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kivitendo/SL/DATEV.pm @ 28fc2476

#=====================================================================
# kivitendo ERP
# Copyright (c) 2004
#
# Author: Philip Reetz
# Email: p.reetz@linet-services.de
# Web: http://www.lx-office.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., 675 Mass Ave, Cambridge, MA 02139, USA.
#======================================================================
#
# Datev export module
#======================================================================

package SL::DATEV;

use utf8;
use strict;

use SL::DBUtils;
use SL::DATEV::KNEFile;
use SL::DB;
use SL::HTML::Util ();
use SL::Locale::String qw(t8);

use Data::Dumper;
use DateTime;
use Exporter qw(import);
use File::Path;
use IO::File;
use List::MoreUtils qw(any);
use List::Util qw(min max sum);
use List::UtilsBy qw(partition_by sort_by);
use Text::CSV_XS;
use Time::HiRes qw(gettimeofday);

{
my $i = 0;
use constant {
DATEV_ET_BUCHUNGEN => $i++,
DATEV_ET_STAMM => $i++,
DATEV_ET_CSV => $i++,

DATEV_FORMAT_KNE => $i++,
DATEV_FORMAT_OBE => $i++,
};
}

my @export_constants = qw(DATEV_ET_BUCHUNGEN DATEV_ET_STAMM DATEV_ET_CSV DATEV_FORMAT_KNE DATEV_FORMAT_OBE);
our @EXPORT_OK = (@export_constants);
our %EXPORT_TAGS = (CONSTANTS => [ @export_constants ]);


sub new {
my $class = shift;
my %data = @_;

my $obj = bless {}, $class;

$obj->$_($data{$_}) for keys %data;

$obj;
}

sub exporttype {
my $self = shift;
$self->{exporttype} = $_[0] if @_;
return $self->{exporttype};
}

sub has_exporttype {
defined $_[0]->{exporttype};
}

sub format {
my $self = shift;
$self->{format} = $_[0] if @_;
return $self->{format};
}

sub has_format {
defined $_[0]->{format};
}

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

my ($a, $b) = gettimeofday();
my $path = _get_path_for_download_token("${a}-${b}-${$}");

mkpath($path) unless (-d $path);

$main::lxdebug->leave_sub();

return $path;
}

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

my $token = shift || '';
my $path;

if ($token =~ m|^(\d+)-(\d+)-(\d+)$|) {
$path = $::lx_office_conf{paths}->{userspath} . "/datev-export-${1}-${2}-${3}/";
}

$main::lxdebug->leave_sub();

return $path;
}

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

my $path = shift;
my $token;

if ($path =~ m|.*datev-export-(\d+)-(\d+)-(\d+)/?$|) {
$token = "${1}-${2}-${3}";
}

$main::lxdebug->leave_sub();

return $token;
}

sub download_token {
my $self = shift;
$self->{download_token} = $_[0] if @_;
return $self->{download_token} ||= _get_download_token_for_path($self->export_path);
}

sub export_path {
my ($self) = @_;

return $self->{export_path} ||= _get_path_for_download_token($self->{download_token}) || _get_export_path();
}

sub add_filenames {
my $self = shift;
push @{ $self->{filenames} ||= [] }, @_;
}

sub filenames {
return @{ $_[0]{filenames} || [] };
}

sub add_error {
my $self = shift;
push @{ $self->{errors} ||= [] }, @_;
}

sub errors {
return @{ $_[0]{errors} || [] };
}

sub add_net_gross_differences {
my $self = shift;
push @{ $self->{net_gross_differences} ||= [] }, @_;
}

sub net_gross_differences {
return @{ $_[0]{net_gross_differences} || [] };
}

sub sum_net_gross_differences {
return sum $_[0]->net_gross_differences;
}

sub from {
my $self = shift;

if (@_) {
$self->{from} = $_[0];
}

return $self->{from};
}

sub to {
my $self = shift;

if (@_) {
$self->{to} = $_[0];
}

return $self->{to};
}

sub trans_id {
my $self = shift;

if (@_) {
$self->{trans_id} = $_[0];
}

die "illegal trans_id passed for DATEV export: " . $self->{trans_id} . "\n" unless $self->{trans_id} =~ m/^\d+$/;

return $self->{trans_id};
}

sub accnofrom {
my $self = shift;

if (@_) {
$self->{accnofrom} = $_[0];
}

return $self->{accnofrom};
}

sub accnoto {
my $self = shift;

if (@_) {
$self->{accnoto} = $_[0];
}

return $self->{accnoto};
}


sub dbh {
my $self = shift;

if (@_) {
$self->{dbh} = $_[0];
$self->{provided_dbh} = 1;
}

$self->{dbh} ||= SL::DB->client->dbh;
}

sub provided_dbh {
$_[0]{provided_dbh};
}

sub clean_temporary_directories {
$::lxdebug->enter_sub;

foreach my $path (glob($::lx_office_conf{paths}->{userspath} . "/datev-export-*")) {
next unless -d $path;

my $mtime = (stat($path))[9];
next if ((time() - $mtime) < 8 * 60 * 60);

rmtree $path;
}

$::lxdebug->leave_sub;
}

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

my $text = shift // '';
my $field_len = shift;
my $fill_char = shift;
my $alignment = shift || 'right';

my $text_len = length $text;

if ($field_len < $text_len) {
$text = substr $text, 0, $field_len;

} elsif ($field_len > $text_len) {
my $filler = ($fill_char) x ($field_len - $text_len);
$text = $alignment eq 'right' ? $filler . $text : $text . $filler;
}

$main::lxdebug->leave_sub();

return $text;
}

sub get_datev_stamm {
return $_[0]{stamm} ||= selectfirst_hashref_query($::form, $_[0]->dbh, 'SELECT * FROM datev');
}

sub save_datev_stamm {
my ($self, $data) = @_;

