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

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Revision 813 - (hide annotations)
Sun Apr 1 21:47:47 2007 UTC (15 years, 10 months ago) by dpavlin
File size: 29293 byte(s)
 r1184@llin:  dpavlin | 2007-04-01 23:47:04 +0200
  r1182@llin:  dpavlin | 2007-04-01 23:44:03 +0200
  marc_duplicate now correctly duplicates leader data, new _get_marc_leader to
  return leader corresponding to last _get_marc_fields call, added marc_count
  which returns number of created MARC records
 

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 564 marc_compose marc_leader
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 813 Version 0.27
46 dpavlin 10
47     =cut
48    
49 dpavlin 813 our $VERSION = '0.27';
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 547 =head2 marc
521 dpavlin 540
522     Save value for MARC field
523    
524 dpavlin 547 marc('900','a', rec('200','a') );
525 dpavlin 571 marc('001', rec('000') );
526 dpavlin 540
527     =cut
528    
529 dpavlin 547 sub marc {
530     my $f = shift or die "marc needs field";
531     die "marc field must be numer" unless ($f =~ /^\d+$/);
532 dpavlin 540
533 dpavlin 571 my $sf;
534     if ($f >= 10) {
535     $sf = shift or die "marc needs subfield";
536     }
537 dpavlin 540
538 dpavlin 541 foreach (@_) {
539     my $v = $_; # make var read-write for Encode
540 dpavlin 543 next unless (defined($v) && $v !~ /^\s*$/);
541 dpavlin 548 my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
542 dpavlin 571 if (defined $sf) {
543 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $i1, $i2, $sf => $v ];
544 dpavlin 571 } else {
545 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $v ];
546 dpavlin 571 }
547 dpavlin 540 }
548     }
549    
550 dpavlin 547 =head2 marc_repeatable_subfield
551    
552     Save values for MARC repetable subfield
553    
554     marc_repeatable_subfield('910', 'z', rec('909') );
555    
556     =cut
557    
558     sub marc_repeatable_subfield {
559 dpavlin 550 my ($f,$sf) = @_;
560     die "marc_repeatable_subfield need field and subfield!\n" unless ($f && $sf);
561     $marc_repeatable_subfield->{ $f . $sf }++;
562 dpavlin 547 marc(@_);
563     }
564    
565     =head2 marc_indicators
566    
567     Set both indicators for MARC field
568    
569     marc_indicators('900', ' ', 1);
570    
571     Any indicator value other than C<0-9> will be treated as undefined.
572    
573     =cut
574    
575     sub marc_indicators {
576     my $f = shift || die "marc_indicators need field!\n";
577     my ($i1,$i2) = @_;
578     die "marc_indicators($f, ...) need i1!\n" unless(defined($i1));
579     die "marc_indicators($f, $i1, ...) need i2!\n" unless(defined($i2));
580    
581     $i1 = ' ' if ($i1 !~ /^\d$/);
582     $i2 = ' ' if ($i2 !~ /^\d$/);
583 dpavlin 548 @{ $marc_indicators->{$f} } = ($i1,$i2);
584 dpavlin 547 }
585    
586 dpavlin 562 =head2 marc_compose
587 dpavlin 547
588 dpavlin 562 Save values for each MARC subfield explicitly
589    
590     marc_compose('900',
591     'a', rec('200','a')
592     'b', rec('201','a')
593     'a', rec('200','b')
594     'c', rec('200','c')
595     );
596    
597 dpavlin 603 If you specify C<+> for subfield, value will be appended
598     to previous defined subfield.
