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<?
/**
*
* This class is for internal use only, not a part of public API.
* It can be changed at any time without notification.
*
* @access private
* todo: create \Bitrix\Tasks\Internals\DataBase\Structure\ClosureMesh, and then make this class deprecated
*/
namespace Bitrix\Tasks\Internals\DataBase;
use \Bitrix\Main;
use \Bitrix\Main\DB;
use \Bitrix\Main\Entity;
use \Bitrix\Main\Localization\Loc;
use \Bitrix\Main\Application;
use \Bitrix\Main\Entity\AddResult;
use \Bitrix\Main\Entity\DeleteResult;
use Bitrix\Tasks\Util\Assert;
//Loc::loadMessages(__FILE__);
abstract class Mesh extends Tree
{
/**
* Links one item with another. Low-level method.
*/
public static function createLink($id, $parentId, $behaviour = array('LINK_DATA' => array()))
{
static::applyCreateRestrictions($id, $parentId);
if(!is_array($behaviour))
{
$behaviour = array();
}
if(!is_array($behaviour['LINK_DATA']))
{
$behaviour['LINK_DATA'] = array();
}
// check if parent exists. if not - add it
if(!static::insertEdge($parentId, $parentId, false, 0, array('INCREMENT_MP_WHEN_EXISTS' => false)))
{
static::throwExceptionCantAddEdge($parentId, $parentId, false);
}
// check if link to itself exists. if not - add it
if(!static::insertEdge($id, $id, false, 0, array('INCREMENT_MP_WHEN_EXISTS' => false)))
{
static::throwExceptionCantAddEdge($id, $id, false);
}
$fromPart = static::getParents($parentId);
$toPart = static::getChildren($id);
/*
print_r('Parent: ('.$parentId.')'.PHP_EOL);
print_r($fromPart);
print_r('Child: ('.$id.')'.PHP_EOL);
print_r($toPart);
*/
// link each child (including $id) to each parent (including $parentId)
foreach($fromPart as $parent)
{
foreach($toPart as $child)
{
$increment = 0;
$behaviourEdge = array();
if($parent['ID'] == $parentId && $child['ID'] == $id) // special, direct linking to parent
{
$direct = true;
$behaviourEdge = $behaviour;
}
else
{
$direct = false;
if(intval($parent['MPCITY']) > 1)
{
$increment += intval($parent['MPCITY']);
}
if(intval($child['MPCITY']) > 1)
{
$increment += intval($child['MPCITY']);
}
$behaviourEdge['INCREMENT_MP_WHEN_EXISTS'] = true;
}
//print_r('Make '.$parent['ID'].' => '.$child['ID'].' with MPCITY = '.$increment.' DIRECT = '.$direct.PHP_EOL);
if(!static::insertEdge($parent['ID'], $child['ID'], $direct, $increment, $behaviourEdge))
{
static::throwExceptionCantAddEdge($parent['ID'], $child['ID'], true);
}
}
}
return new AddResult();
}
public static function moveLink($id, $parentId, $behaviour = array('CREATE_PARENT_NODE_ON_NOTFOUND' => true))
{
throw new \Bitrix\Main\NotImplementedException();
}
/**
* Breaks link between nodes. Low-level method.
*/
public static function deleteLink($id, $parentId = false, array $behaviour = array('CHILDREN' => 'unlink'))
{
static::applyDeleteRestrictions($id, $parentId);
$fromPart = static::getParents($parentId);
$toPart = static::getChildren($id);
// UNlink each child (including $id) from each parent (including $parentId)
foreach($fromPart as $parent)
{
foreach($toPart as $child)
{
$decrement = 0;
if($parent['ID'] == $parentId && $child['ID'] == $id) // special, direct linking to parent
{
}
else
{
if(intval($parent['MPCITY']) > 1)
{
$decrement += intval($parent['MPCITY']);
}
if(intval($child['MPCITY']) > 1)
{
$decrement += intval($child['MPCITY']);
}
}
//print_r('UnMake '.$parent['ID'].' => '.$child['ID'].' with MPCITY = '.$decrement.PHP_EOL);
static::markEdgeToRemove($parent['ID'], $child['ID'], $decrement);
}
}
static::deleteMarkedEdges();
return new DeleteResult();
}
protected static function throwExceptionCantAddEdge($from, $to, $direct, $type = '')
{
throw new \Bitrix\Tasks\Exception('Can not add a new edge', array('AUX' => array('MESSAGE' => array('FROM' => $from, 'TO' => $to, 'DIRECT' => $direct, 'TYPE' => $type))));
}
/**
* Check if the item is linked with some other items
*/
public static function checkItemLinked($id)
{
global $DB;
$id = Assert::expectIntegerPositive($id, '$id');
$directCN = static::getDIRECTColumnName();
$idCN = static::getIDColumnName();
$parentCN = static::getPARENTIDColumnName();
$item = $DB->query("
select
1
from
".static::getTableName()."
where
(".$directCN." = '1' and ".$idCN." = '".$id."')
or
(".$directCN." = '1' and ".$parentCN." = '".$id."')
