C4/Record.pm

   1 package C4::Record;
   2 #
   3 # Copyright 2006 (C) LibLime
   4 # Parts copyright 2010 BibLibre
   5 # Part copyright 2015 Universidad de El Salvador
   6 #
   7 # This file is part of Koha.
   8 #
   9 # Koha is free software; you can redistribute it and/or modify it
  10 # under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 3 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # Koha is distributed in the hope that it will be useful, but
  15 # WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  21
  22 use Modern::Perl;
  23
  24 # please specify in which methods a given module is used
  25 use MARC::Record; # marc2marcxml, marcxml2marc, changeEncoding
  26 use MARC::File::XML; # marc2marcxml, marcxml2marc, changeEncoding
  27 use Biblio::EndnoteStyle;
  28 use Unicode::Normalize; # _entity_encode
  29 use C4::Biblio; #marc2bibtex
  30 use C4::Koha; #marc2csv
  31 use C4::XSLT ();
  32 use YAML; #marcrecords2csv
  33 use Template;
  34 use Text::CSV::Encoded; #marc2csv
  35 use Koha::Items;
  36 use Koha::SimpleMARC qw(read_field);
  37 use Koha::XSLT::Base;
  38 use Koha::CsvProfiles;
  39 use Koha::AuthorisedValues;
  40 use Carp;
  41
  42 use vars qw(@ISA @EXPORT);
  43
  44
  45 @ISA = qw(Exporter);
  46
  47 # only export API methods
  48
  49 @EXPORT = qw(
  50   &marc2endnote
  51   &marc2marc
  52   &marc2marcxml
  53   &marcxml2marc
  54   &marc2dcxml
  55   &marc2modsxml
  56   &marc2madsxml
  57   &marc2bibtex
  58   &marc2csv
  59   &changeEncoding
  60 );
  61
  62 =head1 NAME
  63
  64 C4::Record - MARC, MARCXML, DC, MODS, XML, etc. Record Management Functions and API
  65
  66 =head1 SYNOPSIS
  67
  68 New in Koha 3.x. This module handles all record-related management functions.
  69
  70 =head1 API (EXPORTED FUNCTIONS)
  71
  72 =head2 marc2marc - Convert from one flavour of ISO-2709 to another
  73
  74   my ($error,$newmarc) = marc2marc($marc,$to_flavour,$from_flavour,$encoding);
  75
  76 Returns an ISO-2709 scalar
  77
  78 =cut
  79
  80 sub marc2marc {
  81         my ($marc,$to_flavour,$from_flavour,$encoding) = @_;
  82         my $error;
  83     if ($to_flavour && $to_flavour =~ m/marcstd/) {
  84         my $marc_record_obj;
  85         if ($marc =~ /^MARC::Record/) { # it's already a MARC::Record object
  86             $marc_record_obj = $marc;
  87         } else { # it's not a MARC::Record object, make it one
  88             eval { $marc_record_obj = MARC::Record->new_from_usmarc($marc) }; # handle exceptions
  89
  90 # conversion to MARC::Record object failed, populate $error
  91                 if ($@) { $error .="\nCreation of MARC::Record object failed: ".$MARC::File::ERROR };
  92         }
  93         unless ($error) {
  94             my @privatefields;
  95             foreach my $field ($marc_record_obj->fields()) {
  96                 if ($field->tag() =~ m/9/ && ($field->tag() != '490' || C4::Context->preference("marcflavour") eq 'UNIMARC')) {
  97                     push @privatefields, $field;
  98                 } elsif (! ($field->is_control_field())) {
  99                     $field->delete_subfield(code => '9') if ($field->subfield('9'));
 100                 }
 101             }
 102             $marc_record_obj->delete_field($_) for @privatefields;
 103             $marc = $marc_record_obj->as_usmarc();
 104         }
 105     } else {
 106         $error = "Feature not yet implemented\n";
 107     }
 108         return ($error,$marc);
 109 }
 110
 111 =head2 marc2marcxml - Convert from ISO-2709 to MARCXML
 112
 113   my ($error,$marcxml) = marc2marcxml($marc,$encoding,$flavour);
 114
 115 Returns a MARCXML scalar
 116
 117 C<$marc> - an ISO-2709 scalar or MARC::Record object
 118
 119 C<$encoding> - UTF-8 or MARC-8 [UTF-8]
 120
 121 C<$flavour> - MARC21 or UNIMARC
 122
 123 C<$dont_entity_encode> - a flag that instructs marc2marcxml not to entity encode the xml before returning (optional)
 124
 125 =cut
 126
 127 sub marc2marcxml {
 128         my ($marc,$encoding,$flavour,$dont_entity_encode) = @_;
 129         my $error; # the error string
 130         my $marcxml; # the final MARCXML scalar
 131
 132         # test if it's already a MARC::Record object, if not, make it one
 133         my $marc_record_obj;
 134         if ($marc =~ /^MARC::Record/) { # it's already a MARC::Record object
 135                 $marc_record_obj = $marc;
 136         } else { # it's not a MARC::Record object, make it one
