/[webpac2]/trunk/lib/WebPAC/Normalize.pm
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Revision 619 - (show annotations)
Fri Aug 25 12:31:06 2006 UTC (16 years, 5 months ago) by dpavlin
File size: 21681 byte(s)
 r867@llin:  dpavlin | 2006-08-25 14:32:05 +0200
 statistics now show data before modify_records

1 package WebPAC::Normalize;
2 use Exporter 'import';
3 @EXPORT = qw/
4 _set_rec _set_lookup
5 _get_ds _clean_ds
6 _debug
7
8 tag search display
9 marc marc_indicators marc_repeatable_subfield
10 marc_compose marc_leader
11 marc_duplicate marc_remove
12 marc_original_order
13
14 rec1 rec2 rec
15 regex prefix suffix surround
16 first lookup join_with
17
18 split_rec_on
19 /;
20
21 use warnings;
22 use strict;
23
24 #use base qw/WebPAC::Common/;
25 use Data::Dump qw/dump/;
26 use Encode qw/from_to/;
27 use Storable qw/dclone/;
28
29 # debugging warn(s)
30 my $debug = 0;
31
32
33 =head1 NAME
34
35 WebPAC::Normalize - describe normalisaton rules using sets
36
37 =head1 VERSION
38
39 Version 0.16
40
41 =cut
42
43 our $VERSION = '0.16';
44
45 =head1 SYNOPSIS
46
47 This module uses C<conf/normalize/*.pl> files to perform normalisation
48 from input records using perl functions which are specialized for set
49 processing.
50
51 Sets are implemented as arrays, and normalisation file is valid perl, which
52 means that you check it's validity before running WebPAC using
53 C<perl -c normalize.pl>.
54
55 Normalisation can generate multiple output normalized data. For now, supported output
56 types (on the left side of definition) are: C<tag>, C<display>, C<search> and
57 C<marc>.
58
59 =head1 FUNCTIONS
60
61 Functions which start with C<_> are private and used by WebPAC internally.
62 All other functions are available for use within normalisation rules.
63
64 =head2 data_structure
65
66 Return data structure
67
68 my $ds = WebPAC::Normalize::data_structure(
69 lookup => $lookup->lookup_hash,
70 row => $row,
71 rules => $normalize_pl_config,
72 marc_encoding => 'utf-8',
73 config => $config,
74 );
75
76 Options C<lookup>, C<row>, C<rules> and C<log> are mandatory while all
77 other are optional.
78
79 This function will B<die> if normalizastion can't be evaled.
80
81 Since this function isn't exported you have to call it with
82 C<WebPAC::Normalize::data_structure>.
83
84 =cut
85
86 sub data_structure {
87 my $arg = {@_};
88
89 die "need row argument" unless ($arg->{row});
90 die "need normalisation argument" unless ($arg->{rules});
91
92 no strict 'subs';
93 _set_lookup( $arg->{lookup} );
94 _set_rec( $arg->{row} );
95 _set_config( $arg->{config} );
96 _clean_ds( %{ $arg } );
97 eval "$arg->{rules}";
98 die "error evaling $arg->{rules}: $@\n" if ($@);
99
100 return _get_ds();
101 }
102
103 =head2 _set_rec
104
105 Set current record hash
106
107 _set_rec( $rec );
108
109 =cut
110
111 my $rec;
112
113 sub _set_rec {
114 $rec = shift or die "no record hash";
115 }
116
117 =head2 _set_config
118
119 Set current config hash
120
121 _set_config( $config );
122
123 Magic keys are:
124
125 =over 4
126
127 =item _
128
129 Code of current database
130
131 =item _mfn
132
133 Current MFN
134
135 =back
136
137 =cut
138
139 my $config;
140
141 sub _set_config {
142 $config = shift;
143 }
144
145 =head2 _get_ds
146
147 Return hash formatted as data structure
148
149 my $ds = _get_ds();
150
151 =cut
152
153 my ($out, $marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators);
154 my ($marc_record_offset, $marc_fetch_offset) = (0, 0);
155
156 sub _get_ds {
157 return $out;
158 }
159
160 =head2 _clean_ds
161
162 Clean data structure hash for next record
163
164 _clean_ds();
165
166 =cut
167
168 sub _clean_ds {
169 my $a = {@_};
170 ($out,$marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators) = ();
171 ($marc_record_offset, $marc_fetch_offset) = (0,0);
172 $marc_encoding = $a->{marc_encoding};
173 }
174
175 =head2 _set_lookup
176
177 Set current lookup hash
178
179 _set_lookup( $lookup );
180
181 =cut
182
183 my $lookup;
184
185 sub _set_lookup {
186 $lookup = shift;
187 }
188
189 =head2 _get_marc_fields
190
191 Get all fields defined by calls to C<marc>
192
193 $marc->add_fields( WebPAC::Normalize:_get_marc_fields() );
194
195 We are using I<magic> which detect repeatable fields only from
196 sequence of field/subfield data generated by normalization.
