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phorge/src/infrastructure/query/policy/base/PhabricatorPolicyQuery.php
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PhabricatorPolicyQuery.php
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<?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.
*/
abstract class PhabricatorPolicyQuery extends PhabricatorQuery {
private $limit;
private $viewer;
private $raisePolicyExceptions;
final public function setViewer($viewer) {
$this->viewer = $viewer;
return $this;
}
final public function getViewer() {
return $this->viewer;
}
final public function setLimit($limit) {
$this->limit = $limit;
return $this;
}
final public function getLimit() {
return $this->limit;
}
final public function executeOne() {
$this->raisePolicyExceptions = true;
try {
$results = $this->execute();
} catch (Exception $ex) {
$this->raisePolicyExceptions = false;
throw $ex;
}
if (count($results) > 1) {
throw new Exception("Expected a single result!");
}
return head($results);
}
final public function execute() {
if (!$this->viewer) {
throw new Exception("Call setViewer() before execute()!");
}
$results = array();
$filter = new PhabricatorPolicyFilter();
$filter->setViewer($this->viewer);
$filter->setCapability(PhabricatorPolicyCapability::CAN_VIEW);
$filter->raisePolicyExceptions($this->raisePolicyExceptions);
do {
$page = $this->loadPage();
$visible = $filter->apply($page);
foreach ($visible as $key => $result) {
$results[$key] = $result;
if ($this->getLimit() && count($results) >= $this->getLimit()) {
break 2;
}
}
if (!$this->getLimit() || (count($page) < $this->getLimit())) {
break;
}
$this->nextPage($page);
} while (true);
return $results;
}
abstract protected function loadPage();
abstract protected function nextPage(array $page);
}

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