1 |
package WebPAC; |
2 |
|
3 |
use warnings; |
4 |
use strict; |
5 |
|
6 |
use Carp; |
7 |
use Text::Iconv; |
8 |
use Config::IniFiles; |
9 |
use XML::Simple; |
10 |
use Template; |
11 |
|
12 |
use Data::Dumper; |
13 |
|
14 |
=head1 NAME |
15 |
|
16 |
WebPAC - base class for WebPAC |
17 |
|
18 |
=head1 DESCRIPTION |
19 |
|
20 |
This module implements methods used by WebPAC. |
21 |
|
22 |
=head1 METHODS |
23 |
|
24 |
=head2 new |
25 |
|
26 |
This will create new instance of WebPAC using configuration specified by C<config_file>. |
27 |
|
28 |
my $webpac = new WebPAC( |
29 |
config_file => 'name.conf', |
30 |
[code_page => 'ISO-8859-2',] |
31 |
); |
32 |
|
33 |
Default C<code_page> is C<ISO-8859-2>. |
34 |
|
35 |
It will also read configuration files |
36 |
C<global.conf> (used by indexer and Web font-end) |
37 |
and configuration file specified by C<config_file> |
38 |
which describes databases to be indexed. |
39 |
|
40 |
=cut |
41 |
|
42 |
# mapping between data type and tag which specify |
43 |
# format in XML file |
44 |
my %type2tag = ( |
45 |
'isis' => 'isis', |
46 |
# 'excel' => 'column', |
47 |
# 'marc' => 'marc', |
48 |
# 'feed' => 'feed' |
49 |
); |
50 |
|
51 |
sub new { |
52 |
my $class = shift; |
53 |
my $self = {@_}; |
54 |
bless($self, $class); |
55 |
|
56 |
# fill in default values |
57 |
# output codepage |
58 |
$self->{'code_page'} = 'ISO-8859-2' if (! $self->{'code_page'}); |
59 |
|
60 |
# |
61 |
# read global.conf |
62 |
# |
63 |
|
64 |
my $config = new Config::IniFiles( -file => 'global.conf' ) || croak "can't open 'global.conf'"; |
65 |
|
66 |
# read global config parametars |
67 |
foreach my $var (qw( |
68 |
dbi_dbd |
69 |
dbi_dsn |
70 |
dbi_user |
71 |
dbi_passwd |
72 |
show_progress |
73 |
my_unac_filter |
74 |
output_template |
75 |
)) { |
76 |
$self->{'global_config'}->{$var} = $config->val('global', $var); |
77 |
} |
78 |
|
79 |
# |
80 |
# read indexer config file |
81 |
# |
82 |
|
83 |
$self->{indexer_config_file} = new Config::IniFiles( -file => $self->{config_file} ) || croak "can't open '$self->{config_file}'"; |
84 |
|
85 |
# create UTF-8 convertor for import_xml files |
86 |
$self->{'utf2cp'} = Text::Iconv->new('UTF-8' ,$self->{'code_page'}); |
87 |
|
88 |
# create Template toolkit instance |
89 |
$self->{'tt'} = Template->new( |
90 |
INCLUDE_PATH => ($self->{'global_config_file'}->{'output_template'} || './output_template'), |
91 |
# FILTERS => { |
92 |
# 'foo' => \&foo_filter, |
93 |
# }, |
94 |
EVAL_PERL => 1, |
95 |
); |
96 |
|
97 |
return $self; |
98 |
} |
99 |
|
100 |
=head2 open_isis |
101 |
|
102 |
Open CDS/ISIS database using OpenIsis module and read all records to memory. |
103 |
|
104 |
$webpac->open_isis( |
105 |
filename => '/data/ISIS/ISIS', |
106 |
code_page => '852', |
107 |
limit_mfn => '500', |
108 |
lookup => [ ... ], |
109 |
); |
110 |
|
111 |
By default, ISIS code page is assumed to be C<852>. |
