source: main/trunk/greenstone2/perllib/plugins/BasePlugin.pm@ 27949

Last change on this file since 27949 was 27949, checked in by ak19, 11 years ago

Need to sort extra metadata (e.g. ex.PDF.* and ex.File.* meta extracted from the PDFBox tutorial collection) to have these meta appear in a consistent order in doc.xml for diffcol to work correctly.
  • Property svn:keywords set to Author Date Id Revision
File size: 46.9 KB
Line 
1###########################################################################
2#
3# BasePlugin.pm -- base class for all the import plugins
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) 1999-2005 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
26package BasePlugin;
27
28use strict;
29no strict 'subs';
30no strict 'refs'; # allow filehandles to be variables and viceversa
31
32use File::Basename;
33use Encode;
34use Unicode::Normalize 'normalize';
35
36use encodings;
37use unicode;
38use doc;
39use ghtml;
40use gsprintf 'gsprintf';
41use util;
42use FileUtils;
43
44use PrintInfo;
45
46BEGIN {
47 @BasePlugin::ISA = ( 'PrintInfo' );
48}
49
50# the different methods that can be applied when renaming
51# imported documents and their associated files
52our $file_rename_method_list =
53 [ { 'name' => "url",
54 'desc' => "{BasePlugin.rename_method.url}" },
55 { 'name' => "base64",
56 'desc' => "{BasePlugin.rename_method.base64}" },
57 { 'name' => "none",
58 'desc' => "{BasePlugin.rename_method.none}",
59 'hiddengli' => "yes" } ];
60
61our $encoding_list =
62 [ { 'name' => "ascii",
63 'desc' => "{BasePlugin.encoding.ascii}" },
64 { 'name' => "utf8",
65 'desc' => "{BasePlugin.encoding.utf8}" },
66 { 'name' => "unicode",
67 'desc' => "{BasePlugin.encoding.unicode}" } ];
68
69
70my $e = $encodings::encodings;
71foreach my $enc (sort {$e->{$a}->{'name'} cmp $e->{$b}->{'name'}} keys (%$e))
72{
73 my $hashEncode =
74 {'name' => $enc,
75 'desc' => $e->{$enc}->{'name'}};
76
77 push(@{$encoding_list},$hashEncode);
78}
79
80our $encoding_plus_auto_list =
81 [ { 'name' => "auto",
82 'desc' => "{BasePlugin.filename_encoding.auto}" },
83 { 'name' => "auto-language-analysis",
84 'desc' => "{BasePlugin.filename_encoding.auto_language_analysis}" }, # textcat
85 { 'name' => "auto-filesystem-encoding",
86 'desc' => "{BasePlugin.filename_encoding.auto_filesystem_encoding}" }, # locale
87 { 'name' => "auto-fl",
88 'desc' => "{BasePlugin.filename_encoding.auto_fl}" }, # locale followed by textcat
89 { 'name' => "auto-lf",
90 'desc' => "{BasePlugin.filename_encoding.auto_lf}" } ]; # texcat followed by locale
91
92push(@{$encoding_plus_auto_list},@{$encoding_list});
93
94our $oidtype_list =
95 [ { 'name' => "auto",
96 'desc' => "{BasePlugin.OIDtype.auto}" },
97 { 'name' => "hash",
98 'desc' => "{import.OIDtype.hash}" },
99 { 'name' => "hash_on_ga_xml",
100 'desc' => "{import.OIDtype.hash_on_ga_xml}" },
101 { 'name' => "hash_on_full_filename",
102 'desc' => "{import.OIDtype.hash_on_full_filename}" },
103 { 'name' => "assigned",
104 'desc' => "{import.OIDtype.assigned}" },
105 { 'name' => "incremental",
106 'desc' => "{import.OIDtype.incremental}" },
107 { 'name' => "filename",
108 'desc' => "{import.OIDtype.filename}" },
109 { 'name' => "dirname",
110 'desc' => "{import.OIDtype.dirname}" },
111 { 'name' => "full_filename",
112 'desc' => "{import.OIDtype.full_filename}" } ];
113
114my $arguments =
115 [ { 'name' => "process_exp",
116 'desc' => "{BasePlugin.process_exp}",
117 'type' => "regexp",
118 'deft' => "",
119 'reqd' => "no" },
120 { 'name' => "no_blocking",
121 'desc' => "{BasePlugin.no_blocking}",
122 'type' => "flag",
123 'reqd' => "no"},
124 { 'name' => "block_exp",
125 'desc' => "{BasePlugin.block_exp}",
126 'type' => "regexp",
127 'deft' => "",
128 'reqd' => "no" },
129 { 'name' => "store_original_file",
130 'desc' => "{BasePlugin.store_original_file}",
131 'type' => "flag",
132 'reqd' => "no" },
133 { 'name' => "associate_ext",
134 'desc' => "{BasePlugin.associate_ext}",
135 'type' => "string",
136 'reqd' => "no" },
137 { 'name' => "associate_tail_re",
138 'desc' => "{BasePlugin.associate_tail_re}",
139 'type' => "string",
140 'reqd' => "no" },
141 { 'name' => "OIDtype",
142 'desc' => "{import.OIDtype}",
143 'type' => "enum",
144 'list' => $oidtype_list,
145 # leave default empty so we can tell if its been set or not - if not set will use option from import.pl
146 'deft' => "auto",
147 'reqd' => "no" },
148 { 'name' => "OIDmetadata",
149 'desc' => "{import.OIDmetadata}",
150 'type' => "metadata",
151 'deft' => "dc.Identifier",
152 'reqd' => "no" },
153# { 'name' => "use_as_doc_identifier",
154# 'desc' => "{BasePlugin.use_as_doc_identifier}",
155# 'type' => "string",
156# 'reqd' => "no" ,
157# 'deft' => "" } ,
158 { 'name' => "no_cover_image",
159 'desc' => "{BasePlugin.no_cover_image}",
160 'type' => "flag",
161 'reqd' => "no" },
162 { 'name' => "filename_encoding",
163 'desc' => "{BasePlugin.filename_encoding}",
164 'type' => "enum",
165 'deft' => "auto",
166 'list' => $encoding_plus_auto_list,
167 'reqd' => "no" },
168 { 'name' => "smart_block",
169 'desc' => "{common.deprecated}. {BasePlugin.smart_block}",
170 'type' => "flag",
171 'reqd' => "no",
172 'hiddengli' => "yes" }, # deprecated, but leave in for old collections
173 { 'name' => "file_rename_method",
174 'desc' => "{BasePlugin.file_rename_method}",
175 'type' => "enum",
176 'deft' => &get_default_file_rename_method(), # by default rename imported files and assoc files using this encoding