197
198 Repeatable field is created when there is second occurence of same subfield or
199 if any of indicators are different.
200
201 This is sane for most cases. Something like:
202
203 900a-1 900b-1 900c-1
204 900a-2 900b-2
205 900a-3
206
207 will be created from any combination of:
208
209 900a-1 900a-2 900a-3 900b-1 900b-2 900c-1
210
211 and following rules:
212
213 marc('900','a', rec('200','a') );
214 marc('900','b', rec('200','b') );
215 marc('900','c', rec('200','c') );
216
217 which might not be what you have in mind. If you need repeatable subfield,
218 define it using C<marc_repeatable_subfield> like this:
219
220 marc_repeatable_subfield('900','a');
221 marc('900','a', rec('200','a') );
222 marc('900','b', rec('200','b') );
223 marc('900','c', rec('200','c') );
224
225 will create:
226
227 900a-1 900a-2 900a-3 900b-1 900c-1
228 900b-2
229
230 There is also support for returning next or specific using:
231
232 while (my $mf = WebPAC::Normalize:_get_marc_fields( fetch_next => 1 ) ) {
233 # do something with $mf
234 }
235
236 will always return fields from next MARC record or
237
238 my $mf = WebPAC::Normalize::_get_marc_fields( offset => 42 );
239
240 will return 42th copy record (if it exists).
241
242 =cut
243
244 sub _get_marc_fields {
245
246 my $arg = {@_};
247 warn "### _get_marc_fields arg: ", dump($arg), $/ if ($debug > 2);
248 my $offset = $marc_fetch_offset;
249 if ($arg->{offset}) {
250 $offset = $arg->{offset};
251 } elsif($arg->{fetch_next}) {
252 $marc_fetch_offset++;
253 }
254
255 return if (! $marc_record || ref($marc_record) ne 'ARRAY');
256
257 warn "### full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 2);
258
259 my $marc_rec = $marc_record->[ $offset ];
260
261 warn "## _get_marc_fields (at offset: $offset) -- marc_record = ", dump( @$marc_rec ), $/ if ($debug > 1);
262
263 return if (! $marc_rec || ref($marc_rec) ne 'ARRAY' || $#{ $marc_rec } < 0);
264
265 # first, sort all existing fields
266 # XXX might not be needed, but modern perl might randomize elements in hash
267 my @sorted_marc_record = sort {
268 $a->[0] . ( $a->[3] || '' ) cmp $b->[0] . ( $b->[3] || '')
269 } @{ $marc_rec };
270
271 @sorted_marc_record = @{ $marc_rec }; ### FIXME disable sorting
272
273 # output marc fields
274 my @m;
275
276 # count unique field-subfields (used for offset when walking to next subfield)
277 my $u;
278 map { $u->{ $_->[0] . ( $_->[3] || '') }++ } @sorted_marc_record;
279
280 if ($debug) {
281 warn "## marc_repeatable_subfield = ", dump( $marc_repeatable_subfield ), $/ if ( $marc_repeatable_subfield );
282 warn "## marc_record[$offset] = ", dump( $marc_rec ), $/;
283 warn "## sorted_marc_record = ", dump( \@sorted_marc_record ), $/;
284 warn "## subfield count = ", dump( $u ), $/;
285 }
286
287 my $len = $#sorted_marc_record;
288 my $visited;
289 my $i = 0;
290 my $field;
291
292 foreach ( 0 .. $len ) {
293
294 # find next element which isn't visited
295 while ($visited->{$i}) {
296 $i = ($i + 1) % ($len + 1);
297 }
298
299 # mark it visited
300 $visited->{$i}++;
301
302 my $row = dclone( $sorted_marc_record[$i] );
303
304 # field and subfield which is key for
305 # marc_repeatable_subfield and u
306 my $fsf = $row->[0] . ( $row->[3] || '' );