599    
600 dpavlin 562 =cut
601    
602     sub marc_compose {
603     my $f = shift or die "marc_compose needs field";
604     die "marc_compose field must be numer" unless ($f =~ /^\d+$/);
605    
606     my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
607     my $m = [ $f, $i1, $i2 ];
608    
609 dpavlin 583 warn "### marc_compose input subfields = ", dump(@_),$/ if ($debug > 2);
610    
611 dpavlin 619 if ($#_ % 2 != 1) {
612     die "ERROR: marc_compose",dump($f,@_)," not valid (must be even).\nDo you need to add first() or join() around some argument?\n";
613     }
614    
615 dpavlin 562 while (@_) {
616 dpavlin 619 my $sf = shift;
617 dpavlin 565 my $v = shift;
618 dpavlin 562
619     next unless (defined($v) && $v !~ /^\s*$/);
620 dpavlin 568 warn "## ++ marc_compose($f,$sf,$v) ", dump( $m ),$/ if ($debug > 1);
621 dpavlin 603 if ($sf ne '+') {
622     push @$m, ( $sf, $v );
623     } else {
624     $m->[ $#$m ] .= $v;
625     }
626 dpavlin 562 }
627    
628 dpavlin 586 warn "## marc_compose current marc = ", dump( $m ),$/ if ($debug > 1);
629 dpavlin 562
630 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, $m if ($#{$m} > 2);
631 dpavlin 562 }
632    
633 dpavlin 574 =head2 marc_duplicate
634 dpavlin 562
635 dpavlin 574 Generate copy of current MARC record and continue working on copy
636    
637     marc_duplicate();
638    
639     Copies can be accessed using C<< _get_marc_fields( fetch_next => 1 ) >> or
640     C<< _get_marc_fields( offset => 42 ) >>.
641    
642     =cut
643    
644     sub marc_duplicate {
645     my $m = $marc_record->[ -1 ];
646     die "can't duplicate record which isn't defined" unless ($m);
647     push @{ $marc_record }, dclone( $m );
648 dpavlin 813 push @{ $marc_leader }, dclone( marc_leader() );
649     warn "## marc_duplicate = ", dump(@$marc_leader, @$marc_record), $/ if ($debug > 1);
650 dpavlin 574 $marc_record_offset = $#{ $marc_record };
651     warn "## marc_record_offset = $marc_record_offset", $/ if ($debug > 1);
652 dpavlin 813
653 dpavlin 574 }
654    
655     =head2 marc_remove
656    
657     Remove some field or subfield from MARC record.
658    
659     marc_remove('200');
660     marc_remove('200','a');
661    
662     This will erase field C<200> or C<200^a> from current MARC record.
663    
664 dpavlin 786 marc_remove('*');
665    
666     Will remove all fields in current MARC record.
667    
668 dpavlin 574 This is useful after calling C<marc_duplicate> or on it's own (but, you
669     should probably just remove that subfield definition if you are not
670     using C<marc_duplicate>).
671    
672     FIXME: support fields < 10.
673    
674     =cut
675    
676     sub marc_remove {
677     my ($f, $sf) = @_;
678    
679     die "marc_remove needs record number" unless defined($f);
680    
681     my $marc = $marc_record->[ $marc_record_offset ];
682    
683     warn "### marc_remove before = ", dump( $marc ), $/ if ($debug > 2);
684    
685 dpavlin 786 if ($f eq '*') {
686    
687     delete( $marc_record->[ $marc_record_offset ] );
688 dpavlin 788 warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
689 dpavlin 786
690     } else {
691    
692     my $i = 0;
693     foreach ( 0 .. $#{ $marc } ) {
694     last unless (defined $marc->[$i]);
695     warn "#### working on ",dump( @{ $marc->[$i] }), $/ if ($debug > 3);
696     if ($marc->[$i]->[0] eq $f) {
697     if (! defined $sf) {
698     # remove whole field
699     splice @$marc, $i, 1;
700     warn "#### slice \@\$marc, $i, 1 = ",dump( @{ $marc }), $/ if ($debug > 3);
701     $i--;
702     } else {
703     foreach my $j ( 0 .. (( $#{ $marc->[$i] } - 3 ) / 2) ) {
704     my $o = ($j * 2) + 3;
705     if ($marc->[$i]->[$o] eq $sf) {
706     # remove subfield
707     splice @{$marc->[$i]}, $o, 2;
708     warn "#### slice \@{\$marc->[$i]}, $o, 2 = ", dump( @{ $marc }), $/ if ($debug > 3);
709     # is record now empty?
