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kivitendo/SL/XMLInvoice/CrossIndustryInvoice.pm @ 7b1da9c3

335b5ab6 Johannes Grassler
package SL::XMLInvoice::CrossIndustryInvoice;
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use strict;
use warnings;

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use parent qw(SL::XMLInvoice::Base);
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use constant ITEMS_XPATH => '//ram:IncludedSupplyChainTradeLineItem';

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=head1 NAME

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SL::XMLInvoice::CrossIndustryInvoice - XML parser for UN/CEFACT Cross Industry Invoice
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=head1 DESCRIPTION

C<SL::XMLInvoice::CrossIndustryInvoice> parses XML invoices in UN/CEFACT Cross
Industry Invoice format and makes their data available through the interface
defined by C<SL::XMLInvoice>. Refer to L<SL::XMLInvoice> for a detailed
description of that interface.

See L<https://unece.org/trade/uncefact/xml-schemas> for that format's
specification.

=head1 OPERATION

This module is fairly simple. It keeps two hashes of XPath statements exposed
by methods:

=over 4

=item scalar_xpaths()

This hash is keyed by the keywords C<data_keys> mandates. Values are XPath
statements specifying the location of this field in the invoice XML document.

=item item_xpaths()

This hash is keyed by the keywords C<item_keys> mandates. Values are XPath
statements specifying the location of this field inside a line item.

=back

When invoked by the C<SL::XMLInvoice> constructor, C<parse_xml()> will first
use the XPath statements from the C<scalar_xpaths()> hash to populate the hash
returned by the C<metadata()> method.

After that, it will use the XPath statements from the C<scalar_xpaths()> hash
to iterate over the invoice's line items and populate the array of hashes
returned by the C<items()> method.

=head1 AUTHOR

Johannes Grassler <info@computer-grassler.de>

=cut

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sub supported {
my @supported = ( "UN/CEFACT Cross Industry Invoice (urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100)" );
return @supported;
}

sub check_signature {
my ($self, $dom) = @_;

my $rootnode = $dom->documentElement;

foreach my $attr ( $rootnode->attributes ) {
if ( $attr->getData =~ m/urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100/ ) {
return 1;
}
}

return 0;
}

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# XML XPath expressions for global metadata
sub scalar_xpaths {
return {
currency => '//ram:InvoiceCurrencyCode',
direct_debit => '//ram:SpecifiedTradeSettlementPaymentMeans/ram:TypeCode',
duedate => '//ram:DueDateDateTime/udt:DateTimeString',
gross_total => '//ram:DuePayableAmount',
iban => '//ram:SpecifiedTradeSettlementPaymentMeans/ram:PayeePartyCreditorFinancialAccount/ram:IBANID',
invnumber => '//rsm:ExchangedDocument/ram:ID',
net_total => '//ram:SpecifiedTradeSettlementHeaderMonetarySummation' . '//ram:TaxBasisTotalAmount',
transdate => '//ram:IssueDateTime/udt:DateTimeString',
taxnumber => '//ram:SellerTradeParty/ram:SpecifiedTaxRegistration/ram:ID[@schemeID="FC"]',
type => '//rsm:ExchangedDocument/ram:TypeCode',
ustid => '//ram:SellerTradeParty/ram:SpecifiedTaxRegistration/ram:ID[@schemeID="VA"]',
vendor_name => '//ram:SellerTradeParty/ram:Name',
};
}

sub item_xpaths {
return {
'currency' => undef, # Only global currency in CrossIndustryInvoice
'price' => './ram:SpecifiedLineTradeAgreement/ram:NetPriceProductTradePrice',
'description' => './ram:SpecifiedTradeProduct/ram:Name',
'quantity' => './ram:SpecifiedLineTradeDelivery/ram:BilledQuantity',
'subtotal' => './ram:SpecifiedLineTradeSettlement/ram:SpecifiedTradeSettlementLineMonetarySummation/ram:LineTotalAmount',
'tax_rate' => './ram:SpecifiedLineTradeSettlement/ram:ApplicableTradeTax/ram:RateApplicablePercent',
'tax_scheme' => './ram:SpecifiedLineTradeSettlement/ram:ApplicableTradeTax/ram:TypeCode',
'vendor_partno' => './ram:SpecifiedTradeProduct/ram:SellerAssignedID',
};
}


# Metadata accessor method
sub metadata {
my $self = shift;
return $self->{_metadata};
}

# Item list accessor method
sub items {
my $self = shift;
return $self->{_items};
}

# Data keys we return
sub _data_keys {
my $self = shift;
my %keys;

map { $keys{$_} = 1; } keys %{$self->scalar_xpaths};

return \%keys;
}

# Item keys we return
sub _item_keys {
my $self = shift;
my %keys;

map { $keys{$_} = 1; } keys %{$self->item_xpaths};

return \%keys;
}

# Main parser subroutine for retrieving XML data
sub parse_xml {
my $self = shift;
$self->{_metadata} = {};
$self->{_items} = ();

# Retrieve scalar metadata from DOM
foreach my $key ( keys %{$self->scalar_xpaths} ) {
my $xpath = ${$self->scalar_xpaths}{$key};
unless ( $xpath ) {
# Skip keys without xpath expression
${$self->{_metadata}}{$key} = undef;
next;
}
my $value = $self->{dom}->findnodes($xpath);
if ( $value ) {
# Get rid of extraneous white space
$value = $value->string_value;
$value =~ s/\n|\r//g;
$value =~ s/\s{2,}/ /g;
${$self->{_metadata}}{$key} = $value;
} else {
${$self->{_metadata}}{$key} = undef;
}
}


# Convert payment code metadata field to Boolean
# See https://service.unece.org/trade/untdid/d16b/tred/tred4461.htm for other valid codes.
${$self->{_metadata}}{'direct_debit'} = ${$self->{_metadata}}{'direct_debit'} == 59 ? 1 : 0;

my @items;
$self->{_items} = \@items;

foreach my $item ( $self->{dom}->findnodes(ITEMS_XPATH) ) {
my %line_item;
foreach my $key ( keys %{$self->item_xpaths} ) {
my $xpath = ${$self->item_xpaths}{$key};
unless ( $xpath ) {
# Skip keys without xpath expression
$line_item{$key} = undef;
next;
}
my $value = $item->findnodes($xpath);
if ( $value ) {
# Get rid of extraneous white space
$value = $value->string_value;
$value =~ s/\n|\r//g;
$value =~ s/\s{2,}/ /g;
$line_item{$key} = $value;
} else {
$line_item{$key} = undef;
}
}
push @items, \%line_item;
}

}

1;