307
308 if ($debug > 1) {
309
310 print "### field so far [", $#$field, "] : ", dump( $field ), " ", $field ? 'T' : 'F', $/;
311 print "### this [$i]: ", dump( $row ),$/;
312 print "### sf: ", $row->[3], " vs ", $field->[3],
313 $marc_repeatable_subfield->{ $row->[0] . $row->[3] } ? ' (repeatable)' : '', $/,
314 if ($#$field >= 0);
315
316 }
317
318 # if field exists
319 if ( $#$field >= 0 ) {
320 if (
321 $row->[0] ne $field->[0] || # field
322 $row->[1] ne $field->[1] || # i1
323 $row->[2] ne $field->[2] # i2
324 ) {
325 push @m, $field;
326 warn "## saved/1 ", dump( $field ),$/ if ($debug);
327 $field = $row;
328
329 } elsif (
330 ( $row->[3] lt $field->[-2] ) # subfield which is not next (e.g. a after c)
331 ||
332 ( $row->[3] eq $field->[-2] && # same subfield, but not repeatable
333 ! $marc_repeatable_subfield->{ $fsf }
334 )
335 ) {
336 push @m, $field;
337 warn "## saved/2 ", dump( $field ),$/ if ($debug);
338 $field = $row;
339
340 } else {
341 # append new subfields to existing field
342 push @$field, ( $row->[3], $row->[4] );
343 }
344 } else {
345 # insert first field
346 $field = $row;
347 }
348
349 if (! $marc_repeatable_subfield->{ $fsf }) {
350 # make step to next subfield
351 $i = ($i + $u->{ $fsf } ) % ($len + 1);
352 }
353 }
354
355 if ($#$field >= 0) {
356 push @m, $field;
357 warn "## saved/3 ", dump( $field ),$/ if ($debug);
358 }
359
360 return \@m;
361 }
362
363 =head2 _debug
364
365 Change level of debug warnings
366
367 _debug( 2 );
368
369 =cut
370
371 sub _debug {
372 my $l = shift;
373 return $debug unless defined($l);
374 warn "debug level $l",$/ if ($l > 0);
375 $debug = $l;
376 }
377
378 =head1 Functions to create C<data_structure>
379
380 Those functions generally have to first in your normalization file.
381
382 =head2 tag
383
384 Define new tag for I<search> and I<display>.
385
386 tag('Title', rec('200','a') );
387
388
389 =cut
390
391 sub tag {
392 my $name = shift or die "tag needs name as first argument";
393 my @o = grep { defined($_) && $_ ne '' } @_;
394 return unless (@o);
395 $out->{$name}->{tag} = $name;
396 $out->{$name}->{search} = \@o;
397 $out->{$name}->{display} = \@o;
398 }
399
400 =head2 display
401
402 Define tag just for I<display>
403
404 @v = display('Title', rec('200','a') );
405
406 =cut
407
408 sub display {
409 my $name = shift or die "display needs name as first argument";
410 my @o = grep { defined($_) && $_ ne '' } @_;
411 return unless (@o);
412 $out->{$name}->{tag} = $name;
413 $out->{$name}->{display} = \@o;
414 }
415
416 =head2 search
417
418 Prepare values just for I<search>
419
420 @v = search('Title', rec('200','a') );
421
422 =cut
423
424 sub search {
425 my $name = shift or die "search needs name as first argument";
426 my @o = grep { defined($_) && $_ ne '' } @_;
427 return unless (@o);
428 $out->{$name}->{tag} = $name;
429 $out->{$name}->{search} = \@o;
430 }
431
432 =head2 marc_leader
433
434 Setup fields within MARC leader or get leader
435
436 marc_leader('05','c');
437 my $leader = marc_leader();
438
439 =cut
440
441 sub marc_leader {
442 my ($offset,$value) = @_;
443
444 if ($offset) {
445 $out->{' leader'}->{ $offset } = $value;
446 } else {
447 return $out->{' leader'};
