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

Annotation of /trunk/lib/WebPAC/Input.pm

Parent Directory Parent Directory | Revision Log Revision Log


Revision 844 - (hide annotations)
Sat May 26 10:40:01 2007 UTC (16 years, 10 months ago) by dpavlin
File size: 16597 byte(s)
work with fields which have number 0 (as opposed to 000) which has been
noticed in the wild (invalid, but --stats shouldn't really die)

1 dpavlin 1 package WebPAC::Input;
2    
3     use warnings;
4     use strict;
5    
6 dpavlin 507 use blib;
7    
8 dpavlin 487 use WebPAC::Common;
9 dpavlin 285 use base qw/WebPAC::Common/;
10 dpavlin 771 use Data::Dump qw/dump/;
11 dpavlin 624 use Encode qw/from_to/;
12 dpavlin 285
13 dpavlin 1 =head1 NAME
14    
15 dpavlin 286 WebPAC::Input - read different file formats into WebPAC
16 dpavlin 1
17     =head1 VERSION
18    
19 dpavlin 823 Version 0.18
20 dpavlin 1
21     =cut
22    
23 dpavlin 823 our $VERSION = '0.18';
24 dpavlin 1
25     =head1 SYNOPSIS
26    
27 dpavlin 286 This module implements input as database which have fixed and known
28     I<size> while indexing and single unique numeric identifier for database
29     position ranging from 1 to I<size>.
30 dpavlin 1
31 dpavlin 286 Simply, something that is indexed by unmber from 1 .. I<size>.
32    
33     Examples of such databases are CDS/ISIS files, MARC files, lines in
34     text file, and so on.
35    
36     Specific file formats are implemented using low-level interface modules,
37     located in C<WebPAC::Input::*> namespace which export C<open_db>,
38     C<fetch_rec> and optional C<init> functions.
39    
40 dpavlin 1 Perhaps a little code snippet.
41    
42 dpavlin 597 use WebPAC::Input;
43 dpavlin 1
44 dpavlin 597 my $db = WebPAC::Input->new(
45     module => 'WebPAC::Input::ISIS',
46     );
47 dpavlin 1
48 dpavlin 597 $db->open( path => '/path/to/database' );
49 dpavlin 416 print "database size: ",$db->size,"\n";
50     while (my $rec = $db->fetch) {
51     # do something with $rec
52     }
53 dpavlin 1
54 dpavlin 286
55    
56 dpavlin 1 =head1 FUNCTIONS
57    
58 dpavlin 3 =head2 new
59 dpavlin 1
60 dpavlin 3 Create new input database object.
61    
62 dpavlin 9 my $db = new WebPAC::Input(
63 dpavlin 286 module => 'WebPAC::Input::MARC',
64 dpavlin 585 encoding => 'ISO-8859-2',
65 dpavlin 416 recode => 'char pairs',
66 dpavlin 483 no_progress_bar => 1,
67 dpavlin 9 );
68 dpavlin 3
69 dpavlin 597 C<module> is low-level file format module. See L<WebPAC::Input::ISIS> and
70 dpavlin 286 L<WebPAC::Input::MARC>.
71    
72 dpavlin 585 Optional parametar C<encoding> specify application code page (which will be
73 dpavlin 9 used internally). This should probably be your terminal encoding, and by
74     default, it C<ISO-8859-2>.
75    
76 dpavlin 483 C<recode> is optional string constisting of character or words pairs that
77     should be replaced in input stream.
78    
79     C<no_progress_bar> disables progress bar output on C<STDOUT>
80    
81 dpavlin 285 This function will also call low-level C<init> if it exists with same
82     parametars.
