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867 lines
27 KiB
867 lines
27 KiB
package C4::Matcher;
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# Copyright (C) 2007 LibLime, 2012 C & P Bibliography Services
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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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use strict;
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use warnings;
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use C4::Context;
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use MARC::Record;
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use Koha::SearchEngine;
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use Koha::SearchEngine::Search;
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=head1 NAME
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C4::Matcher - find MARC records matching another one
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=head1 SYNOPSIS
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my @matchers = C4::Matcher::GetMatcherList();
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my $matcher = C4::Matcher->new($record_type);
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$matcher->threshold($threshold);
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$matcher->code($code);
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$matcher->description($description);
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$matcher->add_simple_matchpoint('isbn', 1000, '020', 'a', -1, 0, '');
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$matcher->add_simple_matchpoint('Date', 1000, '008', '', 7, 4, '');
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$matcher->add_matchpoint('isbn', 1000, [ { tag => '020', subfields => 'a', norms => [] } ]);
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$matcher->add_simple_required_check('245', 'a', -1, 0, '', '245', 'a', -1, 0, '');
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$matcher->add_required_check([ { tag => '245', subfields => 'a', norms => [] } ],
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[ { tag => '245', subfields => 'a', norms => [] } ]);
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my @matches = $matcher->get_matches($marc_record, $max_matches);
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foreach $match (@matches) {
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# matches already sorted in order of
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# decreasing score
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print "record ID: $match->{'record_id'};
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print "score: $match->{'score'};
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}
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my $matcher_description = $matcher->dump();
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=head1 FUNCTIONS
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=cut
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=head2 GetMatcherList
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my @matchers = C4::Matcher::GetMatcherList();
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Returns an array of hashrefs list all matchers
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present in the database. Each hashref includes:
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* matcher_id
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* code
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* description
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=cut
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sub GetMatcherList {
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my $dbh = C4::Context->dbh;
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my $sth = $dbh->prepare_cached("SELECT matcher_id, code, description FROM marc_matchers ORDER BY matcher_id");
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$sth->execute();
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my @results = ();
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while (my $row = $sth->fetchrow_hashref) {
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push @results, $row;
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}
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return @results;
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}
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=head2 GetMatcherId
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my $matcher_id = C4::Matcher::GetMatcherId($code);
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Returns the matcher_id of a code.
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=cut
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sub GetMatcherId {
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my ($code) = @_;
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my $dbh = C4::Context->dbh;
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my $matcher_id = $dbh->selectrow_array("SELECT matcher_id FROM marc_matchers WHERE code = ?", undef, $code);
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return $matcher_id;
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}
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=head1 METHODS
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=head2 new
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my $matcher = C4::Matcher->new($record_type, $threshold);
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Creates a new Matcher. C<$record_type> indicates which search
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database to use, e.g., 'biblio' or 'authority' and defaults to
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'biblio', while C<$threshold> is the minimum score required for a match
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and defaults to 1000.
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=cut
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sub new {
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my $class = shift;
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my $self = {};
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$self->{'id'} = undef;
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if ($#_ > -1) {
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$self->{'record_type'} = shift;
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} else {
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$self->{'record_type'} = 'biblio';
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}
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if ($#_ > -1) {
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$self->{'threshold'} = shift;
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} else {
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$self->{'threshold'} = 1000;
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}
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$self->{'code'} = '';
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$self->{'description'} = '';
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$self->{'matchpoints'} = [];
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$self->{'required_checks'} = [];
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bless $self, $class;
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return $self;
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}
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=head2 fetch
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my $matcher = C4::Matcher->fetch($id);
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Creates a matcher object from the version stored
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in the database. If a matcher with the given
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id does not exist, returns undef.
