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

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Revision 980 - (hide annotations)
Sat Nov 3 13:33:19 2007 UTC (15 years, 3 months ago) by dpavlin
File size: 30864 byte(s)
 r1499@llin:  dpavlin | 2007-11-03 14:31:44 +0100
 properly export isbn_10() and isbn_13()

1 dpavlin 10 package WebPAC::Normalize;
2 dpavlin 536 use Exporter 'import';
3 dpavlin 980 our @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 923 search_display search display sorted
11 dpavlin 912
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 dpavlin 979 frec
19 dpavlin 536 regex prefix suffix surround
20     first lookup join_with
21 dpavlin 707 save_into_lookup
22 dpavlin 562
23     split_rec_on
24 dpavlin 785
25     get set
26 dpavlin 791 count
27 dpavlin 980
28 dpavlin 536 /;
29 dpavlin 10
30     use warnings;
31     use strict;
32 dpavlin 536
33     #use base qw/WebPAC::Common/;
34 dpavlin 550 use Data::Dump qw/dump/;
35 dpavlin 574 use Storable qw/dclone/;
36 dpavlin 725 use Carp qw/confess/;
37 dpavlin 10
38 dpavlin 550 # debugging warn(s)
39     my $debug = 0;
40    
41 dpavlin 980 use WebPAC::Normalize::ISBN;
42     push @EXPORT, ( 'isbn_10', 'isbn_13' );
43 dpavlin 550
44 dpavlin 10 =head1 NAME
45    
46 dpavlin 536 WebPAC::Normalize - describe normalisaton rules using sets
47 dpavlin 10
48     =cut
49    
50 dpavlin 923 our $VERSION = '0.31';
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 => $config,
81 dpavlin 736 load_row_coderef => sub {
82 dpavlin 979 my ($database,$input,$mfn) = @_;
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, $marc_fetch_offset) = (0, 0);
173 dpavlin 538
174     sub _get_ds {
175 dpavlin 979
176     warn "## out = ",dump($out);
177    
178 dpavlin 538 return $out;
179     }
180    
181     =head2 _clean_ds
182    
183     Clean data structure hash for next record
184    
185     _clean_ds();
186    
187     =cut
188    
189     sub _clean_ds {
190 dpavlin 541 my $a = {@_};
191 dpavlin 812 ($out,$marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators, $marc_leader) = ();
192 dpavlin 574 ($marc_record_offset, $marc_fetch_offset) = (0,0);
193 dpavlin 541 $marc_encoding = $a->{marc_encoding};
194 dpavlin 538 }
195    
196     =head2 _set_lookup
197    
198     Set current lookup hash
199    
200     _set_lookup( $lookup );
201    
202     =cut
203    
204     my $lookup;
205    
206     sub _set_lookup {
207     $lookup = shift;
208     }
209    
210 dpavlin 707 =head2 _get_lookup
211    
212     Get current lookup hash
213    
214     my $lookup = _get_lookup();
215    
216     =cut
217    
218     sub _get_lookup {
219     return $lookup;
220     }
221    
222 dpavlin 736 =head2 _set_load_row
223 dpavlin 725
224     Setup code reference which will return L<data_structure> from
225     L<WebPAC::Store>
226    
227 dpavlin 736 _set_load_row(sub {
228 dpavlin 725 my ($database,$input,$mfn) = @_;
229 dpavlin 736 $store->load_row( database => $database, input => $input, id => $mfn );
230 dpavlin 725 });
231    
232     =cut
233    
234 dpavlin 736 sub _set_load_row {
235 dpavlin 725 my $coderef = shift;
236     confess "argument isn't CODE" unless ref($coderef) eq 'CODE';
237    
238 dpavlin 736 $load_row_coderef = $coderef;
239 dpavlin 725 }
240    
241 dpavlin 547 =head2 _get_marc_fields
242 dpavlin 540
243 dpavlin 547 Get all fields defined by calls to C<marc>
244 dpavlin 540
245 dpavlin 547 $marc->add_fields( WebPAC::Normalize:_get_marc_fields() );
246 dpavlin 540
247 dpavlin 543 We are using I<magic> which detect repeatable fields only from
248     sequence of field/subfield data generated by normalization.
249    
250 dpavlin 554 Repeatable field is created when there is second occurence of same subfield or
251     if any of indicators are different.
252 dpavlin 543
253 dpavlin 554 This is sane for most cases. Something like:
254 dpavlin 543
255 dpavlin 554 900a-1 900b-1 900c-1
256     900a-2 900b-2
257     900a-3
258    
259     will be created from any combination of:
260    
261     900a-1 900a-2 900a-3 900b-1 900b-2 900c-1
262    
263     and following rules:
264    
265     marc('900','a', rec('200','a') );
266     marc('900','b', rec('200','b') );
267     marc('900','c', rec('200','c') );
268    
269     which might not be what you have in mind. If you need repeatable subfield,
270     define it using C<marc_repeatable_subfield> like this:
271    
272 dpavlin 574 marc_repeatable_subfield('900','a');
273     marc('900','a', rec('200','a') );
274     marc('900','b', rec('200','b') );
275     marc('900','c', rec('200','c') );
276 dpavlin 554
277 dpavlin 574 will create:
278    
279     900a-1 900a-2 900a-3 900b-1 900c-1
280     900b-2
281    
282     There is also support for returning next or specific using:
283    
284     while (my $mf = WebPAC::Normalize:_get_marc_fields( fetch_next => 1 ) ) {
285     # do something with $mf
286     }
287    
288     will always return fields from next MARC record or
289    
290     my $mf = WebPAC::Normalize::_get_marc_fields( offset => 42 );
291    
292     will return 42th copy record (if it exists).
