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

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Revision 631 - (hide annotations)
Wed Sep 6 14:25:16 2006 UTC (16 years, 4 months ago) by dpavlin
File size: 22254 byte(s)
 r890@llin:  dpavlin | 2006-09-06 16:24:27 +0200
 rec1 now unrolls subfields in correct order (as in source file)

1 dpavlin 10 package WebPAC::Normalize;
2 dpavlin 536 use Exporter 'import';
3     @EXPORT = qw/
4 dpavlin 538 _set_rec _set_lookup
5     _get_ds _clean_ds
6 dpavlin 554 _debug
7 dpavlin 538
8 dpavlin 536 tag search display
9 dpavlin 547 marc marc_indicators marc_repeatable_subfield
10 dpavlin 564 marc_compose marc_leader
11 dpavlin 574 marc_duplicate marc_remove
12 dpavlin 604 marc_original_order
13 dpavlin 540
14 dpavlin 536 rec1 rec2 rec
15     regex prefix suffix surround
16     first lookup join_with
17 dpavlin 562
18     split_rec_on
19 dpavlin 536 /;
20 dpavlin 10
21     use warnings;
22     use strict;
23 dpavlin 536
24     #use base qw/WebPAC::Common/;
25 dpavlin 550 use Data::Dump qw/dump/;
26 dpavlin 541 use Encode qw/from_to/;
27 dpavlin 574 use Storable qw/dclone/;
28 dpavlin 10
29 dpavlin 550 # debugging warn(s)
30     my $debug = 0;
31    
32    
33 dpavlin 10 =head1 NAME
34    
35 dpavlin 536 WebPAC::Normalize - describe normalisaton rules using sets
36 dpavlin 10
37     =head1 VERSION
38    
39 dpavlin 631 Version 0.17
40 dpavlin 10
41     =cut
42    
43 dpavlin 631 our $VERSION = '0.17';
44 dpavlin 10
45     =head1 SYNOPSIS
46    
47 dpavlin 536 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 dpavlin 10
51 dpavlin 536 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 dpavlin 15
55 dpavlin 536 Normalisation can generate multiple output normalized data. For now, supported output
56 dpavlin 540 types (on the left side of definition) are: C<tag>, C<display>, C<search> and
57 dpavlin 547 C<marc>.
58 dpavlin 15
59 dpavlin 10 =head1 FUNCTIONS
60    
61 dpavlin 538 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 dpavlin 536 =head2 data_structure
65 dpavlin 10
66 dpavlin 536 Return data structure
67 dpavlin 13
68 dpavlin 538 my $ds = WebPAC::Normalize::data_structure(
69 dpavlin 536 lookup => $lookup->lookup_hash,
70     row => $row,
71     rules => $normalize_pl_config,
72 dpavlin 541 marc_encoding => 'utf-8',
73 dpavlin 595 config => $config,
74 dpavlin 13 );
75    
76 dpavlin 540 Options C<lookup>, C<row>, C<rules> and C<log> are mandatory while all
77     other are optional.
78    
79 dpavlin 536 This function will B<die> if normalizastion can't be evaled.
