| 1 |
package WebPAC::Normalize; |
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use Exporter 'import'; |
| 3 |
@EXPORT = qw/ |
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_set_rec _set_lookup |
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_get_ds _clean_ds |
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|
| 7 |
tag search display |
| 8 |
marc marc_indicators marc_repeatable_subfield |
| 9 |
|
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rec1 rec2 rec |
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regex prefix suffix surround |
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first lookup join_with |
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/; |
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|
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use warnings; |
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use strict; |
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|
| 18 |
#use base qw/WebPAC::Common/; |
| 19 |
use Data::Dump qw/dump/; |
| 20 |
use Encode qw/from_to/; |
| 21 |
|
| 22 |
# debugging warn(s) |
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my $debug = 0; |
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|
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|
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=head1 NAME |
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|
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WebPAC::Normalize - describe normalisaton rules using sets |
| 29 |
|
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=head1 VERSION |
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|
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Version 0.06 |
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|
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=cut |
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|
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our $VERSION = '0.06'; |
| 37 |
|
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=head1 SYNOPSIS |
| 39 |
|
| 40 |
This module uses C<conf/normalize/*.pl> files to perform normalisation |
| 41 |
from input records using perl functions which are specialized for set |
| 42 |
processing. |
| 43 |
|
| 44 |
Sets are implemented as arrays, and normalisation file is valid perl, which |
| 45 |
means that you check it's validity before running WebPAC using |
| 46 |
C<perl -c normalize.pl>. |
| 47 |
|
| 48 |
Normalisation can generate multiple output normalized data. For now, supported output |
| 49 |
types (on the left side of definition) are: C<tag>, C<display>, C<search> and |
| 50 |
C<marc>. |
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|
| 52 |
=head1 FUNCTIONS |
| 53 |
|
| 54 |
Functions which start with C<_> are private and used by WebPAC internally. |
| 55 |
All other functions are available for use within normalisation rules. |
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|
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=head2 data_structure |
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|
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Return data structure |
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|
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my $ds = WebPAC::Normalize::data_structure( |
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lookup => $lookup->lookup_hash, |
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row => $row, |
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rules => $normalize_pl_config, |
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marc_encoding => 'utf-8', |
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); |
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|
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Options C<lookup>, C<row>, C<rules> and C<log> are mandatory while all |
| 69 |
other are optional. |
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|
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This function will B<die> if normalizastion can't be evaled. |
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|
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Since this function isn't exported you have to call it with |
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C<WebPAC::Normalize::data_structure>. |
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|
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=cut |
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|
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sub data_structure { |
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my $arg = {@_}; |
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|
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die "need row argument" unless ($arg->{row}); |
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die "need normalisation argument" unless ($arg->{rules}); |
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|
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no strict 'subs'; |
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_set_lookup( $arg->{lookup} ); |
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_set_rec( $arg->{row} ); |
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_clean_ds( %{ $arg } ); |
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eval "$arg->{rules}"; |
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die "error evaling $arg->{rules}: $@\n" if ($@); |
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|
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return _get_ds(); |
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} |
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|
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=head2 _set_rec |
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|
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Set current record hash |
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|
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_set_rec( $rec ); |
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|
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=cut |
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|
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my $rec; |
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|
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sub _set_rec { |
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$rec = shift or die "no record hash"; |
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} |
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|
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=head2 _get_ds |
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|
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Return hash formatted as data structure |
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|
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my $ds = _get_ds(); |
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|
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=cut |
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|
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my ($out,$marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators); |
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|
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sub _get_ds { |
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return $out; |
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} |
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|
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=head2 _clean_ds |
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|
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Clean data structure hash for next record |
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|
