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package WebPAC::Normalize; |
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use Exporter 'import'; |
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@EXPORT = qw/ |
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_set_rec _set_lookup |
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_get_ds _clean_ds |
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_debug |
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tag search display |
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marc marc_indicators marc_repeatable_subfield |
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marc_compose |
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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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split_rec_on |
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/; |
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use warnings; |
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use strict; |
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#use base qw/WebPAC::Common/; |
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use Data::Dump qw/dump/; |
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use Encode qw/from_to/; |
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# debugging warn(s) |
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my $debug = 0; |
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=head1 NAME |
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WebPAC::Normalize - describe normalisaton rules using sets |
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=head1 VERSION |
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Version 0.08 |
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=cut |
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our $VERSION = '0.08'; |
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=head1 SYNOPSIS |
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This module uses C<conf/normalize/*.pl> files to perform normalisation |
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from input records using perl functions which are specialized for set |
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processing. |
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Sets are implemented as arrays, and normalisation file is valid perl, which |
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means that you check it's validity before running WebPAC using |
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C<perl -c normalize.pl>. |
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Normalisation can generate multiple output normalized data. For now, supported output |
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types (on the left side of definition) are: C<tag>, C<display>, C<search> and |
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C<marc>. |
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=head1 FUNCTIONS |
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Functions which start with C<_> are private and used by WebPAC internally. |
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All other functions are available for use within normalisation rules. |
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=head2 data_structure |
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Return data structure |
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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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Options C<lookup>, C<row>, C<rules> and C<log> are mandatory while all |
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other are optional. |
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This function will B<die> if normalizastion can't be evaled. |
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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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=cut |
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sub data_structure { |
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my $arg = {@_}; |
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die "need row argument" unless ($arg->{row}); |
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die "need normalisation argument" unless ($arg->{rules}); |
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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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return _get_ds(); |
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} |
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=head2 _set_rec |
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Set current record hash |
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_set_rec( $rec ); |