80 dpavlin 15
81 dpavlin 538 Since this function isn't exported you have to call it with
82     C<WebPAC::Normalize::data_structure>.
83    
84 dpavlin 10 =cut
85    
86 dpavlin 536 sub data_structure {
87     my $arg = {@_};
88 dpavlin 13
89 dpavlin 536 die "need row argument" unless ($arg->{row});
90     die "need normalisation argument" unless ($arg->{rules});
91 dpavlin 31
92 dpavlin 536 no strict 'subs';
93 dpavlin 538 _set_lookup( $arg->{lookup} );
94     _set_rec( $arg->{row} );
95 dpavlin 595 _set_config( $arg->{config} );
96 dpavlin 541 _clean_ds( %{ $arg } );
97 dpavlin 536 eval "$arg->{rules}";
98     die "error evaling $arg->{rules}: $@\n" if ($@);
99 dpavlin 540
100 dpavlin 538 return _get_ds();
101 dpavlin 10 }
102    
103 dpavlin 538 =head2 _set_rec
104 dpavlin 13
105 dpavlin 536 Set current record hash
106 dpavlin 433
107 dpavlin 538 _set_rec( $rec );
108 dpavlin 433
109     =cut
110    
111 dpavlin 536 my $rec;
112 dpavlin 433
113 dpavlin 538 sub _set_rec {
114 dpavlin 536 $rec = shift or die "no record hash";
115 dpavlin 433 }
116    
117 dpavlin 595 =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 dpavlin 538 =head2 _get_ds
146    
147     Return hash formatted as data structure
148    
149     my $ds = _get_ds();
150    
151     =cut
152    
153 dpavlin 574 my ($out, $marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators);
154     my ($marc_record_offset, $marc_fetch_offset) = (0, 0);
155 dpavlin 538
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 dpavlin 541 my $a = {@_};
170 dpavlin 550 ($out,$marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators) = ();
171 dpavlin 574 ($marc_record_offset, $marc_fetch_offset) = (0,0);
172 dpavlin 541 $marc_encoding = $a->{marc_encoding};
173 dpavlin 538 }
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 dpavlin 547 =head2 _get_marc_fields
190 dpavlin 540
191 dpavlin 547 Get all fields defined by calls to C<marc>
192 dpavlin 540
193 dpavlin 547 $marc->add_fields( WebPAC::Normalize:_get_marc_fields() );
194 dpavlin 540
195 dpavlin 543 We are using I<magic> which detect repeatable fields only from
196     sequence of field/subfield data generated by normalization.
197    
198 dpavlin 554 Repeatable field is created when there is second occurence of same subfield or
199     if any of indicators are different.
200 dpavlin 543
201 dpavlin 554 This is sane for most cases. Something like:
202 dpavlin 543
203 dpavlin 554 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 dpavlin 574 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 dpavlin 554
225 dpavlin 574 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 dpavlin 540 =cut
243    
244 dpavlin 547 sub _get_marc_fields {
245 dpavlin 550
246 dpavlin 574 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 dpavlin 550
255 dpavlin 574 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 dpavlin 550 # 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 dpavlin 572 $a->[0] . ( $a->[3] || '' ) cmp $b->[0] . ( $b->[3] || '')
269 dpavlin 574 } @{ $marc_rec };
270 dpavlin 550
271 dpavlin 574 @sorted_marc_record = @{ $marc_rec }; ### FIXME disable sorting
272 dpavlin 562
273 dpavlin 550 # output marc fields
274 dpavlin 542 my @m;
275 dpavlin 550
276     # count unique field-subfields (used for offset when walking to next subfield)
277     my $u;
278 dpavlin 572 map { $u->{ $_->[0] . ( $_->[3] || '') }++ } @sorted_marc_record;
279 dpavlin 550
280     if ($debug) {
281 dpavlin 574 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 dpavlin 550 }
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 dpavlin 542 }
298    
299 dpavlin 550 # mark it visited
300     $visited->{$i}++;
301    
302 dpavlin 574 my $row = dclone( $sorted_marc_record[$i] );
303 dpavlin 550
304     # field and subfield which is key for
305     # marc_repeatable_subfield and u
306 dpavlin 572 my $fsf = $row->[0] . ( $row->[3] || '' );
307 dpavlin 550
308     if ($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 dpavlin 542 }
354    
355 dpavlin 550 if ($#$field >= 0) {
356     push @m, $field;
357     warn "## saved/3 ", dump( $field ),$/ if ($debug);
358     }
359 dpavlin 542
360 dpavlin 579 return \@m;
361 dpavlin 540 }
362    
363 dpavlin 554 =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 dpavlin 568 warn "debug level $l",$/ if ($l > 0);
375 dpavlin 554 $debug = $l;
376     }
377    
378 dpavlin 540 =head1 Functions to create C<data_structure>
379    
380     Those functions generally have to first in your normalization file.
381    
382 dpavlin 536 =head2 tag
383 dpavlin 433
384 dpavlin 536 Define new tag for I<search> and I<display>.
