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

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Revision 1015 - (hide annotations)
Thu Nov 8 17:19:50 2007 UTC (15 years, 2 months ago) by dpavlin
File size: 35820 byte(s)
 r1571@llin:  dpavlin | 2007-11-08 18:19:49 +0100
 added frec_eq and frec_ne to work-around our parser which removes spaces

1 dpavlin 10 package WebPAC::Normalize;
2 dpavlin 536 use Exporter 'import';
3 dpavlin 980 our @EXPORT = qw/
4 dpavlin 983 _set_ds _set_lookup
5 dpavlin 736 _set_load_row
6 dpavlin 538 _get_ds _clean_ds
7 dpavlin 554 _debug
8 dpavlin 641 _pack_subfields_hash
9 dpavlin 538
10 dpavlin 923 search_display search display sorted
11 dpavlin 912
12 dpavlin 547 marc marc_indicators marc_repeatable_subfield
13 dpavlin 815 marc_compose marc_leader marc_fixed
14 dpavlin 813 marc_duplicate marc_remove marc_count
15 dpavlin 604 marc_original_order
16 dpavlin 1013 marc_template
17 dpavlin 540
18 dpavlin 536 rec1 rec2 rec
19 dpavlin 1015 frec frec_eq frec_ne
20 dpavlin 536 regex prefix suffix surround
21     first lookup join_with
22 dpavlin 707 save_into_lookup
23 dpavlin 562
24     split_rec_on
25 dpavlin 785
26     get set
27 dpavlin 791 count
28 dpavlin 980
29 dpavlin 536 /;
30 dpavlin 10
31     use warnings;
32     use strict;
33 dpavlin 536
34     #use base qw/WebPAC::Common/;
35 dpavlin 550 use Data::Dump qw/dump/;
36 dpavlin 574 use Storable qw/dclone/;
37 dpavlin 725 use Carp qw/confess/;
38 dpavlin 10
39 dpavlin 550 # debugging warn(s)
40     my $debug = 0;
41    
42 dpavlin 980 use WebPAC::Normalize::ISBN;
43     push @EXPORT, ( 'isbn_10', 'isbn_13' );
44 dpavlin 550
45 dpavlin 10 =head1 NAME
46    
47 dpavlin 536 WebPAC::Normalize - describe normalisaton rules using sets
48 dpavlin 10
49     =cut
50    
51 dpavlin 1015 our $VERSION = '0.34';
52 dpavlin 10
53     =head1 SYNOPSIS
54    
55 dpavlin 536 This module uses C<conf/normalize/*.pl> files to perform normalisation
56     from input records using perl functions which are specialized for set
57     processing.
58 dpavlin 10
59 dpavlin 536 Sets are implemented as arrays, and normalisation file is valid perl, which
60     means that you check it's validity before running WebPAC using
61     C<perl -c normalize.pl>.
62 dpavlin 15
63 dpavlin 536 Normalisation can generate multiple output normalized data. For now, supported output
64 dpavlin 912 types (on the left side of definition) are: C<search_display>, C<display>, C<search> and
65 dpavlin 547 C<marc>.
66 dpavlin 15
67 dpavlin 10 =head1 FUNCTIONS
68    
69 dpavlin 538 Functions which start with C<_> are private and used by WebPAC internally.
70     All other functions are available for use within normalisation rules.
71    
72 dpavlin 536 =head2 data_structure
73 dpavlin 10
74 dpavlin 536 Return data structure
75 dpavlin 13
76 dpavlin 538 my $ds = WebPAC::Normalize::data_structure(
77 dpavlin 725 lookup => $lookup_hash,
78 dpavlin 536 row => $row,
79     rules => $normalize_pl_config,
80 dpavlin 541 marc_encoding => 'utf-8',
81 dpavlin 595 config => $config,
82 dpavlin 736 load_row_coderef => sub {
83 dpavlin 979 my ($database,$input,$mfn) = @_;
84 dpavlin 736 $store->load_row( database => $database, input => $input, id => $mfn );
85 dpavlin 725 },
86 dpavlin 13 );
87    
88 dpavlin 707 Options C<row>, C<rules> and C<log> are mandatory while all
89 dpavlin 540 other are optional.
90    
91 dpavlin 736 C<load_row_coderef> is closure only used when executing lookups, so they will
92 dpavlin 725 die if it's not defined.
93    
94 dpavlin 536 This function will B<die> if normalizastion can't be evaled.
95 dpavlin 15
96 dpavlin 538 Since this function isn't exported you have to call it with
97     C<WebPAC::Normalize::data_structure>.
98    
99 dpavlin 10 =cut
100    
101 dpavlin 736 my $load_row_coderef;
102 dpavlin 725
103 dpavlin 536 sub data_structure {
104     my $arg = {@_};
105 dpavlin 13
106 dpavlin 536 die "need row argument" unless ($arg->{row});
107     die "need normalisation argument" unless ($arg->{rules});
108 dpavlin 31
109 dpavlin 730 _set_lookup( $arg->{lookup} ) if defined($arg->{lookup});
110 dpavlin 983 _set_ds( $arg->{row} );
111 dpavlin 730 _set_config( $arg->{config} ) if defined($arg->{config});
112 dpavlin 541 _clean_ds( %{ $arg } );
113 dpavlin 736 $load_row_coderef = $arg->{load_row_coderef};
114 dpavlin 725
115 dpavlin 1011 no strict 'subs';
116     no warnings 'redefine';
117     eval "$arg->{rules};";
118 dpavlin 536 die "error evaling $arg->{rules}: $@\n" if ($@);
119 dpavlin 540
120 dpavlin 538 return _get_ds();
121 dpavlin 10 }
122    
123 dpavlin 983 =head2 _set_ds
124 dpavlin 13
125 dpavlin 536 Set current record hash
126 dpavlin 433
127 dpavlin 983 _set_ds( $rec );
128 dpavlin 433
129     =cut
130    
131 dpavlin 536 my $rec;
132 dpavlin 433
133 dpavlin 983 sub _set_ds {
134 dpavlin 536 $rec = shift or die "no record hash";
135 dpavlin 433 }
136    
137 dpavlin 595 =head2 _set_config
138    
139     Set current config hash
140    
141     _set_config( $config );
142    
143     Magic keys are:
144    
145     =over 4
146    
147     =item _
148    
149     Code of current database
150    
151     =item _mfn
152    
153     Current MFN
154    
155     =back
156    
157     =cut
158    
159     my $config;
160    
161     sub _set_config {
162     $config = shift;
163     }
164    
165 dpavlin 538 =head2 _get_ds
166    
167     Return hash formatted as data structure
168    
169     my $ds = _get_ds();
170    
171     =cut
172    
173 dpavlin 812 my ($out, $marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators, $marc_leader);
174 dpavlin 574 my ($marc_record_offset, $marc_fetch_offset) = (0, 0);
175 dpavlin 538
176     sub _get_ds {
177 dpavlin 982 #warn "## out = ",dump($out);
178 dpavlin 538 return $out;
179     }
180    
181     =head2 _clean_ds
182    
183     Clean data structure hash for next record
184    
185     _clean_ds();
186    
187     =cut
188    
189     sub _clean_ds {
190 dpavlin 541 my $a = {@_};
191 dpavlin 812 ($out,$marc_record, $marc_encoding, $marc_repeatable_subfield, $marc_indicators, $marc_leader) = ();
192 dpavlin 574 ($marc_record_offset, $marc_fetch_offset) = (0,0);
193 dpavlin 541 $marc_encoding = $a->{marc_encoding};
194 dpavlin 538 }
195    
196     =head2 _set_lookup
197    
198     Set current lookup hash
199    
200     _set_lookup( $lookup );
201    
202     =cut
203    
204     my $lookup;
205    
206     sub _set_lookup {
207     $lookup = shift;
208     }
209    
210 dpavlin 707 =head2 _get_lookup
211    
212     Get current lookup hash
213    
214     my $lookup = _get_lookup();
215    
216     =cut
217    
218     sub _get_lookup {
219     return $lookup;
220     }
221    
222 dpavlin 736 =head2 _set_load_row
223 dpavlin 725
224     Setup code reference which will return L<data_structure> from
225     L<WebPAC::Store>
226    
227 dpavlin 736 _set_load_row(sub {
228 dpavlin 725 my ($database,$input,$mfn) = @_;
229 dpavlin 736 $store->load_row( database => $database, input => $input, id => $mfn );
230 dpavlin 725 });
231    
232     =cut
233    
234 dpavlin 736 sub _set_load_row {
235 dpavlin 725 my $coderef = shift;
236     confess "argument isn't CODE" unless ref($coderef) eq 'CODE';
237    
238 dpavlin 736 $load_row_coderef = $coderef;
239 dpavlin 725 }
240    
241 dpavlin 547 =head2 _get_marc_fields
242 dpavlin 540
243 dpavlin 547 Get all fields defined by calls to C<marc>
244 dpavlin 540
245 dpavlin 547 $marc->add_fields( WebPAC::Normalize:_get_marc_fields() );
246 dpavlin 540
247 dpavlin 543 We are using I<magic> which detect repeatable fields only from
248     sequence of field/subfield data generated by normalization.
