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#=====================================================================
# LX-Office ERP
# Copyright (C) 2004
# Based on SQL-Ledger Version 2.1.9
# Web http://www.lx-office.org
#
#=====================================================================
# SQL-Ledger Accounting
# Copyright (c) 2001
#
# Author: Dieter Simader
# Email: dsimader@sql-ledger.org
# Web: http://www.sql-ledger.org
#
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1335, USA.
#======================================================================
#
# Accounts Payables
#
#======================================================================

use POSIX qw(strftime);
use List::Util qw(first max sum);
use List::UtilsBy qw(sort_by);

use SL::AP;
use SL::FU;
use SL::GL;
use SL::Helper::Flash qw(flash flash_later);
use SL::IR;
use SL::IS;
use SL::ReportGenerator;
use SL::DB::BankTransactionAccTrans;
use SL::DB::Chart;
use SL::DB::Currency;
use SL::DB::Default;
use SL::DB::InvoiceItem;
use SL::DB::Order;
use SL::DB::PaymentTerm;
use SL::DB::PurchaseInvoice;
use SL::DB::RecordTemplate;
use SL::DB::Tax;
use SL::DB::ValidityToken;
use SL::Presenter::ItemsList;
use SL::Webdav;
use SL::ZUGFeRD;
use SL::Locale::String qw(t8);

require "bin/mozilla/common.pl";
require "bin/mozilla/reportgenerator.pl";

use strict;

1;

# end of main

# this is for our long dates
# $locale->text('January')
# $locale->text('February')
# $locale->text('March')
# $locale->text('April')
# $locale->text('May ')
# $locale->text('June')
# $locale->text('July')
# $locale->text('August')
# $locale->text('September')
# $locale->text('October')
# $locale->text('November')
# $locale->text('December')

# this is for our short month
# $locale->text('Jan')
# $locale->text('Feb')
# $locale->text('Mar')
# $locale->text('Apr')
# $locale->text('May')
# $locale->text('Jun')
# $locale->text('Jul')
# $locale->text('Aug')
# $locale->text('Sep')
# $locale->text('Oct')
# $locale->text('Nov')
# $locale->text('Dec')

sub _may_view_or_edit_this_invoice {
return 1 if $::auth->assert('ap_transactions', 1); # may edit all invoices
return 0 if !$::form->{id}; # creating new invoices isn't allowed without invoice_edit
return 0 if !$::form->{globalproject_id}; # existing records without a project ID are not allowed
return SL::DB::Project->new(id => $::form->{globalproject_id})->load->may_employee_view_project_invoices(SL::DB::Manager::Employee->current);
}

sub _assert_access {
my $cache = $::request->cache('ap.pl::_assert_access');

$cache->{_may_view_or_edit_this_invoice} = _may_view_or_edit_this_invoice() if !exists $cache->{_may_view_or_edit_this_invoice};
$::form->show_generic_error($::locale->text("You do not have the permissions to access this function.")) if ! $cache->{_may_view_or_edit_this_invoice};
}

sub load_zugferd {
$::auth->assert('ap_transactions');

my $data; # buffer for holding file contents

my $form_defaults = $::form->{form_defaults};
my $file = SL::SessionFile->new($form_defaults->{zugferd_session_file}, mode => '<');
my $file_name = $file->file_name;

$::form->{$_} = $form_defaults->{$_} for keys %{ $form_defaults // {} };

# Defaults
$::form->{title} = "Add";
$::form->{paidaccounts} = 1;

$file->open('<');
if ( ! defined($file->fh->read($data, -s $file->fh)) ) {
SL::Helper::Flash::flash_later('error',
t8('Could not open ZUGFeRD file for reading: #1', $!));
} else {

my %res; # result data structure returned by SL::ZUGFeRD->extract_from_{pdf,xml}()
my $parser; # SL::XMLInvoice object created by SL::ZUGFeRD->extract_from_{pdf,xml}()
my $template_ap; # SL::DB::RecordTemplate object
my $vendor; # SL::DB::Vendor object
my %metadata; # structured data extracted from XML payload
my @items; # list of invoice items
my $default_ap_amount_chart;

if ( $data =~ m/^%PDF/ ) {
%res = %{SL::ZUGFeRD->extract_from_pdf($data)};
} else {
%res = %{SL::ZUGFeRD->extract_from_xml($data)};
}


$parser = $res{'invoice_xml'};
%metadata = %{$parser->metadata};
@items = @{$parser->items};

