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

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Revision 915 - (hide annotations)
Tue Oct 30 20:27:20 2007 UTC (15 years, 3 months ago) by dpavlin
File size: 30547 byte(s)
 r1376@llin:  dpavlin | 2007-10-30 21:27:19 +0100
 Added back tag for backwards compatiblity

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 912 search_display search display
11    
12 dpavlin 547 marc marc_indicators marc_repeatable_subfield
13 dpavlin 815 marc_compose marc_leader marc_fixed
14 dpavlin 813 marc_duplicate marc_remove marc_count
15 dpavlin 604 marc_original_order
16 dpavlin 540
17 dpavlin 536 rec1 rec2 rec
18     regex prefix suffix surround
19     first lookup join_with
20 dpavlin 707 save_into_lookup
21 dpavlin 562
22     split_rec_on
23 dpavlin 785
24     get set
25 dpavlin 791 count
26 dpavlin 536 /;
27 dpavlin 10
28     use warnings;
29     use strict;
30 dpavlin 536
31     #use base qw/WebPAC::Common/;
32 dpavlin 550 use Data::Dump qw/dump/;
33 dpavlin 574 use Storable qw/dclone/;
34 dpavlin 725 use Carp qw/confess/;
35 dpavlin 10
36 dpavlin 550 # debugging warn(s)
37     my $debug = 0;
38    
39    
40 dpavlin 10 =head1 NAME
41    
42 dpavlin 536 WebPAC::Normalize - describe normalisaton rules using sets
43 dpavlin 10
44     =head1 VERSION
45    
46 dpavlin 912 Version 0.30
47 dpavlin 10
48     =cut
49    
50 dpavlin 912 our $VERSION = '0.30';
51 dpavlin 10
52     =head1 SYNOPSIS
53    
54 dpavlin 536 This module uses C<conf/normalize/*.pl> files to perform normalisation
55     from input records using perl functions which are specialized for set
56     processing.
57 dpavlin 10
58 dpavlin 536 Sets are implemented as arrays, and normalisation file is valid perl, which
59     means that you check it's validity before running WebPAC using
60     C<perl -c normalize.pl>.
61 dpavlin 15
62 dpavlin 536 Normalisation can generate multiple output normalized data. For now, supported output
63 dpavlin 912 types (on the left side of definition) are: C<search_display>, C<display>, C<search> and
64 dpavlin 547 C<marc>.
65 dpavlin 15
66 dpavlin 10 =head1 FUNCTIONS
67    
68 dpavlin 538 Functions which start with C<_> are private and used by WebPAC internally.
69     All other functions are available for use within normalisation rules.
70    
71 dpavlin 536 =head2 data_structure
72 dpavlin 10
73 dpavlin 536 Return data structure
74 dpavlin 13
75 dpavlin 538 my $ds = WebPAC::Normalize::data_structure(
76 dpavlin 725 lookup => $lookup_hash,
77 dpavlin 536 row => $row,
78     rules => $normalize_pl_config,
79 dpavlin 541 marc_encoding => 'utf-8',
80 dpavlin 595 config => $config,
81 dpavlin 736 load_row_coderef => sub {
82 dpavlin 725 my ($database,$input,$mfn) = shift;
83 dpavlin 736 $store->load_row( database => $database, input => $input, id => $mfn );
84 dpavlin 725 },
85 dpavlin 13 );
86    
87 dpavlin 707 Options C<row>, C<rules> and C<log> are mandatory while all
88 dpavlin 540 other are optional.
89    
90 dpavlin 736 C<load_row_coderef> is closure only used when executing lookups, so they will
91 dpavlin 725 die if it's not defined.
92    
93 dpavlin 536 This function will B<die> if normalizastion can't be evaled.
94 dpavlin 15
95 dpavlin 538 Since this function isn't exported you have to call it with
96     C<WebPAC::Normalize::data_structure>.
97    
98 dpavlin 10 =cut
99    
100 dpavlin 736 my $load_row_coderef;
101 dpavlin 725
102 dpavlin 536 sub data_structure {
103     my $arg = {@_};
104 dpavlin 13
105 dpavlin 536 die "need row argument" unless ($arg->{row});
106     die "need normalisation argument" unless ($arg->{rules});
107 dpavlin 31
108 dpavlin 536 no strict 'subs';
109 dpavlin 730 _set_lookup( $arg->{lookup} ) if defined($arg->{lookup});
110 dpavlin 538 _set_rec( $arg->{row} );
111 dpavlin 730 _set_config( $arg->{config} ) if defined($arg->{config});
112 dpavlin 541 _clean_ds( %{ $arg } );
113 dpavlin 736 $load_row_coderef = $arg->{load_row_coderef};
114 dpavlin 725
115 dpavlin 536 eval "$arg->{rules}";
116     die "error evaling $arg->{rules}: $@\n" if ($@);
117 dpavlin 540
118 dpavlin 538 return _get_ds();
119 dpavlin 10 }
120    
121 dpavlin 538 =head2 _set_rec
122 dpavlin 13
123 dpavlin 536 Set current record hash
124 dpavlin 433
125 dpavlin 538 _set_rec( $rec );
126 dpavlin 433
127     =cut
128    
129 dpavlin 536 my $rec;
130 dpavlin 433
131 dpavlin 538 sub _set_rec {
132 dpavlin 536 $rec = shift or die "no record hash";
133 dpavlin 433 }
134    
135 dpavlin 595 =head2 _set_config
136    
137     Set current config hash
138    
139     _set_config( $config );
140    
141     Magic keys are:
142    
143     =over 4
144    
145     =item _
146    
147     Code of current database
148    
149     =item _mfn
150    
151     Current MFN
152    
153     =back
154    
155     =cut
156    
157     my $config;
158    
159     sub _set_config {
160     $config = shift;
161     }
162    
163 dpavlin 538 =head2 _get_ds
164    
165     Return hash formatted as data structure
166    
167     my $ds = _get_ds();
168    
169     =cut
170    
171 dpavlin 812 my ($out, $marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators, $marc_leader);
172 dpavlin 574 my ($marc_record_offset, $marc_fetch_offset) = (0, 0);
173 dpavlin 538
174     sub _get_ds {
175     return $out;
176     }
177    
178     =head2 _clean_ds
179    
180     Clean data structure hash for next record
181    
182     _clean_ds();
183    
184     =cut
185    
186     sub _clean_ds {
187 dpavlin 541 my $a = {@_};
188 dpavlin 812 ($out,$marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators, $marc_leader) = ();
189 dpavlin 574 ($marc_record_offset, $marc_fetch_offset) = (0,0);
190 dpavlin 541 $marc_encoding = $a->{marc_encoding};
191 dpavlin 538 }
192    
193     =head2 _set_lookup
194    
195     Set current lookup hash
196    
197     _set_lookup( $lookup );
198    
199     =cut
200    
201     my $lookup;
202    
203     sub _set_lookup {
204     $lookup = shift;
205     }
206    
207 dpavlin 707 =head2 _get_lookup
208    
209     Get current lookup hash
210    
211     my $lookup = _get_lookup();
212    
213     =cut
214    
215     sub _get_lookup {
216     return $lookup;
217     }
218    
219 dpavlin 736 =head2 _set_load_row
220 dpavlin 725
221     Setup code reference which will return L<data_structure> from
222     L<WebPAC::Store>
223    
224 dpavlin 736 _set_load_row(sub {
225 dpavlin 725 my ($database,$input,$mfn) = @_;
226 dpavlin 736 $store->load_row( database => $database, input => $input, id => $mfn );
227 dpavlin 725 });
228    
229     =cut
230    
231 dpavlin 736 sub _set_load_row {
232 dpavlin 725 my $coderef = shift;
233     confess "argument isn't CODE" unless ref($coderef) eq 'CODE';
234    
235 dpavlin 736 $load_row_coderef = $coderef;
236 dpavlin 725 }
237    
238 dpavlin 547 =head2 _get_marc_fields
239 dpavlin 540
240 dpavlin 547 Get all fields defined by calls to C<marc>
241 dpavlin 540
242 dpavlin 547 $marc->add_fields( WebPAC::Normalize:_get_marc_fields() );
243 dpavlin 540
244 dpavlin 543 We are using I<magic> which detect repeatable fields only from
245     sequence of field/subfield data generated by normalization.