 137                 eval { $marc_record_obj = MARC::Record->new_from_usmarc($marc) }; # handle exceptions
 138
 139                 # conversion to MARC::Record object failed, populate $error
 140                 if ($@) { $error .="\nCreation of MARC::Record object failed: ".$MARC::File::ERROR };
 141         }
 142         # only proceed if no errors so far
 143         unless ($error) {
 144
 145                 # check the record for warnings
 146                 my @warnings = $marc_record_obj->warnings();
 147                 if (@warnings) {
 148                         warn "\nWarnings encountered while processing ISO-2709 record with title \"".$marc_record_obj->title()."\":\n";
 149                         foreach my $warn (@warnings) { warn "\t".$warn };
 150                 }
 151                 unless($encoding) {$encoding = "UTF-8"}; # set default encoding
 152                 unless($flavour) {$flavour = C4::Context->preference("marcflavour")}; # set default MARC flavour
 153
 154                 # attempt to convert the record to MARCXML
 155                 eval { $marcxml = $marc_record_obj->as_xml_record($flavour) }; #handle exceptions
 156
 157                 # record creation failed, populate $error
 158                 if ($@) {
 159                         $error .= "Creation of MARCXML failed:".$MARC::File::ERROR;
 160                         $error .= "Additional information:\n";
 161                         my @warnings = $@->warnings();
 162                         foreach my $warn (@warnings) { $error.=$warn."\n" };
 163
 164                 # record creation was successful
 165         } else {
 166
 167                         # check the record for warning flags again (warnings() will be cleared already if there was an error, see above block
 168                         @warnings = $marc_record_obj->warnings();
 169                         if (@warnings) {
 170                                 warn "\nWarnings encountered while processing ISO-2709 record with title \"".$marc_record_obj->title()."\":\n";
 171                                 foreach my $warn (@warnings) { warn "\t".$warn };
 172                         }
 173                 }
 174
 175                 # only proceed if no errors so far
 176                 unless ($error) {
 177
 178                         # entity encode the XML unless instructed not to
 179                 unless ($dont_entity_encode) {
 180                         my ($marcxml_entity_encoded) = _entity_encode($marcxml);
 181                         $marcxml = $marcxml_entity_encoded;
 182                 }
 183                 }
 184         }
 185         # return result to calling program
 186         return ($error,$marcxml);
 187 }
 188
 189 =head2 marcxml2marc - Convert from MARCXML to ISO-2709
 190
 191   my ($error,$marc) = marcxml2marc($marcxml,$encoding,$flavour);
 192
 193 Returns an ISO-2709 scalar
 194
 195 C<$marcxml> - a MARCXML record
 196
 197 C<$encoding> - UTF-8 or MARC-8 [UTF-8]
 198
 199 C<$flavour> - MARC21 or UNIMARC
 200
 201 =cut
 202
 203 sub marcxml2marc {
 204     my ($marcxml,$encoding,$flavour) = @_;
 205         my $error; # the error string
 206         my $marc; # the final ISO-2709 scalar
 207         unless($encoding) {$encoding = "UTF-8"}; # set the default encoding
 208         unless($flavour) {$flavour = C4::Context->preference("marcflavour")}; # set the default MARC flavour
 209
 210         # attempt to do the conversion
 211         eval { $marc = MARC::Record->new_from_xml($marcxml,$encoding,$flavour) }; # handle exceptions
 212
 213         # record creation failed, populate $error
 214         if ($@) {$error .="\nCreation of MARCXML Record failed: ".$@;
 215                 $error.=$MARC::File::ERROR if ($MARC::File::ERROR);
 216                 };
 217         # return result to calling program
 218         return ($error,$marc);
 219 }
 220
 221 =head2 marc2dcxml - Convert from ISO-2709 to Dublin Core
 222
 223     my dcxml = marc2dcxml ($marc, $xml, $biblionumber, $format);
 224
 225 EXAMPLE
 226
 227     my dcxml = marc2dcxml (undef, undef, 1, "oaidc");
 228
 229 Convert MARC or MARCXML to Dublin Core metadata (XSLT Transformation),
 230 optionally can get an XML directly from biblio_metadata
 231 without item information. This method take into consideration the syspref
 232 'marcflavour' (UNIMARC, MARC21 and NORMARC).