$default_ap_amount_chart = SL::DB::Manager::Chart->find_by(id => $::instance_conf->get_expense_accno_id);

# Fallback if there's no default AP amount chart configured
unless ( $default_ap_amount_chart ) {
$default_ap_amount_chart = SL::DB::Manager::Chart->find_by(charttype => 'A');
}

my $row = 0;
foreach my $i (@items) {
$row++;

my %item = %{$i};

my $net_total = $::form->format_amount(\%::myconfig, $item{'subtotal'}, 2);
my $desc = $item{'description'};
my $tax_rate = $item{'tax_rate'} / 100; # XML data is usually in percent

my $active_taxkey = $default_ap_amount_chart->taxkey_id;
my $taxes = SL::DB::Manager::Tax->get_all(
where => [ chart_categories => { like => '%' . $default_ap_amount_chart->category . '%' }],
sort_by => 'taxkey, rate',
);

my $tax = first { $tax_rate == $_->rate } @{ $taxes };
$tax //= first { $active_taxkey->tax_id == $_->id } @{ $taxes };
$tax //= $taxes->[0];

# If we really can't find any tax definition (a simple rounding error may
# be sufficient for that to happen), grab the first tax fitting the default
# AP amount chart, just like the AP form would do it for manual entry.
if ( scalar @{$taxes} == 0 ) {
$taxes = SL::DB::Manager::Tax->get_all(
where => [ chart_categories => { like => '%' . $default_ap_amount_chart->category . '%' } ],
);
}

if (!$tax) {
$row--;
next;
}

$::form->{"AP_amount_chart_id_${row}"} = $default_ap_amount_chart->id;
$::form->{"previous_AP_amount_chart_id_${row}"} = $default_ap_amount_chart->id;
$::form->{"amount_${row}"} = $net_total;
$::form->{"taxchart_${row}"} = $tax->id . '--' . $tax->rate;
}

flash('info', $::locale->text("The ZUGFeRD/Factur-X invoice '#1' has been loaded.", $file_name));

$::form->{form_validity_token} = SL::DB::ValidityToken->create(scope => SL::DB::ValidityToken::SCOPE_PURCHASE_INVOICE_POST())->token;
$::form->{rowcount} = $row;

update(
keep_rows_without_amount => 1,
dont_add_new_row => 1,
);
}
}

sub load_record_template {
$::auth->assert('ap_transactions');

# Load existing template and verify that its one for this module.
my $template = SL::DB::RecordTemplate
->new(id => $::form->{id})
->load(
with_object => [ qw(customer payment currency record_items record_items.chart) ],
);

die "invalid template type" unless $template->template_type eq 'ap_transaction';

$template->substitute_variables;

# Clean the current $::form before rebuilding it from the template.
my $form_defaults = delete $::form->{form_defaults};
delete @{ $::form }{ grep { !m{^(?:script|login)$}i } keys %{ $::form } };

# Fill $::form from the template.
my $today = DateTime->today_local;
$::form->{title} = "Add";
$::form->{currency} = $template->currency->name;
$::form->{direct_debit} = $template->direct_debit;
$::form->{globalproject_id} = $template->project_id;
$::form->{payment_id} = $template->payment_id;
$::form->{AP_chart_id} = $template->ar_ap_chart_id;
$::form->{transdate} = $today->to_kivitendo;
$::form->{duedate} = $today->to_kivitendo;
$::form->{rowcount} = @{ $template->items };
$::form->{paidaccounts} = 1;
$::form->{$_} = $template->$_ for qw(department_id ordnumber taxincluded notes transaction_description);

if ($template->vendor) {
$::form->{vendor_id} = $template->vendor_id;
$::form->{vendor} = $template->vendor->name;
$::form->{duedate} = $template->vendor->payment->calc_date(reference_date => $today)->to_kivitendo if $template->vendor->payment;
}

my $row = 0;
foreach my $item (@{ $template->items }) {
$row++;

my $active_taxkey = $item->chart->get_active_taxkey;
my $taxes = SL::DB::Manager::Tax->get_all(
where => [ chart_categories => { like => '%' . $item->chart->category . '%' }],
sort_by => 'taxkey, rate',
);

my $tax = first { $item->tax_id == $_->id } @{ $taxes };
$tax //= first { $active_taxkey->tax_id == $_->id } @{ $taxes };
$tax //= $taxes->[0];

if (!$tax) {
$row--;
next;
}

$::form->{"AP_amount_chart_id_${row}"} = $item->chart_id;
$::form->{"previous_AP_amount_chart_id_${row}"} = $item->chart_id;
$::form->{"amount_${row}"} = $::form->format_amount(\%::myconfig, $item->amount1, 2);
$::form->{"taxchart_${row}"} = $item->tax_id . '--' . $tax->rate;
$::form->{"project_id_${row}"} = $item->project_id;
}

