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

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Revision 815 - (hide annotations)
Mon Apr 2 17:20:01 2007 UTC (15 years, 10 months ago) by dpavlin
File size: 30368 byte(s)
 r1192@llin:  dpavlin | 2007-04-02 19:20:01 +0200
 added support for fix-length fields using marc_fixed [2.29]

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 815 Version 0.28
46 dpavlin 10
47     =cut
48    
49 dpavlin 815 our $VERSION = '0.28';
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     my $update = 0;
539    
540     map {
541     if ($_->[0] eq $f) {
542     my $old = $_->[1];
543     if (length($old) < $pos) {
544     $_->[1] .= ' ' x ( $pos - length($old) ) . $val;
545     warn "## marc_fixed($f,$pos,'$val') append '$old' -> '$_->[1]'\n";
546     } else {
547     $_->[1] = substr($old, 0, $pos) . $val . substr($old, $pos + length($val));
548     warn "## marc_fixed($f,$pos,'$val') update '$old' -> '$_->[1]'\n";
549     }
550     $update++;
551     }
552     } @{ $marc_record->[ $marc_record_offset ] };
553    
554     if (! $update) {
555     my $v = ' ' x $pos . $val;
556     push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $v ];
557     warn "## marc_fixed($f,$pos,'val') created '$v'\n";
558     }
559     }
560    
561 dpavlin 547 =head2 marc
562 dpavlin 540
563     Save value for MARC field
564    
565 dpavlin 547 marc('900','a', rec('200','a') );
566 dpavlin 571 marc('001', rec('000') );
567 dpavlin 540
568     =cut
569    
570 dpavlin 547 sub marc {
571     my $f = shift or die "marc needs field";
572     die "marc field must be numer" unless ($f =~ /^\d+$/);
573 dpavlin 540
574 dpavlin 571 my $sf;
575     if ($f >= 10) {
576     $sf = shift or die "marc needs subfield";
577     }
578 dpavlin 540
579 dpavlin 541 foreach (@_) {
580     my $v = $_; # make var read-write for Encode
581 dpavlin 543 next unless (defined($v) && $v !~ /^\s*$/);
582 dpavlin 548 my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
583 dpavlin 571 if (defined $sf) {
584 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $i1, $i2, $sf => $v ];
585 dpavlin 571 } else {
586 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $v ];
587 dpavlin 571 }
588 dpavlin 540 }
589     }
590    
591 dpavlin 547 =head2 marc_repeatable_subfield
592    
593     Save values for MARC repetable subfield
594    
595     marc_repeatable_subfield('910', 'z', rec('909') );
596    
597     =cut
598    
599     sub marc_repeatable_subfield {
600 dpavlin 550 my ($f,$sf) = @_;
601     die "marc_repeatable_subfield need field and subfield!\n" unless ($f && $sf);
602     $marc_repeatable_subfield->{ $f . $sf }++;
603 dpavlin 547 marc(@_);
604     }
605    
606     =head2 marc_indicators
607    
608     Set both indicators for MARC field
609    
610     marc_indicators('900', ' ', 1);
611    
612     Any indicator value other than C<0-9> will be treated as undefined.
613    
614     =cut
615    
616     sub marc_indicators {
617     my $f = shift || die "marc_indicators need field!\n";
618     my ($i1,$i2) = @_;
619     die "marc_indicators($f, ...) need i1!\n" unless(defined($i1));
620     die "marc_indicators($f, $i1, ...) need i2!\n" unless(defined($i2));
621    
622     $i1 = ' ' if ($i1 !~ /^\d$/);
623     $i2 = ' ' if ($i2 !~ /^\d$/);
624 dpavlin 548 @{ $marc_indicators->{$f} } = ($i1,$i2);
625 dpavlin 547 }
626    
627 dpavlin 562 =head2 marc_compose
628 dpavlin 547
629 dpavlin 562 Save values for each MARC subfield explicitly
630    
631     marc_compose('900',
632     'a', rec('200','a')
633     'b', rec('201','a')
634     'a', rec('200','b')
635     'c', rec('200','c')
636     );
637    
638 dpavlin 603 If you specify C<+> for subfield, value will be appended
639     to previous defined subfield.