 233 Return an XML file with the format defined in C<$format>
 234
 235 C<$marc> - an ISO-2709 scalar or MARC::Record object
 236
 237 C<$xml> - a MARCXML file
 238
 239 C<$biblionumber> - biblionumber for database access
 240
 241 C<$format> - accept three type of DC formats (oaidc, srwdc, and rdfdc )
 242
 243 =cut
 244
 245 sub marc2dcxml {
 246     my ( $marc, $xml, $biblionumber, $format ) = @_;
 247
 248     # global variables
 249     my ( $marcxml, $record, $output );
 250
 251     # set the default path for intranet xslts
 252     # differents xslts to process (OAIDC, SRWDC and RDFDC)
 253     my $xsl = C4::Context->config('intrahtdocs') . '/prog/en/xslt/' .
 254               C4::Context->preference('marcflavour') . 'slim2' . uc ( $format ) . '.xsl';
 255
 256     if ( defined $marc ) {
 257         # no need to catch errors or warnings marc2marcxml do it instead
 258         $marcxml = C4::Record::marc2marcxml( $marc );
 259     } elsif ( not defined $xml and defined $biblionumber ) {
 260         # get MARCXML biblio directly without item information
 261         $marcxml = C4::Biblio::GetXmlBiblio( $biblionumber );
 262     } else {
 263         $marcxml = $xml;
 264     }
 265
 266     # only proceed if MARC21 or UNIMARC; else clause is executed if marcflavour set it to NORMARC
 267     # generate MARC::Record object to see if not a marcxml record
 268     unless ( C4::Context->preference('marcflavour') eq 'NORMARC' ) {
 269         eval { $record = MARC::Record->new_from_xml(
 270                          $marcxml,
 271                          'UTF-8',
 272                          C4::Context->preference('marcflavour')
 273                );
 274         };
 275     } else {
 276         eval { $record = MARC::Record->new_from_xml(
 277                          $marcxml,
 278                         'UTF-8',
 279                         'MARC21'
 280                );
 281         };
 282     }
 283
 284     # conversion to MARC::Record object failed
 285     if ( $@ ) {
 286         croak "Creation of MARC::Record object failed.";
 287     } elsif ( $record->warnings() ) {
 288         carp "Warnings encountered while processing ISO-2709 record.\n";
 289         my @warnings = $record->warnings();
 290         foreach my $warn (@warnings) {
 291             carp "\t". $warn;
 292         };
 293     } elsif ( $record =~ /^MARC::Record/ ) { # if OK makes xslt transformation
 294         my $xslt_engine = Koha::XSLT::Base->new;
 295         if ( $format =~ /^(dc|oaidc|srwdc|rdfdc)$/i ) {
 296             $output = $xslt_engine->transform( $marcxml, $xsl );
 297         } else {
 298             croak "The format argument ($format) not accepted.\n" .
 299                   "Please pass a valid format (oaidc, srwdc, or rdfdc)\n";
 300         }
 301         my $err = $xslt_engine->err; # error code
 302         if ( $err ) {
 303             croak "Error $err while processing\n";
 304         } else {
 305             return $output;
 306         }
 307     }
 308 }
 309
 310 =head2 marc2modsxml - Convert from ISO-2709 to MODS
 311
 312   my $modsxml = marc2modsxml($marc);
 313
 314 Returns a MODS scalar
 315
 316 =cut
 317
 318 sub marc2modsxml {
 319     my ($marc) = @_;
 320     return _transformWithStylesheet($marc, "/prog/en/xslt/MARC21slim2MODS3-1.xsl");
 321 }
 322
 323 =head2 marc2madsxml - Convert from ISO-2709 to MADS
 324
 325   my $madsxml = marc2madsxml($marc);
 326
 327 Returns a MADS scalar
 328
 329 =cut
 330
 331 sub marc2madsxml {
 332     my ($marc) = @_;
 333     return _transformWithStylesheet($marc, "/prog/en/xslt/MARC21slim2MADS.xsl");
 334 }
 335
 336 =head2 _transformWithStylesheet - Transform a MARC record with a stylesheet
 337
 338     my $xml = _transformWithStylesheet($marc, $stylesheet)
 339
 340 Returns the XML scalar result of the transformation. $stylesheet should
 341 contain the path to a stylesheet under intrahtdocs.