246    
247 dpavlin 554 Repeatable field is created when there is second occurence of same subfield or
248     if any of indicators are different.
249 dpavlin 543
250 dpavlin 554 This is sane for most cases. Something like:
251 dpavlin 543
252 dpavlin 554 900a-1 900b-1 900c-1
253     900a-2 900b-2
254     900a-3
255    
256     will be created from any combination of:
257    
258     900a-1 900a-2 900a-3 900b-1 900b-2 900c-1
259    
260     and following rules:
261    
262     marc('900','a', rec('200','a') );
263     marc('900','b', rec('200','b') );
264     marc('900','c', rec('200','c') );
265    
266     which might not be what you have in mind. If you need repeatable subfield,
267     define it using C<marc_repeatable_subfield> like this:
268    
269 dpavlin 574 marc_repeatable_subfield('900','a');
270     marc('900','a', rec('200','a') );
271     marc('900','b', rec('200','b') );
272     marc('900','c', rec('200','c') );
273 dpavlin 554
274 dpavlin 574 will create:
275    
276     900a-1 900a-2 900a-3 900b-1 900c-1
277     900b-2
278    
279     There is also support for returning next or specific using:
280    
281     while (my $mf = WebPAC::Normalize:_get_marc_fields( fetch_next => 1 ) ) {
282     # do something with $mf
283     }
284    
285     will always return fields from next MARC record or
286    
287     my $mf = WebPAC::Normalize::_get_marc_fields( offset => 42 );
288    
289     will return 42th copy record (if it exists).
290    
291 dpavlin 540 =cut
292    
293 dpavlin 813 my $fetch_pos;
294    
295 dpavlin 547 sub _get_marc_fields {
296 dpavlin 550
297 dpavlin 574 my $arg = {@_};
298     warn "### _get_marc_fields arg: ", dump($arg), $/ if ($debug > 2);
299 dpavlin 813 $fetch_pos = $marc_fetch_offset;
300 dpavlin 574 if ($arg->{offset}) {
301 dpavlin 813 $fetch_pos = $arg->{offset};
302 dpavlin 574 } elsif($arg->{fetch_next}) {
303     $marc_fetch_offset++;
304     }
305 dpavlin 550
306 dpavlin 574 return if (! $marc_record || ref($marc_record) ne 'ARRAY');
307    
308     warn "### full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 2);
309    
310 dpavlin 813 my $marc_rec = $marc_record->[ $fetch_pos ];
311 dpavlin 574
312 dpavlin 813 warn "## _get_marc_fields (at offset: $fetch_pos) -- marc_record = ", dump( @$marc_rec ), $/ if ($debug > 1);
313 dpavlin 574
314     return if (! $marc_rec || ref($marc_rec) ne 'ARRAY' || $#{ $marc_rec } < 0);
315    
316 dpavlin 550 # first, sort all existing fields
317     # XXX might not be needed, but modern perl might randomize elements in hash
318     my @sorted_marc_record = sort {
319 dpavlin 572 $a->[0] . ( $a->[3] || '' ) cmp $b->[0] . ( $b->[3] || '')
320 dpavlin 574 } @{ $marc_rec };
321 dpavlin 550
322 dpavlin 574 @sorted_marc_record = @{ $marc_rec }; ### FIXME disable sorting
323 dpavlin 562
324 dpavlin 550 # output marc fields
325 dpavlin 542 my @m;
326 dpavlin 550
327     # count unique field-subfields (used for offset when walking to next subfield)
328     my $u;
329 dpavlin 572 map { $u->{ $_->[0] . ( $_->[3] || '') }++ } @sorted_marc_record;
330 dpavlin 550
331     if ($debug) {
332 dpavlin 574 warn "## marc_repeatable_subfield = ", dump( $marc_repeatable_subfield ), $/ if ( $marc_repeatable_subfield );
333 dpavlin 813 warn "## marc_record[$fetch_pos] = ", dump( $marc_rec ), $/;
334 dpavlin 574 warn "## sorted_marc_record = ", dump( \@sorted_marc_record ), $/;
335     warn "## subfield count = ", dump( $u ), $/;
336 dpavlin 550 }
337    
338     my $len = $#sorted_marc_record;
339     my $visited;
340     my $i = 0;
341     my $field;
342    
343     foreach ( 0 .. $len ) {
344    
345     # find next element which isn't visited
346     while ($visited->{$i}) {
347     $i = ($i + 1) % ($len + 1);
348 dpavlin 542 }
349    
350 dpavlin 550 # mark it visited
351     $visited->{$i}++;
352    
353 dpavlin 574 my $row = dclone( $sorted_marc_record[$i] );
354 dpavlin 550
355     # field and subfield which is key for
356     # marc_repeatable_subfield and u
357 dpavlin 572 my $fsf = $row->[0] . ( $row->[3] || '' );
358 dpavlin 550
359     if ($debug > 1) {
360    
361     print "### field so far [", $#$field, "] : ", dump( $field ), " ", $field ? 'T' : 'F', $/;
362     print "### this [$i]: ", dump( $row ),$/;
363     print "### sf: ", $row->[3], " vs ", $field->[3],
364     $marc_repeatable_subfield->{ $row->[0] . $row->[3] } ? ' (repeatable)' : '', $/,
365     if ($#$field >= 0);
366    
367     }
368    
369     # if field exists
370     if ( $#$field >= 0 ) {
371     if (
372     $row->[0] ne $field->[0] || # field
373     $row->[1] ne $field->[1] || # i1
374     $row->[2] ne $field->[2] # i2
375     ) {
376     push @m, $field;