83    
84 dpavlin 1 =cut
85    
86 dpavlin 3 sub new {
87 dpavlin 285 my $class = shift;
88     my $self = {@_};
89 dpavlin 3 bless($self, $class);
90    
91 dpavlin 285 my $log = $self->_get_logger;
92    
93 dpavlin 585 $log->logconfess("code_page argument is not suppored any more. change it to encoding") if ($self->{lookup});
94     $log->logconfess("lookup argument is not suppored any more. rewrite call to lookup_ref") if ($self->{lookup});
95 dpavlin 761 $log->logconfess("low_mem argument is not suppored any more. rewrite it to load_row and save_row") if ($self->{low_mem});
96 dpavlin 585
97 dpavlin 286 $log->logconfess("specify low-level file format module") unless ($self->{module});
98 dpavlin 726 my $module_path = $self->{module};
99     $module_path =~ s#::#/#g;
100     $module_path .= '.pm';
101     $log->debug("require low-level module $self->{module} from $module_path");
102 dpavlin 289
103 dpavlin 726 require $module_path;
104 dpavlin 286
105 dpavlin 585 $self->{'encoding'} ||= 'ISO-8859-2';
106 dpavlin 9
107 dpavlin 3 $self ? return $self : return undef;
108 dpavlin 1 }
109    
110 dpavlin 285 =head2 open
111    
112     This function will read whole database in memory and produce lookups.
113    
114 dpavlin 761 my $store; # simple in-memory hash
115    
116 dpavlin 286 $input->open(
117 dpavlin 285 path => '/path/to/database/file',
118 dpavlin 624 code_page => 'cp852',
119 dpavlin 286 limit => 500,
120     offset => 6000,
121 dpavlin 506 stats => 1,
122 dpavlin 707 lookup_coderef => sub {
123     my $rec = shift;
124     # store lookups
125 dpavlin 585 },
126 dpavlin 597 modify_records => {
127     900 => { '^a' => { ' : ' => '^b' } },
128     901 => { '*' => { '^b' => ' ; ' } },
129     },
130 dpavlin 636 modify_file => 'conf/modify/mapping.map',
131 dpavlin 761 save_row => sub {
132     my $a = shift;
133     $store->{ $a->{id} } = $a->{row};
134     },
135     load_row => sub {
136     my $a = shift;
137     return defined($store->{ $a->{id} }) &&
138     $store->{ $a->{id} };
139     },
140    
141 dpavlin 285 );
142    
143 dpavlin 624 By default, C<code_page> is assumed to be C<cp852>.
144 dpavlin 285
145 dpavlin 286 C<offset> is optional parametar to position at some offset before reading from database.
146 dpavlin 285
147 dpavlin 286 C<limit> is optional parametar to read just C<limit> records from database
148 dpavlin 285
149 dpavlin 506 C<stats> create optional report about usage of fields and subfields
150    
151 dpavlin 707 C<lookup_coderef> is closure to called to save data into lookups
152 dpavlin 585
153 dpavlin 597 C<modify_records> specify mapping from subfields to delimiters or from
154     delimiters to subfields, as well as oprations on fields (if subfield is
155     defined as C<*>.
156    
157 dpavlin 636 C<modify_file> is alternative for C<modify_records> above which preserves order and offers
158     (hopefully) simplier sintax than YAML or perl (see L</modify_file_regex>). This option
159     overrides C<modify_records> if both exists for same input.
160    
161 dpavlin 761 C<save_row> and C<load_row> are low-level implementation of store engine. Calling convention
162     is documented in example above.
163    
164 dpavlin 286 Returns size of database, regardless of C<offset> and C<limit>
165     parametars, see also C<size>.
