Fibu Schnellsuche - Datum mit to_kivitendo und oneline_summary
[kivitendo-erp.git] / SL / Controller / BankTransaction.pm
index a41957d..752dba0 100644 (file)
@@ -23,13 +23,16 @@ use SL::DB::AccTransaction;
 use SL::DB::Tax;
 use SL::DB::Draft;
 use SL::DB::BankAccount;
+use SL::DB::SepaExportItem;
+use SL::DBUtils qw(like);
 use SL::Presenter;
-use SL::DB::Helper::Payment qw(validate_payment_type);
+
+use List::MoreUtils qw(any);
 use List::Util qw(max);
 
 use Rose::Object::MakeMethods::Generic
 (
'scalar --get_set_init' => [ qw(models) ],
 'scalar --get_set_init' => [ qw(models problems) ],
 );
 
 __PACKAGE__->run_before('check_auth');
@@ -79,33 +82,119 @@ sub action_list {
   push @where, (transdate => { lt => $todate })   if ($todate);
   my $bank_account = SL::DB::Manager::BankAccount->find_by( id => $::form->{filter}{bank_account} );
   # bank_transactions no younger than starting date,
+  # including starting date (same search behaviour as fromdate)
   # but OPEN invoices to be matched may be from before
   if ( $bank_account->reconciliation_starting_date ) {
-    push @where, (transdate => { gt => $bank_account->reconciliation_starting_date });
+    push @where, (transdate => { ge => $bank_account->reconciliation_starting_date });
   };
 
-  my $bank_transactions = SL::DB::Manager::BankTransaction->get_all(where => [ amount => {ne => \'invoice_amount'},
-                                                                               local_bank_account_id => $::form->{filter}{bank_account},
-                                                                               @where ],
-                                                                    with_objects => [ 'local_bank_account', 'currency' ],
-                                                                    sort_by => $sort_by, limit => 10000);
+  my $bank_transactions = SL::DB::Manager::BankTransaction->get_all(
+    with_objects => [ 'local_bank_account', 'currency' ],
+    sort_by      => $sort_by,
+    limit        => 10000,
+    where        => [
+      amount                => {ne => \'invoice_amount'},
+      local_bank_account_id => $::form->{filter}{bank_account},
+      @where
+    ],
+  );
+  $main::lxdebug->message(LXDebug->DEBUG2(),"count bt=".scalar(@{$bank_transactions}." bank_account=".$bank_account->id." chart=".$bank_account->chart_id));
 
-  my $all_open_ar_invoices = SL::DB::Manager::Invoice->get_all(where => [amount => { gt => \'paid' }], with_objects => 'customer');
-  my $all_open_ap_invoices = SL::DB::Manager::PurchaseInvoice->get_all(where => [amount => { gt => \'paid' }], with_objects => 'vendor');
+  my $all_open_ar_invoices = SL::DB::Manager::Invoice        ->get_all(where => [amount => { gt => \'paid' }], with_objects => ['customer','payment_terms']);
+  my $all_open_ap_invoices = SL::DB::Manager::PurchaseInvoice->get_all(where => [amount => { gt => \'paid' }], with_objects => ['vendor'  ,'payment_terms']);
+  my $all_open_sepa_export_items = SL::DB::Manager::SepaExportItem->get_all(where => [chart_id => $bank_account->chart_id ,
+                                                                             'sepa_export.executed' => 0, 'sepa_export.closed' => 0 ], with_objects => ['sepa_export']);
+  $main::lxdebug->message(LXDebug->DEBUG2(),"count sepaexport=".scalar(@{$all_open_sepa_export_items}));
 
   my @all_open_invoices;
   # filter out invoices with less than 1 cent outstanding
-  push @all_open_invoices, grep { abs($_->amount - $_->paid) >= 0.01 } @{ $all_open_ar_invoices };
-  push @all_open_invoices, grep { abs($_->amount - $_->paid) >= 0.01 } @{ $all_open_ap_invoices };
+  push @all_open_invoices, map { $_->{is_ar}=1 ; $_ } grep { abs($_->amount - $_->paid) >= 0.01 } @{ $all_open_ar_invoices };
+  push @all_open_invoices, map { $_->{is_ar}=0 ; $_ } grep { abs($_->amount - $_->paid) >= 0.01 } @{ $all_open_ap_invoices };
+  $main::lxdebug->message(LXDebug->DEBUG2(),"bank_account=".$::form->{filter}{bank_account}." invoices: ".scalar(@{ $all_open_ar_invoices }).
+                              " + ".scalar(@{ $all_open_ap_invoices })." transactions=".scalar(@{ $bank_transactions }));
+
+  my @all_sepa_invoices;
+  my @all_non_sepa_invoices;
+  my %sepa_exports;
+  # first collect sepa export items to open invoices
+  foreach my $open_invoice (@all_open_invoices){
+    #    my @items =  grep { $_->ap_id == $open_invoice->id ||  $_->ar_id == $open_invoice->id } @{$all_open_sepa_export_items};
+    $open_invoice->{realamount}  = $::form->format_amount(\%::myconfig,$open_invoice->amount,2);
+    $open_invoice->{skonto_type} = 'without_skonto';
+    foreach ( @{$all_open_sepa_export_items}) {
+      if ( $_->ap_id == $open_invoice->id ||  $_->ar_id == $open_invoice->id ) {
+        my $factor = ( $_->ar_id == $open_invoice->id>0?1:-1);
+        $main::lxdebug->message(LXDebug->DEBUG2(),"exitem=".$_->id." for invoice ".$open_invoice->id." factor=".$factor);
+        $open_invoice->{realamount}  = $::form->format_amount(\%::myconfig,$open_invoice->amount*$factor,2);
+        $open_invoice->{sepa_export_item} = $_ ;
+        $open_invoice->{skonto_type} = $_->payment_type;
+        $sepa_exports{$_->sepa_export_id} ||= { count => 0, is_ar => 0, amount => 0, proposed => 0, invoices => [], item => $_ };
+        $sepa_exports{$_->sepa_export_id}->{count}++ ;
+        $sepa_exports{$_->sepa_export_id}->{is_ar}++ if  $_->ar_id == $open_invoice->id;
+        $sepa_exports{$_->sepa_export_id}->{amount} += $_->amount * $factor;
+        push @{ $sepa_exports{$_->sepa_export_id}->{invoices} }, $open_invoice;
+        #$main::lxdebug->message(LXDebug->DEBUG2(),"amount for export id ".$_->sepa_export_id." = ".
+        #                          $sepa_exports{$_->sepa_export_id}->{amount}." count = ".
+        #                          $sepa_exports{$_->sepa_export_id}->{count}." is_ar = ".
+        #                          $sepa_exports{$_->sepa_export_id}->{is_ar} );
+        push @all_sepa_invoices , $open_invoice;
+      }
+    }
+    push @all_non_sepa_invoices , $open_invoice if ! $open_invoice->{sepa_export_item};
+  }
 