377     warn "## saved/1 ", dump( $field ),$/ if ($debug);
378     $field = $row;
379    
380     } elsif (
381     ( $row->[3] lt $field->[-2] ) # subfield which is not next (e.g. a after c)
382     ||
383     ( $row->[3] eq $field->[-2] && # same subfield, but not repeatable
384     ! $marc_repeatable_subfield->{ $fsf }
385     )
386     ) {
387     push @m, $field;
388     warn "## saved/2 ", dump( $field ),$/ if ($debug);
389     $field = $row;
390    
391     } else {
392     # append new subfields to existing field
393     push @$field, ( $row->[3], $row->[4] );
394     }
395     } else {
396     # insert first field
397     $field = $row;
398     }
399    
400     if (! $marc_repeatable_subfield->{ $fsf }) {
401     # make step to next subfield
402     $i = ($i + $u->{ $fsf } ) % ($len + 1);
403     }
404 dpavlin 542 }
405    
406 dpavlin 550 if ($#$field >= 0) {
407     push @m, $field;
408     warn "## saved/3 ", dump( $field ),$/ if ($debug);
409     }
410 dpavlin 542
411 dpavlin 579 return \@m;
412 dpavlin 540 }
413    
414 dpavlin 813 =head2 _get_marc_leader
415    
416     Return leader from currently fetched record by L</_get_marc_fields>
417    
418     print WebPAC::Normalize::_get_marc_leader();
419    
420     =cut
421    
422     sub _get_marc_leader {
423     die "no fetch_pos, did you called _get_marc_fields first?" unless ( defined( $fetch_pos ) );
424     return $marc_leader->[ $fetch_pos ];
425     }
426    
427 dpavlin 554 =head2 _debug
428    
429     Change level of debug warnings
430    
431     _debug( 2 );
432    
433     =cut
434    
435     sub _debug {
436     my $l = shift;
437     return $debug unless defined($l);
438 dpavlin 568 warn "debug level $l",$/ if ($l > 0);
439 dpavlin 554 $debug = $l;
440     }
441    
442 dpavlin 540 =head1 Functions to create C<data_structure>
443    
444     Those functions generally have to first in your normalization file.
445    
446 dpavlin 912 =head2 search_display
447 dpavlin 433
448 dpavlin 912 Define output for L<search> and L<display> at the same time
449 dpavlin 433
450 dpavlin 912 search_display('Title', rec('200','a') );
451 dpavlin 13
452    
453     =cut
454    
455 dpavlin 912 sub search_display {
456     my $name = shift or die "search_display needs name as first argument";
457 dpavlin 536 my @o = grep { defined($_) && $_ ne '' } @_;
458     return unless (@o);
459     $out->{$name}->{search} = \@o;
460     $out->{$name}->{display} = \@o;
461     }
462 dpavlin 13
463 dpavlin 915 =head2 tag
464    
465     Old name for L<search_display>, but supported
466    
467     =cut
468    
469     sub tag {
470     search_display( @_ );
471     }
472    
473 dpavlin 536 =head2 display
474 dpavlin 13
475 dpavlin 912 Define output just for I<display>
476 dpavlin 125
477 dpavlin 536 @v = display('Title', rec('200','a') );
478 dpavlin 125
479 dpavlin 536 =cut
480 dpavlin 125
481 dpavlin 536 sub display {
482     my $name = shift or die "display needs name as first argument";
483     my @o = grep { defined($_) && $_ ne '' } @_;
484     return unless (@o);
485     $out->{$name}->{display} = \@o;
486     }
487 dpavlin 13
488 dpavlin 536 =head2 search
489 dpavlin 13
490 dpavlin 536 Prepare values just for I<search>
491 dpavlin 13
492 dpavlin 536 @v = search('Title', rec('200','a') );
493 dpavlin 433
494 dpavlin 536 =cut
495 dpavlin 13
496 dpavlin 536 sub search {
497     my $name = shift or die "search needs name as first argument";
498     my @o = grep { defined($_) && $_ ne '' } @_;
499     return unless (@o);
500     $out->{$name}->{search} = \@o;
501 dpavlin 13 }
502    
503 dpavlin 564 =head2 marc_leader
504    
505     Setup fields within MARC leader or get leader
506    
507     marc_leader('05','c');
508     my $leader = marc_leader();
509    
510     =cut
511    
512     sub marc_leader {
513     my ($offset,$value) = @_;
514    
515     if ($offset) {
516 dpavlin 813 $marc_leader->[ $marc_record_offset ]->{ $offset } = $value;
517 dpavlin 564 } else {
518 dpavlin 813
519     if (defined($marc_leader)) {
520     die "marc_leader not array = ", dump( $marc_leader ) unless (ref($marc_leader) eq 'ARRAY');
521     return $marc_leader->[ $marc_record_offset ];
522     } else {
523     return;
524     }
525 dpavlin 564 }
526     }
527    
528 dpavlin 815 =head2 marc_fixed
529    
530     Create control/indentifier fields with values in fixed positions
531    
532     marc_fixed('008', 00, '070402');
533     marc_fixed('008', 39, '|');
534    
535     Positions not specified will be filled with spaces (C<0x20>).
536    
537     There will be no effort to extend last specified value to full length of
538     field in standard.
