/[webpac2]/trunk/lib/WebPAC/Normalize.pm
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
ViewVC logotype

Contents of /trunk/lib/WebPAC/Normalize.pm

Parent Directory Parent Directory | Revision Log Revision Log


Revision 604 - (show annotations)
Sun Jul 30 14:19:54 2006 UTC (16 years, 6 months ago) by dpavlin
File size: 21244 byte(s)
 r844@llin:  dpavlin | 2006-07-30 14:24:04 +0200
 first cut at marc_original_order

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 0.15
40
41 =cut
42
43 our $VERSION = '0.15';
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 while (@_) {
544 my $sf = shift or die "marc_compose $f needs subfield";
545 my $v = shift;
546
547 next unless (defined($v) && $v !~ /^\s*$/);
548 from_to($v, 'iso-8859-2', $marc_encoding) if ($marc_encoding);
549 warn "## ++ marc_compose($f,$sf,$v) ", dump( $m ),$/ if ($debug > 1);
550 if ($sf ne '+') {
551 push @$m, ( $sf, $v );
552 } else {
553 $m->[ $#$m ] .= $v;
554 }
555 }
556
557 warn "## marc_compose current marc = ", dump( $m ),$/ if ($debug > 1);
558
559 push @{ $marc_record->[ $marc_record_offset ] }, $m if ($#{$m} > 2);
560 }
561
562 =head2 marc_duplicate
563
564 Generate copy of current MARC record and continue working on copy
565
566 marc_duplicate();
567
568 Copies can be accessed using C<< _get_marc_fields( fetch_next => 1 ) >> or
569 C<< _get_marc_fields( offset => 42 ) >>.
570
571 =cut
572
573 sub marc_duplicate {
574 my $m = $marc_record->[ -1 ];
575 die "can't duplicate record which isn't defined" unless ($m);
576 push @{ $marc_record }, dclone( $m );
577 warn "## marc_duplicate = ", dump(@$marc_record), $/ if ($debug > 1);
578 $marc_record_offset = $#{ $marc_record };
579 warn "## marc_record_offset = $marc_record_offset", $/ if ($debug > 1);
580 }
581
582 =head2 marc_remove
583
584 Remove some field or subfield from MARC record.
585
586 marc_remove('200');
587 marc_remove('200','a');
588
589 This will erase field C<200> or C<200^a> from current MARC record.
590
591 This is useful after calling C<marc_duplicate> or on it's own (but, you
592 should probably just remove that subfield definition if you are not
593 using C<marc_duplicate>).
594
595 FIXME: support fields < 10.
596
597 =cut
598
599 sub marc_remove {
600 my ($f, $sf) = @_;
601
602 die "marc_remove needs record number" unless defined($f);
603
604 my $marc = $marc_record->[ $marc_record_offset ];
605
606 warn "### marc_remove before = ", dump( $marc ), $/ if ($debug > 2);
607
608 my $i = 0;
609 foreach ( 0 .. $#{ $marc } ) {
610 last unless (defined $marc->[$i]);
611 warn "#### working on ",dump( @{ $marc->[$i] }), $/ if ($debug > 3);
612 if ($marc->[$i]->[0] eq $f) {
613 if (! defined $sf) {
614 # remove whole field
615 splice @$marc, $i, 1;
616 warn "#### slice \@\$marc, $i, 1 = ",dump( @{ $marc }), $/ if ($debug > 3);
617 $i--;
618 } else {
619 foreach my $j ( 0 .. (( $#{ $marc->[$i] } - 3 ) / 2) ) {
620 my $o = ($j * 2) + 3;
621 if ($marc->[$i]->[$o] eq $sf) {
622 # remove subfield
623 splice @{$marc->[$i]}, $o, 2;
624 warn "#### slice \@{\$marc->[$i]}, $o, 2 = ", dump( @{ $marc }), $/ if ($debug > 3);
625 # is record now empty?
626 if ($#{ $marc->[$i] } == 2) {
627 splice @$marc, $i, 1;
628 warn "#### slice \@\$marc, $i, 1 = ", dump( @{ $marc }), $/ if ($debug > 3);
629 $i--;
630 };
631 }
632 }
633 }
634 }
635 $i++;
636 }
637
638 warn "### marc_remove($f", $sf ? ",$sf" : "", ") after = ", dump( $marc ), $/ if ($debug > 2);
639
640 $marc_record->[ $marc_record_offset ] = $marc;
641
642 warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
643 }
644
645 =head2 marc_original_order
646
647 Copy all subfields preserving original order to marc field.
648
649 marc_original_order(210, 260);
650
651 You might want to use this command if you are just renaming subfields or
652 using pre-processing modify_record in C<config.yml> and don't need any
