/[webpac2]/trunk/lib/WebPAC/Normalize.pm
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Annotation of /trunk/lib/WebPAC/Normalize.pm

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Revision 889 - (hide annotations)
Thu Sep 6 19:12:15 2007 UTC (15 years, 4 months ago) by dpavlin
File size: 30494 byte(s)
make missing value in marc_fixed confess and fixed warning

1 dpavlin 10 package WebPAC::Normalize;
2 dpavlin 536 use Exporter 'import';
3     @EXPORT = qw/
4 dpavlin 538 _set_rec _set_lookup
5 dpavlin 736 _set_load_row
6 dpavlin 538 _get_ds _clean_ds
7 dpavlin 554 _debug
8 dpavlin 641 _pack_subfields_hash
9 dpavlin 538
10 dpavlin 536 tag search display
11 dpavlin 547 marc marc_indicators marc_repeatable_subfield
12 dpavlin 815 marc_compose marc_leader marc_fixed
13 dpavlin 813 marc_duplicate marc_remove marc_count
14 dpavlin 604 marc_original_order
15 dpavlin 540
16 dpavlin 536 rec1 rec2 rec
17     regex prefix suffix surround
18     first lookup join_with
19 dpavlin 707 save_into_lookup
20 dpavlin 562
21     split_rec_on
22 dpavlin 785
23     get set
24 dpavlin 791 count
25 dpavlin 536 /;
26 dpavlin 10
27     use warnings;
28     use strict;
29 dpavlin 536
30     #use base qw/WebPAC::Common/;
31 dpavlin 550 use Data::Dump qw/dump/;
32 dpavlin 574 use Storable qw/dclone/;
33 dpavlin 725 use Carp qw/confess/;
34 dpavlin 10
35 dpavlin 550 # debugging warn(s)
36     my $debug = 0;
37    
38    
39 dpavlin 10 =head1 NAME
40    
41 dpavlin 536 WebPAC::Normalize - describe normalisaton rules using sets
42 dpavlin 10
43     =head1 VERSION
44    
45 dpavlin 819 Version 0.29
46 dpavlin 10
47     =cut
48    
49 dpavlin 819 our $VERSION = '0.29';
50 dpavlin 10
51     =head1 SYNOPSIS
52    
53 dpavlin 536 This module uses C<conf/normalize/*.pl> files to perform normalisation
54     from input records using perl functions which are specialized for set
55     processing.
56 dpavlin 10
57 dpavlin 536 Sets are implemented as arrays, and normalisation file is valid perl, which
58     means that you check it's validity before running WebPAC using
59     C<perl -c normalize.pl>.
60 dpavlin 15
61 dpavlin 536 Normalisation can generate multiple output normalized data. For now, supported output
62 dpavlin 540 types (on the left side of definition) are: C<tag>, C<display>, C<search> and
63 dpavlin 547 C<marc>.
64 dpavlin 15
65 dpavlin 10 =head1 FUNCTIONS
66    
67 dpavlin 538 Functions which start with C<_> are private and used by WebPAC internally.
68     All other functions are available for use within normalisation rules.
69    
70 dpavlin 536 =head2 data_structure
71 dpavlin 10
72 dpavlin 536 Return data structure
73 dpavlin 13
74 dpavlin 538 my $ds = WebPAC::Normalize::data_structure(
75 dpavlin 725 lookup => $lookup_hash,
76 dpavlin 536 row => $row,
77     rules => $normalize_pl_config,
78 dpavlin 541 marc_encoding => 'utf-8',
79 dpavlin 595 config => $config,
80 dpavlin 736 load_row_coderef => sub {
81 dpavlin 725 my ($database,$input,$mfn) = shift;
82 dpavlin 736 $store->load_row( database => $database, input => $input, id => $mfn );
83 dpavlin 725 },
84 dpavlin 13 );
85    
86 dpavlin 707 Options C<row>, C<rules> and C<log> are mandatory while all
87 dpavlin 540 other are optional.
88    
89 dpavlin 736 C<load_row_coderef> is closure only used when executing lookups, so they will
90 dpavlin 725 die if it's not defined.
91    
92 dpavlin 536 This function will B<die> if normalizastion can't be evaled.
93 dpavlin 15
94 dpavlin 538 Since this function isn't exported you have to call it with
95     C<WebPAC::Normalize::data_structure>.
96    
97 dpavlin 10 =cut
98    
99 dpavlin 736 my $load_row_coderef;
100 dpavlin 725
101 dpavlin 536 sub data_structure {
102     my $arg = {@_};
103 dpavlin 13
104 dpavlin 536 die "need row argument" unless ($arg->{row});
105     die "need normalisation argument" unless ($arg->{rules});
106 dpavlin 31
107 dpavlin 536 no strict 'subs';
108 dpavlin 730 _set_lookup( $arg->{lookup} ) if defined($arg->{lookup});
109 dpavlin 538 _set_rec( $arg->{row} );
110 dpavlin 730 _set_config( $arg->{config} ) if defined($arg->{config});
111 dpavlin 541 _clean_ds( %{ $arg } );
112 dpavlin 736 $load_row_coderef = $arg->{load_row_coderef};
113 dpavlin 725
114 dpavlin 536 eval "$arg->{rules}";
115     die "error evaling $arg->{rules}: $@\n" if ($@);
116 dpavlin 540
117 dpavlin 538 return _get_ds();
118 dpavlin 10 }
119    
120 dpavlin 538 =head2 _set_rec
121 dpavlin 13
122 dpavlin 536 Set current record hash
123 dpavlin 433
124 dpavlin 538 _set_rec( $rec );
125 dpavlin 433
126     =cut
127    
128 dpavlin 536 my $rec;
129 dpavlin 433
130 dpavlin 538 sub _set_rec {
131 dpavlin 536 $rec = shift or die "no record hash";
132 dpavlin 433 }
133    
134 dpavlin 595 =head2 _set_config
135    
136     Set current config hash
137    
138     _set_config( $config );
139    
140     Magic keys are:
141    
142     =over 4
143    
144     =item _
145    
146     Code of current database
147    
148     =item _mfn
149    
150     Current MFN
151    
152     =back
153    
154     =cut
155    
156     my $config;
157    
158     sub _set_config {
159     $config = shift;
160     }
161    
162 dpavlin 538 =head2 _get_ds
163    
164     Return hash formatted as data structure
165    
166     my $ds = _get_ds();
167    
168     =cut
169    
170 dpavlin 812 my ($out, $marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators, $marc_leader);
171 dpavlin 574 my ($marc_record_offset, $marc_fetch_offset) = (0, 0);
172 dpavlin 538
173     sub _get_ds {
174     return $out;