177 'list' => $file_rename_method_list,
178 'reqd' => "no"
179 }
180
181 ];
182
183
184my $options = { 'name' => "BasePlugin",
185 'desc' => "{BasePlugin.desc}",
186 'abstract' => "yes",
187 'inherits' => "no",
188 'args' => $arguments };
189
190sub new {
191
192 my ($class) = shift (@_);
193 my ($pluginlist,$inputargs,$hashArgOptLists,$auxiliary) = @_;
194 push(@$pluginlist, $class);
195
196 push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
197 push(@{$hashArgOptLists->{"OptList"}},$options);
198
199 my $self = new PrintInfo($pluginlist, $inputargs, $hashArgOptLists,$auxiliary);
200
201 if ($self->{'info_only'}) {
202 # don't worry about any options etc
203 return bless $self, $class;
204 }
205
206 if ($self->{'smart_block'}) {
207 print STDERR "WARNING: -smart_block option has been deprecated and is no longer useful\n";
208 }
209 $self->{'smart_block'} = undef;
210
211 my $plugin_name = (defined $pluginlist->[0]) ? $pluginlist->[0] : $class;
212 $self->{'plugin_type'} = $plugin_name;
213
214 # remove ex. from OIDmetadata iff it's the only namespace prefix
215 $self->{'OIDmetadata'} =~ s/^ex\.([^.]+)$/$1/ if defined $self->{'OIDmetadata'};
216 $self->{'num_processed'} = 0;
217 $self->{'num_not_processed'} = 0;
218 $self->{'num_blocked'} = 0;
219 $self->{'num_archives'} = 0;
220 $self->{'cover_image'} = 1; # cover image is on by default
221 $self->{'cover_image'} = 0 if ($self->{'no_cover_image'});
222 $self->{'can_process_directories'} = 0;
223 #$self->{'option_list'} = $hashArgOptLists->{"OptList"};
224
225 my $associate_ext = $self->{'associate_ext'};
226 if ((defined $associate_ext) && ($associate_ext ne "")) {
227
228 my $associate_tail_re = $self->{'associate_tail_re'};
229 if ((defined $associate_tail_re) && ($associate_tail_re ne "")) {
230 my $outhandle = $self->{'outhandle'};
231 print $outhandle "Warning: can only specify 'associate_ext' or 'associate_tail_re'\n";
232 print $outhandle " defaulting to 'associate_tail_re'\n";
233 }
234 else {
235 my @exts = split(/,/,$associate_ext);
236
237 my @exts_bracketed = map { $_ = "(?:\\.$_)" } @exts;
238 my $associate_tail_re = join("|",@exts_bracketed);
239 $self->{'associate_tail_re'} = $associate_tail_re;
240 }
241
242 delete $self->{'associate_ext'};
243 }
244
245 return bless $self, $class;
246
247}
248
249sub merge_inheritance
250{
251 my $self = {};
252 my @child_selfs = @_;
253
254 foreach my $child_self (@child_selfs) {
255 foreach my $key (keys %$child_self) {
256 if (defined $self->{$key}) {
257 if ($self->{$key} ne $child_self->{$key}) {
258# print STDERR "Warning: Conflicting value in multiple inheritance for '$key'\n";
259# print STDERR "Existing stored value = $self->{$key}\n";
260# print STDERR "New (child) value = $child_self->{$key}\n";
261# print STDERR "Keeping existing value\n";
262 # Existing value seems to be option specified in collect.cfg
263
264 ### $self->{$key} = $child_self->{$key};
265
266 }
267 else {
268## print STDERR "****Info: Value $self->{$key} for $key already defined through multiple inheritance as the same value\n";
269 }
270
271 }
272 else {
273 $self->{$key} = $child_self->{$key};
274 }
275 }
276 }
277
278 return $self;
279}
280
281# initialize BasePlugin options
282# if init() is overridden in a sub-class, remember to call BasePlugin::init()
283sub init {
284 my $self = shift (@_);
285 my ($verbosity, $outhandle, $failhandle) = @_;
286
287 # verbosity is passed through from the processor
288 $self->{'verbosity'} = $verbosity;
289
290 # as are the outhandle and failhandle
291 $self->{'outhandle'} = $outhandle if defined $outhandle;
292 $self->{'failhandle'} = $failhandle;
293# $self->SUPER::init(@_);
294
295 # set process_exp and block_exp to defaults unless they were
296 # explicitly set
297
298 if ((!$self->is_recursive()) and
299 (!defined $self->{'process_exp'}) || ($self->{'process_exp'} eq "")) {
300
301 $self->{'process_exp'} = $self->get_default_process_exp ();
302 if ($self->{'process_exp'} eq "") {
303 warn ref($self) . " Warning: Non-recursive plugin has no process_exp\n";
304 }
305 }
306
307 if ((!defined $self->{'block_exp'}) || ($self->{'block_exp'} eq "")) {
308 $self->{'block_exp'} = $self->get_default_block_exp ();
309 }
310
311}
312
313sub begin {
314 my $self = shift (@_);
315 my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
316
317 if ($self->{'OIDtype'} eq "auto") {
318 # hasn't been set in the plugin, use the processor values
319 $self->{'OIDtype'} = $processor->{'OIDtype'};
320 $self->{'OIDmetadata'} = $processor->{'OIDmetadata'};
321 }
322 if ($self->{'OIDtype'} eq "hash") {
323 # should we hash on the file or on the doc xml??
324 $self->{'OIDtype'} = $self->get_oid_hash_type();
325 if ($self->{'OIDtype'} !~ /^(hash_on_file|hash_on_ga_xml)$/) {
326 $self->{'OIDtype'} = "hash_on_file";
327 }
328 }
329}
330
331# This is called once if removeold is set with import.pl. Most plugins will do
332# nothing but if a plugin does any stuff outside of creating doc obj, then
333# it may need to clear something.
334sub remove_all {
335 my $self = shift (@_);
336 my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
337}
338
339# This is called per document for docs that have been deleted from the
340# collection. Most plugins will do nothing
341# but if a plugin does any stuff outside of creating doc obj, then it may need
342# to clear something.
