+package SL::Controller::Inventory;
+
+use strict;
+use warnings;
+
+use parent qw(SL::Controller::Base);
+
+use SL::DB::Inventory;
+use SL::DB::Part;
+use SL::DB::Warehouse;
+use SL::DB::Unit;
+use SL::WH;
+use SL::Locale::String qw(t8);
+use SL::ClientJS;
+use SL::Presenter;
+use SL::DBUtils;
+use SL::Helper::Flash;
+
+use Rose::Object::MakeMethods::Generic (
+  'scalar --get_set_init' => [ qw(warehouses units js p) ],
+  'scalar'                => [ qw(warehouse bin unit part) ],
+);
+
+__PACKAGE__->run_before('_check_auth');
+__PACKAGE__->run_before('_check_warehouses');
+__PACKAGE__->run_before('load_part_from_form',   only => [ qw(stock_in part_changed mini_stock stock) ]);
+__PACKAGE__->run_before('load_unit_from_form',   only => [ qw(stock_in part_changed mini_stock stock) ]);
+__PACKAGE__->run_before('load_wh_from_form',     only => [ qw(stock_in warehouse_changed stock) ]);
+__PACKAGE__->run_before('load_bin_from_form',    only => [ qw(stock_in stock) ]);
+__PACKAGE__->run_before('set_target_from_part',  only => [ qw(part_changed) ]);
+__PACKAGE__->run_before('sanitize_target',       only => [ qw(stock_in warehouse_changed part_changed) ]);
+__PACKAGE__->run_before('set_layout');
+
+sub action_stock_in {
+  my ($self) = @_;
+
+  $::form->{title}   = t8('Stock');
+
+  $::request->layout->focus('#part_id_name');
+  $_[0]->render('inventory/warehouse_selection_stock', title => $::form->{title});
+}
+
+sub action_stock {
+  my ($self) = @_;
+
+  # do stock
+  WH->transfer({
+    parts         => $self->part,
+    dst_bin       => $self->bin,
+    dst_wh        => $self->warehouse,
+    qty           => $::form->format_amount(\%::myconfig, $::form->{qty}),
+    unit          => $self->unit,
+    transfer_type => 'stock',
+    chargenumber  => $::form->{chargenumber},
+    ean           => $::form->{ean},
+    comment       => $::form->{comment},
+  });
+
+  if ($::form->{write_default_bin}) {
+    $self->part->bin($self->bin);
+    $self->part->warehouse($self->warehouse);
+    $self->part->save;
+  }
+
+  flash_later('info', t8('Transfer successful'));
+
+  # redirect
+  $self->redirect_to(
+    action       => 'stock_in',
+    part_id      => $self->part->id,
+    bin_id       => $self->bin->id,
+    warehouse_id => $self->warehouse->id,
+  );
+}
+
+sub action_part_changed {
+  my ($self) = @_;
+
+  # no standard? ask user if he wants to write it
+  if ($self->part->id && !$self->part->bin_id && !$self->part->warehouse_id) {
+    $self->js->show('#write_default_bin_span');
+  } else {
+    $self->js->hide('#write_default_bin_span')
+             ->removeAttr('#write_default_bin', 'checked');
+  }
+
+  $self->js
+    ->replaceWith('#warehouse_id', $self->build_warehouse_select)
+    ->replaceWith('#bin_id', $self->build_bin_select)
+    ->replaceWith('#unit_id', $self->build_unit_select)
+    ->focus('#warehouse_id')
+    ->render($self);
+}
+
+sub action_warehouse_changed {
+  my ($self) = @_;
+
+  $self->js
+    ->replaceWith('#bin_id', $self->build_bin_select)
+    ->focus('#bin_id')
+    ->render($self);
+}
+
+sub action_mini_stock {
+  my ($self) = @_;
+
+  my $stock        = $self->part->get_simple_stock;
+  my $stock_by_bin = { map { $_->{bin_id} => $_ } @$stock };
+  my $stock_empty  = ! grep { $_->{sum} * 1 } @$stock;
+
+  $self->js
+    ->html('#stock', $self->render('inventory/_stock', { output => 0 }, stock => $stock_by_bin, stock_empty => $stock_empty ))
+    ->render($self);