175     }
176    
177     =head2 _clean_ds
178    
179     Clean data structure hash for next record
180    
181     _clean_ds();
182    
183     =cut
184    
185     sub _clean_ds {
186 dpavlin 541 my $a = {@_};
187 dpavlin 812 ($out,$marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators, $marc_leader) = ();
188 dpavlin 574 ($marc_record_offset, $marc_fetch_offset) = (0,0);
189 dpavlin 541 $marc_encoding = $a->{marc_encoding};
190 dpavlin 538 }
191    
192     =head2 _set_lookup
193    
194     Set current lookup hash
195    
196     _set_lookup( $lookup );
197    
198     =cut
199    
200     my $lookup;
201    
202     sub _set_lookup {
203     $lookup = shift;
204     }
205    
206 dpavlin 707 =head2 _get_lookup
207    
208     Get current lookup hash
209    
210     my $lookup = _get_lookup();
211    
212     =cut
213    
214     sub _get_lookup {
215     return $lookup;
216     }
217    
218 dpavlin 736 =head2 _set_load_row
219 dpavlin 725
220     Setup code reference which will return L<data_structure> from
221     L<WebPAC::Store>
222    
223 dpavlin 736 _set_load_row(sub {
224 dpavlin 725 my ($database,$input,$mfn) = @_;
225 dpavlin 736 $store->load_row( database => $database, input => $input, id => $mfn );
226 dpavlin 725 });
227    
228     =cut
229    
230 dpavlin 736 sub _set_load_row {
231 dpavlin 725 my $coderef = shift;
232     confess "argument isn't CODE" unless ref($coderef) eq 'CODE';
233    
234 dpavlin 736 $load_row_coderef = $coderef;
235 dpavlin 725 }
236    
237 dpavlin 547 =head2 _get_marc_fields
238 dpavlin 540
239 dpavlin 547 Get all fields defined by calls to C<marc>
240 dpavlin 540
241 dpavlin 547 $marc->add_fields( WebPAC::Normalize:_get_marc_fields() );
242 dpavlin 540
243 dpavlin 543 We are using I<magic> which detect repeatable fields only from
244     sequence of field/subfield data generated by normalization.
245    
246 dpavlin 554 Repeatable field is created when there is second occurence of same subfield or
247     if any of indicators are different.
248 dpavlin 543
249 dpavlin 554 This is sane for most cases. Something like:
250 dpavlin 543
251 dpavlin 554 900a-1 900b-1 900c-1
252     900a-2 900b-2
253     900a-3
254    
255     will be created from any combination of:
256    
257     900a-1 900a-2 900a-3 900b-1 900b-2 900c-1
258    
259     and following rules:
260    
261     marc('900','a', rec('200','a') );
262     marc('900','b', rec('200','b') );
263     marc('900','c', rec('200','c') );
264    
265     which might not be what you have in mind. If you need repeatable subfield,
266     define it using C<marc_repeatable_subfield> like this:
267    
268 dpavlin 574 marc_repeatable_subfield('900','a');
269     marc('900','a', rec('200','a') );
270     marc('900','b', rec('200','b') );
271     marc('900','c', rec('200','c') );
272 dpavlin 554
273 dpavlin 574 will create:
274    
275     900a-1 900a-2 900a-3 900b-1 900c-1
276     900b-2
277    
278     There is also support for returning next or specific using:
279    
280     while (my $mf = WebPAC::Normalize:_get_marc_fields( fetch_next => 1 ) ) {
281     # do something with $mf
282     }
283    
284     will always return fields from next MARC record or
285    
286     my $mf = WebPAC::Normalize::_get_marc_fields( offset => 42 );
287    
288     will return 42th copy record (if it exists).
289    
290 dpavlin 540 =cut
291    
292 dpavlin 813 my $fetch_pos;
293    
294 dpavlin 547 sub _get_marc_fields {
295 dpavlin 550
296 dpavlin 574 my $arg = {@_};
297     warn "### _get_marc_fields arg: ", dump($arg), $/ if ($debug > 2);
298 dpavlin 813 $fetch_pos = $marc_fetch_offset;
299 dpavlin 574 if ($arg->{offset}) {
300 dpavlin 813 $fetch_pos = $arg->{offset};
301 dpavlin 574 } elsif($arg->{fetch_next}) {
302     $marc_fetch_offset++;
303     }
304 dpavlin 550
305 dpavlin 574 return if (! $marc_record || ref($marc_record) ne 'ARRAY');
306    
307     warn "### full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 2);
308    
309 dpavlin 813 my $marc_rec = $marc_record->[ $fetch_pos ];
310 dpavlin 574
311 dpavlin 813 warn "## _get_marc_fields (at offset: $fetch_pos) -- marc_record = ", dump( @$marc_rec ), $/ if ($debug > 1);
312 dpavlin 574
313     return if (! $marc_rec || ref($marc_rec) ne 'ARRAY' || $#{ $marc_rec } < 0);
314    
315 dpavlin 550 # first, sort all existing fields
316     # XXX might not be needed, but modern perl might randomize elements in hash
317     my @sorted_marc_record = sort {
318 dpavlin 572 $a->[0] . ( $a->[3] || '' ) cmp $b->[0] . ( $b->[3] || '')
319 dpavlin 574 } @{ $marc_rec };
320 dpavlin 550
321 dpavlin 574 @sorted_marc_record = @{ $marc_rec }; ### FIXME disable sorting
322 dpavlin 562
323 dpavlin 550 # output marc fields
324 dpavlin 542 my @m;
325 dpavlin 550
326     # count unique field-subfields (used for offset when walking to next subfield)
327     my $u;
328 dpavlin 572 map { $u->{ $_->[0] . ( $_->[3] || '') }++ } @sorted_marc_record;
329 dpavlin 550
330     if ($debug) {
331 dpavlin 574 warn "## marc_repeatable_subfield = ", dump( $marc_repeatable_subfield ), $/ if ( $marc_repeatable_subfield );
332 dpavlin 813 warn "## marc_record[$fetch_pos] = ", dump( $marc_rec ), $/;
333 dpavlin 574 warn "## sorted_marc_record = ", dump( \@sorted_marc_record ), $/;
334     warn "## subfield count = ", dump( $u ), $/;
335 dpavlin 550 }
336    
337     my $len = $#sorted_marc_record;
338     my $visited;
339     my $i = 0;
340     my $field;
341    
342     foreach ( 0 .. $len ) {
343    
344     # find next element which isn't visited