 342
 343 =cut
 344
 345 sub _transformWithStylesheet {
 346     my ($marc, $stylesheet) = @_;
 347     # grab the XML, run it through our stylesheet, push it out to the browser
 348     my $xmlrecord = marc2marcxml($marc);
 349     my $xslfile = C4::Context->config('intrahtdocs') . $stylesheet;
 350     return C4::XSLT::engine->transform($xmlrecord, $xslfile);
 351 }
 352
 353 sub marc2endnote {
 354     my ($marc) = @_;
 355         my $marc_rec_obj =  MARC::Record->new_from_usmarc($marc);
 356     my ( $abstract, $f260a, $f710a );
 357     my $f260 = $marc_rec_obj->field('260');
 358     if ($f260) {
 359         $f260a = $f260->subfield('a') if $f260;
 360     }
 361     my $f710 = $marc_rec_obj->field('710');
 362     if ($f710) {
 363         $f710a = $f710->subfield('a');
 364     }
 365     my $f500 = $marc_rec_obj->field('500');
 366     if ($f500) {
 367         $abstract = $f500->subfield('a');
 368     }
 369     my $fields = {
 370         DB => C4::Context->preference("LibraryName"),
 371         Title => $marc_rec_obj->title(),
 372         Author => $marc_rec_obj->author(),
 373         Publisher => $f710a,
 374         City => $f260a,
 375         Year => $marc_rec_obj->publication_date,
 376         Abstract => $abstract,
 377     };
 378     my $style = Biblio::EndnoteStyle->new();
 379     my $template;
 380     $template.= "DB - DB\n" if C4::Context->preference("LibraryName");
 381     $template.="T1 - Title\n" if $marc_rec_obj->title();
 382     $template.="A1 - Author\n" if $marc_rec_obj->author();
 383     $template.="PB - Publisher\n" if  $f710a;
 384     $template.="CY - City\n" if $f260a;
 385     $template.="Y1 - Year\n" if $marc_rec_obj->publication_date;
 386     $template.="AB - Abstract\n" if $abstract;
 387     my ($text, $errmsg) = $style->format($template, $fields);
 388     return ($text);
 389
 390 }
 391
 392 =head2 marc2csv - Convert several records from UNIMARC to CSV
 393
 394   my ($csv) = marc2csv($biblios, $csvprofileid, $itemnumbers);
 395
 396 Pre and postprocessing can be done through a YAML file
 397
 398 Returns a CSV scalar
 399
 400 C<$biblio> - a list of biblionumbers
 401
 402 C<$csvprofileid> - the id of the CSV profile to use for the export (see export_format.export_format_id)
 403
 404 C<$itemnumbers> - a list of itemnumbers to export
 405
 406 =cut
 407
 408 sub marc2csv {
 409     my ($biblios, $id, $itemnumbers) = @_;
 410     $itemnumbers ||= [];
 411     my $output;
 412     my $csv = Text::CSV::Encoded->new();
 413
 414     # Getting yaml file
 415     my $configfile = "../tools/csv-profiles/$id.yaml";
 416     my ($preprocess, $postprocess, $fieldprocessing);
 417     if (-e $configfile){
 418         ($preprocess,$postprocess, $fieldprocessing) = YAML::LoadFile($configfile);
 419     }
 420
 421     # Preprocessing
 422     eval $preprocess if ($preprocess); ## no critic (StringyEval)
 423
 424     my $firstpass = 1;
 425     if ( @$itemnumbers ) {
 426         for my $itemnumber ( @$itemnumbers) {
 427             my $item = Koha::Items->find( $itemnumber );
 428             my $biblionumber = $item->biblio->biblionumber;
 429             $output .= marcrecord2csv( $biblionumber, $id, $firstpass, $csv, $fieldprocessing, [$itemnumber] ) // '';
 430             $firstpass = 0;
 431         }
 432     } else {
 433         foreach my $biblio (@$biblios) {
 434             $output .= marcrecord2csv( $biblio, $id, $firstpass, $csv, $fieldprocessing ) // '';
 435             $firstpass = 0;
 436         }
 437     }
 438
 439     # Postprocessing
 440     eval $postprocess if ($postprocess); ## no critic (StringyEval)
 441
 442     return $output;
 443 }
 444
 445 =head2 marcrecord2csv - Convert a single record from UNIMARC to CSV
 446
 447   my ($csv) = marcrecord2csv($biblio, $csvprofileid, $header);
 448
 449 Returns a CSV scalar
 450
 451 C<$biblio> - a biblionumber
 452
 453 C<$csvprofileid> - the id of the CSV profile to use for the export (see export_format.export_format_id)
 454
 455 C<$header> - true if the headers are to be printed (typically at first pass)