SL::DB->client->with_transaction(sub {
do_query($::form, $self->dbh, 'DELETE FROM datev');

my @columns = qw(beraternr beratername dfvkz mandantennr datentraegernr abrechnungsnr);

my $query = "INSERT INTO datev (" . join(', ', @columns) . ") VALUES (" . join(', ', ('?') x @columns) . ")";
do_query($::form, $self->dbh, $query, map { $data->{$_} } @columns);
1;
}) or do { die SL::DB->client->error };
}

sub export {
my ($self) = @_;
my $result;

die 'no format set!' unless $self->has_format;

if ($self->format == DATEV_FORMAT_KNE) {
$result = $self->kne_export;
} elsif ($self->format == DATEV_FORMAT_OBE) {
$result = $self->obe_export;
} else {
die 'unrecognized export format';
}

return $result;
}

sub kne_export {
my ($self) = @_;
my $result;

die 'no exporttype set!' unless $self->has_exporttype;

if ($self->exporttype == DATEV_ET_BUCHUNGEN) {
$result = $self->kne_buchungsexport;
} elsif ($self->exporttype == DATEV_ET_STAMM) {
$result = $self->kne_stammdatenexport;
} elsif ($self->exporttype == DATEV_ET_CSV) {
$result = $self->csv_export_for_tax_accountant;
} else {
die 'unrecognized exporttype';
}

return $result;
}

sub obe_export {
die 'not yet implemented';
}

sub fromto {
my ($self) = @_;

return unless $self->from && $self->to;

return "transdate >= '" . $self->from->to_lxoffice . "' and transdate <= '" . $self->to->to_lxoffice . "'";
}

sub _sign {
$_[0] <=> 0;
}

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

my ($self, %params) = @_;
my $fromto = $params{from_to};
my $progress_callback = $params{progress_callback} || sub {};

my $form = $main::form;

my $trans_id_filter = '';

if ( $self->{trans_id} ) {
# ignore dates when trans_id is passed so that the entire transaction is
# checked, not just either the initial bookings or the subsequent payments
# (the transdates will likely differ)
$fromto = '';
$trans_id_filter = 'ac.trans_id = ' . $self->trans_id;
} else {
$fromto =~ s/transdate/ac\.transdate/g;
};

my ($notsplitindex);

my $filter = ''; # Useful for debugging purposes

my %all_taxchart_ids = selectall_as_map($form, $self->dbh, qq|SELECT DISTINCT chart_id, TRUE AS is_set FROM tax|, 'chart_id', 'is_set');

my $query =
qq|SELECT ac.acc_trans_id, ac.transdate, ac.gldate, ac.trans_id,ar.id, ac.amount, ac.taxkey, ac.memo,
ar.invnumber, ar.duedate, ar.amount as umsatz, ar.deliverydate, ar.itime::date,
ct.name, ct.ustid, ct.customernumber AS vcnumber, ct.id AS customer_id, NULL AS vendor_id,
c.accno, c.description AS accname, c.taxkey_id as charttax, c.datevautomatik, c.id, ac.chart_link AS link,
ar.invoice,
t.rate AS taxrate, t.taxdescription,
'ar' as table,
tc.accno AS tax_accno, tc.description AS tax_accname,
ar.notes
FROM acc_trans ac
LEFT JOIN ar ON (ac.trans_id = ar.id)
LEFT JOIN customer ct ON (ar.customer_id = ct.id)
LEFT JOIN chart c ON (ac.chart_id = c.id)
LEFT JOIN tax t ON (ac.tax_id = t.id)
LEFT JOIN chart tc ON (t.chart_id = tc.id)
WHERE (ar.id IS NOT NULL)
AND $fromto
$trans_id_filter
$filter

UNION ALL

SELECT ac.acc_trans_id, ac.transdate, ac.gldate, ac.trans_id,ap.id, ac.amount, ac.taxkey, ac.memo,
ap.invnumber, ap.duedate, ap.amount as umsatz, ap.deliverydate, ap.itime::date,
ct.name, ct.ustid, ct.vendornumber AS vcnumber, NULL AS customer_id, ct.id AS vendor_id,
c.accno, c.description AS accname, c.taxkey_id as charttax, c.datevautomatik, c.id, ac.chart_link AS link,
ap.invoice,
t.rate AS taxrate, t.taxdescription,
'ap' as table,
tc.accno AS tax_accno, tc.description AS tax_accname,
ap.notes
FROM acc_trans ac
LEFT JOIN ap ON (ac.trans_id = ap.id)
LEFT JOIN vendor ct ON (ap.vendor_id = ct.id)
LEFT JOIN chart c ON (ac.chart_id = c.id)
LEFT JOIN tax t ON (ac.tax_id = t.id)
LEFT JOIN chart tc ON (t.chart_id = tc.id)
WHERE (ap.id IS NOT NULL)
AND $fromto
$trans_id_filter
$filter

UNION ALL

SELECT ac.acc_trans_id, ac.transdate, ac.gldate, ac.trans_id,gl.id, ac.amount, ac.taxkey, ac.memo,
gl.reference AS invnumber, gl.transdate AS duedate, ac.amount as umsatz, NULL as deliverydate, gl.itime::date,
gl.description AS name, NULL as ustid, '' AS vcname, NULL AS customer_id, NULL AS vendor_id,
c.accno, c.description AS accname, c.taxkey_id as charttax, c.datevautomatik, c.id, ac.chart_link AS link,
FALSE AS invoice,
t.rate AS taxrate, t.taxdescription,
'gl' as table,
tc.accno AS tax_accno, tc.description AS tax_accname,
gl.notes
FROM acc_trans ac
LEFT JOIN gl ON (ac.trans_id = gl.id)
LEFT JOIN chart c ON (ac.chart_id = c.id)
LEFT JOIN tax t ON (ac.tax_id = t.id)
LEFT JOIN chart tc ON (t.chart_id = tc.id)
WHERE (gl.id IS NOT NULL)
AND $fromto
$trans_id_filter
$filter