112 |
|
113 |
If optional parametar C<limit_mfn> is set, it will read just 500 records |
114 |
from database in example above. |
115 |
|
116 |
C<lookup> argument is an array of lookups to create. Each lookup must have C<key> and |
117 |
C<val>. Optional parametar C<eval> is perl code to evaluate before storing |
118 |
value in index. |
119 |
|
120 |
lookup => [ |
121 |
{ 'key' => 'd:v900', 'val' => 'v250^a' }, |
122 |
{ 'eval' => '"v901^a" eq "Podruèje"', |
123 |
'key' => 'pa:v561^4:v562^4:v461^1', |
124 |
'val' => 'v900' }, |
125 |
] |
126 |
|
127 |
Returns number of last record read into memory (size of database, really). |
128 |
|
129 |
=cut |
130 |
|
131 |
sub open_isis { |
132 |
my $self = shift; |
133 |
my $arg = {@_}; |
134 |
|
135 |
croak "need filename" if (! $arg->{'filename'}); |
136 |
my $code_page = $arg->{'code_page'} || '852'; |
137 |
|
138 |
use OpenIsis; |
139 |
|
140 |
#$self->{'isis_code_page'} = $code_page; |
141 |
|
142 |
# create Text::Iconv object |
143 |
my $cp = Text::Iconv->new($code_page,$self->{'code_page'}); |
144 |
|
145 |
print STDERR "reading ISIS database '",$arg->{'filename'},"'\n" if ($self->{'debug'}); |
146 |
|
147 |
my $isis_db = OpenIsis::open($arg->{'filename'}); |
148 |
|
149 |
my $maxmfn = OpenIsis::maxRowid( $isis_db ) || 1; |
150 |
|
151 |
$maxmfn = $self->{limit_mfn} if ($self->{limit_mfn}); |
152 |
|
153 |
print STDERR "processing $maxmfn records...\n" if ($self->{'debug'}); |
154 |
|
155 |
# read database |
156 |
for (my $mfn = 1; $mfn <= $maxmfn; $mfn++) { |
157 |
|
158 |
# read record |
159 |
my $row = OpenIsis::read( $isis_db, $mfn ); |
160 |
foreach my $k (keys %{$row}) { |
161 |
if ($k ne "mfn") { |
162 |
foreach my $l (@{$row->{$k}}) { |
163 |
$l = $cp->convert($l); |
164 |
# has subfields? |
165 |
my $val; |
166 |
if ($l =~ m/\^/) { |
167 |
foreach my $t (split(/\^/,$l)) { |
168 |
next if (! $t); |
169 |
$val->{substr($t,0,1)} = substr($t,1); |
170 |
} |
171 |
} else { |
172 |
$val = $l; |
173 |
} |
174 |
|
175 |
push @{$self->{'data'}->{$mfn}->{$k}}, $val; |
176 |
} |
177 |
} |
178 |
|
179 |
} |
180 |
|
181 |
# create lookup |
182 |
my $rec = $self->{'data'}->{$mfn}; |
183 |
$self->create_lookup($rec, @{$arg->{'lookup'}}); |
184 |
|
185 |
} |
186 |
|
187 |
$self->{'current_mfn'} = 1; |
188 |
|
189 |
# store max mfn and return it. |
190 |
return $self->{'max_mfn'} = $maxmfn; |
191 |
} |
192 |
|
193 |
=head2 fetch_rec |
194 |
|
195 |
Fetch next record from database. It will also display progress bar (once |
196 |
it's implemented, that is). |
197 |
|
198 |
my $rec = $webpac->fetch_rec; |
199 |
|
200 |
=cut |
201 |
|
202 |
sub fetch_rec { |
203 |
my $self = shift; |
204 |
|
205 |
my $mfn = $self->{'current_mfn'}++ || confess "it seems that you didn't load database!"; |
206 |
|
207 |
if ($mfn > $self->{'max_mfn'}) { |
208 |
$self->{'current_mfn'} = $self->{'max_mfn'}; |
209 |
return; |
210 |