249    
250 dpavlin 554 Repeatable field is created when there is second occurence of same subfield or
251     if any of indicators are different.
252 dpavlin 543
253 dpavlin 554 This is sane for most cases. Something like:
254 dpavlin 543
255 dpavlin 554 900a-1 900b-1 900c-1
256     900a-2 900b-2
257     900a-3
258    
259     will be created from any combination of:
260    
261     900a-1 900a-2 900a-3 900b-1 900b-2 900c-1
262    
263     and following rules:
264    
265     marc('900','a', rec('200','a') );
266     marc('900','b', rec('200','b') );
267     marc('900','c', rec('200','c') );
268    
269     which might not be what you have in mind. If you need repeatable subfield,
270     define it using C<marc_repeatable_subfield> like this:
271    
272 dpavlin 574 marc_repeatable_subfield('900','a');
273     marc('900','a', rec('200','a') );
274     marc('900','b', rec('200','b') );
275     marc('900','c', rec('200','c') );
276 dpavlin 554
277 dpavlin 574 will create:
278    
279     900a-1 900a-2 900a-3 900b-1 900c-1
280     900b-2
281    
282     There is also support for returning next or specific using:
283    
284     while (my $mf = WebPAC::Normalize:_get_marc_fields( fetch_next => 1 ) ) {
285     # do something with $mf
286     }
287    
288     will always return fields from next MARC record or
289    
290     my $mf = WebPAC::Normalize::_get_marc_fields( offset => 42 );
291    
292     will return 42th copy record (if it exists).
293    
294 dpavlin 540 =cut
295    
296 dpavlin 813 my $fetch_pos;
297    
298 dpavlin 547 sub _get_marc_fields {
299 dpavlin 550
300 dpavlin 574 my $arg = {@_};
301     warn "### _get_marc_fields arg: ", dump($arg), $/ if ($debug > 2);
302 dpavlin 813 $fetch_pos = $marc_fetch_offset;
303 dpavlin 574 if ($arg->{offset}) {
304 dpavlin 813 $fetch_pos = $arg->{offset};
305 dpavlin 574 } elsif($arg->{fetch_next}) {
306     $marc_fetch_offset++;
307     }
308 dpavlin 550
309 dpavlin 574 return if (! $marc_record || ref($marc_record) ne 'ARRAY');
310    
311     warn "### full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 2);
312    
313 dpavlin 813 my $marc_rec = $marc_record->[ $fetch_pos ];
314 dpavlin 574
315 dpavlin 813 warn "## _get_marc_fields (at offset: $fetch_pos) -- marc_record = ", dump( @$marc_rec ), $/ if ($debug > 1);
316 dpavlin 574
317     return if (! $marc_rec || ref($marc_rec) ne 'ARRAY' || $#{ $marc_rec } < 0);
318    
319 dpavlin 550 # first, sort all existing fields
320     # XXX might not be needed, but modern perl might randomize elements in hash
321     my @sorted_marc_record = sort {
322 dpavlin 572 $a->[0] . ( $a->[3] || '' ) cmp $b->[0] . ( $b->[3] || '')
323 dpavlin 574 } @{ $marc_rec };
324 dpavlin 550
325 dpavlin 574 @sorted_marc_record = @{ $marc_rec }; ### FIXME disable sorting
326 dpavlin 562
327 dpavlin 550 # output marc fields
328 dpavlin 542 my @m;
329 dpavlin 550
330     # count unique field-subfields (used for offset when walking to next subfield)
331     my $u;
332 dpavlin 572 map { $u->{ $_->[0] . ( $_->[3] || '') }++ } @sorted_marc_record;
333 dpavlin 550
334     if ($debug) {
335 dpavlin 574 warn "## marc_repeatable_subfield = ", dump( $marc_repeatable_subfield ), $/ if ( $marc_repeatable_subfield );
336 dpavlin 813 warn "## marc_record[$fetch_pos] = ", dump( $marc_rec ), $/;
337 dpavlin 574 warn "## sorted_marc_record = ", dump( \@sorted_marc_record ), $/;
338     warn "## subfield count = ", dump( $u ), $/;
339 dpavlin 550 }
340    
341     my $len = $#sorted_marc_record;
342     my $visited;
343     my $i = 0;
344     my $field;
345    
346     foreach ( 0 .. $len ) {
347    
348     # find next element which isn't visited
349     while ($visited->{$i}) {
350     $i = ($i + 1) % ($len + 1);
351 dpavlin 542 }
352    
353 dpavlin 550 # mark it visited
354     $visited->{$i}++;
355    
356 dpavlin 574 my $row = dclone( $sorted_marc_record[$i] );
357 dpavlin 550
358     # field and subfield which is key for
359     # marc_repeatable_subfield and u
360 dpavlin 572 my $fsf = $row->[0] . ( $row->[3] || '' );
361 dpavlin 550
362     if ($debug > 1) {
363    
364     print "### field so far [", $#$field, "] : ", dump( $field ), " ", $field ? 'T' : 'F', $/;
365     print "### this [$i]: ", dump( $row ),$/;
366     print "### sf: ", $row->[3], " vs ", $field->[3],
367     $marc_repeatable_subfield->{ $row->[0] . $row->[3] } ? ' (repeatable)' : '', $/,
368     if ($#$field >= 0);
369    
370     }
371    
372     # if field exists
373     if ( $#$field >= 0 ) {
374     if (
375     $row->[0] ne $field->[0] || # field
376     $row->[1] ne $field->[1] || # i1
377     $row->[2] ne $field->[2] # i2
378     ) {
379     push @m, $field;
380     warn "## saved/1 ", dump( $field ),$/ if ($debug);
381     $field = $row;
382    
383     } elsif (
384     ( $row->[3] lt $field->[-2] ) # subfield which is not next (e.g. a after c)
385     ||
386     ( $row->[3] eq $field->[-2] && # same subfield, but not repeatable
387     ! $marc_repeatable_subfield->{ $fsf }
388     )
389     ) {
390     push @m, $field;
391     warn "## saved/2 ", dump( $field ),$/ if ($debug);
392     $field = $row;
393    
394     } else {
395     # append new subfields to existing field
396     push @$field, ( $row->[3], $row->[4] );
397     }
398     } else {
399     # insert first field
400     $field = $row;
401     }
402    
403     if (! $marc_repeatable_subfield->{ $fsf }) {
404     # make step to next subfield
405     $i = ($i + $u->{ $fsf } ) % ($len + 1);
406     }
407 dpavlin 542 }
408    
409 dpavlin 550 if ($#$field >= 0) {
410     push @m, $field;
411     warn "## saved/3 ", dump( $field ),$/ if ($debug);
412     }
413 dpavlin 542
414 dpavlin 579 return \@m;
415 dpavlin 540 }
416    
417 dpavlin 813 =head2 _get_marc_leader
418    
419     Return leader from currently fetched record by L</_get_marc_fields>
420    
421     print WebPAC::Normalize::_get_marc_leader();
422    
423     =cut
424    
425     sub _get_marc_leader {
426     die "no fetch_pos, did you called _get_marc_fields first?" unless ( defined( $fetch_pos ) );
427     return $marc_leader->[ $fetch_pos ];
428     }
429    
430 dpavlin 554 =head2 _debug
431    
432     Change level of debug warnings
433    
434     _debug( 2 );
435    
436     =cut
437    
438     sub _debug {
439     my $l = shift;
440     return $debug unless defined($l);
441 dpavlin 568 warn "debug level $l",$/ if ($l > 0);
442 dpavlin 554 $debug = $l;
