+#
+# Eingabe: Teilenummer, Lagerplatz_Id (bin_id)
+# Ausgabe: Die maximale Anzahl der Teile in diesem Lagerplatz
+# Bzw. Fehler, falls Chargen oder bestbefore
+# bei eingelagerten Teilen definiert sind.
+#
+sub get_max_qty_parts_bin {
+$main::lxdebug->enter_sub();
+
+ my $self = shift;
+ my %params = @_;
+
+ Common::check_params(\%params, qw(parts_id bin_id)); #die brauchen wir
+
+ my $myconfig = \%main::myconfig;
+ my $form = $main::form;
+
+ my $dbh = $params{dbh} || $form->get_standard_dbh();
+
+ my $query = qq| SELECT SUM(qty), chargenumber, bestbefore FROM inventory where parts_id = ?
+ AND bin_id = ? GROUP BY chargenumber, bestbefore|;
+
+ my $sth_QTY = prepare_execute_query($form, $dbh, $query, ,$params{parts_id}, $params{bin_id}); #info: aufruf an DBUtils.pm
+
+ my $max_qty_parts = 0; #Initialisierung mit 0
+ # falls derselbe artikel mehrmals eingelagert ist
+ # chargennummer, muss entsprechend händisch agiert werden
+ my $i = 0;
+ my $error;
+ while (my $ref = $sth_QTY->fetchrow_hashref()) { # wir laufen über alle Haltbarkeiten und Chargen(s.a. SQL-Query oben)
+ $max_qty_parts += $ref->{sum};
+ $i++;
+ if ($ref->{chargenumber} || $ref->{bestbefore}){
+ $error=1;
+ }
+ }
+ #if ($i < 1){
+ # $error = 2;
+ #}
+
+ $main::lxdebug->leave_sub();
+
+ return ($max_qty_parts, $error);
+}
+
+1;
+
+__END__
+
+=head1 NAME
+
+SL::WH - Warehouse backend
+
+=head1 SYNOPSIS
+
+ use SL::WH;
+ WH->transfer(\%params);
+
+=head1 DESCRIPTION
+
+Backend for lx-office warehousing functions.
+
+=head1 FUNCTIONS
+
+=head2 transfer \%PARAMS, [ \%PARAMS, ... ]
+
+This is the main function to manipulate warehouse contents. A typical transfer
+is called like this:
+
+ WH->transfer->({
+ parts_id => 6342,
+ qty => 12.45,
+ transfer_type => 'transfer',
+ src_warehouse_id => 12,
+ stc_bin_id => 23,
+ dst_warehouse_id => 25,
+ dst_bin_id => 167,
+ });
+
+It will generate an entry in inventory representing the transfer. Note that
+parts_id, qty, and transfer_type are mandatory. Depending on the transfer_type
+a destination or a src is mandatory.
+
+transfer accepts more than one transaction parameter, each being a hash ref. If
+more than one is supplied, it is guaranteed, that all are processed in the same
+transaction.
+
+Here is a full list of parameters. All "_id" parameters except oe and
+orderitems can be called without id with RDB objects as well.
+
+=over 4
+
+=item parts_id
+
+The id of the article transferred. Does not check if the article is a service.
+Mandatory.
+
+=item qty
+
+Quantity of the transaction. Mandatory.
+
+=item unit
+
+Unit of the transaction. Optional.
+
+=item transfer_type
+
+=item transfer_type_id
+
+The type of transaction. The first version is a string describing the
+transaction (the types 'transfer' 'in' 'out' and a few others are present on
+every system), the id is the hard id of a transfer_type from the database.
+
+Depending of the direction of the transfer_type, source and/or destination must
+be specified.
+
+One of transfer_type or transfer_type_id is mandatory.
+
+=item src_warehouse_id
+
+=item src_bin_id
+
+Warehouse and bin from which to transfer. Mandatory in transfer and out
+directions. Ignored in in directions.
+
+=item dst_warehouse_id
+
+=item dst_bin_id
+
+Warehouse and bin to which to transfer. Mandatory in transfer and in
+directions. Ignored in out directions.
+
+=item chargenumber
+
+If given, the transfer will transfer only articles with this chargenumber.
+Optional.
+
+=item orderitem_id
+
+Reference to an orderitem for which this transfer happened. Optional
+
+=item oe_id
+
+Reference to an order for which this transfer happened. Optional
+
+=item comment
+
+An optional comment.
+
+=item best_before
+
+An expiration date. Note that this is not by default used by C<warehouse_report>.
+
+=back
+
+=head1 BUGS
+
+None yet.
+
+=head1 AUTHOR