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=cut |
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my $rec; |
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sub _set_rec { |
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$rec = shift or die "no record hash"; |
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} |
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=head2 _get_ds |
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Return hash formatted as data structure |
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my $ds = _get_ds(); |
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=cut |
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my ($out,$marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators); |
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sub _get_ds { |
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return $out; |
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} |
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=head2 _clean_ds |
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Clean data structure hash for next record |
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_clean_ds(); |
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=cut |
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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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=head2 _set_lookup |
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Set current lookup hash |
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_set_lookup( $lookup ); |
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=cut |
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my $lookup; |
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sub _set_lookup { |
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$lookup = shift; |
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} |
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=head2 _get_marc_fields |
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Get all fields defined by calls to C<marc> |
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$marc->add_fields( WebPAC::Normalize:_get_marc_fields() ); |
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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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Repeatable field is created when there is second occurence of same subfield or |
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if any of indicators are different. |
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This is sane for most cases. Something like: |
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900a-1 900b-1 900c-1 |
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900a-2 900b-2 |
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900a-3 |
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will be created from any combination of: |
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900a-1 900a-2 900a-3 900b-1 900b-2 900c-1 |
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and following rules: |
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marc('900','a', rec('200','a') ); |
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marc('900','b', rec('200','b') ); |
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marc('900','c', rec('200','c') ); |
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which might not be what you have in mind. If you need repeatable subfield, |
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define it using C<marc_repeatable_subfield> like this: |
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.... |
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=cut |
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sub _get_marc_fields { |
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return if (! $marc_record || ref($marc_record) ne 'ARRAY' || $#{ $marc_record } < 0); |
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# first, sort all existing fields |
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# XXX might not be needed, but modern perl might randomize elements in hash |
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my @sorted_marc_record = sort { |
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$a->[0] . $a->[3] cmp $b->[0] . $b->[3] |
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} @{ $marc_record }; |
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@sorted_marc_record = @{ $marc_record }; ### FIXME disable sorting |
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# output marc fields |
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my @m; |
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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] . $_->[3] }++ } @sorted_marc_record; |
