| 1 |
package WebPAC::Normalize; |
| 2 |
use Exporter 'import'; |
| 3 |
@EXPORT = qw/ |
| 4 |
_set_rec _set_lookup |
| 5 |
_get_ds _clean_ds |
| 6 |
_debug |
| 7 |
|
| 8 |
tag search display |
| 9 |
marc marc_indicators marc_repeatable_subfield |
| 10 |
marc_compose |
| 11 |
|
| 12 |
rec1 rec2 rec |
| 13 |
regex prefix suffix surround |
| 14 |
first lookup join_with |
| 15 |
|
| 16 |
split_rec_on |
| 17 |
/; |
| 18 |
|
| 19 |
use warnings; |
| 20 |
use strict; |
| 21 |
|
| 22 |
#use base qw/WebPAC::Common/; |
| 23 |
use Data::Dump qw/dump/; |
| 24 |
use Encode qw/from_to/; |
| 25 |
|
| 26 |
# debugging warn(s) |
| 27 |
my $debug = 0; |
| 28 |
|
| 29 |
|
| 30 |
=head1 NAME |
| 31 |
|
| 32 |
WebPAC::Normalize - describe normalisaton rules using sets |
| 33 |
|
| 34 |
=head1 VERSION |
| 35 |
|
| 36 |
Version 0.08 |
| 37 |
|
| 38 |
=cut |
| 39 |
|
| 40 |
our $VERSION = '0.08'; |
| 41 |
|
| 42 |
=head1 SYNOPSIS |
| 43 |
|
| 44 |
This module uses C<conf/normalize/*.pl> files to perform normalisation |
| 45 |
from input records using perl functions which are specialized for set |
| 46 |
processing. |
| 47 |
|
| 48 |
Sets are implemented as arrays, and normalisation file is valid perl, which |
| 49 |
means that you check it's validity before running WebPAC using |
| 50 |
C<perl -c normalize.pl>. |
| 51 |
|
| 52 |
Normalisation can generate multiple output normalized data. For now, supported output |
| 53 |
types (on the left side of definition) are: C<tag>, C<display>, C<search> and |
| 54 |
C<marc>. |
| 55 |
|
| 56 |
=head1 FUNCTIONS |
| 57 |
|
| 58 |
Functions which start with C<_> are private and used by WebPAC internally. |
| 59 |
All other functions are available for use within normalisation rules. |
| 60 |
|
| 61 |
=head2 data_structure |
| 62 |
|
| 63 |
Return data structure |
| 64 |
|
| 65 |
my $ds = WebPAC::Normalize::data_structure( |
| 66 |
lookup => $lookup->lookup_hash, |
| 67 |
row => $row, |
| 68 |
rules => $normalize_pl_config, |
| 69 |
marc_encoding => 'utf-8', |
| 70 |
); |
| 71 |
|
| 72 |
Options C<lookup>, C<row>, C<rules> and C<log> are mandatory while all |
| 73 |
other are optional. |
| 74 |
|
| 75 |
This function will B<die> if normalizastion can't be evaled. |
| 76 |
|
| 77 |
Since this function isn't exported you have to call it with |
| 78 |
C<WebPAC::Normalize::data_structure>. |
| 79 |
|
| 80 |
=cut |
| 81 |
|
| 82 |
sub data_structure { |
| 83 |
my $arg = {@_}; |
| 84 |
|
| 85 |
die "need row argument" unless ($arg->{row}); |
| 86 |
die "need normalisation argument" unless ($arg->{rules}); |
| 87 |
|
| 88 |
no strict 'subs'; |
| 89 |
_set_lookup( $arg->{lookup} ); |
| 90 |
_set_rec( $arg->{row} ); |
| 91 |
_clean_ds( %{ $arg } ); |
| 92 |
eval "$arg->{rules}"; |
| 93 |
die "error evaling $arg->{rules}: $@\n" if ($@); |
| 94 |
|
| 95 |
return _get_ds(); |
| 96 |
} |
| 97 |
|
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=head2 _set_rec |
| 99 |
|
| 100 |
Set current record hash |
| 101 |
|
| 102 |
_set_rec( $rec ); |
| 103 |
|
| 104 |
=cut |
| 105 |
|
| 106 |
my $rec; |
| 107 |
|
| 108 |
sub _set_rec { |
| 109 |
$rec = shift or die "no record hash"; |
| 110 |
} |
| 111 |
|
| 112 |
=head2 _get_ds |
| 113 |
|
| 114 |
Return hash formatted as data structure |
| 115 |
|
| 116 |
my $ds = _get_ds(); |
| 117 |
|
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=cut |
| 119 |
|
| 120 |
my ($out,$marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators); |
| 121 |
|
| 122 |
sub _get_ds { |
| 123 |
return $out; |
| 124 |
} |
| 125 |
|
| 126 |
=head2 _clean_ds |
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|
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Clean data structure hash for next record |
| 129 |
|
| 130 |
_clean_ds(); |
| 131 |
|
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=cut |
| 133 |
|
| 134 |
sub _clean_ds { |
| 135 |
my $a = {@_}; |
| 136 |