ORDER BY trans_id, acc_trans_id|;

my $sth = prepare_execute_query($form, $self->dbh, $query);
$self->{DATEV} = [];

my $counter = 0;
my $continue = 1; #
my $name;
while ( $continue && (my $ref = $sth->fetchrow_hashref("NAME_lc")) ) {
last unless $ref; # for single transactions
$counter++;
if (($counter % 500) == 0) {
$progress_callback->($counter);
}

my $trans = [ $ref ];

my $count = $ref->{amount};
my $firstrun = 1;

# if the amount of a booking in a group is smaller than 0.02, any tax
# amounts will likely be smaller than 1 cent, so go into subcent mode
my $subcent = abs($count) < 0.02;

# records from acc_trans are ordered by trans_id and acc_trans_id
# first check for unbalanced ledger inside one trans_id
# there may be several groups inside a trans_id, e.g. the original booking and the payment
# each group individually should be exactly balanced and each group
# individually needs its own datev lines

# keep fetching new acc_trans lines until the end of a balanced group is reached
while (abs($count) > 0.01 || $firstrun || ($subcent && abs($count) > 0.005)) {
my $ref2 = $sth->fetchrow_hashref("NAME_lc");
unless ( $ref2 ) {
$continue = 0;
last;
};

# check if trans_id of current acc_trans line is still the same as the
# trans_id of the first line in group, i.e. we haven't finished a 0-group
# before moving on to the next trans_id, error will likely be in the old
# trans_id.

if ($ref2->{trans_id} != $trans->[0]->{trans_id}) {
require SL::DB::Manager::AccTransaction;
if ( $trans->[0]->{trans_id} ) {
my $acc_trans_obj = SL::DB::Manager::AccTransaction->get_first(where => [ trans_id => $trans->[0]->{trans_id} ]);
$self->add_error(t8("Export error in transaction #1: Unbalanced ledger before next transaction (#2)",
$acc_trans_obj->transaction_name, $ref2->{trans_id})
);
};
return;
}

push @{ $trans }, $ref2;

$count += $ref2->{amount};
$firstrun = 0;
}

foreach my $i (0 .. scalar(@{ $trans }) - 1) {
my $ref = $trans->[$i];
my $prev_ref = 0 < $i ? $trans->[$i - 1] : undef;
if ( $all_taxchart_ids{$ref->{id}}
&& ($ref->{link} =~ m/(?:AP_tax|AR_tax)/)
&& ( ($prev_ref && $prev_ref->{taxkey} && (_sign($ref->{amount}) == _sign($prev_ref->{amount})))
|| $ref->{invoice})) {
$ref->{is_tax} = 1;
}

if ( !$ref->{invoice} # we have a non-invoice booking (=gl)
&& $ref->{is_tax} # that has "is_tax" set
&& !($prev_ref->{is_tax}) # previous line wasn't is_tax
&& (_sign($ref->{amount}) == _sign($prev_ref->{amount}))) { # and sign same as previous sign
$trans->[$i - 1]->{tax_amount} = $ref->{amount};
}
}

my $absumsatz = 0;
if (scalar(@{$trans}) <= 2) {
push @{ $self->{DATEV} }, $trans;
next;
}

# determine at which array position the reference value (called absumsatz) is
# and which amount it has

for my $j (0 .. (scalar(@{$trans}) - 1)) {

# Three cases:
# 1: gl transaction (Dialogbuchung), invoice is false, no double split booking allowed

# 2: sales or vendor invoice (Verkaufs- und Einkaufsrechnung): invoice is
# true, instead of absumsatz use link AR/AP (there should only be one
# entry)

# 3. AR/AP transaction (Kreditoren- und Debitorenbuchung): invoice is false,
# instead of absumsatz use link AR/AP (there should only be one, so jump
# out of search as soon as you find it )

# case 1 and 2
# for gl-bookings no split is allowed and there is no AR/AP account, so we always use the maximum value as a reference
# for ap/ar bookings we can always search for AR/AP in link and use that
if ( ( not $trans->[$j]->{'invoice'} and abs($trans->[$j]->{'amount'}) > abs($absumsatz) )
or ($trans->[$j]->{'invoice'} and ($trans->[$j]->{'link'} eq 'AR' or $trans->[$j]->{'link'} eq 'AP'))) {
$absumsatz = $trans->[$j]->{'amount'};
$notsplitindex = $j;
}

# case 3
# Problem: we can't distinguish between AR and AP and normal invoices via boolean "invoice"
# for AR and AP transaction exit the loop as soon as an AR or AP account is found
# there must be only one AR or AP chart in the booking
# since it is possible to do this kind of things with GL too, make sure those don't get aborted in case someone
# manually pays an invoice in GL.
if ($trans->[$j]->{table} ne 'gl' and ($trans->[$j]->{'link'} eq 'AR' or $trans->[$j]->{'link'} eq 'AP')) {
$notsplitindex = $j; # position in booking with highest amount
$absumsatz = $trans->[$j]->{'amount'};
last;
};
}

my $ml = ($trans->[0]->{'umsatz'} > 0) ? 1 : -1;
my $rounding_error = 0;
my @taxed;

# go through each line and determine if it is a tax booking or not
# skip all tax lines and notsplitindex line
# push all other accounts (e.g. income or expense) with corresponding taxkey

for my $j (0 .. (scalar(@{$trans}) - 1)) {
if ( ($j != $notsplitindex)
&& !$trans->[$j]->{is_tax}
&& ( $trans->[$j]->{'taxkey'} eq ""
|| $trans->[$j]->{'taxkey'} eq "0"
|| $trans->[$j]->{'taxkey'} eq "1"
|| $trans->[$j]->{'taxkey'} eq "10"
|| $trans->[$j]->{'taxkey'} eq "11")) {
my %new_trans = ();
map { $new_trans{$_} = $trans->[$notsplitindex]->{$_}; } keys %{ $trans->[$notsplitindex] };