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if ($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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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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foreach ( 0 .. $len ) { |
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# find next element which isn't visited |
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while ($visited->{$i}) { |
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$i = ($i + 1) % ($len + 1); |
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} |
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# mark it visited |
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$visited->{$i}++; |
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my $row = $sorted_marc_record[$i]; |
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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] . $row->[3]; |
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if ($debug > 1) { |
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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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# 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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} 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 = $row; |
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} else { |
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# append new subfields to existing field |
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push @$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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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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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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return @m; |
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} |
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=head2 _debug |
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Change level of debug warnings |
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_debug( 2 ); |
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=cut |
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sub _debug { |
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my $l = shift; |
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return $debug unless defined($l); |
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warn "debug level $l" if ($l > 0); |
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$debug = $l; |
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} |
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=head1 Functions to create C<data_structure> |
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Those functions generally have to first in your normalization file. |
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=head2 tag |
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Define new tag for I<search> and I<display>. |
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tag('Title', rec('200','a') ); |
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=cut |
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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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=head2 display |
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Define tag just for I<display> |
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@v = display('Title', rec('200','a') ); |
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=cut |
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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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=head2 search |
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Prepare values just for I<search> |
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@v = search('Title', rec('200','a') ); |
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=cut |
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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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=head2 marc |
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Save value for MARC field |
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marc('900','a', rec('200','a') ); |
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=cut |
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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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my $sf = shift or die "marc needs subfield"; |
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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 => $v ]; |