293    
294 dpavlin 540 =cut
295    
296 dpavlin 813 my $fetch_pos;
297    
298 dpavlin 547 sub _get_marc_fields {
299 dpavlin 550
300 dpavlin 574 my $arg = {@_};
301     warn "### _get_marc_fields arg: ", dump($arg), $/ if ($debug > 2);
302 dpavlin 813 $fetch_pos = $marc_fetch_offset;
303 dpavlin 574 if ($arg->{offset}) {
304 dpavlin 813 $fetch_pos = $arg->{offset};
305 dpavlin 574 } elsif($arg->{fetch_next}) {
306     $marc_fetch_offset++;
307     }
308 dpavlin 550
309 dpavlin 574 return if (! $marc_record || ref($marc_record) ne 'ARRAY');
310    
311     warn "### full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 2);
312    
313 dpavlin 813 my $marc_rec = $marc_record->[ $fetch_pos ];
314 dpavlin 574
315 dpavlin 813 warn "## _get_marc_fields (at offset: $fetch_pos) -- marc_record = ", dump( @$marc_rec ), $/ if ($debug > 1);
316 dpavlin 574
317     return if (! $marc_rec || ref($marc_rec) ne 'ARRAY' || $#{ $marc_rec } < 0);
318    
319 dpavlin 550 # first, sort all existing fields
320     # XXX might not be needed, but modern perl might randomize elements in hash
321     my @sorted_marc_record = sort {
322 dpavlin 572 $a->[0] . ( $a->[3] || '' ) cmp $b->[0] . ( $b->[3] || '')
323 dpavlin 574 } @{ $marc_rec };
324 dpavlin 550
325 dpavlin 574 @sorted_marc_record = @{ $marc_rec }; ### FIXME disable sorting
326 dpavlin 562
327 dpavlin 550 # output marc fields
328 dpavlin 542 my @m;
329 dpavlin 550
330     # count unique field-subfields (used for offset when walking to next subfield)
331     my $u;
332 dpavlin 572 map { $u->{ $_->[0] . ( $_->[3] || '') }++ } @sorted_marc_record;
333 dpavlin 550
334     if ($debug) {
335 dpavlin 574 warn "## marc_repeatable_subfield = ", dump( $marc_repeatable_subfield ), $/ if ( $marc_repeatable_subfield );
336 dpavlin 813 warn "## marc_record[$fetch_pos] = ", dump( $marc_rec ), $/;
337 dpavlin 574 warn "## sorted_marc_record = ", dump( \@sorted_marc_record ), $/;
338     warn "## subfield count = ", dump( $u ), $/;
339 dpavlin 550 }
340    
341     my $len = $#sorted_marc_record;
342     my $visited;
343     my $i = 0;
344     my $field;
345    
346     foreach ( 0 .. $len ) {
347    
348     # find next element which isn't visited
349     while ($visited->{$i}) {
350     $i = ($i + 1) % ($len + 1);
351 dpavlin 542 }
352    
353 dpavlin 550 # mark it visited
354     $visited->{$i}++;
355    
356 dpavlin 574 my $row = dclone( $sorted_marc_record[$i] );
357 dpavlin 550
358     # field and subfield which is key for
359     # marc_repeatable_subfield and u
360 dpavlin 572 my $fsf = $row->[0] . ( $row->[3] || '' );
361 dpavlin 550
362     if ($debug > 1) {
363    
364     print "### field so far [", $#$field, "] : ", dump( $field ), " ", $field ? 'T' : 'F', $/;
365     print "### this [$i]: ", dump( $row ),$/;
366     print "### sf: ", $row->[3], " vs ", $field->[3],
367     $marc_repeatable_subfield->{ $row->[0] . $row->[3] } ? ' (repeatable)' : '', $/,
368     if ($#$field >= 0);
369    
370     }
371    
372     # if field exists
373     if ( $#$field >= 0 ) {
374     if (
375     $row->[0] ne $field->[0] || # field
376     $row->[1] ne $field->[1] || # i1
377     $row->[2] ne $field->[2] # i2
378     ) {
379     push @m, $field;
380     warn "## saved/1 ", dump( $field ),$/ if ($debug);
381     $field = $row;
382    
383     } elsif (
384     ( $row->[3] lt $field->[-2] ) # subfield which is not next (e.g. a after c)
385     ||
386     ( $row->[3] eq $field->[-2] && # same subfield, but not repeatable
387     ! $marc_repeatable_subfield->{ $fsf }
388     )
389     ) {
390     push @m, $field;
391     warn "## saved/2 ", dump( $field ),$/ if ($debug);
392     $field = $row;
393    
394     } else {
395     # append new subfields to existing field
396     push @$field, ( $row->[3], $row->[4] );
397     }
398     } else {
399     # insert first field
400     $field = $row;
401     }
402    
403     if (! $marc_repeatable_subfield->{ $fsf }) {
404     # make step to next subfield
405     $i = ($i + $u->{ $fsf } ) % ($len + 1);
406     }
407 dpavlin 542 }
408    
409 dpavlin 550 if ($#$field >= 0) {
410     push @m, $field;
411     warn "## saved/3 ", dump( $field ),$/ if ($debug);
412     }
413 dpavlin 542
414 dpavlin 579 return \@m;
415 dpavlin 540 }
416    
417 dpavlin 813 =head2 _get_marc_leader
418    
419     Return leader from currently fetched record by L</_get_marc_fields>
420    
421     print WebPAC::Normalize::_get_marc_leader();
422    
423     =cut
424    
425     sub _get_marc_leader {
426     die "no fetch_pos, did you called _get_marc_fields first?" unless ( defined( $fetch_pos ) );
427     return $marc_leader->[ $fetch_pos ];
428     }
429    
430 dpavlin 554 =head2 _debug
431    
432     Change level of debug warnings
433    
434     _debug( 2 );
435    
436     =cut
437    
438     sub _debug {
439     my $l = shift;
440     return $debug unless defined($l);
441 dpavlin 568 warn "debug level $l",$/ if ($l > 0);
442 dpavlin 554 $debug = $l;