   # try to match each bank_transaction with each of the possible open invoices
   # by awarding points
+  my @proposals;
 
   foreach my $bt (@{ $bank_transactions }) {
-    next unless $bt->{remote_name};  # bank has no name, usually fees, use create invoice to assign
+    ## 5 Stellen hinter dem Komma auf 2 Stellen reduzieren
+    $bt->amount($bt->amount*1);
+    $bt->invoice_amount($bt->invoice_amount*1);
+    $main::lxdebug->message(LXDebug->DEBUG2(),"BT ".$bt->id." amount=".$bt->amount." invoice_amount=".$bt->invoice_amount." remote=". $bt->{remote_name});
+
+    $bt->{proposals}    = [];
+    $bt->{rule_matches} = [];
 
     $bt->{remote_name} .= $bt->{remote_name_1} if $bt->{remote_name_1};
 
+    if ( $self->is_collective_transaction($bt) ) {
+      foreach ( keys  %sepa_exports) {
+        #$main::lxdebug->message(LXDebug->DEBUG2(),"Exp ID=".$_." compare sum amount ".($sepa_exports{$_}->{amount} *1) ." == ".($bt->amount * 1));
+        if ( $bt->transaction_code eq '191' && abs(($sepa_exports{$_}->{amount} * 1) - ($bt->amount * 1)) < 0.01 ) {
+          ## jupp
+          @{$bt->{proposals}} = @{$sepa_exports{$_}->{invoices}};
+          $bt->{agreement}    = 20;
+          push(@{$bt->{rule_matches}},'sepa_export_item(20)');
+          $sepa_exports{$_}->{proposed}=1;
+          #$main::lxdebug->message(LXDebug->DEBUG2(),"has ".scalar($bt->{proposals})." invoices");
+          push(@proposals, $bt);
+          next;
+        }
+      }
+    }
+    next unless $bt->{remote_name};  # bank has no name, usually fees, use create invoice to assign
+
+    foreach ( @{$all_open_sepa_export_items}) {
+      last if scalar (@all_sepa_invoices) == 0;
+      foreach my $open_invoice (@all_sepa_invoices){
+        if ( $_->ap_id == $open_invoice->id ||  $_->ar_id == $open_invoice->id ) {
+          #$main::lxdebug->message(LXDebug->DEBUG2(),"exitem2=".$_->id." for invoice ".$open_invoice->id);
+          my $factor = ( $_->ar_id == $open_invoice->id?1:-1);
+          $_->amount($_->amount*1);
+          #$main::lxdebug->message(LXDebug->DEBUG2(),"remote account '".$bt->{remote_account_number}."' bt_amount=". ($bt->amount * $factor));
+          #$main::lxdebug->message(LXDebug->DEBUG2(),"compare with   '".$_->vc_iban."'    amount=".$_->amount);
+          if ( $bt->{remote_account_number} eq $_->vc_iban && abs(( $_->amount *1 ) - ($bt->amount * $factor)) < 0.01 ) {
+            ($open_invoice->{agreement}, $open_invoice->{rule_matches}) = $bt->get_agreement_with_invoice($open_invoice);
+            $open_invoice->{agreement} += 5;
+            $open_invoice->{rule_matches} .= 'sepa_export_item(5) ';
+            $main::lxdebug->message(LXDebug->DEBUG2(),"sepa invoice_id=".$open_invoice->id." agreement=".$open_invoice->{agreement}." rules matches=".$open_invoice->{rule_matches});
+            $open_invoice->{realamount} = $::form->format_amount(\%::myconfig,$open_invoice->amount*$factor,2);
+          }
+        }
+      }
+    }
+
     # try to match the current $bt to each of the open_invoices, saving the
     # results of get_agreement_with_invoice in $open_invoice->{agreement} and
     # $open_invoice->{rule_matches}.
@@ -115,12 +204,12 @@ sub action_list {
     # the arrays $bt->{proposals} and $bt->{rule_matches}, and the agreement
     # score is stored in $bt->{agreement}
 
-    foreach my $open_invoice (@all_open_invoices){
+    foreach my $open_invoice (@all_non_sepa_invoices){
       ($open_invoice->{agreement}, $open_invoice->{rule_matches}) = $bt->get_agreement_with_invoice($open_invoice);
+      $open_invoice->{realamount} = $::form->format_amount(\%::myconfig,$open_invoice->amount*($open_invoice->{is_ar}?1:-1),2);
+      $main::lxdebug->message(LXDebug->DEBUG2(),"nons invoice_id=".$open_invoice->id." agreement=".$open_invoice->{agreement}." rules matches=".$open_invoice->{rule_matches});
     };
 