($out,$marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators) = (); |
| 137 |
$marc_encoding = $a->{marc_encoding}; |
| 138 |
} |
| 139 |
|
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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; |
| 149 |
|
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sub _set_lookup { |
| 151 |
$lookup = shift; |
| 152 |
} |
| 153 |
|
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=head2 _get_marc_fields |
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|
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Get all fields defined by calls to C<marc> |
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|
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$marc->add_fields( WebPAC::Normalize:_get_marc_fields() ); |
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|
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We are using I<magic> which detect repeatable fields only from |
| 161 |
sequence of field/subfield data generated by normalization. |
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|
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Repeatable field is created when there is second occurence of same subfield or |
| 164 |
if any of indicators are different. |
| 165 |
|
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This is sane for most cases. Something like: |
| 167 |
|
| 168 |
900a-1 900b-1 900c-1 |
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900a-2 900b-2 |
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900a-3 |
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|
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will be created from any combination of: |
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|
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900a-1 900a-2 900a-3 900b-1 900b-2 900c-1 |
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|
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and following rules: |
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|
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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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|
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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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.... |
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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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return if (! $marc_record || ref($marc_record) ne 'ARRAY' || $#{ $marc_record } < 0); |
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|
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# first, sort all existing fields |
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# XXX might not be needed, but modern perl might randomize elements in hash |
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my @sorted_marc_record = sort { |
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$a->[0] . $a->[3] cmp $b->[0] . $b->[3] |
| 197 |
} @{ $marc_record }; |
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|
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@sorted_marc_record = @{ $marc_record }; ### FIXME disable sorting |
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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] . $_->[3] }++ } @sorted_marc_record; |
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|
| 208 |
if ($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 .. $len ) { |
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|
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# find next element which isn't visited |
| 223 |
while ($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 |
| 233 |
# marc_repeatable_subfield and u |
| 234 |
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 |
| 261 |
! $marc_repeatable_subfield->{ $fsf } |