443     }
444    
445 dpavlin 540 =head1 Functions to create C<data_structure>
446    
447     Those functions generally have to first in your normalization file.
448    
449 dpavlin 912 =head2 search_display
450 dpavlin 433
451 dpavlin 912 Define output for L<search> and L<display> at the same time
452 dpavlin 433
453 dpavlin 912 search_display('Title', rec('200','a') );
454 dpavlin 13
455    
456     =cut
457    
458 dpavlin 912 sub search_display {
459     my $name = shift or die "search_display needs name as first argument";
460 dpavlin 536 my @o = grep { defined($_) && $_ ne '' } @_;
461     return unless (@o);
462     $out->{$name}->{search} = \@o;
463     $out->{$name}->{display} = \@o;
464     }
465 dpavlin 13
466 dpavlin 915 =head2 tag
467    
468     Old name for L<search_display>, but supported
469    
470     =cut
471    
472     sub tag {
473     search_display( @_ );
474     }
475    
476 dpavlin 536 =head2 display
477 dpavlin 13
478 dpavlin 912 Define output just for I<display>
479 dpavlin 125
480 dpavlin 536 @v = display('Title', rec('200','a') );
481 dpavlin 125
482 dpavlin 536 =cut
483 dpavlin 125
484 dpavlin 923 sub _field {
485     my $type = shift or confess "need type -- BUG?";
486     my $name = shift or confess "needs name as first argument";
487 dpavlin 536 my @o = grep { defined($_) && $_ ne '' } @_;
488     return unless (@o);
489 dpavlin 923 $out->{$name}->{$type} = \@o;
490 dpavlin 536 }
491 dpavlin 13
492 dpavlin 923 sub display { _field( 'display', @_ ) }
493    
494 dpavlin 536 =head2 search
495 dpavlin 13
496 dpavlin 536 Prepare values just for I<search>
497 dpavlin 13
498 dpavlin 536 @v = search('Title', rec('200','a') );
499 dpavlin 433
500 dpavlin 536 =cut
501 dpavlin 13
502 dpavlin 923 sub search { _field( 'search', @_ ) }
503 dpavlin 13
504 dpavlin 923 =head2 sorted
505    
506     Insert into lists which will be automatically sorted
507    
508     sorted('Title', rec('200','a') );
509    
510     =cut
511    
512     sub sorted { _field( 'sorted', @_ ) }
513    
514    
515 dpavlin 564 =head2 marc_leader
516    
517     Setup fields within MARC leader or get leader
518    
519     marc_leader('05','c');
520     my $leader = marc_leader();
521    
522     =cut
523    
524     sub marc_leader {
525     my ($offset,$value) = @_;
526    
527     if ($offset) {
528 dpavlin 813 $marc_leader->[ $marc_record_offset ]->{ $offset } = $value;
529 dpavlin 564 } else {
530 dpavlin 813
531     if (defined($marc_leader)) {
532     die "marc_leader not array = ", dump( $marc_leader ) unless (ref($marc_leader) eq 'ARRAY');
533     return $marc_leader->[ $marc_record_offset ];
534     } else {
535     return;
536     }
537 dpavlin 564 }
538     }
539    
540 dpavlin 815 =head2 marc_fixed
541    
542     Create control/indentifier fields with values in fixed positions
543    
544     marc_fixed('008', 00, '070402');
545     marc_fixed('008', 39, '|');
546    
547     Positions not specified will be filled with spaces (C<0x20>).
548    
549     There will be no effort to extend last specified value to full length of
550     field in standard.
551    
552     =cut
553    
554     sub marc_fixed {
555     my ($f, $pos, $val) = @_;
556     die "need marc(field, position, value)" unless defined($f) && defined($pos);
557    
558 dpavlin 889 confess "need val" unless defined $val;
559    
560 dpavlin 815 my $update = 0;
561    
562     map {
563     if ($_->[0] eq $f) {
564     my $old = $_->[1];
565 dpavlin 889 if (length($old) <= $pos) {
566 dpavlin 815 $_->[1] .= ' ' x ( $pos - length($old) ) . $val;
567 dpavlin 817 warn "## marc_fixed($f,$pos,'$val') append '$old' -> '$_->[1]'\n" if ($debug > 1);
568 dpavlin 815 } else {
569     $_->[1] = substr($old, 0, $pos) . $val . substr($old, $pos + length($val));
570 dpavlin 817 warn "## marc_fixed($f,$pos,'$val') update '$old' -> '$_->[1]'\n" if ($debug > 1);
571 dpavlin 815 }
572     $update++;
573     }
574     } @{ $marc_record->[ $marc_record_offset ] };
575    
576     if (! $update) {
577     my $v = ' ' x $pos . $val;
578     push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $v ];
579 dpavlin 817 warn "## marc_fixed($f,$pos,'val') created '$v'\n" if ($debug > 1);
580 dpavlin 815 }
581     }
582    
583 dpavlin 547 =head2 marc
584 dpavlin 540
585     Save value for MARC field
586    
587 dpavlin 547 marc('900','a', rec('200','a') );
588 dpavlin 571 marc('001', rec('000') );
589 dpavlin 540
590     =cut
591    
592 dpavlin 547 sub marc {
593     my $f = shift or die "marc needs field";
594     die "marc field must be numer" unless ($f =~ /^\d+$/);
595 dpavlin 540
596 dpavlin 571 my $sf;
597     if ($f >= 10) {
598     $sf = shift or die "marc needs subfield";
599     }
600 dpavlin 540
601 dpavlin 541 foreach (@_) {
602     my $v = $_; # make var read-write for Encode
603 dpavlin 543 next unless (defined($v) && $v !~ /^\s*$/);
604 dpavlin 548 my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
605 dpavlin 571 if (defined $sf) {
606 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $i1, $i2, $sf => $v ];
607 dpavlin 571 } else {
608 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $v ];
609 dpavlin 571 }
610 dpavlin 540 }
611     }
612    
613 dpavlin 547 =head2 marc_repeatable_subfield
614    
615     Save values for MARC repetable subfield
616    
617     marc_repeatable_subfield('910', 'z', rec('909') );
618    
619     =cut
620    
621     sub marc_repeatable_subfield {
622 dpavlin 550 my ($f,$sf) = @_;
623     die "marc_repeatable_subfield need field and subfield!\n" unless ($f && $sf);
624     $marc_repeatable_subfield->{ $f . $sf }++;
625 dpavlin 547 marc(@_);
626     }
627    
628     =head2 marc_indicators
629    
630     Set both indicators for MARC field
631    
632     marc_indicators('900', ' ', 1);