385 dpavlin 433
386 dpavlin 536 tag('Title', rec('200','a') );
387 dpavlin 13
388    
389     =cut
390    
391 dpavlin 536 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 dpavlin 13
400 dpavlin 536 =head2 display
401 dpavlin 13
402 dpavlin 536 Define tag just for I<display>
403 dpavlin 125
404 dpavlin 536 @v = display('Title', rec('200','a') );
405 dpavlin 125
406 dpavlin 536 =cut
407 dpavlin 125
408 dpavlin 536 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 dpavlin 13
416 dpavlin 536 =head2 search
417 dpavlin 13
418 dpavlin 536 Prepare values just for I<search>
419 dpavlin 13
420 dpavlin 536 @v = search('Title', rec('200','a') );
421 dpavlin 433
422 dpavlin 536 =cut
423 dpavlin 13
424 dpavlin 536 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 dpavlin 13 }
431    
432 dpavlin 564 =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 dpavlin 547 =head2 marc
452 dpavlin 540
453     Save value for MARC field
454    
455 dpavlin 547 marc('900','a', rec('200','a') );
456 dpavlin 571 marc('001', rec('000') );
457 dpavlin 540
458     =cut
459    
460 dpavlin 547 sub marc {
461     my $f = shift or die "marc needs field";
462     die "marc field must be numer" unless ($f =~ /^\d+$/);
463 dpavlin 540
464 dpavlin 571 my $sf;
465     if ($f >= 10) {
466     $sf = shift or die "marc needs subfield";
467     }
468 dpavlin 540
469 dpavlin 541 foreach (@_) {
470     my $v = $_; # make var read-write for Encode
471 dpavlin 543 next unless (defined($v) && $v !~ /^\s*$/);
472 dpavlin 541 from_to($v, 'iso-8859-2', $marc_encoding) if ($marc_encoding);
473 dpavlin 548 my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
474 dpavlin 571 if (defined $sf) {
475 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $i1, $i2, $sf => $v ];
476 dpavlin 571 } else {
477 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $v ];
478 dpavlin 571 }
479 dpavlin 540 }
480     }
481    
482 dpavlin 547 =head2 marc_repeatable_subfield
483    
484     Save values for MARC repetable subfield
485    
486     marc_repeatable_subfield('910', 'z', rec('909') );
487    
488     =cut
489    
490     sub marc_repeatable_subfield {
491 dpavlin 550 my ($f,$sf) = @_;
492     die "marc_repeatable_subfield need field and subfield!\n" unless ($f && $sf);
493     $marc_repeatable_subfield->{ $f . $sf }++;
494 dpavlin 547 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 dpavlin 548 @{ $marc_indicators->{$f} } = ($i1,$i2);
516 dpavlin 547 }
517    
518 dpavlin 562 =head2 marc_compose
519 dpavlin 547
520 dpavlin 562 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 dpavlin 603 If you specify C<+> for subfield, value will be appended
530     to previous defined subfield.
531    
532 dpavlin 562 =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, $i2 ];
540    
541 dpavlin 583 warn "### marc_compose input subfields = ", dump(@_),$/ if ($debug > 2);
542    
543 dpavlin 619 if ($#_ % 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 dpavlin 562 while (@_) {
548 dpavlin 619 my $sf = shift;
549 dpavlin 565 my $v = shift;
550 dpavlin 562
551     next unless (defined($v) && $v !~ /^\s*$/);
552     from_to($v, 'iso-8859-2', $marc_encoding) if ($marc_encoding);
553 dpavlin 568 warn "## ++ marc_compose($f,$sf,$v) ", dump( $m ),$/ if ($debug > 1);
554 dpavlin 603 if ($sf ne '+') {
555     push @$m, ( $sf, $v );
556     } else {
557     $m->[ $#$m ] .= $v;
558     }
559 dpavlin 562 }
560    
561 dpavlin 586 warn "## marc_compose current marc = ", dump( $m ),$/ if ($debug > 1);
562 dpavlin 562
563 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, $m if ($#{$m} > 2);
564 dpavlin 562 }
565    
566 dpavlin 574 =head2 marc_duplicate
567 dpavlin 562
568 dpavlin 574 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 dpavlin 579 my $i = 0;
613     foreach ( 0 .. $#{ $marc } ) {
614 dpavlin 574 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 dpavlin 579 $i++;
640 dpavlin 574 }
641    
642     warn "### marc_remove($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 dpavlin 604 =head2 marc_original_order
