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phorge/src/infrastructure/query/offsetpaged/PhabricatorOffsetPagedQuery.php
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PhabricatorOffsetPagedQuery.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.
*/
/**
* A query class which uses offset/limit paging. Provides logic and accessors
* for offsets and limits.
*/
abstract class PhabricatorOffsetPagedQuery extends PhabricatorQuery {
private $offset;
private $limit;
final public function setOffset($offset) {
$this->offset = $offset;
return $this;
}
final public function setLimit($limit) {
$this->limit = $limit;
return $this;
}
final protected function buildLimitClause(AphrontDatabaseConnection $conn_r) {
if ($this->limit && $this->offset) {
return qsprintf($conn_r, 'LIMIT %d, %d', $this->offset, $this->limit);
} else if ($this->limit) {
return qsprintf($conn_r, 'LIMIT %d', $this->limit);
} else if ($this->offset) {
return qsprintf($conn_r, 'LIMIT %d, %d', $this->offset, PHP_INT_MAX);
} else {
return '';
}
}
final public function executeWithPager(AphrontPagerView $pager) {
$this->setLimit($pager->getPageSize() + 1);
$this->setOffset($pager->getOffset());
$results = $this->execute();
return $pager->sliceResults($results);
}
}

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