633    
634     Any indicator value other than C<0-9> will be treated as undefined.
635    
636     =cut
637    
638     sub marc_indicators {
639     my $f = shift || die "marc_indicators need field!\n";
640     my ($i1,$i2) = @_;
641     die "marc_indicators($f, ...) need i1!\n" unless(defined($i1));
642     die "marc_indicators($f, $i1, ...) need i2!\n" unless(defined($i2));
643    
644     $i1 = ' ' if ($i1 !~ /^\d$/);
645     $i2 = ' ' if ($i2 !~ /^\d$/);
646 dpavlin 548 @{ $marc_indicators->{$f} } = ($i1,$i2);
647 dpavlin 547 }
648    
649 dpavlin 562 =head2 marc_compose
650 dpavlin 547
651 dpavlin 562 Save values for each MARC subfield explicitly
652    
653     marc_compose('900',
654     'a', rec('200','a')
655     'b', rec('201','a')
656     'a', rec('200','b')
657     'c', rec('200','c')
658     );
659    
660 dpavlin 603 If you specify C<+> for subfield, value will be appended
661     to previous defined subfield.
662    
663 dpavlin 562 =cut
664    
665     sub marc_compose {
666     my $f = shift or die "marc_compose needs field";
667     die "marc_compose field must be numer" unless ($f =~ /^\d+$/);
668    
669     my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
670     my $m = [ $f, $i1, $i2 ];
671    
672 dpavlin 583 warn "### marc_compose input subfields = ", dump(@_),$/ if ($debug > 2);
673    
674 dpavlin 619 if ($#_ % 2 != 1) {
675     die "ERROR: marc_compose",dump($f,@_)," not valid (must be even).\nDo you need to add first() or join() around some argument?\n";
676     }
677    
678 dpavlin 562 while (@_) {
679 dpavlin 619 my $sf = shift;
680 dpavlin 565 my $v = shift;
681 dpavlin 562
682     next unless (defined($v) && $v !~ /^\s*$/);
683 dpavlin 568 warn "## ++ marc_compose($f,$sf,$v) ", dump( $m ),$/ if ($debug > 1);
684 dpavlin 603 if ($sf ne '+') {
685     push @$m, ( $sf, $v );
686     } else {
687     $m->[ $#$m ] .= $v;
688     }
689 dpavlin 562 }
690    
691 dpavlin 586 warn "## marc_compose current marc = ", dump( $m ),$/ if ($debug > 1);
692 dpavlin 562
693 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, $m if ($#{$m} > 2);
694 dpavlin 562 }
695    
696 dpavlin 574 =head2 marc_duplicate
697 dpavlin 562
698 dpavlin 574 Generate copy of current MARC record and continue working on copy
699    
700     marc_duplicate();
701    
702     Copies can be accessed using C<< _get_marc_fields( fetch_next => 1 ) >> or
703     C<< _get_marc_fields( offset => 42 ) >>.
704    
705     =cut
706    
707     sub marc_duplicate {
708     my $m = $marc_record->[ -1 ];
709     die "can't duplicate record which isn't defined" unless ($m);
710     push @{ $marc_record }, dclone( $m );
711 dpavlin 813 push @{ $marc_leader }, dclone( marc_leader() );
712     warn "## marc_duplicate = ", dump(@$marc_leader, @$marc_record), $/ if ($debug > 1);
713 dpavlin 574 $marc_record_offset = $#{ $marc_record };
714     warn "## marc_record_offset = $marc_record_offset", $/ if ($debug > 1);
715 dpavlin 813
716 dpavlin 574 }
717    
718     =head2 marc_remove
719    
720     Remove some field or subfield from MARC record.
721    
722     marc_remove('200');
723     marc_remove('200','a');
724    
725     This will erase field C<200> or C<200^a> from current MARC record.
726    
727 dpavlin 786 marc_remove('*');
728    
729     Will remove all fields in current MARC record.
730    
731 dpavlin 574 This is useful after calling C<marc_duplicate> or on it's own (but, you
732     should probably just remove that subfield definition if you are not
733     using C<marc_duplicate>).
734    
735     FIXME: support fields < 10.
736    
737     =cut
738    
739     sub marc_remove {
740     my ($f, $sf) = @_;
741    
742     die "marc_remove needs record number" unless defined($f);
743    
744     my $marc = $marc_record->[ $marc_record_offset ];
745    
746     warn "### marc_remove before = ", dump( $marc ), $/ if ($debug > 2);
747    
748 dpavlin 786 if ($f eq '*') {
749    
750     delete( $marc_record->[ $marc_record_offset ] );
751 dpavlin 788 warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
752 dpavlin 786
753     } else {
754    
755     my $i = 0;
756     foreach ( 0 .. $#{ $marc } ) {
757     last unless (defined $marc->[$i]);
758     warn "#### working on ",dump( @{ $marc->[$i] }), $/ if ($debug > 3);
759     if ($marc->[$i]->[0] eq $f) {
760     if (! defined $sf) {
761     # remove whole field
762     splice @$marc, $i, 1;
763     warn "#### slice \@\$marc, $i, 1 = ",dump( @{ $marc }), $/ if ($debug > 3);
764     $i--;
765     } else {
766     foreach my $j ( 0 .. (( $#{ $marc->[$i] } - 3 ) / 2) ) {
767     my $o = ($j * 2) + 3;
768     if ($marc->[$i]->[$o] eq $sf) {
769     # remove subfield
770     splice @{$marc->[$i]}, $o, 2;
771     warn "#### slice \@{\$marc->[$i]}, $o, 2 = ", dump( @{ $marc }), $/ if ($debug > 3);
772     # is record now empty?