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} |
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} |
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=head2 marc_repeatable_subfield |
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Save values for MARC repetable subfield |
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|
|
marc_repeatable_subfield('910', 'z', rec('909') ); |
388 |
|
|
|
389 |
|
|
=cut |
390 |
|
|
|
391 |
|
|
sub marc_repeatable_subfield { |
392 |
dpavlin |
550 |
my ($f,$sf) = @_; |
393 |
|
|
die "marc_repeatable_subfield need field and subfield!\n" unless ($f && $sf); |
394 |
|
|
$marc_repeatable_subfield->{ $f . $sf }++; |
395 |
dpavlin |
547 |
marc(@_); |
396 |
|
|
} |
397 |
|
|
|
398 |
|
|
=head2 marc_indicators |
399 |
|
|
|
400 |
|
|
Set both indicators for MARC field |
401 |
|
|
|
402 |
|
|
marc_indicators('900', ' ', 1); |
403 |
|
|
|
404 |
|
|
Any indicator value other than C<0-9> will be treated as undefined. |
405 |
|
|
|
406 |
|
|
=cut |
407 |
|
|
|
408 |
|
|
sub marc_indicators { |
409 |
|
|
my $f = shift || die "marc_indicators need field!\n"; |
410 |
|
|
my ($i1,$i2) = @_; |
411 |
|
|
die "marc_indicators($f, ...) need i1!\n" unless(defined($i1)); |
412 |
|
|
die "marc_indicators($f, $i1, ...) need i2!\n" unless(defined($i2)); |
413 |
|
|
|
414 |
|
|
$i1 = ' ' if ($i1 !~ /^\d$/); |
415 |
|
|
$i2 = ' ' if ($i2 !~ /^\d$/); |
416 |
dpavlin |
548 |
@{ $marc_indicators->{$f} } = ($i1,$i2); |
417 |
dpavlin |
547 |
} |
418 |
|
|
|
419 |
dpavlin |
562 |
=head2 marc_compose |
420 |
dpavlin |
547 |
|
421 |
dpavlin |
562 |
Save values for each MARC subfield explicitly |
422 |
|
|
|
423 |
|
|
marc_compose('900', |
424 |
|
|
'a', rec('200','a') |
425 |
|
|
'b', rec('201','a') |
426 |
|
|
'a', rec('200','b') |
427 |
|
|
'c', rec('200','c') |
428 |
|
|
); |
429 |
|
|
|
430 |
|
|
=cut |
431 |
|
|
|
432 |
|
|
sub marc_compose { |
433 |
|
|
my $f = shift or die "marc_compose needs field"; |
434 |
|
|
die "marc_compose field must be numer" unless ($f =~ /^\d+$/); |
435 |
|
|
|
436 |
|
|
my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' '); |
437 |
|
|
my $m = [ $f, $i1, $i2 ]; |
438 |
|
|
|
439 |
|
|
while (@_) { |
440 |
|
|
my $sf = shift or die "marc_compose $f needs subfield"; |
441 |
|
|
my $v = shift or die "marc_compose $f needs value for subfield $sf"; |
442 |
|
|
|
443 |
|
|
next unless (defined($v) && $v !~ /^\s*$/); |
444 |
|
|
from_to($v, 'iso-8859-2', $marc_encoding) if ($marc_encoding); |
445 |
|
|
push @$m, ( $sf, $v ); |
446 |
|
|
warn "## ++ marc_compose($f,$sf,$v) ", dump( $m ) if ($debug > 1); |
447 |
|
|
} |
448 |
|
|
|
449 |
|
|
warn "## marc_compose(d) ", dump( $m ) if ($debug > 1); |
450 |
|
|
|
451 |
|
|
push @{ $marc_record }, $m; |
452 |
|
|
} |
453 |
|
|
|
454 |
|
|
|
455 |
dpavlin |
540 |
=head1 Functions to extract data from input |
456 |
|
|
|
457 |
|
|
This function should be used inside functions to create C<data_structure> described |
458 |
|
|
above. |
459 |
|
|
|
460 |
dpavlin |
536 |
=head2 rec1 |
461 |
dpavlin |
371 |
|
462 |
dpavlin |
536 |
Return all values in some field |
463 |
dpavlin |
371 |
|
464 |
dpavlin |
536 |
@v = rec1('200') |
465 |
dpavlin |
15 |
|
466 |
dpavlin |
536 |
TODO: order of values is probably same as in source data, need to investigate that |
467 |
dpavlin |
15 |
|
468 |
dpavlin |
536 |
=cut |
469 |
dpavlin |
15 |
|
470 |
dpavlin |
536 |
sub rec1 { |
471 |
|
|
my $f = shift; |
472 |
|
|
return unless (defined($rec) && defined($rec->{$f})); |
473 |
|
|
if (ref($rec->{$f}) eq 'ARRAY') { |
474 |
|
|
return map { |
475 |
|
|
if (ref($_) eq 'HASH') { |
476 |
|
|
values %{$_}; |
477 |
dpavlin |
31 |
} else { |
478 |
dpavlin |
536 |
$_; |
479 |
dpavlin |
31 |
} |
480 |
dpavlin |
536 |
} @{ $rec->{$f} }; |
481 |
|
|
} elsif( defined($rec->{$f}) ) { |
482 |
|
|
return $rec->{$f}; |
483 |
dpavlin |
15 |
} |
484 |
|
|
} |
485 |
|
|
|
486 |
dpavlin |
536 |
=head2 rec2 |
487 |
dpavlin |
15 |
|
488 |
dpavlin |
536 |
Return all values in specific field and subfield |
489 |
dpavlin |
13 |
|
490 |
dpavlin |
536 |
@v = rec2('200','a') |
491 |
dpavlin |
13 |
|
492 |
|
|
=cut |
493 |
|
|
|
494 |
dpavlin |
536 |
sub rec2 { |
495 |
|
|
my $f = shift; |
496 |
|
|
return unless (defined($rec && $rec->{$f})); |
497 |
|
|
my $sf = shift; |
498 |
|
|
return map { $_->{$sf} } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} }; |
499 |
|
|
} |
500 |
dpavlin |
13 |
|
501 |
dpavlin |
536 |
=head2 rec |
502 |
dpavlin |
13 |
|
503 |
dpavlin |
536 |
syntaxtic sugar for |
504 |
dpavlin |
13 |
|
505 |
dpavlin |
536 |
@v = rec('200') |
506 |
|
|
@v = rec('200','a') |
507 |
dpavlin |
13 |
|
508 |
dpavlin |
536 |
=cut |
509 |
dpavlin |
373 |
|
510 |
dpavlin |
536 |
sub rec { |
511 |
|
|
if ($#_ == 0) { |
512 |
|
|
return rec1(@_); |
513 |
|
|
} elsif ($#_ == 1) { |