-    $bt->{proposals} = [];
-
     my $agreement = 15;
     my $min_agreement = 3; # suggestions must have at least this score
 
@@ -145,9 +234,14 @@ sub action_list {
   # * there must be only one exact match
   # * depending on whether sales or purchase the amount has to have the correct sign (so Gutschriften don't work?)
   my $proposal_threshold = 5;
-  my @proposals = grep { $_->{agreement} >= $proposal_threshold
-                         and 1 == scalar @{ $_->{proposals} }
-                         and (@{ $_->{proposals} }[0]->is_sales ? abs(@{ $_->{proposals} }[0]->amount - $_->amount) < 0.01  : abs(@{ $_->{proposals} }[0]->amount + $_->amount) < 0.01) } @{ $bank_transactions };
+  my @otherproposals = grep {
+       ($_->{agreement} >= $proposal_threshold)
+    && (1 == scalar @{ $_->{proposals} })
+    && (@{ $_->{proposals} }[0]->is_sales ? abs(@{ $_->{proposals} }[0]->amount - $_->amount) < 0.01
+                                          : abs(@{ $_->{proposals} }[0]->amount + $_->amount) < 0.01)
+  } @{ $bank_transactions };
+
+  push ( @proposals, @otherproposals);
 
   # sort bank transaction proposals by quality (score) of proposal
   $bank_transactions = [ sort { $a->{agreement} <=> $b->{agreement} } @{ $bank_transactions } ] if $::form->{sort_by} eq 'proposal' and $::form->{sort_dir} == 1;
@@ -158,7 +252,9 @@ sub action_list {
                 title             => t8('Bank transactions MT940'),
                 BANK_TRANSACTIONS => $bank_transactions,
                 PROPOSALS         => \@proposals,
-                bank_account      => $bank_account );
+                bank_account      => $bank_account,
+                ui_tab            => scalar(@proposals) > 0?1:0,
+              );
 }
 
 sub action_assign_invoice {
@@ -166,8 +262,9 @@ sub action_assign_invoice {
 
   $self->{transaction} = SL::DB::Manager::BankTransaction->find_by(id => $::form->{bt_id});
 
-  $self->render('bank_transactions/assign_invoice', { layout  => 0 },
-                title      => t8('Assign invoice'),);
+  $self->render('bank_transactions/assign_invoice',
+                { layout => 0 },
+                title => t8('Assign invoice'),);
 }
 
 sub action_create_invoice {
@@ -177,6 +274,8 @@ sub action_create_invoice {
   $self->{transaction} = SL::DB::Manager::BankTransaction->find_by(id => $::form->{bt_id});
   my $vendor_of_transaction = SL::DB::Manager::Vendor->find_by(account_number => $self->{transaction}->{remote_account_number});
 
+  my $use_vendor_filter = $self->{transaction}->{remote_account_number} && $vendor_of_transaction;
+
   my $drafts = SL::DB::Manager::Draft->get_all(where => [ module => 'ap'] , with_objects => 'employee');
 
   my @filtered_drafts;
@@ -190,22 +289,24 @@ sub action_create_invoice {
   }
 
   #Filter drafts
-  @filtered_drafts = grep { $_->{vendor_id} == $vendor_of_transaction->id } @filtered_drafts if $vendor_of_transaction;
+  @filtered_drafts = grep { $_->{vendor_id} == $vendor_of_transaction->id } @filtered_drafts if $use_vendor_filter;
 
   my $all_vendors = SL::DB::Manager::Vendor->get_all();
-
-  $self->render('bank_transactions/create_invoice', { layout  => 0 },
-      title      => t8('Create invoice'),
-      DRAFTS     => \@filtered_drafts,
-      vendor_id  => $vendor_of_transaction ? $vendor_of_transaction->id : undef,
-      vendor_name => $vendor_of_transaction ? $vendor_of_transaction->name : undef,
-      ALL_VENDORS => $all_vendors,
-      limit      => $myconfig{vclimit},
-      callback   => $self->url_for(action                => 'list',
+  my $callback    = $self->url_for(action                => 'list',
                                    'filter.bank_account' => $::form->{filter}->{bank_account},
                                    'filter.todate'       => $::form->{filter}->{todate},
-                                   'filter.fromdate'     => $::form->{filter}->{fromdate}),
-      );
+                                   'filter.fromdate'     => $::form->{filter}->{fromdate});
+
+  $self->render(
+    'bank_transactions/create_invoice',
+    { layout => 0 },
+    title       => t8('Create invoice'),
+    DRAFTS      => \@filtered_drafts,
+    vendor_id   => $use_vendor_filter ? $vendor_of_transaction->id   : undef,
+    vendor_name => $use_vendor_filter ? $vendor_of_transaction->name : undef,
+    ALL_VENDORS => $all_vendors,
+    callback    => $callback,
+  );
 }
 
 sub action_ajax_payment_suggestion {
@@ -215,9 +316,8 @@ sub action_ajax_payment_suggestion {
   # create an HTML blob to be used by the js function add_invoices in templates/webpages/bank_transactions/list.html
   # and return encoded as JSON
 
-  my $bt = SL::DB::Manager::BankTransaction->find_by( id => $::form->{bt_id} );
-  my $invoice = SL::DB::Manager::Invoice->find_by( id => $::form->{prop_id} );
-  $invoice = SL::DB::Manager::PurchaseInvoice->find_by( id => $::form->{prop_id} ) unless $invoice;
+  my $bt      = SL::DB::Manager::BankTransaction->find_by( id => $::form->{bt_id} );
+  my $invoice = SL::DB::Manager::Invoice->find_by( id => $::form->{prop_id} ) || SL::DB::Manager::PurchaseInvoice->find_by( id => $::form->{prop_id} );
 
   die unless $bt and $invoice;
 