710     if ($#{ $marc->[$i] } == 2) {
711     splice @$marc, $i, 1;
712     warn "#### slice \@\$marc, $i, 1 = ", dump( @{ $marc }), $/ if ($debug > 3);
713     $i--;
714     };
715     }
716 dpavlin 574 }
717     }
718     }
719 dpavlin 786 $i++;
720 dpavlin 574 }
721 dpavlin 786
722     warn "### marc_remove($f", $sf ? ",$sf" : "", ") after = ", dump( $marc ), $/ if ($debug > 2);
723    
724     $marc_record->[ $marc_record_offset ] = $marc;
725 dpavlin 574 }
726    
727     warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
728     }
729    
730 dpavlin 604 =head2 marc_original_order
731    
732     Copy all subfields preserving original order to marc field.
733    
734 dpavlin 616 marc_original_order( marc_field_number, original_input_field_number );
735 dpavlin 604
736 dpavlin 616 Please note that field numbers are consistent with other commands (marc
737     field number first), but somewhat counter-intuitive (destination and then
738     source).
739    
740 dpavlin 604 You might want to use this command if you are just renaming subfields or
741     using pre-processing modify_record in C<config.yml> and don't need any
742     post-processing or want to preserve order of original subfields.
743    
744 dpavlin 616
745 dpavlin 604 =cut
746    
747     sub marc_original_order {
748    
749 dpavlin 616 my ($to, $from) = @_;
750 dpavlin 604 die "marc_original_order needs from and to fields\n" unless ($from && $to);
751    
752 dpavlin 616 return unless defined($rec->{$from});
753    
754     my $r = $rec->{$from};
755 dpavlin 604 die "record field $from isn't array\n" unless (ref($r) eq 'ARRAY');
756    
757     my ($i1,$i2) = defined($marc_indicators->{$to}) ? @{ $marc_indicators->{$to} } : (' ',' ');
758 dpavlin 616 warn "## marc_original_order($to,$from) source = ", dump( $r ),$/ if ($debug > 1);
759 dpavlin 604
760     foreach my $d (@$r) {
761    
762 dpavlin 605 if (! defined($d->{subfields}) && ref($d->{subfields}) ne 'ARRAY') {
763 dpavlin 616 warn "# marc_original_order($to,$from): field $from doesn't have subfields specification\n";
764 dpavlin 605 next;
765     }
766    
767 dpavlin 604 my @sfs = @{ $d->{subfields} };
768    
769     die "field $from doesn't have even number of subfields specifications\n" unless($#sfs % 2 == 1);
770    
771 dpavlin 618 warn "#--> d: ",dump($d), "\n#--> sfs: ",dump(@sfs),$/ if ($debug > 2);
772 dpavlin 604
773     my $m = [ $to, $i1, $i2 ];
774    
775     while (my $sf = shift @sfs) {
776 dpavlin 618
777     warn "#--> sf: ",dump($sf), $/ if ($debug > 2);
778 dpavlin 604 my $offset = shift @sfs;
779     die "corrupted sufields specification for field $from\n" unless defined($offset);
780    
781     my $v;
782     if (ref($d->{$sf}) eq 'ARRAY') {
783     $v = $d->{$sf}->[$offset] if (defined($d->{$sf}->[$offset]));
784     } elsif ($offset == 0) {
785     $v = $d->{$sf};
786     } else {
787     die "field $from subfield '$sf' need occurence $offset which doesn't exist", dump($d->{$sf});
788     }
789     push @$m, ( $sf, $v ) if (defined($v));
790     }
791    
792     if ($#{$m} > 2) {
793     push @{ $marc_record->[ $marc_record_offset ] }, $m;
794     }
795     }
796    
797     warn "## marc_record = ", dump( $marc_record ),$/ if ($debug > 1);
798     }
799    
800 dpavlin 813 =head2 marc_count
801 dpavlin 604
802 dpavlin 813 Return number of MARC records created using L</marc_duplicate>.