$::form->{$_} = $form_defaults->{$_} for keys %{ $form_defaults // {} };

flash('info', $::locale->text("The record template '#1' has been loaded.", $template->template_name));
flash('info', $::locale->text("Payment bookings disallowed. After the booking this record may be " .
"suggested with the amount of '#1' or otherwise has to be choosen manually." .
" No automatic payment booking will be done to chart '#2'.",
$form_defaults->{paid_1_suggestion},
$form_defaults->{AP_paid_1_suggestion},
)) if $::form->{no_payment_bookings};

$::form->{form_validity_token} = SL::DB::ValidityToken->create(scope => SL::DB::ValidityToken::SCOPE_PURCHASE_INVOICE_POST())->token;

update(
keep_rows_without_amount => 1,
dont_add_new_row => 1,
);
}

sub save_record_template {
$::auth->assert('ap_transactions');

my $template = $::form->{record_template_id} ? SL::DB::RecordTemplate->new(id => $::form->{record_template_id})->load : SL::DB::RecordTemplate->new;
my $js = SL::ClientJS->new(controller => SL::Controller::Base->new);
my $new_name = $template->template_name_to_use($::form->{record_template_new_template_name});

$js->dialog->close('#record_template_dialog');

my @items = grep {
$_->{chart_id} && (($_->{tax_id} // '') ne '')
} map {
+{ chart_id => $::form->{"AP_amount_chart_id_${_}"},
amount1 => $::form->parse_amount(\%::myconfig, $::form->{"amount_${_}"}),
tax_id => (split m{--}, $::form->{"taxchart_${_}"})[0],
project_id => $::form->{"project_id_${_}"} || undef,
}
} (1..($::form->{rowcount} || 1));

$template->assign_attributes(
template_type => 'ap_transaction',
template_name => $new_name,

currency_id => SL::DB::Manager::Currency->find_by(name => $::form->{currency})->id,
ar_ap_chart_id => $::form->{AP_chart_id} || undef,
vendor_id => $::form->{vendor_id} || undef,
department_id => $::form->{department_id} || undef,
project_id => $::form->{globalproject_id} || undef,
payment_id => $::form->{payment_id} || undef,
taxincluded => $::form->{taxincluded} ? 1 : 0,
direct_debit => $::form->{direct_debit} ? 1 : 0,
ordnumber => $::form->{ordnumber},
notes => $::form->{notes},
transaction_description => $::form->{transaction_description},

items => \@items,
);

eval {
$template->save;
1;
} or do {
return $js
->flash('error', $::locale->text("Saving the record template '#1' failed.", $new_name))
->render;
};

return $js
->flash('info', $::locale->text("The record template '#1' has been saved.", $new_name))
->render;
}

sub add {
$main::lxdebug->enter_sub();

my $form = $main::form;
my %myconfig = %main::myconfig;

$main::auth->assert('ap_transactions');

$form->{title} = "Add";

$form->{callback} = "ap.pl?action=add" unless $form->{callback};

AP->get_transdate(\%myconfig, $form);
$form->{initial_transdate} = $form->{transdate};
create_links(dont_save => 1);
$form->{transdate} = $form->{initial_transdate};

if ($form->{vendor_id}) {
my $vendor = SL::DB::Vendor->load_cached($form->{vendor_id});

# set initial payment terms
$form->{payment_id} = $vendor->payment_id;

my $last_used_ap_chart = $vendor->last_used_ap_chart;
$form->{"AP_amount_chart_id_1"} = $last_used_ap_chart->id if $last_used_ap_chart;
}

if (!$form->{form_validity_token}) {
$form->{form_validity_token} = SL::DB::ValidityToken->create(scope => SL::DB::ValidityToken::SCOPE_PURCHASE_INVOICE_POST())->token;
}

&display_form;

$main::lxdebug->leave_sub();
}

sub edit {
$main::lxdebug->enter_sub();