@@ -225,10 +325,13 @@ sub action_ajax_payment_suggestion {
 
   my $html;
   $html .= SL::Presenter->input_tag('invoice_ids.' . $::form->{bt_id} . '[]', $::form->{prop_id} , type => 'hidden');
-  $html .= SL::Presenter->escape( $invoice->invnumber );
-  $html .= SL::Presenter->select_tag('invoice_skontos.' . $::form->{bt_id} . '[]', \@select_options,
-                                              value_key => 'payment_type',
-                                              title_key => 'display' ) if @select_options;
+  $html .= SL::Presenter->escape(t8('Invno.')      . ': ' . $invoice->invnumber . ' ');
+  $html .= SL::Presenter->escape(t8('Open amount') . ': ' . $::form->format_amount(\%::myconfig, $invoice->open_amount, 2) . ' ');
+  $html .= SL::Presenter->select_tag('invoice_skontos.' . $::form->{bt_id} . '[]',
+                                     \@select_options,
+                                     value_key => 'payment_type',
+                                     title_key => 'display' )
+    if @select_options;
   $html .= '<a href=# onclick="delete_invoice(' . $::form->{bt_id} . ',' . $::form->{prop_id} . ');">x</a>';
   $html = SL::Presenter->html_tag('div', $html, id => $::form->{bt_id} . '.' . $::form->{prop_id});
 
@@ -238,33 +341,36 @@ sub action_ajax_payment_suggestion {
 sub action_filter_drafts {
   my ($self) = @_;
 
-  $self->{transaction} = SL::DB::Manager::BankTransaction->find_by(id => $::form->{bt_id});
+  $self->{transaction}      = SL::DB::Manager::BankTransaction->find_by(id => $::form->{bt_id});
   my $vendor_of_transaction = SL::DB::Manager::Vendor->find_by(account_number => $self->{transaction}->{remote_account_number});
 
-  my $drafts = SL::DB::Manager::Draft->get_all(with_objects => 'employee');
+  my $drafts                = SL::DB::Manager::Draft->get_all(with_objects => 'employee');
 
   my @filtered_drafts;
 
   foreach my $draft ( @{ $drafts } ) {
     my $draft_as_object = YAML::Load($draft->form);
-    my $vendor = SL::DB::Manager::Vendor->find_by(id => $draft_as_object->{vendor_id});
-    $draft->{vendor} = $vendor->name;
+    next unless $draft_as_object->{vendor_id};  # we cannot filter for vendor name, if this is a gl draft
+
+    my $vendor          = SL::DB::Manager::Vendor->find_by(id => $draft_as_object->{vendor_id});
+    $draft->{vendor}    = $vendor->name;
     $draft->{vendor_id} = $vendor->id;
+
     push @filtered_drafts, $draft;
   }
 
   my $vendor_name = $::form->{vendor};
-  my $vendor_id = $::form->{vendor_id};
+  my $vendor_id   = $::form->{vendor_id};
 
   #Filter drafts
-  @filtered_drafts = grep { $_->{vendor_id} == $vendor_id } @filtered_drafts if $vendor_id;
-  @filtered_drafts = grep { $_->{vendor} =~ /$vendor_name/i } @filtered_drafts if $vendor_name;
+  @filtered_drafts = grep { $_->{vendor_id} == $vendor_id      } @filtered_drafts if $vendor_id;
+  @filtered_drafts = grep { $_->{vendor}    =~ /$vendor_name/i } @filtered_drafts if $vendor_name;
 
   my $output  = $self->render(
-      'bank_transactions/filter_drafts',
-      { output      => 0 },
-      DRAFTS => \@filtered_drafts,
-      );
+    'bank_transactions/filter_drafts',
+    { output => 0 },
+    DRAFTS => \@filtered_drafts,
+  );
 
   my %result = ( count => 0, html => $output );
 
@@ -278,8 +384,8 @@ sub action_ajax_add_list {
   my @where_purchase = (amount => { ne => \'paid' });
 
   if ($::form->{invnumber}) {
-    push @where_sale,     (invnumber => { ilike => '%' . $::form->{invnumber} . '%'});
-    push @where_purchase, (invnumber => { ilike => '%' . $::form->{invnumber} . '%'});
+    push @where_sale,     (invnumber => { ilike => like($::form->{invnumber})});
+    push @where_purchase, (invnumber => { ilike => like($::form->{invnumber})});
   }
 
   if ($::form->{amount}) {
@@ -288,13 +394,13 @@ sub action_ajax_add_list {
   }
 
   if ($::form->{vcnumber}) {
-    push @where_sale,     ('customer.customernumber' => { ilike => '%' . $::form->{vcnumber} . '%'});
-    push @where_purchase, ('vendor.vendornumber'     => { ilike => '%' . $::form->{vcnumber} . '%'});
+    push @where_sale,     ('customer.customernumber' => { ilike => like($::form->{vcnumber})});
+    push @where_purchase, ('vendor.vendornumber'     => { ilike => like($::form->{vcnumber})});
   }
 
   if ($::form->{vcname}) {
-    push @where_sale,     ('customer.name' => { ilike => '%' . $::form->{vcname} . '%'});
-    push @where_purchase, ('vendor.name'   => { ilike => '%' . $::form->{vcname} . '%'});
+    push @where_sale,     ('customer.name' => { ilike => like($::form->{vcname})});
+    push @where_purchase, ('vendor.name'   => { ilike => like($::form->{vcname})});
   }
 
   if ($::form->{transdatefrom}) {
@@ -314,20 +420,20 @@ sub action_ajax_add_list {
     };
   }
 