343sub remove_one {
344 my $self = shift (@_);
345
346 my ($file, $oids, $archivedir) = @_;
347 return 0 if $self->can_process_this_file($file);
348 return undef;
349}
350
351sub end {
352 # potentially called at the end of each plugin pass
353 # import.pl only has one plugin pass, but buildcol.pl has multiple ones
354
355 my ($self) = shift (@_);
356}
357
358sub deinit {
359 # called only once, after all plugin passes have been done
360
361 my ($self) = @_;
362}
363
364# default hashing type is to hash on the original file (or converted file)
365# override this to return hash_on_ga_xml for filetypes where hashing on the
366# file is no good eg video
367sub get_oid_hash_type {
368
369 my $self = shift (@_);
370
371 return "hash_on_file";
372}
373
374
375# this function should be overridden to return 1
376# in recursive plugins
377sub is_recursive {
378 my $self = shift (@_);
379
380 return 0;
381}
382
383sub get_default_block_exp {
384 my $self = shift (@_);
385
386 return "";
387}
388
389sub get_default_process_exp {
390 my $self = shift (@_);
391
392 return "";
393}
394
395
396# rename imported files and assoc files using URL encoding by default
397# as this will work for most plugins and give more legible filenames
398sub get_default_file_rename_method() {
399 my $self = shift (@_);
400 return "url";
401}
402
403# returns this plugin's active (possibly user-selected) file_rename_method
404sub get_file_rename_method() {
405 my $self = shift (@_);
406 my $rename_method = $self->{'file_rename_method'};
407 if($rename_method) {
408 return $rename_method;
409 } else {
410 return $self->get_default_file_rename_method();
411 }
412}
413
414# default implementation is to do nothing
415sub store_block_files {
416
417 my $self =shift (@_);
418 my ($filename_full_path, $block_hash) = @_;
419
420}
421
422# put files to block into hash
423sub use_block_expressions {
424
425 my $self =shift (@_);
426 my ($filename_full_path, $block_hash) = @_;
427
428 $filename_full_path = &util::upgrade_if_dos_filename($filename_full_path);
429
430 if ($self->{'block_exp'} ne "" && $filename_full_path =~ /$self->{'block_exp'}/) {
431 &util::block_filename($block_hash,$filename_full_path);
432 }
433
434}
435
436#default implementation is to block a file with same name as this, but extension jpg or JPG, if cover_images is on.
437sub block_cover_image
438{
439 my $self =shift;
440 my ($filename, $block_hash) = @_;
441
442 $filename = &util::upgrade_if_dos_filename($filename);
443
444 if ($self->{'cover_image'}) {
445 my $coverfile = $filename;
446 $coverfile =~ s/\.[^\\\/\.]+$/\.jpg/;
447
448 #if there is no file extension, coverfile will be the same as filename
449 return if $coverfile eq $filename;
450
451 if (!&FileUtils::fileExists($coverfile)) {
452 $coverfile =~ s/jpg$/JPG/;
453 }
454 if (&FileUtils::fileExists($coverfile)) {
455 &util::block_filename($block_hash,$coverfile);
456 }
457 }
458
459 return;
460}
461
462
463# discover all the files that should be blocked by this plugin
464# check the args ...
465sub file_block_read {
466
467 my $self = shift (@_);
468 my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $gli) = @_;
469 # Keep track of filenames with same root but different extensions
470 # Used to support -associate_ext and the more generalised
471 # -associate_tail_re
472 my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
473
474 if (!-d $filename_full_path) {
475 $block_hash->{'all_files'}->{$file} = 1;
476 }
477
478 my $associate_tail_re = $self->{'associate_tail_re'};
479 if ((defined $associate_tail_re) && ($associate_tail_re ne "")) {
480 my ($file_prefix,$file_ext)
481 = &util::get_prefix_and_tail_by_regex($filename_full_path,$associate_tail_re);
482 if ((defined $file_prefix) && (defined $file_ext)) {
483 my $shared_fileroot = $block_hash->{'shared_fileroot'};
484 if (!defined $shared_fileroot->{$file_prefix}) {
485 my $file_prefix_rec = { 'tie_to' => undef,
486 'exts' => {} };
487 $shared_fileroot->{$file_prefix} = $file_prefix_rec;
488 }
489
490 my $file_prefix_rec = $shared_fileroot->{$file_prefix};
491
492 if ($self->can_process_this_file($filename_full_path)) {
493 # This is the document the others should be tied to
494 $file_prefix_rec->{'tie_to'} = $file_ext;
495 }
496 else {
497 if ($file_ext =~ m/$associate_tail_re$/) {
498 # this file should be associated to the main one
499 $file_prefix_rec->{'exts'}->{$file_ext} = 1;
500 }
501 }
502
503 }
504 }
505
506 # check block expressions
507 $self->use_block_expressions($filename_full_path, $block_hash) unless $self->{'no_blocking'};
508
509 # now check whether we are actually processing this
510 if (!-f $filename_full_path || !$self->can_process_this_file($filename_full_path)) {
511 return undef; # can't recognise
512 }
513
514 # if we have a block_exp, then this overrides the normal 'smart' blocking
515 $self->store_block_files($filename_full_path, $block_hash) unless ($self->{'no_blocking'} || $self->{'block_exp'} ne "");
516
517 # block the cover image if there is one
518 if ($self->{'cover_image'}) {
519 $self->block_cover_image($filename_full_path, $block_hash);
520 }
521
522 return 1;
523}
524
525# plugins that rely on more than process_exp (eg XML plugins) can override this method
526sub can_process_this_file {
527 my $self = shift(@_);
528 my ($filename) = @_;
529
530 if (-d $filename && !$self->{'can_process_directories'}) {
531 return 0;
532 }
533
534 if ($self->{'process_exp'} ne "" && $filename =~ /$self->{'process_exp'}/) {
535 return 1;
536 }
537 return 0;
538
539}
540
541# Even if a plugin can extract metadata in its metadata_read pass,
542# make the default return 'undef' so processing of the file continues
543# down the pipeline, so other plugins can also have the opportunity to
544# locate metadata and set it up in the extrametakeys variables that
545# are passed around.
546
547sub can_process_this_file_for_metadata {
548 my $self = shift(@_);
549
550 return undef;
551}
552
553
554# just converts path as is to utf8.
555sub filepath_to_utf8 {
556 my $self = shift (@_);
557 my ($file, $file_encoding) = @_;
558 my $filemeta = $file;
559
560 my $filename_encoding = $self->{'filename_encoding'}; # filename encoding setting
561
562 # Whenever filename-encoding is set to any of the auto settings, we
563 # check if the filename is already in UTF8. If it is, then we're done.
