,
         'tokenizers' => $tokenizer_map,
       ));
+    }
 
     $comment_header = id(new PHUIHeaderView())
       ->setHeader($is_serious ? pht('Add Comment') : pht('Weigh In'));
@@ -351,6 +355,15 @@ final class ManiphestTaskDetailController extends ManiphestController {
     $header = $this->buildHeaderView($task);
     $properties = $this->buildPropertyView($task, $field_list, $edges, $engine);
 
+    if (!$user->isLoggedIn()) {
+      // TODO: Eventually, everything should run through this. For now, we're
+      // only using it to get a consistent "Login to Comment" button.
+      $comment_form = id(new PhabricatorApplicationTransactionCommentView())
+        ->setUser($user)
+        ->setRequestURI($request->getRequestURI());
+      $preview_panel = null;
+    }
+
     return $this->buildApplicationPage(
       array(
         $crumbs,
@@ -393,15 +406,23 @@ final class ManiphestTaskDetailController extends ManiphestController {
     $id = $task->getID();
     $phid = $task->getPHID();
 
+    $can_edit = PhabricatorPolicyFilter::hasCapability(
+      $viewer,
+      $task,
+      PhabricatorPolicyCapability::CAN_EDIT);
+
     $view = id(new PhabricatorActionListView())
       ->setUser($viewer)
       ->setObject($task)
-      ->setObjectURI($this->getRequest()->getRequestURI())
-      ->addAction(
+      ->setObjectURI($this->getRequest()->getRequestURI());
+
+    $view->addAction(
       id(new PhabricatorActionView())
         ->setName(pht('Edit Task'))
         ->setIcon('edit')
-        ->setHref($this->getApplicationURI("/task/edit/{$id}/")));
+        ->setHref($this->getApplicationURI("/task/edit/{$id}/"))
+        ->setDisabled(!$can_edit)
+        ->setWorkflow(!$can_edit));
 
     if ($task->getOwnerPHID() === $viewer_phid) {
       $view->addAction(
@@ -428,7 +449,9 @@ final class ManiphestTaskDetailController extends ManiphestController {
         ->setName(pht('Merge Duplicates In'))
         ->setHref("/search/attach/{$phid}/TASK/merge/")
         ->setWorkflow(true)
-        ->setIcon('merge'));
+        ->setIcon('merge')
+        ->setDisabled(!$can_edit)
+        ->setWorkflow(!$can_edit));
 
     $view->addAction(
       id(new PhabricatorActionView())
@@ -441,14 +464,18 @@ final class ManiphestTaskDetailController extends ManiphestController {
         ->setName(pht('Edit Dependencies'))
         ->setHref("/search/attach/{$phid}/TASK/dependencies/")
         ->setWorkflow(true)
-        ->setIcon('link'));
+        ->setIcon('link')
+        ->setDisabled(!$can_edit)
+        ->setWorkflow(!$can_edit));
 
     $view->addAction(
       id(new PhabricatorActionView())
         ->setName(pht('Edit Differential Revisions'))
         ->setHref("/search/attach/{$phid}/DREV/")
         ->setWorkflow(true)
-        ->setIcon('attach'));
+        ->setIcon('attach')
+        ->setDisabled(!$can_edit)
+        ->setWorkflow(!$can_edit));
 
     $pholio_app =
       PhabricatorApplication::getByClass('PhabricatorApplicationPholio');
@@ -458,7 +485,9 @@ final class ManiphestTaskDetailController extends ManiphestController {
         ->setName(pht('Edit Pholio Mocks'))
         ->setHref("/search/attach/{$phid}/MOCK/edge/")
         ->setWorkflow(true)
-        ->setIcon('attach'));
+        ->setIcon('attach')
+        ->setDisabled(!$can_edit)
+        ->setWorkflow(!$can_edit));
     }
 
     return $view;

src/applications/transactions/controller/PhabricatorApplicationTransactionCommentHistoryController.php

@@ -5,6 +5,10 @@ final class PhabricatorApplicationTransactionCommentHistoryController
 
   private $phid;
 
+  public function shouldAllowPublic() {
+    return true;
+  }
+
   public function willProcessRequest(array $data) {
     $this->phid = $data['phid'];
   }