539    
540     =cut
541    
542     sub marc_fixed {
543     my ($f, $pos, $val) = @_;
544     die "need marc(field, position, value)" unless defined($f) && defined($pos);
545    
546 dpavlin 889 confess "need val" unless defined $val;
547    
548 dpavlin 815 my $update = 0;
549    
550     map {
551     if ($_->[0] eq $f) {
552     my $old = $_->[1];
553 dpavlin 889 if (length($old) <= $pos) {
554 dpavlin 815 $_->[1] .= ' ' x ( $pos - length($old) ) . $val;
555 dpavlin 817 warn "## marc_fixed($f,$pos,'$val') append '$old' -> '$_->[1]'\n" if ($debug > 1);
556 dpavlin 815 } else {
557     $_->[1] = substr($old, 0, $pos) . $val . substr($old, $pos + length($val));
558 dpavlin 817 warn "## marc_fixed($f,$pos,'$val') update '$old' -> '$_->[1]'\n" if ($debug > 1);
559 dpavlin 815 }
560     $update++;
561     }
562     } @{ $marc_record->[ $marc_record_offset ] };
563    
564     if (! $update) {
565     my $v = ' ' x $pos . $val;
566     push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $v ];
567 dpavlin 817 warn "## marc_fixed($f,$pos,'val') created '$v'\n" if ($debug > 1);
568 dpavlin 815 }
569     }
570    
571 dpavlin 547 =head2 marc
572 dpavlin 540
573     Save value for MARC field
574    
575 dpavlin 547 marc('900','a', rec('200','a') );
576 dpavlin 571 marc('001', rec('000') );
577 dpavlin 540
578     =cut
579    
580 dpavlin 547 sub marc {
581     my $f = shift or die "marc needs field";
582     die "marc field must be numer" unless ($f =~ /^\d+$/);
583 dpavlin 540
584 dpavlin 571 my $sf;
585     if ($f >= 10) {
586     $sf = shift or die "marc needs subfield";
587     }
588 dpavlin 540
589 dpavlin 541 foreach (@_) {
590     my $v = $_; # make var read-write for Encode
591 dpavlin 543 next unless (defined($v) && $v !~ /^\s*$/);
592 dpavlin 548 my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
593 dpavlin 571 if (defined $sf) {
594 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $i1, $i2, $sf => $v ];
595 dpavlin 571 } else {
596 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $v ];
597 dpavlin 571 }
598 dpavlin 540 }
599     }
600    
601 dpavlin 547 =head2 marc_repeatable_subfield
602    
603     Save values for MARC repetable subfield
604    
605     marc_repeatable_subfield('910', 'z', rec('909') );
606    
607     =cut
608    
609     sub marc_repeatable_subfield {
610 dpavlin 550 my ($f,$sf) = @_;
611     die "marc_repeatable_subfield need field and subfield!\n" unless ($f && $sf);
612     $marc_repeatable_subfield->{ $f . $sf }++;
613 dpavlin 547 marc(@_);
614     }
615    
616     =head2 marc_indicators
617    
618     Set both indicators for MARC field
619    
620     marc_indicators('900', ' ', 1);
621    
622     Any indicator value other than C<0-9> will be treated as undefined.
623    
624     =cut
625    
626     sub marc_indicators {
627     my $f = shift || die "marc_indicators need field!\n";
628     my ($i1,$i2) = @_;
629     die "marc_indicators($f, ...) need i1!\n" unless(defined($i1));
630     die "marc_indicators($f, $i1, ...) need i2!\n" unless(defined($i2));
631    
632     $i1 = ' ' if ($i1 !~ /^\d$/);
633     $i2 = ' ' if ($i2 !~ /^\d$/);
634 dpavlin 548 @{ $marc_indicators->{$f} } = ($i1,$i2);
635 dpavlin 547 }
636    
637 dpavlin 562 =head2 marc_compose
638 dpavlin 547
639 dpavlin 562 Save values for each MARC subfield explicitly
640    
641     marc_compose('900',
642     'a', rec('200','a')
643     'b', rec('201','a')
644     'a', rec('200','b')
645     'c', rec('200','c')
646     );
647    
648 dpavlin 603 If you specify C<+> for subfield, value will be appended
649     to previous defined subfield.
650    
651 dpavlin 562 =cut
652    
653     sub marc_compose {
654     my $f = shift or die "marc_compose needs field";
655     die "marc_compose field must be numer" unless ($f =~ /^\d+$/);
656    
657     my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
658     my $m = [ $f, $i1, $i2 ];
659    
660 dpavlin 583 warn "### marc_compose input subfields = ", dump(@_),$/ if ($debug > 2);
661    
662 dpavlin 619 if ($#_ % 2 != 1) {
663     die "ERROR: marc_compose",dump($f,@_)," not valid (must be even).\nDo you need to add first() or join() around some argument?\n";
664     }
665    
666 dpavlin 562 while (@_) {
667 dpavlin 619 my $sf = shift;
668 dpavlin 565 my $v = shift;
669 dpavlin 562
670     next unless (defined($v) && $v !~ /^\s*$/);
671 dpavlin 568 warn "## ++ marc_compose($f,$sf,$v) ", dump( $m ),$/ if ($debug > 1);
672 dpavlin 603 if ($sf ne '+') {
673     push @$m, ( $sf, $v );
674     } else {
675     $m->[ $#$m ] .= $v;
676     }
677 dpavlin 562 }
678    
679 dpavlin 586 warn "## marc_compose current marc = ", dump( $m ),$/ if ($debug > 1);
680 dpavlin 562
681 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, $m if ($#{$m} > 2);
682 dpavlin 562 }
683    
684 dpavlin 574 =head2 marc_duplicate
685 dpavlin 562
686 dpavlin 574 Generate copy of current MARC record and continue working on copy
687    
688     marc_duplicate();
689    
690     Copies can be accessed using C<< _get_marc_fields( fetch_next => 1 ) >> or
691     C<< _get_marc_fields( offset => 42 ) >>.
692    
693     =cut
694    
695     sub marc_duplicate {
696     my $m = $marc_record->[ -1 ];
697     die "can't duplicate record which isn't defined" unless ($m);
698     push @{ $marc_record }, dclone( $m );
699 dpavlin 813 push @{ $marc_leader }, dclone( marc_leader() );
700     warn "## marc_duplicate = ", dump(@$marc_leader, @$marc_record), $/ if ($debug > 1);
701 dpavlin 574 $marc_record_offset = $#{ $marc_record };
702     warn "## marc_record_offset = $marc_record_offset", $/ if ($debug > 1);
703 dpavlin 813
704 dpavlin 574 }
705    
706     =head2 marc_remove
707    
708     Remove some field or subfield from MARC record.
709    
710     marc_remove('200');
711     marc_remove('200','a');
712    
713     This will erase field C<200> or C<200^a> from current MARC record.
714    
715 dpavlin 786 marc_remove('*');
716    
717     Will remove all fields in current MARC record.
718    
719 dpavlin 574 This is useful after calling C<marc_duplicate> or on it's own (but, you
720     should probably just remove that subfield definition if you are not
721     using C<marc_duplicate>).