166 dpavlin 285
167     =cut
168    
169     sub open {
170     my $self = shift;
171     my $arg = {@_};
172    
173     my $log = $self->_get_logger();
174    
175 dpavlin 585 $log->logconfess("lookup argument is not suppored any more. rewrite call to lookup_coderef") if ($arg->{lookup});
176     $log->logconfess("lookup_coderef must be CODE, not ",ref($arg->{lookup_coderef}))
177     if ($arg->{lookup_coderef} && ref($arg->{lookup_coderef}) ne 'CODE');
178    
179 dpavlin 707 $log->debug( $arg->{lookup_coderef} ? '' : 'not ', "using lookup_coderef");
180    
181 dpavlin 285 $log->logcroak("need path") if (! $arg->{'path'});
182 dpavlin 624 my $code_page = $arg->{'code_page'} || 'cp852';
183 dpavlin 285
184     # store data in object
185 dpavlin 292 $self->{'input_code_page'} = $code_page;
186 dpavlin 286 foreach my $v (qw/path offset limit/) {
187 dpavlin 285 $self->{$v} = $arg->{$v} if ($arg->{$v});
188     }
189    
190 dpavlin 761 if ($arg->{load_row} || $arg->{save_row}) {
191     $log->logconfess("save_row and load_row must be defined in pair and be CODE") unless (
192     ref($arg->{load_row}) eq 'CODE' &&
193     ref($arg->{save_row}) eq 'CODE'
194     );
195     $self->{load_row} = $arg->{load_row};
196     $self->{save_row} = $arg->{save_row};
197     $log->debug("using load_row and save_row instead of in-memory hash");
198     }
199    
200 dpavlin 416 my $filter_ref;
201 dpavlin 597 my $recode_regex;
202     my $recode_map;
203 dpavlin 416
204     if ($self->{recode}) {
205     my @r = split(/\s/, $self->{recode});
206     if ($#r % 2 != 1) {
207     $log->logwarn("recode needs even number of elements (some number of valid pairs)");
208     } else {
209     while (@r) {
210     my $from = shift @r;
211     my $to = shift @r;
212 dpavlin 597 $recode_map->{$from} = $to;
213 dpavlin 416 }
214    
215 dpavlin 597 $recode_regex = join '|' => keys %{ $recode_map };
216 dpavlin 416
217 dpavlin 597 $log->debug("using recode regex: $recode_regex");
218 dpavlin 416 }
219    
220     }
221    
222 dpavlin 636 my $rec_regex;
223     if (my $p = $arg->{modify_file}) {
224     $log->debug("using modify_file $p");
225     $rec_regex = $self->modify_file_regexps( $p );
226     } elsif (my $h = $arg->{modify_records}) {
227 dpavlin 771 $log->debug("using modify_records ", sub { dump( $h ) });
228 dpavlin 636 $rec_regex = $self->modify_record_regexps(%{ $h });
229     }
230 dpavlin 771 $log->debug("rec_regex: ", sub { dump($rec_regex) }) if ($rec_regex);
231 dpavlin 597
232 dpavlin 726 my $class = $self->{module} || $log->logconfess("can't get low-level module name!");
233    
234     my $ll_db = $class->new(
235 dpavlin 285 path => $arg->{path},
236 dpavlin 624 # filter => sub {
237     # my ($l,$f_nr) = @_;
238     # return unless defined($l);
239     # from_to($l, $code_page, $self->{'encoding'});
240     # $l =~ s/($recode_regex)/$recode_map->{$1}/g if ($recode_regex && $recode_map);
241     # return $l;
242     # },
243 dpavlin 523 %{ $arg },
244 dpavlin 285 );
245    
246 dpavlin 726 unless (defined($ll_db)) {
247 dpavlin 285 $log->logwarn("can't open database $arg->{path}, skipping...");
248     return;
249     }
250    
251 dpavlin 726 my $size = $ll_db->size;
252    
253 dpavlin 285 unless ($size) {
254     $log->logwarn("no records in database $arg->{path}, skipping...");
255     return;
256     }
257    
258 dpavlin 339 my $from_rec = 1;
259     my $to_rec = $size;
260 dpavlin 285
261 dpavlin 286 if (my $s = $self->{offset}) {
262 dpavlin 513 $log->debug("skipping to MFN $s");
263 dpavlin 339 $from_rec = $s;
264 dpavlin 285 } else {
265 dpavlin 339 $self->{offset} = $from_rec;
266 dpavlin 285 }
267    
268 dpavlin 286 if ($self->{limit}) {
269 dpavlin 301 $log->debug("limiting to ",$self->{limit}," records");
270 dpavlin 339 $to_rec = $from_rec + $self->{limit} - 1;
271     $to_rec = $size if ($to_rec > $size);
272 dpavlin 285 }
273    