640    
641 dpavlin 562 =cut
642    
643     sub marc_compose {
644     my $f = shift or die "marc_compose needs field";
645     die "marc_compose field must be numer" unless ($f =~ /^\d+$/);
646    
647     my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
648     my $m = [ $f, $i1, $i2 ];
649    
650 dpavlin 583 warn "### marc_compose input subfields = ", dump(@_),$/ if ($debug > 2);
651    
652 dpavlin 619 if ($#_ % 2 != 1) {
653     die "ERROR: marc_compose",dump($f,@_)," not valid (must be even).\nDo you need to add first() or join() around some argument?\n";
654     }
655    
656 dpavlin 562 while (@_) {
657 dpavlin 619 my $sf = shift;
658 dpavlin 565 my $v = shift;
659 dpavlin 562
660     next unless (defined($v) && $v !~ /^\s*$/);
661 dpavlin 568 warn "## ++ marc_compose($f,$sf,$v) ", dump( $m ),$/ if ($debug > 1);
662 dpavlin 603 if ($sf ne '+') {
663     push @$m, ( $sf, $v );
664     } else {
665     $m->[ $#$m ] .= $v;
666     }
667 dpavlin 562 }
668    
669 dpavlin 586 warn "## marc_compose current marc = ", dump( $m ),$/ if ($debug > 1);
670 dpavlin 562
671 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, $m if ($#{$m} > 2);
672 dpavlin 562 }
673    
674 dpavlin 574 =head2 marc_duplicate
675 dpavlin 562
676 dpavlin 574 Generate copy of current MARC record and continue working on copy
677    
678     marc_duplicate();
679    
680     Copies can be accessed using C<< _get_marc_fields( fetch_next => 1 ) >> or
681     C<< _get_marc_fields( offset => 42 ) >>.
682    
683     =cut
684    
685     sub marc_duplicate {
686     my $m = $marc_record->[ -1 ];
687     die "can't duplicate record which isn't defined" unless ($m);
688     push @{ $marc_record }, dclone( $m );
689 dpavlin 813 push @{ $marc_leader }, dclone( marc_leader() );
690     warn "## marc_duplicate = ", dump(@$marc_leader, @$marc_record), $/ if ($debug > 1);
691 dpavlin 574 $marc_record_offset = $#{ $marc_record };
692     warn "## marc_record_offset = $marc_record_offset", $/ if ($debug > 1);
693 dpavlin 813
694 dpavlin 574 }
695    
696     =head2 marc_remove
697    
698     Remove some field or subfield from MARC record.
699    
700     marc_remove('200');
701     marc_remove('200','a');
702    
703     This will erase field C<200> or C<200^a> from current MARC record.
704    
705 dpavlin 786 marc_remove('*');
706    
707     Will remove all fields in current MARC record.
708    
709 dpavlin 574 This is useful after calling C<marc_duplicate> or on it's own (but, you
710     should probably just remove that subfield definition if you are not
711     using C<marc_duplicate>).
712    
713     FIXME: support fields < 10.
714    
715     =cut
716    
717     sub marc_remove {
718     my ($f, $sf) = @_;
719    
720     die "marc_remove needs record number" unless defined($f);
721    
722     my $marc = $marc_record->[ $marc_record_offset ];
723    
724     warn "### marc_remove before = ", dump( $marc ), $/ if ($debug > 2);
725    
726 dpavlin 786 if ($f eq '*') {
727    
728     delete( $marc_record->[ $marc_record_offset ] );
729 dpavlin 788 warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
730 dpavlin 786
731     } else {
732    
733     my $i = 0;
734     foreach ( 0 .. $#{ $marc } ) {
735     last unless (defined $marc->[$i]);
736     warn "#### working on ",dump( @{ $marc->[$i] }), $/ if ($debug > 3);
737     if ($marc->[$i]->[0] eq $f) {
738     if (! defined $sf) {
739     # remove whole field
740     splice @$marc, $i, 1;
741     warn "#### slice \@\$marc, $i, 1 = ",dump( @{ $marc }), $/ if ($debug > 3);
742     $i--;
743     } else {
744     foreach my $j ( 0 .. (( $#{ $marc->[$i] } - 3 ) / 2) ) {
745     my $o = ($j * 2) + 3;
746     if ($marc->[$i]->[$o] eq $sf) {
747     # remove subfield
748     splice @{$marc->[$i]}, $o, 2;
749     warn "#### slice \@{\$marc->[$i]}, $o, 2 = ", dump( @{ $marc }), $/ if ($debug > 3);
750     # is record now empty?