722    
723     FIXME: support fields < 10.
724    
725     =cut
726    
727     sub marc_remove {
728     my ($f, $sf) = @_;
729    
730     die "marc_remove needs record number" unless defined($f);
731    
732     my $marc = $marc_record->[ $marc_record_offset ];
733    
734     warn "### marc_remove before = ", dump( $marc ), $/ if ($debug > 2);
735    
736 dpavlin 786 if ($f eq '*') {
737    
738     delete( $marc_record->[ $marc_record_offset ] );
739 dpavlin 788 warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
740 dpavlin 786
741     } else {
742    
743     my $i = 0;
744     foreach ( 0 .. $#{ $marc } ) {
745     last unless (defined $marc->[$i]);
746     warn "#### working on ",dump( @{ $marc->[$i] }), $/ if ($debug > 3);
747     if ($marc->[$i]->[0] eq $f) {
748     if (! defined $sf) {
749     # remove whole field
750     splice @$marc, $i, 1;
751     warn "#### slice \@\$marc, $i, 1 = ",dump( @{ $marc }), $/ if ($debug > 3);
752     $i--;
753     } else {
754     foreach my $j ( 0 .. (( $#{ $marc->[$i] } - 3 ) / 2) ) {
755     my $o = ($j * 2) + 3;
756     if ($marc->[$i]->[$o] eq $sf) {
757     # remove subfield
758     splice @{$marc->[$i]}, $o, 2;
759     warn "#### slice \@{\$marc->[$i]}, $o, 2 = ", dump( @{ $marc }), $/ if ($debug > 3);
760     # is record now empty?
761     if ($#{ $marc->[$i] } == 2) {
762     splice @$marc, $i, 1;
763     warn "#### slice \@\$marc, $i, 1 = ", dump( @{ $marc }), $/ if ($debug > 3);
764     $i--;
765     };
766     }
767 dpavlin 574 }
768     }
769     }
770 dpavlin 786 $i++;
771 dpavlin 574 }
772 dpavlin 786
773     warn "### marc_remove($f", $sf ? ",$sf" : "", ") after = ", dump( $marc ), $/ if ($debug > 2);
774    
775     $marc_record->[ $marc_record_offset ] = $marc;
776 dpavlin 574 }
777    
778     warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
779     }
780    
781 dpavlin 604 =head2 marc_original_order
782    
783     Copy all subfields preserving original order to marc field.
784    
785 dpavlin 616 marc_original_order( marc_field_number, original_input_field_number );
786 dpavlin 604
787 dpavlin 616 Please note that field numbers are consistent with other commands (marc
788     field number first), but somewhat counter-intuitive (destination and then
789     source).
790    
791 dpavlin 604 You might want to use this command if you are just renaming subfields or
792     using pre-processing modify_record in C<config.yml> and don't need any
793     post-processing or want to preserve order of original subfields.
794    
795 dpavlin 616
796 dpavlin 604 =cut
797    
798     sub marc_original_order {
799    
800 dpavlin 616 my ($to, $from) = @_;
801 dpavlin 604 die "marc_original_order needs from and to fields\n" unless ($from && $to);
802    
803 dpavlin 616 return unless defined($rec->{$from});
804    
805     my $r = $rec->{$from};
806 dpavlin 604 die "record field $from isn't array\n" unless (ref($r) eq 'ARRAY');
807    
808     my ($i1,$i2) = defined($marc_indicators->{$to}) ? @{ $marc_indicators->{$to} } : (' ',' ');
809 dpavlin 616 warn "## marc_original_order($to,$from) source = ", dump( $r ),$/ if ($debug > 1);
810 dpavlin 604
811     foreach my $d (@$r) {
812    
813 dpavlin 605 if (! defined($d->{subfields}) && ref($d->{subfields}) ne 'ARRAY') {
814 dpavlin 616 warn "# marc_original_order($to,$from): field $from doesn't have subfields specification\n";
815 dpavlin 605 next;
816     }
817    
818 dpavlin 604 my @sfs = @{ $d->{subfields} };
819    
820     die "field $from doesn't have even number of subfields specifications\n" unless($#sfs % 2 == 1);
821    
822 dpavlin 618 warn "#--> d: ",dump($d), "\n#--> sfs: ",dump(@sfs),$/ if ($debug > 2);
823 dpavlin 604
824     my $m = [ $to, $i1, $i2 ];
825    
826     while (my $sf = shift @sfs) {
827 dpavlin 618
828     warn "#--> sf: ",dump($sf), $/ if ($debug > 2);
829 dpavlin 604 my $offset = shift @sfs;
830     die "corrupted sufields specification for field $from\n" unless defined($offset);
831    
832     my $v;
833     if (ref($d->{$sf}) eq 'ARRAY') {
834     $v = $d->{$sf}->[$offset] if (defined($d->{$sf}->[$offset]));
835     } elsif ($offset == 0) {
836     $v = $d->{$sf};
837     } else {
838     die "field $from subfield '$sf' need occurence $offset which doesn't exist", dump($d->{$sf});
839     }
840     push @$m, ( $sf, $v ) if (defined($v));
841     }
842    
843     if ($#{$m} > 2) {
844     push @{ $marc_record->[ $marc_record_offset ] }, $m;
845     }
846     }
847    
848     warn "## marc_record = ", dump( $marc_record ),$/ if ($debug > 1);
849     }
850    
851 dpavlin 813 =head2 marc_count
852 dpavlin 604
853 dpavlin 813 Return number of MARC records created using L</marc_duplicate>.
854    
855     print "created ", marc_count(), " records";
856    
857     =cut
858    
859     sub marc_count {
860     return $#{ $marc_record };
861     }
862    
863    
864 dpavlin 540 =head1 Functions to extract data from input
865    
866     This function should be used inside functions to create C<data_structure> described
867     above.
868    
869 dpavlin 641 =head2 _pack_subfields_hash
870    
871 dpavlin 669 @subfields = _pack_subfields_hash( $h );
872     $subfields = _pack_subfields_hash( $h, 1 );
873 dpavlin 641
874 dpavlin 669 Return each subfield value in array or pack them all together and return scalar
875     with subfields (denoted by C<^>) and values.
