Migrate project membership to edges

Summary:
  - Store project members in edges.
  - Migrate existing members to edge storage.
  - Delete PhabricatorProjectAffiliation.
  - I left the actual underlying data around just in case something goes wrong; we can delete it evenutally.

Test Plan:
  - Ran migration.
  - Created a new project.
  - Joined and left a project.
  - Added and removed project members.
  - Manually called PhabricatorOwnersOwner::loadAffiliatedUserPHIDs() to verify its behavior.

Reviewers: vrana, btrahan

Reviewed By: vrana

CC: aran

Maniphest Tasks: T603

Differential Revision: https://secure.phabricator.com/D3186

resources/sql/patches/migrate-project-edges.php

@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * Copyright 2012 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+echo "Migrating project members to edges...\n";
+foreach (new LiskMigrationIterator(new PhabricatorProject()) as $proj) {
+  $id = $proj->getID();
+  echo "Project {$id}: ";
+
+  $members = queryfx_all(
+    $proj->establishConnection('r'),
+    'SELECT userPHID FROM %T WHERE projectPHID = %s',
+    'project_affiliation',
+    $proj->getPHID());
+
+  if (!$members) {
+    echo "-\n";
+    continue;
+  }
+
+  $members = ipull($members, 'userPHID');
+
+  $editor = new PhabricatorEdgeEditor();
+  $editor->setSuppressEvents(true);
+  foreach ($members as $user_phid) {
+    $editor->addEdge(
+      $proj->getPHID(),
+      PhabricatorEdgeConfig::TYPE_PROJ_MEMBER,
+      $user_phid);
+  }
+  $editor->save();
+  echo "OKAY\n";
+}
+
+echo "Done.\n";