803    
804     print "created ", marc_count(), " records";
805    
806     =cut
807    
808     sub marc_count {
809     return $#{ $marc_record };
810     }
811    
812    
813 dpavlin 540 =head1 Functions to extract data from input
814    
815     This function should be used inside functions to create C<data_structure> described
816     above.
817    
818 dpavlin 641 =head2 _pack_subfields_hash
819    
820 dpavlin 669 @subfields = _pack_subfields_hash( $h );
821     $subfields = _pack_subfields_hash( $h, 1 );
822 dpavlin 641
823 dpavlin 669 Return each subfield value in array or pack them all together and return scalar
824     with subfields (denoted by C<^>) and values.
825    
826 dpavlin 641 =cut
827    
828     sub _pack_subfields_hash {
829    
830 dpavlin 642 warn "## _pack_subfields_hash( ",dump(@_), " )\n" if ($debug > 1);
831 dpavlin 641
832     my ($h,$include_subfields) = @_;
833    
834     if ( defined($h->{subfields}) ) {
835     my $sfs = delete $h->{subfields} || die "no subfields?";
836     my @out;
837     while (@$sfs) {
838     my $sf = shift @$sfs;
839     push @out, '^' . $sf if ($include_subfields);
840     my $o = shift @$sfs;
841     if ($o == 0 && ref( $h->{$sf} ) ne 'ARRAY' ) {
842     # single element subfields are not arrays
843 dpavlin 669 #warn "====> $sf $o / $#$sfs ", dump( $sfs, $h->{$sf} ), "\n";
844 dpavlin 667
845 dpavlin 641 push @out, $h->{$sf};
846     } else {
847 dpavlin 669 #warn "====> $sf $o / $#$sfs ", dump( $sfs, $h->{$sf} ), "\n";
848 dpavlin 641 push @out, $h->{$sf}->[$o];
849     }
850     }
851 dpavlin 667 if ($include_subfields) {
852     return join('', @out);
853     } else {
854     return @out;
855     }
856 dpavlin 641 } else {
857 dpavlin 667 if ($include_subfields) {
858     my $out = '';
859 dpavlin 668 foreach my $sf (sort keys %$h) {
860 dpavlin 667 if (ref($h->{$sf}) eq 'ARRAY') {
861     $out .= '^' . $sf . join('^' . $sf, @{ $h->{$sf} });
862     } else {
863     $out .= '^' . $sf . $h->{$sf};
864     }
865     }
866     return $out;
867     } else {
868     # FIXME this should probably be in alphabetical order instead of hash order
869     values %{$h};
870     }
871 dpavlin 641 }
872     }
873    
874 dpavlin 536 =head2 rec1
875 dpavlin 371
876 dpavlin 536 Return all values in some field
877 dpavlin 371
878 dpavlin 536 @v = rec1('200')
879 dpavlin 15
880 dpavlin 536 TODO: order of values is probably same as in source data, need to investigate that
881 dpavlin 15
882 dpavlin 536 =cut
883 dpavlin 15
884 dpavlin 536 sub rec1 {
885     my $f = shift;
886 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
887 dpavlin 536 return unless (defined($rec) && defined($rec->{$f}));
888 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
889 dpavlin 536 if (ref($rec->{$f}) eq 'ARRAY') {
890 dpavlin 641 my @out;
891     foreach my $h ( @{ $rec->{$f} } ) {
892     if (ref($h) eq 'HASH') {
893     push @out, ( _pack_subfields_hash( $h ) );
894 dpavlin 31 } else {
895 dpavlin 641 push @out, $h;
896 dpavlin 31 }
897 dpavlin 641 }
898     return @out;
899 dpavlin 536 } elsif( defined($rec->{$f}) ) {
900     return $rec->{$f};
901 dpavlin 15 }
902     }
903    
904 dpavlin 536 =head2 rec2
905 dpavlin 15
906 dpavlin 536 Return all values in specific field and subfield
907 dpavlin 13
908 dpavlin 536 @v = rec2('200','a')
909 dpavlin 13
910     =cut
911    
912 dpavlin 536 sub rec2 {
913     my $f = shift;
914     return unless (defined($rec && $rec->{$f}));
915     my $sf = shift;
916 dpavlin 601 warn "rec2($f,$sf) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
917 dpavlin 589 return map {
918     if (ref($_->{$sf}) eq 'ARRAY') {
919     @{ $_->{$sf} };
920     } else {
921     $_->{$sf};
922     }
923     } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} };
924 dpavlin 536 }
925 dpavlin 13
926 dpavlin 536 =head2 rec
927 dpavlin 13
928 dpavlin 536 syntaxtic sugar for
929 dpavlin 13
930 dpavlin 536 @v = rec('200')
931     @v = rec('200','a')
932 dpavlin 13
933 dpavlin 750 If rec() returns just single value, it will
934     return scalar, not array.