751     if ($#{ $marc->[$i] } == 2) {
752     splice @$marc, $i, 1;
753     warn "#### slice \@\$marc, $i, 1 = ", dump( @{ $marc }), $/ if ($debug > 3);
754     $i--;
755     };
756     }
757 dpavlin 574 }
758     }
759     }
760 dpavlin 786 $i++;
761 dpavlin 574 }
762 dpavlin 786
763     warn "### marc_remove($f", $sf ? ",$sf" : "", ") after = ", dump( $marc ), $/ if ($debug > 2);
764    
765     $marc_record->[ $marc_record_offset ] = $marc;
766 dpavlin 574 }
767    
768     warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
769     }
770    
771 dpavlin 604 =head2 marc_original_order
772    
773     Copy all subfields preserving original order to marc field.
774    
775 dpavlin 616 marc_original_order( marc_field_number, original_input_field_number );
776 dpavlin 604
777 dpavlin 616 Please note that field numbers are consistent with other commands (marc
778     field number first), but somewhat counter-intuitive (destination and then
779     source).
780    
781 dpavlin 604 You might want to use this command if you are just renaming subfields or
782     using pre-processing modify_record in C<config.yml> and don't need any
783     post-processing or want to preserve order of original subfields.
784    
785 dpavlin 616
786 dpavlin 604 =cut
787    
788     sub marc_original_order {
789    
790 dpavlin 616 my ($to, $from) = @_;
791 dpavlin 604 die "marc_original_order needs from and to fields\n" unless ($from && $to);
792    
793 dpavlin 616 return unless defined($rec->{$from});
794    
795     my $r = $rec->{$from};
796 dpavlin 604 die "record field $from isn't array\n" unless (ref($r) eq 'ARRAY');
797    
798     my ($i1,$i2) = defined($marc_indicators->{$to}) ? @{ $marc_indicators->{$to} } : (' ',' ');
799 dpavlin 616 warn "## marc_original_order($to,$from) source = ", dump( $r ),$/ if ($debug > 1);
800 dpavlin 604
801     foreach my $d (@$r) {
802    
803 dpavlin 605 if (! defined($d->{subfields}) && ref($d->{subfields}) ne 'ARRAY') {
804 dpavlin 616 warn "# marc_original_order($to,$from): field $from doesn't have subfields specification\n";
805 dpavlin 605 next;
806     }
807    
808 dpavlin 604 my @sfs = @{ $d->{subfields} };
809    
810     die "field $from doesn't have even number of subfields specifications\n" unless($#sfs % 2 == 1);
811    
812 dpavlin 618 warn "#--> d: ",dump($d), "\n#--> sfs: ",dump(@sfs),$/ if ($debug > 2);
813 dpavlin 604
814     my $m = [ $to, $i1, $i2 ];
815    
816     while (my $sf = shift @sfs) {
817 dpavlin 618
818     warn "#--> sf: ",dump($sf), $/ if ($debug > 2);
819 dpavlin 604 my $offset = shift @sfs;
820     die "corrupted sufields specification for field $from\n" unless defined($offset);
821    
822     my $v;
823     if (ref($d->{$sf}) eq 'ARRAY') {
824     $v = $d->{$sf}->[$offset] if (defined($d->{$sf}->[$offset]));
825     } elsif ($offset == 0) {
826     $v = $d->{$sf};
827     } else {
828     die "field $from subfield '$sf' need occurence $offset which doesn't exist", dump($d->{$sf});
829     }
830     push @$m, ( $sf, $v ) if (defined($v));
831     }
832    
833     if ($#{$m} > 2) {
834     push @{ $marc_record->[ $marc_record_offset ] }, $m;
835     }
836     }
837    
838     warn "## marc_record = ", dump( $marc_record ),$/ if ($debug > 1);
839     }
840    
841 dpavlin 813 =head2 marc_count
842 dpavlin 604
843 dpavlin 813 Return number of MARC records created using L</marc_duplicate>.
