Reduce callsites to "ArcanistDifferentialRevisionStatus" in Phabricator

Summary:
Ref T2543. These are currently numeric values, like "0" and "3". I want to replace them with strings, like "accepted", and move definitions from Arcanist to Phabricator.

To set the stage for this, reduce the number of callsites where Phabricator invokes `ArcanistDifferentialRevisionStatus`.

This is just the easy ones. I'll hold this until the release cut.

Test Plan:
- Called `differential.find`.
- Called `differential.getrevision`.
- Called `differential.query`.
- Removed all reviewers from a revision, saw warning.
- Abandoned the no-reviewers revision, no more warning.
- Attached a revision to a task to get it to show the state icon with the status on a tooltip.
- Viewed revision bucketing on dashboard.
- Used `bin/search index` to reindex a revision.
- Hit the "Land Revision" endpoint.

I didn't explicitly test these cases:

- Doorkeeper Asana integration, since setup takes a thousand years.
- Disambiguation logic when multiple hashes match, since setup is also very involved.
- Releeph because it's Releeph.

Reviewers: chad

Reviewed By: chad

Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam

Maniphest Tasks: T2543

Differential Revision: https://secure.phabricator.com/D18339

src/applications/differential/conduit/DifferentialFindConduitAPIMethod.php

···
         'uri'         => PhabricatorEnv::getProductionURI('/D'.$id),
         'dateCreated' => $revision->getDateCreated(),
         'authorPHID'  => $revision->getAuthorPHID(),
-        'statusName'  =>
-          ArcanistDifferentialRevisionStatus::getNameForRevisionStatus(
-            $revision->getStatus()),
+        'statusName'  => $revision->getStatusDisplayName(),
         'sourcePath'  => $diff->getSourcePath(),
       );
     }

src/applications/differential/conduit/DifferentialGetRevisionConduitAPIMethod.php

···
       'uri' => PhabricatorEnv::getURI('/D'.$revision->getID()),
       'title' => $revision->getTitle(),
       'status' => $revision->getStatus(),
-      'statusName'  =>
-        ArcanistDifferentialRevisionStatus::getNameForRevisionStatus(
-          $revision->getStatus()),
+      'statusName'  => $revision->getStatusDisplayName(),
       'summary' => $revision->getSummary(),
       'testPlan' => $revision->getTestPlan(),
       'lineCount' => $revision->getLineCount(),

src/applications/differential/conduit/DifferentialQueryConduitAPIMethod.php

···
         'dateModified'        => $revision->getDateModified(),
         'authorPHID'          => $revision->getAuthorPHID(),
         'status'              => $revision->getStatus(),
-        'statusName'          =>
-          ArcanistDifferentialRevisionStatus::getNameForRevisionStatus(
-            $revision->getStatus()),
+        'statusName'          => $revision->getStatusDisplayName(),
         'properties' => $revision->getProperties(),
         'branch'              => $diff->getBranch(),
         'summary'             => $revision->getSummary(),

src/applications/differential/customfield/DifferentialBranchField.php

···
     PhabricatorApplicationTransactionEditor $editor,
     array $xactions) {
 
-    $status_accepted = ArcanistDifferentialRevisionStatus::ACCEPTED;
+    $revision = $this->getObject();
 
     // Show the "BRANCH" section only if there's a new diff or the revision
     // is "Accepted".
-    if ((!$editor->getDiffUpdateTransaction($xactions)) &&
-        ($this->getObject()->getStatus() != $status_accepted)) {
+    $is_update = (bool)$editor->getDiffUpdateTransaction($xactions);
+    $is_accepted = $revision->isAccepted();
+    if (!$is_update && !$is_accepted) {
       return;
     }
 
-    $branch = $this->getBranchDescription($this->getObject()->getActiveDiff());
+    $branch = $this->getBranchDescription($revision->getActiveDiff());
     if ($branch === null) {
       return;
     }

src/applications/differential/customfield/DifferentialReviewersField.php

···
   public function getWarningsForRevisionHeader(array $handles) {
     $revision = $this->getObject();
 
-    $status_needs_review = ArcanistDifferentialRevisionStatus::NEEDS_REVIEW;
-    if ($revision->getStatus() != $status_needs_review) {
+    if (!$revision->isNeedsReview()) {
       return array();
     }
 

src/applications/differential/doorkeeper/DifferentialDoorkeeperRevisionFeedStoryPublisher.php

···
   }
 
   public function getActiveUserPHIDs($object) {
-    $status = $object->getStatus();
-    if ($status == ArcanistDifferentialRevisionStatus::NEEDS_REVIEW) {
+    if ($object->isNeedsReview()) {
       return $object->getReviewerPHIDs();
     } else {
       return array();
···
   }
 
   public function getPassiveUserPHIDs($object) {
-    $status = $object->getStatus();
-    if ($status == ArcanistDifferentialRevisionStatus::NEEDS_REVIEW) {
+    if ($object->isNeedsReview()) {
       return array();
     } else {
       return $object->getReviewerPHIDs();

src/applications/differential/phid/DifferentialRevisionPHIDType.php

···
 
       $icon = DifferentialRevisionStatus::getRevisionStatusIcon($status);
       $color = DifferentialRevisionStatus::getRevisionStatusColor($status);
-      $name = ArcanistDifferentialRevisionStatus::getNameForRevisionStatus(
-        $status);
+      $name = $revision->getStatusDisplayName();
 
       $handle
         ->setStateIcon($icon)

src/applications/differential/query/DifferentialRevisionRequiredActionResultBucket.php

···
   }
 
   private function filterShouldLand(array $phids) {
-    $status_accepted = ArcanistDifferentialRevisionStatus::ACCEPTED;
-
     $objects = $this->getRevisionsAuthored($this->objects, $phids);
 