$absumsatz += $trans->[$j]->{'amount'};
$new_trans{'amount'} = $trans->[$j]->{'amount'} * (-1);
$new_trans{'umsatz'} = abs($trans->[$j]->{'amount'}) * $ml;
$trans->[$j]->{'umsatz'} = abs($trans->[$j]->{'amount'}) * $ml;

push @{ $self->{DATEV} }, [ \%new_trans, $trans->[$j] ];

} elsif (($j != $notsplitindex) && !$trans->[$j]->{is_tax}) {

my %new_trans = ();
map { $new_trans{$_} = $trans->[$notsplitindex]->{$_}; } keys %{ $trans->[$notsplitindex] };

my $tax_rate = $trans->[$j]->{'taxrate'};
$new_trans{'net_amount'} = $trans->[$j]->{'amount'} * -1;
$new_trans{'tax_rate'} = 1 + $tax_rate;

if (!$trans->[$j]->{'invoice'}) {
$new_trans{'amount'} = $form->round_amount(-1 * ($trans->[$j]->{amount} + $trans->[$j]->{tax_amount}), 2);
$new_trans{'umsatz'} = abs($new_trans{'amount'}) * $ml;
$trans->[$j]->{'umsatz'} = $new_trans{'umsatz'};
$absumsatz += -1 * $new_trans{'amount'};

} else {
my $unrounded = $trans->[$j]->{'amount'} * (1 + $tax_rate) * -1 + $rounding_error;
my $rounded = $form->round_amount($unrounded, 2);

$rounding_error = $unrounded - $rounded;
$new_trans{'amount'} = $rounded;
$new_trans{'umsatz'} = abs($rounded) * $ml;
$trans->[$j]->{'umsatz'} = $new_trans{umsatz};
$absumsatz -= $rounded;
}

push @{ $self->{DATEV} }, [ \%new_trans, $trans->[$j] ];
push @taxed, $self->{DATEV}->[-1];
}
}

my $idx = 0;
my $correction = 0;
while ((abs($absumsatz) >= 0.01) && (abs($absumsatz) < 1.00)) {
if ($idx >= scalar @taxed) {
last if (!$correction);

$correction = 0;
$idx = 0;
}

my $transaction = $taxed[$idx]->[0];

my $old_amount = $transaction->{amount};
my $old_correction = $correction;
my @possible_diffs;

if (!$transaction->{diff}) {
@possible_diffs = (0.01, -0.01);
} else {
@possible_diffs = ($transaction->{diff});
}

foreach my $diff (@possible_diffs) {
my $net_amount = $form->round_amount(($transaction->{amount} + $diff) / $transaction->{tax_rate}, 2);
next if ($net_amount != $transaction->{net_amount});

$transaction->{diff} = $diff;
$transaction->{amount} += $diff;
$transaction->{umsatz} += $diff;
$absumsatz -= $diff;
$correction = 1;

last;
}

$idx++;
}

$absumsatz = $form->round_amount($absumsatz, 2);
if (abs($absumsatz) >= (0.01 * (1 + scalar @taxed))) {
require SL::DB::Manager::AccTransaction;
my $acc_trans_obj = SL::DB::Manager::AccTransaction->get_first(where => [ trans_id => $trans->[0]->{trans_id} ]);
$self->add_error(t8("Export error in transaction #1: Rounding error too large #2",
$acc_trans_obj->transaction_name, $absumsatz)
);
} elsif (abs($absumsatz) >= 0.01) {
$self->add_net_gross_differences($absumsatz);
}
}

$sth->finish();

$::lxdebug->leave_sub;
}

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

my ($self, $form) = @_;
my ($primanota);

my $stamm = $self->get_datev_stamm;

my $jahr = $self->from ? $self->from->year : DateTime->today->year;

#Header
my $header = "\x1D\x181";
$header .= _fill($stamm->{datentraegernr}, 3, ' ', 'left');
$header .= ($self->fromto) ? "11" : "13"; # Anwendungsnummer
$header .= _fill($stamm->{dfvkz}, 2, '0');
$header .= _fill($stamm->{beraternr}, 7, '0');
$header .= _fill($stamm->{mandantennr}, 5, '0');
$header .= _fill(($stamm->{abrechnungsnr} // '') . $jahr, 6, '0');

$header .= $self->from ? $self->from->strftime('%d%m%y') : '';
$header .= $self->to ? $self->to->strftime('%d%m%y') : '';

if ($self->fromto) {
$primanota = "001";
$header .= $primanota;
}

$header .= _fill($stamm->{passwort}, 4, '0');
$header .= " " x 16; # Anwendungsinfo
$header .= " " x 16; # Inputinfo
$header .= "\x79";

#Versionssatz
my $versionssatz = $self->exporttype == DATEV_ET_BUCHUNGEN ? "\xB5" . "1," : "\xB6" . "1,";

my $query = qq|SELECT accno FROM chart LIMIT 1|;
my $ref = selectfirst_hashref_query($form, $self->dbh, $query);

$versionssatz .= length $ref->{accno};
$versionssatz .= ",";
$versionssatz .= length $ref->{accno};
$versionssatz .= ",SELF" . "\x1C\x79";

$header .= $versionssatz;

$main::lxdebug->leave_sub();

return $header;
}

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

my ($date, $six) = @_;

my ($day, $month, $year) = split(/\./, $date);

if ($day =~ /^0/) {
$day = substr($day, 1, 1);
}
if (length($month) < 2) {
$month = "0" . $month;
}
if (length($year) > 2) {
$year = substr($year, -2, 2);
}

if ($six) {
$date = $day . $month . $year;
} else {
$date = $day . $month;
}

$main::lxdebug->leave_sub();

return $date;
}

sub trim_leading_zeroes {
my $str = shift;