844    
845     print "created ", marc_count(), " records";
846    
847     =cut
848    
849     sub marc_count {
850     return $#{ $marc_record };
851     }
852    
853    
854 dpavlin 540 =head1 Functions to extract data from input
855    
856     This function should be used inside functions to create C<data_structure> described
857     above.
858    
859 dpavlin 641 =head2 _pack_subfields_hash
860    
861 dpavlin 669 @subfields = _pack_subfields_hash( $h );
862     $subfields = _pack_subfields_hash( $h, 1 );
863 dpavlin 641
864 dpavlin 669 Return each subfield value in array or pack them all together and return scalar
865     with subfields (denoted by C<^>) and values.
866    
867 dpavlin 641 =cut
868    
869     sub _pack_subfields_hash {
870    
871 dpavlin 642 warn "## _pack_subfields_hash( ",dump(@_), " )\n" if ($debug > 1);
872 dpavlin 641
873     my ($h,$include_subfields) = @_;
874    
875     if ( defined($h->{subfields}) ) {
876     my $sfs = delete $h->{subfields} || die "no subfields?";
877     my @out;
878     while (@$sfs) {
879     my $sf = shift @$sfs;
880     push @out, '^' . $sf if ($include_subfields);
881     my $o = shift @$sfs;
882     if ($o == 0 && ref( $h->{$sf} ) ne 'ARRAY' ) {
883     # single element subfields are not arrays
884 dpavlin 669 #warn "====> $sf $o / $#$sfs ", dump( $sfs, $h->{$sf} ), "\n";
885 dpavlin 667
886 dpavlin 641 push @out, $h->{$sf};
887     } else {
888 dpavlin 669 #warn "====> $sf $o / $#$sfs ", dump( $sfs, $h->{$sf} ), "\n";
889 dpavlin 641 push @out, $h->{$sf}->[$o];
890     }
891     }
892 dpavlin 667 if ($include_subfields) {
893     return join('', @out);
894     } else {
895     return @out;
896     }
897 dpavlin 641 } else {
898 dpavlin 667 if ($include_subfields) {
899     my $out = '';
900 dpavlin 668 foreach my $sf (sort keys %$h) {
901 dpavlin 667 if (ref($h->{$sf}) eq 'ARRAY') {
902     $out .= '^' . $sf . join('^' . $sf, @{ $h->{$sf} });
903     } else {
904     $out .= '^' . $sf . $h->{$sf};
905     }
906     }
907     return $out;
908     } else {
909     # FIXME this should probably be in alphabetical order instead of hash order
910     values %{$h};
911     }
912 dpavlin 641 }
913     }
914    
915 dpavlin 536 =head2 rec1
916 dpavlin 371
917 dpavlin 536 Return all values in some field
918 dpavlin 371
919 dpavlin 536 @v = rec1('200')
920 dpavlin 15
921 dpavlin 536 TODO: order of values is probably same as in source data, need to investigate that
922 dpavlin 15
923 dpavlin 536 =cut
924 dpavlin 15
925 dpavlin 536 sub rec1 {
926     my $f = shift;
927 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
928 dpavlin 536 return unless (defined($rec) && defined($rec->{$f}));
929 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
930 dpavlin 536 if (ref($rec->{$f}) eq 'ARRAY') {
931 dpavlin 641 my @out;
932     foreach my $h ( @{ $rec->{$f} } ) {
933     if (ref($h) eq 'HASH') {
934     push @out, ( _pack_subfields_hash( $h ) );
935 dpavlin 31 } else {
936 dpavlin 641 push @out, $h;
937 dpavlin 31 }
938 dpavlin 641 }
939     return @out;
940 dpavlin 536 } elsif( defined($rec->{$f}) ) {
941     return $rec->{$f};
942 dpavlin 15 }
943     }
944    
945 dpavlin 536 =head2 rec2
946 dpavlin 15
947 dpavlin 536 Return all values in specific field and subfield
948 dpavlin 13
949 dpavlin 536 @v = rec2('200','a')
950 dpavlin 13
951     =cut
952    
953 dpavlin 536 sub rec2 {
954     my $f = shift;
955     return unless (defined($rec && $rec->{$f}));
956     my $sf = shift;
957 dpavlin 601 warn "rec2($f,$sf) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
958 dpavlin 589 return map {
959     if (ref($_->{$sf}) eq 'ARRAY') {
960     @{ $_->{$sf} };
961     } else {
962     $_->{$sf};
963     }
964     } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} };
965 dpavlin 536 }
966 dpavlin 13
967 dpavlin 536 =head2 rec
968 dpavlin 13
969 dpavlin 536 syntaxtic sugar for
970 dpavlin 13
971 dpavlin 536 @v = rec('200')
972     @v = rec('200','a')
973 dpavlin 13
974 dpavlin 750 If rec() returns just single value, it will
975     return scalar, not array.