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=cut
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sub fetch {
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my $class = shift;
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my $id = shift;
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my $dbh = C4::Context->dbh();
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my $sth = $dbh->prepare_cached("SELECT * FROM marc_matchers WHERE matcher_id = ?");
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$sth->execute($id);
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my $row = $sth->fetchrow_hashref;
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$sth->finish();
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return undef unless defined $row;
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my $self = {};
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$self->{'id'} = $row->{'matcher_id'};
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$self->{'record_type'} = $row->{'record_type'};
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$self->{'code'} = $row->{'code'};
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$self->{'description'} = $row->{'description'};
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$self->{'threshold'} = int($row->{'threshold'});
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bless $self, $class;
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# matchpoints
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$self->{'matchpoints'} = [];
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$sth = $dbh->prepare_cached("SELECT * FROM matcher_matchpoints WHERE matcher_id = ? ORDER BY matchpoint_id");
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$sth->execute($self->{'id'});
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while (my $row = $sth->fetchrow_hashref) {
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my $matchpoint = $self->_fetch_matchpoint($row->{'matchpoint_id'});
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push @{ $self->{'matchpoints'} }, $matchpoint;
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}
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# required checks
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$self->{'required_checks'} = [];
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$sth = $dbh->prepare_cached("SELECT * FROM matchchecks WHERE matcher_id = ? ORDER BY matchcheck_id");
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$sth->execute($self->{'id'});
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while (my $row = $sth->fetchrow_hashref) {
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my $source_matchpoint = $self->_fetch_matchpoint($row->{'source_matchpoint_id'});
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my $target_matchpoint = $self->_fetch_matchpoint($row->{'target_matchpoint_id'});
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my $matchcheck = {};
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$matchcheck->{'source_matchpoint'} = $source_matchpoint;
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$matchcheck->{'target_matchpoint'} = $target_matchpoint;
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push @{ $self->{'required_checks'} }, $matchcheck;
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}
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return $self;
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}
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sub _fetch_matchpoint {
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my $self = shift;
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my $matchpoint_id = shift;
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my $dbh = C4::Context->dbh;
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my $sth = $dbh->prepare_cached("SELECT * FROM matchpoints WHERE matchpoint_id = ?");
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$sth->execute($matchpoint_id);
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my $row = $sth->fetchrow_hashref;
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my $matchpoint = {};
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$matchpoint->{'index'} = $row->{'search_index'};
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$matchpoint->{'score'} = int($row->{'score'});
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$sth->finish();
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$matchpoint->{'components'} = [];
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$sth = $dbh->prepare_cached("SELECT * FROM matchpoint_components WHERE matchpoint_id = ? ORDER BY sequence");
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$sth->execute($matchpoint_id);
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while ($row = $sth->fetchrow_hashref) {
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my $component = {};
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$component->{'tag'} = $row->{'tag'};
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$component->{'subfields'} = { map { $_ => 1 } split(//, $row->{'subfields'}) };
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$component->{'offset'} = int($row->{'offset'});
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$component->{'length'} = int($row->{'length'});
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$component->{'norms'} = [];
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my $sth2 = $dbh->prepare_cached("SELECT *
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FROM matchpoint_component_norms
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WHERE matchpoint_component_id = ? ORDER BY sequence");
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$sth2->execute($row->{'matchpoint_component_id'});
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while (my $row2 = $sth2->fetchrow_hashref) {
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push @{ $component->{'norms'} }, $row2->{'norm_routine'};
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}
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push @{ $matchpoint->{'components'} }, $component;
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}
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return $matchpoint;
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}
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=head2 store
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my $id = $matcher->store();
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Stores matcher in database. The return value is the ID
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of the marc_matchers row. If the matcher was
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previously retrieved from the database via the fetch()
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method, the DB representation of the matcher
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is replaced.
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=cut
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sub store {
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my $self = shift;
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if (defined $self->{'id'}) {
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# update
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$self->_del_matcher_components();
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$self->_update_marc_matchers();
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} else {
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# create new
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$self->_new_marc_matchers();
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}
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$self->_store_matcher_components();
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return $self->{'id'};
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}
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sub _del_matcher_components {
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my $self = shift;
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my $dbh = C4::Context->dbh();
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my $sth = $dbh->prepare_cached("DELETE FROM matchpoints WHERE matcher_id = ?");
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$sth->execute($self->{'id'});
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$sth = $dbh->prepare_cached("DELETE FROM matchchecks WHERE matcher_id = ?");
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$sth->execute($self->{'id'});
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# foreign key delete cascades take care of deleting relevant rows
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# from matcher_matchpoints, matchpoint_components, and
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# matchpoint_component_norms
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}
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sub _update_marc_matchers {
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my $self = shift;
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my $dbh = C4::Context->dbh();
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my $sth = $dbh->prepare_cached("UPDATE marc_matchers
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SET code = ?,
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description = ?,
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record_type = ?,
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threshold = ?