 456
 457 C<$csv> - an already initialised Text::CSV object
 458
 459 C<$fieldprocessing>
 460
 461 C<$itemnumbers> a list of itemnumbers to export
 462
 463 =cut
 464
 465 sub marcrecord2csv {
 466     my ($biblio, $id, $header, $csv, $fieldprocessing, $itemnumbers) = @_;
 467     my $output;
 468
 469     # Getting the record
 470     my $record = GetMarcBiblio({ biblionumber => $biblio });
 471     return unless $record;
 472     C4::Biblio::EmbedItemsInMarcBiblio({
 473         marc_record  => $record,
 474         biblionumber => $biblio,
 475         item_numbers => $itemnumbers });
 476     # Getting the framework
 477     my $frameworkcode = GetFrameworkCode($biblio);
 478
 479     # Getting information about the csv profile
 480     my $profile = Koha::CsvProfiles->find($id);
 481
 482     # Getting output encoding
 483     my $encoding          = $profile->encoding || 'utf8';
 484     # Getting separators
 485     my $csvseparator      = $profile->csv_separator      || ',';
 486     my $fieldseparator    = $profile->field_separator    || '#';
 487     my $subfieldseparator = $profile->subfield_separator || '|';
 488
 489     # TODO: Be more generic (in case we have to handle other protected chars or more separators)
 490     if ($csvseparator eq '\t') { $csvseparator = "\t" }
 491     if ($fieldseparator eq '\t') { $fieldseparator = "\t" }
 492     if ($subfieldseparator eq '\t') { $subfieldseparator = "\t" }
 493     if ($csvseparator eq '\n') { $csvseparator = "\n" }
 494     if ($fieldseparator eq '\n') { $fieldseparator = "\n" }
 495     if ($subfieldseparator eq '\n') { $subfieldseparator = "\n" }
 496
 497     $csv = $csv->encoding_out($encoding) ;
 498     $csv->sep_char($csvseparator);
 499
 500     # Getting the marcfields
 501     my $marcfieldslist = $profile->content;
 502
 503     # Getting the marcfields as an array
 504     my @marcfieldsarray = split('\|', $marcfieldslist);
 505
 506    # Separating the marcfields from the user-supplied headers
 507     my @csv_structures;
 508     foreach (@marcfieldsarray) {
 509         my @result = split('=', $_, 2);
 510         my $content = ( @result == 2 )
 511             ? $result[1]
 512             : $result[0];
 513         my @fields;
 514         while ( $content =~ m|(\d{3})\$?(.)?|g ) {
 515             my $fieldtag = $1;
 516             my $subfieldtag = $2;
 517             push @fields, { fieldtag => $fieldtag, subfieldtag => $subfieldtag };
 518         }
 519         if ( @result == 2) {
 520            push @csv_structures, { header => $result[0], content => $content, fields => \@fields };
 521         } else {
 522            push @csv_structures, { content => $content, fields => \@fields }
 523         }
 524     }
 525
 526     my ( @marcfieldsheaders, @csv_rows );
 527     my $dbh = C4::Context->dbh;
 528
 529     my $field_list;
 530     for my $field ( $record->fields ) {
 531         my $fieldtag = $field->tag;
 532         my $values;
 533         if ( $field->is_control_field ) {
 534             $values = $field->data();
 535         } else {
 536             $values->{indicator}{1} = $field->indicator(1);
 537             $values->{indicator}{2} = $field->indicator(2);
 538             for my $subfield ( $field->subfields ) {
 539                 my $subfieldtag = $subfield->[0];
 540                 my $value = $subfield->[1];
 541                 push @{ $values->{$subfieldtag} }, $value;
 542             }
 543         }
 544         # We force the key as an integer (trick for 00X and OXX fields)
 545         push @{ $field_list->{fields}{0+$fieldtag} }, $values;
 546     }
 547
 548     # For each field or subfield
 549     foreach my $csv_structure (@csv_structures) {
 550         my @field_values;
 551         my $tags = $csv_structure->{fields};
 552         my $content = $csv_structure->{content};
 553
 554         if ( $header ) {
 555             # If we have a user-supplied header, we use it
 556             if ( exists $csv_structure->{header} ) {
 557                 push @marcfieldsheaders, $csv_structure->{header};