443     }
444    
445 dpavlin 540 =head1 Functions to create C<data_structure>
446    
447     Those functions generally have to first in your normalization file.
448    
449 dpavlin 912 =head2 search_display
450 dpavlin 433
451 dpavlin 912 Define output for L<search> and L<display> at the same time
452 dpavlin 433
453 dpavlin 912 search_display('Title', rec('200','a') );
454 dpavlin 13
455    
456     =cut
457    
458 dpavlin 912 sub search_display {
459     my $name = shift or die "search_display needs name as first argument";
460 dpavlin 536 my @o = grep { defined($_) && $_ ne '' } @_;
461     return unless (@o);
462     $out->{$name}->{search} = \@o;
463     $out->{$name}->{display} = \@o;
464     }
465 dpavlin 13
466 dpavlin 915 =head2 tag
467    
468     Old name for L<search_display>, but supported
469    
470     =cut
471    
472     sub tag {
473     search_display( @_ );
474     }
475    
476 dpavlin 536 =head2 display
477 dpavlin 13
478 dpavlin 912 Define output just for I<display>
479 dpavlin 125
480 dpavlin 536 @v = display('Title', rec('200','a') );
481 dpavlin 125
482 dpavlin 536 =cut
483 dpavlin 125
484 dpavlin 923 sub _field {
485     my $type = shift or confess "need type -- BUG?";
486     my $name = shift or confess "needs name as first argument";
487 dpavlin 536 my @o = grep { defined($_) && $_ ne '' } @_;
488     return unless (@o);
489 dpavlin 923 $out->{$name}->{$type} = \@o;
490 dpavlin 536 }
491 dpavlin 13
492 dpavlin 923 sub display { _field( 'display', @_ ) }
493    
494 dpavlin 536 =head2 search
495 dpavlin 13
496 dpavlin 536 Prepare values just for I<search>
497 dpavlin 13
498 dpavlin 536 @v = search('Title', rec('200','a') );
499 dpavlin 433
500 dpavlin 536 =cut
501 dpavlin 13
502 dpavlin 923 sub search { _field( 'search', @_ ) }
503 dpavlin 13
504 dpavlin 923 =head2 sorted
505    
506     Insert into lists which will be automatically sorted
507    
508     sorted('Title', rec('200','a') );
509    
510     =cut
511    
512     sub sorted { _field( 'sorted', @_ ) }
513    
514    
515 dpavlin 564 =head2 marc_leader
516    
517     Setup fields within MARC leader or get leader
518    
519     marc_leader('05','c');
520     my $leader = marc_leader();
521    
522     =cut
523    
524     sub marc_leader {
525     my ($offset,$value) = @_;
526    
527     if ($offset) {
528 dpavlin 813 $marc_leader->[ $marc_record_offset ]->{ $offset } = $value;
529 dpavlin 564 } else {
530 dpavlin 813
531     if (defined($marc_leader)) {
532     die "marc_leader not array = ", dump( $marc_leader ) unless (ref($marc_leader) eq 'ARRAY');
533     return $marc_leader->[ $marc_record_offset ];
534     } else {
535     return;
536     }
537 dpavlin 564 }
538     }
539    
540 dpavlin 815 =head2 marc_fixed
541    
542     Create control/indentifier fields with values in fixed positions
543    
544     marc_fixed('008', 00, '070402');
545     marc_fixed('008', 39, '|');
546    
547     Positions not specified will be filled with spaces (C<0x20>).
548    
549     There will be no effort to extend last specified value to full length of
550     field in standard.
551    
552     =cut
553    
554     sub marc_fixed {
555     my ($f, $pos, $val) = @_;
556     die "need marc(field, position, value)" unless defined($f) && defined($pos);
557    
558 dpavlin 889 confess "need val" unless defined $val;
559    
560 dpavlin 815 my $update = 0;
561    
562     map {
563     if ($_->[0] eq $f) {
564     my $old = $_->[1];
565 dpavlin 889 if (length($old) <= $pos) {
566 dpavlin 815 $_->[1] .= ' ' x ( $pos - length($old) ) . $val;
567 dpavlin 817 warn "## marc_fixed($f,$pos,'$val') append '$old' -> '$_->[1]'\n" if ($debug > 1);
568 dpavlin 815 } else {
569     $_->[1] = substr($old, 0, $pos) . $val . substr($old, $pos + length($val));
570 dpavlin 817 warn "## marc_fixed($f,$pos,'$val') update '$old' -> '$_->[1]'\n" if ($debug > 1);
571 dpavlin 815 }
572     $update++;
573     }
574     } @{ $marc_record->[ $marc_record_offset ] };
575    
576     if (! $update) {
577     my $v = ' ' x $pos . $val;
578     push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $v ];
579 dpavlin 817 warn "## marc_fixed($f,$pos,'val') created '$v'\n" if ($debug > 1);
580 dpavlin 815 }
581     }
582    
583 dpavlin 547 =head2 marc
584 dpavlin 540
585     Save value for MARC field
586    
587 dpavlin 547 marc('900','a', rec('200','a') );
588 dpavlin 571 marc('001', rec('000') );
589 dpavlin 540
590     =cut
591    
592 dpavlin 547 sub marc {
593     my $f = shift or die "marc needs field";
594     die "marc field must be numer" unless ($f =~ /^\d+$/);
595 dpavlin 540
596 dpavlin 571 my $sf;
597     if ($f >= 10) {
598     $sf = shift or die "marc needs subfield";
599     }
600 dpavlin 540
601 dpavlin 541 foreach (@_) {
602     my $v = $_; # make var read-write for Encode
603 dpavlin 543 next unless (defined($v) && $v !~ /^\s*$/);
604 dpavlin 548 my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
605 dpavlin 571 if (defined $sf) {
606 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $i1, $i2, $sf => $v ];
607 dpavlin 571 } else {
608 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, [ $f, $v ];
609 dpavlin 571 }
610 dpavlin 540 }
611     }
612    
613 dpavlin 547 =head2 marc_repeatable_subfield
614    
615     Save values for MARC repetable subfield
616    
617     marc_repeatable_subfield('910', 'z', rec('909') );
618    
619     =cut
620    
621     sub marc_repeatable_subfield {
622 dpavlin 550 my ($f,$sf) = @_;
623     die "marc_repeatable_subfield need field and subfield!\n" unless ($f && $sf);
624     $marc_repeatable_subfield->{ $f . $sf }++;
625 dpavlin 547 marc(@_);
626     }
627    
628     =head2 marc_indicators
629    
630     Set both indicators for MARC field
631    
632     marc_indicators('900', ' ', 1);