976    
977 dpavlin 536 =cut
978 dpavlin 373
979 dpavlin 536 sub rec {
980 dpavlin 583 my @out;
981 dpavlin 536 if ($#_ == 0) {
982 dpavlin 583 @out = rec1(@_);
983 dpavlin 536 } elsif ($#_ == 1) {
984 dpavlin 583 @out = rec2(@_);
985 dpavlin 13 }
986 dpavlin 750 if ($#out == 0 && ! wantarray) {
987     return $out[0];
988     } elsif (@out) {
989 dpavlin 583 return @out;
990     } else {
991     return '';
992     }
993 dpavlin 13 }
994    
995 dpavlin 536 =head2 regex
996 dpavlin 15
997 dpavlin 536 Apply regex to some or all values
998 dpavlin 15
999 dpavlin 536 @v = regex( 's/foo/bar/g', @v );
1000 dpavlin 15
1001     =cut
1002    
1003 dpavlin 536 sub regex {
1004     my $r = shift;
1005     my @out;
1006 dpavlin 550 #warn "r: $r\n", dump(\@_);
1007 dpavlin 536 foreach my $t (@_) {
1008     next unless ($t);
1009     eval "\$t =~ $r";
1010     push @out, $t if ($t && $t ne '');
1011 dpavlin 368 }
1012 dpavlin 536 return @out;
1013 dpavlin 15 }
1014    
1015 dpavlin 536 =head2 prefix
1016 dpavlin 15
1017 dpavlin 536 Prefix all values with a string
1018 dpavlin 15
1019 dpavlin 536 @v = prefix( 'my_', @v );
1020 dpavlin 15
1021     =cut
1022    
1023 dpavlin 536 sub prefix {
1024 dpavlin 592 my $p = shift or return;
1025 dpavlin 536 return map { $p . $_ } grep { defined($_) } @_;
1026     }
1027 dpavlin 15
1028 dpavlin 536 =head2 suffix
1029 dpavlin 15
1030 dpavlin 536 suffix all values with a string
1031 dpavlin 15
1032 dpavlin 536 @v = suffix( '_my', @v );
1033 dpavlin 15
1034 dpavlin 536 =cut
1035 dpavlin 15
1036 dpavlin 536 sub suffix {
1037     my $s = shift or die "suffix needs string as first argument";
1038     return map { $_ . $s } grep { defined($_) } @_;
1039 dpavlin 15 }
1040    
1041 dpavlin 536 =head2 surround
1042 dpavlin 13
1043 dpavlin 536 surround all values with a two strings
1044 dpavlin 13
1045 dpavlin 536 @v = surround( 'prefix_', '_suffix', @v );
1046 dpavlin 13
1047     =cut
1048    
1049 dpavlin 536 sub surround {
1050     my $p = shift or die "surround need prefix as first argument";
1051     my $s = shift or die "surround needs suffix as second argument";
1052     return map { $p . $_ . $s } grep { defined($_) } @_;
1053 dpavlin 13 }
1054    
1055 dpavlin 536 =head2 first
1056 dpavlin 13
1057 dpavlin 536 Return first element
1058 dpavlin 15
1059 dpavlin 536 $v = first( @v );
1060 dpavlin 13
1061     =cut
1062    
1063 dpavlin 536 sub first {
1064     my $r = shift;
1065     return $r;
1066 dpavlin 13 }
1067    
1068 dpavlin 536 =head2 lookup
1069 dpavlin 13
1070 dpavlin 536 Consult lookup hashes for some value
1071 dpavlin 13
1072 dpavlin 725 @v = lookup(
1073     sub {
1074     'ffkk/peri/mfn'.rec('000')
1075     },
1076     'ffkk','peri','200-a-200-e',
1077     sub {
1078     first(rec(200,'a')).' '.first(rec('200','e'))
1079     }
1080     );
1081 dpavlin 13
1082 dpavlin 725 Code like above will be B<automatically generated> using L<WebPAC::Parse> from
1083     normal lookup definition in C<conf/lookup/something.pl> which looks like:
1084 dpavlin 707
1085 dpavlin 725 lookup(
1086     # which results to return from record recorded in lookup
1087     sub { 'ffkk/peri/mfn' . rec('000') },
1088     # from which database and input