# Delay access check to after the invoice's been loaded in
# "create_links" so that project-specific invoice rights can be
# evaluated.

my $form = $main::form;

$form->{title} = "Edit";

create_links();
&display_form;

$main::lxdebug->leave_sub();
}

sub display_form {
$main::lxdebug->enter_sub();

_assert_access();

my $form = $main::form;

# get all files stored in the webdav folder
if ($form->{invnumber} && $::instance_conf->get_webdav) {
my $webdav = SL::Webdav->new(
type => 'accounts_payable',
number => $form->{invnumber},
);
my @all_objects = $webdav->get_all_objects;
@{ $form->{WEBDAV} } = map { { name => $_->filename,
type => t8('File'),
link => File::Spec->catfile($_->full_filedescriptor),
} } @all_objects;
}
&form_header;
&form_footer;

$main::lxdebug->leave_sub();
}

sub create_links {
$main::lxdebug->enter_sub();

# Delay access check to after the invoice's been loaded so that
# project-specific invoice rights can be evaluated.

my %params = @_;

my $form = $main::form;
my %myconfig = %main::myconfig;

$form->create_links("AP", \%myconfig, "vendor");

_assert_access();

my %saved;
if (!$params{dont_save}) {
%saved = map { ($_ => $form->{$_}) } qw(direct_debit taxincluded);
$saved{duedate} = $form->{duedate} if $form->{duedate};
$saved{currency} = $form->{currency} if $form->{currency};
$saved{taxincluded} = $form->{taxincluded} if $form->{taxincluded};
$saved{intnotes} = $form->{intnotes} if $form->{intnotes};
}

IR->get_vendor(\%myconfig, \%$form);

$form->{$_} = $saved{$_} for keys %saved;
$form->{rowcount} = 1;
$form->{AP_chart_id} = $form->{acc_trans} && $form->{acc_trans}->{AP} ? $form->{acc_trans}->{AP}->[0]->{chart_id} : $::instance_conf->get_ap_chart_id || $form->{AP_links}->{AP}->[0]->{chart_id};

# build the popup menus
$form->{taxincluded} = ($form->{id}) ? $form->{taxincluded} : "checked";

$::form->{ALL_DEPARTMENTS} = SL::DB::Manager::Department->get_all_sorted;

$form->{employee} = "$form->{employee}--$form->{employee_id}";

AP->setup_form($form);

$main::lxdebug->leave_sub();
}

sub _sort_payments {
my @fields = qw(acc_trans_id gldate datepaid source memo paid AP_paid paid_project_id);
my @payments =
grep { $_->{paid} != 0 }
map {
my $idx = $_;
+{ map { ($_ => delete($::form->{"${_}_${idx}"})) } @fields }
} (1..$::form->{paidaccounts});

@payments = sort_by { DateTime->from_kivitendo($_->{datepaid}) } @payments;

$::form->{paidaccounts} = max scalar(@payments), 1;

foreach my $idx (1 .. scalar(@payments)) {
my $payment = $payments[$idx - 1];
$::form->{"${_}_${idx}"} = $payment->{$_} for @fields;
}
}

sub form_header {
$main::lxdebug->enter_sub();

_assert_access();

my $form = $main::form;
my %myconfig = %main::myconfig;
my $locale = $main::locale;
my $cgi = $::request->{cgi};

$::form->{invoice_obj} = SL::DB::PurchaseInvoice->new(id => $::form->{id})->load if $::form->{id};

$form->{initial_focus} = !($form->{amount_1} * 1) ? 'vendor_id' : 'row_' . $form->{rowcount};

$form->{title_} = $form->{title};
$form->{title} = $form->{title} eq 'Add' ? $locale->text('Add Accounts Payables Transaction') : $locale->text('Edit Accounts Payables Transaction');

# type=submit $locale->text('Add Accounts Payables Transaction')
# type=submit $locale->text('Edit Accounts Payables Transaction')

# currencies
$form->{defaultcurrency} = $form->get_default_currency(\%myconfig);
if ($form->{currency} ne $form->{defaultcurrency} && !$form->{exchangerate}) {
my $transdate = $form->{transdate} ? DateTime->from_kivitendo($form->{transdate}) : DateTime->today_local;
($form->{exchangerate}, $form->{record_forex}) = $form->{id}
? $form->check_exchangerate(\%myconfig, $form->{currency}, $form->{transdate}, "sell", $form->{id}, 'ap')
: $form->check_exchangerate(\%myconfig, $form->{currency}, $transdate, "sell");
}

