1 | ###########################################################################
|
---|
2 | #
|
---|
3 | # doc.pm --
|
---|
4 | # A component of the Greenstone digital library software
|
---|
5 | # from the New Zealand Digital Library Project at the
|
---|
6 | # University of Waikato, New Zealand.
|
---|
7 | #
|
---|
8 | # Copyright (C) 1999 New Zealand Digital Library Project
|
---|
9 | #
|
---|
10 | # This program is free software; you can redistribute it and/or modify
|
---|
11 | # it under the terms of the GNU General Public License as published by
|
---|
12 | # the Free Software Foundation; either version 2 of the License, or
|
---|
13 | # (at your option) any later version.
|
---|
14 | #
|
---|
15 | # This program is distributed in the hope that it will be useful,
|
---|
16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
18 | # GNU General Public License for more details.
|
---|
19 | #
|
---|
20 | # You should have received a copy of the GNU General Public License
|
---|
21 | # along with this program; if not, write to the Free Software
|
---|
22 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
---|
23 | #
|
---|
24 | ###########################################################################
|
---|
25 |
|
---|
26 | # base class to hold documents
|
---|
27 |
|
---|
28 | package doc;
|
---|
29 |
|
---|
30 | BEGIN {
|
---|
31 | die "GSDLHOME not set\n" unless defined $ENV{'GSDLHOME'};
|
---|
32 | unshift (@INC, "$ENV{'GSDLHOME'}/perllib/dynamic/lib/site_perl/5.005/i686-linux");
|
---|
33 | }
|
---|
34 |
|
---|
35 | use unicode;
|
---|
36 | use util;
|
---|
37 | use ghtml;
|
---|
38 | ##use hashdoc;
|
---|
39 |
|
---|
40 | # the document type may be indexed_doc, nonindexed_doc, or
|
---|
41 | # classification
|
---|
42 |
|
---|
43 | my $OIDcount = 0;
|
---|
44 |
|
---|
45 | sub new {
|
---|
46 | my $class = shift (@_);
|
---|
47 | my ($source_filename, $doc_type) = @_;
|
---|
48 |
|
---|
49 | my $self = bless {'associated_files'=>[],
|
---|
50 | 'subsection_order'=>[],
|
---|
51 | 'next_subsection'=>1,
|
---|
52 | 'subsections'=>{},
|
---|
53 | 'metadata'=>[],
|
---|
54 | 'text'=>"",
|
---|
55 | 'OIDtype'=>"hash"}, $class;
|
---|
56 |
|
---|
57 | $self->set_source_filename ($source_filename) if defined $source_filename;
|
---|
58 | $self->set_doc_type ($doc_type) if defined $doc_type;
|
---|
59 |
|
---|
60 | return $self;
|
---|
61 | }
|
---|
62 |
|
---|
63 | # clone the $self object
|
---|
64 | sub duplicate {
|
---|
65 | my $self = shift (@_);
|
---|
66 |
|
---|
67 | my $newobj = {};
|
---|
68 |
|
---|
69 | foreach $k (keys %$self) {
|
---|
70 | $newobj->{$k} = &clone ($self->{$k});
|
---|
71 | }
|
---|
72 |
|
---|
73 | bless $newobj, ref($self);
|
---|
74 | return $newobj;
|
---|
75 | }
|
---|
76 |
|
---|
77 | sub clone {
|
---|
78 | my ($from) = @_;
|
---|
79 | my $type = ref ($from);
|
---|
80 |
|
---|
81 | if ($type eq "HASH") {
|
---|
82 | my $to = {};
|
---|
83 | foreach $key (keys %$from) {
|
---|
84 | $to->{$key} = &clone ($from->{$key});
|
---|
85 | }
|
---|
86 | return $to;
|
---|
87 | } elsif ($type eq "ARRAY") {
|
---|
88 | my $to = [];
|
---|
89 | foreach $v (@$from) {
|
---|
90 | push (@$to, &clone ($v));
|
---|
91 | }
|
---|
92 | return $to;
|
---|
93 | } else {
|
---|
94 | return $from;
|
---|
95 | }
|
---|
96 | }
|
---|
97 |
|
---|
98 | sub set_OIDtype {
|
---|
99 | my $self = shift (@_);
|
---|
100 | my ($type) = @_;
|
---|
101 |
|
---|
102 | if ($type eq "incremental") {
|
---|
103 | $self->{'OIDtype'} = $type;
|
---|
104 | } else {
|
---|
105 | $self->{'OIDtype'} = "hash";
|
---|
106 | }
|
---|
107 | }
|
---|
108 |
|
---|
109 | sub set_source_filename {
|
---|
110 | my $self = shift (@_);
|
---|
111 | my ($source_filename) = @_;
|
---|
112 |
|
---|
113 | $self->set_metadata_element ($self->get_top_section(),
|
---|
114 | "gsdlsourcefilename",
|
---|
115 | $source_filename);
|
---|
116 | }
|
---|
117 |
|
---|
118 | # returns the source_filename as it was provided
|
---|
119 | sub get_source_filename {
|
---|
120 | my $self = shift (@_);
|
---|
121 |
|
---|
122 | return $self->get_metadata_element ($self->get_top_section(), "gsdlsourcefilename");
|
---|
123 | }
|
---|
124 |
|
---|
125 | sub set_doc_type {
|
---|
126 | my $self = shift (@_);
|
---|
127 | my ($doc_type) = @_;
|
---|
128 |
|
---|
129 | $self->set_metadata_element ($self->get_top_section(),
|
---|
130 | "gsdldoctype",
|
---|
131 | $doc_type);
|
---|
132 | }
|
---|
133 |
|
---|
134 | # returns the source_filename as it was provided
|
---|
135 | # the default of "indexed_doc" is used if no document
|
---|
136 | # type was provided
|
---|
137 | sub get_doc_type {
|
---|
138 | my $self = shift (@_);
|
---|
139 |
|
---|
140 | my $doc_type = $self->get_metadata_element ($self->get_top_section(), "gsdldoctype");
|
---|
141 | return $doc_type if (defined $doc_type);
|
---|
142 | return "indexed_doc";
|
---|
143 | }
|
---|
144 |
|
---|
145 | sub _escape_text {
|
---|
146 | my ($text) = @_;
|
---|
147 |
|
---|
148 | # special characters in the gml encoding
|
---|
149 | $text =~ s/&/&/g; # this has to be first...