274     # store size for later
275 dpavlin 339 $self->{size} = ($to_rec - $from_rec) ? ($to_rec - $from_rec + 1) : 0;
276 dpavlin 285
277 dpavlin 585 $log->info("processing $self->{size}/$size records [$from_rec-$to_rec] convert $code_page -> $self->{encoding}", $self->{stats} ? ' [stats]' : '');
278 dpavlin 285
279     # read database
280 dpavlin 339 for (my $pos = $from_rec; $pos <= $to_rec; $pos++) {
281 dpavlin 285
282 dpavlin 286 $log->debug("position: $pos\n");
283 dpavlin 285
284 dpavlin 726 my $rec = $ll_db->fetch_rec($pos, sub {
285 dpavlin 799 my ($l,$f_nr,$debug) = @_;
286 dpavlin 624 # return unless defined($l);
287     # return $l unless ($rec_regex && $f_nr);
288 dpavlin 285
289 dpavlin 818 return unless ( defined($l) && defined($f_nr) );
290    
291 dpavlin 800 warn "-=> $f_nr ## |$l|\n" if ($debug);
292 dpavlin 625 $log->debug("-=> $f_nr ## $l");
293    
294 dpavlin 624 # codepage conversion and recode_regex
295 dpavlin 626 from_to($l, $code_page, $self->{'encoding'});
296 dpavlin 624 $l =~ s/($recode_regex)/$recode_map->{$1}/g if ($recode_regex && $recode_map);
297    
298 dpavlin 619 # apply regexps
299     if ($rec_regex && defined($rec_regex->{$f_nr})) {
300     $log->logconfess("regexps->{$f_nr} must be ARRAY") if (ref($rec_regex->{$f_nr}) ne 'ARRAY');
301     my $c = 0;
302     foreach my $r (@{ $rec_regex->{$f_nr} }) {
303 dpavlin 626 my $old_l = $l;
304 dpavlin 800 $log->logconfess("expected regex in ", dump( $r )) unless defined($r->{regex});
305     eval '$l =~ ' . $r->{regex};
306 dpavlin 626 if ($old_l ne $l) {
307 dpavlin 800 my $d = "|$old_l| -> |$l| "; # . $r->{regex};
308     $d .= ' +' . $r->{line} . ' ' . $r->{file} if defined($r->{line});
309     $d .= ' ' . $r->{debug} if defined($r->{debug});
310     $log->debug("MODIFY $d");
311     warn "*** $d\n" if ($debug);
312    
313 dpavlin 626 }
314 dpavlin 619 $log->error("error applying regex: $r") if ($@);
315     }
316     }
317    
318 dpavlin 800 $log->debug("<=- $f_nr ## |$l|");
319 dpavlin 799 warn "<=- $f_nr ## $l\n" if ($debug);
320 dpavlin 619 return $l;
321     });
322    
323 dpavlin 771 $log->debug(sub { dump($rec) });
324 dpavlin 308
325 dpavlin 285 if (! $rec) {
326 dpavlin 286 $log->warn("record $pos empty? skipping...");
327 dpavlin 285 next;
328     }
329    
330     # store
331 dpavlin 761 if ($self->{save_row}) {
332     $self->{save_row}->({
333     id => $pos,
334     row => $rec,
335     });
336 dpavlin 285 } else {
337 dpavlin 286 $self->{data}->{$pos} = $rec;
338 dpavlin 285 }
339    
340     # create lookup
341 dpavlin 585 $arg->{'lookup_coderef'}->( $rec ) if ($rec && $arg->{'lookup_coderef'});
342 dpavlin 285
343 dpavlin 506 # update counters for statistics
344     if ($self->{stats}) {
345 dpavlin 593
346 dpavlin 619 # fetch clean record with regexpes applied for statistics
347 dpavlin 726 my $rec = $ll_db->fetch_rec($pos);
348 dpavlin 619
349 dpavlin 593 foreach my $fld (keys %{ $rec }) {
350 dpavlin 506 $self->{_stats}->{fld}->{ $fld }++;
351 dpavlin 593
352     $log->logdie("invalid record fild $fld, not ARRAY")
353     unless (ref($rec->{ $fld }) eq 'ARRAY');
354    
355     foreach my $row (@{ $rec->{$fld} }) {
356    
357     if (ref($row) eq 'HASH') {
358    
359     foreach my $sf (keys %{ $row }) {
360 dpavlin 619 next if ($sf eq 'subfields');
361 dpavlin 593 $self->{_stats}->{sf}->{ $fld }->{ $sf }->{count}++;
362     $self->{_stats}->{sf}->{ $fld }->{ $sf }->{repeatable}++
363     if (ref($row->{$sf}) eq 'ARRAY');
364 dpavlin 506 }
365 dpavlin 593
366     } else {
367     $self->{_stats}->{repeatable}->{ $fld }++;
368     }
369 dpavlin 506 }
370 dpavlin 593 }
371 dpavlin 506 }
372    
373 dpavlin 483 $self->progress_bar($pos,$to_rec) unless ($self->{no_progress_bar});
374 dpavlin 285
375     }
376    
377 dpavlin 286 $self->{pos} = -1;
378     $self->{last_pcnt} = 0;
379 dpavlin 285
380     # store max mfn and return it.