| 262 |
) |
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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], $row->[4] ); |
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} |
| 272 |
} else { |
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# insert first field |
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$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 |
| 279 |
$i = ($i + $u->{ $fsf } ) % ($len + 1); |
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} |
| 281 |
} |
| 282 |
|
| 283 |
if ($#$field >= 0) { |
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push @m, $field; |
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warn "## saved/3 ", dump( $field ),$/ if ($debug); |
| 286 |
} |
| 287 |
|
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return @m; |
| 289 |
} |
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|
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=head2 _debug |
| 292 |
|
| 293 |
Change level of debug warnings |
| 294 |
|
| 295 |
_debug( 2 ); |
| 296 |
|
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=cut |
| 298 |
|
| 299 |
sub _debug { |
| 300 |
my $l = shift; |
| 301 |
return $debug unless defined($l); |
| 302 |
warn "debug level $l" if ($l > 0); |
| 303 |
$debug = $l; |
| 304 |
} |
| 305 |
|
| 306 |
=head1 Functions to create C<data_structure> |
| 307 |
|
| 308 |
Those functions generally have to first in your normalization file. |
| 309 |
|
| 310 |
=head2 tag |
| 311 |
|
| 312 |
Define new tag for I<search> and I<display>. |
| 313 |
|
| 314 |
tag('Title', rec('200','a') ); |
| 315 |
|
| 316 |
|
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=cut |
| 318 |
|
| 319 |
sub tag { |
| 320 |
my $name = shift or die "tag needs name as first argument"; |
| 321 |
my @o = grep { defined($_) && $_ ne '' } @_; |
| 322 |
return unless (@o); |
| 323 |
$out->{$name}->{tag} = $name; |
| 324 |
$out->{$name}->{search} = \@o; |
| 325 |
$out->{$name}->{display} = \@o; |
| 326 |
} |
| 327 |
|
| 328 |
=head2 display |
| 329 |
|
| 330 |
Define tag just for I<display> |
| 331 |
|
| 332 |
@v = display('Title', rec('200','a') ); |
| 333 |
|
| 334 |
=cut |
| 335 |
|
| 336 |
sub display { |
| 337 |
my $name = shift or die "display needs name as first argument"; |
| 338 |
my @o = grep { defined($_) && $_ ne '' } @_; |
| 339 |
return unless (@o); |
| 340 |
$out->{$name}->{tag} = $name; |
| 341 |
$out->{$name}->{display} = \@o; |
| 342 |
} |
| 343 |
|
| 344 |
=head2 search |
| 345 |
|
| 346 |
Prepare values just for I<search> |
| 347 |
|
| 348 |
@v = search('Title', rec('200','a') ); |
| 349 |
|
| 350 |
=cut |
| 351 |
|
| 352 |
sub search { |
| 353 |
my $name = shift or die "search needs name as first argument"; |
| 354 |
my @o = grep { defined($_) && $_ ne '' } @_; |
| 355 |
return unless (@o); |
| 356 |
$out->{$name}->{tag} = $name; |
| 357 |
$out->{$name}->{search} = \@o; |
| 358 |
} |
| 359 |
|
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=head2 marc |
| 361 |
|
| 362 |
Save value for MARC field |
| 363 |
|
| 364 |
marc('900','a', rec('200','a') ); |
| 365 |
|
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=cut |
| 367 |
|
| 368 |
sub marc { |
| 369 |
my $f = shift or die "marc needs field"; |
| 370 |
die "marc field must be numer" unless ($f =~ /^\d+$/); |
| 371 |
|
| 372 |
my $sf = shift or die "marc needs subfield"; |
| 373 |
|
| 374 |
foreach (@_) { |
| 375 |
my $v = $_; # make var read-write for Encode |
| 376 |
next unless (defined($v) && $v !~ /^\s*$/); |
| 377 |
from_to($v, 'iso-8859-2', $marc_encoding) if ($marc_encoding); |
| 378 |
my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' '); |
| 379 |
push @{ $marc_record }, [ $f, $i1, $i2, $sf => $v ]; |
| 380 |
} |
| 381 |
} |
| 382 |
|
| 383 |
=head2 marc_repeatable_subfield |
| 384 |
|
| 385 |
Save values for MARC repetable subfield |
| 386 |
|
| 387 |
marc_repeatable_subfield('910', 'z', rec('909') ); |