$str =~ s/^0+//g;

return $str;
}

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

my ($self, $header, $filename, $blockcount) = @_;

my $versionset = "V" . substr($filename, 2, 5);
$versionset .= substr($header, 6, 22);

if ($self->fromto) {
$versionset .= "0000" . substr($header, 28, 19);
} else {
my $datum = " " x 16;
$versionset .= $datum . "001" . substr($header, 28, 4);
}

$versionset .= _fill($blockcount, 5, '0');
$versionset .= "001";
$versionset .= " 1";
$versionset .= substr($header, -12, 10) . " ";
$versionset .= " " x 53;

$main::lxdebug->leave_sub();

return $versionset;
}

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

my ($self, $form, $fileno) = @_;

my $stamm = $self->get_datev_stamm;

my $ev_header = _fill($stamm->{datentraegernr}, 3, ' ', 'left');
$ev_header .= " ";
$ev_header .= _fill($stamm->{beraternr}, 7, ' ', 'left');
$ev_header .= _fill($stamm->{beratername}, 9, ' ', 'left');
$ev_header .= " ";
$ev_header .= (_fill($fileno, 5, '0')) x 2;
$ev_header .= " " x 95;

$main::lxdebug->leave_sub();

return $ev_header;
}

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

my ($self) = @_;

my $form = $::form;

my @filenames;

my $filename = "ED00000";
my $evfile = "EV01";
my @ed_versionset;
my $fileno = 0;

my $fromto = $self->fromto;

$self->_get_transactions(from_to => $fromto);

return if $self->errors;

my $counter = 0;

while (scalar(@{ $self->{DATEV} || [] })) {
my $umsatzsumme = 0;
$filename++;
my $ed_filename = $self->export_path . $filename;
push(@filenames, $filename);
my $header = $self->make_kne_data_header($form);

my $kne_file = SL::DATEV::KNEFile->new();
$kne_file->add_block($header);

while (scalar(@{ $self->{DATEV} }) > 0) {
my $transaction = shift @{ $self->{DATEV} };
my $trans_lines = scalar(@{$transaction});
$counter++;

my $umsatz = 0;
my $gegenkonto = "";
my $konto = "";
my $belegfeld1 = "";
my $datum = "";
my $waehrung = "";
my $buchungstext = "";
my $belegfeld2 = "";
my $datevautomatik = 0;
my $taxkey = 0;
my $charttax = 0;
my $ustid ="";
my ($haben, $soll);
my $iconv = $::locale->{iconv_utf8};
my %umlaute = ($iconv->convert('ä') => 'ae',
$iconv->convert('ö') => 'oe',
$iconv->convert('ü') => 'ue',
$iconv->convert('Ä') => 'Ae',
$iconv->convert('Ö') => 'Oe',
$iconv->convert('Ü') => 'Ue',
$iconv->convert('ß') => 'sz');
for (my $i = 0; $i < $trans_lines; $i++) {
if ($trans_lines == 2) {
if (abs($transaction->[$i]->{'amount'}) > abs($umsatz)) {
$umsatz = $transaction->[$i]->{'amount'};
}
} else {
if (abs($transaction->[$i]->{'umsatz'}) > abs($umsatz)) {
$umsatz = $transaction->[$i]->{'umsatz'};
}
}
if ($transaction->[$i]->{'datevautomatik'}) {
$datevautomatik = 1;
}
if ($transaction->[$i]->{'taxkey'}) {
$taxkey = $transaction->[$i]->{'taxkey'};
}
if ($transaction->[$i]->{'charttax'}) {
$charttax = $transaction->[$i]->{'charttax'};
}
if ($transaction->[$i]->{'amount'} > 0) {
$haben = $i;
} else {
$soll = $i;
}
}
# Umwandlung von Umlauten und Sonderzeichen in erlaubte Zeichen bei Textfeldern
foreach my $umlaut (keys(%umlaute)) {
$transaction->[$haben]->{'invnumber'} =~ s/${umlaut}/${umlaute{$umlaut}}/g;
$transaction->[$haben]->{'name'} =~ s/${umlaut}/${umlaute{$umlaut}}/g;
}

$transaction->[$haben]->{'invnumber'} =~ s/[^0-9A-Za-z\$\%\&\*\+\-\/]//g;
$transaction->[$haben]->{'name'} =~ s/[^0-9A-Za-z\$\%\&\*\+\-\ \/]//g;

$transaction->[$haben]->{'invnumber'} = substr($transaction->[$haben]->{'invnumber'}, 0, 12);
$transaction->[$haben]->{'name'} = substr($transaction->[$haben]->{'name'}, 0, 30);
$transaction->[$haben]->{'invnumber'} =~ s/\ *$//;
$transaction->[$haben]->{'name'} =~ s/\ *$//;

if ($trans_lines >= 2) {

$gegenkonto = "a" . trim_leading_zeroes($transaction->[$haben]->{'accno'});
$konto = "e" . trim_leading_zeroes($transaction->[$soll]->{'accno'});
if ($transaction->[$haben]->{'invnumber'} ne "") {
$belegfeld1 = "\xBD" . $transaction->[$haben]->{'invnumber'} . "\x1C";
}
$datum = "d";
$datum .= &datetofour($transaction->[$haben]->{'transdate'}, 0);
$waehrung = "\xB3" . "EUR" . "\x1C";
if ($transaction->[$haben]->{'name'} ne "") {
$buchungstext = "\x1E" . $transaction->[$haben]->{'name'} . "\x1C";
}
if (($transaction->[$haben]->{'ustid'} // '') ne "") {
$ustid = "\xBA" . $transaction->[$haben]->{'ustid'} . "\x1C";
}
if (($transaction->[$haben]->{'duedate'} // '') ne "") {
$belegfeld2 = "\xBE" . &datetofour($transaction->[$haben]->{'duedate'}, 1) . "\x1C";
}
}