381 dpavlin 339 $self->{max_pos} = $to_rec;
382     $log->debug("max_pos: $to_rec");
383 dpavlin 285
384 dpavlin 757 # save for dump
385     $self->{ll_db} = $ll_db;
386    
387 dpavlin 285 return $size;
388     }
389    
390     =head2 fetch
391    
392     Fetch next record from database. It will also displays progress bar.
393    
394     my $rec = $isis->fetch;
395    
396     Record from this function should probably go to C<data_structure> for
397     normalisation.
398    
399     =cut
400    
401     sub fetch {
402     my $self = shift;
403    
404     my $log = $self->_get_logger();
405    
406 dpavlin 286 $log->logconfess("it seems that you didn't load database!") unless ($self->{pos});
407 dpavlin 285
408 dpavlin 286 if ($self->{pos} == -1) {
409     $self->{pos} = $self->{offset};
410 dpavlin 285 } else {
411 dpavlin 286 $self->{pos}++;
412 dpavlin 285 }
413    
414 dpavlin 286 my $mfn = $self->{pos};
415 dpavlin 285
416 dpavlin 286 if ($mfn > $self->{max_pos}) {
417     $self->{pos} = $self->{max_pos};
418 dpavlin 285 $log->debug("at EOF");
419     return;
420     }
421    
422 dpavlin 483 $self->progress_bar($mfn,$self->{max_pos}) unless ($self->{no_progress_bar});
423 dpavlin 285
424     my $rec;
425    
426 dpavlin 761 if ($self->{load_row}) {
427     $rec = $self->{load_row}->({ id => $mfn });
428 dpavlin 285 } else {
429 dpavlin 286 $rec = $self->{data}->{$mfn};
430 dpavlin 285 }
431    
432     $rec ||= 0E0;
433     }
434    
435     =head2 pos
436    
437     Returns current record number (MFN).
438    
439     print $isis->pos;
440    
441     First record in database has position 1.
442    
443     =cut
444    
445     sub pos {
446     my $self = shift;
447 dpavlin 286 return $self->{pos};
448 dpavlin 285 }
449    
450    
451     =head2 size
452    
453     Returns number of records in database
454    
455     print $isis->size;
456    
457     Result from this function can be used to loop through all records
458    
459     foreach my $mfn ( 1 ... $isis->size ) { ... }
460    
461 dpavlin 286 because it takes into account C<offset> and C<limit>.
462 dpavlin 285
463     =cut
464    
465     sub size {
466     my $self = shift;
467 dpavlin 286 return $self->{size};
468 dpavlin 285 }
469    
470     =head2 seek
471    
472     Seek to specified MFN in file.
473    
474     $isis->seek(42);