876    
877 dpavlin 641 =cut
878    
879     sub _pack_subfields_hash {
880    
881 dpavlin 642 warn "## _pack_subfields_hash( ",dump(@_), " )\n" if ($debug > 1);
882 dpavlin 641
883     my ($h,$include_subfields) = @_;
884    
885 dpavlin 831 # sanity and ease of use
886     return $h if (ref($h) ne 'HASH');
887    
888 dpavlin 641 if ( defined($h->{subfields}) ) {
889     my $sfs = delete $h->{subfields} || die "no subfields?";
890     my @out;
891     while (@$sfs) {
892     my $sf = shift @$sfs;
893     push @out, '^' . $sf if ($include_subfields);
894     my $o = shift @$sfs;
895     if ($o == 0 && ref( $h->{$sf} ) ne 'ARRAY' ) {
896     # single element subfields are not arrays
897 dpavlin 669 #warn "====> $sf $o / $#$sfs ", dump( $sfs, $h->{$sf} ), "\n";
898 dpavlin 667
899 dpavlin 641 push @out, $h->{$sf};
900     } else {
901 dpavlin 669 #warn "====> $sf $o / $#$sfs ", dump( $sfs, $h->{$sf} ), "\n";
902 dpavlin 641 push @out, $h->{$sf}->[$o];
903     }
904     }
905 dpavlin 667 if ($include_subfields) {
906     return join('', @out);
907     } else {
908     return @out;
909     }
910 dpavlin 641 } else {
911 dpavlin 667 if ($include_subfields) {
912     my $out = '';
913 dpavlin 668 foreach my $sf (sort keys %$h) {
914 dpavlin 667 if (ref($h->{$sf}) eq 'ARRAY') {
915     $out .= '^' . $sf . join('^' . $sf, @{ $h->{$sf} });
916     } else {
917     $out .= '^' . $sf . $h->{$sf};
918     }
919     }
920     return $out;
921     } else {
922     # FIXME this should probably be in alphabetical order instead of hash order
923     values %{$h};
924     }
925 dpavlin 641 }
926     }
927    
928 dpavlin 536 =head2 rec1
929 dpavlin 371
930 dpavlin 536 Return all values in some field
931 dpavlin 371
932 dpavlin 536 @v = rec1('200')
933 dpavlin 15
934 dpavlin 536 TODO: order of values is probably same as in source data, need to investigate that
935 dpavlin 15
936 dpavlin 536 =cut
937 dpavlin 15
938 dpavlin 536 sub rec1 {
939     my $f = shift;
940 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
941 dpavlin 536 return unless (defined($rec) && defined($rec->{$f}));
942 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
943 dpavlin 536 if (ref($rec->{$f}) eq 'ARRAY') {
944 dpavlin 641 my @out;
945     foreach my $h ( @{ $rec->{$f} } ) {
946     if (ref($h) eq 'HASH') {
947     push @out, ( _pack_subfields_hash( $h ) );
948 dpavlin 31 } else {
949 dpavlin 641 push @out, $h;
950 dpavlin 31 }
951 dpavlin 641 }
952     return @out;
953 dpavlin 536 } elsif( defined($rec->{$f}) ) {
954     return $rec->{$f};
955 dpavlin 15 }
956     }
957    
958 dpavlin 536 =head2 rec2
959 dpavlin 15
960 dpavlin 536 Return all values in specific field and subfield
961 dpavlin 13
962 dpavlin 536 @v = rec2('200','a')
963 dpavlin 13
964     =cut
965    
966 dpavlin 536 sub rec2 {
967     my $f = shift;
968     return unless (defined($rec && $rec->{$f}));
969     my $sf = shift;
970 dpavlin 601 warn "rec2($f,$sf) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
971 dpavlin 589 return map {
972     if (ref($_->{$sf}) eq 'ARRAY') {
973     @{ $_->{$sf} };
974     } else {
975     $_->{$sf};
976     }
977     } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} };
978 dpavlin 536 }
979 dpavlin 13
980 dpavlin 536 =head2 rec
981 dpavlin 13
982 dpavlin 536 syntaxtic sugar for
983 dpavlin 13
984 dpavlin 536 @v = rec('200')
985     @v = rec('200','a')
986 dpavlin 13
987 dpavlin 750 If rec() returns just single value, it will
988     return scalar, not array.
989    
990 dpavlin 536 =cut
991 dpavlin 373
992 dpavlin 536 sub rec {
993 dpavlin 583 my @out;
994 dpavlin 536 if ($#_ == 0) {
995 dpavlin 583 @out = rec1(@_);
996 dpavlin 536 } elsif ($#_ == 1) {
997 dpavlin 583 @out = rec2(@_);
998 dpavlin 13 }
999 dpavlin 750 if ($#out == 0 && ! wantarray) {
1000     return $out[0];
1001     } elsif (@out) {
1002 dpavlin 583 return @out;
1003     } else {
1004     return '';
1005     }
1006 dpavlin 13 }
1007    
1008 dpavlin 536 =head2 regex
1009 dpavlin 15
1010 dpavlin 536 Apply regex to some or all values
1011 dpavlin 15
1012 dpavlin 536 @v = regex( 's/foo/bar/g', @v );
1013 dpavlin 15
1014     =cut
1015    
1016 dpavlin 536 sub regex {
1017     my $r = shift;
1018     my @out;
1019 dpavlin 550 #warn "r: $r\n", dump(\@_);
1020 dpavlin 536 foreach my $t (@_) {
1021     next unless ($t);
1022     eval "\$t =~ $r";
1023     push @out, $t if ($t && $t ne '');
1024 dpavlin 368 }
1025 dpavlin 536 return @out;
1026 dpavlin 15 }
1027    
1028 dpavlin 536 =head2 prefix
1029 dpavlin 15
1030 dpavlin 536 Prefix all values with a string
1031 dpavlin 15
1032 dpavlin 536 @v = prefix( 'my_', @v );
1033 dpavlin 15
1034     =cut
1035    
1036 dpavlin 536 sub prefix {
1037 dpavlin 819 my $p = shift;
1038     return @_ unless defined( $p );
1039 dpavlin 536 return map { $p . $_ } grep { defined($_) } @_;
1040     }
1041 dpavlin 15
1042 dpavlin 536 =head2 suffix
1043 dpavlin 15
1044 dpavlin 536 suffix all values with a string
1045 dpavlin 15
1046 dpavlin 536 @v = suffix( '_my', @v );
1047 dpavlin 15
1048 dpavlin 536 =cut
1049 dpavlin 15
1050 dpavlin 536 sub suffix {
1051 dpavlin 819 my $s = shift;
1052     return @_ unless defined( $s );