$umsatz = $kne_file->format_amount(abs($umsatz), 0);
$umsatzsumme += $umsatz;
$kne_file->add_block("+" . $umsatz);

# Dies ist die einzige Stelle die datevautomatik auswertet. Was soll gesagt werden?
# Im Prinzip hat jeder acc_trans Eintrag einen Steuerschlüssel, außer, bei gewissen Fällen
# wie: Kreditorenbuchung mit negativen Vorzeichen, SEPA-Export oder Rechnungen die per
# Skript angelegt werden.
# Also falls ein Steuerschlüssel da ist und NICHT datevautomatik diesen Block hinzufügen.
# Oder aber datevautomatik ist WAHR, aber der Steuerschlüssel in der acc_trans weicht
# von dem in der Chart ab: Also wahrscheinlich Programmfehler (NULL übergeben, statt
# DATEV-Steuerschlüssel) oder der Steuerschlüssel des Kontos weicht WIRKLICH von dem Eintrag in der
# acc_trans ab. Gibt es für diesen Fall eine plausiblen Grund?
#
if ( ( $datevautomatik || $taxkey)
&& (!$datevautomatik || ($datevautomatik && ($charttax ne $taxkey)))) {
# $kne_file->add_block("\x6C" . (!$datevautomatik ? $taxkey : "4"));
$kne_file->add_block("\x6C${taxkey}");
}

$kne_file->add_block($gegenkonto);
$kne_file->add_block($belegfeld1);
$kne_file->add_block($belegfeld2);
$kne_file->add_block($datum);
$kne_file->add_block($konto);
$kne_file->add_block($buchungstext);
$kne_file->add_block($ustid);
$kne_file->add_block($waehrung . "\x79");
}

my $mandantenendsumme = "x" . $kne_file->format_amount($umsatzsumme / 100.0, 14) . "\x79\x7a";

$kne_file->add_block($mandantenendsumme);
$kne_file->flush();

open(ED, ">", $ed_filename) or die "can't open outputfile: $!\n";
print(ED $kne_file->get_data());
close(ED);

$ed_versionset[$fileno] = $self->make_ed_versionset($header, $filename, $kne_file->get_block_count());
$fileno++;
}

#Make EV Verwaltungsdatei
my $ev_header = $self->make_ev_header($form, $fileno);
my $ev_filename = $self->export_path . $evfile;
push(@filenames, $evfile);
open(EV, ">", $ev_filename) or die "can't open outputfile: EV01\n";
print(EV $ev_header);

foreach my $file (@ed_versionset) {
print(EV $file);
}
close(EV);
###

$self->add_filenames(@filenames);

$main::lxdebug->leave_sub();

return { 'download_token' => $self->download_token, 'filenames' => \@filenames };
}

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

my ($self) = @_;
my $form = $::form;

$self->get_datev_stamm->{abrechnungsnr} = "99";

my @filenames;

my $filename = "ED00000";
my $evfile = "EV01";
my @ed_versionset;
my $fileno = 1;
my $i = 0;
my $blockcount = 1;
my $remaining_bytes = 256;
my $total_bytes = 256;
my $buchungssatz = "";
$filename++;
my $ed_filename = $self->export_path . $filename;
push(@filenames, $filename);
open(ED, ">", $ed_filename) or die "can't open outputfile: $!\n";
my $header = $self->make_kne_data_header($form);
$remaining_bytes -= length($header);

my $fuellzeichen;

my (@where, @values) = ((), ());
if ($self->accnofrom) {
push @where, 'c.accno >= ?';
push @values, $self->accnofrom;
}
if ($self->accnoto) {
push @where, 'c.accno <= ?';
push @values, $self->accnoto;
}

my $where_str = @where ? ' WHERE ' . join(' AND ', map { "($_)" } @where) : '';

my $query = qq|SELECT c.accno, c.description
FROM chart c
$where_str
ORDER BY c.accno|;

my $sth = $self->dbh->prepare($query);
$sth->execute(@values) || $form->dberror($query);

while (my $ref = $sth->fetchrow_hashref("NAME_lc")) {
if (($remaining_bytes - length("t" . $ref->{'accno'})) <= 6) {
$fuellzeichen = ($blockcount * 256 - length($buchungssatz . $header));
$buchungssatz .= "\x00" x $fuellzeichen;
$blockcount++;
$total_bytes = ($blockcount) * 256;
}
$buchungssatz .= "t" . $ref->{'accno'};
$remaining_bytes = $total_bytes - length($buchungssatz . $header);
$ref->{'description'} =~ s/[^0-9A-Za-z\$\%\&\*\+\-\/]//g;
$ref->{'description'} = substr($ref->{'description'}, 0, 40);
$ref->{'description'} =~ s/\ *$//;

if (
($remaining_bytes - length("\x1E" . $ref->{'description'} . "\x1C\x79")
) <= 6
) {
$fuellzeichen = ($blockcount * 256 - length($buchungssatz . $header));
$buchungssatz .= "\x00" x $fuellzeichen;
$blockcount++;
$total_bytes = ($blockcount) * 256;
}
$buchungssatz .= "\x1E" . $ref->{'description'} . "\x1C\x79";
$remaining_bytes = $total_bytes - length($buchungssatz . $header);
}

$sth->finish;
print(ED $header);
print(ED $buchungssatz);
$fuellzeichen = 256 - (length($header . $buchungssatz . "z") % 256);
my $dateiende = "\x00" x $fuellzeichen;
print(ED "z");
print(ED $dateiende);
close(ED);