|
---|
150 | $text =~ s/</</g;
|
---|
151 | $text =~ s/>/>/g;
|
---|
152 | $text =~ s/\"/"/g;
|
---|
153 |
|
---|
154 | return $text;
|
---|
155 | }
|
---|
156 |
|
---|
157 |
|
---|
158 | sub buffer_section_gml {
|
---|
159 | my $self = shift (@_);
|
---|
160 | my ($section, $suppress_subject_info) = @_;
|
---|
161 |
|
---|
162 | $suppress_subject_info = 0 unless defined $suppress_subject_info;
|
---|
163 | my ($all_text,$data, $subsection);
|
---|
164 |
|
---|
165 | my $section_ptr = $self->_lookup_section ($section);
|
---|
166 | my ($section_num) = $section =~ /(\d+)$/;
|
---|
167 |
|
---|
168 | return "" unless defined $section_ptr;
|
---|
169 |
|
---|
170 | # output the section header (including the section number
|
---|
171 | # and metadata)
|
---|
172 |
|
---|
173 | $all_text = "<gsdlsection";
|
---|
174 | $all_text .= " gsdlnum=\"$section_num\"" if defined $section_num;
|
---|
175 | foreach $data (@{$section_ptr->{'metadata'}}) {
|
---|
176 | $all_text .= " $data->[0]=\"" . &_escape_text($data->[1]) . "\""
|
---|
177 | unless $suppress_subject_info && $data->[0] eq "Subject";
|
---|
178 | }
|
---|
179 | $all_text .= ">";
|
---|
180 |
|
---|
181 | # output the text
|
---|
182 | $all_text .= &_escape_text($section_ptr->{'text'});
|
---|
183 |
|
---|
184 | # output all the subsections
|
---|
185 | foreach $subsection (@{$section_ptr->{'subsection_order'}}) {
|
---|
186 | $all_text .= $self->buffer_section_gml("$section.$subsection",
|
---|
187 | $suppress_subject_info);
|
---|
188 | }
|
---|
189 |
|
---|
190 | # output the closing tag
|
---|
191 | $all_text .= "</gsdlsection>\n";
|
---|
192 |
|
---|
193 | return $all_text;
|
---|
194 | }
|
---|
195 |
|
---|
196 |
|
---|
197 | sub buffer_section_xml {
|
---|
198 | my $self = shift (@_);
|
---|
199 | my ($section, $dtd_metadata, $suppress_subject_info) = @_;
|
---|
200 |
|
---|
201 | $suppress_subject_info = 0 unless defined $suppress_subject_info;
|
---|
202 | my ($all_text, $data, $subsection);
|
---|
203 |
|
---|
204 | my $section_ptr = $self->_lookup_section ($section);
|
---|
205 | my ($section_num) = $section =~ /(\d+)$/;
|
---|
206 |
|
---|
207 | return "" unless defined $section_ptr;
|
---|
208 |
|
---|
209 | # output the section header (including the section number
|
---|
210 | # and metadata)
|
---|
211 |
|
---|
212 | $all_text .= "<gsdlsection";
|
---|
213 | $all_text .= " gsdlnum=\"$section_num\"" if defined $section_num;
|
---|
214 | $all_text .= ">\n";
|
---|
215 |
|
---|
216 | $all_text .= " <metadata>\n";
|
---|
217 |
|
---|
218 | # output metadata
|
---|
219 | foreach $data (@{$section_ptr->{'metadata'}}) {
|
---|
220 | my $tag_name = $data->[0];
|
---|
221 |
|
---|
222 | # a tagname beginning with '/' (like </srclink>) will cause problems
|
---|
223 | # so we'll escape any leading '/'
|
---|
224 | $tag_name =~ s/^\//&\#47;/;
|
---|
225 |
|
---|
226 | my $tag_value = &_escape_text($data->[1]);
|
---|
227 |
|
---|
228 | unless ($suppress_subject_info && $tag_name eq "Subject")
|
---|
229 | {
|
---|
230 | if (defined $dtd_metadata)
|
---|
231 | {
|
---|
232 | $dtd_metadata->{$tag_name}++;
|
---|
233 | }
|
---|
234 |
|
---|
235 | $all_text .= " <$tag_name>$tag_value</$tag_name>\n";
|
---|
236 | }
|
---|
237 | }
|
---|
238 |
|
---|
239 | $all_text .= " </metadata>\n";
|
---|
240 |
|
---|
241 | # output the text
|
---|
242 | $all_text .= &_escape_text($section_ptr->{'text'});
|
---|
243 |
|
---|
244 | # output all the subsections
|
---|
245 | foreach $subsection (@{$section_ptr->{'subsection_order'}}) {
|
---|
246 | $all_text .= $self->buffer_section_xml("$section.$subsection",
|
---|
247 | $dtd_metadata,
|
---|
248 | $suppress_subject_info);
|
---|
249 | }
|
---|
250 |
|
---|
251 | # output the closing tag
|
---|
252 | $all_text .= "</gsdlsection>\n";
|
---|
253 |
|
---|
254 | return $all_text;
|
---|
255 | }
|
---|
256 |
|
---|
257 | sub output_section {
|
---|
258 | my $self = shift (@_);
|
---|
259 | my ($handle, $section, $colname, $dtd_metadata,
|
---|
260 | $suppress_subject_info) = @_;
|
---|
261 |
|
---|
262 | my $all_text = $self->buffer_section_xml($section, $dtd_metadata,
|
---|
263 | $suppress_subject_info);
|
---|
264 |
|
---|
265 | # xml header
|
---|
266 | if (defined $collection)
|
---|
267 | {
|
