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phorge/src/applications/search/editor/attach/PhabricatorObjectAttachmentEditor.php
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PhabricatorObjectAttachmentEditor.php
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<?php
/*
* Copyright 2011 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.
*/
/**
* Manage attaching, detaching and updating edges between objects (for instance,
* relationships between Tasks and Revisions).
*/
final class PhabricatorObjectAttachmentEditor {
private $objectType;
private $object;
private $user;
public function __construct($object_type, $object) {
$this->objectType = $object_type;
$this->object = $object;
}
public function setUser(PhabricatorUser $user) {
$this->user = $user;
return $this;
}
public function attachObjects($attach_type, array $phids, $two_way) {
$object_type = $this->objectType;
$object = $this->object;
$object_phid = $object->getPHID();
// sort() so that removing [X, Y] and then adding [Y, X] is correctly
// detected as a no-op.
sort($phids);
$old_phids = $object->getAttachedPHIDs($attach_type);
sort($old_phids);
$phids = array_values($phids);
$old_phids = array_values($old_phids);
if ($phids === $old_phids) {
return;
}
$all_phids = array_merge($phids, $old_phids);
$attach_objs = id(new PhabricatorObjectHandleData($all_phids))
->loadObjects();
// Remove PHIDs which don't actually exist, to prevent silliness.
$phids = array_keys(array_select_keys($attach_objs, $phids));
if ($phids) {
$phids = array_combine($phids, $phids);
}
// Update the primary object.
$this->writeOutboundEdges($object_type, $object, $attach_type, $phids);
if (!$two_way) {
return;
}
// Loop through all of the attached/detached objects and update them.
foreach ($attach_objs as $phid => $attach_obj) {
$attached_phids = $attach_obj->getAttachedPHIDs($object_type);
// Figure out if we're attaching or detaching this object.
if (isset($phids[$phid])) {
if (in_array($object_phid, $attached_phids)) {
// Already attached.
continue;
}
$attached_phids[] = $object_phid;
} else {
$attached_phids = array_fill_keys($attached_phids, true);
unset($attached_phids[$object_phid]);
$attached_phids = array_keys($attached_phids);
}
$this->writeOutboundEdges(
$attach_type,
$attach_obj,
$object_type,
$attached_phids);
}
}
private function writeOutboundEdges(
$object_type,
$object,
$attach_type,
array $attach_phids) {
switch ($object_type) {
case PhabricatorPHIDConstants::PHID_TYPE_DREV:
$object->setAttachedPHIDs($attach_type, $attach_phids);
$object->save();
break;
case PhabricatorPHIDConstants::PHID_TYPE_TASK:
$this->applyTaskTransaction(
$object,
$attach_type,
$attach_phids);
break;
}
}
private function applyTaskTransaction(
ManiphestTask $task,
$attach_type,
array $new_phids) {
if (!$this->user) {
throw new Exception("Call setUser() before editing attachments!");
}
$user = $this->user;
$editor = new ManiphestTransactionEditor();
$type = ManiphestTransactionType::TYPE_ATTACH;
$transaction = new ManiphestTransaction();
$transaction->setAuthorPHID($user->getPHID());
$transaction->setTransactionType($type);
$new = $task->getAttached();
$new[$attach_type] = array_fill_keys($new_phids, array());
$transaction->setNewValue($new);
$editor->applyTransactions($task, array($transaction));
}
}

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