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PhabricatorProjectColumnPositionQuery.php
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Created
Fri, Nov 22, 19:23

PhabricatorProjectColumnPositionQuery.php
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<?php
final class PhabricatorProjectColumnPositionQuery
extends PhabricatorCursorPagedPolicyAwareQuery {
private $ids;
private $boardPHIDs;
private $objectPHIDs;
private $columns;
private $needColumns;
private $skipImplicitCreate;
public function withIDs(array $ids) {
$this->ids = $ids;
return $this;
}
public function withBoardPHIDs(array $board_phids) {
$this->boardPHIDs = $board_phids;
return $this;
}
public function withObjectPHIDs(array $object_phids) {
$this->objectPHIDs = $object_phids;
return $this;
}
/**
* Find objects in specific columns.
*
* NOTE: Using this method activates logic which constructs virtual
* column positions for objects not in any column, if you pass a default
* column. Normally these results are not returned.
*
* @param list<PhabricatorProjectColumn> Columns to look for objects in.
* @return this
*/
public function withColumns(array $columns) {
assert_instances_of($columns, 'PhabricatorProjectColumn');
$this->columns = $columns;
return $this;
}
public function needColumns($need_columns) {
$this->needColumns = true;
return $this;
}
/**
* Skip implicit creation of column positions which are implied but do not
* yet exist.
*
* This is primarily useful internally.
*
* @param bool True to skip implicit creation of column positions.
* @return this
*/
public function setSkipImplicitCreate($skip) {
$this->skipImplicitCreate = $skip;
return $this;
}
// NOTE: For now, boards are always attached to projects. However, they might
// not be in the future. This generalization just anticipates a future where
// we let other types of objects (like users) have boards, or let boards
// contain other types of objects.
private function newPositionObject() {
return new PhabricatorProjectColumnPosition();
}
private function newColumnQuery() {
return new PhabricatorProjectColumnQuery();
}
private function getBoardMembershipEdgeTypes() {
return array(
PhabricatorProjectProjectHasObjectEdgeType::EDGECONST,
);
}
private function getBoardMembershipPHIDTypes() {
return array(
ManiphestTaskPHIDType::TYPECONST,
);
}
protected function loadPage() {
$table = $this->newPositionObject();
$conn_r = $table->establishConnection('r');
// We're going to find results by combining two queries: one query finds
// objects on a board column, while the other query finds objects not on
// any board column and virtually puts them on the default column.
$unions = array();
// First, find all the stuff that's actually on a column.
$unions[] = qsprintf(
$conn_r,
'SELECT * FROM %T %Q',
$table->getTableName(),
$this->buildWhereClause($conn_r));
// If we have a default column, find all the stuff that's not in any
// column and put it in the default column.
$must_type_filter = false;
if ($this->columns && !$this->skipImplicitCreate) {
$default_map = array();
foreach ($this->columns as $column) {
if ($column->isDefaultColumn()) {
$default_map[$column->getProjectPHID()] = $column->getPHID();
}
}
if ($default_map) {
$where = array();
// Find the edges attached to the boards we have default columns for.
$where[] = qsprintf(
$conn_r,
'e.src IN (%Ls)',
array_keys($default_map));
// Find only edges which describe a board relationship.
$where[] = qsprintf(
$conn_r,
'e.type IN (%Ld)',
$this->getBoardMembershipEdgeTypes());
if ($this->boardPHIDs !== null) {
// This should normally be redundant, but construct it anyway if
// the caller has told us to.
$where[] = qsprintf(
$conn_r,
'e.src IN (%Ls)',
$this->boardPHIDs);
}
if ($this->objectPHIDs !== null) {
$where[] = qsprintf(
$conn_r,
'e.dst IN (%Ls)',
$this->objectPHIDs);
}
$where[] = qsprintf(
$conn_r,
'p.id IS NULL');
$where = $this->formatWhereClause($where);
$unions[] = qsprintf(
$conn_r,
'SELECT NULL id, e.src boardPHID, NULL columnPHID, e.dst objectPHID,
0 sequence
FROM %T e LEFT JOIN %T p
ON e.src = p.boardPHID AND e.dst = p.objectPHID
%Q',
PhabricatorEdgeConfig::TABLE_NAME_EDGE,
$table->getTableName(),
$where);
$must_type_filter = true;
}
}
$data = queryfx_all(
$conn_r,
'%Q %Q %Q',
implode(' UNION ALL ', $unions),
$this->buildOrderClause($conn_r),
$this->buildLimitClause($conn_r));
// If we've picked up objects not in any column, we need to filter out any
// matched objects which have the wrong edge type.
if ($must_type_filter) {
$allowed_types = array_fuse($this->getBoardMembershipPHIDTypes());
foreach ($data as $id => $row) {
if ($row['columnPHID'] === null) {
$object_phid = $row['objectPHID'];
if (empty($allowed_types[phid_get_type($object_phid)])) {
unset($data[$id]);
}
}
}
}
$positions = $table->loadAllFromArray($data);
// Find the implied positions which don't exist yet. If there are any,
// we're going to create them.
$create = array();
foreach ($positions as $position) {
if ($position->getColumnPHID() === null) {
$column_phid = idx($default_map, $position->getBoardPHID());
$position->setColumnPHID($column_phid);
$create[] = $position;
}
}
if ($create) {
// If we're adding several objects to a column, insert the column
// position objects in object ID order. This means that newly added
// objects float to the top, and when a group of newly added objects
// float up at the same time, the most recently created ones end up
// highest in the list.
$objects = id(new PhabricatorObjectQuery())
->setViewer(PhabricatorUser::getOmnipotentUser())
->withPHIDs(mpull($create, 'getObjectPHID'))
->execute();
$objects = mpull($objects, null, 'getPHID');
$objects = msort($objects, 'getID');
$create = mgroup($create, 'getObjectPHID');
$create = array_select_keys($create, array_keys($objects)) + $create;
$unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
foreach ($create as $object_phid => $create_positions) {
foreach ($create_positions as $create_position) {
$create_position->save();
}
}
unset($unguarded);
}
return $positions;
}
protected function willFilterPage(array $page) {
if ($this->needColumns) {
$column_phids = mpull($page, 'getColumnPHID');
$columns = $this->newColumnQuery()
->setParentQuery($this)
->setViewer($this->getViewer())
->withPHIDs($column_phids)
->execute();
$columns = mpull($columns, null, 'getPHID');
foreach ($page as $key => $position) {
$column = idx($columns, $position->getColumnPHID());
if (!$column) {
unset($page[$key]);
continue;
}
$position->attachColumn($column);
}
}
return $page;
}
protected function buildWhereClause(AphrontDatabaseConnection $conn_r) {
$where = array();
if ($this->ids !== null) {
$where[] = qsprintf(
$conn_r,
'id IN (%Ld)',
$this->ids);
}
if ($this->boardPHIDs !== null) {
$where[] = qsprintf(
$conn_r,
'boardPHID IN (%Ls)',
$this->boardPHIDs);
}
if ($this->objectPHIDs !== null) {
$where[] = qsprintf(
$conn_r,
'objectPHID IN (%Ls)',
$this->objectPHIDs);
}
if ($this->columns !== null) {
$where[] = qsprintf(
$conn_r,
'columnPHID IN (%Ls)',
mpull($this->columns, 'getPHID'));
}
// NOTE: Explicitly not building the paging clause here, since it won't
// work with the UNION.
return $this->formatWhereClause($where);
}
public function getQueryApplicationClass() {
return 'PhabricatorProjectApplication';
}
}

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