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PhabricatorFeedQuery.php
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Sat, Dec 28, 19:50

PhabricatorFeedQuery.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.
*/
final class PhabricatorFeedQuery
extends PhabricatorCursorPagedPolicyAwareQuery {
private $filterPHIDs;
public function setFilterPHIDs(array $phids) {
$this->filterPHIDs = $phids;
return $this;
}
public function loadPage() {
$story_table = new PhabricatorFeedStoryData();
$conn = $story_table->establishConnection('r');
$data = queryfx_all(
$conn,
'SELECT story.* FROM %T story %Q %Q %Q %Q %Q',
$story_table->getTableName(),
$this->buildJoinClause($conn),
$this->buildWhereClause($conn),
$this->buildGroupClause($conn),
$this->buildOrderClause($conn),
$this->buildLimitClause($conn));
return $data;
}
protected function willFilterPage(array $data) {
return PhabricatorFeedStory::loadAllFromRows($data, $this->getViewer());
}
private function buildJoinClause(AphrontDatabaseConnection $conn_r) {
// NOTE: We perform this join unconditionally (even if we have no filter
// PHIDs) to omit rows which have no story references. These story data
// rows are notifications or realtime alerts.
$ref_table = new PhabricatorFeedStoryReference();
return qsprintf(
$conn_r,
'JOIN %T ref ON ref.chronologicalKey = story.chronologicalKey',
$ref_table->getTableName());
}
private function buildWhereClause(AphrontDatabaseConnection $conn_r) {
$where = array();
if ($this->filterPHIDs) {
$where[] = qsprintf(
$conn_r,
'ref.objectPHID IN (%Ls)',
$this->filterPHIDs);
}
$where[] = $this->buildPagingClause($conn_r);
return $this->formatWhereClause($where);
}
private function buildGroupClause(AphrontDatabaseConnection $conn_r) {
return qsprintf(
$conn_r,
'GROUP BY '.($this->filterPHIDs
? 'ref.chronologicalKey'
: 'story.chronologicalKey'));
}
protected function getPagingColumn() {
return ($this->filterPHIDs
? 'ref.chronologicalKey'
: 'story.chronologicalKey');
}
protected function getPagingValue($item) {
if ($item instanceof PhabricatorFeedStory) {
return $item->getChronologicalKey();
}
return $item['chronologicalKey'];
}
}

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