$cmd = new \MongoDB\Driver\Command( [
'findAndModify' => 'checkins',
'query' => [ '_id' => new \MongoDB\BSON\ObjectID( $this->_id ) ],
'update' => [
*'$addToSet'* => [
"clinked_by" => [ 'slug' => $user->slug, 'name' => $user->fullname ]
],
*'$inc' => [ "clinked_count.{$user_slug}" => 1 ]*
],
*'new' => true,*
] );
$cursor = $manager->executeCommand( 'dramio', $cmd );
*$cursor->setTypeMap(* [ 'document' => '\Dram\Checkin' ] );
$result = $cursor->toArray()[0];
return [
'newCheckin' => $result->value,
*'clinkedNew' => $result->value->clinked_count->{$user->slug} == 1,*
*'clinked' => ($result->value->clinked_count->{$user->slug} % 2) == 1*
];