1089     'ffkk','peri',
1090     # such that following values match
1091     sub { first(rec(200,'a')) . ' ' . first(rec('200','e')) },
1092     # if this part is missing, we will try to match same fields
1093     # from lookup record and current one, or you can override
1094     # which records to use from current record using
1095     sub { rec('900','x') . ' ' . rec('900','y') },
1096     )
1097    
1098     You can think about this lookup as SQL (if that helps):
1099    
1100     select
1101     sub { what }
1102     from
1103     database, input
1104     where
1105     sub { filter from lookuped record }
1106     having
1107     sub { optional filter on current record }
1108    
1109     Easy as pie, right?
1110    
1111 dpavlin 13 =cut
1112    
1113 dpavlin 536 sub lookup {
1114 dpavlin 725 my ($what, $database, $input, $key, $having) = @_;
1115    
1116 dpavlin 766 confess "lookup needs 5 arguments: what, database, input, key, having\n" unless ($#_ == 4);
1117 dpavlin 725
1118 dpavlin 729 warn "## lookup ($database, $input, $key)", $/ if ($debug > 1);
1119 dpavlin 725 return unless (defined($lookup->{$database}->{$input}->{$key}));
1120    
1121 dpavlin 736 confess "lookup really need load_row_coderef added to data_structure\n" unless ($load_row_coderef);
1122 dpavlin 725
1123     my $mfns;
1124     my @having = $having->();
1125    
1126 dpavlin 729 warn "## having = ", dump( @having ) if ($debug > 2);
1127 dpavlin 725
1128     foreach my $h ( @having ) {
1129     if (defined($lookup->{$database}->{$input}->{$key}->{$h})) {
1130 dpavlin 752 warn "lookup for $database/$input/$key/$h return ",dump($lookup->{$database}->{$input}->{$key}->{$h}),"\n" if ($debug);
1131 dpavlin 725 $mfns->{$_}++ foreach keys %{ $lookup->{$database}->{$input}->{$key}->{$h} };
1132     }
1133 dpavlin 536 }
1134 dpavlin 725
1135     return unless ($mfns);
1136    
1137     my @mfns = sort keys %$mfns;
1138    
1139 dpavlin 750 warn "# lookup loading $database/$input/$key mfn ", join(",",@mfns)," having ",dump(@having),"\n" if ($debug);
1140 dpavlin 725
1141     my $old_rec = $rec;
1142     my @out;
1143    
1144     foreach my $mfn (@mfns) {
1145 dpavlin 736 $rec = $load_row_coderef->( $database, $input, $mfn );
1146 dpavlin 725
1147 dpavlin 752 warn "got $database/$input/$mfn = ", dump($rec), $/ if ($debug);
1148 dpavlin 725
1149     my @vals = $what->();
1150    
1151     push @out, ( @vals );
1152    
1153 dpavlin 752 warn "lookup for mfn $mfn returned ", dump(@vals), $/ if ($debug);
1154 dpavlin 725 }
1155    
1156     # if (ref($lookup->{$k}) eq 'ARRAY') {
1157     # return @{ $lookup->{$k} };
1158     # } else {
1159     # return $lookup->{$k};
1160     # }
1161    
1162     $rec = $old_rec;
1163    
1164 dpavlin 750 warn "## lookup returns = ", dump(@out), $/ if ($debug);
1165 dpavlin 725
1166 dpavlin 740 if ($#out == 0) {
1167     return $out[0];
1168     } else {
1169     return @out;
1170     }
1171 dpavlin 13 }
1172    
1173 dpavlin 707 =head2 save_into_lookup
1174    
1175 dpavlin 725 Save value into lookup. It associates current database, input
1176     and specific keys with one or more values which will be
1177     associated over MFN.