448 }
449 }
450
451 =head2 marc
452
453 Save value for MARC field
454
455 marc('900','a', rec('200','a') );
456 marc('001', rec('000') );
457
458 =cut
459
460 sub marc {
461 my $f = shift or die "marc needs field";
462 die "marc field must be numer" unless ($f =~ /^\d+$/);
463
464 my $sf;
465 if ($f >= 10) {
466 $sf = shift or die "marc needs subfield";
467 }
468
469 foreach (@_) {
470 my $v = $_; # make var read-write for Encode
471 next unless (defined($v) && $v !~ /^\s*$/);
472 from_to($v, 'iso-8859-2', $marc_encoding) if ($marc_encoding);
473 my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
474 if (defined $sf) {
475 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $i1, $i2, $sf => $v ];
476 } else {
477 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $v ];
478 }
479 }
480 }
481
482 =head2 marc_repeatable_subfield
483
484 Save values for MARC repetable subfield
485
486 marc_repeatable_subfield('910', 'z', rec('909') );
487
488 =cut
489
490 sub marc_repeatable_subfield {
491 my ($f,$sf) = @_;
492 die "marc_repeatable_subfield need field and subfield!\n" unless ($f && $sf);
493 $marc_repeatable_subfield->{ $f . $sf }++;
494 marc(@_);
495 }
496
497 =head2 marc_indicators
498
499 Set both indicators for MARC field
500
501 marc_indicators('900', ' ', 1);
502
503 Any indicator value other than C<0-9> will be treated as undefined.
504
505 =cut
506
507 sub marc_indicators {
508 my $f = shift || die "marc_indicators need field!\n";
509 my ($i1,$i2) = @_;
510 die "marc_indicators($f, ...) need i1!\n" unless(defined($i1));
511 die "marc_indicators($f, $i1, ...) need i2!\n" unless(defined($i2));
512
513 $i1 = ' ' if ($i1 !~ /^\d$/);
514 $i2 = ' ' if ($i2 !~ /^\d$/);
515 @{ $marc_indicators->{$f} } = ($i1,$i2);
516 }
517
518 =head2 marc_compose
519
520 Save values for each MARC subfield explicitly
521
522 marc_compose('900',
523 'a', rec('200','a')
524 'b', rec('201','a')
525 'a', rec('200','b')
526 'c', rec('200','c')
527 );
528
529 If you specify C<+> for subfield, value will be appended
530 to previous defined subfield.
531
532 =cut
533
534 sub marc_compose {
535 my $f = shift or die "marc_compose needs field";
536 die "marc_compose field must be numer" unless ($f =~ /^\d+$/);
537
538 my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
539 my $m = [ $f, $i1, $i2 ];
540
541 warn "### marc_compose input subfields = ", dump(@_),$/ if ($debug > 2);
542
543 if ($#_ % 2 != 1) {
544 die "ERROR: marc_compose",dump($f,@_)," not valid (must be even).\nDo you need to add first() or join() around some argument?\n";
545 }
546
547 while (@_) {
548 my $sf = shift;
549 my $v = shift;
550
551 next unless (defined($v) && $v !~ /^\s*$/);
552 from_to($v, 'iso-8859-2', $marc_encoding) if ($marc_encoding);
553 warn "## ++ marc_compose($f,$sf,$v) ", dump( $m ),$/ if ($debug > 1);
554 if ($sf ne '+') {
555 push @$m, ( $sf, $v );
556 } else {
557 $m->[ $#$m ] .= $v;
558 }
559 }
560
561 warn "## marc_compose current marc = ", dump( $m ),$/ if ($debug > 1);
562
563 push @{ $marc_record->[ $marc_record_offset ] }, $m if ($#{$m} > 2);
564 }
565
566 =head2 marc_duplicate
567
568 Generate copy of current MARC record and continue working on copy
569
570 marc_duplicate();