345     while ($visited->{$i}) {
346     $i = ($i + 1) % ($len + 1);
347 dpavlin 542 }
348    
349 dpavlin 550 # mark it visited
350     $visited->{$i}++;
351    
352 dpavlin 574 my $row = dclone( $sorted_marc_record[$i] );
353 dpavlin 550
354     # field and subfield which is key for
355     # marc_repeatable_subfield and u
356 dpavlin 572 my $fsf = $row->[0] . ( $row->[3] || '' );
357 dpavlin 550
358     if ($debug > 1) {
359    
360     print "### field so far [", $#$field, "] : ", dump( $field ), " ", $field ? 'T' : 'F', $/;
361     print "### this [$i]: ", dump( $row ),$/;
362     print "### sf: ", $row->[3], " vs ", $field->[3],
363     $marc_repeatable_subfield->{ $row->[0] . $row->[3] } ? ' (repeatable)' : '', $/,
364     if ($#$field >= 0);
365    
366     }
367    
368     # if field exists
369     if ( $#$field >= 0 ) {
370     if (
371     $row->[0] ne $field->[0] || # field
372     $row->[1] ne $field->[1] || # i1
373     $row->[2] ne $field->[2] # i2
374     ) {
375     push @m, $field;
376     warn "## saved/1 ", dump( $field ),$/ if ($debug);
377     $field = $row;
378    
379     } elsif (
380     ( $row->[3] lt $field->[-2] ) # subfield which is not next (e.g. a after c)
381     ||
382     ( $row->[3] eq $field->[-2] && # same subfield, but not repeatable
383     ! $marc_repeatable_subfield->{ $fsf }
384     )
385     ) {
386     push @m, $field;
387     warn "## saved/2 ", dump( $field ),$/ if ($debug);
388     $field = $row;
389    
390     } else {
391     # append new subfields to existing field
392     push @$field, ( $row->[3], $row->[4] );
393     }
394     } else {
395     # insert first field
396     $field = $row;
397     }
398    
399     if (! $marc_repeatable_subfield->{ $fsf }) {
400     # make step to next subfield
401     $i = ($i + $u->{ $fsf } ) % ($len + 1);
402     }
403 dpavlin 542 }
404    
405 dpavlin 550 if ($#$field >= 0) {
406     push @m, $field;
407     warn "## saved/3 ", dump( $field ),$/ if ($debug);
408     }
409 dpavlin 542
410 dpavlin 579 return \@m;
411 dpavlin 540 }
412    
413 dpavlin 813 =head2 _get_marc_leader
414    
415     Return leader from currently fetched record by L</_get_marc_fields>
416    
417     print WebPAC::Normalize::_get_marc_leader();
418    
419     =cut
420    
421     sub _get_marc_leader {
422     die "no fetch_pos, did you called _get_marc_fields first?" unless ( defined( $fetch_pos ) );
423     return $marc_leader->[ $fetch_pos ];
424     }
425    
426 dpavlin 554 =head2 _debug
427    
428     Change level of debug warnings
429    
430     _debug( 2 );
431    
432     =cut
433    
434     sub _debug {
435     my $l = shift;
436     return $debug unless defined($l);
437 dpavlin 568 warn "debug level $l",$/ if ($l > 0);
438 dpavlin 554 $debug = $l;
439     }
440    
441 dpavlin 540 =head1 Functions to create C<data_structure>
442    
443     Those functions generally have to first in your normalization file.
444    
445 dpavlin 536 =head2 tag
446 dpavlin 433
447 dpavlin 536 Define new tag for I<search> and I<display>.
448 dpavlin 433
449 dpavlin 536 tag('Title', rec('200','a') );
450 dpavlin 13
451    
452     =cut
453    
454 dpavlin 536 sub tag {
455     my $name = shift or die "tag needs name as first argument";
456     my @o = grep { defined($_) && $_ ne '' } @_;
457     return unless (@o);
458     $out->{$name}->{tag} = $name;
459     $out->{$name}->{search} = \@o;
460     $out->{$name}->{display} = \@o;
461     }
462 dpavlin 13
463 dpavlin 536 =head2 display
464 dpavlin 13
465 dpavlin 536 Define tag just for I<display>
466 dpavlin 125
467 dpavlin 536 @v = display('Title', rec('200','a') );
468 dpavlin 125
469 dpavlin 536 =cut
470 dpavlin 125
471 dpavlin 536 sub display {
472     my $name = shift or die "display needs name as first argument";
473     my @o = grep { defined($_) && $_ ne '' } @_;
474     return unless (@o);
475     $out->{$name}->{tag} = $name;
476     $out->{$name}->{display} = \@o;
477     }
478 dpavlin 13
479 dpavlin 536 =head2 search
480 dpavlin 13
481 dpavlin 536 Prepare values just for I<search>
482 dpavlin 13
483 dpavlin 536 @v = search('Title', rec('200','a') );
484 dpavlin 433
485 dpavlin 536 =cut
486 dpavlin 13
487 dpavlin 536 sub search {
488     my $name = shift or die "search needs name as first argument";
489     my @o = grep { defined($_) && $_ ne '' } @_;
490     return unless (@o);
491     $out->{$name}->{tag} = $name;
492     $out->{$name}->{search} = \@o;
493 dpavlin 13 }
494    
495 dpavlin 564 =head2 marc_leader
496    
497     Setup fields within MARC leader or get leader
498    
499     marc_leader('05','c');
500     my $leader = marc_leader();
501    
502     =cut
503    
504     sub marc_leader {
505     my ($offset,$value) = @_;
506    
507     if ($offset) {
508 dpavlin 813 $marc_leader->[ $marc_record_offset ]->{ $offset } = $value;
509 dpavlin 564 } else {
510 dpavlin 813
511     if (defined($marc_leader)) {
512     die "marc_leader not array = ", dump( $marc_leader ) unless (ref($marc_leader) eq 'ARRAY');
513     return $marc_leader->[ $marc_record_offset ];
514     } else {
515     return;
516     }
517 dpavlin 564 }
518     }
519    
520 dpavlin 815 =head2 marc_fixed
521    
522     Create control/indentifier fields with values in fixed positions
523    
524     marc_fixed('008', 00, '070402');
525     marc_fixed('008', 39, '|');
526    
527     Positions not specified will be filled with spaces (C<0x20>).
528    
529     There will be no effort to extend last specified value to full length of
530     field in standard.