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WHERE matcher_id = ?");
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$sth->execute($self->{'code'}, $self->{'description'}, $self->{'record_type'}, $self->{'threshold'}, $self->{'id'});
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}
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sub _new_marc_matchers {
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my $self = shift;
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my $dbh = C4::Context->dbh();
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my $sth = $dbh->prepare_cached("INSERT INTO marc_matchers
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(code, description, record_type, threshold)
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VALUES (?, ?, ?, ?)");
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$sth->execute($self->{'code'}, $self->{'description'}, $self->{'record_type'}, $self->{'threshold'});
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$self->{'id'} = $dbh->{'mysql_insertid'};
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}
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sub _store_matcher_components {
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my $self = shift;
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my $dbh = C4::Context->dbh();
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my $sth;
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my $matcher_id = $self->{'id'};
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foreach my $matchpoint (@{ $self->{'matchpoints'}}) {
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my $matchpoint_id = $self->_store_matchpoint($matchpoint);
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$sth = $dbh->prepare_cached("INSERT INTO matcher_matchpoints (matcher_id, matchpoint_id)
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VALUES (?, ?)");
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$sth->execute($matcher_id, $matchpoint_id);
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}
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foreach my $matchcheck (@{ $self->{'required_checks'} }) {
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my $source_matchpoint_id = $self->_store_matchpoint($matchcheck->{'source_matchpoint'});
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my $target_matchpoint_id = $self->_store_matchpoint($matchcheck->{'target_matchpoint'});
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$sth = $dbh->prepare_cached("INSERT INTO matchchecks
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(matcher_id, source_matchpoint_id, target_matchpoint_id)
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VALUES (?, ?, ?)");
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$sth->execute($matcher_id, $source_matchpoint_id, $target_matchpoint_id);
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}
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}
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sub _store_matchpoint {
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my $self = shift;
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my $matchpoint = shift;
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my $dbh = C4::Context->dbh();
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my $sth;
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my $matcher_id = $self->{'id'};
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$sth = $dbh->prepare_cached("INSERT INTO matchpoints (matcher_id, search_index, score)
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VALUES (?, ?, ?)");
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$sth->execute($matcher_id, $matchpoint->{'index'}, $matchpoint->{'score'});
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my $matchpoint_id = $dbh->{'mysql_insertid'};
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my $seqnum = 0;
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foreach my $component (@{ $matchpoint->{'components'} }) {
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$seqnum++;
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$sth = $dbh->prepare_cached("INSERT INTO matchpoint_components
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(matchpoint_id, sequence, tag, subfields, offset, length)
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VALUES (?, ?, ?, ?, ?, ?)");
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$sth->bind_param(1, $matchpoint_id);
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$sth->bind_param(2, $seqnum);
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$sth->bind_param(3, $component->{'tag'});
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$sth->bind_param(4, join "", sort keys %{ $component->{'subfields'} });
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$sth->bind_param(5, $component->{'offset'});
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$sth->bind_param(6, $component->{'length'});
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$sth->execute();
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my $matchpoint_component_id = $dbh->{'mysql_insertid'};
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my $normseq = 0;
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foreach my $norm (@{ $component->{'norms'} }) {
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$normseq++;
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$sth = $dbh->prepare_cached("INSERT INTO matchpoint_component_norms
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(matchpoint_component_id, sequence, norm_routine)
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VALUES (?, ?, ?)");
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$sth->execute($matchpoint_component_id, $normseq, $norm);
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}
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}
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return $matchpoint_id;
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}
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=head2 delete
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C4::Matcher->delete($id);
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Deletes the matcher of the specified ID
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from the database.
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=cut
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sub delete {
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my $class = shift;
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my $matcher_id = shift;
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my $dbh = C4::Context->dbh;
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my $sth = $dbh->prepare("DELETE FROM marc_matchers WHERE matcher_id = ?");
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$sth->execute($matcher_id); # relying on cascading deletes to clean up everything
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}
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=head2 record_type
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$matcher->record_type('biblio');
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my $record_type = $matcher->record_type();
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Accessor method.
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=cut
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sub record_type {
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my $self = shift;
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@_ ? $self->{'record_type'} = shift : $self->{'record_type'};
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}
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=head2 threshold
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$matcher->threshold(1000);
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my $threshold = $matcher->threshold();
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Accessor method.
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=cut
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sub threshold {
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my $self = shift;
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@_ ? $self->{'threshold'} = shift : $self->{'threshold'};
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}
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=head2 _id
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$matcher->_id(123);
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my $id = $matcher->_id();
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Accessor method. Note that using this method
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to set the DB ID of the matcher should not be
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done outside of the editing CGI.