650    
651     Copy all subfields preserving original order to marc field.
652    
653 dpavlin 616 marc_original_order( marc_field_number, original_input_field_number );
654 dpavlin 604
655 dpavlin 616 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 dpavlin 604 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 dpavlin 616
664 dpavlin 604 =cut
665    
666     sub marc_original_order {
667    
668 dpavlin 616 my ($to, $from) = @_;
669 dpavlin 604 die "marc_original_order needs from and to fields\n" unless ($from && $to);
670    
671 dpavlin 616 return unless defined($rec->{$from});
672    
673     my $r = $rec->{$from};
674 dpavlin 604 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 dpavlin 616 warn "## marc_original_order($to,$from) source = ", dump( $r ),$/ if ($debug > 1);
678 dpavlin 604
679     foreach my $d (@$r) {
680    
681 dpavlin 605 if (! defined($d->{subfields}) && ref($d->{subfields}) ne 'ARRAY') {
682 dpavlin 616 warn "# marc_original_order($to,$from): field $from doesn't have subfields specification\n";
683 dpavlin 605 next;
684     }
685    
686 dpavlin 604 my @sfs = @{ $d->{subfields} };
687    
688     die "field $from doesn't have even number of subfields specifications\n" unless($#sfs % 2 == 1);
689    
690 dpavlin 618 warn "#--> d: ",dump($d), "\n#--> sfs: ",dump(@sfs),$/ if ($debug > 2);
691 dpavlin 604
692     my $m = [ $to, $i1, $i2 ];
693    
694     while (my $sf = shift @sfs) {
695 dpavlin 618
696     warn "#--> sf: ",dump($sf), $/ if ($debug > 2);
697 dpavlin 604 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 dpavlin 540 =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 dpavlin 536 =head2 rec1
726 dpavlin 371
727 dpavlin 536 Return all values in some field
728 dpavlin 371
729 dpavlin 536 @v = rec1('200')
730 dpavlin 15
731 dpavlin 536 TODO: order of values is probably same as in source data, need to investigate that
732 dpavlin 15
733 dpavlin 536 =cut
734 dpavlin 15
735 dpavlin 536 sub rec1 {
736     my $f = shift;
737 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
738 dpavlin 536 return unless (defined($rec) && defined($rec->{$f}));
739 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
740 dpavlin 536 if (ref($rec->{$f}) eq 'ARRAY') {
741     return map {
742     if (ref($_) eq 'HASH') {
743 dpavlin 631 my $h = $_;
744     if ( defined($h->{subfields}) ) {
745     my $sfs = delete $h->{subfields} || die "no subfields?";
746     my @out;
747     while (@$sfs) {
748     my $sf = shift @$sfs;
749     my $o = shift @$sfs;
750     if ($o == 0 && ref( $h->{$sf} ) ne 'ARRAY' ) {
751     # single element subfields are not arrays
752     push @out, $h->{$sf};
753     } else {
754     warn "====> $f $sf $o $#$sfs ", dump( $sfs ), "\n";
755     push @out, $h->{$sf}->[$o];
756     }
757     }
758     return @out;
759     } else {
760     # FIXME this should probably be in alphabetical order instead of hash order
761     values %{$h};
762     }
763 dpavlin 31 } else {
764 dpavlin 536 $_;
765 dpavlin 31 }
766 dpavlin 536 } @{ $rec->{$f} };
767     } elsif( defined($rec->{$f}) ) {
768     return $rec->{$f};
769 dpavlin 15 }
770     }
771    
772 dpavlin 536 =head2 rec2
773 dpavlin 15
774 dpavlin 536 Return all values in specific field and subfield
775 dpavlin 13
776 dpavlin 536 @v = rec2('200','a')
777 dpavlin 13
778     =cut
779    
780 dpavlin 536 sub rec2 {
781     my $f = shift;
782     return unless (defined($rec && $rec->{$f}));
783     my $sf = shift;
784 dpavlin 601 warn "rec2($f,$sf) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