} |
211 |
|
212 |
return $self->{'data'}->{$mfn}; |
213 |
} |
214 |
|
215 |
=head2 open_import_xml |
216 |
|
217 |
Read file from C<import_xml/> directory and parse it. |
218 |
|
219 |
$webpac->open_import_xml(type => 'isis'); |
220 |
|
221 |
=cut |
222 |
|
223 |
sub open_import_xml { |
224 |
my $self = shift; |
225 |
|
226 |
my $arg = {@_}; |
227 |
confess "need type to load file from import_xml/" if (! $arg->{'type'}); |
228 |
|
229 |
$self->{'type'} = $arg->{'type'}; |
230 |
|
231 |
my $type_base = $arg->{'type'}; |
232 |
$type_base =~ s/_.*$//g; |
233 |
|
234 |
$self->{'tag'} = $type2tag{$type_base}; |
235 |
|
236 |
print STDERR "using type '",$self->{'type'},"' tag <",$self->{'tag'},">\n" if ($self->{'debug'}); |
237 |
|
238 |
my $f = "./import_xml/".$self->{'type'}.".xml"; |
239 |
confess "import_xml file '$f' doesn't exist!" if (! -e "$f"); |
240 |
|
241 |
print STDERR "reading '$f'\n" if ($self->{'debug'}); |
242 |
|
243 |
$self->{'import_xml'} = XMLin($f, |
244 |
ForceArray => [ $self->{'tag'}, 'config', 'format' ], |
245 |
ForceContent => 1 |
246 |
); |
247 |
|
248 |
} |
249 |
|
250 |
=head2 create_lookup |
251 |
|
252 |
Create lookup from record using lookup definition. |
253 |
|
254 |
$self->create_lookup($rec, @lookups); |
255 |
|
256 |
Called internally by C<open_*> methods. |
257 |
|
258 |
=cut |
259 |
|
260 |
sub create_lookup { |
261 |
my $self = shift; |
262 |
|
263 |
my $rec = shift || confess "need record to create lookup"; |
264 |
confess("need HASH as first argument!") if ($rec !~ /HASH/o); |
265 |
|
266 |
foreach my $i (@_) { |
267 |
if ($i->{'eval'}) { |
268 |
my $eval = $self->fill_in($rec,$i->{'eval'}); |
269 |
my $key = $self->fill_in($rec,$i->{'key'}); |
270 |
my @val = $self->fill_in($rec,$i->{'val'}); |
271 |
if ($key && @val && eval $eval) { |
272 |
push @{$self->{'lookup'}->{$key}}, @val; |
273 |
} |
274 |
} else { |
275 |
my $key = $self->fill_in($rec,$i->{'key'}); |
276 |
my @val = $self->fill_in($rec,$i->{'val'}); |
277 |
if ($key && @val) { |
278 |
push @{$self->{'lookup'}->{$key}}, @val; |
279 |
} |
280 |
} |
281 |
} |
282 |
} |
283 |
|
284 |
=head2 get_data |
285 |
|
286 |
Returns value from record. |
287 |
|
288 |
my $text = $self->get_data(\$rec,$f,$sf,$i,\$found); |
289 |
|
290 |
Arguments are: |
291 |
record reference C<$rec>, |
292 |
field C<$f>, |
293 |
optional subfiled C<$sf>, |
294 |
index for repeatable values C<$i>. |
295 |
|
296 |
Optinal variable C<$found> will be incremeted if there |
297 |
is field. |
298 |
|
299 |
Returns value or empty string. |
300 |
|
301 |
=cut |
302 |
|
303 |
sub get_data { |
304 |
my $self = shift; |
305 |
|
306 |
my ($rec,$f,$sf,$i,$found) = @_; |
307 |
|
308 |
if ($$rec->{$f}) { |
309 |
return '' if (! $$rec->{$f}->[$i]); |
310 |
if ($sf && $$rec->{$f}->[$i]->{$sf}) { |
311 |
$$found++ if (defined($$found)); |
312 |
return $$rec->{$f}->[$i]->{$sf}; |
313 |