653 post-processing or want to preserve order of original subfields.
654
655 =cut
656
657 sub marc_original_order {
658
659 my ($from, $to) = @_;
660 die "marc_original_order needs from and to fields\n" unless ($from && $to);
661
662 my $r = $rec->{$from} || return;
663 die "record field $from isn't array\n" unless (ref($r) eq 'ARRAY');
664
665 my ($i1,$i2) = defined($marc_indicators->{$to}) ? @{ $marc_indicators->{$to} } : (' ',' ');
666 warn "## marc_original_order($from,$to) source = ", dump( $r ),$/ if ($debug > 1);
667
668 foreach my $d (@$r) {
669
670 my @sfs = @{ $d->{subfields} };
671
672 die "field $from doesn't have subfields specification\n" unless(@sfs);
673 die "field $from doesn't have even number of subfields specifications\n" unless($#sfs % 2 == 1);
674
675 warn "#--> d: ",dump($d), "\n#--> sfs: ",dump(@sfs),$/;
676
677 my $m = [ $to, $i1, $i2 ];
678
679 while (my $sf = shift @sfs) {
680 warn "#--> sf: ",dump($sf), $/;
681 my $offset = shift @sfs;
682 die "corrupted sufields specification for field $from\n" unless defined($offset);
683
684 my $v;
685 if (ref($d->{$sf}) eq 'ARRAY') {
686 $v = $d->{$sf}->[$offset] if (defined($d->{$sf}->[$offset]));
687 } elsif ($offset == 0) {
688 $v = $d->{$sf};
689 } else {
690 die "field $from subfield '$sf' need occurence $offset which doesn't exist", dump($d->{$sf});
691 }
692 push @$m, ( $sf, $v ) if (defined($v));
693 }
694
695 if ($#{$m} > 2) {
696 push @{ $marc_record->[ $marc_record_offset ] }, $m;
697 }
698 }
699
700 warn "## marc_record = ", dump( $marc_record ),$/ if ($debug > 1);
701
702 warn "# marc_original_order is partly implemented";
703 }
704
705
706 =head1 Functions to extract data from input
707
708 This function should be used inside functions to create C<data_structure> described
709 above.
710
711 =head2 rec1
712
713 Return all values in some field
714
715 @v = rec1('200')
716
717 TODO: order of values is probably same as in source data, need to investigate that
718
719 =cut
720
721 sub rec1 {
722 my $f = shift;
723 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
724 return unless (defined($rec) && defined($rec->{$f}));
725 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
726 if (ref($rec->{$f}) eq 'ARRAY') {
727 return map {
728 if (ref($_) eq 'HASH') {
729 values %{$_};
730 } else {
731 $_;
732 }
733 } @{ $rec->{$f} };
734 } elsif( defined($rec->{$f}) ) {
735 return $rec->{$f};
736 }
737 }
738
739 =head2 rec2
740
741 Return all values in specific field and subfield
742
743 @v = rec2('200','a')
744
745 =cut
746
747 sub rec2 {
748 my $f = shift;
749 return unless (defined($rec && $rec->{$f}));
750 my $sf = shift;
751 warn "rec2($f,$sf) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
752 return map {
753 if (ref($_->{$sf}) eq 'ARRAY') {
754 @{ $_->{$sf} };
755 } else {
756 $_->{$sf};
757 }
758 } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} };
759 }
760
761 =head2 rec
762
763 syntaxtic sugar for
764
765 @v = rec('200')
766 @v = rec('200','a')
767
768 =cut
769
770 sub rec {
771 my @out;
772 if ($#_ == 0) {
773 @out = rec1(@_);
774 } elsif ($#_ == 1) {
775 @out = rec2(@_);
776 }
777 if (@out) {
778 return @out;
779 } else {
780 return '';
781 }
782 }
783
784 =head2 regex
785
786 Apply regex to some or all values
787
788 @v = regex( 's/foo/bar/g', @v );
789
790 =cut
791
792 sub regex {
793 my $r = shift;
794 my @out;
795 #warn "r: $r\n", dump(\@_);
796 foreach my $t (@_) {
797 next unless ($t);
798 eval "\$t =~ $r";
799 push @out, $t if ($t && $t ne '');
800 }
801 return @out;
802 }
803
804 =head2 prefix
805
806 Prefix all values with a string
807
808 @v = prefix( 'my_', @v );
809
810 =cut
811
812 sub prefix {
813 my $p = shift or return;
814 return map { $p . $_ } grep { defined($_) } @_;
815 }
816
817 =head2 suffix
818
819 suffix all values with a string
820
821 @v = suffix( '_my', @v );
822
823 =cut
824
