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

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Revision 616 - (hide annotations)
Wed Aug 23 14:29:43 2006 UTC (16 years, 5 months ago) by dpavlin
File size: 21580 byte(s)
marc_original_order has now arguments in order marc_field, original_field to
be consistent with other directives

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 616 Version 0.16
40 dpavlin 10
41     =cut
42    
43 dpavlin 616 our $VERSION = '0.16';
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 562 while (@_) {
544     my $sf = shift or die "marc_compose $f needs subfield";
545 dpavlin 565 my $v = shift;
546 dpavlin 562
547     next unless (defined($v) && $v !~ /^\s*$/);
548     from_to($v, 'iso-8859-2', $marc_encoding) if ($marc_encoding);
549 dpavlin 568 warn "## ++ marc_compose($f,$sf,$v) ", dump( $m ),$/ if ($debug > 1);
550 dpavlin 603 if ($sf ne '+') {
551     push @$m, ( $sf, $v );
552     } else {
553     $m->[ $#$m ] .= $v;
554     }
555 dpavlin 562 }
556    
557 dpavlin 586 warn "## marc_compose current marc = ", dump( $m ),$/ if ($debug > 1);
558 dpavlin 562
559 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, $m if ($#{$m} > 2);
560 dpavlin 562 }
561    
562 dpavlin 574 =head2 marc_duplicate
563 dpavlin 562
564 dpavlin 574 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 dpavlin 579 my $i = 0;
609     foreach ( 0 .. $#{ $marc } ) {
610 dpavlin 574 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 dpavlin 579 $i++;
636 dpavlin 574 }
637    
638     warn "### marc_remove($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 dpavlin 604 =head2 marc_original_order
646    
647     Copy all subfields preserving original order to marc field.
648    
649 dpavlin 616 marc_original_order( marc_field_number, original_input_field_number );
650 dpavlin 604
651 dpavlin 616 Please note that field numbers are consistent with other commands (marc
652     field number first), but somewhat counter-intuitive (destination and then
653     source).
654    
655 dpavlin 604 You might want to use this command if you are just renaming subfields or
656     using pre-processing modify_record in C<config.yml> and don't need any
657     post-processing or want to preserve order of original subfields.
658    
659 dpavlin 616
660 dpavlin 604 =cut
661    
662     sub marc_original_order {
663    
664 dpavlin 616 my ($to, $from) = @_;
665 dpavlin 604 die "marc_original_order needs from and to fields\n" unless ($from && $to);
666    
667 dpavlin 616 return unless defined($rec->{$from});
668    
669     my $r = $rec->{$from};
670 dpavlin 604 die "record field $from isn't array\n" unless (ref($r) eq 'ARRAY');
671    
672     my ($i1,$i2) = defined($marc_indicators->{$to}) ? @{ $marc_indicators->{$to} } : (' ',' ');
673 dpavlin 616 warn "## marc_original_order($to,$from) source = ", dump( $r ),$/ if ($debug > 1);
674 dpavlin 604
675     foreach my $d (@$r) {
676    
677 dpavlin 605 if (! defined($d->{subfields}) && ref($d->{subfields}) ne 'ARRAY') {
678 dpavlin 616 warn "# marc_original_order($to,$from): field $from doesn't have subfields specification\n";
679 dpavlin 605 next;
680     }
681    
682 dpavlin 604 my @sfs = @{ $d->{subfields} };
683    
684     die "field $from doesn't have even number of subfields specifications\n" unless($#sfs % 2 == 1);
685    
686     warn "#--> d: ",dump($d), "\n#--> sfs: ",dump(@sfs),$/;
687    
688     my $m = [ $to, $i1, $i2 ];
689    
690     while (my $sf = shift @sfs) {
691     warn "#--> sf: ",dump($sf), $/;
692     my $offset = shift @sfs;
693     die "corrupted sufields specification for field $from\n" unless defined($offset);
694    
695     my $v;
696     if (ref($d->{$sf}) eq 'ARRAY') {
697     $v = $d->{$sf}->[$offset] if (defined($d->{$sf}->[$offset]));
698     } elsif ($offset == 0) {
699     $v = $d->{$sf};
700     } else {
701     die "field $from subfield '$sf' need occurence $offset which doesn't exist", dump($d->{$sf});
702     }
703     push @$m, ( $sf, $v ) if (defined($v));
704     }
705    
706     if ($#{$m} > 2) {
707     push @{ $marc_record->[ $marc_record_offset ] }, $m;
708     }
709     }
710    
711     warn "## marc_record = ", dump( $marc_record ),$/ if ($debug > 1);
712    
713     warn "# marc_original_order is partly implemented";
714     }
715    
716    
717 dpavlin 540 =head1 Functions to extract data from input
718    
719     This function should be used inside functions to create C<data_structure> described
720     above.