---|
268 | my $xml_head
|
---|
269 | = '<? xml version="1.0" standalone="no" encoding="UTF-8" ?>';
|
---|
270 | $xml_head .= "\n<!DOCTYPE gsdl:$colname SYSTEM \"$colname.dtd\">\n";
|
---|
271 | $all_text = $xml_head.$all_text;
|
---|
272 | }
|
---|
273 |
|
---|
274 | print $handle $all_text;
|
---|
275 | }
|
---|
276 |
|
---|
277 | # look up the reference to the a particular section
|
---|
278 | sub _lookup_section {
|
---|
279 | my $self = shift (@_);
|
---|
280 | my ($section) = @_;
|
---|
281 |
|
---|
282 | my ($num);
|
---|
283 | my $sectionref = $self;
|
---|
284 |
|
---|
285 | while (defined $section && $section ne "") {
|
---|
286 | ($num, $section) = $section =~ /^\.?(\d+)(.*)$/;
|
---|
287 | $num =~ s/^0+(\d)/$1/; # remove leading 0s
|
---|
288 | $section = "" unless defined $section;
|
---|
289 |
|
---|
290 | if (defined $num && defined $sectionref->{'subsections'}->{$num}) {
|
---|
291 | $sectionref = $sectionref->{'subsections'}->{$num};
|
---|
292 | } else {
|
---|
293 | return undef;
|
---|
294 | }
|
---|
295 | }
|
---|
296 |
|
---|
297 | return $sectionref;
|
---|
298 | }
|
---|
299 |
|
---|
300 | # calculate OID by hashing the contents of the document
|
---|
301 | sub _calc_OID {
|
---|
302 | my $self = shift (@_);
|
---|
303 | my ($filename) = @_;
|
---|
304 |
|
---|
305 | my $osexe = &util::get_os_exe();
|
---|
306 |
|
---|
307 | my $hashfile_exe = &util::filename_cat($ENV{'GSDLHOME'},"bin",
|
---|
308 | $ENV{'GSDLOS'},"hashfile$osexe");
|
---|
309 | my $result = "NULL";
|
---|
310 |
|
---|
311 | if (-e "$hashfile_exe") {
|
---|
312 | # $result = `\"$hashfile_exe\" \"$filename\"`;
|
---|
313 | $result = `hashfile$osexe \"$filename\"`;
|
---|
314 | ($result) = $result =~ /:\s*([0-9a-f]+)/i;
|
---|
315 |
|
---|
316 | } else {
|
---|
317 | print STDERR "doc::_calc_OID $hashfile_exe could not be found\n";
|
---|
318 | }
|
---|
319 |
|
---|
320 | return "HASH$result";
|
---|
321 | }
|
---|
322 |
|
---|
323 | # methods dealing with OID, not groups of them.
|
---|
324 |
|
---|
325 | # if $OID is not provided one is calculated
|
---|
326 | sub set_OID {
|
---|
327 | my $self = shift (@_);
|
---|
328 | my ($OID) = @_;
|
---|
329 |
|
---|
330 | # if an OID wasn't provided claculate one
|
---|
331 | if (!defined $OID) {
|
---|
332 | $OID = "NULL";
|
---|
333 |
|
---|
334 | if ($self->{'OIDtype'} eq "incremental") {
|
---|
335 | $OID = "D" . $OIDcount;
|
---|
336 | $OIDcount ++;
|
---|
337 |
|
---|
338 | } else {
|
---|
339 | # "hash" OID - feed file to hashfile.exe
|
---|
340 | my $filename = $self->get_source_filename();
|
---|
341 | if (defined($filename) && -e $filename) {
|
---|
342 |
|
---|
343 | $OID = $self->_calc_OID ($filename);
|
---|
344 |
|
---|
345 | } else {
|
---|
346 | $filename = &util::get_tmp_filename();
|
---|
347 | if (!open (OUTFILE, ">$filename")) {
|
---|
348 | print STDERR "doc::set_OID could not write to $filename\n";
|
---|
349 | } else {
|
---|
350 | $self->output_section('OUTFILE', $self->get_top_section(),
|
---|
351 | undef, 1);
|
---|
352 | close (OUTFILE);
|
---|
353 | }
|
---|
354 |
|
---|
355 | $OID = $self->_calc_OID ($filename);
|
---|
356 | &util::rm ($filename);
|
---|
357 | }
|
---|
358 | }
|
---|
359 | }
|
---|
360 | $self->set_metadata_element ($self->get_top_section(), "Identifier", $OID);
|
---|
361 | }
|
---|
362 |
|
---|
363 | # this uses hashdoc (embedded c thingy) which is faster but still
|
---|
364 | # needs a little work to be suffiently stable
|
---|
365 | sub ___set_OID {
|
---|
366 | my $self = shift (@_);
|
---|
367 | my ($OID) = @_;
|
---|
368 |
|
---|
369 | # if an OID wasn't provided then calculate hash value based on document
|
---|
370 | if (!defined $OID)
|
---|
371 | {
|
---|
372 | my $hash_text = $self->buffer_section_gml($self->get_top_section(),
|
---|
373 | undef, 1);
|
---|
374 | my $hash_len = length($hash_text);
|
---|
375 |
|
---|
376 | $OID = &hashdoc::buffer($hash_text,$hash_len);
|
---|
377 | }
|
---|
378 |
|
---|
379 | $self->set_metadata_element ($self->get_top_section(), "Identifier", $OID);
|
---|
380 | }
|
---|
381 |
|
---|
382 | # returns the OID for this document
|
---|
383 | sub get_OID {
|
---|
384 | my $self = shift (@_);
|
---|
385 | my $OID = $self->get_metadata_element ($self->get_top_section(), "Identifier");