785 dpavlin 589 return map {
786     if (ref($_->{$sf}) eq 'ARRAY') {
787     @{ $_->{$sf} };
788     } else {
789     $_->{$sf};
790     }
791     } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} };
792 dpavlin 536 }
793 dpavlin 13
794 dpavlin 536 =head2 rec
795 dpavlin 13
796 dpavlin 536 syntaxtic sugar for
797 dpavlin 13
798 dpavlin 536 @v = rec('200')
799     @v = rec('200','a')
800 dpavlin 13
801 dpavlin 536 =cut
802 dpavlin 373
803 dpavlin 536 sub rec {
804 dpavlin 583 my @out;
805 dpavlin 536 if ($#_ == 0) {
806 dpavlin 583 @out = rec1(@_);
807 dpavlin 536 } elsif ($#_ == 1) {
808 dpavlin 583 @out = rec2(@_);
809 dpavlin 13 }
810 dpavlin 583 if (@out) {
811     return @out;
812     } else {
813     return '';
814     }
815 dpavlin 13 }
816    
817 dpavlin 536 =head2 regex
818 dpavlin 15
819 dpavlin 536 Apply regex to some or all values
820 dpavlin 15
821 dpavlin 536 @v = regex( 's/foo/bar/g', @v );
822 dpavlin 15
823     =cut
824    
825 dpavlin 536 sub regex {
826     my $r = shift;
827     my @out;
828 dpavlin 550 #warn "r: $r\n", dump(\@_);
829 dpavlin 536 foreach my $t (@_) {
830     next unless ($t);
831     eval "\$t =~ $r";
832     push @out, $t if ($t && $t ne '');
833 dpavlin 368 }
834 dpavlin 536 return @out;
835 dpavlin 15 }
836    
837 dpavlin 536 =head2 prefix
838 dpavlin 15
839 dpavlin 536 Prefix all values with a string
840 dpavlin 15
841 dpavlin 536 @v = prefix( 'my_', @v );
842 dpavlin 15
843     =cut
844    
845 dpavlin 536 sub prefix {
846 dpavlin 592 my $p = shift or return;
847 dpavlin 536 return map { $p . $_ } grep { defined($_) } @_;
848     }
849 dpavlin 15
850 dpavlin 536 =head2 suffix
851 dpavlin 15
852 dpavlin 536 suffix all values with a string
853 dpavlin 15
854 dpavlin 536 @v = suffix( '_my', @v );
855 dpavlin 15
856 dpavlin 536 =cut
857 dpavlin 15
858 dpavlin 536 sub suffix {
859     my $s = shift or die "suffix needs string as first argument";
860     return map { $_ . $s } grep { defined($_) } @_;
861 dpavlin 15 }
862    
863 dpavlin 536 =head2 surround
864 dpavlin 13
865 dpavlin 536 surround all values with a two strings
866 dpavlin 13
867 dpavlin 536 @v = surround( 'prefix_', '_suffix', @v );
868 dpavlin 13
869     =cut
870    
871 dpavlin 536 sub surround {
872     my $p = shift or die "surround need prefix as first argument";
873     my $s = shift or die "surround needs suffix as second argument";
874     return map { $p . $_ . $s } grep { defined($_) } @_;
875 dpavlin 13 }
876    
877 dpavlin 536 =head2 first
878 dpavlin 13
879 dpavlin 536 Return first element
880 dpavlin 15
881 dpavlin 536 $v = first( @v );
882 dpavlin 13
883     =cut
884    
885 dpavlin 536 sub first {
886     my $r = shift;
887     return $r;
888 dpavlin 13 }
889    
890 dpavlin 536 =head2 lookup
891 dpavlin 13
892 dpavlin 536 Consult lookup hashes for some value
893 dpavlin 13
894 dpavlin 536 @v = lookup( $v );
895     @v = lookup( @v );
896 dpavlin 13
897     =cut
898    
899 dpavlin 536 sub lookup {
900     my $k = shift or return;
901     return unless (defined($lookup->{$k}));
902     if (ref($lookup->{$k}) eq 'ARRAY') {
903     return @{ $lookup->{$k} };
904     } else {
905     return $lookup->{$k};
906     }
907 dpavlin 13 }
908    
909 dpavlin 595 =head2 config
910    
911     Consult config values stored in C<config.yml>
912    
913     # return database code (key under databases in yaml)
914     $database_code = config(); # use _ from hash
915     $database_name = config('name');
916     $database_input_name = config('input name');
917     $tag = config('input normalize tag');