571
572 Copies can be accessed using C<< _get_marc_fields( fetch_next => 1 ) >> or
573 C<< _get_marc_fields( offset => 42 ) >>.
574
575 =cut
576
577 sub marc_duplicate {
578 my $m = $marc_record->[ -1 ];
579 die "can't duplicate record which isn't defined" unless ($m);
580 push @{ $marc_record }, dclone( $m );
581 warn "## marc_duplicate = ", dump(@$marc_record), $/ if ($debug > 1);
582 $marc_record_offset = $#{ $marc_record };
583 warn "## marc_record_offset = $marc_record_offset", $/ if ($debug > 1);
584 }
585
586 =head2 marc_remove
587
588 Remove some field or subfield from MARC record.
589
590 marc_remove('200');
591 marc_remove('200','a');
592
593 This will erase field C<200> or C<200^a> from current MARC record.
594
595 This is useful after calling C<marc_duplicate> or on it's own (but, you
596 should probably just remove that subfield definition if you are not
597 using C<marc_duplicate>).
598
599 FIXME: support fields < 10.
600
601 =cut
602
603 sub marc_remove {
604 my ($f, $sf) = @_;
605
606 die "marc_remove needs record number" unless defined($f);
607
608 my $marc = $marc_record->[ $marc_record_offset ];
609
610 warn "### marc_remove before = ", dump( $marc ), $/ if ($debug > 2);
611
612 my $i = 0;
613 foreach ( 0 .. $#{ $marc } ) {
614 last unless (defined $marc->[$i]);
615 warn "#### working on ",dump( @{ $marc->[$i] }), $/ if ($debug > 3);
616 if ($marc->[$i]->[0] eq $f) {
617 if (! defined $sf) {
618 # remove whole field
619 splice @$marc, $i, 1;
620 warn "#### slice \@\$marc, $i, 1 = ",dump( @{ $marc }), $/ if ($debug > 3);
621 $i--;
622 } else {
623 foreach my $j ( 0 .. (( $#{ $marc->[$i] } - 3 ) / 2) ) {
624 my $o = ($j * 2) + 3;
625 if ($marc->[$i]->[$o] eq $sf) {
626 # remove subfield
627 splice @{$marc->[$i]}, $o, 2;
628 warn "#### slice \@{\$marc->[$i]}, $o, 2 = ", dump( @{ $marc }), $/ if ($debug > 3);
629 # is record now empty?
630 if ($#{ $marc->[$i] } == 2) {
631 splice @$marc, $i, 1;
632 warn "#### slice \@\$marc, $i, 1 = ", dump( @{ $marc }), $/ if ($debug > 3);
633 $i--;
634 };
635 }
636 }
637 }
638 }
639 $i++;
640 }
641
642 warn "### marc_remove($f", $sf ? ",$sf" : "", ") after = ", dump( $marc ), $/ if ($debug > 2);
643
644 $marc_record->[ $marc_record_offset ] = $marc;
645
646 warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
647 }
648
649 =head2 marc_original_order
650
651 Copy all subfields preserving original order to marc field.
652
653 marc_original_order( marc_field_number, original_input_field_number );
654
655 Please note that field numbers are consistent with other commands (marc
656 field number first), but somewhat counter-intuitive (destination and then
657 source).
658
659 You might want to use this command if you are just renaming subfields or
660 using pre-processing modify_record in C<config.yml> and don't need any
661 post-processing or want to preserve order of original subfields.