|
---|
386 | return $OID if (defined $OID);
|
---|
387 | return "NULL";
|
---|
388 | }
|
---|
389 |
|
---|
390 | sub delete_OID {
|
---|
391 | my $self = shift (@_);
|
---|
392 |
|
---|
393 | $self->set_metadata_element ($self->get_top_section(), "Identifier", "NULL");
|
---|
394 | }
|
---|
395 |
|
---|
396 |
|
---|
397 | # methods for manipulating section names
|
---|
398 |
|
---|
399 | # returns the name of the top-most section (the top
|
---|
400 | # level of the document
|
---|
401 | sub get_top_section {
|
---|
402 | my $self = shift (@_);
|
---|
403 |
|
---|
404 | return "";
|
---|
405 | }
|
---|
406 |
|
---|
407 | # returns a section
|
---|
408 | sub get_parent_section {
|
---|
409 | my $self = shift (@_);
|
---|
410 | my ($section) = @_;
|
---|
411 |
|
---|
412 | $section =~ s/(^|\.)\d+$//;
|
---|
413 |
|
---|
414 | return $section;
|
---|
415 | }
|
---|
416 |
|
---|
417 | # returns the first child section (or the end child
|
---|
418 | # if there isn't any)
|
---|
419 | sub get_begin_child {
|
---|
420 | my $self = shift (@_);
|
---|
421 | my ($section) = @_;
|
---|
422 |
|
---|
423 | my $section_ptr = $self->_lookup_section($section);
|
---|
424 | return "" unless defined $section_ptr;
|
---|
425 |
|
---|
426 | if (defined $section_ptr->{'subsection_order'}->[0]) {
|
---|
427 | return "$section.$section_ptr->{'subsection_order'}->[0]";
|
---|
428 | }
|
---|
429 |
|
---|
430 | return $self->get_end_child ($section);
|
---|
431 | }
|
---|
432 |
|
---|
433 | # returns the next child of a parent section
|
---|
434 | sub get_next_child {
|
---|
435 | my $self = shift (@_);
|
---|
436 | my ($section) = @_;
|
---|
437 |
|
---|
438 | my $parent_section = $self->get_parent_section($section);
|
---|
439 | my $parent_section_ptr = $self->_lookup_section($parent_section);
|
---|
440 | return undef unless defined $parent_section_ptr;
|
---|
441 |
|
---|
442 | my ($section_num) = $section =~ /(\d+)$/;
|
---|
443 | return undef unless defined $section_num;
|
---|
444 |
|
---|
445 | my $i = 0;
|
---|
446 | my $section_order = $parent_section_ptr->{'subsection_order'};
|
---|
447 | while ($i < scalar(@$section_order)) {
|
---|
448 | last if $section_order->[$i] eq $section_num;
|
---|
449 | $i++;
|
---|
450 | }
|
---|
451 |
|
---|
452 | $i++; # the next child
|
---|
453 | if ($i < scalar(@$section_order)) {
|
---|
454 | return $section_order->[$i] if $parent_section eq "";
|
---|
455 | return "$parent_section.$section_order->[$i]";
|
---|
456 | }
|
---|
457 |
|
---|
458 | # no more sections in this level
|
---|
459 | return undef;
|
---|
460 | }
|
---|
461 |
|
---|
462 | # returns a reference to a list of children
|
---|
463 | sub get_children {
|
---|
464 | my $self = shift (@_);
|
---|
465 | my ($section) = @_;
|
---|
466 |
|
---|
467 | my $section_ptr = $self->_lookup_section($section);
|
---|
468 | return [] unless defined $section_ptr;
|
---|
469 |
|
---|
470 | my @children = @{$section_ptr->{'subsection_order'}};
|
---|
471 |
|
---|
472 | map {$_ = "$section.$_"; $_ =~ s/^\.+//;} @children;
|
---|
473 | return \@children;
|
---|
474 | }
|
---|
475 |
|
---|
476 | # returns the child section one past the last one (which
|
---|
477 | # is coded as "0")
|
---|
478 | sub get_end_child {
|
---|
479 | my $self = shift (@_);
|
---|
480 | my ($section) = @_;
|
---|
481 |
|
---|
482 | return $section . ".0" unless $section eq "";
|
---|
483 | return "0";
|
---|
484 | }
|
---|
485 |
|
---|
486 | # returns the next section in book order
|
---|
487 | sub get_next_section {
|
---|
488 | my $self = shift (@_);
|
---|
489 | my ($section) = @_;
|
---|
490 |
|
---|
491 | return undef unless defined $section;
|
---|
492 |
|
---|
493 | my $section_ptr = $self->_lookup_section($section);
|
---|
494 | return undef unless defined $section_ptr;
|
---|
495 |
|
---|
496 | # first try to find first child
|
---|
497 | if (defined $section_ptr->{'subsection_order'}->[0]) {
|
---|
498 | return $section_ptr->{'subsection_order'}->[0] if ($section eq "");
|
---|
499 | return "$section.$section_ptr->{'subsection_order'}->[0]";
|
---|
500 | }
|
---|
501 |
|
---|
502 | do {
|
---|
503 | # try to find sibling
|
---|
504 | my $next_child = $self->get_next_child ($section);
|
---|
