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phab/src/applications/maniphest/query/ManiphestTaskQuery.php
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ManiphestTaskQuery.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.
*/
/**
* Query tasks by specific criteria. This class uses the higher-performance
* but less-general Maniphest indexes to satisfy queries.
*
* @group maniphest
*/
final class ManiphestTaskQuery {
private $taskIDs = array();
private $authorPHIDs = array();
private $ownerPHIDs = array();
private $includeUnowned = null;
private $projectPHIDs = array();
private $xprojectPHIDs = array();
private $subscriberPHIDs = array();
private $anyProject = false;
private $includeNoProject = null;
private $status = 'status-any';
const STATUS_ANY = 'status-any';
const STATUS_OPEN = 'status-open';
const STATUS_CLOSED = 'status-closed';
private $priority = null;
private $groupBy = 'group-none';
const GROUP_NONE = 'group-none';
const GROUP_PRIORITY = 'group-priority';
const GROUP_OWNER = 'group-owner';
const GROUP_STATUS = 'group-status';
const GROUP_PROJECT = 'group-project';
private $orderBy = 'order-modified';
const ORDER_PRIORITY = 'order-priority';
const ORDER_CREATED = 'order-created';
const ORDER_MODIFIED = 'order-modified';
private $limit = null;
const DEFAULT_PAGE_SIZE = 1000;
private $offset = 0;
private $calculateRows = false;
private $rowCount = null;
public function withAuthors(array $authors) {
$this->authorPHIDs = $authors;
return $this;
}
public function withTaskIDs(array $ids) {
$this->taskIDs = $ids;
return $this;
}
public function withOwners(array $owners) {
$this->includeUnowned = false;
foreach ($owners as $k => $phid) {
if ($phid == ManiphestTaskOwner::OWNER_UP_FOR_GRABS) {
$this->includeUnowned = true;
unset($owners[$k]);
break;
}
}
$this->ownerPHIDs = $owners;
return $this;
}
public function withProjects(array $projects) {
$this->includeNoProject = false;
foreach ($projects as $k => $phid) {
if ($phid == ManiphestTaskOwner::PROJECT_NO_PROJECT) {
$this->includeNoProject = true;
unset($projects[$k]);
}
}
$this->projectPHIDs = $projects;
return $this;
}
public function withoutProjects(array $projects) {
$this->xprojectPHIDs = $projects;
return $this;
}
public function withStatus($status) {
$this->status = $status;
return $this;
}
public function withPriority($priority) {
$this->priority = $priority;
return $this;
}
public function withSubscribers(array $subscribers) {
$this->subscriberPHIDs = $subscribers;
return $this;
}
public function setGroupBy($group) {
$this->groupBy = $group;
return $this;
}
public function setOrderBy($order) {
$this->orderBy = $order;
return $this;
}
public function setLimit($limit) {
$this->limit = $limit;
return $this;
}
public function setOffset($offset) {
$this->offset = $offset;
return $this;
}
public function setCalculateRows($calculate_rows) {
$this->calculateRows = $calculate_rows;
return $this;
}
public function getRowCount() {
if ($this->rowCount === null) {
throw new Exception(
"You must execute a query with setCalculateRows() before you can ".
"retrieve a row count.");
}
return $this->rowCount;
}
public function withAnyProject($any_project) {
$this->anyProject = $any_project;
return $this;
}
public function execute() {
$task_dao = new ManiphestTask();
$conn = $task_dao->establishConnection('r');
if ($this->calculateRows) {
$calc = 'SQL_CALC_FOUND_ROWS';
} else {
$calc = '';
}
$where = array();
$where[] = $this->buildTaskIDsWhereClause($conn);
$where[] = $this->buildStatusWhereClause($conn);
$where[] = $this->buildPriorityWhereClause($conn);
$where[] = $this->buildAuthorWhereClause($conn);
$where[] = $this->buildOwnerWhereClause($conn);
$where[] = $this->buildSubscriberWhereClause($conn);
$where[] = $this->buildProjectWhereClause($conn);
$where[] = $this->buildXProjectWhereClause($conn);
$where = array_filter($where);
if ($where) {
$where = 'WHERE ('.implode(') AND (', $where).')';
} else {
$where = '';
}
$join = array();
$join[] = $this->buildProjectJoinClause($conn);
$join[] = $this->buildXProjectJoinClause($conn);
$join[] = $this->buildSubscriberJoinClause($conn);
$join = array_filter($join);
if ($join) {
$join = implode(' ', $join);
} else {
$join = '';
}
$having = '';
$count = '';
$group = '';
if (count($this->projectPHIDs) > 1) {
// If we're searching for more than one project:
// - We'll get multiple rows for tasks when they join the project table
// multiple times. We use GROUP BY to make them distinct again.