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=cut
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sub _id {
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my $self = shift;
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@_ ? $self->{'id'} = shift : $self->{'id'};
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}
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=head2 code
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$matcher->code('ISBN');
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my $code = $matcher->code();
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Accessor method.
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=cut
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sub code {
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my $self = shift;
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@_ ? $self->{'code'} = shift : $self->{'code'};
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}
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=head2 description
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$matcher->description('match on ISBN');
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my $description = $matcher->description();
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Accessor method.
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=cut
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sub description {
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my $self = shift;
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@_ ? $self->{'description'} = shift : $self->{'description'};
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}
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=head2 add_matchpoint
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$matcher->add_matchpoint($index, $score, $matchcomponents);
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Adds a matchpoint that may include multiple components. The $index
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parameter identifies the index that will be searched, while $score
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is the weight that will be added if a match is found.
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$matchcomponents should be a reference to an array of matchpoint
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compoents, each of which should be a hash containing the following
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keys:
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tag
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subfields
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offset
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length
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norms
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The normalization_rules value should in turn be a reference to an
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array, each element of which should be a reference to a
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normalization subroutine (under C4::Normalize) to be applied
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to the source string.
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=cut
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sub add_matchpoint {
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my $self = shift;
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my ($index, $score, $matchcomponents) = @_;
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my $matchpoint = {};
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$matchpoint->{'index'} = $index;
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$matchpoint->{'score'} = $score;
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$matchpoint->{'components'} = [];
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foreach my $input_component (@{ $matchcomponents }) {
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push @{ $matchpoint->{'components'} }, _parse_match_component($input_component);
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}
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push @{ $self->{'matchpoints'} }, $matchpoint;
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}
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=head2 add_simple_matchpoint
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$matcher->add_simple_matchpoint($index, $score, $source_tag,
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$source_subfields, $source_offset,
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$source_length, $source_normalizer);
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Adds a simple matchpoint rule -- after composing a key based on the source tag and subfields,
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normalized per the normalization fuction, search the index. All records retrieved
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will receive the assigned score.
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=cut
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sub add_simple_matchpoint {
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my $self = shift;
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my ($index, $score, $source_tag, $source_subfields, $source_offset, $source_length, $source_normalizer) = @_;
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$self->add_matchpoint($index, $score, [
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{ tag => $source_tag, subfields => $source_subfields,
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offset => $source_offset, 'length' => $source_length,
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norms => [ $source_normalizer ]
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}
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]);
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}
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=head2 add_required_check
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$match->add_required_check($source_matchpoint, $target_matchpoint);
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Adds a required check definition. A required check means that in
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order for a match to be considered valid, the key derived from the
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source (incoming) record must match the key derived from the target
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(already in DB) record.
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Unlike a regular matchpoint, only the first repeat of each tag
|
|
in the source and target match criteria are considered.
|
|
|
|
A typical example of a required check would be verifying that the
|
|
titles and publication dates match.
|
|
|
|
$source_matchpoint and $target_matchpoint are each a reference to
|
|
an array of hashes, where each hash follows the same definition
|
|
as the matchpoint component specification in add_matchpoint, i.e.,
|
|
|
|
tag
|
|
subfields
|
|
offset
|
|
length
|
|
norms
|
|
|
|
The normalization_rules value should in turn be a reference to an
|
|
array, each element of which should be a reference to a
|
|
normalization subroutine (under C4::Normalize) to be applied
|
|
to the source string.
