1 | ###########################################################################
|
---|
2 | #
|
---|
3 | # MARCPlug.pm -- basic MARC plugin
|
---|
4 | #
|
---|
5 | # A component of the Greenstone digital library software
|
---|
6 | # from the New Zealand Digital Library Project at the
|
---|
7 | # University of Waikato, New Zealand.
|
---|
8 | #
|
---|
9 | # Copyright (C) 2002 New Zealand Digital Library Project
|
---|
10 | #
|
---|
11 | # This program is free software; you can redistribute it and/or modify
|
---|
12 | # it under the terms of the GNU General Public License as published by
|
---|
13 | # the Free Software Foundation; either version 2 of the License, or
|
---|
14 | # (at your option) any later version.
|
---|
15 | #
|
---|
16 | # This program is distributed in the hope that it will be useful,
|
---|
17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
19 | # GNU General Public License for more details.
|
---|
20 | #
|
---|
21 | # You should have received a copy of the GNU General Public License
|
---|
22 | # along with this program; if not, write to the Free Software
|
---|
23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
---|
24 | #
|
---|
25 | ###########################################################################
|
---|
26 |
|
---|
27 | package MARCPlug;
|
---|
28 |
|
---|
29 | use SplitPlug;
|
---|
30 |
|
---|
31 | use unicode;
|
---|
32 | use util;
|
---|
33 |
|
---|
34 | use strict;
|
---|
35 | no strict 'refs'; # allow filehandles to be variables and viceversa
|
---|
36 |
|
---|
37 | sub BEGIN {
|
---|
38 | @MARCPlug::ISA = ('SplitPlug');
|
---|
39 | unshift (@INC, "$ENV{'GSDLHOME'}/perllib/cpan");
|
---|
40 | }
|
---|
41 |
|
---|
42 | my $arguments =
|
---|
43 | [ { 'name' => "metadata_mapping",
|
---|
44 | 'desc' => "{MARCPlug.metadata_mapping}",
|
---|
45 | 'type' => "string",
|
---|
46 | 'deft' => "marctodc.txt",
|
---|
47 | 'reqd' => "no" },
|
---|
48 | { 'name' => "process_exp",
|
---|
49 | 'desc' => "{BasPlug.process_exp}",
|
---|
50 | 'type' => "regexp",
|
---|
51 | 'reqd' => "no",
|
---|
52 | 'deft' => &get_default_process_exp() },
|
---|
53 | { 'name' => "split_exp",
|
---|
54 | 'desc' => "{SplitPlug.split_exp}",
|
---|
55 | 'type' => "regexp",
|
---|
56 | 'reqd' => "no",
|
---|
57 | 'deft' => &get_default_split_exp() }
|
---|
58 | ];
|
---|
59 |
|
---|
60 | my $options = { 'name' => "MARCPlug",
|
---|
61 | 'desc' => "{MARCPlug.desc}",
|
---|
62 | 'abstract' => "no",
|
---|
63 | 'inherits' => "yes",
|
---|
64 | 'explodes' => "yes",
|
---|
65 | 'args' => $arguments };
|
---|
66 |
|
---|
67 | require MARC::Record;
|
---|
68 | require MARC::Batch;
|
---|
69 | #use MARC::Record;
|
---|
70 | #use MARC::Batch;
|
---|
71 |
|
---|
72 | sub new {
|
---|
73 | my ($class) = shift (@_);
|
---|
74 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
|
---|
75 | push(@$pluginlist, $class);
|
---|
76 |
|
---|
77 | if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
|
---|
78 | if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
|
---|
79 |
|
---|
80 | my $self = new SplitPlug($pluginlist, $inputargs, $hashArgOptLists);
|
---|
81 |
|
---|
82 | $self->{'type'} = "";
|
---|
83 |
|
---|
84 | return bless $self, $class;
|
---|
85 | }
|
---|
86 |
|
---|
87 | sub init {
|
---|
88 | my $self = shift (@_);
|
---|
89 | my ($verbosity, $outhandle, $failhandle) = @_;
|
---|
90 |
|
---|
91 | my @metadata_mapping = ();
|
---|
92 |
|
---|
93 | # read in the metadata mapping file
|
---|
94 | my $mm_file =
|
---|
95 | &util::filename_cat( $ENV{'GSDLHOME'}, "etc", $self->{'metadata_mapping'} );
|
---|
96 |
|
---|
97 | if (!-e $mm_file)
|
---|
98 | {
|
---|
99 |
|
---|
100 | my $msg = "MARCPlug ERROR: Can't locate mapping file \"" .