} elsif ($$rec->{$f}->[$i]) { |
314 |
$$found++ if (defined($$found)); |
315 |
# it still might have subfield, just |
316 |
# not specified, so we'll dump all |
317 |
if ($$rec->{$f}->[$i] =~ /HASH/o) { |
318 |
my $out; |
319 |
foreach my $k (keys %{$$rec->{$f}->[$i]}) { |
320 |
$out .= $$rec->{$f}->[$i]->{$k}." "; |
321 |
} |
322 |
return $out; |
323 |
} else { |
324 |
return $$rec->{$f}->[$i]; |
325 |
} |
326 |
} |
327 |
} else { |
328 |
return ''; |
329 |
} |
330 |
} |
331 |
|
332 |
=head2 fill_in |
333 |
|
334 |
Workhourse of all: takes record from in-memory structure of database and |
335 |
strings with placeholders and returns string or array of with substituted |
336 |
values from record. |
337 |
|
338 |
my $text = $webpac->fill_in($rec,'v250^a'); |
339 |
|
340 |
Optional argument is ordinal number for repeatable fields. By default, |
341 |
it's assume to be first repeatable field (fields are perl array, so first |
342 |
element is 0). |
343 |
Following example will read second value from repeatable field. |
344 |
|
345 |
my $text = $webpac->fill_in($rec,'Title: v250^a',1); |
346 |
|
347 |
This function B<does not> perform parsing of format to inteligenty skip |
348 |
delimiters before fields which aren't used. |
349 |
|
350 |
=cut |
351 |
|
352 |
# internal function to eval code |
353 |
sub _eval { |
354 |
my $self = shift; |
355 |
|
356 |
my $code = shift || return; |
357 |
no strict 'subs'; |
358 |
my $ret = eval $code; |
359 |
if ($@) { |
360 |
print STDERR "problem with eval code [$code]: $@\n"; |
361 |
} |
362 |
return $ret; |
363 |
} |
364 |
|
365 |
sub fill_in { |
366 |
my $self = shift; |
367 |
|
368 |
my $rec = shift || confess "need data record"; |
369 |
my $format = shift || confess "need format to parse"; |
370 |
# iteration (for repeatable fields) |
371 |
my $i = shift || 0; |
372 |
|
373 |
# FIXME remove for speedup? |
374 |
confess("need HASH as first argument!") if ($rec !~ /HASH/o); |
375 |
|
376 |
my $found = 0; |
377 |
|
378 |
my $eval_code; |
379 |
# remove eval{...} from beginning |
380 |
$eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s); |
381 |
|
382 |
# do actual replacement of placeholders |
383 |
$format =~ s/v(\d+)(?:\^(\w))*/$self->get_data(\$rec,$1,$2,$i,\$found)/ges; |
384 |
|
385 |
if ($found) { |
386 |
if ($eval_code) { |
387 |
my $eval = $self->fill_in($rec,$eval_code,$i); |
388 |
return if (! $self->_eval($eval)); |
389 |
} |
390 |
# do we have lookups? |
391 |
if ($format =~ /\[[^\[\]]+\]/o) { |
392 |
print "## probable lookup: $format\n"; |
393 |
return $self->lookup($format); |
394 |
} else { |
395 |
return $format; |
396 |
} |
397 |
} else { |
398 |
return; |
399 |
} |
400 |
} |
401 |
|
402 |
=head2 lookup |
403 |
|
404 |
Perform lookups on format supplied to it. |
405 |
|
406 |
my $text = $self->lookup('[v900]'); |
407 |
|
408 |
Lookups can be nested (like C<[d:[a:[v900]]]>). |
409 |
|
410 |
=cut |