505 | return $next_child if (defined $next_child);
|
---|
506 |
|
---|
507 | # move up one level
|
---|
508 | $section = $self->get_parent_section ($section);
|
---|
509 | } while $section =~ /\d/;
|
---|
510 |
|
---|
511 | return undef;
|
---|
512 | }
|
---|
513 |
|
---|
514 | sub is_leaf_section {
|
---|
515 | my $self = shift (@_);
|
---|
516 | my ($section) = @_;
|
---|
517 |
|
---|
518 | my $section_ptr = $self->_lookup_section($section);
|
---|
519 | return 1 unless defined $section_ptr;
|
---|
520 |
|
---|
521 | return (scalar (@{$section_ptr->{'subsection_order'}}) == 0);
|
---|
522 | }
|
---|
523 |
|
---|
524 | # methods for dealing with sections
|
---|
525 |
|
---|
526 | # returns the name of the inserted section
|
---|
527 | sub insert_section {
|
---|
528 | my $self = shift (@_);
|
---|
529 | my ($before_section) = @_;
|
---|
530 |
|
---|
531 | # get the child to insert before and its parent section
|
---|
532 | my $parent_section = "";
|
---|
533 | my $before_child = "0";
|
---|
534 | my @before_section = split (/\./, $before_section);
|
---|
535 | if (scalar(@before_section) > 0) {
|
---|
536 | $before_child = pop (@before_section);
|
---|
537 | $parent_section = join (".", @before_section);
|
---|
538 | }
|
---|
539 |
|
---|
540 | my $parent_section_ptr = $self->_lookup_section($parent_section);
|
---|
541 | if (!defined $parent_section_ptr) {
|
---|
542 | print STDERR "doc::insert_section couldn't find parent section " .
|
---|
543 | "$parent_section\n";
|
---|
544 | return;
|
---|
545 | }
|
---|
546 |
|
---|
547 | # get the next section number
|
---|
548 | my $section_num = $parent_section_ptr->{'next_subsection'}++;
|
---|
549 |
|
---|
550 | my $i = 0;
|
---|
551 | while ($i < scalar(@{$parent_section_ptr->{'subsection_order'}}) &&
|
---|
552 | $parent_section_ptr->{'subsection_order'}->[$i] ne $before_child) {
|
---|
553 | $i++;
|
---|
554 | }
|
---|
555 |
|
---|
556 | # insert the section number into the order list
|
---|
557 | splice (@{$parent_section_ptr->{'subsection_order'}}, $i, 0, $section_num);
|
---|
558 |
|
---|
559 | # add this section to the parent section
|
---|
560 | my $section_ptr = {'subsection_order'=>[],
|
---|
561 | 'next_subsection'=>1,
|
---|
562 | 'subsections'=>{},
|
---|
563 | 'metadata'=>[],
|
---|
564 | 'text'=>""};
|
---|
565 | $parent_section_ptr->{'subsections'}->{$section_num} = $section_ptr;
|
---|
566 |
|
---|
567 | # work out the full section number
|
---|
568 | my $section = $parent_section;
|
---|
569 | $section .= "." unless $section eq "";
|
---|
570 | $section .= $section_num;
|
---|
571 |
|
---|
572 | return $section;
|
---|
573 | }
|
---|
574 |
|
---|
575 | # creates a pre-named section
|
---|
576 | sub create_named_section {
|
---|
577 | my $self = shift (@_);
|
---|
578 | my ($mastersection) = @_;
|
---|
579 |
|
---|
580 | my ($num);
|
---|
581 | my $section = $mastersection;
|
---|
582 | my $sectionref = $self;
|
---|
583 |
|
---|
584 | while ($section ne "") {
|
---|
585 | ($num, $section) = $section =~ /^\.?(\d+)(.*)$/;
|
---|
586 | $num =~ s/^0+(\d)/$1/; # remove leading 0s
|
---|
587 | $section = "" unless defined $section;
|
---|
588 |
|
---|
589 | if (defined $num) {
|
---|
590 | if (!defined $sectionref->{'subsections'}->{$num}) {
|
---|
591 | push (@{$sectionref->{'subsection_order'}}, $num);
|
---|
592 | $sectionref->{'subsections'}->{$num} = {'subsection_order'=>[],
|
---|
593 | 'next_subsection'=>1,
|
---|
594 | 'subsections'=>{},
|
---|
595 | 'metadata'=>[],
|
---|
596 | 'text'=>""};
|
---|
597 | if ($num >= $sectionref->{'next_subsection'}) {
|
---|
598 | $sectionref->{'next_subsection'} = $num + 1;
|
---|
599 | }
|
---|
600 | }
|
---|
601 | $sectionref = $sectionref->{'subsections'}->{$num};
|
---|
602 |
|
---|
603 | } else {
|
---|
604 | print STDERR "doc::create_named_section couldn't create section ";
|
---|
605 | print STDERR "$mastersection\n";
|
---|
606 | last;
|
---|
607 | }
|
---|
608 | }
|
---|
609 | }
|
---|
610 |
|
---|
611 | # returns a reference to a list of subsections
|
---|
612 | sub list_subsections {
|
---|
613 | my $self = shift (@_);
|
---|
614 | my ($section) = @_;
|
---|
615 |
|
---|
616 | my $section_ptr = $self->_lookup_section ($section);
|
---|
617 | if (!defined $section_ptr) {
|
---|