633    
634     Any indicator value other than C<0-9> will be treated as undefined.
635    
636     =cut
637    
638     sub marc_indicators {
639     my $f = shift || die "marc_indicators need field!\n";
640     my ($i1,$i2) = @_;
641     die "marc_indicators($f, ...) need i1!\n" unless(defined($i1));
642     die "marc_indicators($f, $i1, ...) need i2!\n" unless(defined($i2));
643    
644     $i1 = ' ' if ($i1 !~ /^\d$/);
645     $i2 = ' ' if ($i2 !~ /^\d$/);
646 dpavlin 548 @{ $marc_indicators->{$f} } = ($i1,$i2);
647 dpavlin 547 }
648    
649 dpavlin 562 =head2 marc_compose
650 dpavlin 547
651 dpavlin 562 Save values for each MARC subfield explicitly
652    
653     marc_compose('900',
654     'a', rec('200','a')
655     'b', rec('201','a')
656     'a', rec('200','b')
657     'c', rec('200','c')
658     );
659    
660 dpavlin 603 If you specify C<+> for subfield, value will be appended
661     to previous defined subfield.
662    
663 dpavlin 562 =cut
664    
665     sub marc_compose {
666     my $f = shift or die "marc_compose needs field";
667     die "marc_compose field must be numer" unless ($f =~ /^\d+$/);
668    
669     my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
670     my $m = [ $f, $i1, $i2 ];
671    
672 dpavlin 583 warn "### marc_compose input subfields = ", dump(@_),$/ if ($debug > 2);
673    
674 dpavlin 619 if ($#_ % 2 != 1) {
675     die "ERROR: marc_compose",dump($f,@_)," not valid (must be even).\nDo you need to add first() or join() around some argument?\n";
676     }
677    
678 dpavlin 562 while (@_) {
679 dpavlin 619 my $sf = shift;
680 dpavlin 565 my $v = shift;
681 dpavlin 562
682     next unless (defined($v) && $v !~ /^\s*$/);
683 dpavlin 568 warn "## ++ marc_compose($f,$sf,$v) ", dump( $m ),$/ if ($debug > 1);
684 dpavlin 603 if ($sf ne '+') {
685     push @$m, ( $sf, $v );
686     } else {
687     $m->[ $#$m ] .= $v;
688     }
689 dpavlin 562 }
690    
691 dpavlin 586 warn "## marc_compose current marc = ", dump( $m ),$/ if ($debug > 1);
692 dpavlin 562
693 dpavlin 574 push @{ $marc_record->[ $marc_record_offset ] }, $m if ($#{$m} > 2);
694 dpavlin 562 }
695    
696 dpavlin 574 =head2 marc_duplicate
697 dpavlin 562
698 dpavlin 574 Generate copy of current MARC record and continue working on copy
699    
700     marc_duplicate();
701    
702     Copies can be accessed using C<< _get_marc_fields( fetch_next => 1 ) >> or
703     C<< _get_marc_fields( offset => 42 ) >>.
704    
705     =cut
706    
707     sub marc_duplicate {
708     my $m = $marc_record->[ -1 ];
709     die "can't duplicate record which isn't defined" unless ($m);
710     push @{ $marc_record }, dclone( $m );
711 dpavlin 813 push @{ $marc_leader }, dclone( marc_leader() );
712     warn "## marc_duplicate = ", dump(@$marc_leader, @$marc_record), $/ if ($debug > 1);
713 dpavlin 574 $marc_record_offset = $#{ $marc_record };
714     warn "## marc_record_offset = $marc_record_offset", $/ if ($debug > 1);
715 dpavlin 813
716 dpavlin 574 }
717    
718     =head2 marc_remove
719    
720     Remove some field or subfield from MARC record.
721    
722     marc_remove('200');
723     marc_remove('200','a');
724    
725     This will erase field C<200> or C<200^a> from current MARC record.
726    
727 dpavlin 786 marc_remove('*');
728    
729     Will remove all fields in current MARC record.
730    
731 dpavlin 574 This is useful after calling C<marc_duplicate> or on it's own (but, you
732     should probably just remove that subfield definition if you are not
733     using C<marc_duplicate>).
734    
735     FIXME: support fields < 10.
736    
737     =cut
738    
739     sub marc_remove {
740     my ($f, $sf) = @_;
741    
742     die "marc_remove needs record number" unless defined($f);
743    
744     my $marc = $marc_record->[ $marc_record_offset ];
745    
746     warn "### marc_remove before = ", dump( $marc ), $/ if ($debug > 2);
747    
748 dpavlin 786 if ($f eq '*') {
749    
750     delete( $marc_record->[ $marc_record_offset ] );
751 dpavlin 788 warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
752 dpavlin 786
753     } else {
754    
755     my $i = 0;
756     foreach ( 0 .. $#{ $marc } ) {
757     last unless (defined $marc->[$i]);
758     warn "#### working on ",dump( @{ $marc->[$i] }), $/ if ($debug > 3);
759     if ($marc->[$i]->[0] eq $f) {
760     if (! defined $sf) {
761     # remove whole field
762     splice @$marc, $i, 1;
763     warn "#### slice \@\$marc, $i, 1 = ",dump( @{ $marc }), $/ if ($debug > 3);
764     $i--;
765     } else {
766     foreach my $j ( 0 .. (( $#{ $marc->[$i] } - 3 ) / 2) ) {
767     my $o = ($j * 2) + 3;
768     if ($marc->[$i]->[$o] eq $sf) {
769     # remove subfield
770     splice @{$marc->[$i]}, $o, 2;
771     warn "#### slice \@{\$marc->[$i]}, $o, 2 = ", dump( @{ $marc }), $/ if ($debug > 3);
772     # is record now empty?
773     if ($#{ $marc->[$i] } == 2) {
774     splice @$marc, $i, 1;
775     warn "#### slice \@\$marc, $i, 1 = ", dump( @{ $marc }), $/ if ($debug > 3);
776     $i--;
777     };
778     }
779 dpavlin 574 }
780     }
781     }
782 dpavlin 786 $i++;
783 dpavlin 574 }
784 dpavlin 786
785     warn "### marc_remove($f", $sf ? ",$sf" : "", ") after = ", dump( $marc ), $/ if ($debug > 2);
786    
787     $marc_record->[ $marc_record_offset ] = $marc;
788 dpavlin 574 }
789    
790     warn "## full marc_record = ", dump( @{ $marc_record }), $/ if ($debug > 1);
791     }
792    
793 dpavlin 604 =head2 marc_original_order
794    
795     Copy all subfields preserving original order to marc field.
796    
797 dpavlin 616 marc_original_order( marc_field_number, original_input_field_number );
798 dpavlin 604
799 dpavlin 616 Please note that field numbers are consistent with other commands (marc
800     field number first), but somewhat counter-intuitive (destination and then
801     source).
802    
803 dpavlin 604 You might want to use this command if you are just renaming subfields or
804     using pre-processing modify_record in C<config.yml> and don't need any
805     post-processing or want to preserve order of original subfields.