1178 dpavlin 707
1179 dpavlin 725 MFN will be extracted from first occurence current of field 000
1180     in current record, or if it doesn't exist from L<_set_config> C<_mfn>.
1181    
1182     my $nr = save_into_lookup($database,$input,$key,sub {
1183 dpavlin 707 # code which produce one or more values
1184     });
1185    
1186 dpavlin 725 It returns number of items saved.
1187 dpavlin 707
1188 dpavlin 725 This function shouldn't be called directly, it's called from code created by
1189     L<WebPAC::Parser>.
1190    
1191 dpavlin 707 =cut
1192    
1193     sub save_into_lookup {
1194 dpavlin 712 my ($database,$input,$key,$coderef) = @_;
1195     die "save_into_lookup needs database" unless defined($database);
1196     die "save_into_lookup needs input" unless defined($input);
1197     die "save_into_lookup needs key" unless defined($key);
1198 dpavlin 707 die "save_into_lookup needs CODE" unless ( defined($coderef) && ref($coderef) eq 'CODE' );
1199 dpavlin 725
1200 dpavlin 729 warn "## save_into_lookup rec = ", dump($rec), " config = ", dump($config), $/ if ($debug > 2);
1201 dpavlin 725
1202     my $mfn =
1203     defined($rec->{'000'}->[0]) ? $rec->{'000'}->[0] :
1204     defined($config->{_mfn}) ? $config->{_mfn} :
1205     die "mfn not defined or zero";
1206    
1207     my $nr = 0;
1208    
1209 dpavlin 707 foreach my $v ( $coderef->() ) {
1210 dpavlin 712 $lookup->{$database}->{$input}->{$key}->{$v}->{$mfn}++;
1211 dpavlin 721 warn "# saved lookup $database/$input/$key [$v] $mfn\n" if ($debug > 1);
1212 dpavlin 725 $nr++;
1213 dpavlin 707 }
1214 dpavlin 725
1215     return $nr;
1216 dpavlin 707 }
1217    
1218 dpavlin 595 =head2 config
1219    
1220     Consult config values stored in C<config.yml>
1221    
1222     # return database code (key under databases in yaml)
1223     $database_code = config(); # use _ from hash
1224     $database_name = config('name');
1225     $database_input_name = config('input name');
1226     $tag = config('input normalize tag');
1227    
1228     Up to three levels are supported.
1229    
1230     =cut
1231    
1232     sub config {
1233     return unless ($config);
1234    
1235     my $p = shift;
1236    
1237     $p ||= '';
1238    
1239     my $v;
1240    
1241     warn "### getting config($p)\n" if ($debug > 1);
1242    
1243     my @p = split(/\s+/,$p);
1244     if ($#p < 0) {
1245     $v = $config->{ '_' }; # special, database code
1246     } else {
1247    
1248     my $c = dclone( $config );
1249    
1250     foreach my $k (@p) {
1251     warn "### k: $k c = ",dump($c),$/ if ($debug > 1);
1252     if (ref($c) eq 'ARRAY') {
1253     $c = shift @$c;
1254     warn "config($p) taking first occurence of '$k', probably not what you wanted!\n";
1255     last;
1256     }
1257    
1258     if (! defined($c->{$k}) ) {
1259     $c = undef;
1260     last;
1261     } else {
1262     $c = $c->{$k};
1263     }
1264     }
1265     $v = $c if ($c);
1266    
1267     }
1268    
1269     warn "## config( '$p' ) = ",dump( $v ),$/ if ($v && $debug);
1270     warn "config( '$p' ) is empty\n" if (! $v);
1271    
1272     return $v;
1273     }
1274    
1275     =head2 id
1276    
1277     Returns unique id of this record
1278    
1279     $id = id();