 558             } else {
 559                 # If not, we get the matching tag name from koha
 560                 my $tag = $tags->[0];
 561                 if (defined $tag->{subfieldtag} ) {
 562                     my $query = "SELECT liblibrarian FROM marc_subfield_structure WHERE tagfield=? AND tagsubfield=?";
 563                     my @results = $dbh->selectrow_array( $query, {}, $tag->{fieldtag}, $tag->{subfieldtag} );
 564                     push @marcfieldsheaders, $results[0];
 565                 } else {
 566                     my $query = "SELECT liblibrarian FROM marc_tag_structure WHERE tagfield=?";
 567                     my @results = $dbh->selectrow_array( $query, {}, $tag->{fieldtag} );
 568                     push @marcfieldsheaders, $results[0];
 569                 }
 570             }
 571         }
 572
 573         # TT tags exist
 574         if ( $content =~ m|\[\%.*\%\]| ) {
 575             my $tt = Template->new();
 576             my $template = $content;
 577             # Replace 00X and 0XX with X or XX
 578             $content =~ s|fields.00(\d)|fields.$1|g;
 579             $content =~ s|fields.0(\d{2})|fields.$1|g;
 580             my $tt_output;
 581             $tt->process( \$content, $field_list, \$tt_output );
 582             push @csv_rows, $tt_output;
 583         } else {
 584             for my $tag ( @$tags ) {
 585                 my @fields = $record->field( $tag->{fieldtag} );
 586                 # If it is a subfield
 587                 my @loop_values;
 588                 if (defined $tag->{subfieldtag} ) {
 589                     my $av = Koha::AuthorisedValues->search_by_marc_field({ frameworkcode => $frameworkcode, tagfield => $tag->{fieldtag}, tagsubfield => $tag->{subfieldtag}, });
 590                     $av = $av->count ? $av->unblessed : [];
 591                     my $av_description_mapping = { map { ( $_->{authorised_value} => $_->{lib} ) } @$av };
 592                     # For each field
 593                     foreach my $field (@fields) {
 594                         my @subfields = $field->subfield( $tag->{subfieldtag} );
 595                         foreach my $subfield (@subfields) {
 596                             push @loop_values, (defined $av_description_mapping->{$subfield}) ? $av_description_mapping->{$subfield} : $subfield;
 597                         }
 598                     }
 599
 600                 # Or a field
 601                 } else {
 602                     my $av = Koha::AuthorisedValues->search_by_marc_field({ frameworkcode => $frameworkcode, tagfield => $tag->{fieldtag}, });
 603                     $av = $av->count ? $av->unblessed : [];
 604                     my $authvalues = { map { ( $_->{authorised_value} => $_->{lib} ) } @$av };
 605
 606                     foreach my $field ( @fields ) {
 607                         my $value;
 608
 609                         # If it is a control field
 610                         if ($field->is_control_field) {
 611                             $value = defined $authvalues->{$field->as_string} ? $authvalues->{$field->as_string} : $field->as_string;
 612                         } else {
 613                             # If it is a field, we gather all subfields, joined by the subfield separator
 614                             my @subvaluesarray;
 615                             my @subfields = $field->subfields;
 616                             foreach my $subfield (@subfields) {
 617                                 push (@subvaluesarray, defined $authvalues->{$subfield->[1]} ? $authvalues->{$subfield->[1]} : $subfield->[1]);
 618                             }
 619                             $value = join ($subfieldseparator, @subvaluesarray);
 620                         }
 621
 622                         # Field processing
 623                         my $marcfield = $tag->{fieldtag}; # This line fixes a retrocompatibility concern
 624                                                           # The "processing" could be based on the $marcfield variable.
