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package Koha::OAI::Client::Record; |
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# Copyright 2016 Prosentient Systems |
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# |
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# This file is part of Koha. |
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# |
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# Koha is free software; you can redistribute it and/or modify it |
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# under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# Koha is distributed in the hope that it will be useful, but |
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# WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with Koha; if not, see <http://www.gnu.org/licenses>. |
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# |
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|
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use Modern::Perl; |
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use XML::LibXML; |
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use XML::LibXSLT; |
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use MARC::Record; |
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use URI; |
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use File::Basename; |
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|
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use C4::Context; |
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use C4::Biblio; |
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use C4::ImportBatch; |
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use C4::Matcher; |
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|
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use constant MAX_MATCHES => 99999; #NOTE: This is an arbitrary value. We want to get all matches. |
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|
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sub new { |
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my ($class, $args) = @_; |
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$args = {} unless defined $args; |
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if (my $inxml = $args->{xml_string}){ |
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|
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#Parse the XML string into a XML::LibXML object |
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my $doc = XML::LibXML->load_xml(string => $inxml, { no_blanks => 1 }); |
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#NOTE: Don't load blank nodes |
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$args->{doc} = $doc; |
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|
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#Get the root element |
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my $root = $doc->documentElement; |
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|
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#Register namespaces for searching purposes |
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my $xpc = XML::LibXML::XPathContext->new(); |
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$xpc->registerNs('oai','http://www.openarchives.org/OAI/2.0/'); |
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|
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my $xpath_identifier = XML::LibXML::XPathExpression->new("oai:header/oai:identifier"); |
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my $identifier = $xpc->findnodes($xpath_identifier,$root)->shift; |
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$args->{header_identifier} = $identifier->textContent; |
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|
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my $xpath_datestamp = XML::LibXML::XPathExpression->new("oai:header/oai:datestamp"); |
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my $datestamp = $xpc->findnodes($xpath_datestamp,$root)->shift; |
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$args->{header_datestamp} = $datestamp->textContent; |
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|
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my $xpath_status = XML::LibXML::XPathExpression->new(q{oai:header/@status}); |
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my $status_node = $xpc->findnodes($xpath_status,$root)->shift; |
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$args->{header_status} = $status_node ? $status_node->textContent : ""; |
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} |
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|
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return bless ($args, $class); |
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} |
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|
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sub is_deleted_upstream { |
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my ($self, $args) = @_; |
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if ($self->{header_status}){ |
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if ($self->{header_status} eq "deleted"){ |
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return 1; |
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} |
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} |
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return 0; |
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} |
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sub set_filter { |
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my ($self, $filter_definition) = @_; |
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|
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#Source a default XSLT to use for filtering |
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my $htdocs = C4::Context->config('intrahtdocs'); |
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my $theme = C4::Context->preference("template"); |
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#FIXME: This doesn't work for UNIMARC, as it's specific to MARC21! |
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$self->{filter} = "$htdocs/$theme/en/xslt/OAI2MARC21slim.xsl"; |
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|
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if ($filter_definition){ |
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my ($filter_type, $filter) = $self->_parse_filter($filter_definition); |
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if ($filter_type eq "xslt"){ |
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if ( -f $filter ){ |
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$self->{filter} = $filter; |
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$self->{filter_type} = "xslt"; |
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} |
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} |
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} |
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} |
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sub _parse_filter { |
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my ($self,$filter_definition) = @_; |
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my ($type,$filter); |
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my $filter_uri = URI->new($filter_definition); |
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if ($filter_uri){ |
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my $scheme = $filter_uri->scheme; |
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if ( ($scheme && $scheme eq "file") || ! $scheme ){ |
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my $path = $filter_uri->path; |
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#Filters may theoretically be .xsl or .pm files |
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my($filename, $dirs, $suffix) = fileparse($path,(".xsl",".pm")); |
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if ($suffix){ |
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if ( $suffix eq ".xsl"){ |
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$type = "xslt"; |
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$filter = $path; |
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} |
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} |
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} |
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} |
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return ($type,$filter); |
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} |
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sub filter { |
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my ($self) = @_; |
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my $filtered = 0; |
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my $doc = $self->{doc}; |
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my $filter = $self->{filter}; |
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my $filter_type = $self->{filter_type}; |
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if ($doc){ |
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if ($filter && -f $filter){ |
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if ($filter_type){ |
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if ( $filter_type eq 'xslt' ){ |
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my $xslt = XML::LibXSLT->new(); |
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my $style_doc = XML::LibXML->load_xml(location => $filter); |
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my $stylesheet = $xslt->parse_stylesheet($style_doc); |