935    
936 dpavlin 536 =cut
937 dpavlin 373
938 dpavlin 536 sub rec {
939 dpavlin 583 my @out;
940 dpavlin 536 if ($#_ == 0) {
941 dpavlin 583 @out = rec1(@_);
942 dpavlin 536 } elsif ($#_ == 1) {
943 dpavlin 583 @out = rec2(@_);
944 dpavlin 13 }
945 dpavlin 750 if ($#out == 0 && ! wantarray) {
946     return $out[0];
947     } elsif (@out) {
948 dpavlin 583 return @out;
949     } else {
950     return '';
951     }
952 dpavlin 13 }
953    
954 dpavlin 536 =head2 regex
955 dpavlin 15
956 dpavlin 536 Apply regex to some or all values
957 dpavlin 15
958 dpavlin 536 @v = regex( 's/foo/bar/g', @v );
959 dpavlin 15
960     =cut
961    
962 dpavlin 536 sub regex {
963     my $r = shift;
964     my @out;
965 dpavlin 550 #warn "r: $r\n", dump(\@_);
966 dpavlin 536 foreach my $t (@_) {
967     next unless ($t);
968     eval "\$t =~ $r";
969     push @out, $t if ($t && $t ne '');
970 dpavlin 368 }
971 dpavlin 536 return @out;
972 dpavlin 15 }
973    
974 dpavlin 536 =head2 prefix
975 dpavlin 15
976 dpavlin 536 Prefix all values with a string
977 dpavlin 15
978 dpavlin 536 @v = prefix( 'my_', @v );
979 dpavlin 15
980     =cut
981    
982 dpavlin 536 sub prefix {
983 dpavlin 592 my $p = shift or return;
984 dpavlin 536 return map { $p . $_ } grep { defined($_) } @_;
985     }
986 dpavlin 15
987 dpavlin 536 =head2 suffix
988 dpavlin 15
989 dpavlin 536 suffix all values with a string
990 dpavlin 15
991 dpavlin 536 @v = suffix( '_my', @v );
992 dpavlin 15
993 dpavlin 536 =cut
994 dpavlin 15
995 dpavlin 536 sub suffix {
996     my $s = shift or die "suffix needs string as first argument";
997     return map { $_ . $s } grep { defined($_) } @_;
998 dpavlin 15 }
999    
1000 dpavlin 536 =head2 surround
1001 dpavlin 13
1002 dpavlin 536 surround all values with a two strings
1003 dpavlin 13
1004 dpavlin 536 @v = surround( 'prefix_', '_suffix', @v );
1005 dpavlin 13
1006     =cut
1007    
1008 dpavlin 536 sub surround {
1009     my $p = shift or die "surround need prefix as first argument";
1010     my $s = shift or die "surround needs suffix as second argument";
1011     return map { $p . $_ . $s } grep { defined($_) } @_;
1012 dpavlin 13 }
1013    
1014 dpavlin 536 =head2 first
1015 dpavlin 13
1016 dpavlin 536 Return first element
1017 dpavlin 15
1018 dpavlin 536 $v = first( @v );
1019 dpavlin 13
1020     =cut
1021    
1022 dpavlin 536 sub first {
1023     my $r = shift;
1024     return $r;
1025 dpavlin 13 }
1026    
1027 dpavlin 536 =head2 lookup
1028 dpavlin 13
1029 dpavlin 536 Consult lookup hashes for some value
1030 dpavlin 13
1031 dpavlin 725 @v = lookup(
1032     sub {
1033     'ffkk/peri/mfn'.rec('000')
1034     },
1035     'ffkk','peri','200-a-200-e',
1036     sub {
1037     first(rec(200,'a')).' '.first(rec('200','e'))
1038     }
1039     );
1040 dpavlin 13
1041 dpavlin 725 Code like above will be B<automatically generated> using L<WebPAC::Parse> from
1042     normal lookup definition in C<conf/lookup/something.pl> which looks like:
1043 dpavlin 707
1044 dpavlin 725 lookup(
1045     # which results to return from record recorded in lookup
1046     sub { 'ffkk/peri/mfn' . rec('000') },
1047     # from which database and input