618 | print STDERR "doc::list_subsections couldn't find section $section\n";
|
---|
619 | return [];
|
---|
620 | }
|
---|
621 |
|
---|
622 | return [@{$section_ptr->{'subsection_order'}}];
|
---|
623 | }
|
---|
624 |
|
---|
625 | sub delete_section {
|
---|
626 | my $self = shift (@_);
|
---|
627 | my ($section) = @_;
|
---|
628 |
|
---|
629 | # my $section_ptr = {'subsection_order'=>[],
|
---|
630 | # 'next_subsection'=>1,
|
---|
631 | # 'subsections'=>{},
|
---|
632 | # 'metadata'=>[],
|
---|
633 | # 'text'=>""};
|
---|
634 |
|
---|
635 | # if this is the top section reset everything
|
---|
636 | if ($section eq "") {
|
---|
637 | $self->{'subsection_order'} = [];
|
---|
638 | $self->{'subsections'} = {};
|
---|
639 | $self->{'metadata'} = [];
|
---|
640 | $self->{'text'} = "";
|
---|
641 | return;
|
---|
642 | }
|
---|
643 |
|
---|
644 | # find the parent of the section to delete
|
---|
645 | my $parent_section = "";
|
---|
646 | my $child = "0";
|
---|
647 | my @section = split (/\./, $section);
|
---|
648 | if (scalar(@section) > 0) {
|
---|
649 | $child = pop (@section);
|
---|
650 | $parent_section = join (".", @section);
|
---|
651 | }
|
---|
652 |
|
---|
653 | my $parent_section_ptr = $self->_lookup_section($parent_section);
|
---|
654 | if (!defined $parent_section_ptr) {
|
---|
655 | print STDERR "doc::delete_section couldn't find parent section " .
|
---|
656 | "$parent_section\n";
|
---|
657 | return;
|
---|
658 | }
|
---|
659 |
|
---|
660 | # remove this section from the subsection_order list
|
---|
661 | my $i = 0;
|
---|
662 | while ($i < scalar (@{$parent_section_ptr->{'subsection_order'}})) {
|
---|
663 | if ($parent_section_ptr->{'subsection_order'}->[$i] eq $child) {
|
---|
664 | splice (@{$parent_section_ptr->{'subsection_order'}}, $i, 1);
|
---|
665 | last;
|
---|
666 | }
|
---|
667 | $i++;
|
---|
668 | }
|
---|
669 |
|
---|
670 | # remove this section from the subsection hash
|
---|
671 | if (defined ($parent_section_ptr->{'subsections'}->{$child})) {
|
---|
672 | undef $parent_section_ptr->{'subsections'}->{$child};
|
---|
673 | }
|
---|
674 | }
|
---|
675 |
|
---|
676 | #--
|
---|
677 | # methods for dealing with metadata
|
---|
678 |
|
---|
679 | # set_metadata_element and get_metadata_element are for metadata
|
---|
680 | # which should only have one value. add_meta_data and get_metadata
|
---|
681 | # are for metadata which can have more than one value.
|
---|
682 |
|
---|
683 | # returns the first metadata value which matches field
|
---|
684 | sub get_metadata_element {
|
---|
685 | my $self = shift (@_);
|
---|
686 | my ($section, $field) = @_;
|
---|
687 | my ($data);
|
---|
688 |
|
---|
689 | my $section_ptr = $self->_lookup_section($section);
|
---|
690 | if (!defined $section_ptr) {
|
---|
691 | print STDERR "doc::get_metadata_element couldn't find section " .
|
---|
692 | "$section\n";
|
---|
693 | return;
|
---|
694 | }
|
---|
695 |
|
---|
696 | foreach $data (@{$section_ptr->{'metadata'}}) {
|
---|
697 | return $data->[1] if (scalar(@$data) >= 2 && $data->[0] eq $field);
|
---|
698 | }
|
---|
699 |
|
---|
700 | return undef; # was not found
|
---|
701 | }
|
---|
702 |
|
---|
703 |
|
---|
704 | # returns a list of the form [value1, value2, ...]
|
---|
705 | sub get_metadata {
|
---|
706 | my $self = shift (@_);
|
---|
707 | my ($section, $field) = @_;
|
---|
708 | my ($data);
|
---|
709 |
|
---|
710 | my $section_ptr = $self->_lookup_section($section);
|
---|
711 | if (!defined $section_ptr) {
|
---|
712 | print STDERR "doc::get_metadata couldn't find section " .
|
---|
713 | "$section\n";
|
---|
714 | return;
|
---|
715 | }
|
---|
716 |
|
---|
717 | my @metadata = ();
|
---|
718 | foreach $data (@{$section_ptr->{'metadata'}}) {
|
---|
719 | push (@metadata, $data->[1]) if ($data->[0] eq $field);
|
---|
720 | }
|
---|
721 |
|
---|
722 | return \@metadata;
|
---|
723 | }
|
---|
724 |
|
---|
725 | # returns a list of the form [[field,value],[field,value],...]
|
---|
726 | sub get_all_metadata {
|
---|
727 | my $self = shift (@_);
|
---|
728 | my ($section) = @_;
|
---|
729 |
|
---|
730 | my $section_ptr = $self->_lookup_section($section);
|
---|
731 | if (!defined $section_ptr) {
|
---|
732 | print STDERR "doc::get_all_metadata couldn't find section " .