| 388 |
|
| 389 |
=cut |
| 390 |
|
| 391 |
sub marc_repeatable_subfield { |
| 392 |
my ($f,$sf) = @_; |
| 393 |
die "marc_repeatable_subfield need field and subfield!\n" unless ($f && $sf); |
| 394 |
$marc_repeatable_subfield->{ $f . $sf }++; |
| 395 |
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 |
@{ $marc_indicators->{$f} } = ($i1,$i2); |
| 417 |
} |
| 418 |
|
| 419 |
=head2 marc_compose |
| 420 |
|
| 421 |
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 |
=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 |
=head2 rec1 |
| 461 |
|
| 462 |
Return all values in some field |
| 463 |
|
| 464 |
@v = rec1('200') |
| 465 |
|
| 466 |
TODO: order of values is probably same as in source data, need to investigate that |
| 467 |
|
| 468 |
=cut |
| 469 |
|
| 470 |
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 |
} else { |
| 478 |
$_; |
| 479 |
} |
| 480 |
} @{ $rec->{$f} }; |
| 481 |
} elsif( defined($rec->{$f}) ) { |
| 482 |
return $rec->{$f}; |
| 483 |
} |
| 484 |
} |
| 485 |
|
| 486 |
=head2 rec2 |
| 487 |
|
| 488 |
Return all values in specific field and subfield |
| 489 |
|
| 490 |
@v = rec2('200','a') |
| 491 |
|
| 492 |
=cut |
| 493 |
|
| 494 |
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 |
|
| 501 |
=head2 rec |
| 502 |
|
| 503 |
syntaxtic sugar for |
| 504 |
|
| 505 |
@v = rec('200') |
| 506 |
@v = rec('200','a') |
| 507 |
|
| 508 |
=cut |
| 509 |
|
| 510 |
sub rec { |
| 511 |
if ($#_ == 0) { |
| 512 |
return rec1(@_); |
| 513 |
} elsif ($#_ == 1) { |
| 514 |
return rec2(@_); |
| 515 |
} |
| 516 |
} |
| 517 |
|
| 518 |
=head2 regex |
| 519 |
|
| 520 |
Apply regex to some or all values |
| 521 |
|
| 522 |
@v = regex( 's/foo/bar/g', @v ); |
| 523 |
|
| 524 |
=cut |
| 525 |
|
| 526 |
sub regex { |
| 527 |
my $r = shift; |
| 528 |
my @out; |
| 529 |
#warn "r: $r\n", dump(\@_); |
| 530 |
foreach my $t (@_) { |
| 531 |
next unless ($t); |
| 532 |
eval "\$t =~ $r"; |
| 533 |
push @out, $t if ($t && $t ne ''); |
| 534 |
} |
| 535 |
return @out; |
| 536 |
} |
| 537 |
|
| 538 |
=head2 prefix |
| 539 |
|
| 540 |
Prefix all values with a string |
| 541 |
|
| 542 |
@v = prefix( 'my_', @v ); |
| 543 |
|
| 544 |
=cut |
| 545 |
|
| 546 |
sub prefix { |
| 547 |
my $p = shift or die "prefix needs string as first argument"; |
| 548 |
return map { $p . $_ } grep { defined($_) } @_; |
| 549 |
} |
| 550 |
|
| 551 |
=head2 suffix |
| 552 |
|
| 553 |
suffix all values with a string |
| 554 |
|
| 555 |
@v = suffix( '_my', @v ); |
| 556 |
|
| 557 |
=cut |
| 558 |
|
| 559 |
sub suffix { |
| 560 |
my $s = shift or die "suffix needs string as first argument"; |
| 561 |
return map { $_ . $s } grep { defined($_) } @_; |
| 562 |
} |
| 563 |
|
| 564 |
=head2 surround |
| 565 |
|
| 566 |
surround all values with a two strings |
| 567 |
|
| 568 |
@v = surround( 'prefix_', '_suffix', @v ); |
| 569 |
|
| 570 |
=cut |
| 571 |
|
| 572 |
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 |
} |
| 577 |
|
| 578 |
=head2 first |
| 579 |
|
| 580 |
Return first element |
| 581 |
|
| 582 |
$v = first( @v ); |
| 583 |
|
| 584 |
=cut |
| 585 |
|
| 586 |
sub first { |
| 587 |
my $r = shift; |
| 588 |
return $r; |
| 589 |
} |
| 590 |
|
| 591 |
=head2 lookup |
| 592 |
|
| 593 |
Consult lookup hashes for some value |
| 594 |
|
| 595 |
@v = lookup( $v ); |
| 596 |
@v = lookup( @v ); |
| 597 |
|
| 598 |
=cut |
| 599 |
|
| 600 |
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 |
} |
| 609 |
|
| 610 |
=head2 join_with |
| 611 |
|
| 612 |
Joins walues with some delimiter |
| 613 |
|
| 614 |
$v = join_with(", ", @v); |
| 615 |
|
| 616 |
=cut |
| 617 |
|
| 618 |
sub join_with { |
| 619 |
my $d = shift; |
| 620 |
return join($d, grep { defined($_) && $_ ne '' } @_); |
| 621 |
} |
| 622 |
|
| 623 |
=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 |
# END |
| 658 |
1; |
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