564 if($filename_encoding =~ m/auto/) {
565 if(&unicode::check_is_utf8($filemeta))
566 {
567 $filename_encoding = "utf8";
568 return $filemeta;
569 }
570 }
571
572 # Auto setting, but filename is not utf8
573 if ($filename_encoding eq "auto")
574 {
575 # try textcat
576 $filename_encoding = $self->textcat_encoding($filemeta);
577
578 # check the locale next
579 $filename_encoding = $self->locale_encoding() if $filename_encoding eq "undefined";
580
581
582 # now try the encoding of the document, if available
583 if ($filename_encoding eq "undefined" && defined $file_encoding) {
584 $filename_encoding = $file_encoding;
585 }
586
587 }
588
589 elsif ($filename_encoding eq "auto-language-analysis")
590 {
591 $filename_encoding = $self->textcat_encoding($filemeta);
592
593 # now try the encoding of the document, if available
594 if ($filename_encoding eq "undefined" && defined $file_encoding) {
595 $filename_encoding = $file_encoding;
596 }
597 }
598
599 elsif ($filename_encoding eq "auto-filesystem-encoding")
600 {
601 # try locale
602 $filename_encoding = $self->locale_encoding();
603 }
604
605 elsif ($filename_encoding eq "auto-fl")
606 {
607 # filesystem-encoding (locale) then language-analysis (textcat)
608 $filename_encoding = $self->locale_encoding();
609
610 # try textcat
611 $filename_encoding = $self->textcat_encoding($filemeta) if $filename_encoding eq "undefined";
612
613 # else assume filename encoding is encoding of file content, if that's available
614 if ($filename_encoding eq "undefined" && defined $file_encoding) {
615 $filename_encoding = $file_encoding;
616 }
617 }
618
619 elsif ($filename_encoding eq "auto-lf")
620 {
621 # language-analysis (textcat) then filesystem-encoding (locale)
622 $filename_encoding = $self->textcat_encoding($filemeta);
623
624 # guess filename encoding from encoding of file content, if available
625 if ($filename_encoding eq "undefined" && defined $file_encoding) {
626 $filename_encoding = $file_encoding;
627 }
628
629 # try locale
630 $filename_encoding = $self->locale_encoding() if $filename_encoding eq "undefined";
631 }
632
633 # if still undefined, use utf8 as fallback
634 if ($filename_encoding eq "undefined") {
635 $filename_encoding = "utf8";
636 }
637
638 #print STDERR "**** UTF8 encoding the filename $filemeta ";
639
640 # if the filename encoding is set to utf8 but it isn't utf8 already--such as when
641 # 1. the utf8 fallback is used, or 2. if the system locale is used and happens to
642 # be always utf8 (in which case the filename's encoding is also set as utf8 even
643 # though the filename need not be if it originates from another system)--in such
644 # cases attempt to make the filename utf8 to match.
645 if($filename_encoding eq "utf8" && !&unicode::check_is_utf8($filemeta)) {
646 &unicode::ensure_utf8(\$filemeta);
647 }
648
649 # convert non-unicode encodings to utf8
650 if ($filename_encoding !~ m/(?:ascii|utf8|unicode)/) {
651 $filemeta = &unicode::unicode2utf8(
652 &unicode::convert2unicode($filename_encoding, \$filemeta)
653 );
654 }
655
656 #print STDERR " from encoding $filename_encoding -> $filemeta\n";
657 return $filemeta;
658}
659
660# gets the filename with no path, converts to utf8, and then dm safes it.
661# filename_encoding set by user
662sub filename_to_utf8_metadata
663{
664 my $self = shift (@_);
665 my ($file, $file_encoding) = @_;
666
667 my $outhandle = $self->{'outhandle'};
668
669 print $outhandle "****!!!!**** BasePlugin::filename_to_utf8_metadata now deprecated\n";
670 my ($cpackage,$cfilename,$cline,$csubr,$chas_args,$cwantarray) = caller(0);
671 print $outhandle "Calling method: $cfilename:$cline $cpackage->$csubr\n";
672
673
674 my ($filemeta) = $file =~ /([^\\\/]+)$/; # getting the tail of the filepath (skips all string parts containing slashes upto the end)
675 $filemeta = $self->filepath_to_utf8($filemeta, $file_encoding);
676
677 return $filemeta;
678}
679
680sub locale_encoding {
681 my $self = shift(@_);
682
683 if (!defined $self->{'filesystem_encoding'}) {
684 $self->{'filesystem_encoding'} = $self->get_filesystem_encoding();
685 }
686
687 #print STDERR "*** filename encoding determined based on locale: " . $self->{'filesystem_encoding'} . "\n";
688 return $self->{'filesystem_encoding'}; # can be the string "undefined"
689}
690
691sub textcat_encoding {
692 my $self = shift(@_);
693 my ($filemeta) = @_;
694
695 # analyse filenames without extensions and digits (and trimmed of
696 # surrounding whitespace), so that irrelevant chars don't confuse
697 # textcat
698 my $strictfilemeta = $filemeta;
699 $strictfilemeta =~ s/\.[^\.]+$//g;
700 $strictfilemeta =~ s/\d//g;
701 $strictfilemeta =~ s/^\s*//g;
702 $strictfilemeta =~ s/\s*$//g;
703
704 my $filename_encoding = $self->encoding_from_language_analysis($strictfilemeta);
705 if(!defined $filename_encoding) {
706 $filename_encoding = "undefined";
707 }
708
709 return $filename_encoding; # can be the string "undefined"
710}
711
712# performs textcat
713sub encoding_from_language_analysis {
714 my $self = shift(@_);
715 my ($text) = @_;
716
717 my $outhandle = $self->{'outhandle'};
718 my $best_encoding = undef;
719
720 # get the language/encoding of the textstring using textcat
721 require textcat; # Only load the textcat module if it is required
722 $self->{'textcat'} = new textcat() unless defined($self->{'textcat'});
723 my $results = $self->{'textcat'}->classify_cached_filename(\$text);
724
725
726 if (scalar @$results < 0) {
727 return undef;
728 }
729
730 # We have some results, we choose the first
731 my ($language, $encoding) = $results->[0] =~ /^([^-]*)(?:-(.*))?$/;
732
733 $best_encoding = $encoding;
734 if (!defined $best_encoding) {
735 return undef;
736 }
737
738 if (defined $best_encoding && $best_encoding =~ m/^iso_8859/ && &unicode::check_is_utf8($text)) {
739 # the text is valid utf8, so assume that's the real encoding (since textcat is based on probabilities)
740 $best_encoding = 'utf8';
741 }
742
743
744 # check for equivalents where textcat doesn't have some encodings...
745 # eg MS versions of standard encodings
746 if (defined $best_encoding && $best_encoding =~ /^iso_8859_(\d+)/) {
747 my $iso = $1; # which variant of the iso standard?