531    
532     =cut
533    
534     sub marc_fixed {
535     my ($f, $pos, $val) = @_;
536     die "need marc(field, position, value)" unless defined($f) && defined($pos);
537    
538 dpavlin 889 confess "need val" unless defined $val;
539    
540 dpavlin 815 my $update = 0;
541    
542     map {
543     if ($_->[0] eq $f) {
544     my $old = $_->[1];
545 dpavlin 889 if (length($old) <= $pos) {
546 dpavlin 815 $_->[1] .= ' ' x ( $pos - length($old) ) . $val;
547 dpavlin 817 warn "## marc_fixed($f,$pos,'$val') append '$old' -> '$_->[1]'\n" if ($debug > 1);
548 dpavlin 815 } else {
549     $_->[1] = substr($old, 0, $pos) . $val . substr($old, $pos + length($val));
550 dpavlin 817 warn "## marc_fixed($f,$pos,'$val') update '$old' -> '$_->[1]'\n" if ($debug > 1);
551 dpavlin 815 }
552     $update++;
553     }
554     } @{ $marc_record->[ $marc_record_offset ] };
555    
556     if (! $update) {
557     my $v = ' ' x $pos . $val;
558     push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $v ];
559 dpavlin 817 warn "## marc_fixed($f,$pos,'val') created '$v'\n" if ($debug > 1);
560 dpavlin 815 }
561     }
562    
563 dpavlin 547 =head2 marc
564 dpavlin 540
565     Save value for MARC field
566    
567 dpavlin 547 marc('900','a', rec('200','a') );
568 dpavlin 571 marc('001', rec('000') );
569 dpavlin 540
570     =cut
571    
572 dpavlin 547 sub marc {
573     my $f = shift or die "marc needs field";
574     die "marc field must be numer" unless ($f =~ /^\d+$/);
575 dpavlin 540
576 dpavlin 571 my $sf;
577     if ($f >= 10) {
578     $sf = shift or die "marc needs subfield";
579     }
580 dpavlin 540
581 dpavlin 541 foreach (@_) {
582     my $v = $_; # make var read-write for Encode
583 dpavlin 543 next unless (defined($v) && $v !~ /^\s*$/);
584 dpavlin 548 my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
585 dpavlin 571 if (defined $sf) {
586 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $i1, $i2, $sf => $v ];
587 dpavlin 571 } else {
588 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $v ];
589 dpavlin 571 }
590 dpavlin 540 }
591     }
592    
593 dpavlin 547 =head2 marc_repeatable_subfield
594    
595     Save values for MARC repetable subfield
596    
597     marc_repeatable_subfield('910', 'z', rec('909') );
598    
599     =cut
600    
601     sub marc_repeatable_subfield {
602 dpavlin 550 my ($f,$sf) = @_;
603     die "marc_repeatable_subfield need field and subfield!\n" unless ($f && $sf);
604     $marc_repeatable_subfield->{ $f . $sf }++;
605 dpavlin 547 marc(@_);
606     }
607    
608     =head2 marc_indicators
609    
610     Set both indicators for MARC field
611    
612     marc_indicators('900', ' ', 1);
613    
614     Any indicator value other than C<0-9> will be treated as undefined.
615    
616     =cut
617    
618     sub marc_indicators {
619     my $f = shift || die "marc_indicators need field!\n";
620     my ($i1,$i2) = @_;
621     die "marc_indicators($f, ...) need i1!\n" unless(defined($i1));
622     die "marc_indicators($f, $i1, ...) need i2!\n" unless(defined($i2));
623    
624     $i1 = ' ' if ($i1 !~ /^\d$/);
625     $i2 = ' ' if ($i2 !~ /^\d$/);
626 dpavlin 548 @{ $marc_indicators->{$f} } = ($i1,$i2);
627 dpavlin 547 }
628    
629 dpavlin 562 =head2 marc_compose
630 dpavlin 547
631 dpavlin 562 Save values for each MARC subfield explicitly
632    
633     marc_compose('900',
634     'a', rec('200','a')
635     'b', rec('201','a')
636     'a', rec('200','b')
637     'c', rec('200','c')
638     );
639    
640 dpavlin 603 If you specify C<+> for subfield, value will be appended
641     to previous defined subfield.
642    
643 dpavlin 562 =cut
644    
645     sub marc_compose {
646     my $f = shift or die "marc_compose needs field";
647     die "marc_compose field must be numer" unless ($f =~ /^\d+$/);
648    
649     my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
650     my $m = [ $f, $i1, $i2 ];
651    
652 dpavlin 583 warn "### marc_compose input subfields = ", dump(@_),$/ if ($debug > 2);
653    
654 dpavlin 619 if ($#_ % 2 != 1) {
655     die "ERROR: marc_compose",dump($f,@_)," not valid (must be even).\nDo you need to add first() or join() around some argument?\n";
656     }
657    
658 dpavlin 562 while (@_) {
659 dpavlin 619 my $sf = shift;
660 dpavlin 565 my $v = shift;
661 dpavlin 562
662     next unless (defined($v) && $v !~ /^\s*$/);
663 dpavlin 568 warn "## ++ marc_compose($f,$sf,$v) ", dump( $m ),$/ if ($debug > 1);
664 dpavlin 603 if ($sf ne '+') {
665     push @$m, ( $sf, $v );
666     } else {
667     $m->[ $#$m ] .= $v;
668     }
669 dpavlin 562 }
670    
671 dpavlin 586 warn "## marc_compose current marc = ", dump( $m ),$/ if ($debug > 1);
672 dpavlin 562
673 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, $m if ($#{$m} > 2);
674 dpavlin 562 }
675    
676 dpavlin 574 =head2 marc_duplicate
677 dpavlin 562
678 dpavlin 574 Generate copy of current MARC record and continue working on copy
679    
680     marc_duplicate();
681    
682     Copies can be accessed using C<< _get_marc_fields( fetch_next => 1 ) >> or
683     C<< _get_marc_fields( offset => 42 ) >>.
684    
685     =cut
686    
687     sub marc_duplicate {
688     my $m = $marc_record->[ -1 ];
689     die "can't duplicate record which isn't defined" unless ($m);
690     push @{ $marc_record }, dclone( $m );
691 dpavlin 813 push @{ $marc_leader }, dclone( marc_leader() );
692     warn "## marc_duplicate = ", dump(@$marc_leader, @$marc_record), $/ if ($debug > 1);
693 dpavlin 574 $marc_record_offset = $#{ $marc_record };
694     warn "## marc_record_offset = $marc_record_offset", $/ if ($debug > 1);
695 dpavlin 813
696 dpavlin 574 }
697    
698     =head2 marc_remove
699    
700     Remove some field or subfield from MARC record.
701    
702     marc_remove('200');
703     marc_remove('200','a');
704    
705     This will erase field C<200> or C<200^a> from current MARC record.
706    
707 dpavlin 786 marc_remove('*');
708    
709     Will remove all fields in current MARC record.
710    
711 dpavlin 574 This is useful after calling C<marc_duplicate> or on it's own (but, you
712     should probably just remove that subfield definition if you are not
713     using C<marc_duplicate>).