-  my $all_open_ar_invoices = SL::DB::Manager::Invoice->get_all(where => \@where_sale, with_objects => 'customer');
+  my $all_open_ar_invoices = SL::DB::Manager::Invoice        ->get_all(where => \@where_sale,     with_objects => 'customer');
   my $all_open_ap_invoices = SL::DB::Manager::PurchaseInvoice->get_all(where => \@where_purchase, with_objects => 'vendor');
 
-  my @all_open_invoices;
-  # filter out subcent differences from ap invoices
+  my @all_open_invoices = @{ $all_open_ar_invoices };
+  # add ap invoices, filtering out subcent open amounts
   push @all_open_invoices, grep { abs($_->amount - $_->paid) >= 0.01 } @{ $all_open_ap_invoices };
 
   @all_open_invoices = sort { $a->id <=> $b->id } @all_open_invoices;
 
   my $output  = $self->render(
-      'bank_transactions/add_list',
-      { output      => 0 },
-      INVOICES => \@all_open_invoices,
-      );
+    'bank_transactions/add_list',
+    { output => 0 },
+    INVOICES => \@all_open_invoices,
+  );
 
   my %result = ( count => 0, html => $output );
 
@@ -339,131 +445,277 @@ sub action_ajax_accept_invoices {
 
   my @selected_invoices;
   foreach my $invoice_id (@{ $::form->{invoice_id} || [] }) {
-    my $invoice_object = SL::DB::Manager::Invoice->find_by(id => $invoice_id);
-    $invoice_object ||= SL::DB::Manager::PurchaseInvoice->find_by(id => $invoice_id);
-
+    my $invoice_object = SL::DB::Manager::Invoice->find_by(id => $invoice_id) || SL::DB::Manager::PurchaseInvoice->find_by(id => $invoice_id);
     push @selected_invoices, $invoice_object;
   }
 
-  $self->render('bank_transactions/invoices', { layout => 0 },
-                INVOICES => \@selected_invoices,
-                bt_id    => $::form->{bt_id} );
+  $self->render(
+    'bank_transactions/invoices',
+    { layout => 0 },
+    INVOICES => \@selected_invoices,
+    bt_id    => $::form->{bt_id},
+  );
+}
+
+sub save_invoices {
+  my ($self) = @_;
+
+  return 0 if !$::form->{invoice_ids};
+
+  my %invoice_hash = %{ delete $::form->{invoice_ids} };  # each key (the bt line with a bt_id) contains an array of invoice_ids
+
+  # e.g. three partial payments with bt_ids 54, 55 and 56 for invoice with id 74:
+  # $invoice_hash = {
+  #         '55' => [
+  #                 '74'
+  #               ],
+  #         '54' => [
+  #                 '74'
+  #               ],
+  #         '56' => [
+  #                 '74'
+  #               ]
+  #       };
+  #
+  # or if the payment with bt_id 44 is used to pay invoices with ids 50, 51 and 52
+  # $invoice_hash = {
+  #           '44' => [ '50', '51', 52' ]
+  #         };
+
+  $::form->{invoice_skontos} ||= {}; # hash of arrays containing the payment types, could be empty
+
+  # a bank_transaction may be assigned to several invoices, i.e. a customer
+  # might pay several open invoices with one transaction
+
+  $self->problems([]);
+
+  my $count = 0;
+
+  if ( $::form->{proposal_ids} ) {
+    foreach (@{ $::form->{proposal_ids} }) {
+      my  $bank_transaction_id = $_;
+      my  $invoice_ids = $invoice_hash{$_};
+      push @{ $self->problems }, $self->save_single_bank_transaction(
+        bank_transaction_id => $bank_transaction_id,
+        invoice_ids         => $invoice_ids,
+      );
+      $count += scalar( @{$invoice_ids} );
+    }
+  } else {
+    while ( my ($bank_transaction_id, $invoice_ids) = each(%invoice_hash) ) {
+      push @{ $self->problems }, $self->save_single_bank_transaction(
+        bank_transaction_id => $bank_transaction_id,
+        invoice_ids         => $invoice_ids,
+      );
+      $count += scalar( @{$invoice_ids} );
+    }
+  }
+  return $count;
 }
 
 sub action_save_invoices {
   my ($self) = @_;
+  my $count = $self->save_invoices();
+
+  flash('ok', t8('#1 invoice(s) saved.', $count));
+
+  $self->action_list();
+}
+
+sub action_save_proposals {
+  my ($self) = @_;
+  if ( $::form->{proposal_ids} ) {
+    my $propcount = scalar(@{ $::form->{proposal_ids} });
+    if ( $propcount > 0 ) {
+      my $count = $self->save_invoices();
+
+      flash('ok', t8('#1 proposal(s) with #2 invoice(s) saved.',  $propcount, $count));
+    }
+  }
+  $self->action_list();
+
+}
+
+sub is_collective_transaction {
+  my ($self, $bt) = @_;
+  return $bt->transaction_code eq "191";
+}
+
+sub save_single_bank_transaction {
+  my ($self, %params) = @_;
+
+  my %data = (
+    %params,
+    bank_transaction => SL::DB::Manager::BankTransaction->find_by(id => $params{bank_transaction_id}),
+    invoices         => [],
+  );
 
-  my $invoice_hash = delete $::form->{invoice_ids}; # each key (the bt line with a bt_id) contains an array of invoice_ids
-  my $skonto_hash  = delete $::form->{invoice_skontos} || {}; # array containing the payment type, could be empty
+  if (!$data{bank_transaction}) {
+    return {
+      %data,
+      result => 'error',
+      message => $::locale->text('The ID #1 is not a valid database ID.', $data{bank_transaction_id}),
+    };
+  }
+
+  my (@warnings);
 