|
|
|
|
=cut
|
|
|
|
sub add_required_check {
|
|
my $self = shift;
|
|
my ($source_matchpoint, $target_matchpoint) = @_;
|
|
|
|
my $matchcheck = {};
|
|
$matchcheck->{'source_matchpoint'}->{'index'} = '';
|
|
$matchcheck->{'source_matchpoint'}->{'score'} = 0;
|
|
$matchcheck->{'source_matchpoint'}->{'components'} = [];
|
|
$matchcheck->{'target_matchpoint'}->{'index'} = '';
|
|
$matchcheck->{'target_matchpoint'}->{'score'} = 0;
|
|
$matchcheck->{'target_matchpoint'}->{'components'} = [];
|
|
foreach my $input_component (@{ $source_matchpoint }) {
|
|
push @{ $matchcheck->{'source_matchpoint'}->{'components'} }, _parse_match_component($input_component);
|
|
}
|
|
foreach my $input_component (@{ $target_matchpoint }) {
|
|
push @{ $matchcheck->{'target_matchpoint'}->{'components'} }, _parse_match_component($input_component);
|
|
}
|
|
push @{ $self->{'required_checks'} }, $matchcheck;
|
|
}
|
|
|
|
=head2 add_simple_required_check
|
|
|
|
$matcher->add_simple_required_check($source_tag, $source_subfields,
|
|
$source_offset, $source_length, $source_normalizer,
|
|
$target_tag, $target_subfields, $target_offset,
|
|
$target_length, $target_normalizer);
|
|
|
|
Adds a required check, which requires that the normalized keys made from the source and targets
|
|
must match for a match to be considered valid.
|
|
|
|
=cut
|
|
|
|
sub add_simple_required_check {
|
|
my $self = shift;
|
|
my ($source_tag, $source_subfields, $source_offset, $source_length, $source_normalizer,
|
|
$target_tag, $target_subfields, $target_offset, $target_length, $target_normalizer) = @_;
|
|
|
|
$self->add_required_check(
|
|
[ { tag => $source_tag, subfields => $source_subfields, offset => $source_offset, 'length' => $source_length,
|
|
norms => [ $source_normalizer ] } ],
|
|
[ { tag => $target_tag, subfields => $target_subfields, offset => $target_offset, 'length' => $target_length,
|
|
norms => [ $target_normalizer ] } ]
|
|
);
|
|
}
|
|
|
|
=head2 get_matches
|
|
|
|
my @matches = $matcher->get_matches($marc_record, $max_matches);
|
|
foreach $match (@matches) {
|
|
# matches already sorted in order of
|
|
# decreasing score
|
|
print "record ID: $match->{'record_id'};
|
|
print "score: $match->{'score'};
|
|
}
|
|
|
|
Identifies all of the records matching the given MARC record. For a record already
|
|
in the database to be considered a match, it must meet the following criteria:
|
|
|
|
=over 2
|
|
|
|
=item 1. Total score from its matching field must exceed the supplied threshold.
|
|
|
|
=item 2. It must pass all required checks.
|
|
|
|
=back
|
|
|
|
Only the top $max_matches matches are returned. The returned array is sorted
|
|
in order of decreasing score, i.e., the best match is first.
|
|
|
|
=cut
|
|
|
|
sub get_matches {
|
|
my $self = shift;
|
|
my ($source_record, $max_matches) = @_;
|
|
|
|
my %matches = ();
|
|
|
|
my $QParser;
|
|
$QParser = C4::Context->queryparser if (C4::Context->preference('UseQueryParser'));
|
|
foreach my $matchpoint ( @{ $self->{'matchpoints'} } ) {
|
|
my @source_keys = _get_match_keys( $source_record, $matchpoint );
|
|
|
|
next if scalar(@source_keys) == 0;
|
|
|
|
# FIXME - because of a bug in QueryParser, an expression ofthe
|
|
# format 'isbn:"isbn1" || isbn:"isbn2" || isbn"isbn3"...'
|
|
# does not get parsed correctly, so we will not
|
|
# do AggressiveMatchOnISBN if UseQueryParser is on
|
|
@source_keys = C4::Koha::GetVariationsOfISBNs(@source_keys)
|
|
if ( $matchpoint->{index} =~ /^isbn$/i
|
|
&& C4::Context->preference('AggressiveMatchOnISBN') )
|
|
&& !C4::Context->preference('UseQueryParser');
|
|
|
|
# build query
|
|
my $query;
|
|
my $error;
|
|
my $searchresults;
|
|
my $total_hits;
|
|
if ( $self->{'record_type'} eq 'biblio' ) {
|
|
|
|
if ($QParser) {
|
|
$query = join( " || ",
|
|
map { "$matchpoint->{'index'}:$_" } @source_keys );
|
|
}
|
|
else {
|
|
my $phr = C4::Context->preference('AggressiveMatchOnISBN') ? ',phr' : q{};
|
|
$query = join( " or ",
|
|
map { "$matchpoint->{'index'}$phr=\"$_\"" } @source_keys );
|
|
#NOTE: double-quote the values so you don't get a "Embedded truncation not supported" error when a term has a ? in it.