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_clean_ds(); |
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|
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=cut |
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|
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sub _clean_ds { |
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my $a = {@_}; |
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($out,$marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators) = (); |
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$marc_encoding = $a->{marc_encoding}; |
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} |
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|
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=head2 _set_lookup |
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|
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Set current lookup hash |
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|
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_set_lookup( $lookup ); |
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|
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=cut |
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|
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my $lookup; |
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|
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sub _set_lookup { |
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$lookup = shift; |
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} |
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|
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=head2 _get_marc_fields |
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|
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Get all fields defined by calls to C<marc> |
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|
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$marc->add_fields( WebPAC::Normalize:_get_marc_fields() ); |
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|
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|
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|
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We are using I<magic> which detect repeatable fields only from |
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sequence of field/subfield data generated by normalization. |
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|
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Repeatable field is created if there is second occurence of same subfield or |
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if any of indicators are different. This is sane for most cases except for |
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non-repeatable fields with repeatable subfields. |
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|
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You can change behaviour of that using C<marc_repeatable_subfield>. |
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|
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=cut |
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|
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sub _get_marc_fields { |
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|
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|
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# first, sort all existing fields |
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# XXX might not be needed, but modern perl might randomize elements in hash |
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my @sorted_marc_record = sort { |
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$a->[0] . $a->[3] cmp $b->[0] . $b->[3] |
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} @{ $marc_record }; |
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|
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# output marc fields |
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my @m; |
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|
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# count unique field-subfields (used for offset when walking to next subfield) |
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my $u; |
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map { $u->{ $_->[0] . $_->[3] }++ } @sorted_marc_record; |
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|
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if ($debug) { |
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warn "## marc_repeatable_subfield ", dump( $marc_repeatable_subfield ), $/; |
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warn "## marc_record ", dump( $marc_record ), $/; |
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warn "## sorted_marc_record ", dump( \@sorted_marc_record ), $/; |
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warn "## subfield count ", dump( $u ), $/; |
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} |
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|
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my $len = $#sorted_marc_record; |
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my $visited; |
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my $i = 0; |
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my $field; |
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|
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foreach ( 0 .. $len ) { |
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|
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# find next element which isn't visited |
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while ($visited->{$i}) { |
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$i = ($i + 1) % ($len + 1); |
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} |
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|
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# mark it visited |
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$visited->{$i}++; |
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|
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my $row = $sorted_marc_record[$i]; |
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|
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# field and subfield which is key for |
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# marc_repeatable_subfield and u |
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my $fsf = $row->[0] . $row->[3]; |
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|
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if ($debug > 1) { |
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|
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print "### field so far [", $#$field, "] : ", dump( $field ), " ", $field ? 'T' : 'F', $/; |
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print "### this [$i]: ", dump( $row ),$/; |
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print "### sf: ", $row->[3], " vs ", $field->[3], |
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$marc_repeatable_subfield->{ $row->[0] . $row->[3] } ? ' (repeatable)' : '', $/, |
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if ($#$field >= 0); |
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|
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} |
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|
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# if field exists |
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if ( $#$field >= 0 ) { |
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if ( |
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$row->[0] ne $field->[0] || # field |
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$row->[1] ne $field->[1] || # i1 |
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$row->[2] ne $field->[2] # i2 |