411 |
|
412 |
sub lookup { |
413 |
my $self = shift; |
414 |
|
415 |
my $tmp = shift || confess "need format"; |
416 |
|
417 |
if ($tmp =~ /\[[^\[\]]+\]/o) { |
418 |
my @in = ( $tmp ); |
419 |
print "## lookup $tmp\n"; |
420 |
my @out; |
421 |
while (my $f = shift @in) { |
422 |
if ($f =~ /\[([^\[\]]+)\]/) { |
423 |
my $k = $1; |
424 |
if ($self->{'lookup'}->{$k}) { |
425 |
foreach my $nv (@{$self->{'lookup'}->{$k}}) { |
426 |
my $tmp2 = $f; |
427 |
$tmp2 =~ s/\[$k\]/$nv/g; |
428 |
push @in, $tmp2; |
429 |
} |
430 |
} else { |
431 |
undef $f; |
432 |
} |
433 |
} elsif ($f) { |
434 |
push @out, $f; |
435 |
} |
436 |
} |
437 |
return @out; |
438 |
} else { |
439 |
return $tmp; |
440 |
} |
441 |
} |
442 |
|
443 |
=head2 parse |
444 |
|
445 |
Perform smart parsing of string, skipping delimiters for fields which aren't |
446 |
defined. It can also eval code in format starting with C<eval{...}> and |
447 |
return output or nothing depending on eval code. |
448 |
|
449 |
my $text = $webpac->parse($rec,'eval{"v901^a" eq "Deskriptor"}descriptor: v250^a', $i); |
450 |
|
451 |
=cut |
452 |
|
453 |
sub parse { |
454 |
my $self = shift; |
455 |
|
456 |
my ($rec, $format_utf8, $i) = @_; |
457 |
|
458 |
return if (! $format_utf8); |
459 |
|
460 |
confess("need HASH as first argument!") if ($rec !~ /HASH/o); |
461 |
confess("need utf2cp Text::Iconv object!") if (! $self->{'utf2cp'}); |
462 |
|
463 |
$i = 0 if (! $i); |
464 |
|
465 |
my $format = $self->{'utf2cp'}->convert($format_utf8) || confess("can't convert '$format_utf8' from UTF-8 to ",$self->{'code_page'}); |
466 |
|
467 |
my @out; |
468 |
|
469 |
my $eval_code; |
470 |
# remove eval{...} from beginning |
471 |
$eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s); |
472 |
|
473 |
my $prefix; |
474 |
my $all_found=0; |
475 |
|
476 |
while ($format =~ s/^(.*?)v(\d+)(?:\^(\w))*//s) { |
477 |
|
478 |
my $del = $1 || ''; |
479 |
$prefix ||= $del if ($all_found == 0); |
480 |
|
481 |
my $found = 0; |
482 |
my $tmp = $self->get_data(\$rec,$2,$3,$i,\$found); |
483 |
|
484 |
if ($found) { |
485 |
push @out, $del; |
486 |
push @out, $tmp; |
487 |
$all_found += $found; |
488 |
} |
489 |
} |
490 |
|
491 |
return if (! $all_found); |
492 |
|
493 |
my $out = join('',@out) . $format; |
494 |
|
495 |
# add prefix if not there |
496 |
$out = $prefix . $out if ($out !~ m/^\Q$prefix\E/); |
497 |
|
498 |
if ($eval_code) { |
499 |
my $eval = $self->fill_in($rec,$eval_code,$i); |
500 |
return if (! $self->_eval($eval)); |
501 |
} |
502 |
|
503 |
return $out; |
504 |
} |
505 |
|
506 |
=head2 parse_to_arr |
507 |
|
508 |
Similar to C<parse>, but returns array of all repeatable fields |
509 |
|
510 |
my @arr = $webpac->parse_to_arr($rec,'v250^a'); |
511 |
|
512 |
=cut |
513 |
|
514 |
sub parse_to_arr { |
515 |
my $self = shift; |
516 |
|
517 |
my ($rec, $format_utf8) = @_; |
518 |
|
519 |
confess("need HASH as first argument!") if ($rec !~ /HASH/o); |