1053 dpavlin 536 return map { $_ . $s } grep { defined($_) } @_;
1054 dpavlin 15 }
1055    
1056 dpavlin 536 =head2 surround
1057 dpavlin 13
1058 dpavlin 536 surround all values with a two strings
1059 dpavlin 13
1060 dpavlin 536 @v = surround( 'prefix_', '_suffix', @v );
1061 dpavlin 13
1062     =cut
1063    
1064 dpavlin 536 sub surround {
1065 dpavlin 819 my $p = shift;
1066     my $s = shift;
1067     $p = '' unless defined( $p );
1068     $s = '' unless defined( $s );
1069 dpavlin 536 return map { $p . $_ . $s } grep { defined($_) } @_;
1070 dpavlin 13 }
1071    
1072 dpavlin 536 =head2 first
1073 dpavlin 13
1074 dpavlin 536 Return first element
1075 dpavlin 15
1076 dpavlin 536 $v = first( @v );
1077 dpavlin 13
1078     =cut
1079    
1080 dpavlin 536 sub first {
1081     my $r = shift;
1082     return $r;
1083 dpavlin 13 }
1084    
1085 dpavlin 536 =head2 lookup
1086 dpavlin 13
1087 dpavlin 536 Consult lookup hashes for some value
1088 dpavlin 13
1089 dpavlin 725 @v = lookup(
1090     sub {
1091     'ffkk/peri/mfn'.rec('000')
1092     },
1093     'ffkk','peri','200-a-200-e',
1094     sub {
1095     first(rec(200,'a')).' '.first(rec('200','e'))
1096     }
1097     );
1098 dpavlin 13
1099 dpavlin 725 Code like above will be B<automatically generated> using L<WebPAC::Parse> from
1100     normal lookup definition in C<conf/lookup/something.pl> which looks like:
1101 dpavlin 707
1102 dpavlin 725 lookup(
1103     # which results to return from record recorded in lookup
1104     sub { 'ffkk/peri/mfn' . rec('000') },
1105     # from which database and input
1106     'ffkk','peri',
1107     # such that following values match
1108     sub { first(rec(200,'a')) . ' ' . first(rec('200','e')) },
1109     # if this part is missing, we will try to match same fields
1110     # from lookup record and current one, or you can override
1111     # which records to use from current record using
1112     sub { rec('900','x') . ' ' . rec('900','y') },
1113     )
1114    
1115     You can think about this lookup as SQL (if that helps):
1116    
1117     select
1118     sub { what }
1119     from
1120     database, input
1121     where
1122     sub { filter from lookuped record }
1123     having
1124     sub { optional filter on current record }
1125    
1126     Easy as pie, right?
1127    
1128 dpavlin 13 =cut
1129    
1130 dpavlin 536 sub lookup {
1131 dpavlin 725 my ($what, $database, $input, $key, $having) = @_;
1132    
1133 dpavlin 766 confess "lookup needs 5 arguments: what, database, input, key, having\n" unless ($#_ == 4);
1134 dpavlin 725
1135 dpavlin 729 warn "## lookup ($database, $input, $key)", $/ if ($debug > 1);
1136 dpavlin 725 return unless (defined($lookup->{$database}->{$input}->{$key}));
1137    
1138 dpavlin 736 confess "lookup really need load_row_coderef added to data_structure\n" unless ($load_row_coderef);
1139 dpavlin 725
1140     my $mfns;
1141     my @having = $having->();
1142    
1143 dpavlin 729 warn "## having = ", dump( @having ) if ($debug > 2);
1144 dpavlin 725
1145     foreach my $h ( @having ) {
1146     if (defined($lookup->{$database}->{$input}->{$key}->{$h})) {
1147 dpavlin 752 warn "lookup for $database/$input/$key/$h return ",dump($lookup->{$database}->{$input}->{$key}->{$h}),"\n" if ($debug);
1148 dpavlin 725 $mfns->{$_}++ foreach keys %{ $lookup->{$database}->{$input}->{$key}->{$h} };
1149     }
1150 dpavlin 536 }
1151 dpavlin 725
1152     return unless ($mfns);
1153    
1154     my @mfns = sort keys %$mfns;
1155    
1156 dpavlin 750 warn "# lookup loading $database/$input/$key mfn ", join(",",@mfns)," having ",dump(@having),"\n" if ($debug);
1157 dpavlin 725
1158     my $old_rec = $rec;
1159     my @out;
1160    
1161     foreach my $mfn (@mfns) {
1162 dpavlin 736 $rec = $load_row_coderef->( $database, $input, $mfn );
1163 dpavlin 725
1164 dpavlin 752 warn "got $database/$input/$mfn = ", dump($rec), $/ if ($debug);
1165 dpavlin 725
1166     my @vals = $what->();
1167    
1168     push @out, ( @vals );
1169    
1170 dpavlin 752 warn "lookup for mfn $mfn returned ", dump(@vals), $/ if ($debug);
1171 dpavlin 725 }
1172    
1173     # if (ref($lookup->{$k}) eq 'ARRAY') {
1174     # return @{ $lookup->{$k} };
1175     # } else {
1176     # return $lookup->{$k};
1177     # }
1178    
1179     $rec = $old_rec;
1180    
1181 dpavlin 750 warn "## lookup returns = ", dump(@out), $/ if ($debug);
1182 dpavlin 725
1183 dpavlin 740 if ($#out == 0) {
1184     return $out[0];
1185     } else {
1186     return @out;
1187     }
1188 dpavlin 13 }
1189    
1190 dpavlin 707 =head2 save_into_lookup
1191    
1192 dpavlin 725 Save value into lookup. It associates current database, input
1193     and specific keys with one or more values which will be
1194     associated over MFN.
1195 dpavlin 707
1196 dpavlin 725 MFN will be extracted from first occurence current of field 000
1197     in current record, or if it doesn't exist from L<_set_config> C<_mfn>.
1198    
1199     my $nr = save_into_lookup($database,$input,$key,sub {
1200 dpavlin 707 # code which produce one or more values
1201     });
1202    
1203 dpavlin 725 It returns number of items saved.