1280    
1281     Returns C<42/2> for 2nd occurence of MFN 42.
1282    
1283     =cut
1284    
1285     sub id {
1286     my $mfn = $config->{_mfn} || die "no _mfn in config data";
1287     return $mfn . $#{$marc_record} ? $#{$marc_record} + 1 : '';
1288     }
1289    
1290 dpavlin 536 =head2 join_with
1291 dpavlin 13
1292 dpavlin 536 Joins walues with some delimiter
1293 dpavlin 10
1294 dpavlin 536 $v = join_with(", ", @v);
1295 dpavlin 10
1296 dpavlin 536 =cut
1297 dpavlin 10
1298 dpavlin 536 sub join_with {
1299     my $d = shift;
1300 dpavlin 586 warn "### join_with('$d',",dump(@_),")\n" if ($debug > 2);
1301 dpavlin 583 my $v = join($d, grep { defined($_) && $_ ne '' } @_);
1302     return '' unless defined($v);
1303     return $v;
1304 dpavlin 536 }
1305 dpavlin 10
1306 dpavlin 562 =head2 split_rec_on
1307    
1308     Split record subfield on some regex and take one of parts out
1309    
1310     $a_before_semi_column =
1311     split_rec_on('200','a', /\s*;\s*/, $part);
1312    
1313     C<$part> is optional number of element. First element is
1314     B<1>, not 0!
1315    
1316     If there is no C<$part> parameter or C<$part> is 0, this function will
1317     return all values produced by splitting.
1318    
1319     =cut
1320    
1321     sub split_rec_on {
1322     die "split_rec_on need (fld,sf,regex[,part]" if ($#_ < 2);
1323    
1324     my ($fld, $sf, $regex, $part) = @_;
1325 dpavlin 568 warn "### regex ", ref($regex), $regex, $/ if ($debug > 2);
1326 dpavlin 562
1327     my @r = rec( $fld, $sf );
1328     my $v = shift @r;
1329 dpavlin 568 warn "### first rec($fld,$sf) = ",dump($v),$/ if ($debug > 2);
1330 dpavlin 562
1331 dpavlin 604 return '' if ( ! defined($v) || $v =~ /^\s*$/);
1332 dpavlin 566
1333 dpavlin 562 my @s = split( $regex, $v );
1334 dpavlin 568 warn "## split_rec_on($fld,$sf,$regex,$part) = ",dump(@s),$/ if ($debug > 1);
1335 dpavlin 566 if ($part && $part > 0) {
1336 dpavlin 562 return $s[ $part - 1 ];
1337     } else {
1338 dpavlin 571 return @s;
1339 dpavlin 562 }
1340     }
1341    
1342 dpavlin 785 my $hash;
1343    
1344     =head2 set
1345    
1346     set( key => 'value' );
1347    
1348     =cut
1349    
1350     sub set {
1351     my ($k,$v) = @_;
1352 dpavlin 810 warn "## set ( $k => ", dump($v), " )", $/ if ( $debug );
1353 dpavlin 785 $hash->{$k} = $v;
1354     };
1355    
1356     =head2 get
1357    
1358     get( 'key' );
1359    
1360     =cut
1361    
1362     sub get {
1363     my $k = shift || return;
1364     my $v = $hash->{$k};
1365 dpavlin 810 warn "## get $k = ", dump( $v ), $/ if ( $debug );
1366 dpavlin 785 return $v;
1367     }
1368    
1369 dpavlin 791 =head2 count
1370 dpavlin 785
1371 dpavlin 791 if ( count( @result ) == 1 ) {
1372     # do something if only 1 result is there
1373     }
1374    
1375     =cut
1376    
1377     sub count {
1378 dpavlin 810 warn "## count ",dump(@_),$/ if ( $debug );
1379 dpavlin 791 return @_ . '';
1380     }
1381    
1382 dpavlin 536 # END
1383     1;

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