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if ($stylesheet){ |
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my $results = $stylesheet->transform($doc); |
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my $filtered_record = $stylesheet->output_as_bytes($results); |
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if ($filtered_record){ |
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$self->{filtered_record} = $filtered_record; |
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return 1; |
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} |
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} |
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} |
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} |
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} |
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} |
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return 0; |
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} |
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sub import_record { |
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my ($self, $args) = @_; |
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my $koha_record_numbers = ""; |
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my $errors = []; |
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my $import_status = "error"; |
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my $match_status = "no_match"; |
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my $batch_id = $args->{import_batch_id}; |
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$self->{import_batch_id} = $batch_id; |
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my $matcher = $args->{matcher}; |
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my $framework = $args->{framework}; |
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my $metadata_xml = $self->{filtered_record}; |
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if ($metadata_xml){ |
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#Convert MARCXML into MARC::Record object |
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my $marcflavour = C4::Context->preference('marcflavour') || 'MARC21'; |
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my $marc_record = eval {MARC::Record::new_from_xml( $metadata_xml, "utf8", $marcflavour)}; |
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if ($@) { |
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push(@$errors, { type => 'create_failed', error_msg => "Error converting OAI-PMH filtered metadata into MARC::Record object: $@", record_id => "", }) ; |
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} |
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if ($self->is_deleted_upstream){ |
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#FIXME: Biblio only. Add authority record support later... |
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my $import_record_id = AddBiblioToBatch($batch_id, 0, $marc_record, "utf8", int(rand(99999))); |
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my $number_of_matches = BatchFindDuplicates($batch_id, $matcher, MAX_MATCHES); |
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if ($number_of_matches > 0){ |
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$match_status = "auto_match"; #See `import_records` table for other options... but this should be the right one. |
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} |
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my $results = GetImportRecordMatches($import_record_id); #Only works for biblio... |
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my $delete_error; |
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my @result_record_numbers = (); |
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foreach my $result (@$results){ |
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if (my $record_id = $result->{biblionumber}){ |
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push(@result_record_numbers,$record_id); |
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#FIXME: Biblio only. Add authority record support later... |
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my $error = C4::Biblio::DelBiblio($record_id); |
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if ($error){ |
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$delete_error++; |
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push(@$errors, { type => 'delete_failed', error_msg => $error, record_id => $record_id, }) ; |
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} |
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} |
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} |
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$koha_record_numbers = join(",",@result_record_numbers); |
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if ($delete_error){ |
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$import_status = "error"; |
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C4::ImportBatch::SetImportBatchStatus($batch_id, 'importing'); |
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} else { |
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$import_status = "ok"; |
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#Ideally, it would be nice to say what records were deleted via the MARC import functionality, but Koha doesn't have that capacity at the moment, so just clean the batch. |
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CleanBatch($batch_id); |
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} |
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} else { |
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#Import the MARCXML record into Koha |
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#FIXME: Biblio only. Add authority record support later... |
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my $import_record_id = AddBiblioToBatch($batch_id, 0, $marc_record, "utf8", int(rand(99999))); |
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#NOTE: Don't provide item imports since there's no reliable way of tracking changes to them over time. |
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#my @import_items_ids = AddItemsToImportBiblio($batch_id, $import_record_id, $marc_record, 'UPDATE COUNTS'); |
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my $number_of_matches = BatchFindDuplicates($batch_id, $matcher); |
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BatchCommitRecords($batch_id, $framework); |
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my $dbh = C4::Context->dbh(); |
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#FIXME: Biblio only. Add authority record support later... |
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my $sth = $dbh->prepare("SELECT matched_biblionumber FROM import_biblios WHERE import_record_id =?"); |
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$sth->execute($import_record_id); |
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$koha_record_numbers = $sth->fetchrow_arrayref->[0] || ''; |
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$sth = $dbh->prepare("SELECT overlay_status FROM import_records WHERE import_record_id =?"); |
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$sth->execute($import_record_id); |
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$match_status = $sth->fetchrow_arrayref->[0] || 'no_match'; |
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$import_status = "ok"; |
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} |
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} else { |
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#There's no filtered metadata... |
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#Clean the batch, so future imports don't use the same batch. |
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CleanBatch($batch_id); |
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} |
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$self->{status} = $import_status; |
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return ($import_status,$match_status,$koha_record_numbers, $errors); |
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} |
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sub save_to_database { |
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my ($self,$args) = @_; |
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my $header_identifier = $self->{header_identifier}; |
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my $header_datestamp = $self->{header_datestamp}; |
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my $header_status = $self->{header_status}; |
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my $record = $self->{doc}->toString(1); |
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my $import_batch_id = $self->{import_batch_id}; |
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my $filter = $self->{filter}; |
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my $status = $self->{status}; |
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my $dbh = C4::Context->dbh; |
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my $sql = "INSERT INTO import_oai (header_identifier, header_datestamp, header_status, record, import_batch_id, filter, status) VALUES (?, ?, ?, ?, ?, ?, ?)"; |
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my $sth = $dbh->prepare($sql); |
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$sth->execute($header_identifier,$header_datestamp,$header_status,$record, $import_batch_id, $filter, $status); |
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} |
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1; |