1204 dpavlin 707
1205 dpavlin 725 This function shouldn't be called directly, it's called from code created by
1206     L<WebPAC::Parser>.
1207    
1208 dpavlin 707 =cut
1209    
1210     sub save_into_lookup {
1211 dpavlin 712 my ($database,$input,$key,$coderef) = @_;
1212     die "save_into_lookup needs database" unless defined($database);
1213     die "save_into_lookup needs input" unless defined($input);
1214     die "save_into_lookup needs key" unless defined($key);
1215 dpavlin 707 die "save_into_lookup needs CODE" unless ( defined($coderef) && ref($coderef) eq 'CODE' );
1216 dpavlin 725
1217 dpavlin 729 warn "## save_into_lookup rec = ", dump($rec), " config = ", dump($config), $/ if ($debug > 2);
1218 dpavlin 725
1219     my $mfn =
1220     defined($rec->{'000'}->[0]) ? $rec->{'000'}->[0] :
1221     defined($config->{_mfn}) ? $config->{_mfn} :
1222     die "mfn not defined or zero";
1223    
1224     my $nr = 0;
1225    
1226 dpavlin 707 foreach my $v ( $coderef->() ) {
1227 dpavlin 712 $lookup->{$database}->{$input}->{$key}->{$v}->{$mfn}++;
1228 dpavlin 721 warn "# saved lookup $database/$input/$key [$v] $mfn\n" if ($debug > 1);
1229 dpavlin 725 $nr++;
1230 dpavlin 707 }
1231 dpavlin 725
1232     return $nr;
1233 dpavlin 707 }
1234    
1235 dpavlin 595 =head2 config
1236    
1237     Consult config values stored in C<config.yml>
1238    
1239     # return database code (key under databases in yaml)
1240     $database_code = config(); # use _ from hash
1241     $database_name = config('name');
1242     $database_input_name = config('input name');
1243    
1244     Up to three levels are supported.
1245    
1246     =cut
1247    
1248     sub config {
1249     return unless ($config);
1250    
1251     my $p = shift;
1252    
1253     $p ||= '';
1254    
1255     my $v;
1256    
1257     warn "### getting config($p)\n" if ($debug > 1);
1258    
1259     my @p = split(/\s+/,$p);
1260     if ($#p < 0) {
1261     $v = $config->{ '_' }; # special, database code
1262     } else {
1263    
1264     my $c = dclone( $config );
1265    
1266     foreach my $k (@p) {
1267     warn "### k: $k c = ",dump($c),$/ if ($debug > 1);
1268     if (ref($c) eq 'ARRAY') {
1269     $c = shift @$c;
1270     warn "config($p) taking first occurence of '$k', probably not what you wanted!\n";
1271     last;
1272     }
1273    
1274     if (! defined($c->{$k}) ) {
1275     $c = undef;
1276     last;
1277     } else {
1278     $c = $c->{$k};
1279     }
1280     }
1281     $v = $c if ($c);
1282    
1283     }
1284    
1285     warn "## config( '$p' ) = ",dump( $v ),$/ if ($v && $debug);
1286     warn "config( '$p' ) is empty\n" if (! $v);
1287    
1288     return $v;
1289     }
1290    
1291     =head2 id
1292    
1293     Returns unique id of this record
1294    
1295     $id = id();
1296    
1297     Returns C<42/2> for 2nd occurence of MFN 42.
1298    
1299     =cut
1300    
1301     sub id {
1302     my $mfn = $config->{_mfn} || die "no _mfn in config data";
1303     return $mfn . $#{$marc_record} ? $#{$marc_record} + 1 : '';
1304     }
1305    
1306 dpavlin 536 =head2 join_with
1307 dpavlin 13
1308 dpavlin 536 Joins walues with some delimiter
1309 dpavlin 10
1310 dpavlin 536 $v = join_with(", ", @v);
1311 dpavlin 10
1312 dpavlin 536 =cut
1313 dpavlin 10
1314 dpavlin 536 sub join_with {
1315     my $d = shift;
1316 dpavlin 586 warn "### join_with('$d',",dump(@_),")\n" if ($debug > 2);
1317 dpavlin 583 my $v = join($d, grep { defined($_) && $_ ne '' } @_);
1318     return '' unless defined($v);
1319     return $v;
1320 dpavlin 536 }
1321 dpavlin 10
1322 dpavlin 562 =head2 split_rec_on
1323    
1324     Split record subfield on some regex and take one of parts out
1325    
1326     $a_before_semi_column =
1327     split_rec_on('200','a', /\s*;\s*/, $part);
1328    
1329     C<$part> is optional number of element. First element is
1330     B<1>, not 0!
1331    
1332     If there is no C<$part> parameter or C<$part> is 0, this function will
1333     return all values produced by splitting.
1334    
1335     =cut
1336    
1337     sub split_rec_on {
1338     die "split_rec_on need (fld,sf,regex[,part]" if ($#_ < 2);
1339    
1340     my ($fld, $sf, $regex, $part) = @_;
1341 dpavlin 568 warn "### regex ", ref($regex), $regex, $/ if ($debug > 2);
1342 dpavlin 562
1343     my @r = rec( $fld, $sf );
1344     my $v = shift @r;
1345 dpavlin 568 warn "### first rec($fld,$sf) = ",dump($v),$/ if ($debug > 2);
1346 dpavlin 562
1347 dpavlin 604 return '' if ( ! defined($v) || $v =~ /^\s*$/);
1348 dpavlin 566
1349 dpavlin 562 my @s = split( $regex, $v );
1350 dpavlin 568 warn "## split_rec_on($fld,$sf,$regex,$part) = ",dump(@s),$/ if ($debug > 1);
1351 dpavlin 566 if ($part && $part > 0) {
1352 dpavlin 562 return $s[ $part - 1 ];
1353     } else {
1354 dpavlin 571 return @s;
1355 dpavlin 562 }
1356     }
1357    
1358 dpavlin 785 my $hash;
1359    
1360     =head2 set
1361    
1362     set( key => 'value' );
1363    
1364     =cut
1365    
1366     sub set {
1367     my ($k,$v) = @_;
1368 dpavlin 810 warn "## set ( $k => ", dump($v), " )", $/ if ( $debug );
1369 dpavlin 785 $hash->{$k} = $v;
1370     };
1371    
1372     =head2 get
1373    
1374     get( 'key' );
1375    
1376     =cut
1377    
1378     sub get {
1379     my $k = shift || return;
1380     my $v = $hash->{$k};
1381 dpavlin 810 warn "## get $k = ", dump( $v ), $/ if ( $debug );
1382 dpavlin 785 return $v;
1383     }
1384    
1385 dpavlin 791 =head2 count
1386 dpavlin 785
1387 dpavlin 791 if ( count( @result ) == 1 ) {
1388     # do something if only 1 result is there
1389     }
1390    
1391     =cut
1392    
1393     sub count {
1394 dpavlin 810 warn "## count ",dump(@_),$/ if ( $debug );
1395 dpavlin 791 return @_ . '';
1396     }
1397    
1398 dpavlin 536 # END
1399     1;

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