# format amounts
$form->{creditlimit} = $form->format_amount(\%myconfig, $form->{creditlimit}, 0, "0");
$form->{creditremaining} = $form->format_amount(\%myconfig, $form->{creditremaining}, 0, "0");

my $rows;
if (($rows = $form->numtextrows($form->{notes}, 50)) < 2) {
$rows = 2;
}
$form->{textarea_rows} = $rows;

$form->{creditremaining_plus} = ($form->{creditremaining} =~ /-/) ? "0" : "1";

$form->get_lists("charts" => { "key" => "ALL_CHARTS",
"transdate" => $form->{transdate} },
);

map(
{ $_->{link_split} = [ split(/:/, $_->{link}) ]; }
@{ $form->{ALL_CHARTS} }
);

$form->{ALL_DEPARTMENTS} = SL::DB::Manager::Department->get_all_sorted;

my %project_labels = map { $_->id => $_->projectnumber } @{ SL::DB::Manager::Project->get_all };

my (%charts, %bank_accounts);
my $default_ap_amount_chart_id;
# don't add manual bookings for charts which are assigned to real bank accounts
# and are flagged for use with bank import
my $bank_accounts = SL::DB::Manager::BankAccount->get_all();
foreach my $bank (@{ $bank_accounts }) {
if ($bank->use_with_bank_import) {
my $accno_paid_bank = $bank->chart->accno;
$bank_accounts{$accno_paid_bank} = 1;
}
}

foreach my $item (@{ $form->{ALL_CHARTS} }) {
if ( grep({ $_ eq 'AP_amount' } @{ $item->{link_split} }) ) {
$default_ap_amount_chart_id //= $item->{id};

} elsif ( grep({ $_ eq 'AP_paid' } @{ $item->{link_split} }) ) {
next if $bank_accounts{$item->{accno}};
push(@{ $form->{ALL_CHARTS_AP_paid} }, $item);
}

$charts{$item->{accno}} = $item;
}

my $follow_up_vc = $form->{vendor_id} ? SL::DB::Vendor->load_cached($form->{vendor_id})->name : '';
my $follow_up_trans_info = "$form->{invnumber} ($follow_up_vc)";

$::request->layout->add_javascripts("autocomplete_chart.js", "show_vc_details.js", "show_history.js", "follow_up.js", "kivi.Draft.js", "kivi.SalesPurchase.js", "kivi.GL.js", "kivi.RecordTemplate.js", "kivi.File.js", "kivi.AP.js", "kivi.CustomerVendor.js", "kivi.Validator.js", "autocomplete_project.js");
# $form->{totalpaid} is used by the action bar setup to determine
# whether or not canceling is allowed. Therefore it must be
# calculated prior to the action bar setup.
$form->{totalpaid} = sum map { $form->{"paid_${_}"} } (1..$form->{paidaccounts});

setup_ap_display_form_action_bar();

$form->header();
# get the correct date for tax
my $transdate = $::form->{transdate} ? DateTime->from_kivitendo($::form->{transdate}) : DateTime->today_local;
my $deliverydate = $::form->{deliverydate} ? DateTime->from_kivitendo($::form->{deliverydate}) : undef;
my $taxdate = $deliverydate ? $deliverydate : $transdate;
# helper for loop
my $first_taxchart;

for my $i (1 .. $form->{rowcount}) {

# format amounts
$form->{"amount_$i"} = $form->format_amount(\%myconfig, $form->{"amount_$i"}, 2);
$form->{"tax_$i"} = $form->format_amount(\%myconfig, $form->{"tax_$i"}, 2);

my ($default_taxchart, $taxchart_to_use);
my $used_tax_id;
if ( $form->{"taxchart_$i"} ) {
($used_tax_id) = split(/--/, $form->{"taxchart_$i"});
}
my $amount_chart_id = $form->{"AP_amount_chart_id_$i"} || $default_ap_amount_chart_id;

my @taxcharts = GL->get_active_taxes_for_chart($amount_chart_id, $taxdate, $used_tax_id);
foreach my $item (@taxcharts) {
my $key = $item->id . "--" . $item->rate;
$first_taxchart //= $item;
$default_taxchart = $item if $item->{is_default};
$taxchart_to_use = $item if $key eq $form->{"taxchart_$i"};
}