714    
715     FIXME: support fields < 10.
716    
717     =cut
718    
719     sub marc_remove {
720     my ($f, $sf) = @_;
721    
722     die "marc_remove needs record number" unless defined($f);
723    
724     my $marc = $marc_record->[ $marc_record_offset ];
725    
726     warn "### marc_remove before = ", dump( $marc ), $/ if ($debug > 2);
727    
728 dpavlin 786 if ($f eq '*') {
729    
730     delete( $marc_record->[ $marc_record_offset ] );
731 dpavlin 788 warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
732 dpavlin 786
733     } else {
734    
735     my $i = 0;
736     foreach ( 0 .. $#{ $marc } ) {
737     last unless (defined $marc->[$i]);
738     warn "#### working on ",dump( @{ $marc->[$i] }), $/ if ($debug > 3);
739     if ($marc->[$i]->[0] eq $f) {
740     if (! defined $sf) {
741     # remove whole field
742     splice @$marc, $i, 1;
743     warn "#### slice \@\$marc, $i, 1 = ",dump( @{ $marc }), $/ if ($debug > 3);
744     $i--;
745     } else {
746     foreach my $j ( 0 .. (( $#{ $marc->[$i] } - 3 ) / 2) ) {
747     my $o = ($j * 2) + 3;
748     if ($marc->[$i]->[$o] eq $sf) {
749     # remove subfield
750     splice @{$marc->[$i]}, $o, 2;
751     warn "#### slice \@{\$marc->[$i]}, $o, 2 = ", dump( @{ $marc }), $/ if ($debug > 3);
752     # is record now empty?
753     if ($#{ $marc->[$i] } == 2) {
754     splice @$marc, $i, 1;
755     warn "#### slice \@\$marc, $i, 1 = ", dump( @{ $marc }), $/ if ($debug > 3);
756     $i--;
757     };
758     }
759 dpavlin 574 }
760     }
761     }
762 dpavlin 786 $i++;
763 dpavlin 574 }
764 dpavlin 786
765     warn "### marc_remove($f", $sf ? ",$sf" : "", ") after = ", dump( $marc ), $/ if ($debug > 2);
766    
767     $marc_record->[ $marc_record_offset ] = $marc;
768 dpavlin 574 }
769    
770     warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
771     }
772    
773 dpavlin 604 =head2 marc_original_order
774    
775     Copy all subfields preserving original order to marc field.
776    
777 dpavlin 616 marc_original_order( marc_field_number, original_input_field_number );
778 dpavlin 604
779 dpavlin 616 Please note that field numbers are consistent with other commands (marc
780     field number first), but somewhat counter-intuitive (destination and then
781     source).
782    
783 dpavlin 604 You might want to use this command if you are just renaming subfields or
784     using pre-processing modify_record in C<config.yml> and don't need any
785     post-processing or want to preserve order of original subfields.
786    
787 dpavlin 616
788 dpavlin 604 =cut
789    
790     sub marc_original_order {
791    
792 dpavlin 616 my ($to, $from) = @_;
793 dpavlin 604 die "marc_original_order needs from and to fields\n" unless ($from && $to);
794    
795 dpavlin 616 return unless defined($rec->{$from});
796    
797     my $r = $rec->{$from};
798 dpavlin 604 die "record field $from isn't array\n" unless (ref($r) eq 'ARRAY');
799    
800     my ($i1,$i2) = defined($marc_indicators->{$to}) ? @{ $marc_indicators->{$to} } : (' ',' ');
801 dpavlin 616 warn "## marc_original_order($to,$from) source = ", dump( $r ),$/ if ($debug > 1);
802 dpavlin 604
803     foreach my $d (@$r) {
804    
805 dpavlin 605 if (! defined($d->{subfields}) && ref($d->{subfields}) ne 'ARRAY') {
806 dpavlin 616 warn "# marc_original_order($to,$from): field $from doesn't have subfields specification\n";
807 dpavlin 605 next;
808     }
809    
810 dpavlin 604 my @sfs = @{ $d->{subfields} };
811    
812     die "field $from doesn't have even number of subfields specifications\n" unless($#sfs % 2 == 1);
813    
814 dpavlin 618 warn "#--> d: ",dump($d), "\n#--> sfs: ",dump(@sfs),$/ if ($debug > 2);
815 dpavlin 604
816     my $m = [ $to, $i1, $i2 ];
817    
818     while (my $sf = shift @sfs) {
819 dpavlin 618
820     warn "#--> sf: ",dump($sf), $/ if ($debug > 2);
821 dpavlin 604 my $offset = shift @sfs;
822     die "corrupted sufields specification for field $from\n" unless defined($offset);
823    
824     my $v;
825     if (ref($d->{$sf}) eq 'ARRAY') {
826     $v = $d->{$sf}->[$offset] if (defined($d->{$sf}->[$offset]));
827     } elsif ($offset == 0) {
828     $v = $d->{$sf};
829     } else {
830     die "field $from subfield '$sf' need occurence $offset which doesn't exist", dump($d->{$sf});
831     }
832     push @$m, ( $sf, $v ) if (defined($v));
833     }
834    
835     if ($#{$m} > 2) {
836     push @{ $marc_record->[ $marc_record_offset ] }, $m;
837     }
838     }
839    
840     warn "## marc_record = ", dump( $marc_record ),$/ if ($debug > 1);
841     }
842    
843 dpavlin 813 =head2 marc_count
844 dpavlin 604
845 dpavlin 813 Return number of MARC records created using L</marc_duplicate>.
846    
847     print "created ", marc_count(), " records";
848    
849     =cut
850    
851     sub marc_count {
852     return $#{ $marc_record };
853     }
854    
855    
856 dpavlin 540 =head1 Functions to extract data from input
857    
858     This function should be used inside functions to create C<data_structure> described
859     above.
860    
861 dpavlin 641 =head2 _pack_subfields_hash
862    
863 dpavlin 669 @subfields = _pack_subfields_hash( $h );
864     $subfields = _pack_subfields_hash( $h, 1 );
865 dpavlin 641
866 dpavlin 669 Return each subfield value in array or pack them all together and return scalar
867     with subfields (denoted by C<^>) and values.