-  while ( my ($bt_id, $invoice_ids) = each(%$invoice_hash) ) {
-    my $bank_transaction = SL::DB::Manager::BankTransaction->find_by(id => $bt_id);
-    my $sign = $bank_transaction->amount < 0 ? -1 : 1;
+  my $worker = sub {
+    my $bt_id                 = $data{bank_transaction_id};
+    my $bank_transaction      = $data{bank_transaction};
+    my $sign                  = $bank_transaction->amount < 0 ? -1 : 1;
     my $amount_of_transaction = $sign * $bank_transaction->amount;
+    my $payment_received      = $bank_transaction->amount > 0;
+    my $payment_sent          = $bank_transaction->amount < 0;
+
+    foreach my $invoice_id (@{ $params{invoice_ids} }) {
+      my $invoice = SL::DB::Manager::Invoice->find_by(id => $invoice_id) || SL::DB::Manager::PurchaseInvoice->find_by(id => $invoice_id);
+      if (!$invoice) {
+        return {
+          %data,
+          result  => 'error',
+          message => $::locale->text("The ID #1 is not a valid database ID.", $invoice_id),
+        };
+      }
+
+      push @{ $data{invoices} }, $invoice;
+    }
+
+    if (   $payment_received
+        && any {    ( $_->is_sales && ($_->amount < 0))
+                 || (!$_->is_sales && ($_->amount > 0))
+               } @{ $data{invoices} }) {
+      return {
+        %data,
+        result  => 'error',
+        message => $::locale->text("Received payments can only be posted for sales invoices and purchase credit notes."),
+      };
+    }
 
-    my @invoices;
-    foreach my $invoice_id (@{ $invoice_ids }) {
-      push @invoices, (SL::DB::Manager::Invoice->find_by(id => $invoice_id) || SL::DB::Manager::PurchaseInvoice->find_by(id => $invoice_id));
+    if (   $payment_sent
+        && any {    ( $_->is_sales && ($_->amount > 0))
+                 || (!$_->is_sales && ($_->amount < 0))
+               } @{ $data{invoices} }) {
+      return {
+        %data,
+        result  => 'error',
+        message => $::locale->text("Sent payments can only be posted for purchase invoices and sales credit notes."),
+      };
     }
-    @invoices = sort { return 1 if ($a->is_sales and $a->amount > 0);
-                          return 1 if (!$a->is_sales and $a->amount < 0);
-                          return -1; } @invoices                if $bank_transaction->amount > 0;
-    @invoices = sort { return -1 if ($a->is_sales and $a->amount > 0);
-                       return -1 if (!$a->is_sales and $a->amount < 0);
-                       return 1; } @invoices                    if $bank_transaction->amount < 0;
-
-    foreach my $invoice (@invoices) {
+
+    my $max_invoices = scalar(@{ $data{invoices} });
+    my $n_invoices   = 0;
+
+    foreach my $invoice (@{ $data{invoices} }) {
+
+      $n_invoices++ ;
+
+      # Check if bank_transaction already has a link to the invoice, may only be linked once per invoice
+      # This might be caused by the user reloading a page and resending the form
+      if (_existing_record_link($bank_transaction, $invoice)) {
+        return {
+          %data,
+          result  => 'error',
+          message => $::locale->text("Bank transaction with id #1 has already been linked to #2.", $bank_transaction->id, $invoice->displayable_name),
+        };
+      }
+
+      if (!$amount_of_transaction && $invoice->open_amount) {
+        return {
+          %data,
+          result  => 'error',
+          message => $::locale->text("A payment can only be posted for multiple invoices if the amount to post is equal to or bigger than the sum of the open amounts of the affected invoices."),
+        };
+      }
+
       my $payment_type;
-      if ( defined $skonto_hash->{"$bt_id"} ) {
-        $payment_type = shift(@{ $skonto_hash->{"$bt_id"} });
-        SL::DB::Helper::Payment->validate_payment_type($payment_type);
+      if ( defined $::form->{invoice_skontos}->{"$bt_id"} ) {
+        $payment_type = shift(@{ $::form->{invoice_skontos}->{"$bt_id"} });
       } else {
         $payment_type = 'without_skonto';
       };
-      if ($amount_of_transaction == 0) {
-        flash('warning',  $::locale->text('There are invoices which could not be paid by bank transaction #1 (Account number: #2, bank code: #3)!',
-                                            $bank_transaction->purpose,
-                                            $bank_transaction->remote_account_number,
-                                            $bank_transaction->remote_bank_code));
-        last;
-      }
-      #pay invoice or go to the next bank transaction if the amount is not sufficiently high
-      if ($invoice->amount <= $amount_of_transaction) {
+
+      # pay invoice or go to the next bank transaction if the amount is not sufficiently high
+      if ($invoice->open_amount <= $amount_of_transaction && $n_invoices < $max_invoices) {
+        my $open_amount = ($payment_type eq 'with_skonto_pt'?$invoice->amount_less_skonto:$invoice->open_amount);
+        # first calculate new bank transaction amount ...
+        if ($invoice->is_sales) {
+          $amount_of_transaction -= $sign * $open_amount;
+          $bank_transaction->invoice_amount($bank_transaction->invoice_amount + $open_amount);
+        } else {
+          $amount_of_transaction += $sign * $open_amount;
+          $bank_transaction->invoice_amount($bank_transaction->invoice_amount - $open_amount);
+        }
+        # ... and then pay the invoice
         $invoice->pay_invoice(chart_id     => $bank_transaction->local_bank_account->chart_id,
                               trans_id     => $invoice->id,
-                              amount       => $invoice->amount,
+                              amount       => $open_amount,
                               payment_type => $payment_type,
                               transdate    => $bank_transaction->transdate->to_kivitendo);
-        if ($invoice->is_sales) {
-          $amount_of_transaction -= $sign * $invoice->amount;
-          $bank_transaction->invoice_amount($bank_transaction->invoice_amount + $invoice->amount);
-        } else {
-          $amount_of_transaction += $sign * $invoice->amount if (!$invoice->is_sales);
-          $bank_transaction->invoice_amount($bank_transaction->invoice_amount - $invoice->amount);
-        }
-      } else {
+      } else { # use the whole amount of the bank transaction for the invoice, overpay the invoice if necessary
+        my $overpaid_amount = $amount_of_transaction - $invoice->open_amount;
         $invoice->pay_invoice(chart_id     => $bank_transaction->local_bank_account->chart_id,
                               trans_id     => $invoice->id,
                               amount       => $amount_of_transaction,
                               payment_type => $payment_type,
                               transdate    => $bank_transaction->transdate->to_kivitendo);
-        $bank_transaction->invoice_amount($bank_transaction->amount) if $invoice->is_sales;
-        $bank_transaction->invoice_amount($bank_transaction->amount) if !$invoice->is_sales;
+        $bank_transaction->invoice_amount($bank_transaction->amount);
         $amount_of_transaction = 0;
-      }
 