918    
919     Up to three levels are supported.
920    
921     =cut
922    
923     sub config {
924     return unless ($config);
925    
926     my $p = shift;
927    
928     $p ||= '';
929    
930     my $v;
931    
932     warn "### getting config($p)\n" if ($debug > 1);
933    
934     my @p = split(/\s+/,$p);
935     if ($#p < 0) {
936     $v = $config->{ '_' }; # special, database code
937     } else {
938    
939     my $c = dclone( $config );
940    
941     foreach my $k (@p) {
942     warn "### k: $k c = ",dump($c),$/ if ($debug > 1);
943     if (ref($c) eq 'ARRAY') {
944     $c = shift @$c;
945     warn "config($p) taking first occurence of '$k', probably not what you wanted!\n";
946     last;
947     }
948    
949     if (! defined($c->{$k}) ) {
950     $c = undef;
951     last;
952     } else {
953     $c = $c->{$k};
954     }
955     }
956     $v = $c if ($c);
957    
958     }
959    
960     warn "## config( '$p' ) = ",dump( $v ),$/ if ($v && $debug);
961     warn "config( '$p' ) is empty\n" if (! $v);
962    
963     return $v;
964     }
965    
966     =head2 id
967    
968     Returns unique id of this record
969    
970     $id = id();
971    
972     Returns C<42/2> for 2nd occurence of MFN 42.
973    
974     =cut
975    
976     sub id {
977     my $mfn = $config->{_mfn} || die "no _mfn in config data";
978     return $mfn . $#{$marc_record} ? $#{$marc_record} + 1 : '';
979     }
980    
981 dpavlin 536 =head2 join_with
982 dpavlin 13
983 dpavlin 536 Joins walues with some delimiter
984 dpavlin 10
985 dpavlin 536 $v = join_with(", ", @v);
986 dpavlin 10
987 dpavlin 536 =cut
988 dpavlin 10
989 dpavlin 536 sub join_with {
990     my $d = shift;
991 dpavlin 586 warn "### join_with('$d',",dump(@_),")\n" if ($debug > 2);
992 dpavlin 583 my $v = join($d, grep { defined($_) && $_ ne '' } @_);
993     return '' unless defined($v);
994     return $v;
995 dpavlin 536 }
996 dpavlin 10
997 dpavlin 562 =head2 split_rec_on
998    
999     Split record subfield on some regex and take one of parts out
1000    
1001     $a_before_semi_column =
1002     split_rec_on('200','a', /\s*;\s*/, $part);
1003    
1004     C<$part> is optional number of element. First element is
1005     B<1>, not 0!
1006    
1007     If there is no C<$part> parameter or C<$part> is 0, this function will
1008     return all values produced by splitting.
1009    
1010     =cut
1011    
1012     sub split_rec_on {
1013     die "split_rec_on need (fld,sf,regex[,part]" if ($#_ < 2);
1014    
1015     my ($fld, $sf, $regex, $part) = @_;
1016 dpavlin 568 warn "### regex ", ref($regex), $regex, $/ if ($debug > 2);
1017 dpavlin 562
1018     my @r = rec( $fld, $sf );
1019     my $v = shift @r;
1020 dpavlin 568 warn "### first rec($fld,$sf) = ",dump($v),$/ if ($debug > 2);
1021 dpavlin 562
1022 dpavlin 604 return '' if ( ! defined($v) || $v =~ /^\s*$/);
1023 dpavlin 566
1024 dpavlin 562 my @s = split( $regex, $v );
1025 dpavlin 568 warn "## split_rec_on($fld,$sf,$regex,$part) = ",dump(@s),$/ if ($debug > 1);
1026 dpavlin 566 if ($part && $part > 0) {
1027 dpavlin 562 return $s[ $part - 1 ];
1028     } else {
1029 dpavlin 571 return @s;
1030 dpavlin 562 }
1031     }
1032    
1033 dpavlin 536 # END
1034     1;

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