|
---|
733 | "$section\n";
|
---|
734 | return;
|
---|
735 | }
|
---|
736 |
|
---|
737 | return $section_ptr->{'metadata'};
|
---|
738 | }
|
---|
739 |
|
---|
740 | # $value is optional
|
---|
741 | sub delete_metadata {
|
---|
742 | my $self = shift (@_);
|
---|
743 | my ($section, $field, $value) = @_;
|
---|
744 |
|
---|
745 | my $section_ptr = $self->_lookup_section($section);
|
---|
746 | if (!defined $section_ptr) {
|
---|
747 | print STDERR "doc::delete_metadata couldn't find section " .
|
---|
748 | "$section\n";
|
---|
749 | return;
|
---|
750 | }
|
---|
751 |
|
---|
752 | my $i = 0;
|
---|
753 | while ($i < scalar (@{$section_ptr->{'metadata'}})) {
|
---|
754 | if (($section_ptr->{'metadata'}->[$i]->[0] eq $field) &&
|
---|
755 | (!defined $value || $section_ptr->{'metadata'}->[$i]->[1] eq $value)) {
|
---|
756 | splice (@{$section_ptr->{'metadata'}}, $i, 1);
|
---|
757 | } else {
|
---|
758 | $i++;
|
---|
759 | }
|
---|
760 | }
|
---|
761 | }
|
---|
762 |
|
---|
763 | sub delete_all_metadata {
|
---|
764 | my $self = shift (@_);
|
---|
765 | my ($section) = @_;
|
---|
766 |
|
---|
767 | my $section_ptr = $self->_lookup_section($section);
|
---|
768 | if (!defined $section_ptr) {
|
---|
769 | print STDERR "doc::delete_all_metadata couldn't find section " .
|
---|
770 | "$section\n";
|
---|
771 | return;
|
---|
772 | }
|
---|
773 |
|
---|
774 | $section_ptr->{'metadata'} = [];
|
---|
775 | }
|
---|
776 |
|
---|
777 | sub set_metadata_element {
|
---|
778 | my $self = shift (@_);
|
---|
779 | my ($section, $field, $value) = @_;
|
---|
780 |
|
---|
781 | $self->set_utf8_metadata_element ($section, $field,
|
---|
782 | &unicode::ascii2utf8(\$value));
|
---|
783 | }
|
---|
784 |
|
---|
785 | # set_utf8_metadata_element assumes the text has already been
|
---|
786 | # converted to the UTF-8 encoding.
|
---|
787 | sub set_utf8_metadata_element {
|
---|
788 | my $self = shift (@_);
|
---|
789 | my ($section, $field, $value) = @_;
|
---|
790 |
|
---|
791 | $self->delete_metadata ($section, $field);
|
---|
792 | $self->add_utf8_metadata ($section, $field, $value);
|
---|
793 | }
|
---|
794 |
|
---|
795 |
|
---|
796 | # add_metadata assumes the text is in (extended) ascii form. For
|
---|
797 | # text which hash been already converted to the UTF-8 format use
|
---|
798 | # add_utf8_metadata.
|
---|
799 | sub add_metadata {
|
---|
800 | my $self = shift (@_);
|
---|
801 | my ($section, $field, $value) = @_;
|
---|
802 |
|
---|
803 | $self->add_utf8_metadata ($section, $field,
|
---|
804 | &unicode::ascii2utf8(\$value));
|
---|
805 | }
|
---|
806 |
|
---|
807 | # add_utf8_metadata assumes the text has already been converted
|
---|
808 | # to the UTF-8 encoding.
|
---|
809 | sub add_utf8_metadata {
|
---|
810 | my $self = shift (@_);
|
---|
811 | my ($section, $field, $value) = @_;
|
---|
812 |
|
---|
813 | my $section_ptr = $self->_lookup_section($section);
|
---|
814 | if (!defined $section_ptr) {
|
---|
815 | print STDERR "doc::add_utf8_metadata couldn't find section " .
|
---|
816 | "$section\n";
|
---|
817 | return;
|
---|
818 | }
|
---|
819 | if (!defined $value) {
|
---|
820 | print STDERR "doc::add_utf8_metadata undefined value for $field\n";
|
---|
821 | return;
|
---|
822 | }
|
---|
823 | if (!defined $field) {
|
---|
824 | print STDERR "doc::add_utf8_metadata undefined metadata type \n";
|
---|
825 | return;
|
---|
826 | }
|
---|
827 |
|
---|
828 | push (@{$section_ptr->{'metadata'}}, [$field, $value]);
|
---|
829 | }
|
---|
830 |
|
---|
831 |
|
---|
832 | # methods for dealing with text
|
---|
833 |
|
---|
834 | # returns the text for a section
|
---|
835 | sub get_text {
|
---|
836 | my $self = shift (@_);
|
---|
837 | my ($section) = @_;
|
---|
838 |
|
---|
839 | my $section_ptr = $self->_lookup_section($section);
|
---|
840 | if (!defined $section_ptr) {
|
---|
841 | print STDERR "doc::get_text couldn't find section " .
|
---|
842 | "$section\n";
|
---|
843 | return "";
|
---|
844 | }
|
---|
845 |
|
---|
846 | return $section_ptr->{'text'};
|
---|
847 | }
|
---|
848 |
|
---|
849 | # returns the (utf-8 encoded) length of the text for a section
|
---|
850 | sub get_text_length {
|
---|
851 | my $self = shift (@_);
|
---|
852 | my ($section) = @_;
|
---|
853 |
|
---|
854 | my $section_ptr = $self->_lookup_section($section);
|
---|
855 | if (!defined $section_ptr) {
|
---|
856 | print STDERR "doc::get_text_length couldn't find section " .