#Make EV Verwaltungsdatei
$ed_versionset[0] =
$self->make_ed_versionset($header, $filename, $blockcount);

my $ev_header = $self->make_ev_header($form, $fileno);
my $ev_filename = $self->export_path . $evfile;
push(@filenames, $evfile);
open(EV, ">", $ev_filename) or die "can't open outputfile: EV01\n";
print(EV $ev_header);

foreach my $file (@ed_versionset) {
print(EV $ed_versionset[$file]);
}
close(EV);

$self->add_filenames(@filenames);

$main::lxdebug->leave_sub();

return { 'download_token' => $self->download_token, 'filenames' => \@filenames };
}

sub _format_accno {
my ($accno) = @_;
return $accno . ('0' x (6 - min(length($accno), 6)));
}

sub csv_export_for_tax_accountant {
my ($self) = @_;

$self->_get_transactions(from_to => $self->fromto);

foreach my $transaction (@{ $self->{DATEV} }) {
foreach my $entry (@{ $transaction }) {
$entry->{sortkey} = join '-', map { lc } (DateTime->from_kivitendo($entry->{transdate})->strftime('%Y%m%d'), $entry->{name}, $entry->{reference});
}
}

my %transactions =
partition_by { $_->[0]->{table} }
sort_by { $_->[0]->{sortkey} }
grep { 2 == scalar(@{ $_ }) }
@{ $self->{DATEV} };

my %column_defs = (
acc_trans_id => { 'text' => $::locale->text('ID'), },
amount => { 'text' => $::locale->text('Amount'), },
credit_accname => { 'text' => $::locale->text('Credit Account Name'), },
credit_accno => { 'text' => $::locale->text('Credit Account'), },
debit_accname => { 'text' => $::locale->text('Debit Account Name'), },
debit_accno => { 'text' => $::locale->text('Debit Account'), },
invnumber => { 'text' => $::locale->text('Reference'), },
name => { 'text' => $::locale->text('Name'), },
notes => { 'text' => $::locale->text('Notes'), },
tax => { 'text' => $::locale->text('Tax'), },
taxkey => { 'text' => $::locale->text('Taxkey'), },
tax_accname => { 'text' => $::locale->text('Tax Account Name'), },
tax_accno => { 'text' => $::locale->text('Tax Account'), },
transdate => { 'text' => $::locale->text('Invoice Date'), },
vcnumber => { 'text' => $::locale->text('Customer/Vendor Number'), },
);

my @columns = qw(
acc_trans_id name vcnumber
transdate invnumber amount
debit_accno debit_accname
credit_accno credit_accname
tax
tax_accno tax_accname taxkey
notes
);

my %filenames_by_type = (
ar => $::locale->text('AR Transactions'),
ap => $::locale->text('AP Transactions'),
gl => $::locale->text('GL Transactions'),
);

my @filenames;
foreach my $type (qw(ap ar)) {
my %csvs = (
invoices => {
content => '',
filename => sprintf('%s %s - %s.csv', $filenames_by_type{$type}, $self->from->to_kivitendo, $self->to->to_kivitendo),
csv => Text::CSV_XS->new({
binary => 1,
eol => "\n",
sep_char => ";",
}),
},
payments => {
content => '',
filename => sprintf('Zahlungen %s %s - %s.csv', $filenames_by_type{$type}, $self->from->to_kivitendo, $self->to->to_kivitendo),
csv => Text::CSV_XS->new({
binary => 1,
eol => "\n",
sep_char => ";",
}),
},
);

foreach my $csv (values %csvs) {
$csv->{out} = IO::File->new($self->export_path . '/' . $csv->{filename}, '>:encoding(utf8)') ;
$csv->{csv}->print($csv->{out}, [ map { $column_defs{$_}->{text} } @columns ]);

push @filenames, $csv->{filename};
}

foreach my $transaction (@{ $transactions{$type} }) {
my $is_payment = any { $_->{link} =~ m{A[PR]_paid} } @{ $transaction };
my $csv = $is_payment ? $csvs{payments} : $csvs{invoices};

my ($soll, $haben) = map { $transaction->[$_] } ($transaction->[0]->{amount} > 0 ? (1, 0) : (0, 1));
my $tax = defined($soll->{tax_accno}) ? $soll : $haben;
my $amount = defined($soll->{net_amount}) ? $soll : $haben;
$haben->{notes} = ($haben->{memo} || $soll->{memo}) if $is_payment;
$haben->{notes} //= '';
$haben->{notes} = SL::HTML::Util->strip($haben->{notes});
$haben->{notes} =~ s{\r}{}g;
$haben->{notes} =~ s{\n+}{ }g;

my %row = (
amount => $::form->format_amount({ numberformat => '1000,00' }, abs($amount->{amount}), 2),
debit_accno => _format_accno($soll->{accno}),
debit_accname => $soll->{accname},
credit_accno => _format_accno($haben->{accno}),
credit_accname => $haben->{accname},
tax => $::form->format_amount({ numberformat => '1000,00' }, abs($amount->{amount}) - abs($amount->{net_amount}), 2),
notes => $haben->{notes},
(map { ($_ => $tax->{$_}) } qw(taxkey tax_accname tax_accno)),
(map { ($_ => ($haben->{$_} // $soll->{$_})) } qw(acc_trans_id invnumber name vcnumber transdate)),
);

$csv->{csv}->print($csv->{out}, [ map { $row{$_} } @columns ]);
}

$_->{out}->close for values %csvs;
}

$self->add_filenames(@filenames);

return { download_token => $self->download_token, filenames => \@filenames };
}

sub DESTROY {
clean_temporary_directories();
}

1;

