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#!/usr/bin/perl |
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# Copyright 2014 Rijksmuseum |
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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 under the |
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# terms of the GNU General Public License as published by the Free Software |
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# Foundation; either version 3 of the License, or (at your option) any later |
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# version. |
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# |
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# Koha is distributed in the hope that it will be useful, but WITHOUT ANY |
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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# A PARTICULAR PURPOSE. See the 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 along |
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# with Koha; if not, write to the Free Software Foundation, Inc., |
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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|
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use Modern::Perl; |
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|
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sub load_zebra_exclude { |
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my $pref = C4::Context->preference('ZebraExclude'); |
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#this pref consists of lines /condition/:field list |
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#the condition is a regex applied to the marcxml (and is optional) |
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#field list contains XXX (whole record), 9XX (tab), 700 (field) or |
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#650$ac (one or more subfields) |
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return if !$pref; |
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|
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my $ret; #return hashref |
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#add the biblionumber and biblioitemnumber tag for Koha to returned hash |
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#we are asking for the default framework just as GetMarcBiblio does |
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#the returned subfield is ignored; we will not exclude these tags |
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( $ret->{biblio} ) = GetMarcFromKohaField( "biblio.biblionumber", ''); |
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( $ret->{biblioitem} ) = |
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GetMarcFromKohaField( "biblioitems.biblioitemnumber", ''); |
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|
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my @lines= split "\n", $pref; |
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$ret->{list} = []; |
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foreach my $li ( @lines ) { |
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my ( $regex, $list ); |
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if( $li =~ /\/(.*)(?<!\\)\/\s*:\s*/ ) { |
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$regex= $1; |
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$list= $'; |
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} else { |
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$list= $li; |
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} |
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$regex = _test_condition( $regex ); |
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my $fh = _parse_fieldlist( $list , $ret ); |
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push @{$ret->{list}}, [ $fh, $regex ] if $fh; |
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} |
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return $ret; |
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} |
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|
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sub exclude_fields { |
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my ($marc, $exclude) = @_; |
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|
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foreach my $rf ( @{$exclude->{list}} ) { |
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my $rx= $rf->[1]; |
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#check the condition if present; if not, continue |
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#if the condition fails, skip this exclude step |
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if( $rx && $marc->as_xml !~ /$rx/ ) { |
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next; |
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} |
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|
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#check wildcards like XXX or 9XX |
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my $wildcards = $rf->[0]->{wildcard}; |
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foreach my $w ( @$wildcards ) { |
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if( $w eq 'XXX' ) { |
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#skip the whole record |
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return; |
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} else { |
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$w =~ s/XX/\.\./; |
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$marc->delete_fields( _skip999($marc->field($w), $exclude) ); |
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} |
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} |
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|
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#check whole fields |
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my $wholefields= $rf->[0]->{field}; |
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foreach( @$wholefields ) { |
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$marc->delete_fields( $marc->field($_) ); |
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} |
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|
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#check subfields |
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my $subs= $rf->[0]->{subfield}; |
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foreach my $ref ( @$subs ) { |
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my ($tag, $sub)= @$ref; |
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foreach my $fld ( $marc->field($tag) ) { |
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$fld->delete_subfield( code => qr/$sub/ ); |
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if( !$fld->subfields() ) { |
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#if it was the last subfield, delete whole field |
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$marc->delete_fields( $fld ); |
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} |
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} |
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} |
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} |
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return 1; |
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} |
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sub _test_condition { |
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my $regex= shift; |
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if( $regex ) { |
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#test the regex |
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eval { 'whatever string' =~ /$regex/ }; |
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if( $@ ) { |
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warn "Zebra exclude regex $regex fails!\n"; |
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return; |
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} |
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} |
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return $regex; |
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} |
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|
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sub _parse_fieldlist { |
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my ( $list, $check999 ) = @_; |
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|
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my $ret={}; |
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my @list = split ",", $list; |
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foreach( @list ) { |
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next if !/^\s*(\d{3}|\dXX|XXX)\s*[\$:-]?\s*([A-Za-z0-9]*)\s*$/; |
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my $tag= $1; |
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my $sub= $2; |
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if ( $tag =~ /XX/ ) { |
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#we ignore sub here |
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#the test for 999 tags in this case is done later on |
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push @{$ret->{wildcard}}, $tag; |
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} elsif( defined $sub && $sub ne '' ) { #could be e.g. '0' |
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next if !_comp999( $tag, $check999 ); |
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push @{$ret->{subfield}}, [ $tag, $sub ]; |
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} else { |
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next if !_comp999( $tag, $check999 ); |
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push @{$ret->{field}}, $tag; |
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} |
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} |
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if( keys %$ret ) { # add possible missing hash keys |
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$ret->{wildcard} = [] if !exists $ret->{wildcard}; |
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$ret->{subfield} = [] if !exists $ret->{subfield}; |
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$ret->{field} = [] if !exists $ret->{field}; |
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return $ret; |
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} |
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return; |
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} |
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sub _skip999 { |
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my $excl= pop @_; |
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#pass list of fields, removes the Koha biblio and biblioitem field |
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#in order to not delete them |
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#default tag is 999, but may have changed.. |
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grep { _comp999($_->tag, $excl) } @_; |
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} |
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sub _comp999 { |
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my ($tag, $excl) = @_; |
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return $tag ne $excl->{biblio} && $tag ne $excl->{biblioitem}; |
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} |
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1; |