|
---|
101 | $self->{'metadata_mapping'} . "\".\n This file should be at $mm_file\n" .
|
---|
102 | " No marc files can be processed.\n";
|
---|
103 |
|
---|
104 | print $outhandle $msg;
|
---|
105 | print $failhandle $msg;
|
---|
106 | $self->{'metadata_mapping'} = undef;
|
---|
107 | # We pick up the error in process() if there is no $mm_file
|
---|
108 | # If we exit here, then pluginfo.pl will exit too!
|
---|
109 | }
|
---|
110 | elsif (open(MMIN, "<$mm_file"))
|
---|
111 | {
|
---|
112 | my $l=1;
|
---|
113 | my $line;
|
---|
114 | while (defined($line=<MMIN>))
|
---|
115 | {
|
---|
116 | chomp $line;
|
---|
117 | if ($line =~ m/^(\d+)\s*->\s*([\w\^]+)$/)
|
---|
118 | {
|
---|
119 | my $marc_info = $1;
|
---|
120 | my $gsdl_info = $2;
|
---|
121 | my $mapping = { 'marc' => $marc_info, 'gsdl' => $gsdl_info };
|
---|
122 | push(@metadata_mapping,$mapping);
|
---|
123 | }
|
---|
124 | elsif ($line !~ m/^\#/ # allow comments (# in first column)
|
---|
125 | && $line !~ m/^\s*$/) # allow blank lines
|
---|
126 | {
|
---|
127 | print $outhandle "Parse error on line $l of $mm_file:\n";
|
---|
128 | print $outhandle " \"$line\"\n";
|
---|
129 | }
|
---|
130 | $l++
|
---|
131 | }
|
---|
132 | close(MMIN);
|
---|
133 | }
|
---|
134 | else
|
---|
135 | {
|
---|
136 | print STDERR "Unable to open $mm_file: $!\n";
|
---|
137 | }
|
---|
138 |
|
---|
139 | $self->{'metadata_mapping'} = \@metadata_mapping;
|
---|
140 |
|
---|
141 | $self->SUPER::init(@_);
|
---|
142 | }
|
---|
143 |
|
---|
144 |
|
---|
145 | sub get_default_process_exp {
|
---|
146 | my $self = shift (@_);
|
---|
147 |
|
---|
148 | return q^(?i)(\.marc)$^;
|
---|
149 | }
|
---|
150 |
|
---|
151 |
|
---|
152 | sub get_default_split_exp {
|
---|
153 | # \r\n for msdos eol, \n for unix
|
---|
154 | return q^\r?\n\s*\r?\n|\[\w+\]Record type: USmarc^;
|
---|
155 | }
|
---|
156 |
|
---|
157 |
|
---|
158 |
|
---|
159 | # The bulk of this function is based on read_line in multiread.pm
|
---|
160 | # Unable to use read_line original because it expects to get its input
|
---|
161 | # from a file. Here the line to be converted is passed in as a string
|
---|
162 |
|
---|
163 | sub to_utf8
|
---|
164 | {
|
---|
165 | my $self = shift (@_);
|
---|
166 | my ($encoding, $line) = @_;
|
---|
167 |
|
---|
168 | if ($encoding eq "iso_8859_1") {
|
---|
169 | # we'll use ascii2utf8() for this as it's faster than going
|
---|
170 | # through convert2unicode()
|
---|
171 | return &unicode::ascii2utf8 (\$line);
|
---|
172 | }
|
---|
173 |
|
---|
174 | # everything else uses unicode::convert2unicode
|
---|
175 | return &unicode::unicode2utf8 (&unicode::convert2unicode ($encoding, \$line));
|
---|
176 | }
|
---|
177 |
|
---|
178 |
|
---|
179 | sub read_file {
|
---|
180 | my $self = shift (@_);