")->fetch();
return !empty($item);
}
protected static function applyDeleteRestrictions(&$id, &$parentId)
{
$id = Assert::expectIntegerPositive($id, '$id');
if($parentId !== false) // parent id === false means that all links with all parents will be broken
{
$parentId = Assert::expectIntegerPositive($parentId, '$parentId');
}
if(!static::checkNodeExists($id))
{
throw new Tree\TargetNodeNotFoundException(false, array('NODES' => array($id)));
}
if($parentId !== false && !static::checkLinkExists($id, $parentId))
{
throw new Tree\LinkNotExistException(false, array('NODES' => array($id, $parentId)));
}
}
private static function getParents($id)
{
$idColName = static::getIDColumnName();
$parentIdColName = static::getPARENTIDColumnName();
$mpcityColName = static::getMPCITYColumnName();
$fromPart = array();
$res = static::getList(array('filter' => array($idColName => $id), 'select' => array('ID' => $parentIdColName, $mpcityColName)));
while($item = $res->fetch())
{
$fromPart[] = $item;
}
return $fromPart;
}
private static function getChildren($id)
{
$idColName = static::getIDColumnName();
$mpcityColName = static::getMPCITYColumnName();
$toPart = array();
$res = static::getSubTree($id, array('select' => array('ID' => $idColName, $mpcityColName)));
while($item = $res->fetch())
{
$toPart[] = $item;
}
return $toPart;
}
private static function insertEdge($from, $to, $direct = true, $increment = 0, array $behaviour = array('INCREMENT_MP_WHEN_EXISTS' => true))
{
//$behaviour['LINK_DATA']
$connection = Application::getConnection();
$helper = $connection->getSqlHelper();
$idColName = static::getIDColumnName();
$parentIdColName = static::getPARENTIDColumnName();
$mpcityColName = static::getMPCITYColumnName();
$directColName = static::getDIRECTColumnName();
$additionalFldsMap = array();
$additionalFldsValues = array();
if(is_array($behaviour['LINK_DATA']) && !empty($behaviour['LINK_DATA']))
{
$additionalFldsMap = array_keys($behaviour['LINK_DATA']);
$additionalFldsValues = $behaviour['LINK_DATA'];
}
$values = array_merge(array(
$idColName => $to,
$parentIdColName => $from,
$directColName => $direct,
$mpcityColName => $increment > 0 ? $increment : 1,
), $additionalFldsValues);
if($behaviour['INCREMENT_MP_WHEN_EXISTS'] === true)
{
$plus = '+'.($increment > 0 ? $increment : '1');
}
else
{
$plus = '';
}
$merge = $helper->prepareMerge(
static::getTableName(),
array($idColName, $parentIdColName), // primary key
$values,
array(
$mpcityColName => new \Bitrix\Main\DB\SqlExpression($mpcityColName.$plus),
)
);
if ($merge[0] != "")
{
$connection->query($merge[0]);
return true;
}
return false;
}
private static function markEdgeToRemove($from, $to, $decrement = 0)
{
if($decrement == 0)
{
$decrement = 1;
}
$idColName = static::getIDColumnName();
$parentIdColName = static::getPARENTIDColumnName();
$mpcityColName = static::getMPCITYColumnName();
Application::getConnection()->query("
update ".static::getTableName()." set ".$mpcityColName." = ".$mpcityColName." - ".intval($decrement)." where ".$idColName." = '".$to."' and ".$parentIdColName." = '".$from."'
");
}
private static function deleteMarkedEdges()
{
$mpcityColName = static::getMPCITYColumnName();
$sql = "
delete
from ".static::getTableName()."
where
".$mpcityColName." <= '0'
";
Application::getConnection()->query($sql);
}
protected static function applyCreateRestrictions(&$id, &$parentId)
{
$id = Assert::expectIntegerPositive($id, '$id');
$parentId = Assert::expectIntegerNonNegative($parentId, '$parentId'); // parent id might be equal to 0
if(static::checkLinkExists($id, $parentId))
{
throw new Tree\LinkExistsException(false, array('NODES' => array($id, $parentId)));
}
}
public static function getMPCITYColumnName()
{
return 'MPCITY';
}
/**
* Returns entity map definition.
*
* @return array
*/
public static function getMap()
{
// to avoid warnings in php7
$entityName = '';
if(func_num_args() > 0)
{
$entityName = func_get_arg(0);
}
$map = parent::getMap($entityName);
return array_merge($map, array(
new Entity\IntegerField(static::getMPCITYColumnName(), array(
))
));
}
}