748 # iso-8859 sets don't use chars 0x80-0x9f, windows codepages do
749 if ($text =~ /[\x80-\x9f]/) {
750 # Western Europe
751 if ($iso == 1 or $iso == 15) { $best_encoding = 'windows_1252' }
752 elsif ($iso == 2) {$best_encoding = 'windows_1250'} # Central Europe
753 elsif ($iso == 5) {$best_encoding = 'windows_1251'} # Cyrillic
754 elsif ($iso == 6) {$best_encoding = 'windows_1256'} # Arabic
755 elsif ($iso == 7) {$best_encoding = 'windows_1253'} # Greek
756 elsif ($iso == 8) {$best_encoding = 'windows_1255'} # Hebrew
757 elsif ($iso == 9) {$best_encoding = 'windows_1254'} # Turkish
758 }
759 }
760
761 if (defined $best_encoding && $best_encoding !~ /^(ascii|utf8|unicode)$/ &&
762 !defined $encodings::encodings->{$best_encoding})
763 {
764 if ($self->{'verbosity'}) {
765 gsprintf($outhandle, "BasePlugin: {ReadTextFile.unsupported_encoding}\n", $text, $best_encoding, "undef");
766 }
767 $best_encoding = undef;
768 }
769
770 return $best_encoding;
771}
772
773# uses locale
774sub get_filesystem_encoding
775{
776
777 my $self = shift(@_);
778
779 my $outhandle = $self->{'outhandle'};
780 my $filesystem_encoding = undef;
781
782 eval {
783 # Works for Windows as well, returning the DOS code page in use
784 use POSIX qw(locale_h);
785
786 # With only one parameter, setlocale retrieves the
787 # current value
788 my $current_locale = setlocale(LC_CTYPE);
789
790 my $char_encoding = undef;
791 if ($current_locale =~ m/\./) {
792 ($char_encoding) = ($current_locale =~ m/^.*\.(.*?)$/);
793 $char_encoding = lc($char_encoding);
794 }
795 else {
796 if ($current_locale =~ m/^(posix|c)$/i) {
797 $char_encoding = "ascii";
798 }
799 }
800
801 if (defined $char_encoding) {
802 if ($char_encoding =~ m/^(iso)(8859)-?(\d{1,2})$/) {
803 $char_encoding = "$1\_$2\_$3";
804 }
805
806 $char_encoding =~ s/-/_/g;
807 $char_encoding =~ s/^utf_8$/utf8/;
808
809 if ($char_encoding =~ m/^\d+$/) {
810 if (defined $encodings::encodings->{"windows_$char_encoding"}) {
811 $char_encoding = "windows_$char_encoding";
812 }
813 elsif (defined $encodings::encodings->{"dos_$char_encoding"}) {
814 $char_encoding = "dos_$char_encoding";
815 }
816 }
817
818 if (($char_encoding =~ m/(?:ascii|utf8|unicode)/)
819 || (defined $encodings::encodings->{$char_encoding})) {
820 $filesystem_encoding = $char_encoding;
821 }
822 else {
823 print $outhandle "Warning: Unsupported character encoding '$char_encoding' from locale '$current_locale'\n";
824 }
825 }
826
827
828 };
829 if ($@) {
830 print $outhandle "$@\n";
831 print $outhandle "Warning: Unable to establish locale. Will assume filesystem is UTF-8\n";
832
833 }
834
835 return $filesystem_encoding;
836}
837
838
839
840sub deduce_filename_encoding
841{
842 my $self = shift (@_);
843 my ($file,$metadata,$plugin_filename_encoding) = @_;
844
845 my $gs_filename_encoding = $metadata->{"gs.filenameEncoding"};
846 my $deduced_filename_encoding = undef;
847
848 # Start by looking for manually assigned metadata
849 if (defined $gs_filename_encoding) {
850 if (ref ($gs_filename_encoding) eq "ARRAY") {
851 my $outhandle = $self->{'outhandle'};
852
853 $deduced_filename_encoding = $gs_filename_encoding->[0];
854
855 my $num_vals = scalar(@$gs_filename_encoding);
856 if ($num_vals>1) {
857 print $outhandle "Warning: gs.filenameEncoding multiply defined for $file\n";
858 print $outhandle " Selecting first value: $deduced_filename_encoding\n";
859 }
860 }
861 else {
862 $deduced_filename_encoding = $gs_filename_encoding;
863 }
864 }
865
866 if (!defined $deduced_filename_encoding || ($deduced_filename_encoding =~ m/^\s*$/)) {
867 # Look to see if plugin specifies this value
868
869 if (defined $plugin_filename_encoding) {
870 # First look to see if we're using any of the "older" (i.e. deprecated auto-... plugin options)
871 if ($plugin_filename_encoding =~ m/^auto-.*$/) {
872 my $outhandle = $self->{'outhandle'};
873 print $outhandle "Warning: $plugin_filename_encoding is no longer supported\n";
874 print $outhandle " default to 'auto'\n";
875 $self->{'filename_encoding'} = $plugin_filename_encoding = "auto";
876 }
877
878 if ($plugin_filename_encoding ne "auto") {
879 # We've been given a specific filenamne encoding
880 # => so use it!
881 $deduced_filename_encoding = $plugin_filename_encoding;
882 }
883 }
884 }
885
886 if (!defined $deduced_filename_encoding || ($deduced_filename_encoding =~ m/^\s*$/)) {
887
888 # Look to file system to provide a character encoding
889
890 # If Windows NTFS, then -- assuming we work with long file names got through
891 # Win32::GetLongFilePath() -- then the underlying file system is UTF16
892
893 if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
894 # Can do better than working with the DOS character encoding returned by locale
895 $deduced_filename_encoding = "unicode";
896 }
897 else {
898 # Unix of some form or other
899
900 # See if we can determine the file system encoding through locale
901 $deduced_filename_encoding = $self->locale_encoding();
902
903 # if locale shows us filesystem is utf8, check to see filename is consistent
904 # => if not, then we have an "alien" filename on our hands
905
906 if (defined $deduced_filename_encoding && $deduced_filename_encoding =~ m/^utf-?8$/i) {
907 if (!&unicode::check_is_utf8($file)) {
908 # "alien" filename, so revert
909 $deduced_filename_encoding = undef;
910 }
911 }
912 }
913 }
914
915# if (!defined $deduced_filename_encoding || ($deduced_filename_encoding =~ m/^\s*$/)) {
916# # Last chance, apply textcat to deduce filename encoding
917# $deduced_filename_encoding = $self->textcat_encoding($file);
918# }
919
920 if ($self->{'verbosity'}>3) {
921 my $outhandle = $self->{'outhandle'};
922
923 if (defined $deduced_filename_encoding) {
924 print $outhandle " Deduced filename encoding as: $deduced_filename_encoding\n";
925 }
926 else {
927 print $outhandle " No filename encoding deduced\n";
928 }
929 }
930
931 return $deduced_filename_encoding;
932}
933
934
935
936
937# Notionally written to be called once for each document, it is however safe to
938# call multiple times (as in the case of ImagePlugin) which calls this later on
939# after the original image has potentially been converted to a *new* source image
940# format (e.g. TIFF to PNG)
941
942sub set_Source_metadata {
943 my $self = shift (@_);
944 my ($doc_obj, $raw_filename, $filename_encoding, $section) = @_;
945
946 # 1. Sets the filename (Source) for display encoded as Unicode if possible,
947 # and (as a fallback) using %xx if not for non-ascii chars
948 # 2. Sets the url ref (SourceFile) to the URL encoded version
949 # of filename for generated files
950
951 my ($unused_full_rf, $raw_file) = &util::get_full_filenames("", $raw_filename);
952
953 my $this_section = (defined $section)? $section : $doc_obj->get_top_section();
954
955 my $octet_file = $raw_file;
956
957 # UTF-8 version of filename
958# if ((defined $ENV{"DEBUG_UNICODE"}) && ($ENV{"DEBUG_UNICODE"})) {
959# print STDERR "**** Setting Source Metadata given: $octet_file\n";
960# }
961
962 # Deal with (on Windows) raw filenames that are in their
963 # abbreviated DOS form
964