806    
807 dpavlin 616
808 dpavlin 604 =cut
809    
810     sub marc_original_order {
811    
812 dpavlin 616 my ($to, $from) = @_;
813 dpavlin 604 die "marc_original_order needs from and to fields\n" unless ($from && $to);
814    
815 dpavlin 616 return unless defined($rec->{$from});
816    
817     my $r = $rec->{$from};
818 dpavlin 604 die "record field $from isn't array\n" unless (ref($r) eq 'ARRAY');
819    
820     my ($i1,$i2) = defined($marc_indicators->{$to}) ? @{ $marc_indicators->{$to} } : (' ',' ');
821 dpavlin 616 warn "## marc_original_order($to,$from) source = ", dump( $r ),$/ if ($debug > 1);
822 dpavlin 604
823     foreach my $d (@$r) {
824    
825 dpavlin 605 if (! defined($d->{subfields}) && ref($d->{subfields}) ne 'ARRAY') {
826 dpavlin 616 warn "# marc_original_order($to,$from): field $from doesn't have subfields specification\n";
827 dpavlin 605 next;
828     }
829    
830 dpavlin 604 my @sfs = @{ $d->{subfields} };
831    
832     die "field $from doesn't have even number of subfields specifications\n" unless($#sfs % 2 == 1);
833    
834 dpavlin 618 warn "#--> d: ",dump($d), "\n#--> sfs: ",dump(@sfs),$/ if ($debug > 2);
835 dpavlin 604
836     my $m = [ $to, $i1, $i2 ];
837    
838     while (my $sf = shift @sfs) {
839 dpavlin 618
840     warn "#--> sf: ",dump($sf), $/ if ($debug > 2);
841 dpavlin 604 my $offset = shift @sfs;
842     die "corrupted sufields specification for field $from\n" unless defined($offset);
843    
844     my $v;
845     if (ref($d->{$sf}) eq 'ARRAY') {
846     $v = $d->{$sf}->[$offset] if (defined($d->{$sf}->[$offset]));
847     } elsif ($offset == 0) {
848     $v = $d->{$sf};
849     } else {
850     die "field $from subfield '$sf' need occurence $offset which doesn't exist", dump($d->{$sf});
851     }
852     push @$m, ( $sf, $v ) if (defined($v));
853     }
854    
855     if ($#{$m} > 2) {
856     push @{ $marc_record->[ $marc_record_offset ] }, $m;
857     }
858     }
859    
860     warn "## marc_record = ", dump( $marc_record ),$/ if ($debug > 1);
861     }
862    
863 dpavlin 1013 =head2 marc_template
864    
865     =cut
866    
867     sub marc_template {
868     my $args = {@_};
869     warn "## marc_template(",dump($args),")";
870    
871     foreach ( qw/subfields_rename marc_template/ ) {
872     # warn "ref($_) = ",ref($args->{$_});
873     die "$_ not ARRAY" if ref($args->{$_}) ne 'ARRAY';
874     }
875    
876     my $r = $rec->{ $args->{from} }; # || return;
877     die "record field ", $args->{from}, " isn't array\n" unless (ref($r) eq 'ARRAY');
878    
879     my @subfields_rename = @{ $args->{subfields_rename} };
880     # warn "### subfields_rename [$#subfields_rename] = ",dump( @subfields_rename );
881    
882     confess "need mapping in pairs for subfields_rename"
883     if $#subfields_rename % 2 != 1;
884    
885     my ( $subfields_rename, $from_subfields, $to_subfields );
886     while ( my ( $from, $to ) = splice(@subfields_rename, 0, 2) ) {
887     my ( $f, $t ) = (
888     $from_subfields->{ $from }++,
889     $to_subfields->{ $to }++
890     );
891     $subfields_rename->{ $from }->[ $f ] = [ $to => $t ];
892     }
893     warn "### subfields_rename = ",dump( $subfields_rename ),$/;
894     warn "### from_subfields = ", dump( $from_subfields ),$/;
895     warn "### to_subfields = ", dump( $to_subfields ),$/;
896    
897     my $fields_re = join('|', keys %$to_subfields );
898    
899     my $pos_templates;
900     my $count;
901     my @marc_order;
902     my $marc_template_order;
903     my $fill_in;
904     my @marc_out;
905    
906     foreach my $template ( @{ $args->{marc_template} } ) {
907     $count = {};
908     @marc_order = ();
909     sub my_count {
910     my $sf = shift;
911     my $nr = $count->{$sf}++;
912     push @marc_order, [ $sf, $nr ];
913     return $sf . $nr;
914     }
915     my $pos_template = $template;
916     $pos_template =~ s/($fields_re)/my_count($1)/ge;
917     my $count_key = dump( $count );
918     warn "### template: |$template| -> |$pos_template| count = $count_key marc_order = ",dump( @marc_order ),$/;
919     $pos_templates->{ $count_key } = $pos_template;
920     $marc_template_order->{ $pos_template } = [ @marc_order ];
921     }
922     warn "### from ",dump( $args->{marc_template} ), " created ", dump( $pos_templates ), " and ", dump( $marc_template_order );
923    
924     my $m;
925    
926     foreach my $r ( @{ $rec->{ $args->{from} } } ) {
927    
928     my $i1 = $r->{i1} || ' ';
929     my $i2 = $r->{i2} || ' ';
930     $m = [ $args->{to}, $i1, $i2 ];
931    
932     warn "### r = ",dump( $r );
933    
934     my ( $new_r, $from_count, $to_count );
935     foreach my $sf ( keys %{$r} ) {
936     my $nr = $from_count->{$sf}++;
937     my $rename_to = $subfields_rename->{ $sf }; # ||
938     # die "can't find subfield rename for $sf/$nr in ", dump( $subfields_rename );
939     warn "### rename $sf/$nr to ", dump( $rename_to->[$nr] ), $/;
940     my ( $to_sf, $to_nr ) = @{ $rename_to->[$nr] };
941     $new_r->{ $to_sf }->[ $to_nr ] = [ $sf => $nr ];
942    
943     $to_count->{ $to_sf }++;
944     }
945    
946     warn "### new_r = ",dump( $new_r );
947    
948     my $from_count_key = dump( $to_count );
949    
950     warn "### from_count = ",dump( $from_count ), $/;
951     warn "### to_count = ",dump( $to_count ), $/;
952    
953     my $template = $pos_templates->{ $from_count_key } ||
954     die "I don't have template for:\n$from_count_key\n## available templates\n", dump( $pos_templates );
955    
956     warn "### selected template: |$template|\n";
957    
958     $fill_in = {};
959    
960     foreach my $sf ( split(/\|/, $template ) ) {
961     sub fill_in {
962     my ( $r, $sf, $nr ) = @_;
963     my ( $from_sf, $from_nr ) = @{ $new_r->{ $sf }->[ $nr ] };
964     my $v = $r->{ $from_sf }; # || die "no $from_sf/$from_nr";
965     warn "#### fill_in( $sf, $nr ) = $from_sf/$from_nr >>>> ",dump( $v ), $/;
966     if ( ref( $v ) eq 'ARRAY' ) {
967     $fill_in->{$sf}->[$nr] = $v->[$from_nr];
968     return $v->[$from_nr];
969     } elsif ( $from_nr == 0 ) {
970     $fill_in->{$sf}->[$nr] = $v;
971     return $v;
972     } else {
973     die "requested subfield $from_sf/$from_nr but it's ",dump( $v );
974     }
975     }
976     warn "#### $sf <<<< $fields_re\n";
977     $sf =~ s/($fields_re)(\d+)/fill_in($r,$1,$2)/ge;
978     warn "#### >>>> $sf with fill_in = ",dump( $fill_in ),$/;
979     }
980    
981     warn "## template: |$template|\n## marc_template_order = ",dump( $marc_template_order );
982    
983     foreach my $sf ( @{ $marc_template_order->{$template} } ) {
984     my ( $sf, $nr ) = @$sf;
985     my $v = $fill_in->{$sf}->[$nr] || die "can't find fill_in $sf/$nr";
986     warn "++ $sf/$nr |$v|\n";
987     push @$m, [ $sf, $v ];
988     }
989    
990     warn "#### >>>> created marc: ", dump( $m );
991    
992     push @marc_out, $m;
993     }
994    
995     warn "### marc_template produced: ",dump( @marc_out );
996     return @marc_out;
997     }
998    
999 dpavlin 813 =head2 marc_count
1000 dpavlin 604
1001 dpavlin 813 Return number of MARC records created using L</marc_duplicate>.