-      #Record a link from the bank transaction to the invoice
+        if ($overpaid_amount >= 0.01) {
+          push @warnings, {
+            %data,
+            result  => 'warning',
+            message => $::locale->text('Invoice #1 was overpaid by #2.', $invoice->invnumber, $::form->format_amount(\%::myconfig, $overpaid_amount, 2)),
+          };
+        }
+      }
+      # Record a record link from the bank transaction to the invoice
       my @props = (
-          from_table => 'bank_transactions',
-          from_id    => $bt_id,
-          to_table   => $invoice->is_sales ? 'ar' : 'ap',
-          to_id      => $invoice->id,
-          );
+        from_table => 'bank_transactions',
+        from_id    => $bt_id,
+        to_table   => $invoice->is_sales ? 'ar' : 'ap',
+        to_id      => $invoice->id,
+      );
+
+      SL::DB::RecordLink->new(@props)->save;
 
-      my $existing = SL::DB::Manager::RecordLink->get_all(where => \@props, limit => 1)->[0];
+      # "close" a sepa_export_item if it exists
+      # code duplicated in action_save_proposals!
+      # currently only works, if there is only exactly one open sepa_export_item
+      if ( my $seis = $invoice->find_sepa_export_items({ executed => 0 }) ) {
+        if ( scalar @$seis == 1 ) {
+          # moved the execution and the check for sepa_export into a method,
+          # this isn't part of a transaction, though
+          $seis->[0]->set_executed if $invoice->id == $seis->[0]->arap_id;
+        }
+      }
 
-      SL::DB::RecordLink->new(@props)->save if !$existing;
     }
     $bank_transaction->save;
-  }
-
-  $self->action_list();
-}
-
-sub action_save_proposals {
-  my ($self) = @_;
-
-  foreach my $bt_id (@{ $::form->{proposal_ids} }) {
-    #mark bt as booked
-    my $bt = SL::DB::Manager::BankTransaction->find_by(id => $bt_id);
-    $bt->invoice_amount($bt->amount);
-    $bt->save;
-
-    #pay invoice
-    my $arap = SL::DB::Manager::Invoice->find_by(id => $::form->{"proposed_invoice_$bt_id"});
-    $arap    = SL::DB::Manager::PurchaseInvoice->find_by(id => $::form->{"proposed_invoice_$bt_id"}) if not defined $arap;
-    $arap->pay_invoice(chart_id  => $bt->local_bank_account->chart_id,
-                       trans_id  => $arap->id,
-                       amount    => $arap->amount,
-                       transdate => $bt->transdate->to_kivitendo);
-    $arap->save;
-
-    #create record link
-    my @props = (
-        from_table => 'bank_transactions',
-        from_id    => $bt_id,
-        to_table   => $arap->is_sales ? 'ar' : 'ap',
-        to_id      => $arap->id,
-        );
 
-    my $existing = SL::DB::Manager::RecordLink->get_all(where => \@props, limit => 1)->[0];
+    # 'undef' means 'no error' here.
+    return undef;
+  };
 
-    SL::DB::RecordLink->new(@props)->save if !$existing;
-  }
+  my $error;
+  my $rez = $data{bank_transaction}->db->with_transaction(sub {
+    eval {
+      $error = $worker->();
+      1;
+
+    } or do {
+      $error = {
+        %data,
+        result  => 'error',
+        message => $@,
+      };
+    };
 
-  flash('ok', t8('#1 proposal(s) saved.', scalar @{ $::form->{proposal_ids} }));
+    die if $error;
+  });
 
-  $self->action_list();
+  return grep { $_ } ($error, @warnings);
 }
 
 #
@@ -485,12 +737,12 @@ sub make_filter_summary {
   my @filter_strings;
 
   my @filters = (
-    [ $filter->{"transdate:date::ge"},  $::locale->text('Transdate')  . " " . $::locale->text('From Date') ],
-    [ $filter->{"transdate:date::le"},  $::locale->text('Transdate')  . " " . $::locale->text('To Date')   ],
-    [ $filter->{"valutadate:date::ge"}, $::locale->text('Valutadate') . " " . $::locale->text('From Date') ],
-    [ $filter->{"valutadate:date::le"}, $::locale->text('Valutadate') . " " . $::locale->text('To Date')   ],
-    [ $filter->{"amount:number"},       $::locale->text('Amount')                                          ],
-    [ $filter->{"bank_account_id:integer"}, $::locale->text('Local bank account')                          ],
+    [ $filter->{"transdate:date::ge"},      $::locale->text('Transdate')  . " " . $::locale->text('From Date') ],
+    [ $filter->{"transdate:date::le"},      $::locale->text('Transdate')  . " " . $::locale->text('To Date')   ],
+    [ $filter->{"valutadate:date::ge"},     $::locale->text('Valutadate') . " " . $::locale->text('From Date') ],
+    [ $filter->{"valutadate:date::le"},     $::locale->text('Valutadate') . " " . $::locale->text('To Date')   ],
+    [ $filter->{"amount:number"},           $::locale->text('Amount')                                          ],
+    [ $filter->{"bank_account_id:integer"}, $::locale->text('Local bank account')                              ],
   );
 