$taxchart_to_use //= $default_taxchart // $first_taxchart;
my $selected_taxchart = $taxchart_to_use->id . '--' . $taxchart_to_use->rate;
$form->{"selected_taxchart_$i"} = $selected_taxchart;
$form->{"AP_amount_chart_id_$i"} = $amount_chart_id;
$form->{"taxcharts_$i"} = \@taxcharts;

# reverse charge hack for template, display two taxes
if ($taxchart_to_use->reverse_charge_chart_id) {
my $tmpnetamount;
($tmpnetamount, $form->{"tax_reverse_$i"}) = $form->calculate_tax($form->parse_amount(\%myconfig, $form->{"amount_$i"}),
$taxchart_to_use->rate, $form->{taxincluded}, 2 );

$form->{"tax_charge_$i"} = $form->{"tax_reverse_$i"} * -1;
$form->{"tax_reverse_$i"} = $form->format_amount(\%myconfig, $form->{"tax_reverse_$i"}, 2);
$form->{"tax_charge_$i"} = $form->format_amount(\%myconfig, $form->{"tax_charge_$i"}, 2);
}
}

$form->{taxchart_value_title_sub} = sub {
my $item = shift;
return [
$item->{id} .'--'. $item->{rate},
$item->{taxkey} . ' - ' . $item->{taxdescription} .' '. ($item->{rate} * 100) .' %',
];
};

$form->{AP_paid_value_title_sub} = sub {
my $item = shift;
return [
$item->{accno},
$item->{accno} .'--'. $item->{description}
];
};

$form->{invtotal_unformatted} = $form->{invtotal};
$form->{invtotal} = $form->format_amount(\%myconfig, $form->{invtotal}, 2);

_sort_payments();

if ( $form->{'paid_'. $form->{paidaccounts}} ) {
$form->{paidaccounts}++;
}

# default account for current assets (i.e. 1801 - SKR04)
$form->{accno_arap} = IS->get_standard_accno_current_assets(\%myconfig, \%$form);

for my $i (1 .. $form->{paidaccounts}) {
# hook for calc of of fx_paid and check if banktransaction has a record exchangerate
if ($form->{"exchangerate_$i"}) {
my $bt_acc_trans = SL::DB::Manager::BankTransactionAccTrans->find_by(acc_trans_id => $form->{"acc_trans_id_$i"});
if ($bt_acc_trans) {
if ($bt_acc_trans->bank_transaction->exchangerate > 0) {
$form->{"exchangerate_$i"} = $bt_acc_trans->bank_transaction->exchangerate;
$form->{"forex_$i"} = $form->{"exchangerate_$i"};
$form->{"record_forex_$i"} = 1;
}
}
$form->{"fx_paid_$i"} = $form->{"paid_$i"} / $form->{"exchangerate_$i"};
$form->{"fx_totalpaid"} += $form->{"fx_paid_$i"};
} # end hook fx_paid
# format amounts
if ($form->{"paid_$i"}) {
$form->{"paid_$i"} = $form->format_amount(\%myconfig, $form->{"paid_$i"}, 2);
}
if ($form->{"exchangerate_$i"} == 0) {
$form->{"exchangerate_$i"} = "";
} else {
$form->{"exchangerate_$i"} =
$form->format_amount(\%myconfig, $form->{"exchangerate_$i"});
}

my $changeable = 1;
if (SL::DB::Default->get->payments_changeable == 0) {
# never
$changeable = ($form->{"acc_trans_id_$i"})? 0 : 1;
}
if (SL::DB::Default->get->payments_changeable == 2) {
# on the same day
$changeable = (($form->{"gldate_$i"} eq '') || $form->current_date(\%myconfig) eq $form->{"gldate_$i"});
}

#deaktivieren von gebuchten Zahlungen ausserhalb der Bücherkontrolle, vorher prüfen ob heute eingegeben
if ($form->date_closed($form->{"gldate_$i"})) {
$changeable = 0;
}

$form->{'paidaccount_changeable_'. $i} = $changeable;

$form->{'labelpaid_project_id_'. $i} = $project_labels{$form->{'paid_project_id_'. $i}};
# accno and description as info text
$form->{'AP_paid_readonly_desc_' . $i} = $form->{'AP_paid_' . $i} ?
$form->{'AP_paid_' . $i} . " " . SL::DB::Manager::Chart->find_by(accno => $form->{'AP_paid_' . $i})->description
: '';
}
$form->{paid_missing} = $::form->{is_linked_bank_transaction} && $form->{invoice_obj}->forex ?
$form->{invoice_obj}->open_amount
: $form->{invtotal_unformatted} - $form->{totalpaid};