825 sub suffix {
826 my $s = shift or die "suffix needs string as first argument";
827 return map { $_ . $s } grep { defined($_) } @_;
828 }
829
830 =head2 surround
831
832 surround all values with a two strings
833
834 @v = surround( 'prefix_', '_suffix', @v );
835
836 =cut
837
838 sub surround {
839 my $p = shift or die "surround need prefix as first argument";
840 my $s = shift or die "surround needs suffix as second argument";
841 return map { $p . $_ . $s } grep { defined($_) } @_;
842 }
843
844 =head2 first
845
846 Return first element
847
848 $v = first( @v );
849
850 =cut
851
852 sub first {
853 my $r = shift;
854 return $r;
855 }
856
857 =head2 lookup
858
859 Consult lookup hashes for some value
860
861 @v = lookup( $v );
862 @v = lookup( @v );
863
864 =cut
865
866 sub lookup {
867 my $k = shift or return;
868 return unless (defined($lookup->{$k}));
869 if (ref($lookup->{$k}) eq 'ARRAY') {
870 return @{ $lookup->{$k} };
871 } else {
872 return $lookup->{$k};
873 }
874 }
875
876 =head2 config
877
878 Consult config values stored in C<config.yml>
879
880 # return database code (key under databases in yaml)
881 $database_code = config(); # use _ from hash
882 $database_name = config('name');
883 $database_input_name = config('input name');
884 $tag = config('input normalize tag');
885
886 Up to three levels are supported.
887
888 =cut
889
890 sub config {
891 return unless ($config);
892
893 my $p = shift;
894
895 $p ||= '';
896
897 my $v;
898
899 warn "### getting config($p)\n" if ($debug > 1);
900
901 my @p = split(/\s+/,$p);
902 if ($#p < 0) {
903 $v = $config->{ '_' }; # special, database code
904 } else {
905
906 my $c = dclone( $config );
907
908 foreach my $k (@p) {
909 warn "### k: $k c = ",dump($c),$/ if ($debug > 1);
910 if (ref($c) eq 'ARRAY') {
911 $c = shift @$c;
912 warn "config($p) taking first occurence of '$k', probably not what you wanted!\n";
913 last;
914 }
915
916 if (! defined($c->{$k}) ) {
917 $c = undef;
918 last;
919 } else {
920 $c = $c->{$k};
921 }
922 }
923 $v = $c if ($c);
924
925 }
926
927 warn "## config( '$p' ) = ",dump( $v ),$/ if ($v && $debug);
928 warn "config( '$p' ) is empty\n" if (! $v);
929
930 return $v;
931 }
932
933 =head2 id
934
935 Returns unique id of this record
936
937 $id = id();
938
939 Returns C<42/2> for 2nd occurence of MFN 42.
940
941 =cut
942
943 sub id {
944 my $mfn = $config->{_mfn} || die "no _mfn in config data";
945 return $mfn . $#{$marc_record} ? $#{$marc_record} + 1 : '';
946 }
947
948 =head2 join_with
949
950 Joins walues with some delimiter
951
952 $v = join_with(", ", @v);
953
954 =cut
955
956 sub join_with {
957 my $d = shift;
958 warn "### join_with('$d',",dump(@_),")\n" if ($debug > 2);
959 my $v = join($d, grep { defined($_) && $_ ne '' } @_);
960 return '' unless defined($v);
961 return $v;
962 }
963
964 =head2 split_rec_on
965
966 Split record subfield on some regex and take one of parts out
967
968 $a_before_semi_column =
969 split_rec_on('200','a', /\s*;\s*/, $part);
970
971 C<$part> is optional number of element. First element is
972 B<1>, not 0!
973
974 If there is no C<$part> parameter or C<$part> is 0, this function will
975 return all values produced by splitting.
976
977 =cut
978
979 sub split_rec_on {
980 die "split_rec_on need (fld,sf,regex[,part]" if ($#_ < 2);
981
982 my ($fld, $sf, $regex, $part) = @_;
983 warn "### regex ", ref($regex), $regex, $/ if ($debug > 2);
984
985 my @r = rec( $fld, $sf );
986 my $v = shift @r;
987 warn "### first rec($fld,$sf) = ",dump($v),$/ if ($debug > 2);
988
989 return '' if ( ! defined($v) || $v =~ /^\s*$/);
990
991 my @s = split( $regex, $v );
992 warn "## split_rec_on($fld,$sf,$regex,$part) = ",dump(@s),$/ if ($debug > 1);
993 if ($part && $part > 0) {
994 return $s[ $part - 1 ];
995 } else {
996 return @s;
997 }
998 }
999
1000 # END
1001 1;

  ViewVC Help
Powered by ViewVC 1.1.26