662
663
664 =cut
665
666 sub marc_original_order {
667
668 my ($to, $from) = @_;
669 die "marc_original_order needs from and to fields\n" unless ($from && $to);
670
671 return unless defined($rec->{$from});
672
673 my $r = $rec->{$from};
674 die "record field $from isn't array\n" unless (ref($r) eq 'ARRAY');
675
676 my ($i1,$i2) = defined($marc_indicators->{$to}) ? @{ $marc_indicators->{$to} } : (' ',' ');
677 warn "## marc_original_order($to,$from) source = ", dump( $r ),$/ if ($debug > 1);
678
679 foreach my $d (@$r) {
680
681 if (! defined($d->{subfields}) && ref($d->{subfields}) ne 'ARRAY') {
682 warn "# marc_original_order($to,$from): field $from doesn't have subfields specification\n";
683 next;
684 }
685
686 my @sfs = @{ $d->{subfields} };
687
688 die "field $from doesn't have even number of subfields specifications\n" unless($#sfs % 2 == 1);
689
690 warn "#--> d: ",dump($d), "\n#--> sfs: ",dump(@sfs),$/ if ($debug > 2);
691
692 my $m = [ $to, $i1, $i2 ];
693
694 while (my $sf = shift @sfs) {
695
696 warn "#--> sf: ",dump($sf), $/ if ($debug > 2);
697 my $offset = shift @sfs;
698 die "corrupted sufields specification for field $from\n" unless defined($offset);
699
700 my $v;
701 if (ref($d->{$sf}) eq 'ARRAY') {
702 $v = $d->{$sf}->[$offset] if (defined($d->{$sf}->[$offset]));
703 } elsif ($offset == 0) {
704 $v = $d->{$sf};
705 } else {
706 die "field $from subfield '$sf' need occurence $offset which doesn't exist", dump($d->{$sf});
707 }
708 push @$m, ( $sf, $v ) if (defined($v));
709 }
710
711 if ($#{$m} > 2) {
712 push @{ $marc_record->[ $marc_record_offset ] }, $m;
713 }
714 }
715
716 warn "## marc_record = ", dump( $marc_record ),$/ if ($debug > 1);
717 }
718
719
720 =head1 Functions to extract data from input
721
722 This function should be used inside functions to create C<data_structure> described
723 above.
724
725 =head2 rec1
726
727 Return all values in some field
728
729 @v = rec1('200')
730
731 TODO: order of values is probably same as in source data, need to investigate that
732
733 =cut
734
735 sub rec1 {
736 my $f = shift;
737 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
738 return unless (defined($rec) && defined($rec->{$f}));
739 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
740 if (ref($rec->{$f}) eq 'ARRAY') {
741 return map {
742 if (ref($_) eq 'HASH') {
743 values %{$_};
744 } else {
745 $_;
746 }
747 } @{ $rec->{$f} };
748 } elsif( defined($rec->{$f}) ) {
749 return $rec->{$f};
750 }
751 }
752
753 =head2 rec2
754
755 Return all values in specific field and subfield
756
757 @v = rec2('200','a')
758
759 =cut
760
761 sub rec2 {
762 my $f = shift;
763 return unless (defined($rec && $rec->{$f}));
764 my $sf = shift;
765 warn "rec2($f,$sf) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
766 return map {
767 if (ref($_->{$sf}) eq 'ARRAY') {
768 @{ $_->{$sf} };
769 } else {
770 $_->{$sf};
771 }
772 } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} };
773 }
774
775 =head2 rec
776
777 syntaxtic sugar for
778
779 @v = rec('200')
780 @v = rec('200','a')
781
782 =cut
783
784 sub rec {
785 my @out;
786 if ($#_ == 0) {
787 @out = rec1(@_);
788 } elsif ($#_ == 1) {
789 @out = rec2(@_);
790 }
791 if (@out) {
792 return @out;
793 } else {
794 return '';
795 }
796 }
797
798 =head2 regex
799
800 Apply regex to some or all values
801
802 @v = regex( 's/foo/bar/g', @v );
803
804 =cut
805
806 sub regex {
807 my $r = shift;
808 my @out;
809 #warn "r: $r\n", dump(\@_);
810 foreach my $t (@_) {
811 next unless ($t);
812 eval "\$t =~ $r";
813 push @out, $t if ($t && $t ne '');
814 }
815 return @out;
816 }
817
818 =head2 prefix
819
820 Prefix all values with a string
821
822 @v = prefix( 'my_', @v );
823
824 =cut
825
826 sub prefix {
827 my $p = shift or return;
828 return map { $p . $_ } grep { defined($_) } @_;
829 }
830
831 =head2 suffix
832
833 suffix all values with a string
834
835 @v = suffix( '_my', @v );
836
837 =cut
838
839 sub suffix {
840 my $s = shift or die "suffix needs string as first argument";
841 return map { $_ . $s } grep { defined($_) } @_;
842 }
843
844 =head2 surround
845
846 surround all values with a two strings
847
848 @v = surround( 'prefix_', '_suffix', @v );
849
850 =cut
851
852 sub surround {
853 my $p = shift or die "surround need prefix as first argument";
854 my $s = shift or die "surround needs suffix as second argument";
855 return map { $p . $_ . $s } grep { defined($_) } @_;
856 }
857
858 =head2 first
859
860 Return first element
861
862 $v = first( @v );
863
864 =cut
865
866 sub first {
867 my $r = shift;
868 return $r;
869 }
870
871 =head2 lookup
872
873 Consult lookup hashes for some value
874
875 @v = lookup( $v );
876 @v = lookup( @v );
877
878 =cut
879
880 sub lookup {
881 my $k = shift or return;
882 return unless (defined($lookup->{$k}));
883 if (ref($lookup->{$k}) eq 'ARRAY') {
884 return @{ $lookup->{$k} };
885 } else {
886 return $lookup->{$k};
887 }
888 }
889
890 =head2 config
891
892 Consult config values stored in C<config.yml>
893
894 # return database code (key under databases in yaml)
895 $database_code = config(); # use _ from hash
896 $database_name = config('name');
897 $database_input_name = config('input name');
898 $tag = config('input normalize tag');