475    
476     First record in database has position 1.
477    
478     =cut
479    
480     sub seek {
481     my $self = shift;
482 dpavlin 793 my $pos = shift;
483 dpavlin 285
484     my $log = $self->_get_logger();
485    
486 dpavlin 797 $log->logconfess("called without pos") unless defined($pos);
487 dpavlin 793
488 dpavlin 285 if ($pos < 1) {
489     $log->warn("seek before first record");
490     $pos = 1;
491 dpavlin 286 } elsif ($pos > $self->{max_pos}) {
492 dpavlin 285 $log->warn("seek beyond last record");
493 dpavlin 286 $pos = $self->{max_pos};
494 dpavlin 285 }
495    
496 dpavlin 286 return $self->{pos} = (($pos - 1) || -1);
497 dpavlin 285 }
498    
499 dpavlin 506 =head2 stats
500 dpavlin 285
501 dpavlin 506 Dump statistics about field and subfield usage
502    
503 dpavlin 507 print $input->stats;
504 dpavlin 506
505     =cut
506    
507     sub stats {
508     my $self = shift;
509 dpavlin 507
510     my $log = $self->_get_logger();
511    
512     my $s = $self->{_stats};
513     if (! $s) {
514     $log->warn("called stats, but there is no statistics collected");
515     return;
516     }
517    
518     my $max_fld = 0;
519    
520     my $out = join("\n",
521     map {
522 dpavlin 844 my $f = $_;
523     die "no field in ", dump( $s->{fld} ) unless defined( $f );
524 dpavlin 507 my $v = $s->{fld}->{$f} || die "no s->{fld}->{$f}";
525     $max_fld = $v if ($v > $max_fld);
526    
527 dpavlin 519 my $o = sprintf("%4s %d ~", $f, $v);
528 dpavlin 507
529     if (defined($s->{sf}->{$f})) {
530     map {
531 dpavlin 593 $o .= sprintf(" %s:%d%s", $_,
532     $s->{sf}->{$f}->{$_}->{count},
533     $s->{sf}->{$f}->{$_}->{repeatable} ? '*' : '',
534     );
535 dpavlin 507 } sort keys %{ $s->{sf}->{$f} };
536     }
537    
538     if (my $v_r = $s->{repeatable}->{$f}) {
539     $o .= " ($v_r)" if ($v_r != $v);
540     }
541    
542     $o;
543 dpavlin 519 } sort { $a cmp $b } keys %{ $s->{fld} }
544 dpavlin 507 );
545    
546 dpavlin 771 $log->debug( sub { dump($s) } );
547 dpavlin 507
548     return $out;
549 dpavlin 506 }
550    
551 dpavlin 774 =head2 dump_ascii
552 dpavlin 652
553     Display humanly readable dump of record
554    
555     =cut
556    
557 dpavlin 774 sub dump_ascii {
558 dpavlin 652 my $self = shift;
559    
560 dpavlin 771 return unless $self->{ll_db};
561 dpavlin 652
562 dpavlin 771 if ($self->{ll_db}->can('dump_rec')) {
563 dpavlin 774 return $self->{ll_db}->dump_ascii( $self->{pos} );
564 dpavlin 771 } else {
565     return dump( $self->{ll_db}->fetch_rec( $self->{pos} ) );
566     }
567 dpavlin 652 }
568    
569 dpavlin 823 =head2 _get_regex
570 dpavlin 597
571 dpavlin 823 Helper function called which create regexps to be execute on code.
572 dpavlin 597
573 dpavlin 823 _get_regex( 900, 'regex:[0-9]+' ,'numbers' );
574     _get_regex( 900, '^b', ' : ^b' );
575 dpavlin 597
576 dpavlin 823 It supports perl regexps with C<regex:> prefix to from value and has
577     additional logic to skip empty subfields.
578    
579 dpavlin 597 =cut
580    
581 dpavlin 636 sub _get_regex {
582     my ($sf,$from,$to) = @_;
583 dpavlin 797
584     # protect /
585     $from =~ s!/!\\/!gs;
586     $to =~ s!/!\\/!gs;
587    
588 dpavlin 784 if ($from =~ m/^regex:(.+)$/) {
589     $from = $1;
590     } else {
591     $from = '\Q' . $from . '\E';
592     }
593 dpavlin 636 if ($sf =~ /^\^/) {
594 dpavlin 823 my $need_subfield_data = '*'; # no
595     # if from is also subfield, require some data in between
596     # to correctly skip empty subfields
597     $need_subfield_data = '+' if ($from =~ m/^\\Q\^/);
598 dpavlin 636 return
599 dpavlin 823 's/\Q'. $sf .'\E([^\^]' . $need_subfield_data . '?)'. $from .'([^\^]*?)/'. $sf .'$1'. $to .'$2/';
600 dpavlin 636 } else {
601     return
602 dpavlin 784 's/'. $from .'/'. $to .'/g';