1048     'ffkk','peri',
1049     # such that following values match
1050     sub { first(rec(200,'a')) . ' ' . first(rec('200','e')) },
1051     # if this part is missing, we will try to match same fields
1052     # from lookup record and current one, or you can override
1053     # which records to use from current record using
1054     sub { rec('900','x') . ' ' . rec('900','y') },
1055     )
1056    
1057     You can think about this lookup as SQL (if that helps):
1058    
1059     select
1060     sub { what }
1061     from
1062     database, input
1063     where
1064     sub { filter from lookuped record }
1065     having
1066     sub { optional filter on current record }
1067    
1068     Easy as pie, right?
1069    
1070 dpavlin 13 =cut
1071    
1072 dpavlin 536 sub lookup {
1073 dpavlin 725 my ($what, $database, $input, $key, $having) = @_;
1074    
1075 dpavlin 766 confess "lookup needs 5 arguments: what, database, input, key, having\n" unless ($#_ == 4);
1076 dpavlin 725
1077 dpavlin 729 warn "## lookup ($database, $input, $key)", $/ if ($debug > 1);
1078 dpavlin 725 return unless (defined($lookup->{$database}->{$input}->{$key}));
1079    
1080 dpavlin 736 confess "lookup really need load_row_coderef added to data_structure\n" unless ($load_row_coderef);
1081 dpavlin 725
1082     my $mfns;
1083     my @having = $having->();
1084    
1085 dpavlin 729 warn "## having = ", dump( @having ) if ($debug > 2);
1086 dpavlin 725
1087     foreach my $h ( @having ) {
1088     if (defined($lookup->{$database}->{$input}->{$key}->{$h})) {
1089 dpavlin 752 warn "lookup for $database/$input/$key/$h return ",dump($lookup->{$database}->{$input}->{$key}->{$h}),"\n" if ($debug);
1090 dpavlin 725 $mfns->{$_}++ foreach keys %{ $lookup->{$database}->{$input}->{$key}->{$h} };
1091     }
1092 dpavlin 536 }
1093 dpavlin 725
1094     return unless ($mfns);
1095    
1096     my @mfns = sort keys %$mfns;
1097    
1098 dpavlin 750 warn "# lookup loading $database/$input/$key mfn ", join(",",@mfns)," having ",dump(@having),"\n" if ($debug);
1099 dpavlin 725
1100     my $old_rec = $rec;
1101     my @out;
1102    
1103     foreach my $mfn (@mfns) {
1104 dpavlin 736 $rec = $load_row_coderef->( $database, $input, $mfn );
1105 dpavlin 725
1106 dpavlin 752 warn "got $database/$input/$mfn = ", dump($rec), $/ if ($debug);
1107 dpavlin 725
1108     my @vals = $what->();
1109    
1110     push @out, ( @vals );
1111    
1112 dpavlin 752 warn "lookup for mfn $mfn returned ", dump(@vals), $/ if ($debug);
1113 dpavlin 725 }
1114    
1115     # if (ref($lookup->{$k}) eq 'ARRAY') {
1116     # return @{ $lookup->{$k} };
1117     # } else {
1118     # return $lookup->{$k};
1119     # }
1120    
1121     $rec = $old_rec;
1122    
1123 dpavlin 750 warn "## lookup returns = ", dump(@out), $/ if ($debug);
1124 dpavlin 725
1125 dpavlin 740 if ($#out == 0) {
1126     return $out[0];
1127     } else {
1128     return @out;
1129     }
1130 dpavlin 13 }
1131    
1132 dpavlin 707 =head2 save_into_lookup
1133    
1134 dpavlin 725 Save value into lookup. It associates current database, input
1135     and specific keys with one or more values which will be
1136     associated over MFN.
