Stages::moveTask

public function moveTask($id, $stageId, $before = 0, $after = 0)
{
	$success = null;
	$id = (int)$id;
	$stageId = (int)$stageId;
	// check stage
	if (!($stage = StagesTable::getById($stageId)->fetch()))
	{
		$this->errors->add(
			'NOT_FOUND',
			Loc::getMessage('STAGES_ERROR_NOT_FOUND')
		);
	}
	// chec access to task
	if ($this->errors->checkNoFatals())
	{
		$task = CTasks::getList(
			array(
				//
			),
			array(
				'ID' => $id,
				'CHECK_PERMISSIONS' => 'Y'
			),
			array(
				'ID', 'GROUP_ID'
			)
		)->fetch();
		if (!$task)
		{
			$this->errors->add(
				'TASK_NOT_FOUND',
				Loc::getMessage('STAGES_ERROR_TASK_NOT_FOUND')
			);
		}
	}

	if ($this->errors->checkNoFatals() && Loader::includeModule('socialnetwork'))
	{
		$group = Workgroup::getById($task['GROUP_ID']);
		$isScrumTask = ($group && $group->isScrumProject());
		if ($isScrumTask)
		{
			return $this->moveScrumTask($id, $task['GROUP_ID'], $stage);
		}
	}

	// chec access to sort
	if ($this->errors->checkNoFatals())
	{
		$this->canSortTask(
			$stage['ENTITY_ID'],
			$stage['ENTITY_TYPE']
		);
	}
	// check if new and old stages in different Kanbans
	if ($this->errors->checkNoFatals())
	{
		if (
			$stage['ENTITY_TYPE'] == StagesTable::WORK_MODE_GROUP &&
			$task['GROUP_ID'] != $stage['ENTITY_ID']
		)
		{
			$this->errors->add(
				'DIFFERENT_STAGES',
				Loc::getMessage('STAGES_ERROR_DIFFERENT_STAGES')
			);
		}
	}

	// no errors - move task
	if ($this->errors->checkNoFatals())
	{
		if ($stage['ENTITY_TYPE'] == StagesTable::WORK_MODE_GROUP)
		{
			$taskObj = new CTasks;
			$taskObj->update($task['ID'], array(
				'STAGE_ID' => $stageId
			));
		}
		else
		{
			$resStg = TaskStageTable::getList(array(
				'filter' => array(
					'TASK_ID' => $id,
					'=STAGE.ENTITY_TYPE' => StagesTable::WORK_MODE_USER,
					'STAGE.ENTITY_ID' => $stage['ENTITY_ID']
				)
			));
			while ($rowStg = $resStg->fetch())
			{
				TaskStageTable::update($rowStg['ID'], array(
					'STAGE_ID' => $stageId
				));

				if ($stageId !== (int)$rowStg['STAGE_ID'])
				{
					BizprocListener::onPlanTaskStageUpdate(
						$stage['ENTITY_ID'],
						$rowStg['TASK_ID'],
						$stageId
					);
				}
			}
		}
		$success = true;
	}
	// and set sorting
	$sortingGroup = $stage['ENTITY_TYPE'] == StagesTable::WORK_MODE_GROUP
		? $task['GROUP_ID']
		: 0;
	// pin in new stage
	if ($before == 0 && $after == 0)
	{
		StagesTable::pinInTheStage($id, $stageId);
	}
	elseif ($before > 0)
	{
		SortingTable::setSorting(
			UtilUser::getId(),
			$sortingGroup,
			$id,
			$before,
			true
		);
	}
	elseif ($after > 0)
	{
		SortingTable::setSorting(
			UtilUser::getId(),
			$sortingGroup,
			$id,
			$after,
			false
		);
	}

	return $success;
}