721    
722 dpavlin 536 =head2 rec1
723 dpavlin 371
724 dpavlin 536 Return all values in some field
725 dpavlin 371
726 dpavlin 536 @v = rec1('200')
727 dpavlin 15
728 dpavlin 536 TODO: order of values is probably same as in source data, need to investigate that
729 dpavlin 15
730 dpavlin 536 =cut
731 dpavlin 15
732 dpavlin 536 sub rec1 {
733     my $f = shift;
734 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
735 dpavlin 536 return unless (defined($rec) && defined($rec->{$f}));
736 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
737 dpavlin 536 if (ref($rec->{$f}) eq 'ARRAY') {
738     return map {
739     if (ref($_) eq 'HASH') {
740     values %{$_};
741 dpavlin 31 } else {
742 dpavlin 536 $_;
743 dpavlin 31 }
744 dpavlin 536 } @{ $rec->{$f} };
745     } elsif( defined($rec->{$f}) ) {
746     return $rec->{$f};
747 dpavlin 15 }
748     }
749    
750 dpavlin 536 =head2 rec2
751 dpavlin 15
752 dpavlin 536 Return all values in specific field and subfield
753 dpavlin 13
754 dpavlin 536 @v = rec2('200','a')
755 dpavlin 13
756     =cut
757    
758 dpavlin 536 sub rec2 {
759     my $f = shift;
760     return unless (defined($rec && $rec->{$f}));
761     my $sf = shift;
762 dpavlin 601 warn "rec2($f,$sf) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
763 dpavlin 589 return map {
764     if (ref($_->{$sf}) eq 'ARRAY') {
765     @{ $_->{$sf} };
766     } else {
767     $_->{$sf};
768     }
769     } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} };
770 dpavlin 536 }
771 dpavlin 13
772 dpavlin 536 =head2 rec
773 dpavlin 13
774 dpavlin 536 syntaxtic sugar for
775 dpavlin 13
776 dpavlin 536 @v = rec('200')
777     @v = rec('200','a')
778 dpavlin 13
779 dpavlin 536 =cut
780 dpavlin 373
781 dpavlin 536 sub rec {
782 dpavlin 583 my @out;
783 dpavlin 536 if ($#_ == 0) {
784 dpavlin 583 @out = rec1(@_);
785 dpavlin 536 } elsif ($#_ == 1) {
786 dpavlin 583 @out = rec2(@_);
787 dpavlin 13 }
788 dpavlin 583 if (@out) {
789     return @out;
790     } else {
791     return '';
792     }
793 dpavlin 13 }
794    
795 dpavlin 536 =head2 regex
796 dpavlin 15
797 dpavlin 536 Apply regex to some or all values
798 dpavlin 15
799 dpavlin 536 @v = regex( 's/foo/bar/g', @v );
800 dpavlin 15
801     =cut
802    
803 dpavlin 536 sub regex {
804     my $r = shift;
805     my @out;
806 dpavlin 550 #warn "r: $r\n", dump(\@_);
807 dpavlin 536 foreach my $t (@_) {
808     next unless ($t);
809     eval "\$t =~ $r";
810     push @out, $t if ($t && $t ne '');
811 dpavlin 368 }
812 dpavlin 536 return @out;
813 dpavlin 15 }
814    
815 dpavlin 536 =head2 prefix
816 dpavlin 15
817 dpavlin 536 Prefix all values with a string
818 dpavlin 15
819 dpavlin 536 @v = prefix( 'my_', @v );
820 dpavlin 15
821     =cut
822    
823 dpavlin 536 sub prefix {
824 dpavlin 592 my $p = shift or return;
825 dpavlin 536 return map { $p . $_ } grep { defined($_) } @_;
826     }
827 dpavlin 15
828 dpavlin 536 =head2 suffix
829 dpavlin 15
830 dpavlin 536 suffix all values with a string
831 dpavlin 15
832 dpavlin 536 @v = suffix( '_my', @v );
833 dpavlin 15
834 dpavlin 536 =cut
835 dpavlin 15
836 dpavlin 536 sub suffix {
837     my $s = shift or die "suffix needs string as first argument";
838     return map { $_ . $s } grep { defined($_) } @_;
839 dpavlin 15 }
840    
841 dpavlin 536 =head2 surround
842 dpavlin 13
843 dpavlin 536 surround all values with a two strings
844 dpavlin 13
845 dpavlin 536 @v = surround( 'prefix_', '_suffix', @v );
846 dpavlin 13
847     =cut
848    
849 dpavlin 536 sub surround {
850     my $p = shift or die "surround need prefix as first argument";
851     my $s = shift or die "surround needs suffix as second argument";
852     return map { $p . $_ . $s } grep { defined($_) } @_;
853 dpavlin 13 }
854    
855 dpavlin 536 =head2 first
856 dpavlin 13
857 dpavlin 536 Return first element
858 dpavlin 15
859 dpavlin 536 $v = first( @v );
860 dpavlin 13
861     =cut
862    
863 dpavlin 536 sub first {
864     my $r = shift;
865     return $r;
866 dpavlin 13 }
867    
868 dpavlin 536 =head2 lookup
869 dpavlin 13
870 dpavlin 536 Consult lookup hashes for some value
871 dpavlin 13
872 dpavlin 536 @v = lookup( $v );
873     @v = lookup( @v );
874 dpavlin 13
875     =cut
876    
877 dpavlin 536 sub lookup {
878     my $k = shift or return;
879     return unless (defined($lookup->{$k}));
880     if (ref($lookup->{$k}) eq 'ARRAY') {
881     return @{ $lookup->{$k} };
882     } else {
883     return $lookup->{$k};
884     }
885 dpavlin 13 }
886    
887 dpavlin 595 =head2 config
888    
889     Consult config values stored in C<config.yml>
890    
891     # return database code (key under databases in yaml)
892     $database_code = config(); # use _ from hash
893     $database_name = config('name');
894     $database_input_name = config('input name');
895     $tag = config('input normalize tag');