773     if ($#{ $marc->[$i] } == 2) {
774     splice @$marc, $i, 1;
775     warn "#### slice \@\$marc, $i, 1 = ", dump( @{ $marc }), $/ if ($debug > 3);
776     $i--;
777     };
778     }
779 dpavlin 574 }
780     }
781     }
782 dpavlin 786 $i++;
783 dpavlin 574 }
784 dpavlin 786
785     warn "### marc_remove($f", $sf ? ",$sf" : "", ") after = ", dump( $marc ), $/ if ($debug > 2);
786    
787     $marc_record->[ $marc_record_offset ] = $marc;
788 dpavlin 574 }
789    
790     warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
791     }
792    
793 dpavlin 604 =head2 marc_original_order
794    
795     Copy all subfields preserving original order to marc field.
796    
797 dpavlin 616 marc_original_order( marc_field_number, original_input_field_number );
798 dpavlin 604
799 dpavlin 616 Please note that field numbers are consistent with other commands (marc
800     field number first), but somewhat counter-intuitive (destination and then
801     source).
802    
803 dpavlin 604 You might want to use this command if you are just renaming subfields or
804     using pre-processing modify_record in C<config.yml> and don't need any
805     post-processing or want to preserve order of original subfields.
806    
807 dpavlin 616
808 dpavlin 604 =cut
809    
810     sub marc_original_order {
811    
812 dpavlin 616 my ($to, $from) = @_;
813 dpavlin 604 die "marc_original_order needs from and to fields\n" unless ($from && $to);
814    
815 dpavlin 616 return unless defined($rec->{$from});
816    
817     my $r = $rec->{$from};
818 dpavlin 604 die "record field $from isn't array\n" unless (ref($r) eq 'ARRAY');
819    
820     my ($i1,$i2) = defined($marc_indicators->{$to}) ? @{ $marc_indicators->{$to} } : (' ',' ');
821 dpavlin 616 warn "## marc_original_order($to,$from) source = ", dump( $r ),$/ if ($debug > 1);
822 dpavlin 604
823     foreach my $d (@$r) {
824    
825 dpavlin 605 if (! defined($d->{subfields}) && ref($d->{subfields}) ne 'ARRAY') {
826 dpavlin 616 warn "# marc_original_order($to,$from): field $from doesn't have subfields specification\n";
827 dpavlin 605 next;
828     }
829    
830 dpavlin 604 my @sfs = @{ $d->{subfields} };
831    
832     die "field $from doesn't have even number of subfields specifications\n" unless($#sfs % 2 == 1);
833    
834 dpavlin 618 warn "#--> d: ",dump($d), "\n#--> sfs: ",dump(@sfs),$/ if ($debug > 2);
835 dpavlin 604
836     my $m = [ $to, $i1, $i2 ];
837    
838     while (my $sf = shift @sfs) {
839 dpavlin 618
840     warn "#--> sf: ",dump($sf), $/ if ($debug > 2);
841 dpavlin 604 my $offset = shift @sfs;
842     die "corrupted sufields specification for field $from\n" unless defined($offset);
843    
844     my $v;
845     if (ref($d->{$sf}) eq 'ARRAY') {
846     $v = $d->{$sf}->[$offset] if (defined($d->{$sf}->[$offset]));
847     } elsif ($offset == 0) {
848     $v = $d->{$sf};
849     } else {
850     die "field $from subfield '$sf' need occurence $offset which doesn't exist", dump($d->{$sf});
851     }
852     push @$m, ( $sf, $v ) if (defined($v));
853     }
854    
855     if ($#{$m} > 2) {
856     push @{ $marc_record->[ $marc_record_offset ] }, $m;
857     }
858     }
859    
860     warn "## marc_record = ", dump( $marc_record ),$/ if ($debug > 1);
861     }
862    
863 dpavlin 813 =head2 marc_count
864 dpavlin 604
865 dpavlin 813 Return number of MARC records created using L</marc_duplicate>.
866    
867     print "created ", marc_count(), " records";
868    
869     =cut
870    
871     sub marc_count {
872     return $#{ $marc_record };
873     }
874    
875    
876 dpavlin 540 =head1 Functions to extract data from input
877    
878     This function should be used inside functions to create C<data_structure> described
879     above.
880    
881 dpavlin 641 =head2 _pack_subfields_hash
882    
883 dpavlin 669 @subfields = _pack_subfields_hash( $h );
884     $subfields = _pack_subfields_hash( $h, 1 );
885 dpavlin 641
886 dpavlin 669 Return each subfield value in array or pack them all together and return scalar
887     with subfields (denoted by C<^>) and values.
888    
889 dpavlin 641 =cut
890    
891     sub _pack_subfields_hash {
892    
893 dpavlin 642 warn "## _pack_subfields_hash( ",dump(@_), " )\n" if ($debug > 1);
894 dpavlin 641
895     my ($h,$include_subfields) = @_;
896    
897 dpavlin 831 # sanity and ease of use
898     return $h if (ref($h) ne 'HASH');
899    
900 dpavlin 641 if ( defined($h->{subfields}) ) {
901     my $sfs = delete $h->{subfields} || die "no subfields?";
902     my @out;
903     while (@$sfs) {
904     my $sf = shift @$sfs;
905     push @out, '^' . $sf if ($include_subfields);
906     my $o = shift @$sfs;
907     if ($o == 0 && ref( $h->{$sf} ) ne 'ARRAY' ) {
908     # single element subfields are not arrays
909 dpavlin 669 #warn "====> $sf $o / $#$sfs ", dump( $sfs, $h->{$sf} ), "\n";
910 dpavlin 667
911 dpavlin 641 push @out, $h->{$sf};
912     } else {
913 dpavlin 669 #warn "====> $sf $o / $#$sfs ", dump( $sfs, $h->{$sf} ), "\n";
914 dpavlin 641 push @out, $h->{$sf}->[$o];
915     }
916     }
917 dpavlin 667 if ($include_subfields) {
918     return join('', @out);
919     } else {
920     return @out;
921     }
922 dpavlin 641 } else {
923 dpavlin 667 if ($include_subfields) {
924     my $out = '';
925 dpavlin 668 foreach my $sf (sort keys %$h) {
926 dpavlin 667 if (ref($h->{$sf}) eq 'ARRAY') {
927     $out .= '^' . $sf . join('^' . $sf, @{ $h->{$sf} });
928     } else {
929     $out .= '^' . $sf . $h->{$sf};
930     }
931     }
932     return $out;
933     } else {
934     # FIXME this should probably be in alphabetical order instead of hash order
935     values %{$h};
936     }
937 dpavlin 641 }
938     }
939    
940 dpavlin 536 =head2 rec1