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) { |
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push @m, $field; |
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warn "## saved/1 ", dump( $field ),$/ if ($debug); |
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$field = $row; |
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|
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} elsif ( |
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( $row->[3] lt $field->[-2] ) # subfield which is not next (e.g. a after c) |
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|| |
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( $row->[3] eq $field->[-2] && # same subfield, but not repeatable |
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! $marc_repeatable_subfield->{ $fsf } |
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) |
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) { |
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push @m, $field; |
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warn "## saved/2 ", dump( $field ),$/ if ($debug); |
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$field = $row; |
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|
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} else { |
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# append new subfields to existing field |
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push @$field, ( $row->[3], $row->[4] ); |
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} |
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} else { |
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# insert first field |
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$field = $row; |
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} |
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|
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if (! $marc_repeatable_subfield->{ $fsf }) { |
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# make step to next subfield |
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$i = ($i + $u->{ $fsf } ) % ($len + 1); |
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} |
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} |
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|
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if ($#$field >= 0) { |
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push @m, $field; |
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warn "## saved/3 ", dump( $field ),$/ if ($debug); |
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} |
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|
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return @m; |
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} |
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|
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=head1 Functions to create C<data_structure> |
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|
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Those functions generally have to first in your normalization file. |
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|
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=head2 tag |
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|
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Define new tag for I<search> and I<display>. |
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|
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tag('Title', rec('200','a') ); |
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|
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|
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=cut |
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|
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sub tag { |
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my $name = shift or die "tag needs name as first argument"; |
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my @o = grep { defined($_) && $_ ne '' } @_; |
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return unless (@o); |
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$out->{$name}->{tag} = $name; |
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$out->{$name}->{search} = \@o; |
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$out->{$name}->{display} = \@o; |
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} |
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|
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=head2 display |
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|
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Define tag just for I<display> |
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|
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@v = display('Title', rec('200','a') ); |
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|
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=cut |
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|
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sub display { |
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my $name = shift or die "display needs name as first argument"; |
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my @o = grep { defined($_) && $_ ne '' } @_; |
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return unless (@o); |
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$out->{$name}->{tag} = $name; |
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$out->{$name}->{display} = \@o; |
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} |
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|
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=head2 search |
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|
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Prepare values just for I<search> |
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|
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@v = search('Title', rec('200','a') ); |
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|
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=cut |
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|
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sub search { |
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my $name = shift or die "search needs name as first argument"; |
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my @o = grep { defined($_) && $_ ne '' } @_; |
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return unless (@o); |
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$out->{$name}->{tag} = $name; |
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$out->{$name}->{search} = \@o; |
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} |
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|
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=head2 marc |
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|
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Save value for MARC field |
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|
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marc('900','a', rec('200','a') ); |
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|
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=cut |
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|
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sub marc { |
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my $f = shift or die "marc needs field"; |
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die "marc field must be numer" unless ($f =~ /^\d+$/); |
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|
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my $sf = shift or die "marc needs subfield"; |