965 if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
966 if ((defined $filename_encoding) && ($filename_encoding eq "unicode")) {
967 if (-e $raw_filename) {
968 my $unicode_filename = Win32::GetLongPathName($raw_filename);
969
970 my $unused_full_uf;
971 ($unused_full_uf, $octet_file) = &util::get_full_filenames("", $unicode_filename);
972 }
973 }
974 }
975
976 my $url_encoded_filename;
977 if ((defined $filename_encoding) && ($filename_encoding ne "ascii")) {
978 # => Generate a pretty print version of filename that is mapped to Unicode
979
980 # Use filename_encoding to map raw filename to a Perl unicode-aware string
981 $url_encoded_filename = decode($filename_encoding,$octet_file);
982 }
983 else {
984 # otherwise generate %xx encoded version of filename for char > 127
985 $url_encoded_filename = &unicode::raw_filename_to_url_encoded($octet_file);
986 }
987
988# if ((defined $ENV{"DEBUG_UNICODE"}) && ($ENV{"DEBUG_UNICODE"})) {
989# print STDERR "****** saving Source as: $url_encoded_filename\n";
990# }
991
992 # In the case of converted files and (generalized) exploded documents, there
993 # will already be a source filename => store as OrigSource before overriding
994 my $orig_source = $doc_obj->get_metadata_element ($this_section, "Source");
995 if ((defined $orig_source) && ($orig_source !~ m/^\s*$/)) {
996 $doc_obj->set_utf8_metadata_element($this_section, "OrigSource", $orig_source);
997 }
998
999 # Source is the UTF8 display name - not necessarily the name of the file on the system
1000 if ($ENV{'GSDLOS'} =~ m/^darwin$/i) {
1001 # on Darwin want all display strings to be in composed form, then can search on that
1002 $url_encoded_filename = normalize('C', $url_encoded_filename); # Normalisation Form 'C' (composition)
1003 }
1004 $doc_obj->set_utf8_metadata_element($this_section, "Source", $url_encoded_filename);
1005
1006
1007 my $renamed_raw_file = &util::rename_file($raw_file, $self->{'file_rename_method'});
1008 # If using URL encoding, then SourceFile is the url-reference to url-encoded
1009 # renamed_raw_url: it's a url that refers to the actual file on the system
1010 my $renamed_raw_url = &unicode::filename_to_url($renamed_raw_file);
1011
1012 $doc_obj->set_utf8_metadata_element($this_section, "SourceFile",
1013 $renamed_raw_url);
1014
1015# if ((defined $ENV{"DEBUG_UNICODE"}) && ($ENV{"DEBUG_UNICODE"})) {
1016# print STDERR "****** saving SourceFile as: $renamed_raw_url\n";
1017# }
1018}
1019
1020# this should be called by all plugins to set the oid of the doc obj, rather
1021# than calling doc_obj->set_OID directly
1022sub add_OID {
1023 my $self = shift (@_);
1024 my ($doc_obj, $force) = @_;
1025
1026 # don't add one if there is one already set, unless we are forced to do so
1027 return unless ($doc_obj->get_OID() =~ /^NULL$/ || $force);
1028 $doc_obj->set_OIDtype($self->{'OIDtype'}, $self->{'OIDmetadata'});
1029
1030 # see if there is a plugin specific set_OID function
1031 if (defined ($self->can('set_OID'))) {
1032 $self->set_OID(@_); # pass through doc_obj and any extra arguments
1033 }
1034 else {
1035 # use the default set_OID() in doc.pm
1036 $doc_obj->set_OID();
1037 }
1038
1039}
1040
1041# The BasePlugin read_into_doc_obj() function. This function does all the
1042# right things to make general options work for a given plugin. It doesn't do anything with the file other than setting reads in
1043# a file and sets up a slew of metadata all saved in doc_obj, which
1044# it then returns as part of a tuple (process_status,doc_obj)
1045#
1046# Much of this functionality used to reside in read, but it was broken
1047# down into a supporting routine to make the code more flexible.
1048#
1049# recursive plugins (e.g. RecPlug) and specialized plugins like those
1050# capable of processing many documents within a single file (e.g.
1051# GMLPlug) will normally want to implement their own version of
1052# read_into_doc_obj()
1053#
1054# Note that $base_dir might be "" and that $file might
1055# include directories
1056
1057# currently blocking has been done before it gets here - does this affect secondary plugin stuff??
1058sub read_into_doc_obj {
1059 my $self = shift (@_);
1060 my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
1061
1062 my $outhandle = $self->{'outhandle'};
1063
1064 # should we move this to read? What about secondary plugins?
1065 my $pp_file = &util::prettyprint_file($base_dir,$file,$gli);
1066 print STDERR "<Processing n='$file' p='$self->{'plugin_type'}'>\n" if ($gli);
1067 print $outhandle "$self->{'plugin_type'} processing $pp_file\n"
1068 if $self->{'verbosity'} > 1;
1069
1070 my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
1071
1072 # create a new document
1073 my $doc_obj = new doc ($filename_full_path, "indexed_doc", $self->{'file_rename_method'});
1074 my $top_section = $doc_obj->get_top_section();
1075
1076 $doc_obj->add_utf8_metadata($top_section, "Plugin", "$self->{'plugin_type'}");
1077 $doc_obj->add_utf8_metadata($top_section, "FileSize", (-s $filename_full_path));
1078
1079
1080 my $plugin_filename_encoding = $self->{'filename_encoding'};
1081 my $filename_encoding = $self->deduce_filename_encoding($file,$metadata,$plugin_filename_encoding);
1082 $self->set_Source_metadata($doc_obj,$filename_full_path,$filename_encoding,$top_section);
1083
1084 # plugin specific stuff - what args do we need here??
1085 unless (defined ($self->process($pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli))) {
1086 print STDERR "<ProcessingError n='$file'>\n" if ($gli);
1087 return -1;
1088 }
1089
1090 # include any metadata passed in from previous plugins
1091 # note that this metadata is associated with the top level section
1092 my $section = $doc_obj->get_top_section();
1093 # can we merge these two methods??
1094 $self->add_associated_files($doc_obj, $filename_full_path);
1095 $self->extra_metadata ($doc_obj, $section, $metadata);
1096 $self->auto_extract_metadata($doc_obj);
1097
1098 # if we haven't found any Title so far, assign one
1099 # this was shifted to here from inside read()
1100 $self->title_fallback($doc_obj,$section,$filename_no_path);
1101
1102 $self->add_OID($doc_obj);
1103
1104 $self->post_process_doc_obj($pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli);
1105 return (1,$doc_obj);
1106}
1107
1108sub post_process_doc_obj {
1109 my $self = shift (@_);
1110 my ($pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
1111
1112 return 1;
1113}
1114
1115sub add_dummy_text {
1116 my $self = shift(@_);
1117 my ($doc_obj, $section) = @_;
1118
1119 # add NoText metadata so we can hide this dummy text in format statements
1120 $doc_obj->add_metadata($section, "NoText", "1");
1121 $doc_obj->add_text($section, &gsprintf::lookup_string("{BasePlugin.dummy_text}",1));
1122
1123}
1124
1125# does nothing. Can be overridden by subclass
1126sub auto_extract_metadata {
1127 my $self = shift(@_);
1128 my ($doc_obj) = @_;
1129}
1130
1131# adds cover image, associate_file options stuff. Should be called by sub class
1132# read_into_doc_obj
1133sub add_associated_files {
1134 my $self = shift(@_);
1135 # whatis filename??