|
---|
181 | my ($filename, $encoding, $language, $textref) = @_;
|
---|
182 |
|
---|
183 | $self->{'readfile_encoding'}->{$filename} = $encoding;
|
---|
184 |
|
---|
185 |
|
---|
186 | if (!-r $filename)
|
---|
187 | {
|
---|
188 | my $outhandle = $self->{'outhandle'};
|
---|
189 | print $outhandle "Read permission denied for $filename\n" if $self->{'verbosity'};
|
---|
190 | return;
|
---|
191 | }
|
---|
192 |
|
---|
193 | ##handle ascii marc
|
---|
194 | #test whether this is ascii marc file
|
---|
195 | if (open (FILE, $filename)) {
|
---|
196 | while (defined (my $line = <FILE>)) {
|
---|
197 | $$textref .= $line;
|
---|
198 | if ($line =~ /\[\w+\]Record type:/){
|
---|
199 | undef $/;
|
---|
200 | $$textref .= <FILE>;
|
---|
201 | $/ = "\n";
|
---|
202 | $self->{'type'} = "ascii";
|
---|
203 | close FILE;
|
---|
204 | return;
|
---|
205 | }
|
---|
206 | }
|
---|
207 | close FILE;
|
---|
208 | }
|
---|
209 |
|
---|
210 |
|
---|
211 | $$textref = "";
|
---|
212 | my @marc_entries = ();
|
---|
213 |
|
---|
214 | my $batch = new MARC::Batch( 'USMARC', $filename );
|
---|
215 | while ( my $marc = $batch->next )
|
---|
216 | {
|
---|
217 | push(@marc_entries,$marc);
|
---|
218 | $$textref .= $marc->as_formatted();
|
---|
219 | $$textref .= "\n\n"; # for SplitPlug - see default_split_exp above...
|
---|
220 | }
|
---|
221 |
|
---|
222 | $self->{'marc_entries'}->{$filename} = \@marc_entries;
|
---|
223 | }
|
---|
224 |
|
---|
225 |
|
---|
226 |
|
---|
227 | # do plugin specific processing of doc_obj
|
---|
228 | # This gets done for each record found by SplitPlug in marc files.
|
---|
229 | sub process {
|
---|
230 | my $self = shift (@_);
|
---|
231 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
|
---|
232 |
|
---|
233 | my $outhandle = $self->{'outhandle'};
|
---|
234 | my $filename = &util::filename_cat($base_dir, $file);
|
---|
235 |
|
---|
236 | if (! defined($self->{'metadata_mapping'}))
|
---|
237 | {
|
---|
238 | print $outhandle "MARCPlug: no metadata file! Can't process $file\n";
|
---|
239 | return undef;
|
---|
240 | }
|
---|
241 |
|
---|
242 | print STDERR "<Processing n='$file' p='MARCPlug'>\n" if ($gli);
|
---|
243 | print $outhandle "MARCPlug: processing $file\n"
|
---|
244 | if $self->{'verbosity'} > 1;
|
---|
245 |
|
---|
246 | my $cursection = $doc_obj->get_top_section();
|
---|
247 |
|
---|
248 | # Add fileFormat as the metadata
|
---|
249 | $doc_obj->add_metadata($cursection, "FileFormat", "MARC");
|
---|
250 |
|
---|
251 | my $marc_entries = $self->{'marc_entries'}->{$filename};
|
---|
252 | my $marc = shift(@$marc_entries);
|
---|
253 |
|
---|
254 | my $encoding = $self->{'readfile_encoding'}->{$filename};
|
---|
255 |
|
---|
256 | if ($self->{'type'} ne "ascii" ){
|
---|