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|
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foreach (@_) { |
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my $v = $_; # make var read-write for Encode |
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next unless (defined($v) && $v !~ /^\s*$/); |
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from_to($v, 'iso-8859-2', $marc_encoding) if ($marc_encoding); |
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my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' '); |
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push @{ $marc_record }, [ $f, $i1, $i2, $sf => $v ]; |
| 342 |
} |
| 343 |
} |
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|
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=head2 marc_repeatable_subfield |
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|
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Save values for MARC repetable subfield |
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|
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marc_repeatable_subfield('910', 'z', rec('909') ); |
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|
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=cut |
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|
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sub marc_repeatable_subfield { |
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my ($f,$sf) = @_; |
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die "marc_repeatable_subfield need field and subfield!\n" unless ($f && $sf); |
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$marc_repeatable_subfield->{ $f . $sf }++; |
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marc(@_); |
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} |
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|
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=head2 marc_indicators |
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|
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Set both indicators for MARC field |
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|
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marc_indicators('900', ' ', 1); |
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|
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Any indicator value other than C<0-9> will be treated as undefined. |
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|
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=cut |
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|
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sub marc_indicators { |
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my $f = shift || die "marc_indicators need field!\n"; |
| 372 |
my ($i1,$i2) = @_; |
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die "marc_indicators($f, ...) need i1!\n" unless(defined($i1)); |
| 374 |
die "marc_indicators($f, $i1, ...) need i2!\n" unless(defined($i2)); |
| 375 |
|
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$i1 = ' ' if ($i1 !~ /^\d$/); |
| 377 |
$i2 = ' ' if ($i2 !~ /^\d$/); |
| 378 |
@{ $marc_indicators->{$f} } = ($i1,$i2); |
| 379 |
} |
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|
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|
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=head1 Functions to extract data from input |
| 383 |
|
| 384 |
This function should be used inside functions to create C<data_structure> described |
| 385 |
above. |
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|
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=head2 rec1 |
| 388 |
|
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Return all values in some field |
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|
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@v = rec1('200') |
| 392 |
|
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TODO: order of values is probably same as in source data, need to investigate that |
| 394 |
|
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=cut |
| 396 |
|
| 397 |
sub rec1 { |
| 398 |
my $f = shift; |
| 399 |
return unless (defined($rec) && defined($rec->{$f})); |
| 400 |
if (ref($rec->{$f}) eq 'ARRAY') { |
| 401 |
return map { |
| 402 |
if (ref($_) eq 'HASH') { |
| 403 |
values %{$_}; |
| 404 |
} else { |
| 405 |
$_; |
| 406 |
} |
| 407 |
} @{ $rec->{$f} }; |
| 408 |
} elsif( defined($rec->{$f}) ) { |
| 409 |
return $rec->{$f}; |
| 410 |
} |
| 411 |
} |
| 412 |
|
| 413 |
=head2 rec2 |
| 414 |
|
| 415 |
Return all values in specific field and subfield |
| 416 |
|
| 417 |
@v = rec2('200','a') |
| 418 |
|
| 419 |
=cut |
| 420 |
|
| 421 |
sub rec2 { |
| 422 |
my $f = shift; |
| 423 |
return unless (defined($rec && $rec->{$f})); |
| 424 |
my $sf = shift; |
| 425 |
return map { $_->{$sf} } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} }; |
| 426 |
} |
| 427 |
|
| 428 |
=head2 rec |
| 429 |
|
| 430 |
syntaxtic sugar for |
| 431 |
|
| 432 |
@v = rec('200') |
| 433 |
@v = rec('200','a') |
| 434 |
|
| 435 |
=cut |
| 436 |
|
| 437 |
sub rec { |
| 438 |
if ($#_ == 0) { |
| 439 |
return rec1(@_); |
| 440 |
} elsif ($#_ == 1) { |
| 441 |
return rec2(@_); |
| 442 |
} |
| 443 |
} |
| 444 |
|
| 445 |
=head2 regex |
| 446 |
|
| 447 |
Apply regex to some or all values |
| 448 |
|
| 449 |
@v = regex( 's/foo/bar/g', @v ); |
| 450 |
|
| 451 |
=cut |
| 452 |
|
| 453 |
sub regex { |
| 454 |
my $r = shift; |
| 455 |
my @out; |
| 456 |
#warn "r: $r\n", dump(\@_); |
| 457 |
foreach my $t (@_) { |
| 458 |
next unless ($t); |
| 459 |
eval "\$t =~ $r"; |
| 460 |
push @out, $t if ($t && $t ne ''); |
| 461 |
} |
| 462 |
return @out; |
| 463 |
} |
| 464 |
|
| 465 |
=head2 prefix |
| 466 |
|
| 467 |
Prefix all values with a string |
| 468 |
|
| 469 |
@v = prefix( 'my_', @v ); |
| 470 |
|
| 471 |
=cut |
| 472 |
|
| 473 |
sub prefix { |
| 474 |
my $p = shift or die "prefix needs string as first argument"; |
| 475 |
return map { $p . $_ } grep { defined($_) } @_; |
| 476 |
} |
| 477 |
|
| 478 |
=head2 suffix |
| 479 |
|
| 480 |
suffix all values with a string |
| 481 |
|
| 482 |
@v = suffix( '_my', @v ); |
| 483 |
|
| 484 |
=cut |
| 485 |
|
| 486 |
sub suffix { |
| 487 |
my $s = shift or die "suffix needs string as first argument"; |
| 488 |
return map { $_ . $s } grep { defined($_) } @_; |
| 489 |
} |
| 490 |
|
| 491 |
=head2 surround |
| 492 |
|
| 493 |
surround all values with a two strings |
| 494 |
|
| 495 |
@v = surround( 'prefix_', '_suffix', @v ); |
| 496 |
|
| 497 |
=cut |
| 498 |
|
| 499 |
sub surround { |
| 500 |
my $p = shift or die "surround need prefix as first argument"; |
| 501 |
my $s = shift or die "surround needs suffix as second argument"; |
| 502 |
return map { $p . $_ . $s } grep { defined($_) } @_; |
| 503 |
} |
| 504 |
|
| 505 |
=head2 first |
| 506 |
|
| 507 |
Return first element |
| 508 |
|
| 509 |
$v = first( @v ); |
| 510 |
|
| 511 |
=cut |
| 512 |
|
| 513 |
sub first { |
| 514 |
my $r = shift; |
| 515 |
return $r; |
| 516 |
} |
| 517 |
|
| 518 |
=head2 lookup |
| 519 |
|
| 520 |
Consult lookup hashes for some value |
| 521 |
|
| 522 |
@v = lookup( $v ); |
| 523 |
@v = lookup( @v ); |
| 524 |
|
| 525 |
=cut |
| 526 |
|
| 527 |
sub lookup { |
| 528 |
my $k = shift or return; |
| 529 |
return unless (defined($lookup->{$k})); |
| 530 |
if (ref($lookup->{$k}) eq 'ARRAY') { |
| 531 |
return @{ $lookup->{$k} }; |
| 532 |
} else { |
| 533 |
return $lookup->{$k}; |
| 534 |
} |
| 535 |
} |
| 536 |
|
| 537 |
=head2 join_with |
| 538 |
|
| 539 |
Joins walues with some delimiter |
| 540 |
|
| 541 |
$v = join_with(", ", @v); |
| 542 |
|
| 543 |
=cut |
| 544 |
|
| 545 |
sub join_with { |
| 546 |
my $d = shift; |
| 547 |
return join($d, grep { defined($_) && $_ ne '' } @_); |
| 548 |
} |
| 549 |
|
| 550 |
# END |
| 551 |
1; |
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