514 |
|
|
return rec2(@_); |
515 |
dpavlin |
13 |
} |
516 |
|
|
} |
517 |
|
|
|
518 |
dpavlin |
536 |
=head2 regex |
519 |
dpavlin |
15 |
|
520 |
dpavlin |
536 |
Apply regex to some or all values |
521 |
dpavlin |
15 |
|
522 |
dpavlin |
536 |
@v = regex( 's/foo/bar/g', @v ); |
523 |
dpavlin |
15 |
|
524 |
|
|
=cut |
525 |
|
|
|
526 |
dpavlin |
536 |
sub regex { |
527 |
|
|
my $r = shift; |
528 |
|
|
my @out; |
529 |
dpavlin |
550 |
#warn "r: $r\n", dump(\@_); |
530 |
dpavlin |
536 |
foreach my $t (@_) { |
531 |
|
|
next unless ($t); |
532 |
|
|
eval "\$t =~ $r"; |
533 |
|
|
push @out, $t if ($t && $t ne ''); |
534 |
dpavlin |
368 |
} |
535 |
dpavlin |
536 |
return @out; |
536 |
dpavlin |
15 |
} |
537 |
|
|
|
538 |
dpavlin |
536 |
=head2 prefix |
539 |
dpavlin |
15 |
|
540 |
dpavlin |
536 |
Prefix all values with a string |
541 |
dpavlin |
15 |
|
542 |
dpavlin |
536 |
@v = prefix( 'my_', @v ); |
543 |
dpavlin |
15 |
|
544 |
|
|
=cut |
545 |
|
|
|
546 |
dpavlin |
536 |
sub prefix { |
547 |
|
|
my $p = shift or die "prefix needs string as first argument"; |
548 |
|
|
return map { $p . $_ } grep { defined($_) } @_; |
549 |
|
|
} |
550 |
dpavlin |
15 |
|
551 |
dpavlin |
536 |
=head2 suffix |
552 |
dpavlin |
15 |
|
553 |
dpavlin |
536 |
suffix all values with a string |
554 |
dpavlin |
15 |
|
555 |
dpavlin |
536 |
@v = suffix( '_my', @v ); |
556 |
dpavlin |
15 |
|
557 |
dpavlin |
536 |
=cut |
558 |
dpavlin |
15 |
|
559 |
dpavlin |
536 |
sub suffix { |
560 |
|
|
my $s = shift or die "suffix needs string as first argument"; |
561 |
|
|
return map { $_ . $s } grep { defined($_) } @_; |
562 |
dpavlin |
15 |
} |
563 |
|
|
|
564 |
dpavlin |
536 |
=head2 surround |
565 |
dpavlin |
13 |
|
566 |
dpavlin |
536 |
surround all values with a two strings |
567 |
dpavlin |
13 |
|
568 |
dpavlin |
536 |
@v = surround( 'prefix_', '_suffix', @v ); |
569 |
dpavlin |
13 |
|
570 |
|
|
=cut |
571 |
|
|
|
572 |
dpavlin |
536 |
sub surround { |
573 |
|
|
my $p = shift or die "surround need prefix as first argument"; |
574 |
|
|
my $s = shift or die "surround needs suffix as second argument"; |
575 |
|
|
return map { $p . $_ . $s } grep { defined($_) } @_; |
576 |
dpavlin |
13 |
} |
577 |
|
|
|
578 |
dpavlin |
536 |
=head2 first |
579 |
dpavlin |
13 |
|
580 |
dpavlin |
536 |
Return first element |
581 |
dpavlin |
15 |
|
582 |
dpavlin |
536 |
$v = first( @v ); |
583 |
dpavlin |
13 |
|
584 |
|
|
=cut |
585 |
|
|
|
586 |
dpavlin |
536 |
sub first { |
587 |
|
|
my $r = shift; |
588 |
|
|
return $r; |
589 |
dpavlin |
13 |
} |
590 |
|
|
|
591 |
dpavlin |
536 |
=head2 lookup |
592 |
dpavlin |
13 |
|
593 |
dpavlin |
536 |
Consult lookup hashes for some value |
594 |
dpavlin |
13 |
|
595 |
dpavlin |
536 |
@v = lookup( $v ); |
596 |
|
|
@v = lookup( @v ); |
597 |
dpavlin |
13 |
|
598 |
|
|
=cut |
599 |
|
|
|
600 |
dpavlin |
536 |
sub lookup { |
601 |
|
|
my $k = shift or return; |
602 |
|
|
return unless (defined($lookup->{$k})); |
603 |
|
|
if (ref($lookup->{$k}) eq 'ARRAY') { |
604 |
|
|
return @{ $lookup->{$k} }; |
605 |
|
|
} else { |
606 |
|
|
return $lookup->{$k}; |
607 |
|
|
} |
608 |
dpavlin |
13 |
} |
609 |
|
|
|
610 |
dpavlin |
536 |
=head2 join_with |
611 |
dpavlin |
13 |
|
612 |
dpavlin |
536 |
Joins walues with some delimiter |
613 |
dpavlin |
10 |
|
614 |
dpavlin |
536 |
$v = join_with(", ", @v); |
615 |
dpavlin |
10 |
|
616 |
dpavlin |
536 |
=cut |
617 |
dpavlin |
10 |
|
618 |
dpavlin |
536 |
sub join_with { |
619 |
|
|
my $d = shift; |
620 |
|
|
return join($d, grep { defined($_) && $_ ne '' } @_); |
621 |
|
|
} |
622 |
dpavlin |
10 |
|
623 |
dpavlin |
562 |
=head2 split_rec_on |
624 |
|
|
|
625 |
|
|
Split record subfield on some regex and take one of parts out |
626 |
|
|
|
627 |
|
|
$a_before_semi_column = |
628 |
|
|
split_rec_on('200','a', /\s*;\s*/, $part); |
629 |
|
|
|
630 |
|
|
C<$part> is optional number of element. First element is |
631 |
|
|
B<1>, not 0! |
632 |
|
|
|
633 |
|
|
If there is no C<$part> parameter or C<$part> is 0, this function will |
634 |
|
|
return all values produced by splitting. |
635 |
|
|
|
636 |
|
|
=cut |
637 |
|
|
|
638 |
|
|
sub split_rec_on { |
639 |
|
|
die "split_rec_on need (fld,sf,regex[,part]" if ($#_ < 2); |
640 |
|
|
|
641 |
|
|
my ($fld, $sf, $regex, $part) = @_; |
642 |
|
|
warn "### regex ", ref($regex), $regex if ($debug > 2); |
643 |
|
|
|
644 |
|
|
my @r = rec( $fld, $sf ); |
645 |
|
|
my $v = shift @r; |
646 |
|
|
warn "### first rec($fld,$sf) = ",dump($v) if ($debug > 2); |
647 |
|
|
|
648 |
|
|
my @s = split( $regex, $v ); |
649 |
|
|
warn "## split_rec_on($fld,$sf,$regex,$part) = ",dump(@s) if ($debug > 1); |
650 |
|
|
if ($part > 0) { |
651 |
|
|
return $s[ $part - 1 ]; |
652 |
|
|
} else { |
653 |
|
|
return @s; |
654 |
|
|
} |
655 |
|
|
} |
656 |
|
|
|
657 |
dpavlin |
536 |
# END |
658 |
|
|
1; |