|
Line 0
Link Here
|
|
|
1 |
#!/usr/bin/perl |
| 2 |
|
| 3 |
# Copyright 2014 Rijksmuseum |
| 4 |
# |
| 5 |
# This file is part of Koha. |
| 6 |
# |
| 7 |
# Koha is free software; you can redistribute it and/or modify it under the |
| 8 |
# terms of the GNU General Public License as published by the Free Software |
| 9 |
# Foundation; either version 3 of the License, or (at your option) any later |
| 10 |
# version. |
| 11 |
# |
| 12 |
# Koha is distributed in the hope that it will be useful, but WITHOUT ANY |
| 13 |
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
| 14 |
# A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
| 15 |
# |
| 16 |
# You should have received a copy of the GNU General Public License along |
| 17 |
# with Koha; if not, write to the Free Software Foundation, Inc., |
| 18 |
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 |
|
| 20 |
use Modern::Perl; |
| 21 |
|
| 22 |
sub load_zebra_exclude { |
| 23 |
my $pref = C4::Context->preference('ZebraExclude'); |
| 24 |
#this pref consists of lines /condition/:field list |
| 25 |
#the condition is a regex applied to the marcxml (and is optional) |
| 26 |
#field list contains XXX (whole record), 9XX (tab), 700 (field) or |
| 27 |
#650$ac (one or more subfields) |
| 28 |
return if !$pref; |
| 29 |
|
| 30 |
my $ret; #return hashref |
| 31 |
#add the biblionumber and biblioitemnumber tag for Koha to returned hash |
| 32 |
#we are asking for the default framework just as GetMarcBiblio does |
| 33 |
#the returned subfield is ignored; we will not exclude these tags |
| 34 |
( $ret->{biblio} ) = GetMarcFromKohaField( "biblio.biblionumber", ''); |
| 35 |
( $ret->{biblioitem} ) = |
| 36 |
GetMarcFromKohaField( "biblioitems.biblioitemnumber", ''); |
| 37 |
|
| 38 |
my @lines= split "\n", $pref; |
| 39 |
$ret->{list} = []; |
| 40 |
foreach my $li ( @lines ) { |
| 41 |
my ( $regex, $list ); |
| 42 |
if( $li =~ /\/(.*)(?<!\\)\/\s*:\s*/ ) { |
| 43 |
$regex= $1; |
| 44 |
$list= $'; |
| 45 |
} else { |
| 46 |
$list= $li; |
| 47 |
} |
| 48 |
$regex = _test_condition( $regex ); |
| 49 |
my $fh = _parse_fieldlist( $list , $ret ); |
| 50 |
push @{$ret->{list}}, [ $fh, $regex ] if $fh; |
| 51 |
} |
| 52 |
return $ret; |
| 53 |
} |
| 54 |
|
| 55 |
sub exclude_fields { |
| 56 |
my ($marc, $exclude) = @_; |
| 57 |
|
| 58 |
foreach my $rf ( @{$exclude->{list}} ) { |
| 59 |
my $rx= $rf->[1]; |
| 60 |
#check the condition if present; if not, continue |
| 61 |
#if the condition fails, skip this exclude step |
| 62 |
if( $rx && $marc->as_xml !~ /$rx/ ) { |
| 63 |
next; |
| 64 |
} |
| 65 |
|
| 66 |
#check wildcards like XXX or 9XX |
| 67 |
my $wildcards = $rf->[0]->{wildcard}; |
| 68 |
foreach my $w ( @$wildcards ) { |
| 69 |
if( $w eq 'XXX' ) { |
| 70 |
#skip the whole record |
| 71 |
return; |
| 72 |
} else { |
| 73 |
$w =~ s/XX/\.\./; |
| 74 |
$marc->delete_fields( _skip999($marc->field($w), $exclude) ); |
| 75 |
} |
| 76 |
} |
| 77 |
|
| 78 |
#check whole fields |
| 79 |
my $wholefields= $rf->[0]->{field}; |
| 80 |
foreach( @$wholefields ) { |
| 81 |
$marc->delete_fields( $marc->field($_) ); |
| 82 |
} |
| 83 |
|
| 84 |
#check subfields |
| 85 |
my $subs= $rf->[0]->{subfield}; |
| 86 |
foreach my $ref ( @$subs ) { |
| 87 |
my ($tag, $sub)= @$ref; |
| 88 |
foreach my $fld ( $marc->field($tag) ) { |
| 89 |
$fld->delete_subfield( code => qr/$sub/ ); |
| 90 |
if( !$fld->subfields() ) { |
| 91 |
#if it was the last subfield, delete whole field |
| 92 |
$marc->delete_fields( $fld ); |
| 93 |
} |
| 94 |
} |
| 95 |
} |
| 96 |
} |
| 97 |
return 1; |
| 98 |
} |
| 99 |
|
| 100 |
sub _test_condition { |
| 101 |
my $regex= shift; |
| 102 |
if( $regex ) { |
| 103 |
#test the regex |
| 104 |
eval { 'whatever string' =~ /$regex/ }; |
| 105 |
if( $@ ) { |
| 106 |
warn "Zebra exclude regex $regex fails!\n"; |
| 107 |
return; |
| 108 |
} |
| 109 |
} |
| 110 |
return $regex; |
| 111 |
} |
| 112 |
|
| 113 |
sub _parse_fieldlist { |
| 114 |
my ( $list, $check999 ) = @_; |
| 115 |
|
| 116 |
my $ret={}; |
| 117 |
my @list = split ",", $list; |
| 118 |
foreach( @list ) { |
| 119 |
next if !/^\s*(\d{3}|\dXX|XXX)\s*[\$:-]?\s*([A-Za-z0-9]*)\s*$/; |
| 120 |
my $tag= $1; |
| 121 |
my $sub= $2; |
| 122 |
if ( $tag =~ /XX/ ) { |
| 123 |
#we ignore sub here |
| 124 |
#the test for 999 tags in this case is done later on |
| 125 |
push @{$ret->{wildcard}}, $tag; |
| 126 |
} elsif( defined $sub && $sub ne '' ) { #could be e.g. '0' |
| 127 |
next if !_comp999( $tag, $check999 ); |
| 128 |
push @{$ret->{subfield}}, [ $tag, $sub ]; |
| 129 |
} else { |
| 130 |
next if !_comp999( $tag, $check999 ); |
| 131 |
push @{$ret->{field}}, $tag; |
| 132 |
} |
| 133 |
} |
| 134 |
if( keys %$ret ) { # add possible missing hash keys |
| 135 |
$ret->{wildcard} = [] if !exists $ret->{wildcard}; |
| 136 |
$ret->{subfield} = [] if !exists $ret->{subfield}; |
| 137 |
$ret->{field} = [] if !exists $ret->{field}; |
| 138 |
return $ret; |
| 139 |
} |
| 140 |
return; |
| 141 |
} |
| 142 |
|
| 143 |
sub _skip999 { |
| 144 |
my $excl= pop @_; |
| 145 |
#pass list of fields, removes the Koha biblio and biblioitem field |
| 146 |
#in order to not delete them |
| 147 |
#default tag is 999, but may have changed.. |
| 148 |
grep { _comp999($_->tag, $excl) } @_; |
| 149 |
} |
| 150 |
|
| 151 |
sub _comp999 { |
| 152 |
my ($tag, $excl) = @_; |
| 153 |
return $tag ne $excl->{biblio} && $tag ne $excl->{biblioitem}; |
| 154 |
} |
| 155 |
|
| 156 |
1; |