$form->{payment_id} = $form->{invoice_obj}->{payment_id} // $form->{payment_id};
print $form->parse_html_template('ap/form_header', {
today => DateTime->today,
currencies => SL::DB::Manager::Currency->get_all_sorted,
payment_terms => SL::DB::Manager::PaymentTerm->get_all_sorted(query => [ or => [ obsolete => 0, id => $form->{payment_id}*1 ]]),
});

$main::lxdebug->leave_sub();
}

sub form_footer {
$::lxdebug->enter_sub;

_assert_access();

my $num_due;
my $num_follow_ups;
if ($::form->{id}) {
my $follow_ups = FU->follow_ups('trans_id' => $::form->{id}, 'not_done' => 1);

if (@{ $follow_ups }) {
$num_due = sum map { $_->{due} * 1 } @{ $follow_ups };
$num_follow_ups = scalar @{ $follow_ups }
}
}

my $transdate = $::form->datetonum($::form->{transdate}, \%::myconfig);
my $closedto = $::form->datetonum($::form->{closedto}, \%::myconfig);

my $storno = $::form->{id}
&& !IS->has_storno(\%::myconfig, $::form, 'ap')
&& !IS->is_storno( \%::myconfig, $::form, 'ap', $::form->{id})
&& ($::form->{totalpaid} == 0 || $::form->{totalpaid} eq '');

$::form->header;
print $::form->parse_html_template('ap/form_footer', {
num_due => $num_due,
num_follow_ups => $num_follow_ups,
});

$::lxdebug->leave_sub;
}

sub mark_as_paid {
$::auth->assert('ap_transactions');

SL::DB::PurchaseInvoice->new(id => $::form->{id})->load->mark_as_paid;

$::form->redirect($::locale->text("Marked as paid"));
}

sub block_or_unblock_sepa_transfer {
$::auth->assert('ap_transactions');

my $invoice = SL::DB::PurchaseInvoice->new(id => $::form->{id})->load;
$invoice->update_attributes(is_sepa_blocked => 0) if $::form->{unblock_sepa} && $invoice->is_sepa_blocked;
$invoice->update_attributes(is_sepa_blocked => 1) if !$::form->{unblock_sepa} && !$invoice->is_sepa_blocked;

$::form->redirect($::form->{unblock_sepa} ? t8('Bank transfer via SEPA is unblocked') : t8('Bank transfer via SEPA is blocked'));
}

sub show_draft {
$::form->{transdate} = DateTime->today_local->to_kivitendo if !$::form->{transdate};
$::form->{gldate} = $::form->{transdate} if !$::form->{gldate};
$::form->{form_validity_token} = SL::DB::ValidityToken->create(scope => SL::DB::ValidityToken::SCOPE_PURCHASE_INVOICE_POST())->token;
update();
}

sub update {
my %params = @_;

$main::lxdebug->enter_sub();

my $form = $main::form;
my %myconfig = %main::myconfig;

$main::auth->assert('ap_transactions');

my $display = shift;

$form->{invtotal} = 0;

delete @{ $form }{ grep { m/^tax_\d+$/ } keys %{ $form } };

map { $form->{$_} = $form->parse_amount(\%myconfig, $form->{$_}) }
qw(exchangerate creditlimit creditremaining);

my @flds = qw(amount AP_amount_chart_id projectnumber oldprojectnumber project_id taxchart tax);
my $count = 0;
my (@a, $j, $totaltax);
for my $i (1 .. $form->{rowcount}) {
$form->{"amount_$i"} = $form->parse_amount(\%myconfig, $form->{"amount_$i"});
if ($form->{"amount_$i"} || $params{keep_rows_without_amount}) {
push @a, {};
$j = $#a;
my ($taxkey, $rate) = split(/--/, $form->{"taxchart_$i"});

# calculate tax exactly the same way as AP in post_transaction via form->calculate_tax
my $tmpnetamount;
($tmpnetamount,$form->{"tax_$i"}) = $form->calculate_tax($form->{"amount_$i"},$rate,$form->{taxincluded},2);
$totaltax += $form->{"tax_$i"};
map { $a[$j]->{$_} = $form->{"${_}_$i"} } @flds;
$count++;
}
}
$form->redo_rows(\@flds, \@a, $count, $form->{rowcount});

map { $form->{invtotal} += $form->{"amount_$_"} } (1 .. $form->{rowcount});