 625                         eval $fieldprocessing if ($fieldprocessing); ## no critic (StringyEval)
 626
 627                         push @loop_values, $value;
 628                     }
 629
 630                 }
 631                 push @field_values, {
 632                     fieldtag => $tag->{fieldtag},
 633                     subfieldtag => $tag->{subfieldtag},
 634                     values => \@loop_values,
 635                 };
 636             }
 637             for my $field_value ( @field_values ) {
 638                 if ( $field_value->{subfieldtag} ) {
 639                     push @csv_rows, join( $subfieldseparator, @{ $field_value->{values} } );
 640                 } else {
 641                     push @csv_rows, join( $fieldseparator, @{ $field_value->{values} } );
 642                 }
 643             }
 644         }
 645     }
 646
 647
 648     if ( $header ) {
 649         $csv->combine(@marcfieldsheaders);
 650         $output = $csv->string() . "\n";
 651     }
 652     $csv->combine(@csv_rows);
 653     $output .= $csv->string() . "\n";
 654
 655     return $output;
 656
 657 }
 658
 659
 660 =head2 changeEncoding - Change the encoding of a record
 661
 662   my ($error, $newrecord) = changeEncoding($record,$format,$flavour,$to_encoding,$from_encoding);
 663
 664 Changes the encoding of a record
 665
 666 C<$record> - the record itself can be in ISO-2709, a MARC::Record object, or MARCXML for now (required)
 667
 668 C<$format> - MARC or MARCXML (required)
 669
 670 C<$flavour> - MARC21 or UNIMARC, if MARC21, it will change the leader (optional) [defaults to Koha system preference]
 671
 672 C<$to_encoding> - the encoding you want the record to end up in (optional) [UTF-8]
 673
 674 C<$from_encoding> - the encoding the record is currently in (optional, it will probably be able to tell unless there's a problem with the record)
 675
 676 FIXME: the from_encoding doesn't work yet
 677
 678 FIXME: better handling for UNIMARC, it should allow management of 100 field
 679
 680 FIXME: shouldn't have to convert to and from xml/marc just to change encoding someone needs to re-write MARC::Record's 'encoding' method to actually alter the encoding rather than just changing the leader
 681
 682 =cut
 683
 684 sub changeEncoding {
 685         my ($record,$format,$flavour,$to_encoding,$from_encoding) = @_;
 686         my $newrecord;
 687         my $error;
 688         unless($flavour) {$flavour = C4::Context->preference("marcflavour")};
 689         unless($to_encoding) {$to_encoding = "UTF-8"};
 690
 691         # ISO-2709 Record (MARC21 or UNIMARC)
 692         if (lc($format) =~ /^marc$/o) {
 693                 # if we're converting encoding of an ISO2709 file, we need to roundtrip through XML
 694                 #       because MARC::Record doesn't directly provide us with an encoding method
 695                 #       It's definitely less than idea and should be fixed eventually - kados
 696                 my $marcxml; # temporary storage of MARCXML scalar
 697                 ($error,$marcxml) = marc2marcxml($record,$to_encoding,$flavour);
 698                 unless ($error) {
 699                         ($error,$newrecord) = marcxml2marc($marcxml,$to_encoding,$flavour);
 700                 }
 701
 702         # MARCXML Record
 703         } elsif (lc($format) =~ /^marcxml$/o) { # MARCXML Record
 704                 my $marc;
 705                 ($error,$marc) = marcxml2marc($record,$to_encoding,$flavour);
 706                 unless ($error) {
 707                         ($error,$newrecord) = marc2marcxml($record,$to_encoding,$flavour);
 708                 }
 709         } else {
 710                 $error.="Unsupported record format:".$format;
 711         }
 712         return ($error,$newrecord);
 713 }
 714
 715 =head2 marc2bibtex - Convert from MARC21 and UNIMARC to BibTex
 716
 717   my ($bibtex) = marc2bibtex($record, $id);
 718
 719 Returns a BibTex scalar
 720
 721 C<$record> - a MARC::Record object
 722
 723 C<$id> - an id for the BibTex record (might be the biblionumber)
 724
 725 =cut
 726
 727
 728 sub marc2bibtex {
 729     my ($record, $id) = @_;
 730     my $tex;
 731     my $marcflavour = C4::Context->preference("marcflavour");
 732
 733     # Authors
 734     my $author;
 735     my @texauthors;
 736     my @authorFields = ('100','110','111','700','710','711');
 737     @authorFields = ('700','701','702','710','711','721') if ( $marcflavour eq "UNIMARC" );
 738
 739     foreach my $field ( @authorFields ) {