899
900 Up to three levels are supported.
901
902 =cut
903
904 sub config {
905 return unless ($config);
906
907 my $p = shift;
908
909 $p ||= '';
910
911 my $v;
912
913 warn "### getting config($p)\n" if ($debug > 1);
914
915 my @p = split(/\s+/,$p);
916 if ($#p < 0) {
917 $v = $config->{ '_' }; # special, database code
918 } else {
919
920 my $c = dclone( $config );
921
922 foreach my $k (@p) {
923 warn "### k: $k c = ",dump($c),$/ if ($debug > 1);
924 if (ref($c) eq 'ARRAY') {
925 $c = shift @$c;
926 warn "config($p) taking first occurence of '$k', probably not what you wanted!\n";
927 last;
928 }
929
930 if (! defined($c->{$k}) ) {
931 $c = undef;
932 last;
933 } else {
934 $c = $c->{$k};
935 }
936 }
937 $v = $c if ($c);
938
939 }
940
941 warn "## config( '$p' ) = ",dump( $v ),$/ if ($v && $debug);
942 warn "config( '$p' ) is empty\n" if (! $v);
943
944 return $v;
945 }
946
947 =head2 id
948
949 Returns unique id of this record
950
951 $id = id();
952
953 Returns C<42/2> for 2nd occurence of MFN 42.
954
955 =cut
956
957 sub id {
958 my $mfn = $config->{_mfn} || die "no _mfn in config data";
959 return $mfn . $#{$marc_record} ? $#{$marc_record} + 1 : '';
960 }
961
962 =head2 join_with
963
964 Joins walues with some delimiter
965
966 $v = join_with(", ", @v);
967
968 =cut
969
970 sub join_with {
971 my $d = shift;
972 warn "### join_with('$d',",dump(@_),")\n" if ($debug > 2);
973 my $v = join($d, grep { defined($_) && $_ ne '' } @_);
974 return '' unless defined($v);
975 return $v;
976 }
977
978 =head2 split_rec_on
979
980 Split record subfield on some regex and take one of parts out
981
982 $a_before_semi_column =
983 split_rec_on('200','a', /\s*;\s*/, $part);
984
985 C<$part> is optional number of element. First element is
986 B<1>, not 0!
987
988 If there is no C<$part> parameter or C<$part> is 0, this function will
989 return all values produced by splitting.
990
991 =cut
992
993 sub split_rec_on {
994 die "split_rec_on need (fld,sf,regex[,part]" if ($#_ < 2);
995
996 my ($fld, $sf, $regex, $part) = @_;
997 warn "### regex ", ref($regex), $regex, $/ if ($debug > 2);
998
999 my @r = rec( $fld, $sf );
1000 my $v = shift @r;
1001 warn "### first rec($fld,$sf) = ",dump($v),$/ if ($debug > 2);
1002
1003 return '' if ( ! defined($v) || $v =~ /^\s*$/);
1004
1005 my @s = split( $regex, $v );
1006 warn "## split_rec_on($fld,$sf,$regex,$part) = ",dump(@s),$/ if ($debug > 1);
1007 if ($part && $part > 0) {
1008 return $s[ $part - 1 ];
1009 } else {
1010 return @s;
1011 }
1012 }
1013
1014 # END
1015 1;

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