1002    
1003     print "created ", marc_count(), " records";
1004    
1005     =cut
1006    
1007     sub marc_count {
1008     return $#{ $marc_record };
1009     }
1010    
1011    
1012 dpavlin 540 =head1 Functions to extract data from input
1013    
1014     This function should be used inside functions to create C<data_structure> described
1015     above.
1016    
1017 dpavlin 641 =head2 _pack_subfields_hash
1018    
1019 dpavlin 669 @subfields = _pack_subfields_hash( $h );
1020     $subfields = _pack_subfields_hash( $h, 1 );
1021 dpavlin 641
1022 dpavlin 669 Return each subfield value in array or pack them all together and return scalar
1023     with subfields (denoted by C<^>) and values.
1024    
1025 dpavlin 641 =cut
1026    
1027     sub _pack_subfields_hash {
1028    
1029 dpavlin 642 warn "## _pack_subfields_hash( ",dump(@_), " )\n" if ($debug > 1);
1030 dpavlin 641
1031     my ($h,$include_subfields) = @_;
1032    
1033 dpavlin 831 # sanity and ease of use
1034     return $h if (ref($h) ne 'HASH');
1035    
1036 dpavlin 641 if ( defined($h->{subfields}) ) {
1037     my $sfs = delete $h->{subfields} || die "no subfields?";
1038     my @out;
1039     while (@$sfs) {
1040     my $sf = shift @$sfs;
1041     push @out, '^' . $sf if ($include_subfields);
1042     my $o = shift @$sfs;
1043     if ($o == 0 && ref( $h->{$sf} ) ne 'ARRAY' ) {
1044     # single element subfields are not arrays
1045 dpavlin 669 #warn "====> $sf $o / $#$sfs ", dump( $sfs, $h->{$sf} ), "\n";
1046 dpavlin 667
1047 dpavlin 641 push @out, $h->{$sf};
1048     } else {
1049 dpavlin 669 #warn "====> $sf $o / $#$sfs ", dump( $sfs, $h->{$sf} ), "\n";
1050 dpavlin 641 push @out, $h->{$sf}->[$o];
1051     }
1052     }
1053 dpavlin 667 if ($include_subfields) {
1054     return join('', @out);
1055     } else {
1056     return @out;
1057     }
1058 dpavlin 641 } else {
1059 dpavlin 667 if ($include_subfields) {
1060     my $out = '';
1061 dpavlin 668 foreach my $sf (sort keys %$h) {
1062 dpavlin 667 if (ref($h->{$sf}) eq 'ARRAY') {
1063     $out .= '^' . $sf . join('^' . $sf, @{ $h->{$sf} });
1064     } else {
1065     $out .= '^' . $sf . $h->{$sf};
1066     }
1067     }
1068     return $out;
1069     } else {
1070     # FIXME this should probably be in alphabetical order instead of hash order
1071     values %{$h};
1072     }
1073 dpavlin 641 }
1074     }
1075    
1076 dpavlin 536 =head2 rec1
1077 dpavlin 371
1078 dpavlin 536 Return all values in some field
1079 dpavlin 371
1080 dpavlin 536 @v = rec1('200')
1081 dpavlin 15
1082 dpavlin 536 TODO: order of values is probably same as in source data, need to investigate that
1083 dpavlin 15
1084 dpavlin 536 =cut
1085 dpavlin 15
1086 dpavlin 536 sub rec1 {
1087     my $f = shift;
1088 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
1089 dpavlin 536 return unless (defined($rec) && defined($rec->{$f}));
1090 dpavlin 571 warn "rec1($f) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
1091 dpavlin 536 if (ref($rec->{$f}) eq 'ARRAY') {
1092 dpavlin 641 my @out;
1093     foreach my $h ( @{ $rec->{$f} } ) {
1094     if (ref($h) eq 'HASH') {
1095     push @out, ( _pack_subfields_hash( $h ) );
1096 dpavlin 31 } else {
1097 dpavlin 641 push @out, $h;
1098 dpavlin 31 }
1099 dpavlin 641 }
1100     return @out;
1101 dpavlin 536 } elsif( defined($rec->{$f}) ) {
1102     return $rec->{$f};
1103 dpavlin 15 }
1104     }
1105    
1106 dpavlin 536 =head2 rec2
1107 dpavlin 15
1108 dpavlin 536 Return all values in specific field and subfield
1109 dpavlin 13
1110 dpavlin 536 @v = rec2('200','a')
1111 dpavlin 13
1112     =cut
1113    
1114 dpavlin 536 sub rec2 {
1115     my $f = shift;
1116     return unless (defined($rec && $rec->{$f}));
1117     my $sf = shift;
1118 dpavlin 601 warn "rec2($f,$sf) = ", dump( $rec->{$f} ), $/ if ($debug > 1);
1119 dpavlin 589 return map {
1120     if (ref($_->{$sf}) eq 'ARRAY') {
1121     @{ $_->{$sf} };
1122     } else {
1123     $_->{$sf};
1124     }
1125     } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} };
1126 dpavlin 536 }
1127 dpavlin 13
1128 dpavlin 536 =head2 rec
1129 dpavlin 13
1130 dpavlin 536 syntaxtic sugar for
1131 dpavlin 13
1132 dpavlin 536 @v = rec('200')
1133     @v = rec('200','a')
1134 dpavlin 13
1135 dpavlin 750 If rec() returns just single value, it will
1136     return scalar, not array.
1137    
1138 dpavlin 536 =cut
1139 dpavlin 373
1140 dpavlin 536 sub rec {
1141 dpavlin 583 my @out;
1142 dpavlin 536 if ($#_ == 0) {
1143 dpavlin 583 @out = rec1(@_);
1144 dpavlin 536 } elsif ($#_ == 1) {
1145 dpavlin 583 @out = rec2(@_);
1146 dpavlin 13 }
1147 dpavlin 750 if ($#out == 0 && ! wantarray) {
1148     return $out[0];
1149     } elsif (@out) {
1150 dpavlin 583 return @out;
1151     } else {
1152     return '';
1153     }
1154 dpavlin 13 }
1155    
1156 dpavlin 1012 =head2 frec
1157    
1158     Returns first value from field
1159    
1160     $v = frec('200');
1161     $v = frec('200','a');
1162    
1163     =cut
1164    
1165     sub frec {
1166     my @out = rec(@_);
1167     warn "rec(",dump(@_),") has more than one return value, ignoring\n" if $#out > 0;
1168     return shift @out;
1169     }
1170    
1171 dpavlin 1015 =head2 frec_eq
1172    
1173     =head2 frec_ne
1174    
1175     Check if first values from two fields are same or different
1176    
1177     if ( frec_eq( 900 => 'a', 910 => 'c' ) ) {
1178     # values are same
1179     } else {
1180     # values are different
1181     }
1182    
1183     Strictly speaking C<frec_eq> and C<frec_ne> wouldn't be needed if you
1184     could write something like:
1185    
1186     if ( frec( '900','a' ) eq frec( '910','c' ) ) {
1187     # yada tada
1188     }
1189    
1190     but you can't since our parser L<WebPAC::Parser> will remove all whitespaces
1191     in order to parse text and create invalid function C<eqfrec>.
