LOCAL/POLICY: Project: Make project field required for Maniphest

Enforce a local policy that all tasks must have an associated project.

src/applications/maniphest/editor/ManiphestTransactionEditor.php

@@ -316,6 +316,48 @@ final class ManiphestTransactionEditor
       $errors[] = $error;
     }
 
+    if (!$this->getIsNewObject()) {
+      $projects = PhabricatorEdgeQuery::loadDestinationPHIDs(
+        $object->getPHID(),
+        PhabricatorProjectObjectHasProjectEdgeType::EDGECONST);
+      $projects = array_fuse($projects);
+    } else {
+      $projects = array();
+    }
+
+    foreach ($xactions as $xaction) {
+      $xaction_type = $xaction->getTransactionType();
+      $edge_type = $xaction->getMetadataValue('edge:type');
+      if ($xaction_type != PhabricatorTransactions::TYPE_EDGE ||
+          $edge_type != PhabricatorProjectObjectHasProjectEdgeType::EDGECONST) {
+        continue;
+      }
+
+      $new = $xaction->getNewValue();
+      $new_add = idx($new, '+', array());
+      $new_rem = idx($new, '-', array());
+      $new_set = idx($new, '=', null);
+
+      foreach ($new_add as $phid => $edge) {
+        $projects[$phid] = $phid;
+      }
+      foreach ($new_rem as $phid => $edge) {
+        unset($projects[$phid]);
+      }
+      if ($new_set) {
+        $projects = $new_set;
+      }
+    }
+
+    if (empty($projects)) {
+      $errors[] = new PhabricatorApplicationTransactionValidationError(
+        PhabricatorTransactions::TYPE_EDGE,
+        pht('Required'),
+        pht('You must specify at least one project tag for a task.'),
+        null
+      );
+    }
+
     return $errors;
   }
 

src/applications/project/engineextension/PhabricatorProjectsEditEngineExtension.php

@@ -63,6 +63,10 @@ final class PhabricatorProjectsEditEngineExtension
       ->setValue($project_phids)
       ->setViewer($viewer);
 
+    if ($object instanceof ManiphestTask) {
+      $projects_field->setIsRequired(true);
+    }
+
     $projects_datasource = id(new PhabricatorProjectDatasource())
       ->setViewer($viewer);