868    
869 dpavlin 641 =cut
870    
871     sub _pack_subfields_hash {
872    
873 dpavlin 642 warn "## _pack_subfields_hash( ",dump(@_), " )\n" if ($debug > 1);
874 dpavlin 641
875     my ($h,$include_subfields) = @_;
876    
877 dpavlin 831 # sanity and ease of use
878     return $h if (ref($h) ne 'HASH');
879    
880 dpavlin 641 if ( defined($h->{subfields}) ) {
881     my $sfs = delete $h->{subfields} || die "no subfields?";
882     my @out;
883     while (@$sfs) {
884     my $sf = shift @$sfs;
885     push @out, '^' . $sf if ($include_subfields);
886     my $o = shift @$sfs;
887     if ($o == 0 && ref( $h->{$sf} ) ne 'ARRAY' ) {
888     # single element subfields are not arrays
889 dpavlin 669 #warn "====> $sf $o / $#$sfs ", dump( $sfs, $h->{$sf} ), "\n";
890 dpavlin 667
891 dpavlin 641 push @out, $h->{$sf};
892     } else {
893 dpavlin 669 #warn "====> $sf $o / $#$sfs ", dump( $sfs, $h->{$sf} ), "\n";
894 dpavlin 641 push @out, $h->{$sf}->[$o];
895     }
896     }
897 dpavlin 667 if ($include_subfields) {
898     return join('', @out);
899     } else {
900     return @out;
901     }
902 dpavlin 641 } else {
903 dpavlin 667 if ($include_subfields) {
904     my $out = '';
905 dpavlin 668 foreach my $sf (sort keys %$h) {
906 dpavlin 667 if (ref($h->{$sf}) eq 'ARRAY') {
907     $out .= '^' . $sf . join('^' . $sf, @{ $h->{$sf} });
908     } else {
909     $out .= '^' . $sf . $h->{$sf};
910     }
911     }
912     return $out;
913     } else {
914     # FIXME this should probably be in alphabetical order instead of hash order
915     values %{$h};
916     }
917 dpavlin 641 }
918     }
919    
920 dpavlin 536 =head2 rec1
921 dpavlin 371
922 dpavlin 536 Return all values in some field
923 dpavlin 371
924 dpavlin 536 @v = rec1('200')
925 dpavlin 15
926 dpavlin 536 TODO: order of values is probably same as in source data, need to investigate that
927 dpavlin 15
928 dpavlin 536 =cut
929 dpavlin 15
930 dpavlin 536 sub rec1 {
931     my $f = shift;
932 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
933 dpavlin 536 return unless (defined($rec) && defined($rec->{$f}));
934 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
935 dpavlin 536 if (ref($rec->{$f}) eq 'ARRAY') {
936 dpavlin 641 my @out;
937     foreach my $h ( @{ $rec->{$f} } ) {
938     if (ref($h) eq 'HASH') {
939     push @out, ( _pack_subfields_hash( $h ) );
940 dpavlin 31 } else {
941 dpavlin 641 push @out, $h;
942 dpavlin 31 }
943 dpavlin 641 }
944     return @out;
945 dpavlin 536 } elsif( defined($rec->{$f}) ) {
946     return $rec->{$f};
947 dpavlin 15 }
948     }
949    
950 dpavlin 536 =head2 rec2
951 dpavlin 15
952 dpavlin 536 Return all values in specific field and subfield
953 dpavlin 13
954 dpavlin 536 @v = rec2('200','a')
955 dpavlin 13
956     =cut
957    
958 dpavlin 536 sub rec2 {
959     my $f = shift;
960     return unless (defined($rec && $rec->{$f}));
961     my $sf = shift;
962 dpavlin 601 warn "rec2($f,$sf) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
963 dpavlin 589 return map {
964     if (ref($_->{$sf}) eq 'ARRAY') {
965     @{ $_->{$sf} };
966     } else {
967     $_->{$sf};
968     }
969     } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} };
970 dpavlin 536 }
971 dpavlin 13
972 dpavlin 536 =head2 rec
973 dpavlin 13
974 dpavlin 536 syntaxtic sugar for
975 dpavlin 13
976 dpavlin 536 @v = rec('200')
977     @v = rec('200','a')
978 dpavlin 13
979 dpavlin 750 If rec() returns just single value, it will
980     return scalar, not array.
981    
982 dpavlin 536 =cut
983 dpavlin 373
984 dpavlin 536 sub rec {
985 dpavlin 583 my @out;
986 dpavlin 536 if ($#_ == 0) {
987 dpavlin 583 @out = rec1(@_);
988 dpavlin 536 } elsif ($#_ == 1) {
989 dpavlin 583 @out = rec2(@_);
990 dpavlin 13 }
991 dpavlin 750 if ($#out == 0 && ! wantarray) {
992     return $out[0];
993     } elsif (@out) {
994 dpavlin 583 return @out;
995     } else {
996     return '';
997     }
998 dpavlin 13 }
999    
1000 dpavlin 536 =head2 regex
1001 dpavlin 15
1002 dpavlin 536 Apply regex to some or all values
1003 dpavlin 15
1004 dpavlin 536 @v = regex( 's/foo/bar/g', @v );
1005 dpavlin 15
1006     =cut
1007    
1008 dpavlin 536 sub regex {
1009     my $r = shift;
1010     my @out;
1011 dpavlin 550 #warn "r: $r\n", dump(\@_);
1012 dpavlin 536 foreach my $t (@_) {
1013     next unless ($t);
1014     eval "\$t =~ $r";
1015     push @out, $t if ($t && $t ne '');
1016 dpavlin 368 }
1017 dpavlin 536 return @out;
1018 dpavlin 15 }
1019    
1020 dpavlin 536 =head2 prefix
1021 dpavlin 15
1022 dpavlin 536 Prefix all values with a string
1023 dpavlin 15
1024 dpavlin 536 @v = prefix( 'my_', @v );
1025 dpavlin 15
1026     =cut
1027    
1028 dpavlin 536 sub prefix {
1029 dpavlin 819 my $p = shift;
1030     return @_ unless defined( $p );
1031 dpavlin 536 return map { $p . $_ } grep { defined($_) } @_;
1032     }
1033 dpavlin 15
1034 dpavlin 536 =head2 suffix
1035 dpavlin 15
1036 dpavlin 536 suffix all values with a string
1037 dpavlin 15
1038 dpavlin 536 @v = suffix( '_my', @v );
1039 dpavlin 15
1040 dpavlin 536 =cut
1041 dpavlin 15
1042 dpavlin 536 sub suffix {
1043 dpavlin 819 my $s = shift;
1044     return @_ unless defined( $s );