1192    
1193     =cut
1194    
1195     sub frec_eq {
1196     my ( $f1,$sf1, $f2, $sf2 ) = @_;
1197     return (rec( $f1, $sf1 ))[0] eq (rec( $f2, $sf2 ))[0];
1198     }
1199    
1200     sub frec_ne {
1201     return ! frec_eq( @_ );
1202     }
1203    
1204 dpavlin 536 =head2 regex
1205 dpavlin 15
1206 dpavlin 536 Apply regex to some or all values
1207 dpavlin 15
1208 dpavlin 536 @v = regex( 's/foo/bar/g', @v );
1209 dpavlin 15
1210     =cut
1211    
1212 dpavlin 536 sub regex {
1213     my $r = shift;
1214     my @out;
1215 dpavlin 550 #warn "r: $r\n", dump(\@_);
1216 dpavlin 536 foreach my $t (@_) {
1217     next unless ($t);
1218     eval "\$t =~ $r";
1219     push @out, $t if ($t && $t ne '');
1220 dpavlin 368 }
1221 dpavlin 536 return @out;
1222 dpavlin 15 }
1223    
1224 dpavlin 536 =head2 prefix
1225 dpavlin 15
1226 dpavlin 536 Prefix all values with a string
1227 dpavlin 15
1228 dpavlin 536 @v = prefix( 'my_', @v );
1229 dpavlin 15
1230     =cut
1231    
1232 dpavlin 536 sub prefix {
1233 dpavlin 819 my $p = shift;
1234     return @_ unless defined( $p );
1235 dpavlin 536 return map { $p . $_ } grep { defined($_) } @_;
1236     }
1237 dpavlin 15
1238 dpavlin 536 =head2 suffix
1239 dpavlin 15
1240 dpavlin 536 suffix all values with a string
1241 dpavlin 15
1242 dpavlin 536 @v = suffix( '_my', @v );
1243 dpavlin 15
1244 dpavlin 536 =cut
1245 dpavlin 15
1246 dpavlin 536 sub suffix {
1247 dpavlin 819 my $s = shift;
1248     return @_ unless defined( $s );
1249 dpavlin 536 return map { $_ . $s } grep { defined($_) } @_;
1250 dpavlin 15 }
1251    
1252 dpavlin 536 =head2 surround
1253 dpavlin 13
1254 dpavlin 536 surround all values with a two strings
1255 dpavlin 13
1256 dpavlin 536 @v = surround( 'prefix_', '_suffix', @v );
1257 dpavlin 13
1258     =cut
1259    
1260 dpavlin 536 sub surround {
1261 dpavlin 819 my $p = shift;
1262     my $s = shift;
1263     $p = '' unless defined( $p );
1264     $s = '' unless defined( $s );
1265 dpavlin 536 return map { $p . $_ . $s } grep { defined($_) } @_;
1266 dpavlin 13 }
1267    
1268 dpavlin 536 =head2 first
1269 dpavlin 13
1270 dpavlin 536 Return first element
1271 dpavlin 15
1272 dpavlin 536 $v = first( @v );
1273 dpavlin 13
1274     =cut
1275    
1276 dpavlin 536 sub first {
1277     my $r = shift;
1278     return $r;
1279 dpavlin 13 }
1280    
1281 dpavlin 536 =head2 lookup
1282 dpavlin 13
1283 dpavlin 536 Consult lookup hashes for some value
1284 dpavlin 13
1285 dpavlin 725 @v = lookup(
1286     sub {
1287     'ffkk/peri/mfn'.rec('000')
1288     },
1289     'ffkk','peri','200-a-200-e',
1290     sub {
1291     first(rec(200,'a')).' '.first(rec('200','e'))
1292     }
1293     );
1294 dpavlin 13
1295 dpavlin 725 Code like above will be B<automatically generated> using L<WebPAC::Parse> from
1296     normal lookup definition in C<conf/lookup/something.pl> which looks like:
1297 dpavlin 707
1298 dpavlin 725 lookup(
1299     # which results to return from record recorded in lookup
1300     sub { 'ffkk/peri/mfn' . rec('000') },
1301     # from which database and input
1302     'ffkk','peri',
1303     # such that following values match
1304     sub { first(rec(200,'a')) . ' ' . first(rec('200','e')) },
1305     # if this part is missing, we will try to match same fields
1306     # from lookup record and current one, or you can override
1307     # which records to use from current record using
1308     sub { rec('900','x') . ' ' . rec('900','y') },
1309     )
1310    
1311     You can think about this lookup as SQL (if that helps):
1312    
1313     select
1314     sub { what }
1315     from
1316     database, input
1317     where
1318     sub { filter from lookuped record }
1319     having
1320     sub { optional filter on current record }
1321    
1322     Easy as pie, right?
1323    
1324 dpavlin 13 =cut
1325    
1326 dpavlin 536 sub lookup {
1327 dpavlin 725 my ($what, $database, $input, $key, $having) = @_;
1328    
1329 dpavlin 766 confess "lookup needs 5 arguments: what, database, input, key, having\n" unless ($#_ == 4);
1330 dpavlin 725
1331 dpavlin 729 warn "## lookup ($database, $input, $key)", $/ if ($debug > 1);
1332 dpavlin 725 return unless (defined($lookup->{$database}->{$input}->{$key}));
1333    
1334 dpavlin 736 confess "lookup really need load_row_coderef added to data_structure\n" unless ($load_row_coderef);
1335 dpavlin 725
1336     my $mfns;
1337     my @having = $having->();
1338    
1339 dpavlin 729 warn "## having = ", dump( @having ) if ($debug > 2);
1340 dpavlin 725
1341     foreach my $h ( @having ) {
1342     if (defined($lookup->{$database}->{$input}->{$key}->{$h})) {
1343 dpavlin 752 warn "lookup for $database/$input/$key/$h return ",dump($lookup->{$database}->{$input}->{$key}->{$h}),"\n" if ($debug);
1344 dpavlin 725 $mfns->{$_}++ foreach keys %{ $lookup->{$database}->{$input}->{$key}->{$h} };
1345     }
1346 dpavlin 536 }
1347 dpavlin 725
1348     return unless ($mfns);
1349    
1350     my @mfns = sort keys %$mfns;
1351    
1352 dpavlin 750 warn "# lookup loading $database/$input/$key mfn ", join(",",@mfns)," having ",dump(@having),"\n" if ($debug);
1353 dpavlin 725
1354     my $old_rec = $rec;
1355     my @out;
1356    
1357     foreach my $mfn (@mfns) {
1358 dpavlin 736 $rec = $load_row_coderef->( $database, $input, $mfn );
1359 dpavlin 725
1360 dpavlin 752 warn "got $database/$input/$mfn = ", dump($rec), $/ if ($debug);
1361 dpavlin 725
1362     my @vals = $what->();
1363    
1364     push @out, ( @vals );
1365    
1366 dpavlin 752 warn "lookup for mfn $mfn returned ", dump(@vals), $/ if ($debug);
1367 dpavlin 725 }
1368    
1369     # if (ref($lookup->{$k}) eq 'ARRAY') {
1370     # return @{ $lookup->{$k} };
1371     # } else {
1372     # return $lookup->{$k};
1373     # }
1374    
1375     $rec = $old_rec;
1376    
1377 dpavlin 750 warn "## lookup returns = ", dump(@out), $/ if ($debug);
1378 dpavlin 725
1379 dpavlin 740 if ($#out == 0) {
1380     return $out[0];
1381     } else {
1382     return @out;
1383     }
1384 dpavlin 13 }
1385    
1386 dpavlin 707 =head2 save_into_lookup
1387    
1388 dpavlin 725 Save value into lookup. It associates current database, input
1389     and specific keys with one or more values which will be
1390     associated over MFN.