941 dpavlin 371
942 dpavlin 536 Return all values in some field
943 dpavlin 371
944 dpavlin 536 @v = rec1('200')
945 dpavlin 15
946 dpavlin 536 TODO: order of values is probably same as in source data, need to investigate that
947 dpavlin 15
948 dpavlin 536 =cut
949 dpavlin 15
950 dpavlin 536 sub rec1 {
951     my $f = shift;
952 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
953 dpavlin 536 return unless (defined($rec) && defined($rec->{$f}));
954 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
955 dpavlin 536 if (ref($rec->{$f}) eq 'ARRAY') {
956 dpavlin 641 my @out;
957     foreach my $h ( @{ $rec->{$f} } ) {
958     if (ref($h) eq 'HASH') {
959     push @out, ( _pack_subfields_hash( $h ) );
960 dpavlin 31 } else {
961 dpavlin 641 push @out, $h;
962 dpavlin 31 }
963 dpavlin 641 }
964     return @out;
965 dpavlin 536 } elsif( defined($rec->{$f}) ) {
966     return $rec->{$f};
967 dpavlin 15 }
968     }
969    
970 dpavlin 536 =head2 rec2
971 dpavlin 15
972 dpavlin 536 Return all values in specific field and subfield
973 dpavlin 13
974 dpavlin 536 @v = rec2('200','a')
975 dpavlin 13
976     =cut
977    
978 dpavlin 536 sub rec2 {
979     my $f = shift;
980     return unless (defined($rec && $rec->{$f}));
981     my $sf = shift;
982 dpavlin 601 warn "rec2($f,$sf) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
983 dpavlin 589 return map {
984     if (ref($_->{$sf}) eq 'ARRAY') {
985     @{ $_->{$sf} };
986     } else {
987     $_->{$sf};
988     }
989     } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} };
990 dpavlin 536 }
991 dpavlin 13
992 dpavlin 536 =head2 rec
993 dpavlin 13
994 dpavlin 536 syntaxtic sugar for
995 dpavlin 13
996 dpavlin 536 @v = rec('200')
997     @v = rec('200','a')
998 dpavlin 13
999 dpavlin 750 If rec() returns just single value, it will
1000     return scalar, not array.
1001    
1002 dpavlin 536 =cut
1003 dpavlin 373
1004 dpavlin 979 sub frec {
1005     my @out = rec(@_);
1006     warn "rec(",dump(@_),") has more than one return value, ignoring\n" if $#out > 0;
1007     return shift @out;
1008     }
1009    
1010 dpavlin 536 sub rec {
1011 dpavlin 583 my @out;
1012 dpavlin 536 if ($#_ == 0) {
1013 dpavlin 583 @out = rec1(@_);
1014 dpavlin 536 } elsif ($#_ == 1) {
1015 dpavlin 583 @out = rec2(@_);
1016 dpavlin 13 }
1017 dpavlin 750 if ($#out == 0 && ! wantarray) {
1018     return $out[0];
1019     } elsif (@out) {
1020 dpavlin 583 return @out;
1021     } else {
1022     return '';
1023     }
1024 dpavlin 13 }
1025    
1026 dpavlin 536 =head2 regex
1027 dpavlin 15
1028 dpavlin 536 Apply regex to some or all values
1029 dpavlin 15
1030 dpavlin 536 @v = regex( 's/foo/bar/g', @v );
1031 dpavlin 15
1032     =cut
1033    
1034 dpavlin 536 sub regex {
1035     my $r = shift;
1036     my @out;
1037 dpavlin 550 #warn "r: $r\n", dump(\@_);
1038 dpavlin 536 foreach my $t (@_) {
1039     next unless ($t);
1040     eval "\$t =~ $r";
1041     push @out, $t if ($t && $t ne '');
1042 dpavlin 368 }
1043 dpavlin 536 return @out;
1044 dpavlin 15 }
1045    
1046 dpavlin 536 =head2 prefix
1047 dpavlin 15
1048 dpavlin 536 Prefix all values with a string
1049 dpavlin 15
1050 dpavlin 536 @v = prefix( 'my_', @v );
1051 dpavlin 15
1052     =cut
1053    
1054 dpavlin 536 sub prefix {
1055 dpavlin 819 my $p = shift;
1056     return @_ unless defined( $p );
1057 dpavlin 536 return map { $p . $_ } grep { defined($_) } @_;
1058     }
1059 dpavlin 15
1060 dpavlin 536 =head2 suffix
1061 dpavlin 15
1062 dpavlin 536 suffix all values with a string
1063 dpavlin 15
1064 dpavlin 536 @v = suffix( '_my', @v );
1065 dpavlin 15
1066 dpavlin 536 =cut
1067 dpavlin 15
1068 dpavlin 536 sub suffix {
1069 dpavlin 819 my $s = shift;
1070     return @_ unless defined( $s );
1071 dpavlin 536 return map { $_ . $s } grep { defined($_) } @_;
1072 dpavlin 15 }
1073    
1074 dpavlin 536 =head2 surround
1075 dpavlin 13
1076 dpavlin 536 surround all values with a two strings
1077 dpavlin 13
1078 dpavlin 536 @v = surround( 'prefix_', '_suffix', @v );
1079 dpavlin 13
1080     =cut
1081    
1082 dpavlin 536 sub surround {
1083 dpavlin 819 my $p = shift;
1084     my $s = shift;
1085     $p = '' unless defined( $p );
1086     $s = '' unless defined( $s );
1087 dpavlin 536 return map { $p . $_ . $s } grep { defined($_) } @_;
1088 dpavlin 13 }
1089    
1090 dpavlin 536 =head2 first
1091 dpavlin 13
1092 dpavlin 536 Return first element
1093 dpavlin 15
1094 dpavlin 536 $v = first( @v );
1095 dpavlin 13
1096     =cut
1097    
1098 dpavlin 536 sub first {
1099     my $r = shift;
1100     return $r;
1101 dpavlin 13 }
1102    
1103 dpavlin 536 =head2 lookup
1104 dpavlin 13
1105 dpavlin 536 Consult lookup hashes for some value
1106 dpavlin 13
1107 dpavlin 725 @v = lookup(
1108     sub {
1109     'ffkk/peri/mfn'.rec('000')
1110     },
1111     'ffkk','peri','200-a-200-e',
1112     sub {
1113     first(rec(200,'a')).' '.first(rec('200','e'))
1114     }
1115     );
1116 dpavlin 13
1117 dpavlin 725 Code like above will be B<automatically generated> using L<WebPAC::Parse> from
1118     normal lookup definition in C<conf/lookup/something.pl> which looks like:
1119 dpavlin 707
1120 dpavlin 725 lookup(
1121     # which results to return from record recorded in lookup
1122     sub { 'ffkk/peri/mfn' . rec('000') },
1123     # from which database and input
1124     'ffkk','peri',
1125     # such that following values match
1126     sub { first(rec(200,'a')) . ' ' . first(rec('200','e')) },
1127     # if this part is missing, we will try to match same fields
1128     # from lookup record and current one, or you can override
1129     # which records to use from current record using
1130     sub { rec('900','x') . ' ' . rec('900','y') },
1131     )