|
|
}
|
|
|
|
my $searcher = Koha::SearchEngine::Search->new({index => $Koha::SearchEngine::BIBLIOS_INDEX});
|
|
( $error, $searchresults, $total_hits ) =
|
|
$searcher->simple_search_compat( $query, 0, $max_matches );
|
|
}
|
|
elsif ( $self->{'record_type'} eq 'authority' ) {
|
|
my $authresults;
|
|
my @marclist;
|
|
my @and_or;
|
|
my @excluding = [];
|
|
my @operator;
|
|
my @value;
|
|
foreach my $key (@source_keys) {
|
|
push @marclist, $matchpoint->{'index'};
|
|
push @and_or, 'or';
|
|
push @operator, 'exact';
|
|
push @value, $key;
|
|
}
|
|
require C4::AuthoritiesMarc;
|
|
( $authresults, $total_hits ) =
|
|
C4::AuthoritiesMarc::SearchAuthorities(
|
|
\@marclist, \@and_or, \@excluding, \@operator,
|
|
\@value, 0, 20, undef,
|
|
'AuthidAsc', 1
|
|
);
|
|
foreach my $result (@$authresults) {
|
|
push @$searchresults, $result->{'authid'};
|
|
}
|
|
}
|
|
|
|
if ( defined $error ) {
|
|
warn "search failed ($query) $error";
|
|
}
|
|
else {
|
|
foreach my $matched ( @{$searchresults} ) {
|
|
$matches{$matched} += $matchpoint->{'score'};
|
|
}
|
|
}
|
|
}
|
|
|
|
# get rid of any that don't meet the threshold
|
|
%matches = map { ($matches{$_} >= $self->{'threshold'}) ? ($_ => $matches{$_}) : () } keys %matches;
|
|
|
|
# get rid of any that don't meet the required checks
|
|
%matches = map { _passes_required_checks($source_record, $_, $self->{'required_checks'}) ? ($_ => $matches{$_}) : () }
|
|
keys %matches unless ($self->{'record_type'} eq 'auth');
|
|
|
|
my @results = ();
|
|
if ($self->{'record_type'} eq 'biblio') {
|
|
require C4::Biblio;
|
|
foreach my $marcblob (keys %matches) {
|
|
my $target_record = C4::Search::new_record_from_zebra('biblioserver',$marcblob);
|
|
my $record_number;
|
|
my $result = C4::Biblio::TransformMarcToKoha($target_record, '');
|
|
$record_number = $result->{'biblionumber'};
|
|
push @results, { 'record_id' => $record_number, 'score' => $matches{$marcblob} };
|
|
}
|
|
} elsif ($self->{'record_type'} eq 'authority') {
|
|
require C4::AuthoritiesMarc;
|
|
foreach my $authid (keys %matches) {
|
|
push @results, { 'record_id' => $authid, 'score' => $matches{$authid} };
|
|
}
|
|
}
|
|
@results = sort { $b->{'score'} cmp $a->{'score'} } @results;
|
|
if (scalar(@results) > $max_matches) {
|
|
@results = @results[0..$max_matches-1];
|
|
}
|
|
return @results;
|
|
|
|
}
|
|
|
|
=head2 dump
|
|
|
|
$description = $matcher->dump();
|
|
|
|
Returns a reference to a structure containing all of the information
|
|
in the matcher object. This is mainly a convenience method to
|
|
aid setting up a HTML editing form.
