Migrate Differential Revision SavedQueries to the new "statuses" tokenizer

Summary: Ref T2543. This migrates existing saved queries so they use the right modern values for the new tokenizer control, introduced in D18393.

Test Plan:
  - Saved a query with "Abandoned" selected as the status in the old "<select />", prior to D18393.
  - Upgraded to D18393, which broke the query (it no longer selected any status filter).
  - Ran the migration to fix things.
  - Saw the query now execute with "Abandoned" selected in the tokenizer, preseving the original behavior accurately.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T2543

Differential Revision: https://secure.phabricator.com/D18394

resources/sql/autopatches/20170811.differential.01.status.php

@@ -0,0 +1,48 @@
+<?php
+
+// Migrate saved Differential revision queries from using a "<select />"
+// control with hard-coded status groups for status selection to using a
+// tokenizer with status functions.
+
+$table = new PhabricatorSavedQuery();
+$conn = $table->establishConnection('w');
+
+$status_map = array(
+  'status-open' => array('open()'),
+  'status-closed' => array('closed()'),
+
+  'status-accepted' => array('accepted'),
+  'status-needs-review' => array('needs-review'),
+  'status-needs-revision' => array('needs-revision'),
+  'status-abandoned' => array('abandoned'),
+);
+
+foreach (new LiskMigrationIterator($table) as $query) {
+  if ($query->getEngineClassName() !== 'DifferentialRevisionSearchEngine') {
+    // This isn't a revision query.
+    continue;
+  }
+
+  $parameters = $query->getParameters();
+  $status = idx($parameters, 'status');
+
+  if (!$status) {
+    // This query didn't specify a "status" value.
+    continue;
+  }
+
+  if (!isset($status_map[$status])) {
+    // The "status" value is unknown, or does not correspond to a
+    // modern "status" constraint.
+    continue;
+  }
+
+  $parameters['statuses'] = $status_map[$status];
+
+  queryfx(
+    $conn,
+    'UPDATE %T SET parameters = %s WHERE id = %d',
+    $table->getTableName(),
+    phutil_json_encode($parameters),
+    $query->getID());
+}