1132    
1133     You can think about this lookup as SQL (if that helps):
1134    
1135     select
1136     sub { what }
1137     from
1138     database, input
1139     where
1140     sub { filter from lookuped record }
1141     having
1142     sub { optional filter on current record }
1143    
1144     Easy as pie, right?
1145    
1146 dpavlin 13 =cut
1147    
1148 dpavlin 536 sub lookup {
1149 dpavlin 725 my ($what, $database, $input, $key, $having) = @_;
1150    
1151 dpavlin 766 confess "lookup needs 5 arguments: what, database, input, key, having\n" unless ($#_ == 4);
1152 dpavlin 725
1153 dpavlin 729 warn "## lookup ($database, $input, $key)", $/ if ($debug > 1);
1154 dpavlin 725 return unless (defined($lookup->{$database}->{$input}->{$key}));
1155    
1156 dpavlin 736 confess "lookup really need load_row_coderef added to data_structure\n" unless ($load_row_coderef);
1157 dpavlin 725
1158     my $mfns;
1159     my @having = $having->();
1160    
1161 dpavlin 729 warn "## having = ", dump( @having ) if ($debug > 2);
1162 dpavlin 725
1163     foreach my $h ( @having ) {
1164     if (defined($lookup->{$database}->{$input}->{$key}->{$h})) {
1165 dpavlin 752 warn "lookup for $database/$input/$key/$h return ",dump($lookup->{$database}->{$input}->{$key}->{$h}),"\n" if ($debug);
1166 dpavlin 725 $mfns->{$_}++ foreach keys %{ $lookup->{$database}->{$input}->{$key}->{$h} };
1167     }
1168 dpavlin 536 }
1169 dpavlin 725
1170     return unless ($mfns);
1171    
1172     my @mfns = sort keys %$mfns;
1173    
1174 dpavlin 750 warn "# lookup loading $database/$input/$key mfn ", join(",",@mfns)," having ",dump(@having),"\n" if ($debug);
1175 dpavlin 725
1176     my $old_rec = $rec;
1177     my @out;
1178    
1179     foreach my $mfn (@mfns) {
1180 dpavlin 736 $rec = $load_row_coderef->( $database, $input, $mfn );
1181 dpavlin 725
1182 dpavlin 752 warn "got $database/$input/$mfn = ", dump($rec), $/ if ($debug);
1183 dpavlin 725
1184     my @vals = $what->();
1185    
1186     push @out, ( @vals );
1187    
1188 dpavlin 752 warn "lookup for mfn $mfn returned ", dump(@vals), $/ if ($debug);
1189 dpavlin 725 }
1190    
1191     # if (ref($lookup->{$k}) eq 'ARRAY') {
1192     # return @{ $lookup->{$k} };
1193     # } else {
1194     # return $lookup->{$k};
1195     # }
1196    
1197     $rec = $old_rec;
1198    
1199 dpavlin 750 warn "## lookup returns = ", dump(@out), $/ if ($debug);
1200 dpavlin 725
1201 dpavlin 740 if ($#out == 0) {
1202     return $out[0];
1203     } else {
1204     return @out;
1205     }
1206 dpavlin 13 }
1207    
1208 dpavlin 707 =head2 save_into_lookup
1209    
1210 dpavlin 725 Save value into lookup. It associates current database, input
1211     and specific keys with one or more values which will be
1212     associated over MFN.
1213 dpavlin 707
1214 dpavlin 725 MFN will be extracted from first occurence current of field 000
1215     in current record, or if it doesn't exist from L<_set_config> C<_mfn>.
1216    
1217     my $nr = save_into_lookup($database,$input,$key,sub {
1218 dpavlin 707 # code which produce one or more values
1219     });
1220    
1221 dpavlin 725 It returns number of items saved.
1222 dpavlin 707
1223 dpavlin 725 This function shouldn't be called directly, it's called from code created by