__END__

=encoding utf-8

=head1 NAME

SL::DATEV - kivitendo DATEV Export module

=head1 SYNOPSIS

use SL::DATEV qw(:CONSTANTS);

my $startdate = DateTime->new(year => 2014, month => 9, day => 1);
my $enddate = DateTime->new(year => 2014, month => 9, day => 31);
my $datev = SL::DATEV->new(
exporttype => DATEV_ET_BUCHUNGEN,
format => DATEV_FORMAT_KNE,
from => $startdate,
to => $enddate,
);

# To only export transactions from a specific trans_id: (from and to are ignored)
my $invoice = SL::DB::Manager::Invoice->find_by( invnumber => '216' );
my $datev = SL::DATEV->new(
exporttype => DATEV_ET_BUCHUNGEN,
format => DATEV_FORMAT_KNE,
trans_id => $invoice->trans_id,
);

my $datev = SL::DATEV->new(
exporttype => DATEV_ET_STAMM,
format => DATEV_FORMAT_KNE,
accnofrom => $start_account_number,
accnoto => $end_account_number,
);

# get or set datev stamm
my $hashref = $datev->get_datev_stamm;
$datev->save_datev_stamm($hashref);

# manually clean up temporary directories older than 8 hours
$datev->clean_temporary_directories;

# export
$datev->export;

if ($datev->errors) {
die join "\n", $datev->error;
}

# get relevant data for saving the export:
my $dl_token = $datev->download_token;
my $path = $datev->export_path;
my @files = $datev->filenames;

# retrieving an export at a later time
my $datev = SL::DATEV->new(
download_token => $dl_token_from_user,
);

my $path = $datev->export_path;
my @files = glob("$path/*");

=head1 DESCRIPTION

This module implements the DATEV export standard. For usage see above.

=head1 FUNCTIONS

=over 4

=item new PARAMS

Generic constructor. See section attributes for information about what to pass.

=item get_datev_stamm

Loads DATEV Stammdaten and returns as hashref.

=item save_datev_stamm HASHREF

Saves DATEV Stammdaten from provided hashref.

=item exporttype

See L<CONSTANTS> for possible values

=item has_exporttype

Returns true if an exporttype has been set. Without exporttype most report functions won't work.

=item format

Specifies the designated format of the export. Currently only KNE export is implemented.

See L<CONSTANTS> for possible values

=item has_format

Returns true if a format has been set. Without format most report functions won't work.

=item download_token

Returns a download token for this DATEV object.

Note: If either a download_token or export_path were set at the creation these are infered, otherwise randomly generated.

=item export_path

Returns an export_path for this DATEV object.

Note: If either a download_token or export_path were set at the creation these are infered, otherwise randomly generated.

=item filenames

Returns a list of filenames generated by this DATEV object. This only works if the files were generated during its lifetime, not if the object was created from a download_token.

=item net_gross_differences

If there were any net gross differences during calculation they will be collected here.

=item sum_net_gross_differences

Sum of all differences.

=item clean_temporary_directories

Forces a garbage collection on previous exports which will delete all exports that are older than 8 hours. It will be automatically called on destruction of the object, but is advised to be called manually before delivering results of an export to the user.

=item errors

Returns a list of errors that occured. If no errors occured, the export was a success.

=item export

Exports data. You have to have set L<exporttype> and L<format> or an error will
occur. OBE exports are currently not implemented.

=back

=head1 ATTRIBUTES

This is a list of attributes set in either the C<new> or a method of the same name.

=over 4

=item dbh

Set a database handle to use in the process. This allows for an export to be
done on a transaction in progress without committing first.

Note: If you don't want this code to commit, simply providing a dbh is not
enough enymore. You'll have to wrap the call into a transaction yourself, so
that the internal transaction does not commit.

=item exporttype

See L<CONSTANTS> for possible values. This MUST be set before export is called.

=item format

See L<CONSTANTS> for possible values. This MUST be set before export is called.

=item download_token

Can be set on creation to retrieve a prior export for download.

=item from

=item to

Set boundary dates for the export. Unless a trans_id is passed these MUST be
set for the export to work.

=item trans_id

To check only one gl/ar/ap transaction, pass the trans_id. The attributes
L<from> and L<to> are currently still needed for the query to be assembled
correctly.

=item accnofrom

=item accnoto

Set boundary account numbers for the export. Only useful for a stammdaten export.

=back

=head1 CONSTANTS

=head2 Supplied to L<exporttype>

=over 4

=item DATEV_ET_BUCHUNGEN

=item DATEV_ET_STAMM

=back

=head2 Supplied to L<format>.

=over 4

=item DATEV_FORMAT_KNE

=item DATEV_FORMAT_OBE

=back

=head1 ERROR HANDLING

This module will die in the following cases:

=over 4

=item *

No or unrecognized exporttype or format was provided for an export

=item *

OBE export was called, which is not yet implemented.

=item *

general I/O errors

=back

Errors that occur during th actual export will be collected in L<errors>. The following types can occur at the moment:

=over 4

=item *

C<Unbalanced Ledger!>. Exactly that, your ledger is unbalanced. Should never occur.

=item *

C<Datev-Export fehlgeschlagen! Bei Transaktion %d (%f).> This error occurs if a
transaction could not be reliably sorted out, or had rounding errors above the acceptable threshold.

=back

=head1 BUGS AND CAVEATS

=over 4

=item *

Handling of Vollvorlauf is currently not fully implemented. You must provide both from and to in order to get a working export.

=item *

OBE export is currently not implemented.

=back

=head1 TODO

- handling of export_path and download token is a bit dodgy, clean that up.

=head1 SEE ALSO

L<SL::DATEV::KNEFile>

=head1 AUTHORS

Philip Reetz E<lt>p.reetz@linet-services.deE<gt>,

Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>,

Jan Büren E<lt>jan@lx-office-hosting.deE<gt>,

Geoffrey Richardson E<lt>information@lx-office-hosting.deE<gt>,

Sven Schöling E<lt>s.schoeling@linet-services.deE<gt>,

Stephan Köhler

=cut
(19-19/77)