1391 dpavlin 707
1392 dpavlin 725 MFN will be extracted from first occurence current of field 000
1393     in current record, or if it doesn't exist from L<_set_config> C<_mfn>.
1394    
1395     my $nr = save_into_lookup($database,$input,$key,sub {
1396 dpavlin 707 # code which produce one or more values
1397     });
1398    
1399 dpavlin 725 It returns number of items saved.
1400 dpavlin 707
1401 dpavlin 725 This function shouldn't be called directly, it's called from code created by
1402     L<WebPAC::Parser>.
1403    
1404 dpavlin 707 =cut
1405    
1406     sub save_into_lookup {
1407 dpavlin 712 my ($database,$input,$key,$coderef) = @_;
1408     die "save_into_lookup needs database" unless defined($database);
1409     die "save_into_lookup needs input" unless defined($input);
1410     die "save_into_lookup needs key" unless defined($key);
1411 dpavlin 707 die "save_into_lookup needs CODE" unless ( defined($coderef) && ref($coderef) eq 'CODE' );
1412 dpavlin 725
1413 dpavlin 729 warn "## save_into_lookup rec = ", dump($rec), " config = ", dump($config), $/ if ($debug > 2);
1414 dpavlin 725
1415     my $mfn =
1416     defined($rec->{'000'}->[0]) ? $rec->{'000'}->[0] :
1417     defined($config->{_mfn}) ? $config->{_mfn} :
1418     die "mfn not defined or zero";
1419    
1420     my $nr = 0;
1421    
1422 dpavlin 707 foreach my $v ( $coderef->() ) {
1423 dpavlin 712 $lookup->{$database}->{$input}->{$key}->{$v}->{$mfn}++;
1424 dpavlin 721 warn "# saved lookup $database/$input/$key [$v] $mfn\n" if ($debug > 1);
1425 dpavlin 725 $nr++;
1426 dpavlin 707 }
1427 dpavlin 725
1428     return $nr;
1429 dpavlin 707 }
1430    
1431 dpavlin 595 =head2 config
1432    
1433     Consult config values stored in C<config.yml>
1434    
1435     # return database code (key under databases in yaml)
1436     $database_code = config(); # use _ from hash
1437     $database_name = config('name');
1438     $database_input_name = config('input name');
1439    
1440     Up to three levels are supported.
1441    
1442     =cut
1443    
1444     sub config {
1445     return unless ($config);
1446    
1447     my $p = shift;
1448    
1449     $p ||= '';
1450    
1451     my $v;
1452    
1453     warn "### getting config($p)\n" if ($debug > 1);
1454    
1455     my @p = split(/\s+/,$p);
1456     if ($#p < 0) {
1457     $v = $config->{ '_' }; # special, database code
1458     } else {
1459    
1460     my $c = dclone( $config );
1461    
1462     foreach my $k (@p) {
1463     warn "### k: $k c = ",dump($c),$/ if ($debug > 1);
1464     if (ref($c) eq 'ARRAY') {
1465     $c = shift @$c;
1466     warn "config($p) taking first occurence of '$k', probably not what you wanted!\n";
1467     last;
1468     }
1469    
1470     if (! defined($c->{$k}) ) {
1471     $c = undef;
1472     last;
1473     } else {
1474     $c = $c->{$k};
1475     }
1476     }
1477     $v = $c if ($c);
1478    
1479     }
1480    
1481     warn "## config( '$p' ) = ",dump( $v ),$/ if ($v && $debug);
1482     warn "config( '$p' ) is empty\n" if (! $v);
1483    
1484     return $v;
1485     }
1486    
1487     =head2 id
1488    
1489     Returns unique id of this record
1490    
1491     $id = id();
1492    
1493     Returns C<42/2> for 2nd occurence of MFN 42.
1494    
1495     =cut
1496    
1497     sub id {
1498     my $mfn = $config->{_mfn} || die "no _mfn in config data";
1499     return $mfn . $#{$marc_record} ? $#{$marc_record} + 1 : '';
1500     }
1501    
1502 dpavlin 536 =head2 join_with
1503 dpavlin 13
1504 dpavlin 536 Joins walues with some delimiter
1505 dpavlin 10
1506 dpavlin 536 $v = join_with(", ", @v);
1507 dpavlin 10
1508 dpavlin 536 =cut
1509 dpavlin 10
1510 dpavlin 536 sub join_with {
1511     my $d = shift;
1512 dpavlin 586 warn "### join_with('$d',",dump(@_),")\n" if ($debug > 2);
1513 dpavlin 583 my $v = join($d, grep { defined($_) && $_ ne '' } @_);
1514     return '' unless defined($v);
1515     return $v;
1516 dpavlin 536 }
1517 dpavlin 10
1518 dpavlin 562 =head2 split_rec_on
1519    
1520     Split record subfield on some regex and take one of parts out
1521    
1522     $a_before_semi_column =
1523     split_rec_on('200','a', /\s*;\s*/, $part);
1524    
1525     C<$part> is optional number of element. First element is
1526     B<1>, not 0!
1527    
1528     If there is no C<$part> parameter or C<$part> is 0, this function will
1529     return all values produced by splitting.
1530    
1531     =cut
1532    
1533     sub split_rec_on {
1534     die "split_rec_on need (fld,sf,regex[,part]" if ($#_ < 2);
1535    
1536     my ($fld, $sf, $regex, $part) = @_;
1537 dpavlin 568 warn "### regex ", ref($regex), $regex, $/ if ($debug > 2);
1538 dpavlin 562
1539     my @r = rec( $fld, $sf );
1540     my $v = shift @r;
1541 dpavlin 568 warn "### first rec($fld,$sf) = ",dump($v),$/ if ($debug > 2);
1542 dpavlin 562
1543 dpavlin 604 return '' if ( ! defined($v) || $v =~ /^\s*$/);
1544 dpavlin 566
1545 dpavlin 562 my @s = split( $regex, $v );
1546 dpavlin 568 warn "## split_rec_on($fld,$sf,$regex,$part) = ",dump(@s),$/ if ($debug > 1);
1547 dpavlin 566 if ($part && $part > 0) {
1548 dpavlin 562 return $s[ $part - 1 ];
1549     } else {
1550 dpavlin 571 return @s;
1551 dpavlin 562 }
1552     }
1553    
1554 dpavlin 785 my $hash;
1555    
1556     =head2 set
1557    
1558     set( key => 'value' );
1559    
1560     =cut
1561    
1562     sub set {
1563     my ($k,$v) = @_;
1564 dpavlin 810 warn "## set ( $k => ", dump($v), " )", $/ if ( $debug );
1565 dpavlin 785 $hash->{$k} = $v;
1566     };
1567    
1568     =head2 get
1569    
1570     get( 'key' );
1571    
1572     =cut
1573    
1574     sub get {
1575     my $k = shift || return;
1576     my $v = $hash->{$k};
1577 dpavlin 810 warn "## get $k = ", dump( $v ), $/ if ( $debug );
1578 dpavlin 785 return $v;
1579     }
1580    
1581 dpavlin 791 =head2 count
1582 dpavlin 785
1583 dpavlin 791 if ( count( @result ) == 1 ) {
1584     # do something if only 1 result is there
1585     }
1586    
1587     =cut
1588    
1589     sub count {
1590 dpavlin 810 warn "## count ",dump(@_),$/ if ( $debug );
1591 dpavlin 791 return @_ . '';
1592     }
1593    
1594 dpavlin 536 # END
1595     1;

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