1224     L<WebPAC::Parser>.
1225    
1226 dpavlin 707 =cut
1227    
1228     sub save_into_lookup {
1229 dpavlin 712 my ($database,$input,$key,$coderef) = @_;
1230     die "save_into_lookup needs database" unless defined($database);
1231     die "save_into_lookup needs input" unless defined($input);
1232     die "save_into_lookup needs key" unless defined($key);
1233 dpavlin 707 die "save_into_lookup needs CODE" unless ( defined($coderef) && ref($coderef) eq 'CODE' );
1234 dpavlin 725
1235 dpavlin 729 warn "## save_into_lookup rec = ", dump($rec), " config = ", dump($config), $/ if ($debug > 2);
1236 dpavlin 725
1237     my $mfn =
1238     defined($rec->{'000'}->[0]) ? $rec->{'000'}->[0] :
1239     defined($config->{_mfn}) ? $config->{_mfn} :
1240     die "mfn not defined or zero";
1241    
1242     my $nr = 0;
1243    
1244 dpavlin 707 foreach my $v ( $coderef->() ) {
1245 dpavlin 712 $lookup->{$database}->{$input}->{$key}->{$v}->{$mfn}++;
1246 dpavlin 721 warn "# saved lookup $database/$input/$key [$v] $mfn\n" if ($debug > 1);
1247 dpavlin 725 $nr++;
1248 dpavlin 707 }
1249 dpavlin 725
1250     return $nr;
1251 dpavlin 707 }
1252    
1253 dpavlin 595 =head2 config
1254    
1255     Consult config values stored in C<config.yml>
1256    
1257     # return database code (key under databases in yaml)
1258     $database_code = config(); # use _ from hash
1259     $database_name = config('name');
1260     $database_input_name = config('input name');
1261    
1262     Up to three levels are supported.
1263    
1264     =cut
1265    
1266     sub config {
1267     return unless ($config);
1268    
1269     my $p = shift;
1270    
1271     $p ||= '';
1272    
1273     my $v;
1274    
1275     warn "### getting config($p)\n" if ($debug > 1);
1276    
1277     my @p = split(/\s+/,$p);
1278     if ($#p < 0) {
1279     $v = $config->{ '_' }; # special, database code
1280     } else {
1281    
1282     my $c = dclone( $config );
1283    
1284     foreach my $k (@p) {
1285     warn "### k: $k c = ",dump($c),$/ if ($debug > 1);
1286     if (ref($c) eq 'ARRAY') {
1287     $c = shift @$c;
1288     warn "config($p) taking first occurence of '$k', probably not what you wanted!\n";
1289     last;
1290     }
1291    
1292     if (! defined($c->{$k}) ) {
1293     $c = undef;
1294     last;
1295     } else {
1296     $c = $c->{$k};
1297     }
1298     }
1299     $v = $c if ($c);
1300    
1301     }
1302    
1303     warn "## config( '$p' ) = ",dump( $v ),$/ if ($v && $debug);
1304     warn "config( '$p' ) is empty\n" if (! $v);
1305    
1306     return $v;
1307     }
1308    
1309     =head2 id
1310    
1311     Returns unique id of this record
1312    
1313     $id = id();
1314    
1315     Returns C<42/2> for 2nd occurence of MFN 42.
1316    
1317     =cut
1318    
1319     sub id {
1320     my $mfn = $config->{_mfn} || die "no _mfn in config data";
1321     return $mfn . $#{$marc_record} ? $#{$marc_record} + 1 : '';
1322     }
1323    
1324 dpavlin 536 =head2 join_with
1325 dpavlin 13
1326 dpavlin 536 Joins walues with some delimiter
1327 dpavlin 10
1328 dpavlin 536 $v = join_with(", ", @v);
1329 dpavlin 10
1330 dpavlin 536 =cut
1331 dpavlin 10
1332 dpavlin 536 sub join_with {
1333     my $d = shift;
1334 dpavlin 586 warn "### join_with('$d',",dump(@_),")\n" if ($debug > 2);
1335 dpavlin 583 my $v = join($d, grep { defined($_) && $_ ne '' } @_);
1336     return '' unless defined($v);
1337     return $v;
1338 dpavlin 536 }
1339 dpavlin 10
1340 dpavlin 562 =head2 split_rec_on
1341    
1342     Split record subfield on some regex and take one of parts out
1343    
1344     $a_before_semi_column =
1345     split_rec_on('200','a', /\s*;\s*/, $part);
1346    
1347     C<$part> is optional number of element. First element is
1348     B<1>, not 0!
1349    
1350     If there is no C<$part> parameter or C<$part> is 0, this function will
1351     return all values produced by splitting.
1352    
1353     =cut
1354    
1355     sub split_rec_on {
1356     die "split_rec_on need (fld,sf,regex[,part]" if ($#_ < 2);
1357    
1358     my ($fld, $sf, $regex, $part) = @_;
1359 dpavlin 568 warn "### regex ", ref($regex), $regex, $/ if ($debug > 2);
1360 dpavlin 562
1361     my @r = rec( $fld, $sf );
1362     my $v = shift @r;
1363 dpavlin 568 warn "### first rec($fld,$sf) = ",dump($v),$/ if ($debug > 2);
1364 dpavlin 562
1365 dpavlin 604 return '' if ( ! defined($v) || $v =~ /^\s*$/);
1366 dpavlin 566
1367 dpavlin 562 my @s = split( $regex, $v );
1368 dpavlin 568 warn "## split_rec_on($fld,$sf,$regex,$part) = ",dump(@s),$/ if ($debug > 1);
1369 dpavlin 566 if ($part && $part > 0) {
1370 dpavlin 562 return $s[ $part - 1 ];
1371     } else {
1372 dpavlin 571 return @s;
1373 dpavlin 562 }
1374     }
1375    
1376 dpavlin 785 my $hash;
1377    
1378     =head2 set
1379    
1380     set( key => 'value' );
1381    
1382     =cut
1383    
1384     sub set {
1385     my ($k,$v) = @_;
1386 dpavlin 810 warn "## set ( $k => ", dump($v), " )", $/ if ( $debug );
1387 dpavlin 785 $hash->{$k} = $v;
1388     };
1389    
1390     =head2 get
1391    
1392     get( 'key' );
1393    
1394     =cut
1395    
1396     sub get {
1397     my $k = shift || return;
1398     my $v = $hash->{$k};
1399 dpavlin 810 warn "## get $k = ", dump( $v ), $/ if ( $debug );
1400 dpavlin 785 return $v;
1401     }
1402    
1403 dpavlin 791 =head2 count
1404 dpavlin 785
1405 dpavlin 791 if ( count( @result ) == 1 ) {
1406     # do something if only 1 result is there
1407     }
1408    
1409     =cut
1410    
1411     sub count {
1412 dpavlin 810 warn "## count ",dump(@_),$/ if ( $debug );
1413 dpavlin 791 return @_ . '';
1414     }
1415    
1416 dpavlin 536 # END
1417     1;

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