|
---|
857 | "$section\n";
|
---|
858 | return 0;
|
---|
859 | }
|
---|
860 |
|
---|
861 | return length ($section_ptr->{'text'});
|
---|
862 | }
|
---|
863 |
|
---|
864 | sub delete_text {
|
---|
865 | my $self = shift (@_);
|
---|
866 | my ($section) = @_;
|
---|
867 |
|
---|
868 | my $section_ptr = $self->_lookup_section($section);
|
---|
869 | if (!defined $section_ptr) {
|
---|
870 | print STDERR "doc::delete_text couldn't find section " .
|
---|
871 | "$section\n";
|
---|
872 | return;
|
---|
873 | }
|
---|
874 |
|
---|
875 | $section_ptr->{'text'} = "";
|
---|
876 | }
|
---|
877 |
|
---|
878 | # add_text assumes the text is in (extended) ascii form. For
|
---|
879 | # text which has been already converted to the UTF-8 format
|
---|
880 | # use add_utf8_text.
|
---|
881 | sub add_text {
|
---|
882 | my $self = shift (@_);
|
---|
883 | my ($section, $text) = @_;
|
---|
884 |
|
---|
885 | # convert the text to UTF-8 encoded unicode characters
|
---|
886 | # and add the text
|
---|
887 | $self->add_utf8_text($section, &unicode::ascii2utf8(\$text));
|
---|
888 | }
|
---|
889 |
|
---|
890 |
|
---|
891 | # add_utf8_text assumes the text to be added has already
|
---|
892 | # been converted to the UTF-8 encoding. For ascii text use
|
---|
893 | # add_text
|
---|
894 | sub add_utf8_text {
|
---|
895 | my $self = shift (@_);
|
---|
896 | my ($section, $text) = @_;
|
---|
897 |
|
---|
898 | my $section_ptr = $self->_lookup_section($section);
|
---|
899 | if (!defined $section_ptr) {
|
---|
900 | print STDERR "doc::add_utf8_text couldn't find section " .
|
---|
901 | "$section\n";
|
---|
902 | return;
|
---|
903 | }
|
---|
904 |
|
---|
905 | $section_ptr->{'text'} .= $text;
|
---|
906 | }
|
---|
907 |
|
---|
908 |
|
---|
909 | # methods for dealing with associated files
|
---|
910 |
|
---|
911 | # a file is associated with a document, NOT a section.
|
---|
912 | # if section is defined it is noted in the data structure
|
---|
913 | # only so that files associated from a particular section
|
---|
914 | # may be removed later (using delete_section_assoc_files)
|
---|
915 | sub associate_file {
|
---|
916 | my $self = shift (@_);
|
---|
917 | my ($real_filename, $assoc_filename, $mime_type, $section) = @_;
|
---|
918 | $mime_type = &ghtml::guess_mime_type ($real_filename) unless defined $mime_type;
|
---|
919 |
|
---|
920 | # remove all associated files with the same name
|
---|
921 | $self->delete_assoc_file ($assoc_filename);
|
---|
922 |
|
---|
923 | push (@{$self->{'associated_files'}},
|
---|
924 | [$real_filename, $assoc_filename, $mime_type, $section]);
|
---|
925 | }
|
---|
926 |
|
---|
927 | # returns a list of associated files in the form
|
---|
928 | # [[real_filename, assoc_filename, mimetype], ...]
|
---|
929 | sub get_assoc_files {
|
---|
930 | my $self = shift (@_);
|
---|
931 |
|
---|
932 | return $self->{'associated_files'};
|
---|
933 | }
|
---|
934 |
|
---|
935 | sub delete_section_assoc_files {
|
---|
936 | my $self = shift (@_);
|
---|
937 | my ($section) = @_;
|
---|
938 |
|
---|
939 | my $i=0;
|
---|
940 | while ($i < scalar (@{$self->{'associated_files'}})) {
|
---|
941 | if (defined $self->{'associated_files'}->[$i]->[3] &&
|
---|
942 | $self->{'associated_files'}->[$i]->[3] eq $section) {
|
---|
943 | splice (@{$self->{'associated_files'}}, $i, 1);
|
---|
944 | } else {
|
---|
945 | $i++;
|
---|
946 | }
|
---|
947 | }
|
---|
948 | }
|
---|
949 |
|
---|
950 | sub delete_assoc_file {
|
---|
951 | my $self = shift (@_);
|
---|
952 | my ($assoc_filename) = @_;
|
---|
953 |
|
---|
954 | my $i=0;
|
---|
955 | while ($i < scalar (@{$self->{'associated_files'}})) {
|
---|
956 | if ($self->{'associated_files'}->[$i]->[1] eq $assoc_filename) {
|
---|
957 | splice (@{$self->{'associated_files'}}, $i, 1);
|
---|
958 | } else {
|
---|
959 | $i++;
|
---|
960 | }
|
---|
961 | }
|
---|
962 | }
|
---|
963 |
|
---|
964 | sub reset_nextsection_ptr {
|
---|
965 | my $self = shift (@_);
|
---|
966 | my ($section) = @_;
|
---|
967 |
|
---|
968 | my $section_ptr = $self->_lookup_section($section);
|
---|
969 | $section_ptr->{'next_subsection'} = 1;
|
---|
970 | }
|
---|
971 |
|
---|
972 | 1;
|
---|