+}
+
+sub action_last_journal {
+  my ($self) = @_;
+
+#  my $jounal = $self->journal;
+
+}
+
+#================================================================
+
+sub _check_auth {
+  $main::auth->assert('warehouse_management');
+}
+
+sub _check_warehouses {
+  $_[0]->show_no_warehouses_error if !@{ $_[0]->warehouses };
+}
+
+sub init_warehouses {
+  SL::DB::Manager::Warehouse->get_all;
+}
+
+sub init_units {
+  SL::DB::Manager::Unit->get_all;
+}
+
+sub init_js {
+  SL::ClientJS->new;
+}
+
+sub init_p {
+  SL::Presenter->get;
+}
+
+sub set_target_from_part {
+  my ($self) = @_;
+
+  return if !$self->part;
+
+  $self->warehouse($self->part->warehouse) if $self->part->warehouse;
+  $self->bin(      $self->part->bin)       if $self->part->bin;
+}
+
+sub sanitize_target {
+  my ($self) = @_;
+
+  $self->warehouse(SL::DB::Manager::Warehouse->get_first) if !$self->warehouse || !$self->warehouse->id;
+  $self->bin      ($self->warehouse->bins->[0])           if !$self->bin       || !$self->bin->id;
+}
+
+sub load_part_from_form {
+  $_[0]->part(SL::DB::Manager::Part->find_by_or_create(id => $::form->{part_id}));
+}
+
+sub load_unit_from_form {
+  $_[0]->unit(SL::DB::Manager::Unit->find_by_or_create(id => $::form->{unit_id}));
+}
+
+sub load_wh_from_form {
+  $_[0]->warehouse(SL::DB::Manager::Warehouse->find_by_or_create(id => $::form->{warehouse_id}));
+}
+
+sub load_bin_from_form {
+  $_[0]->bin(SL::DB::Manager::Bin->find_by_or_create(id => $::form->{bin_id}));
+}
+
+sub set_layout {
+  $::request->layout->add_javascripts('client_js.js');
+}
+
+sub build_warehouse_select {
+ $_[0]->p->select_tag('warehouse_id', $_[0]->warehouses,
+   title_key => 'description',
+   default   => $_[0]->warehouse->id,
+   onchange  => 'reload_bin_selection()',
+  )
+}
+
+sub build_bin_select {
+  $_[0]->p->select_tag('bin_id', [ $_[0]->warehouse->bins ],
+    title_key => 'description',
+    default   => $_[0]->bin->id,
+  );
+}
+
+sub build_unit_select {
+  $_[0]->part->id
+    ? $_[0]->p->select_tag('unit_id', $_[0]->part->available_units,
+        title_key => 'name',
+        default   => $_[0]->part->unit_obj->id,
+      )
+    : $_[0]->p->select_tag('unit_id', $_[0]->units,
+        title_key => 'name',
+      )
+}
+
+sub mini_journal {
+  my ($self) = @_;
+
+  # get last 10 transaction ids
+  my $query = 'SELECT trans_id, max(itime) FROM inventory GROUP BY trans_id ORDER BY max(itime) DESC LIMIT 10';
+  my @ids = selectall_array_query($::form, $::form->get_standard_dbh, $query);
+
+  my $objs = SL::DB::Manager::Inventory->get_all(query => [ trans_id => \@ids ]);
+
+  # at most 2 of them belong to a transaction and the qty determins in or out.
+  # sort them for display
+  my %transactions;
+  for (@$objs) {
+    $transactions{ $_->trans_id }{ $_->qty > 0 ? 'in' : 'out' } = $_;
+    $transactions{ $_->trans_id }{base} = $_;
+  }
+  # and get them into order again
+  my @sorted = map { $transactions{$_} } @ids;
+
+  return \@sorted;
+}
+
+sub show_no_warehouse_error {
+  my ($self) = @_;
+
+  my $msg = t8('No warehouse has been created yet or the quantity of the bins is not configured yet.') . ' ';
+
+  if ($::auth->check_right($::form->{login}, 'config')) { # TODO wut?
+    $msg .= t8('You can create warehouses and bins via the menu "System -> Warehouses".');
+  } else {
+    $msg .= t8('Please ask your administrator to create warehouses and bins.');
+  }
+  $::form->show_generic_error($msg);
+}
+
+1;