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phorge/src/applications/feed/query/PhabricatorFeedQuery.php
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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 {
private $filterPHIDs;
private $limit = 100;
private $after;
private $before;
public function setFilterPHIDs(array $phids) {
$this->filterPHIDs = $phids;
return $this;
}
public function setLimit($limit) {
$this->limit = $limit;
return $this;
}
public function setAfter($after) {
$this->after = $after;
return $this;
}
public function setBefore($before) {
$this->before = $before;
return $this;
}
public function execute() {
$ref_table = new PhabricatorFeedStoryReference();
$story_table = new PhabricatorFeedStoryData();
$conn = $story_table->establishConnection('r');
$where = array();
if ($this->filterPHIDs) {
$where[] = qsprintf(
$conn,
'ref.objectPHID IN (%Ls)',
$this->filterPHIDs);
}
// For "before" queries, we can just add a constraint to the WHERE clause.
// For "after" queries, we must also reverse the result ordering, since
// otherwise we'll always grab the first page of results if there's a limit.
// After MySQL applies the limit, we reverse the page in PHP (below) to
// ensure consistent ordering.
$order = 'DESC';
if ($this->after) {
$where[] = qsprintf(
$conn,
'ref.chronologicalKey > %s',
$this->after);
$order = 'ASC';
}
if ($this->before) {
$where[] = qsprintf(
$conn,
'ref.chronologicalKey < %s',
$this->before);
}
if ($where) {
$where = 'WHERE ('.implode(') AND (', $where).')';
} else {
$where = '';
}
$data = queryfx_all(
$conn,
'SELECT story.* FROM %T ref
JOIN %T story ON ref.chronologicalKey = story.chronologicalKey
%Q
GROUP BY story.chronologicalKey
ORDER BY story.chronologicalKey %Q
LIMIT %d',
$ref_table->getTableName(),
$story_table->getTableName(),
$where,
$order,
$this->limit);
if ($order != 'DESC') {
// If we did order ASC to pull 'after' data, reverse the result set so
// that stories are returned in a consistent (descending) order.
$data = array_reverse($data);
}
$data = $story_table->loadAllFromArray($data);
$stories = array();
foreach ($data as $story_data) {
$class = $story_data->getStoryType();
try {
if (!class_exists($class) ||
!is_subclass_of($class, 'PhabricatorFeedStory')) {
$class = 'PhabricatorFeedStoryUnknown';
}
} catch (PhutilMissingSymbolException $ex) {
// If the class can't be loaded, libphutil will throw an exception.
// Render the story using the unknown story view.
$class = 'PhabricatorFeedStoryUnknown';
}
$stories[] = newv($class, array($story_data));
}
return $stories;
}
}

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