257 | $self->extract_metadata ($marc, $metadata, $encoding, $doc_obj, $cursection);
|
---|
258 | }
|
---|
259 | else{
|
---|
260 | $self->extract_ascii_metadata ($$textref,$metadata,$doc_obj, $cursection);
|
---|
261 | }
|
---|
262 |
|
---|
263 | # add spaces after the sub-field markers, for word boundaries
|
---|
264 | $$textref =~ s/^(.{6} _\w)/$1 /gm;
|
---|
265 |
|
---|
266 | # add text to document object
|
---|
267 | $$textref =~ s/</</g;
|
---|
268 | $$textref =~ s/>/>/g;
|
---|
269 |
|
---|
270 | $$textref = $self->to_utf8($encoding,$$textref);
|
---|
271 |
|
---|
272 | print $outhandle " Adding Marc Record:\n",substr($$textref,0,40), " ...\n"
|
---|
273 | if $self->{'verbosity'} > 2;
|
---|
274 |
|
---|
275 | # line wrapping
|
---|
276 | $$textref = &wrap_text_in_columns($$textref, 64);
|
---|
277 | $$textref = "<pre>\n" . $$textref . "</pre>\n"; # HTML formatting...
|
---|
278 |
|
---|
279 | $doc_obj->add_utf8_text($cursection, $$textref);
|
---|
280 |
|
---|
281 | return 1;
|
---|
282 | }
|
---|
283 |
|
---|
284 | sub wrap_text_in_columns
|
---|
285 | {
|
---|
286 | my ($text, $columnwidth) = @_;
|
---|
287 | my $newtext = "";
|
---|
288 | my $linelength = 0;
|
---|
289 |
|
---|
290 | # Break the text into words, and display one at a time
|
---|
291 | my @words = split(/ /, $text);
|
---|
292 |
|
---|
293 | foreach my $word (@words) {
|
---|
294 | # If printing this word would exceed the column end, start a new line
|
---|
295 | if (($linelength + length($word)) >= $columnwidth) {
|
---|
296 | $newtext .= "\n";
|
---|
297 | $linelength = 0;
|
---|
298 | }
|
---|
299 |
|
---|
300 | # Write the word
|
---|
301 | $newtext .= " $word";
|
---|
302 | if ($word =~ /\n/) {
|
---|
303 | $linelength = 0;
|
---|
304 | } else {
|
---|
305 | $linelength = $linelength + length(" $word");
|
---|
306 | }
|
---|
307 | }
|
---|
308 |
|
---|
309 | $newtext .= "\n";
|
---|
310 | return $newtext;
|
---|
311 | }
|
---|
312 |
|
---|
313 |
|
---|
314 | sub extract_metadata
|
---|
315 | {
|
---|
316 | my $self = shift (@_);
|
---|
317 | my ($marc, $metadata, $encoding, $doc_obj, $section) = @_;
|
---|
318 | my $outhandle = $self->{'outhandle'};
|
---|
319 |
|
---|
320 | if (!defined $marc){
|
---|
321 | return;
|
---|
322 | }
|
---|
323 |
|
---|
324 | my $metadata_mapping = $self->{'metadata_mapping'};
|
---|
325 | my $mm;
|
---|
326 |
|
---|
327 | foreach $mm ( @$metadata_mapping )
|
---|
328 | {
|
---|
329 | my $marc_field = $mm->{'marc'};
|
---|
330 |
|
---|
331 | my @metavalues = $marc->field($marc_field);
|
---|
332 |
|
---|
333 | if (scalar(@metavalues)>0)
|
---|
334 | {
|
---|
335 | my $metaname = $mm->{'gsdl'};
|
---|
336 | my $metavalue;
|
---|
337 | foreach $metavalue ( @metavalues )
|
---|
338 | {
|
---|