1045 dpavlin 536 return map { $_ . $s } grep { defined($_) } @_;
1046 dpavlin 15 }
1047    
1048 dpavlin 536 =head2 surround
1049 dpavlin 13
1050 dpavlin 536 surround all values with a two strings
1051 dpavlin 13
1052 dpavlin 536 @v = surround( 'prefix_', '_suffix', @v );
1053 dpavlin 13
1054     =cut
1055    
1056 dpavlin 536 sub surround {
1057 dpavlin 819 my $p = shift;
1058     my $s = shift;
1059     $p = '' unless defined( $p );
1060     $s = '' unless defined( $s );
1061 dpavlin 536 return map { $p . $_ . $s } grep { defined($_) } @_;
1062 dpavlin 13 }
1063    
1064 dpavlin 536 =head2 first
1065 dpavlin 13
1066 dpavlin 536 Return first element
1067 dpavlin 15
1068 dpavlin 536 $v = first( @v );
1069 dpavlin 13
1070     =cut
1071    
1072 dpavlin 536 sub first {
1073     my $r = shift;
1074     return $r;
1075 dpavlin 13 }
1076    
1077 dpavlin 536 =head2 lookup
1078 dpavlin 13
1079 dpavlin 536 Consult lookup hashes for some value
1080 dpavlin 13
1081 dpavlin 725 @v = lookup(
1082     sub {
1083     'ffkk/peri/mfn'.rec('000')
1084     },
1085     'ffkk','peri','200-a-200-e',
1086     sub {
1087     first(rec(200,'a')).' '.first(rec('200','e'))
1088     }
1089     );
1090 dpavlin 13
1091 dpavlin 725 Code like above will be B<automatically generated> using L<WebPAC::Parse> from
1092     normal lookup definition in C<conf/lookup/something.pl> which looks like:
1093 dpavlin 707
1094 dpavlin 725 lookup(
1095     # which results to return from record recorded in lookup
1096     sub { 'ffkk/peri/mfn' . rec('000') },
1097     # from which database and input
1098     'ffkk','peri',
1099     # such that following values match
1100     sub { first(rec(200,'a')) . ' ' . first(rec('200','e')) },
1101     # if this part is missing, we will try to match same fields
1102     # from lookup record and current one, or you can override
1103     # which records to use from current record using
1104     sub { rec('900','x') . ' ' . rec('900','y') },
1105     )
1106    
1107     You can think about this lookup as SQL (if that helps):
1108    
1109     select
1110     sub { what }
1111     from
1112     database, input
1113     where
1114     sub { filter from lookuped record }
1115     having
1116     sub { optional filter on current record }
1117    
1118     Easy as pie, right?
1119    
1120 dpavlin 13 =cut
1121    
1122 dpavlin 536 sub lookup {
1123 dpavlin 725 my ($what, $database, $input, $key, $having) = @_;
1124    
1125 dpavlin 766 confess "lookup needs 5 arguments: what, database, input, key, having\n" unless ($#_ == 4);
1126 dpavlin 725
1127 dpavlin 729 warn "## lookup ($database, $input, $key)", $/ if ($debug > 1);
1128 dpavlin 725 return unless (defined($lookup->{$database}->{$input}->{$key}));
1129    
1130 dpavlin 736 confess "lookup really need load_row_coderef added to data_structure\n" unless ($load_row_coderef);
1131 dpavlin 725
1132     my $mfns;
1133     my @having = $having->();
1134    
1135 dpavlin 729 warn "## having = ", dump( @having ) if ($debug > 2);
1136 dpavlin 725
1137     foreach my $h ( @having ) {
1138     if (defined($lookup->{$database}->{$input}->{$key}->{$h})) {
1139 dpavlin 752 warn "lookup for $database/$input/$key/$h return ",dump($lookup->{$database}->{$input}->{$key}->{$h}),"\n" if ($debug);
1140 dpavlin 725 $mfns->{$_}++ foreach keys %{ $lookup->{$database}->{$input}->{$key}->{$h} };
1141     }
1142 dpavlin 536 }
1143 dpavlin 725
1144     return unless ($mfns);
1145    
1146     my @mfns = sort keys %$mfns;
1147    
1148 dpavlin 750 warn "# lookup loading $database/$input/$key mfn ", join(",",@mfns)," having ",dump(@having),"\n" if ($debug);
1149 dpavlin 725
1150     my $old_rec = $rec;
1151     my @out;
1152    
1153     foreach my $mfn (@mfns) {
1154 dpavlin 736 $rec = $load_row_coderef->( $database, $input, $mfn );
1155 dpavlin 725
1156 dpavlin 752 warn "got $database/$input/$mfn = ", dump($rec), $/ if ($debug);
1157 dpavlin 725
1158     my @vals = $what->();
1159    
1160     push @out, ( @vals );
1161    
1162 dpavlin 752 warn "lookup for mfn $mfn returned ", dump(@vals), $/ if ($debug);
1163 dpavlin 725 }
1164    
1165     # if (ref($lookup->{$k}) eq 'ARRAY') {
1166     # return @{ $lookup->{$k} };
1167     # } else {
1168     # return $lookup->{$k};
1169     # }
1170    
1171     $rec = $old_rec;
1172    
1173 dpavlin 750 warn "## lookup returns = ", dump(@out), $/ if ($debug);
1174 dpavlin 725
1175 dpavlin 740 if ($#out == 0) {
1176     return $out[0];
1177     } else {
1178     return @out;
1179     }
1180 dpavlin 13 }
1181    
1182 dpavlin 707 =head2 save_into_lookup
1183    
1184 dpavlin 725 Save value into lookup. It associates current database, input
1185     and specific keys with one or more values which will be
1186     associated over MFN.
1187 dpavlin 707
1188 dpavlin 725 MFN will be extracted from first occurence current of field 000
1189     in current record, or if it doesn't exist from L<_set_config> C<_mfn>.
1190    
1191     my $nr = save_into_lookup($database,$input,$key,sub {
1192 dpavlin 707 # code which produce one or more values
1193     });
1194    
1195 dpavlin 725 It returns number of items saved.