// - We want to treat the query as an intersection query, not a union
// query. We sum the project count and require it be the same as the
// number of projects we're searching for. (If 'anyProject' is set,
// we do union instead.)
$group = 'GROUP BY task.id';
if (!$this->anyProject) {
$count = ', COUNT(project.projectPHID) projectCount';
$having = qsprintf(
$conn,
'HAVING projectCount = %d',
count($this->projectPHIDs));
}
}
$order = $this->buildOrderClause($conn);
$offset = (int)nonempty($this->offset, 0);
$limit = (int)nonempty($this->limit, self::DEFAULT_PAGE_SIZE);
if ($this->groupBy == self::GROUP_PROJECT) {
$limit = PHP_INT_MAX;
$offset = 0;
}
$data = queryfx_all(
$conn,
'SELECT %Q * %Q FROM %T task %Q %Q %Q %Q %Q LIMIT %d, %d',
$calc,
$count,
$task_dao->getTableName(),
$join,
$where,
$group,
$having,
$order,
$offset,
$limit);
if ($this->calculateRows) {
$count = queryfx_one(
$conn,
'SELECT FOUND_ROWS() N');
$this->rowCount = $count['N'];
} else {
$this->rowCount = null;
}
$tasks = $task_dao->loadAllFromArray($data);
if ($this->groupBy == self::GROUP_PROJECT) {
$tasks = $this->applyGroupByProject($tasks);
}
return $tasks;
}
private function buildTaskIDsWhereClause($conn) {
if (!$this->taskIDs) {
return null;
}
return qsprintf(
$conn,
'id in (%Ld)',
$this->taskIDs);
}
private function buildStatusWhereClause($conn) {
switch ($this->status) {
case self::STATUS_ANY:
return null;
case self::STATUS_OPEN:
return 'status = 0';
case self::STATUS_CLOSED:
return 'status > 0';
default:
throw new Exception("Unknown status query '{$this->status}'!");
}
}
private function buildPriorityWhereClause($conn) {
if ($this->priority === null) {
return null;
}
return qsprintf(
$conn,
'priority = %d',
$this->priority);
}
private function buildAuthorWhereClause($conn) {
if (!$this->authorPHIDs) {
return null;
}
return qsprintf(
$conn,
'authorPHID in (%Ls)',
$this->authorPHIDs);
}
private function buildOwnerWhereClause($conn) {
if (!$this->ownerPHIDs) {
if ($this->includeUnowned === null) {
return null;
} else if ($this->includeUnowned) {
return qsprintf(
$conn,
'ownerPHID IS NULL');
} else {
return qsprintf(
$conn,
'ownerPHID IS NOT NULL');
}
}
if ($this->includeUnowned) {
return qsprintf(
$conn,
'ownerPHID IN (%Ls) OR ownerPHID IS NULL',
$this->ownerPHIDs);
} else {
return qsprintf(
$conn,
'ownerPHID IN (%Ls)',
$this->ownerPHIDs);
}
}
private function buildSubscriberWhereClause($conn) {
if (!$this->subscriberPHIDs) {
return null;
}
return qsprintf(
$conn,
'subscriber.subscriberPHID IN (%Ls)',
$this->subscriberPHIDs);
}
private function buildProjectWhereClause($conn) {
if (!$this->projectPHIDs && !$this->includeNoProject) {
return null;
}
$parts = array();
if ($this->projectPHIDs) {
$parts[] = qsprintf(
$conn,
'project.projectPHID in (%Ls)',
$this->projectPHIDs);
}
if ($this->includeNoProject) {
$parts[] = qsprintf(
$conn,
'project.projectPHID IS NULL');
}
return '('.implode(') OR (', $parts).')';
}
private function buildProjectJoinClause($conn) {
if (!$this->projectPHIDs && !$this->includeNoProject) {
return null;
}
$project_dao = new ManiphestTaskProject();
return qsprintf(
$conn,
'%Q JOIN %T project ON project.taskPHID = task.phid',
($this->includeNoProject ? 'LEFT' : ''),
$project_dao->getTableName());
