[releeph] Conduit failure with bad IDs

Summary:
Instead of returning a blank result it throws exceptions. Fix this up a
little so we get some consistency with differential

Test Plan:
Loaded a bad phid for releeph, returns empty list.
Try a good phid and get 2 releeph merges.

Reviewers: epriestley, elenaperezrioja, dschleimer, #blessed_reviewers

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D7302

src/applications/releeph/conduit/ConduitAPI_releeph_queryrequests_Method.php

@@ -46,6 +46,9 @@ final class ConduitAPI_releeph_queryrequests_Method
 
     foreach ($releephRequests as $releephRequest) {
       $branch = $releephRequest->loadReleephBranch();
+      if (!$branch) {
+        continue;
+      }
       $request_commit_phid = $releephRequest->getRequestCommitPHID();
       $revisionPHID =
         $query->getRevisionPHID($request_commit_phid);

src/applications/releeph/query/ReleephRequestQuery.php

@@ -10,6 +10,7 @@ final class ReleephRequestQuery
   private $severities;
   private $requestorPHIDs;
   private $branchIDs;
+  private $revisionPHIDs;
 
   const STATUS_ALL          = 'status-all';
   const STATUS_OPEN         = 'status-open';
@@ -67,22 +68,8 @@ final class ReleephRequestQuery
   }
 
   public function withRevisionPHIDs(array $revision_phids) {
-    $type = PhabricatorEdgeConfig::TYPE_DREV_HAS_COMMIT;
-
-    $edges = id(new PhabricatorEdgeQuery())
-      ->withSourcePHIDs($revision_phids)
-      ->withEdgeTypes(array($type))
-      ->execute();
-
-    $this->commitToRevMap = array();
-
-    foreach ($edges as $revision_phid => $edge) {
-      foreach ($edge[$type] as $commitPHID => $item) {
-        $this->commitToRevMap[$commitPHID] = $revision_phid;
-      }
-    }
-
-    $this->requestedCommitPHIDs = array_keys($this->commitToRevMap);
+    $this->revisionPHIDs = $revision_phids;
+    return $this;
   }
 
   public function loadPage() {
@@ -172,6 +159,31 @@ final class ReleephRequestQuery
         $this->requestorPHIDs);
     }
 
+    if ($this->revisionPHIDs) {
+      $type = PhabricatorEdgeConfig::TYPE_DREV_HAS_COMMIT;
+
+      $edges = id(new PhabricatorEdgeQuery())
+        ->withSourcePHIDs($this->revisionPHIDs)
+        ->withEdgeTypes(array($type))
+        ->execute();
+
+      $this->commitToRevMap = array();
+      foreach ($edges as $revision_phid => $edge) {
+        foreach ($edge[$type] as $commitPHID => $item) {
+          $this->commitToRevMap[$commitPHID] = $revision_phid;
+        }
+      }
+
+      if (!$this->commitToRevMap) {
+        throw new PhabricatorEmptyQueryException("Malformed Revision Phids");
+      }
+
+      $where[] = qsprintf(
+        $conn_r,
+        'requestCommitPHID IN (%Ls)',
+        array_keys($this->commitToRevMap));
+    }
+
     $where[] = $this->buildPagingClause($conn_r);
 
     return $this->formatWhereClause($where);

src/applications/releeph/storage/ReleephRequest.php

@@ -55,6 +55,10 @@ final class ReleephRequest extends ReleephDAO
    */
   public function getPusherIntent() {
     $project = $this->loadReleephProject();
+    if (!$project) {
+      return null;
+    }
+
     if (!$project->getPushers()) {
       return self::INTENT_WANT;
     }
@@ -228,7 +232,10 @@ final class ReleephRequest extends ReleephDAO
   }
 
   public function loadReleephProject() {
-    return $this->loadReleephBranch()->loadReleephProject();
+    $branch = $this->loadReleephBranch();
+    if ($branch) {
+      return $branch->loadReleephProject();
+    }
   }
 
   public function loadPhabricatorRepositoryCommit() {