520 |
return if (! $format_utf8); |
521 |
|
522 |
my $i = 0; |
523 |
my @arr; |
524 |
|
525 |
while (my $v = $self->parse($rec,$format_utf8,$i++)) { |
526 |
push @arr, $v; |
527 |
} |
528 |
|
529 |
return @arr; |
530 |
} |
531 |
|
532 |
=head2 data_structure |
533 |
|
534 |
Create in-memory data structure which represents layout from C<import_xml>. |
535 |
It is used later to produce output. |
536 |
|
537 |
my @ds = $webpac->data_structure($rec); |
538 |
|
539 |
=cut |
540 |
|
541 |
# private method _sort_by_order |
542 |
# sort subrouting using order="" attribute |
543 |
sub _sort_by_order { |
544 |
my $self = shift; |
545 |
|
546 |
my $va = $self->{'import_xml'}->{'indexer'}->{$a}->{'order'} || |
547 |
$self->{'import_xml'}->{'indexer'}->{$a}; |
548 |
my $vb = $self->{'import_xml'}->{'indexer'}->{$b}->{'order'} || |
549 |
$self->{'import_xml'}->{'indexer'}->{$b}; |
550 |
|
551 |
return $va <=> $vb; |
552 |
} |
553 |
|
554 |
sub data_structure { |
555 |
my $self = shift; |
556 |
|
557 |
my $rec = shift; |
558 |
confess("need HASH as first argument!") if ($rec !~ /HASH/o); |
559 |
|
560 |
my @sorted_tags; |
561 |
if ($self->{tags_by_order}) { |
562 |
@sorted_tags = @{$self->{tags_by_order}}; |
563 |
} else { |
564 |
@sorted_tags = sort { $self->_sort_by_order } keys %{$self->{'import_xml'}->{'indexer'}}; |
565 |
$self->{tags_by_order} = \@sorted_tags; |
566 |
} |
567 |
|
568 |
my @ds; |
569 |
|
570 |
foreach my $field (@sorted_tags) { |
571 |
|
572 |
my $row; |
573 |
|
574 |
#print "field $field [",$self->{'tag'},"] = ",Dumper($self->{'import_xml'}->{'indexer'}->{$field}->{$self->{'tag'}}); |
575 |
|
576 |
foreach my $tag (@{$self->{'import_xml'}->{'indexer'}->{$field}->{$self->{'tag'}}}) { |
577 |
my @v = $self->parse_to_arr($rec,$tag->{'content'}); |
578 |
|
579 |
next if (! @v); |
580 |
|
581 |
# does tag have type? |
582 |
if ($tag->{'type'}) { |
583 |
push @{$row->{$tag->{'type'}}}, @v; |
584 |
} else { |
585 |
push @{$row->{'display'}}, @v; |
586 |
push @{$row->{'swish'}}, @v; |
587 |
} |
588 |
} |
589 |
|
590 |
if ($row) { |
591 |
$row->{'tag'} = $field; |
592 |
push @ds, $row; |
593 |
} |
594 |
|
595 |
} |
596 |
|
597 |
return @ds; |
598 |
|
599 |
} |
600 |
|
601 |
=head2 output |
602 |
|
603 |
Create output from in-memory data structure using Template Toolkit template. |
604 |
|
605 |
my $text = $webpac->output( template => 'text.tt', data => @ds ); |
606 |
|
607 |
=cut |
608 |
|
609 |
sub output { |
610 |
my $self = shift; |
611 |
|
612 |
my $args = {@_}; |
613 |
|
614 |
confess("need template name") if (! $args->{'template'}); |
615 |
confess("need data array") if (! $args->{'data'}); |
616 |
|
617 |
my $out; |
618 |
|
619 |
$self->{'tt'}->process( |
620 |
$args->{'template'}, |
621 |
$args, |
622 |
\$out |
623 |
) || confess $self->{'tt'}->error(); |
624 |
|
625 |
return $out; |
626 |
} |
627 |
|
628 |
1; |