     $results = array();
     foreach ($objects as $key => $object) {
-      if ($object->getStatus() != $status_accepted) {
+      if (!$object->isAccepted()) {
         continue;
       }
 
···
   }
 
   private function filterWaitingForReview(array $phids) {
-    $status_review = ArcanistDifferentialRevisionStatus::NEEDS_REVIEW;
-
     $objects = $this->getRevisionsAuthored($this->objects, $phids);
 
     $results = array();
     foreach ($objects as $key => $object) {
-      if ($object->getStatus() != $status_review) {
+      if (!$object->isNeedsReview()) {
         continue;
       }
 
···
   }
 
   private function filterWaitingOnOtherReviewers(array $phids) {
-    $statuses = array(
-      ArcanistDifferentialRevisionStatus::NEEDS_REVIEW,
-    );
-    $statuses = array_fuse($statuses);
-
     $objects = $this->getRevisionsNotAuthored($this->objects, $phids);
 
     $results = array();
     foreach ($objects as $key => $object) {
-      if (!isset($statuses[$object->getStatus()])) {
+      if (!$object->isNeedsReview()) {
         continue;
       }
 

src/applications/differential/query/DifferentialRevisionResultBucket.php

···
 
     $objects = $this->getRevisionsNotAuthored($objects, $phids);
 
-    $status_review = ArcanistDifferentialRevisionStatus::NEEDS_REVIEW;
     foreach ($objects as $key => $object) {
-      if ($object->getStatus() != $status_review) {
+      if (!$object->isNeedsReview()) {
         continue;
       }
 

src/applications/differential/query/DifferentialRevisionSearchEngine.php

···
   }
 
   private function loadUnlandedDependencies(array $revisions) {
-    $status_accepted = ArcanistDifferentialRevisionStatus::ACCEPTED;
-
     $phids = array();
     foreach ($revisions as $revision) {
-      if ($revision->getStatus() != $status_accepted) {
+      if (!$revision->isAccepted()) {
         continue;
       }
 

src/applications/differential/search/DifferentialRevisionFulltextEngine.php

···
 
     // If a revision needs review, the owners are the reviewers. Otherwise, the
     // owner is the author (e.g., accepted, rejected, closed).
-    $status_review = ArcanistDifferentialRevisionStatus::NEEDS_REVIEW;
-    if ($revision->getStatus() == $status_review) {
+    if ($revision->isNeedsReview()) {
       $reviewers = $revision->getReviewerPHIDs();
       $reviewers = array_fuse($reviewers);
 

src/applications/differential/storage/DifferentialRevision.php

···
     return ($this->getStatus() == $status_accepted);
   }
 
+  public function isNeedsReview() {
+    $status_review = ArcanistDifferentialRevisionStatus::NEEDS_REVIEW;
+    return ($this->getStatus() == $status_review);
+  }
+
   public function getStatusIcon() {
     $map = array(
       ArcanistDifferentialRevisionStatus::NEEDS_REVIEW

src/applications/diffusion/query/lowlevel/DiffusionLowLevelCommitFieldsQuery.php

···
     $revisions = array_reverse($revisions);
 
     // Try to find an accepted revision first.
-    $status_accepted = ArcanistDifferentialRevisionStatus::ACCEPTED;
     foreach ($revisions as $revision) {
-      if ($revision->getStatus() == $status_accepted) {
+      if ($revision->isAccepted()) {
         return $revision;
       }
     }

src/applications/drydock/operation/DrydockLandRepositoryOperation.php

···
       );
     }
 
-    $status_accepted = ArcanistDifferentialRevisionStatus::ACCEPTED;
-    if ($revision->getStatus() != $status_accepted) {
-      switch ($revision->getStatus()) {
-        case ArcanistDifferentialRevisionStatus::CLOSED:
-          return array(
-            'title' => pht('Revision Closed'),
-            'body' => pht(
-              'This revision has already been closed. Only open, accepted '.
-              'revisions may land.'),
-          );
-        case ArcanistDifferentialRevisionStatus::ABANDONED:
-          return array(
-            'title' => pht('Revision Abandoned'),
-            'body' => pht(
-              'This revision has been abandoned. Only accepted revisions '.
-              'may land.'),
-          );
-        default:
-          return array(
-            'title' => pht('Revision Not Accepted'),
-            'body' => pht(
-              'This revision is still under review. Only revisions which '.
-              'have been accepted may land.'),
-          );
-      }
+    if ($revision->isAccepted()) {
+      // We can land accepted revisions, so continue below. Otherwise, raise
+      // an error with tailored messaging for the most common cases.
+    } else if ($revision->isAbandoned()) {
+      return array(
+        'title' => pht('Revision Abandoned'),
+        'body' => pht(
+          'This revision has been abandoned. Only accepted revisions '.
+          'may land.'),
+      );
+    } else if ($revision->isClosed()) {
+      return array(
+        'title' => pht('Revision Closed'),
+        'body' => pht(
+          'This revision has already been closed. Only open, accepted '.
+          'revisions may land.'),
+      );
+    } else {
+      return array(
+        'title' => pht('Revision Not Accepted'),
+        'body' => pht(
+          'This revision is still under review. Only revisions which '.
+          'have been accepted may land.'),
+      );
     }
 
     // Check for other operations. Eventually this should probably be more

src/applications/releeph/differential/DifferentialReleephRequestFieldSpecification.php

···
       return null;
     }
 
-    $status = $this->getRevision()->getStatus();
-    if ($status == ArcanistDifferentialRevisionStatus::CLOSED) {
+    if ($this->getRevision()->isClosed()) {
       $verb = $tense[$this->releephAction]['past'];
     } else {
       $verb = $tense[$this->releephAction]['future'];