896    
897     Up to three levels are supported.
898    
899     =cut
900    
901     sub config {
902     return unless ($config);
903    
904     my $p = shift;
905    
906     $p ||= '';
907    
908     my $v;
909    
910     warn "### getting config($p)\n" if ($debug > 1);
911    
912     my @p = split(/\s+/,$p);
913     if ($#p < 0) {
914     $v = $config->{ '_' }; # special, database code
915     } else {
916    
917     my $c = dclone( $config );
918    
919     foreach my $k (@p) {
920     warn "### k: $k c = ",dump($c),$/ if ($debug > 1);
921     if (ref($c) eq 'ARRAY') {
922     $c = shift @$c;
923     warn "config($p) taking first occurence of '$k', probably not what you wanted!\n";
924     last;
925     }
926    
927     if (! defined($c->{$k}) ) {
928     $c = undef;
929     last;
930     } else {
931     $c = $c->{$k};
932     }
933     }
934     $v = $c if ($c);
935    
936     }
937    
938     warn "## config( '$p' ) = ",dump( $v ),$/ if ($v && $debug);
939     warn "config( '$p' ) is empty\n" if (! $v);
940    
941     return $v;
942     }
943    
944     =head2 id
945    
946     Returns unique id of this record
947    
948     $id = id();
949    
950     Returns C<42/2> for 2nd occurence of MFN 42.
951    
952     =cut
953    
954     sub id {
955     my $mfn = $config->{_mfn} || die "no _mfn in config data";
956     return $mfn . $#{$marc_record} ? $#{$marc_record} + 1 : '';
957     }
958    
959 dpavlin 536 =head2 join_with
960 dpavlin 13
961 dpavlin 536 Joins walues with some delimiter
962 dpavlin 10
963 dpavlin 536 $v = join_with(", ", @v);
964 dpavlin 10
965 dpavlin 536 =cut
966 dpavlin 10
967 dpavlin 536 sub join_with {
968     my $d = shift;
969 dpavlin 586 warn "### join_with('$d',",dump(@_),")\n" if ($debug > 2);
970 dpavlin 583 my $v = join($d, grep { defined($_) && $_ ne '' } @_);
971     return '' unless defined($v);
972     return $v;
973 dpavlin 536 }
974 dpavlin 10
975 dpavlin 562 =head2 split_rec_on
976    
977     Split record subfield on some regex and take one of parts out
978    
979     $a_before_semi_column =
980     split_rec_on('200','a', /\s*;\s*/, $part);
981    
982     C<$part> is optional number of element. First element is
983     B<1>, not 0!
984    
985     If there is no C<$part> parameter or C<$part> is 0, this function will
986     return all values produced by splitting.
987    
988     =cut
989    
990     sub split_rec_on {
991     die "split_rec_on need (fld,sf,regex[,part]" if ($#_ < 2);
992    
993     my ($fld, $sf, $regex, $part) = @_;
994 dpavlin 568 warn "### regex ", ref($regex), $regex, $/ if ($debug > 2);
995 dpavlin 562
996     my @r = rec( $fld, $sf );
997     my $v = shift @r;
998 dpavlin 568 warn "### first rec($fld,$sf) = ",dump($v),$/ if ($debug > 2);
999 dpavlin 562
1000 dpavlin 604 return '' if ( ! defined($v) || $v =~ /^\s*$/);
1001 dpavlin 566
1002 dpavlin 562 my @s = split( $regex, $v );
1003 dpavlin 568 warn "## split_rec_on($fld,$sf,$regex,$part) = ",dump(@s),$/ if ($debug > 1);
1004 dpavlin 566 if ($part && $part > 0) {
1005 dpavlin 562 return $s[ $part - 1 ];
1006     } else {
1007 dpavlin 571 return @s;
1008 dpavlin 562 }
1009     }
1010    
1011 dpavlin 536 # END
1012     1;

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