1137 dpavlin 707
1138 dpavlin 725 MFN will be extracted from first occurence current of field 000
1139     in current record, or if it doesn't exist from L<_set_config> C<_mfn>.
1140    
1141     my $nr = save_into_lookup($database,$input,$key,sub {
1142 dpavlin 707 # code which produce one or more values
1143     });
1144    
1145 dpavlin 725 It returns number of items saved.
1146 dpavlin 707
1147 dpavlin 725 This function shouldn't be called directly, it's called from code created by
1148     L<WebPAC::Parser>.
1149    
1150 dpavlin 707 =cut
1151    
1152     sub save_into_lookup {
1153 dpavlin 712 my ($database,$input,$key,$coderef) = @_;
1154     die "save_into_lookup needs database" unless defined($database);
1155     die "save_into_lookup needs input" unless defined($input);
1156     die "save_into_lookup needs key" unless defined($key);
1157 dpavlin 707 die "save_into_lookup needs CODE" unless ( defined($coderef) && ref($coderef) eq 'CODE' );
1158 dpavlin 725
1159 dpavlin 729 warn "## save_into_lookup rec = ", dump($rec), " config = ", dump($config), $/ if ($debug > 2);
1160 dpavlin 725
1161     my $mfn =
1162     defined($rec->{'000'}->[0]) ? $rec->{'000'}->[0] :
1163     defined($config->{_mfn}) ? $config->{_mfn} :
1164     die "mfn not defined or zero";
1165    
1166     my $nr = 0;
1167    
1168 dpavlin 707 foreach my $v ( $coderef->() ) {
1169 dpavlin 712 $lookup->{$database}->{$input}->{$key}->{$v}->{$mfn}++;
1170 dpavlin 721 warn "# saved lookup $database/$input/$key [$v] $mfn\n" if ($debug > 1);
1171 dpavlin 725 $nr++;
1172 dpavlin 707 }
1173 dpavlin 725
1174     return $nr;
1175 dpavlin 707 }
1176    
1177 dpavlin 595 =head2 config
1178    
1179     Consult config values stored in C<config.yml>
1180    
1181     # return database code (key under databases in yaml)
1182     $database_code = config(); # use _ from hash
1183     $database_name = config('name');
1184     $database_input_name = config('input name');
1185     $tag = config('input normalize tag');
1186    
1187     Up to three levels are supported.
1188    
1189     =cut
1190    
1191     sub config {
1192     return unless ($config);
1193    
1194     my $p = shift;
1195    
1196     $p ||= '';
1197    
1198     my $v;
1199    
1200     warn "### getting config($p)\n" if ($debug > 1);
1201    
1202     my @p = split(/\s+/,$p);
1203     if ($#p < 0) {
1204     $v = $config->{ '_' }; # special, database code
1205     } else {
1206    
1207     my $c = dclone( $config );
1208    
1209     foreach my $k (@p) {
1210     warn "### k: $k c = ",dump($c),$/ if ($debug > 1);
1211     if (ref($c) eq 'ARRAY') {
1212     $c = shift @$c;
1213     warn "config($p) taking first occurence of '$k', probably not what you wanted!\n";
1214     last;
1215     }
1216    
1217     if (! defined($c->{$k}) ) {
1218     $c = undef;
1219     last;
1220     } else {
1221     $c = $c->{$k};
1222     }
1223     }
1224     $v = $c if ($c);
1225    
1226     }
1227    
1228     warn "## config( '$p' ) = ",dump( $v ),$/ if ($v && $debug);
1229     warn "config( '$p' ) is empty\n" if (! $v);
1230    
1231     return $v;
1232     }
1233    
1234     =head2 id
1235    
1236     Returns unique id of this record
1237    
1238     $id = id();