603 dpavlin 636 }
604     }
605    
606 dpavlin 823
607     =head2 modify_record_regexps
608    
609     Generate hash with regexpes to be applied using L<filter>.
610    
611     my $regexpes = $input->modify_record_regexps(
612     900 => { '^a' => { ' : ' => '^b' } },
613     901 => { '*' => { '^b' => ' ; ' } },
614     );
615    
616     =cut
617    
618 dpavlin 597 sub modify_record_regexps {
619     my $self = shift;
620     my $modify_record = {@_};
621    
622     my $regexpes;
623    
624 dpavlin 634 my $log = $self->_get_logger();
625    
626 dpavlin 597 foreach my $f (keys %$modify_record) {
627 dpavlin 634 $log->debug("field: $f");
628    
629 dpavlin 597 foreach my $sf (keys %{ $modify_record->{$f} }) {
630 dpavlin 634 $log->debug("subfield: $sf");
631    
632 dpavlin 597 foreach my $from (keys %{ $modify_record->{$f}->{$sf} }) {
633     my $to = $modify_record->{$f}->{$sf}->{$from};
634     #die "no field?" unless defined($to);
635 dpavlin 800 my $d = "|$from| -> |$to|";
636     $log->debug("transform: $d");
637 dpavlin 597
638 dpavlin 636 my $regex = _get_regex($sf,$from,$to);
639 dpavlin 800 push @{ $regexpes->{$f} }, { regex => $regex, debug => $d };
640 dpavlin 636 $log->debug("regex: $regex");
641 dpavlin 597 }
642     }
643     }
644    
645     return $regexpes;
646     }
647    
648 dpavlin 636 =head2 modify_file_regexps
649    
650 dpavlin 799 Generate hash with regexpes to be applied using L<filter> from
651 dpavlin 636 pseudo hash/yaml format for regex mappings.
652    
653     It should be obvious:
654    
655     200
656     '^a'
657     ' : ' => '^e'
658     ' = ' => '^d'
659    
660     In field I<200> find C<'^a'> and then C<' : '>, and replace it with C<'^e'>.
661     In field I<200> find C<'^a'> and then C<' = '>, and replace it with C<'^d'>.
662    
663     my $regexpes = $input->modify_file_regexps( 'conf/modify/common.pl' );
664    
665     On undef path it will just return.
666    
667     =cut
668    
669     sub modify_file_regexps {
670     my $self = shift;
671    
672     my $modify_path = shift || return;
673    
674     my $log = $self->_get_logger();
675    
676     my $regexpes;
677    
678 dpavlin 697 CORE::open(my $fh, $modify_path) || $log->logdie("can't open modify file $modify_path: $!");
679 dpavlin 636
680     my ($f,$sf);
681    
682     while(<$fh>) {
683     chomp;
684     next if (/^#/ || /^\s*$/);
685    
686     if (/^\s*(\d+)\s*$/) {
687     $f = $1;
688     $log->debug("field: $f");
689     next;
690     } elsif (/^\s*'([^']*)'\s*$/) {
691     $sf = $1;
692     $log->die("can't define subfiled before field in: $_") unless ($f);
693     $log->debug("subfield: $sf");
694     } elsif (/^\s*'([^']*)'\s*=>\s*'([^']*)'\s*$/) {
695     my ($from,$to) = ($1, $2);
696    
697     $log->debug("transform: |$from| -> |$to|");
698    
699     my $regex = _get_regex($sf,$from,$to);
700 dpavlin 800 push @{ $regexpes->{$f} }, {
701     regex => $regex,
702     file => $modify_path,
703     line => $.,
704     };
705 dpavlin 636 $log->debug("regex: $regex");
706     }
707     }
708    
709     return $regexpes;
710     }
711    
712 dpavlin 3 =head1 AUTHOR
713    
714     Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
715    
716 dpavlin 1 =head1 COPYRIGHT & LICENSE
717    
718 dpavlin 599 Copyright 2005-2006 Dobrica Pavlinusic, All Rights Reserved.
719 dpavlin 1
720     This program is free software; you can redistribute it and/or modify it
721     under the same terms as Perl itself.
722    
723     =cut
724    
725     1; # End of WebPAC::Input

  ViewVC Help
Powered by ViewVC 1.1.26