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# @tag: convert_taxzone
# @description: Setzt Fremdschlüssel und andere constraints auf die Tabellen tax und taxkeys
# @depends: taxzone_charts
package SL::DBUpgrade2::convert_taxzone;

use strict;
use utf8;

use parent qw(SL::DBUpgrade2::Base);

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

# extract all buchungsgruppen data
my $buchungsgruppen_query = <<SQL;
SELECT * from buchungsgruppen;
SQL

my $sth = $self->dbh->prepare($buchungsgruppen_query);
$sth->execute || $::form->dberror($buchungsgruppen_query);

$::form->{buchungsgruppen} = [];
while (my $ref = $sth->fetchrow_hashref("NAME_lc")) {
push @{ $::form->{buchungsgruppen} }, $ref;
}
$sth->finish;

# extract all tax_zone data
my $taxzone_query = <<SQL;
SELECT * from tax_zones;
SQL

$sth = $self->dbh->prepare($taxzone_query);
$sth->execute || $::form->dberror($taxzone_query);

$::form->{taxzones} = [];
while (my $ref = $sth->fetchrow_hashref("NAME_lc")) {
push @{ $::form->{taxzones} }, $ref;
}
$sth->finish;

my $taxzone_charts_update_query = "INSERT INTO taxzone_charts (taxzone_id, buchungsgruppen_id, income_accno_id, expense_accno_id) VALUES (?, ?, ?, ?)";
$sth = $self->dbh->prepare($taxzone_charts_update_query);

# convert Buchungsgruppen to taxzone_charts if any exist
# the default swiss COA doesn't have any, for example
if ( scalar @{ $::form->{buchungsgruppen} } > 0 ) {
foreach my $taxzone ( @{$::form->{taxzones}} ) {
foreach my $buchungsgruppe ( @{$::form->{buchungsgruppen}} ) {
my $id = $taxzone->{id};
my $income_accno_id = $buchungsgruppe->{"income_accno_id_$id"};
my $expense_accno_id = $buchungsgruppe->{"expense_accno_id_$id"};
my @values = ($taxzone->{id}, $buchungsgruppe->{id}, $income_accno_id, $expense_accno_id);
$sth->execute(@values) && next;
$taxzone_charts_update_query =~ s{\?}{shift(@values)}eg;
$::form->dberror($taxzone_charts_update_query);
};
};
};

$sth->finish;

my $clean_buchungsgruppen_query = <<SQL;
alter table buchungsgruppen drop column income_accno_id_0;
alter table buchungsgruppen drop column income_accno_id_1;
alter table buchungsgruppen drop column income_accno_id_2;
alter table buchungsgruppen drop column income_accno_id_3;
alter table buchungsgruppen drop column expense_accno_id_0;
alter table buchungsgruppen drop column expense_accno_id_1;
alter table buchungsgruppen drop column expense_accno_id_2;
alter table buchungsgruppen drop column expense_accno_id_3;
SQL
$sth = $self->dbh->prepare($clean_buchungsgruppen_query);
$sth->execute || $::form->dberror($clean_buchungsgruppen_query);
return 1;
} # end run

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