   for (@filters) {
@@ -512,21 +764,21 @@ sub prepare_report {
   my @sortable    = qw(local_bank_name transdate valudate remote_name remote_account_number remote_bank_code amount                                  purpose local_account_number local_bank_code);
 
   my %column_defs = (
-    transdate             => { sub => sub { $_[0]->transdate_as_date } },
-    valutadate            => { sub => sub { $_[0]->valutadate_as_date } },
+    transdate             => { sub   => sub { $_[0]->transdate_as_date } },
+    valutadate            => { sub   => sub { $_[0]->valutadate_as_date } },
     remote_name           => { },
     remote_account_number => { },
     remote_bank_code      => { },
-    amount                => { sub => sub { $_[0]->amount_as_number },
+    amount                => { sub   => sub { $_[0]->amount_as_number },
                                align => 'right' },
-    invoice_amount        => { sub => sub { $_[0]->invoice_amount_as_number },
+    invoice_amount        => { sub   => sub { $_[0]->invoice_amount_as_number },
                                align => 'right' },
-    invoices              => { sub => sub { $_[0]->linked_invoices } },
-    currency              => { sub => sub { $_[0]->currency->name } },
+    invoices              => { sub   => sub { $_[0]->linked_invoices } },
+    currency              => { sub   => sub { $_[0]->currency->name } },
     purpose               => { },
-    local_account_number  => { sub => sub { $_[0]->local_bank_account->account_number } },
-    local_bank_code       => { sub => sub { $_[0]->local_bank_account->bank_code } },
-    local_bank_name       => { sub => sub { $_[0]->local_bank_account->name } },
+    local_account_number  => { sub   => sub { $_[0]->local_bank_account->account_number } },
+    local_bank_code       => { sub   => sub { $_[0]->local_bank_account->bank_code } },
+    local_bank_name       => { sub   => sub { $_[0]->local_bank_account->name } },
     id                    => {},
   );
 
@@ -556,15 +808,31 @@ sub prepare_report {
   );
 }
 
+sub _existing_record_link {
+  my ($bt, $invoice) = @_;
+
+  # check whether a record link from banktransaction $bt already exists to
+  # invoice $invoice, returns 1 if that is the case
+
+  die unless $bt->isa("SL::DB::BankTransaction") && ( $invoice->isa("SL::DB::Invoice") || $invoice->isa("SL::DB::PurchaseInvoice") );
+
+  my $linked_record_to_table = $invoice->is_sales ? 'Invoice' : 'PurchaseInvoice';
+  my $linked_records = $bt->linked_records( direction => 'to', to => $linked_record_to_table, query => [ id => $invoice->id ]  );
+
+  return @$linked_records ? 1 : 0;
+};
+
+sub init_problems { [] }
+
 sub init_models {
   my ($self) = @_;
 
   SL::Controller::Helper::GetModels->new(
     controller => $self,
-    sorted => {
+    sorted     => {
       _default => {
-        by    => 'transdate',
-        dir   => 0,   # 1 = ASC, 0 = DESC : default sort is newest at top
+        by  => 'transdate',
+        dir => 0,   # 1 = ASC, 0 = DESC : default sort is newest at top
       },
       transdate             => t8('Transdate'),
       remote_name           => t8('Remote name'),
@@ -585,3 +853,68 @@ sub init_models {
 }
 
 1;
+__END__
+
+=pod
+
+=encoding utf8
+
+=head1 NAME
+
+SL::Controller::BankTransaction - Posting payments to invoices from
+bank transactions imported earlier
+
+=head1 FUNCTIONS
+
+=over 4
+
+=item C<save_single_bank_transaction %params>
+
+Takes a bank transaction ID (as parameter C<bank_transaction_id> and
+tries to post its amount to a certain number of invoices (parameter
+C<invoice_ids>, an array ref of database IDs to purchase or sales
+invoice objects).
+
+The whole function is wrapped in a database transaction. If an
+exception occurs the bank transaction is not posted at all. The same
+is true if the code detects an error during the execution, e.g. a bank
+transaction that's already been posted earlier. In both cases the
+database transaction will be rolled back.
+
+If warnings but not errors occur the database transaction is still
+committed.
+
+The return value is an error object or C<undef> if the function
+succeeded. The calling function will collect all warnings and errors
+and display them in a nicely formatted table if any occurred.
+
+An error object is a hash reference containing the following members:
+
+=over 2
+
+=item * C<result> — can be either C<warning> or C<error>. Warnings are
+displayed slightly different than errors.
+
+=item * C<message> — a human-readable message included in the list of
+errors meant as the description of why the problem happened
+
+=item * C<bank_transaction_id>, C<invoice_ids> — the same parameters
+that the function was called with
+
+=item * C<bank_transaction> — the database object
+(C<SL::DB::BankTransaction>) corresponding to C<bank_transaction_id>
+
+=item * C<invoices> — an array ref of the database objects (either
+C<SL::DB::Invoice> or C<SL::DB::PurchaseInvoice>) corresponding to
+C<invoice_ids>
+
+=back
+
+=back
+
+=head1 AUTHOR
+
+Niclas Zimmermann E<lt>niclas@kivitendo-premium.deE<gt>,
+Geoffrey Richardson E<lt>information@richardson-bueren.deE<gt>
+
+=cut