1239    
1240     Returns C<42/2> for 2nd occurence of MFN 42.
1241    
1242     =cut
1243    
1244     sub id {
1245     my $mfn = $config->{_mfn} || die "no _mfn in config data";
1246     return $mfn . $#{$marc_record} ? $#{$marc_record} + 1 : '';
1247     }
1248    
1249 dpavlin 536 =head2 join_with
1250 dpavlin 13
1251 dpavlin 536 Joins walues with some delimiter
1252 dpavlin 10
1253 dpavlin 536 $v = join_with(", ", @v);
1254 dpavlin 10
1255 dpavlin 536 =cut
1256 dpavlin 10
1257 dpavlin 536 sub join_with {
1258     my $d = shift;
1259 dpavlin 586 warn "### join_with('$d',",dump(@_),")\n" if ($debug > 2);
1260 dpavlin 583 my $v = join($d, grep { defined($_) && $_ ne '' } @_);
1261     return '' unless defined($v);
1262     return $v;
1263 dpavlin 536 }
1264 dpavlin 10
1265 dpavlin 562 =head2 split_rec_on
1266    
1267     Split record subfield on some regex and take one of parts out
1268    
1269     $a_before_semi_column =
1270     split_rec_on('200','a', /\s*;\s*/, $part);
1271    
1272     C<$part> is optional number of element. First element is
1273     B<1>, not 0!
1274    
1275     If there is no C<$part> parameter or C<$part> is 0, this function will
1276     return all values produced by splitting.
1277    
1278     =cut
1279    
1280     sub split_rec_on {
1281     die "split_rec_on need (fld,sf,regex[,part]" if ($#_ < 2);
1282    
1283     my ($fld, $sf, $regex, $part) = @_;
1284 dpavlin 568 warn "### regex ", ref($regex), $regex, $/ if ($debug > 2);
1285 dpavlin 562
1286     my @r = rec( $fld, $sf );
1287     my $v = shift @r;
1288 dpavlin 568 warn "### first rec($fld,$sf) = ",dump($v),$/ if ($debug > 2);
1289 dpavlin 562
1290 dpavlin 604 return '' if ( ! defined($v) || $v =~ /^\s*$/);
1291 dpavlin 566
1292 dpavlin 562 my @s = split( $regex, $v );
1293 dpavlin 568 warn "## split_rec_on($fld,$sf,$regex,$part) = ",dump(@s),$/ if ($debug > 1);
1294 dpavlin 566 if ($part && $part > 0) {
1295 dpavlin 562 return $s[ $part - 1 ];
1296     } else {
1297 dpavlin 571 return @s;
1298 dpavlin 562 }
1299     }
1300    
1301 dpavlin 785 my $hash;
1302    
1303     =head2 set
1304    
1305     set( key => 'value' );
1306    
1307     =cut
1308    
1309     sub set {
1310     my ($k,$v) = @_;
1311 dpavlin 810 warn "## set ( $k => ", dump($v), " )", $/ if ( $debug );
1312 dpavlin 785 $hash->{$k} = $v;
1313     };
1314    
1315     =head2 get
1316    
1317     get( 'key' );
1318    
1319     =cut
1320    
1321     sub get {
1322     my $k = shift || return;
1323     my $v = $hash->{$k};
1324 dpavlin 810 warn "## get $k = ", dump( $v ), $/ if ( $debug );
1325 dpavlin 785 return $v;
1326     }
1327    
1328 dpavlin 791 =head2 count
1329 dpavlin 785
1330 dpavlin 791 if ( count( @result ) == 1 ) {
1331     # do something if only 1 result is there
1332     }
1333    
1334     =cut
1335    
1336     sub count {
1337 dpavlin 810 warn "## count ",dump(@_),$/ if ( $debug );
1338 dpavlin 791 return @_ . '';
1339     }
1340    
1341 dpavlin 536 # END
1342     1;

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