1196 dpavlin 707
1197 dpavlin 725 This function shouldn't be called directly, it's called from code created by
1198     L<WebPAC::Parser>.
1199    
1200 dpavlin 707 =cut
1201    
1202     sub save_into_lookup {
1203 dpavlin 712 my ($database,$input,$key,$coderef) = @_;
1204     die "save_into_lookup needs database" unless defined($database);
1205     die "save_into_lookup needs input" unless defined($input);
1206     die "save_into_lookup needs key" unless defined($key);
1207 dpavlin 707 die "save_into_lookup needs CODE" unless ( defined($coderef) && ref($coderef) eq 'CODE' );
1208 dpavlin 725
1209 dpavlin 729 warn "## save_into_lookup rec = ", dump($rec), " config = ", dump($config), $/ if ($debug > 2);
1210 dpavlin 725
1211     my $mfn =
1212     defined($rec->{'000'}->[0]) ? $rec->{'000'}->[0] :
1213     defined($config->{_mfn}) ? $config->{_mfn} :
1214     die "mfn not defined or zero";
1215    
1216     my $nr = 0;
1217    
1218 dpavlin 707 foreach my $v ( $coderef->() ) {
1219 dpavlin 712 $lookup->{$database}->{$input}->{$key}->{$v}->{$mfn}++;
1220 dpavlin 721 warn "# saved lookup $database/$input/$key [$v] $mfn\n" if ($debug > 1);
1221 dpavlin 725 $nr++;
1222 dpavlin 707 }
1223 dpavlin 725
1224     return $nr;
1225 dpavlin 707 }
1226    
1227 dpavlin 595 =head2 config
1228    
1229     Consult config values stored in C<config.yml>
1230    
1231     # return database code (key under databases in yaml)
1232     $database_code = config(); # use _ from hash
1233     $database_name = config('name');
1234     $database_input_name = config('input name');
1235     $tag = config('input normalize tag');
1236    
1237     Up to three levels are supported.
1238    
1239     =cut
1240    
1241     sub config {
1242     return unless ($config);
1243    
1244     my $p = shift;
1245    
1246     $p ||= '';
1247    
1248     my $v;
1249    
1250     warn "### getting config($p)\n" if ($debug > 1);
1251    
1252     my @p = split(/\s+/,$p);
1253     if ($#p < 0) {
1254     $v = $config->{ '_' }; # special, database code
1255     } else {
1256    
1257     my $c = dclone( $config );
1258    
1259     foreach my $k (@p) {
1260     warn "### k: $k c = ",dump($c),$/ if ($debug > 1);
1261     if (ref($c) eq 'ARRAY') {
1262     $c = shift @$c;
1263     warn "config($p) taking first occurence of '$k', probably not what you wanted!\n";
1264     last;
1265     }
1266    
1267     if (! defined($c->{$k}) ) {
1268     $c = undef;
1269     last;
1270     } else {
1271     $c = $c->{$k};
1272     }
1273     }
1274     $v = $c if ($c);
1275    
1276     }
1277    
1278     warn "## config( '$p' ) = ",dump( $v ),$/ if ($v && $debug);
1279     warn "config( '$p' ) is empty\n" if (! $v);
1280    
1281     return $v;
1282     }
1283    
1284     =head2 id
1285    
1286     Returns unique id of this record
1287    
1288     $id = id();
1289    
1290     Returns C<42/2> for 2nd occurence of MFN 42.
1291    
1292     =cut
1293    
1294     sub id {
1295     my $mfn = $config->{_mfn} || die "no _mfn in config data";
1296     return $mfn . $#{$marc_record} ? $#{$marc_record} + 1 : '';
1297     }
1298    
1299 dpavlin 536 =head2 join_with
1300 dpavlin 13
1301 dpavlin 536 Joins walues with some delimiter
1302 dpavlin 10
1303 dpavlin 536 $v = join_with(", ", @v);
1304 dpavlin 10
1305 dpavlin 536 =cut
1306 dpavlin 10
1307 dpavlin 536 sub join_with {
1308     my $d = shift;
1309 dpavlin 586 warn "### join_with('$d',",dump(@_),")\n" if ($debug > 2);
1310 dpavlin 583 my $v = join($d, grep { defined($_) && $_ ne '' } @_);
1311     return '' unless defined($v);
1312     return $v;
1313 dpavlin 536 }
1314 dpavlin 10
1315 dpavlin 562 =head2 split_rec_on
1316    
1317     Split record subfield on some regex and take one of parts out
1318    
1319     $a_before_semi_column =
1320     split_rec_on('200','a', /\s*;\s*/, $part);
1321    
1322     C<$part> is optional number of element. First element is
1323     B<1>, not 0!
1324    
1325     If there is no C<$part> parameter or C<$part> is 0, this function will
1326     return all values produced by splitting.
1327    
1328     =cut
1329    
1330     sub split_rec_on {
1331     die "split_rec_on need (fld,sf,regex[,part]" if ($#_ < 2);
1332    
1333     my ($fld, $sf, $regex, $part) = @_;
1334 dpavlin 568 warn "### regex ", ref($regex), $regex, $/ if ($debug > 2);
1335 dpavlin 562
1336     my @r = rec( $fld, $sf );
1337     my $v = shift @r;
1338 dpavlin 568 warn "### first rec($fld,$sf) = ",dump($v),$/ if ($debug > 2);
1339 dpavlin 562
1340 dpavlin 604 return '' if ( ! defined($v) || $v =~ /^\s*$/);
1341 dpavlin 566
1342 dpavlin 562 my @s = split( $regex, $v );
1343 dpavlin 568 warn "## split_rec_on($fld,$sf,$regex,$part) = ",dump(@s),$/ if ($debug > 1);
1344 dpavlin 566 if ($part && $part > 0) {
1345 dpavlin 562 return $s[ $part - 1 ];
1346     } else {
1347 dpavlin 571 return @s;
1348 dpavlin 562 }
1349     }
1350    
1351 dpavlin 785 my $hash;
1352    
1353     =head2 set
1354    
1355     set( key => 'value' );
1356    
1357     =cut
1358    
1359     sub set {
1360     my ($k,$v) = @_;
1361 dpavlin 810 warn "## set ( $k => ", dump($v), " )", $/ if ( $debug );
1362 dpavlin 785 $hash->{$k} = $v;
1363     };
1364    
1365     =head2 get
1366    
1367     get( 'key' );
1368    
1369     =cut
1370    
1371     sub get {
1372     my $k = shift || return;
1373     my $v = $hash->{$k};
1374 dpavlin 810 warn "## get $k = ", dump( $v ), $/ if ( $debug );
1375 dpavlin 785 return $v;
1376     }
1377    
1378 dpavlin 791 =head2 count
1379 dpavlin 785
1380 dpavlin 791 if ( count( @result ) == 1 ) {
1381     # do something if only 1 result is there
1382     }
1383    
1384     =cut
1385    
1386     sub count {
1387 dpavlin 810 warn "## count ",dump(@_),$/ if ( $debug );
1388 dpavlin 791 return @_ . '';
1389     }
1390    
1391 dpavlin 536 # END
1392     1;

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