$form->{invdate} = $form->{transdate};

if (($form->{previous_vendor_id} || $form->{vendor_id}) != $form->{vendor_id}) {
IR->get_vendor(\%::myconfig, $form);

my $vendor = SL::DB::Vendor->load_cached($form->{vendor_id});

# reset payment to new vendor
$form->{payment_id} = $vendor->payment_id;

if (($form->{rowcount} == 1) && ($form->{amount_1} == 0)) {
my $last_used_ap_chart = $vendor->last_used_ap_chart;
$form->{"AP_amount_chart_id_1"} = $last_used_ap_chart->id if $last_used_ap_chart;
}
}

$form->{rowcount} = $count + ($params{dont_add_new_row} ? 0 : 1);

$form->{invtotal} =
($form->{taxincluded}) ? $form->{invtotal} : $form->{invtotal} + $totaltax;

my $totalpaid;
for my $i (1 .. $form->{paidaccounts}) {
if ($form->parse_amount(\%myconfig, $form->{"paid_$i"})) {
map {
$form->{"${_}_$i"} =
$form->parse_amount(\%myconfig, $form->{"${_}_$i"})
} qw(paid exchangerate);

$totalpaid += $form->{"paid_$i"};

$form->{"forex_$i"} = $form->check_exchangerate( \%myconfig, $form->{currency}, $form->{"datepaid_$i"}, 'sell');
$form->{"exchangerate_$i"} = $form->{"forex_$i"} if $form->{"forex_$i"};
}
}

$form->{creditremaining} -=
($form->{invtotal} - $totalpaid + $form->{oldtotalpaid} -
$form->{oldinvtotal});
$form->{oldinvtotal} = $form->{invtotal};
$form->{oldtotalpaid} = $totalpaid;

display_form();

$main::lxdebug->leave_sub();
}


sub post_payment {
$main::lxdebug->enter_sub();

my $form = $main::form;
my %myconfig = %main::myconfig;
my $locale = $main::locale;

$main::auth->assert('ap_transactions');
$form->mtime_ischanged('ap');

$form->{defaultcurrency} = $form->get_default_currency(\%myconfig);

my $invdate = $form->datetonum($form->{transdate}, \%myconfig);

for my $i (1 .. $form->{paidaccounts}) {
if ($form->parse_amount(\%myconfig, $form->{"paid_$i"})) {
my $datepaid = $form->datetonum($form->{"datepaid_$i"}, \%myconfig);

$form->isblank("datepaid_$i", $locale->text('Payment date missing!'));

$form->error($locale->text('Cannot post transaction above the maximum future booking date!'))
if ($form->date_max_future($form->{"datepaid_$i"}, \%myconfig));

#Zusätzlich noch das Buchungsdatum in die Bücherkontrolle einbeziehen
# (Dient zur Prüfung ob ZE oder ZA geprüft werden soll)
$form->error($locale->text('Cannot post payment for a closed period!'))
if ($form->date_closed($form->{"datepaid_$i"}) && !$form->date_closed($form->{"gldate_$i"}, \%myconfig));

if ($form->{defaultcurrency} && ($form->{currency} ne $form->{defaultcurrency})) {
$form->{"exchangerate_$i"} = $form->{exchangerate}
if ($invdate == $datepaid);
$form->isblank("exchangerate_$i",
$locale->text('Exchangerate for payment missing!'));
}
}
}

($form->{AP}) = split /--/, $form->{AP};
($form->{AP_paid}) = split /--/, $form->{AP_paid};
if (AP->post_payment(\%myconfig, \%$form)) {
$form->{snumbers} = qq|invnumber_| . $form->{invnumber};
$form->{what_done} = 'invoice';
$form->{addition} = "PAYMENT POSTED";
$form->save_history;
$form->redirect($locale->text('Payment posted!'))
} else {
$form->error($locale->text('Cannot post payment!'));
};


$main::lxdebug->leave_sub();
}


sub post {
$main::lxdebug->enter_sub();

my $form = $main::form;
my %myconfig = %main::myconfig;
my $locale = $main::locale;

$main::auth->assert('ap_transactions');
$form->mtime_ischanged('ap');

my ($inline) = @_;

# check if there is a vendor, invoice, due date and invnumber
$form->isblank("