339 | my $metavalue_str = $self->to_utf8($encoding,$metavalue->as_string());
|
---|
340 | $doc_obj->add_utf8_metadata ($section, $metaname, $metavalue_str);
|
---|
341 | }
|
---|
342 | }
|
---|
343 | }
|
---|
344 | }
|
---|
345 |
|
---|
346 | sub extract_ascii_metadata
|
---|
347 | {
|
---|
348 | my $self = shift (@_);
|
---|
349 | my ($text, $metadata,$doc_obj, $section) = @_;
|
---|
350 | my $outhandle = $self->{'outhandle'};
|
---|
351 | my $metadata_mapping = $self->{'metadata_mapping'};
|
---|
352 | ## get fields
|
---|
353 | my @fields = split(/[\n\r]+/,$text);
|
---|
354 | my $marc_mapping ={};
|
---|
355 |
|
---|
356 | foreach my $field (@fields){
|
---|
357 | if ($field ne ""){
|
---|
358 | $field =~ /^(\d\d\d)\s/;
|
---|
359 | my $code = $1;
|
---|
360 | $field = $';
|
---|
361 | ##get subfields
|
---|
362 | my @subfields = split(/\$/,$field);
|
---|
363 | my $i=0;
|
---|
364 | $marc_mapping->{$code} = [];
|
---|
365 | foreach my $subfield (@subfields){
|
---|
366 | if ($i == 0){
|
---|
367 | ##print STDERR $subfield."\n";
|
---|
368 | push(@{$marc_mapping->{$code}},"info");
|
---|
369 | push(@{$marc_mapping->{$code}},$subfield);
|
---|
370 |
|
---|
371 | $i++;
|
---|
372 | }
|
---|
373 | else{
|
---|
374 | $subfield =~ /(\w)\s/;
|
---|
375 | ##print STDERR "$1=>$'\n";
|
---|
376 | push(@{$marc_mapping->{$code}},$1);
|
---|
377 | push(@{$marc_mapping->{$code}},$');
|
---|
378 | }
|
---|
379 | }
|
---|
380 | }
|
---|
381 | }
|
---|
382 |
|
---|
383 |
|
---|
384 | foreach my $mm ( @$metadata_mapping )
|
---|
385 | {
|
---|
386 | my $marc_field = $mm->{'marc'};
|
---|
387 |
|
---|
388 | my $matched_field = $marc_mapping->{$marc_field};
|
---|
389 | my $subfield = undef;
|
---|
390 |
|
---|
391 | if (defined $matched_field){
|
---|
392 | ## test whether this field has subfield
|
---|
393 | if ($marc_field =~ /\d\d\d(\w)/){
|
---|
394 | $subfield = $1;
|
---|
395 | }
|
---|
396 | my $metaname = $mm->{'gsdl'};
|
---|
397 |
|
---|
398 | my $metavalue;
|
---|
399 | if (defined $subfield){
|
---|
400 | my %mapped_subfield = {@$matched_field};
|
---|
401 | $metavalue = $mapped_subfield{$subfield};
|
---|
402 | }
|
---|
403 | else{ ## get all values except info
|
---|
404 | my $i =0;
|
---|
405 | foreach my $value (@$matched_field){
|
---|
406 | if ($i%2 != 0 and $i != 1){
|
---|
407 | $metavalue .= $value." ";
|
---|
408 | }
|
---|
409 | $i++;
|
---|
410 | }
|
---|
411 | }
|
---|
412 |
|
---|
413 | ## escape [ and ]
|
---|
414 | $metavalue =~ s/\[/\\\[/g;
|
---|
415 | $metavalue =~ s/\]/\\\]/g;
|
---|
416 | ##print STDERR "$metaname=$metavalue\n";
|
---|
417 | $doc_obj->add_metadata ($section, $metaname, $metavalue) ;
|
---|
418 | }
|
---|
419 |
|
---|
420 | }
|
---|
421 |
|
---|
422 | }
|
---|
423 |
|
---|
424 |
|
---|
425 | 1;
|
---|