}
private function buildXProjectWhereClause($conn) {
if (!$this->xprojectPHIDs) {
return null;
}
return qsprintf(
$conn,
'xproject.projectPHID IS NULL');
}
private function buildXProjectJoinClause($conn) {
if (!$this->xprojectPHIDs) {
return null;
}
$project_dao = new ManiphestTaskProject();
return qsprintf(
$conn,
'LEFT JOIN %T xproject ON xproject.taskPHID = task.phid
AND xproject.projectPHID IN (%Ls)',
$project_dao->getTableName(),
$this->xprojectPHIDs);
}
private function buildSubscriberJoinClause($conn) {
if (!$this->subscriberPHIDs) {
return null;
}
$subscriber_dao = new ManiphestTaskSubscriber();
return qsprintf(
$conn,
'JOIN %T subscriber ON subscriber.taskPHID = task.phid',
$subscriber_dao->getTableName());
}
private function buildOrderClause($conn) {
$order = array();
switch ($this->groupBy) {
case self::GROUP_NONE:
break;
case self::GROUP_PRIORITY:
$order[] = 'priority';
break;
case self::GROUP_OWNER:
$order[] = 'ownerOrdering';
break;
case self::GROUP_STATUS:
$order[] = 'status';
break;
case self::GROUP_PROJECT:
// NOTE: We have to load the entire result set and apply this grouping
// in the PHP process for now.
break;
default:
throw new Exception("Unknown group query '{$this->groupBy}'!");
}
switch ($this->orderBy) {
case self::ORDER_PRIORITY:
$order[] = 'priority';
$order[] = 'subpriority';
$order[] = 'dateModified';
break;
case self::ORDER_CREATED:
$order[] = 'id';
break;
case self::ORDER_MODIFIED:
$order[] = 'dateModified';
break;
default:
throw new Exception("Unknown order query '{$this->orderBy}'!");
}
$order = array_unique($order);
if (empty($order)) {
return null;
}
foreach ($order as $k => $column) {
switch ($column) {
case 'subpriority':
case 'ownerOrdering':
$order[$k] = "task.{$column} ASC";
break;
default:
$order[$k] = "task.{$column} DESC";
break;
}
}
return 'ORDER BY '.implode(', ', $order);
}
/**
* To get paging to work for "group by project", we need to do a bunch of
* server-side magic since there's currently no way to sort by project name on
* the database.
*
* TODO: Move this all to the database.
*/
private function applyGroupByProject(array $tasks) {
assert_instances_of($tasks, 'ManiphestTask');
$project_phids = array();
foreach ($tasks as $task) {
foreach ($task->getProjectPHIDs() as $phid) {
$project_phids[$phid] = true;
}
}
$handles = id(new PhabricatorObjectHandleData(array_keys($project_phids)))
->loadHandles();
$max = 1;
foreach ($handles as $handle) {
$max = max($max, strlen($handle->getName()));
}
$items = array();
$ii = 0;
foreach ($tasks as $key => $task) {
$phids = $task->getProjectPHIDs();
if (!$this->anyProject && $this->projectPHIDs) {
$phids = array_diff($phids, $this->projectPHIDs);
}
if ($phids) {
foreach ($phids as $phid) {
$items[] = array(
'key' => $key,
'seq' => sprintf(
'%'.$max.'s%d',
$handles[$phid]->getName(),
$ii),
);
}
} else {
// Sort "no project" tasks first.
$items[] = array(
'key' => $key,
'seq' => '',
);
}
++$ii;
}
$items = isort($items, 'seq');
$items = array_slice(
$items,
nonempty($this->offset),
nonempty($this->limit, self::DEFAULT_PAGE_SIZE));
$result = array();
foreach ($items as $item) {
$result[] = $tasks[$item['key']];
}
return $result;
}
}
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