|
|
|
|
=cut
|
|
|
|
sub dump {
|
|
my $self = shift;
|
|
|
|
my $result = {};
|
|
|
|
$result->{'matcher_id'} = $self->{'id'};
|
|
$result->{'code'} = $self->{'code'};
|
|
$result->{'description'} = $self->{'description'};
|
|
$result->{'record_type'} = $self->{'record_type'};
|
|
|
|
$result->{'matchpoints'} = [];
|
|
foreach my $matchpoint (@{ $self->{'matchpoints'} }) {
|
|
push @{ $result->{'matchpoints'} }, $matchpoint;
|
|
}
|
|
$result->{'matchchecks'} = [];
|
|
foreach my $matchcheck (@{ $self->{'required_checks'} }) {
|
|
push @{ $result->{'matchchecks'} }, $matchcheck;
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
sub _passes_required_checks {
|
|
my ($source_record, $target_blob, $matchchecks) = @_;
|
|
my $target_record = MARC::Record->new_from_usmarc($target_blob); # FIXME -- need to avoid parsing record twice
|
|
|
|
# no checks supplied == automatic pass
|
|
return 1 if $#{ $matchchecks } == -1;
|
|
|
|
foreach my $matchcheck (@{ $matchchecks }) {
|
|
my $source_key = join "", _get_match_keys($source_record, $matchcheck->{'source_matchpoint'});
|
|
my $target_key = join "", _get_match_keys($target_record, $matchcheck->{'target_matchpoint'});
|
|
return 0 unless $source_key eq $target_key;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
sub _get_match_keys {
|
|
my $source_record = shift;
|
|
my $matchpoint = shift;
|
|
my $check_only_first_repeat = @_ ? shift : 0;
|
|
|
|
# If there is more than one component to the matchpoint (e.g.,
|
|
# matchpoint includes both 003 and 001), any repeats
|
|
# of the first component's tag are identified; repeats
|
|
# of the subsequent components' tags are appended to
|
|
# each parallel key dervied from the first component,
|
|
# up to the number of repeats of the first component's tag.
|
|
#
|
|
# For example, if the record has one 003 and two 001s, only
|
|
# one key is retrieved because there is only one 003. The key
|
|
# will consist of the contents of the first 003 and first 001.
|
|
#
|
|
# If there are two 003s and two 001s, there will be two keys:
|
|
# first 003 + first 001
|
|
# second 003 + second 001
|
|
|
|
my @keys = ();
|
|
for (my $i = 0; $i <= $#{ $matchpoint->{'components'} }; $i++) {
|
|
my $component = $matchpoint->{'components'}->[$i];
|
|
my $j = -1;
|
|
FIELD: foreach my $field ($source_record->field($component->{'tag'})) {
|
|
$j++;
|
|
last FIELD if $j > 0 and $check_only_first_repeat;
|
|
last FIELD if $i > 0 and $j > $#keys;
|
|
my $key = "";
|
|
my $string;
|
|
if ($field->is_control_field()) {
|
|
$string=$field->data();
|
|
} else {
|
|
foreach my $subfield ($field->subfields()) {
|
|
if (exists $component->{'subfields'}->{$subfield->[0]}) {
|
|
$string .= " " . $subfield->[1]; #FIXME: It would be better to create an array and join with a space later...
|
|
}
|
|
}
|
|
}
|
|
if ($component->{'length'}>0) {
|
|
$string= substr($string, $component->{'offset'}, $component->{'length'});
|
|
# FIXME normalize, substr
|
|
} elsif ($component->{'offset'}) {
|
|
$string= substr($string, $component->{'offset'});
|
|
}
|
|
$key = _normalize($string);
|
|
if ($i == 0) {
|
|
push @keys, $key if $key;
|
|
} else {
|
|
$keys[$j] .= " $key" if $key;
|
|
}
|
|
}
|
|
}
|
|
return @keys;
|
|
}
|
|
|
|
|
|
sub _parse_match_component {
|
|
my $input_component = shift;
|
|
|
|
my $component = {};
|
|
$component->{'tag'} = $input_component->{'tag'};
|
|
$component->{'subfields'} = { map { $_ => 1 } split(//, $input_component->{'subfields'}) };
|
|
$component->{'offset'} = exists($input_component->{'offset'}) ? $input_component->{'offset'} : -1;
|
|
$component->{'length'} = $input_component->{'length'} ? $input_component->{'length'} : 0;
|
|
$component->{'norms'} = $input_component->{'norms'} ? $input_component->{'norms'} : [];
|
|
|
|
return $component;
|
|
}
|
|
|
|
# FIXME - default normalizer
|
|
sub _normalize {
|
|
my $value = uc shift;
|
|
$value =~ s/[.;:,\]\[\)\(\/'"]//g;
|
|
$value =~ s/^\s+//;
|
|
#$value =~ s/^\s+$//;
|
|
$value =~ s/\s+$//;
|
|
$value =~ s/\s+/ /g;
|
|
#$value =~ s/[.;,\]\[\)\(\/"']//g;
|
|
return $value;
|
|
}
|
|
|
|
1;
|
|
__END__
|
|
|
|
=head1 AUTHOR
|
|
|
|
Koha Development Team <http://koha-community.org/>
|
|
|
|
Galen Charlton <galen.charlton@liblime.com>
|
|
|
|
=cut
|
|
|