1136 my ($doc_obj, $filename) = @_;
1137
1138 # add in the cover image
1139 if ($self->{'cover_image'}) {
1140 $self->associate_cover_image($doc_obj, $filename);
1141 }
1142 # store the original (used for eg TextPlugin to store the original for OAI)
1143 if ($self->{'store_original_file'}) {
1144 $self->associate_source_file($doc_obj, $filename);
1145 }
1146
1147
1148}
1149
1150# implement this if you are extracting metadata for other documents
1151sub metadata_read {
1152 my $self = shift (@_);
1153 my ($pluginfo, $base_dir, $file, $block_hash,
1154 $extrametakeys, $extrametadata, $extrametafile,
1155 $processor, $gli, $aux) = @_;
1156
1157 # can we process this file??
1158 my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
1159 return undef unless $self->can_process_this_file_for_metadata($filename_full_path);
1160
1161 return 1; # we recognise the file, but don't actually do anything with it
1162}
1163
1164
1165# The BasePlugin read() function. This function calls read_into_doc_obj()
1166# to ensure all the right things to make general options work for a
1167# given plugin are done. It then calls the process() function which
1168# does all the work specific to a plugin (like the old read functions
1169# used to do). Most plugins should define their own process() function
1170# and let this read() function keep control.
1171#
1172# recursive plugins (e.g. RecPlug) and specialized plugins like those
1173# capable of processing many documents within a single file (e.g.
1174# GMLPlug) might want to implement their own version of read(), but
1175# more likely need to implement their own version of read_into_doc_obj()
1176#
1177# Return number of files processed, undef if can't recognise, -1 if can't
1178# process
1179
1180sub read {
1181 my $self = shift (@_);
1182 my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
1183
1184 # can we process this file??
1185 my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
1186
1187 return undef unless $self->can_process_this_file($filename_full_path);
1188
1189 my ($process_status,$doc_obj) = $self->read_into_doc_obj(@_);
1190
1191 if ((defined $process_status) && ($process_status == 1)) {
1192
1193 # process the document
1194 $processor->process($doc_obj);
1195
1196 $self->{'num_processed'} ++;
1197 undef $doc_obj;
1198 }
1199 # delete any temp files that we may have created
1200 $self->clean_up_after_doc_obj_processing();
1201
1202
1203 # if process_status == 1, then the file has been processed.
1204 return $process_status;
1205
1206}
1207
1208# returns undef if file is rejected by the plugin
1209sub process {
1210 my $self = shift (@_);
1211 my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
1212
1213 gsprintf(STDERR, "BasePlugin::process {common.must_be_implemented}\n");
1214
1215 my ($cpackage,$cfilename,$cline,$csubr,$chas_args,$cwantarray) = caller(1);
1216 print STDERR "Calling method: $cfilename:$cline $cpackage->$csubr\n";
1217
1218 die "\n";
1219
1220 return undef; # never gets here
1221}
1222
1223# overwrite this method to delete any temp files that we have created
1224sub clean_up_after_doc_obj_processing {
1225 my $self = shift(@_);
1226
1227}
1228
1229# write_file -- used by ConvertToPlug, for example in post processing
1230#
1231# where should this go, is here the best place??
1232sub utf8_write_file {
1233 my $self = shift (@_);
1234 my ($textref, $filename) = @_;
1235
1236 if (!open (FILE, ">:utf8", $filename)) {
1237 gsprintf(STDERR, "ConvertToPlug::write_file {ConvertToPlug.could_not_open_for_writing} ($!)\n", $filename);
1238 die "\n";
1239 }
1240 print FILE $$textref;
1241
1242 close FILE;
1243}
1244
1245
1246sub filename_based_title
1247{
1248 my $self = shift (@_);
1249 my ($file) = @_;
1250
1251 my $file_derived_title = $file;
1252 $file_derived_title =~ s/_/ /g;
1253 $file_derived_title =~ s/\.[^.]+$//;
1254
1255 return $file_derived_title;
1256}
1257
1258
1259sub title_fallback
1260{
1261 my $self = shift (@_);
1262 my ($doc_obj,$section,$file) = @_;
1263
1264 if (!defined $doc_obj->get_metadata_element ($section, "Title")
1265 || $doc_obj->get_metadata_element($section, "Title") eq "") {
1266
1267 my $source_file = $doc_obj->get_metadata_element($section, "Source");
1268 my $file_derived_title;
1269 if (defined $source_file) {
1270 $file_derived_title = $self->filename_based_title($source_file);
1271 }
1272 else {
1273 # pp = pretty print
1274 my $pp_file = (defined $source_file) ? $source_file : $file;
1275
1276 my $raw_title = $self->filename_based_title($file);
1277 my $file_derived_title = &unicode::raw_filename_to_url_encoded($raw_title);
1278 }
1279
1280
1281 if (!defined $doc_obj->get_metadata_element ($section, "Title")) {
1282 $doc_obj->add_utf8_metadata ($section, "Title", $file_derived_title);
1283 }
1284 else {
1285 $doc_obj->set_utf8_metadata_element ($section, "Title", $file_derived_title);
1286 }
1287 }
1288
1289}
1290
1291# add any extra metadata that's been passed around from one
1292# plugin to another.
1293# extra_metadata uses add_utf8_metadata so it expects metadata values
1294# to already be in utf8
1295sub extra_metadata {
1296 my $self = shift (@_);
1297 my ($doc_obj, $cursection, $metadata) = @_;
1298
1299 my $associate_tail_re = $self->{'associate_tail_re'};
1300
1301# Sort the extra metadata for diffcol so these meta appear in a consistent order
1302# in doc.xml. Necessary for the ex.PDF.* and ex.File.* meta that's extracted in
1303# the PDFBox collection, as the order of these varies between CentOS and Ubuntu.
1304 foreach my $field (sort keys(%$metadata)) {
1305 # $metadata->{$field} may be an array reference
1306 if ($field eq "gsdlassocfile_tobe") {
1307 # 'gsdlassocfile_tobe' is artificially introduced metadata
1308 # that is used to signal that certain additional files should
1309 # be tied to this document. Useful in situations where a
1310 # metadata pass in the plugin pipeline works out some files
1311 # need to be associated with a document, but the document hasn't
1312 # been formed yet.
