TaskRemoveRule::execute

public function execute(AccessibleItem $task = null, $params = null): bool
{
	if (!$task)
	{
		$this->controller->addError(static::class, 'Incorrect task');
		return false;
	}

	if ($this->user->isAdmin())
	{
		return true;
	}

	if (
		$task->isMember($this->user->getUserId(), RoleDictionary::ROLE_DIRECTOR)
		&& $this->user->getPermission(PermissionDictionary::TASK_DIRECTOR_DELETE)
	)
	{
		return true;
	}

	if (array_intersect($task->getMembers(RoleDictionary::ROLE_DIRECTOR), $this->user->getAllSubordinates()))
	{
		return true;
	}

	$isInDepartment = $task->isInDepartment($this->user->getUserId(), false, [RoleDictionary::ROLE_RESPONSIBLE, RoleDictionary::ROLE_DIRECTOR, RoleDictionary::ROLE_ACCOMPLICE]);

	if (
		$this->user->getPermission(PermissionDictionary::TASK_DEPARTMENT_DELETE)
		&& $isInDepartment
	)
	{
		return true;
	}

	if (
		$this->user->getPermission(PermissionDictionary::TASK_NON_DEPARTMENT_DELETE)
		&& !$isInDepartment
	)
	{
		return true;
	}

	// task not in group
	if (!$task->getGroupId())
	{
		$this->controller->addError(static::class, 'Unable to load group info');
		return false;
	}

	// task in group
	if (!Loader::includeModule("socialnetwork"))
	{
		$this->controller->addError(static::class, 'Unable to load socialnetwork');
		return false;
	}

	if (!BitrixSocialnetworkInternalsRegistryFeaturePermRegistry::getInstance()->get(
		$task->getGroupId(),
		'tasks',
		'delete_tasks',
		$this->user->getUserId()
	))
	{
		$this->controller->addError(static::class, 'Access to remove denied by group');
		return false;
	}

	return true;
}