1313 my $equiv_form = "";
1314 foreach my $gaf (@{$metadata->{$field}}) {
1315 my ($full_filename,$mimetype) = ($gaf =~ m/^(.*):(.*):$/);
1316 my ($tail_filename) = ($full_filename =~ /^.*[\/\\](.+?)$/);
1317
1318 # we need to make sure the filename is valid utf-8 - we do
1319 # this by url or base64 encoding it
1320 # $tail_filename is the name that we store the file as
1321 $tail_filename = &util::rename_file($tail_filename, $self->{'file_rename_method'});
1322 $doc_obj->associate_file($full_filename,$tail_filename,$mimetype);
1323 $doc_obj->associate_source_file($full_filename);
1324 # If the filename is url_encoded, we need to encode the % signs
1325 # in the filename, so that it works in a url
1326 my $url_tail_filename = &unicode::filename_to_url($tail_filename);
1327 # work out extended tail extension (i.e. matching tail re)
1328
1329 my ($file_prefix,$file_extended_ext)
1330 = &util::get_prefix_and_tail_by_regex($tail_filename,$associate_tail_re);
1331 my ($pre_doc_ext) = ($file_extended_ext =~ m/^(.*)\..*$/);
1332 my ($doc_ext) = ($tail_filename =~ m/^.*\.(.*)$/);
1333
1334 # the greenstone 2 stuff
1335 my $start_doclink = "<a href=\"_httpprefix_/collect/[collection]/index/assoc/{Or}{[parent(Top):assocfilepath],[assocfilepath]}/$url_tail_filename\">";
1336 #my $start_doclink = "<a href=\'_httpprefix_/collect/[collection]/index/assoc/[assocfilepath]/$url_tail_filename\'>";
1337 my $start_doclink_gs3 = "<a href=\'_httpprefix_/collect/[collection]/index/assoc/[assocfilepath]/$url_tail_filename\'>";
1338
1339 my $srcicon = "_icon".$doc_ext."_";
1340 my $end_doclink = "</a>";
1341
1342 my $assoc_form = "$start_doclink\{If\}{$srcicon,$srcicon,$doc_ext\}$end_doclink";
1343
1344
1345 if (defined $pre_doc_ext && $pre_doc_ext ne "") {
1346 # for metadata such as [mp3._edited] [mp3._full] ...
1347 $doc_obj->add_utf8_metadata ($cursection, "$doc_ext.$pre_doc_ext", $assoc_form);
1348 }
1349
1350 # for multiple metadata such as [mp3.assoclink]
1351 $doc_obj->add_utf8_metadata ($cursection, "$doc_ext.assoclink", $assoc_form);
1352
1353 $equiv_form .= " $assoc_form";
1354
1355 # following are used for greenstone 3,
1356 $doc_obj->add_utf8_metadata ($cursection, "equivDocLink", $start_doclink_gs3);
1357 $doc_obj->add_utf8_metadata ($cursection, "equivDocIcon", $srcicon);
1358 $doc_obj->add_utf8_metadata ($cursection, "/equivDocLink", $end_doclink);
1359
1360 }
1361 $doc_obj->add_utf8_metadata ($cursection, "equivlink", $equiv_form);
1362 }
1363 elsif ($field eq "gsdlzipfilename") {
1364 # special case for when files have come out of a zip. source_path
1365 # (used for archives dbs and keeping track for incremental import)
1366 # must be set to the zip file name
1367 my $zip_filename = $metadata->{$field};
1368 # overwrite the source_path
1369 $doc_obj->set_source_path($zip_filename);
1370 # and set the metadata
1371 $zip_filename = &util::filename_within_collection($zip_filename);
1372 $zip_filename = $doc_obj->encode_filename($zip_filename, $self->{'file_rename_method'});
1373 $doc_obj->add_utf8_metadata ($cursection, $field, $zip_filename);
1374 }
1375 elsif (ref ($metadata->{$field}) eq "ARRAY") {
1376 map {
1377 $doc_obj->add_utf8_metadata ($cursection, $field, $_);
1378 } @{$metadata->{$field}};
1379 } else {
1380 $doc_obj->add_utf8_metadata ($cursection, $field, $metadata->{$field});
1381 }
1382 }
1383}
1384
1385
1386sub compile_stats {
1387 my $self = shift(@_);
1388 my ($stats) = @_;
1389
1390 $stats->{'num_processed'} += $self->{'num_processed'};
1391 $stats->{'num_not_processed'} += $self->{'num_not_processed'};
1392 $stats->{'num_archives'} += $self->{'num_archives'};
1393
1394}
1395sub associate_source_file {
1396 my $self = shift(@_);
1397
1398 my ($doc_obj, $filename) = @_;
1399 my $cursection = $doc_obj->get_top_section();
1400 my $assocfilename = $doc_obj->get_assocfile_from_sourcefile();
1401
1402 $doc_obj->associate_file($filename, $assocfilename, undef, $cursection);
1403 # srclink_file is now deprecated because of the "_" in the metadataname. Use srclinkFile
1404 $doc_obj->add_utf8_metadata ($cursection, "srclink_file", $doc_obj->get_sourcefile());
1405 $doc_obj->add_utf8_metadata ($cursection, "srclinkFile", $doc_obj->get_sourcefile());
1406}
1407
1408sub associate_cover_image {
1409 my $self = shift(@_);
1410 my ($doc_obj, $filename) = @_;
1411
1412 my $upgraded_filename = &util::upgrade_if_dos_filename($filename);
1413
1414 $filename =~ s/\.[^\\\/\.]+$/\.jpg/;
1415 $upgraded_filename =~ s/\.[^\\\/\.]+$/\.jpg/;
1416
1417 if (exists $self->{'covers_missing_cache'}->{$upgraded_filename}) {
1418 # don't stat() for existence e.g. for multiple document input files
1419 # (eg SplitPlug)
1420 return;
1421 }
1422
1423 my $top_section=$doc_obj->get_top_section();
1424
1425 if (&FileUtils::fileExists($upgraded_filename)) {
1426 $doc_obj->associate_source_file($filename);
1427 $doc_obj->associate_file($filename, "cover.jpg", "image/jpeg");
1428 $doc_obj->add_utf8_metadata($top_section, "hascover", 1);
1429 } else {
1430 my $upper_filename = $filename;
1431 my $upgraded_upper_filename = $upgraded_filename;
1432
1433 $upper_filename =~ s/jpg$/JPG/;
1434 $upgraded_upper_filename =~ s/jpg$/JPG/;
1435
1436 if (&FileUtils::fileExists($upgraded_upper_filename)) {
1437 $doc_obj->associate_source_file($upper_filename);
1438 $doc_obj->associate_file($upper_filename, "cover.jpg",
1439 "image/jpeg");
1440 $doc_obj->add_utf8_metadata($top_section, "hascover", 1);
1441 } else {
1442 # file doesn't exist, so record the fact that it's missing so
1443 # we don't stat() again (stat is slow)
1444 $self->{'covers_missing_cache'}->{$upgraded_filename} = 1;
1445 }
1446 }
1447
1448}
1449
1450
1451# Overridden by exploding plugins (eg. ISISPlug)
1452sub clean_up_after_exploding
1453{
1454 my $self = shift(@_);
1455}
1456
1457
1458
14591;
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