 740         # author formatted surname, firstname
 741         my $texauthor = '';
 742         if ( $marcflavour eq "UNIMARC" ) {
 743            $texauthor = join ', ',
 744            ( $record->subfield($field,"a"), $record->subfield($field,"b") );
 745        } else {
 746            $texauthor = $record->subfield($field,"a");
 747        }
 748        push @texauthors, $texauthor if $texauthor;
 749     }
 750     $author = join ' and ', @texauthors;
 751
 752     # Defining the conversion array according to the marcflavour
 753     my @bh;
 754     if ( $marcflavour eq "UNIMARC" ) {
 755
 756         # FIXME, TODO : handle repeatable fields
 757         # TODO : handle more types of documents
 758
 759         # Unimarc to bibtex array
 760         @bh = (
 761
 762             # Mandatory
 763             author    => $author,
 764             title     => $record->subfield("200", "a") || "",
 765             editor    => $record->subfield("210", "g") || "",
 766             publisher => $record->subfield("210", "c") || "",
 767             year      => $record->subfield("210", "d") || $record->subfield("210", "h") || "",
 768
 769             # Optional
 770             volume  =>  $record->subfield("200", "v") || "",
 771             series  =>  $record->subfield("225", "a") || "",
 772             address =>  $record->subfield("210", "a") || "",
 773             edition =>  $record->subfield("205", "a") || "",
 774             note    =>  $record->subfield("300", "a") || "",
 775             url     =>  $record->subfield("856", "u") || ""
 776         );
 777     } else {
 778
 779         # Marc21 to bibtex array
 780         @bh = (
 781
 782             # Mandatory
 783             author    => $author,
 784             title     => $record->subfield("245", "a") || "",
 785             editor    => $record->subfield("260", "f") || "",
 786             publisher => $record->subfield("264", "b") || $record->subfield("260", "b") || "",
 787             year      => $record->subfield("264", "c") || $record->subfield("260", "c") || $record->subfield("260", "g") || "",
 788
 789             # Optional
 790             # unimarc to marc21 specification says not to convert 200$v to marc21
 791             series  =>  $record->subfield("490", "a") || "",
 792             address =>  $record->subfield("264", "a") || $record->subfield("260", "a") || "",
 793             edition =>  $record->subfield("250", "a") || "",
 794             note    =>  $record->subfield("500", "a") || "",
 795             url     =>  $record->subfield("856", "u") || ""
 796         );
 797     }
 798
 799     my $BibtexExportAdditionalFields = C4::Context->preference('BibtexExportAdditionalFields');
 800     my $additional_fields;
 801     if ($BibtexExportAdditionalFields) {
 802         $BibtexExportAdditionalFields = "$BibtexExportAdditionalFields\n\n";
 803         $additional_fields = eval { YAML::Load($BibtexExportAdditionalFields); };
 804         if ($@) {
 805             warn "Unable to parse BibtexExportAdditionalFields : $@";
 806             $additional_fields = undef;
 807         }
 808     }
 809
 810     if ( $additional_fields && $additional_fields->{'@'} ) {
 811         my ( $f, $sf ) = split( /\$/, $additional_fields->{'@'} );
 812         my ( $type ) = read_field( { record => $record, field => $f, subfield => $sf, field_numbers => [1] } );
 813
 814         if ($type) {
 815             $tex .= '@' . $type . '{';
 816         }
 817         else {
 818             $tex .= "\@book{";
 819         }
 820     }
 821     else {
 822         $tex .= "\@book{";
 823     }
 824
 825     my @elt;
 826     for ( my $i = 0 ; $i < scalar( @bh ) ; $i = $i + 2 ) {
 827         next unless $bh[$i+1];
 828         push @elt, qq|\t$bh[$i] = {$bh[$i+1]}|;
 829     }
 830     $tex .= join(",\n", $id, @elt);
 831
 832     if ($additional_fields) {
 833         $tex .= ",\n";
 834         foreach my $bibtex_tag ( keys %$additional_fields ) {
 835             next if $bibtex_tag eq '@';
 836
 837             my @fields =
 838               ref( $additional_fields->{$bibtex_tag} ) eq 'ARRAY'
 839               ? @{ $additional_fields->{$bibtex_tag} }
 840               : $additional_fields->{$bibtex_tag};
 841
 842             for my $tag (@fields) {
 843                 my ( $f, $sf ) = split( /\$/, $tag );
 844                 my @values = read_field( { record => $record, field => $f, subfield => $sf } );
 845                 foreach my $v (@values) {
 846                     $tex .= qq(\t$bibtex_tag = {$v}\n);
 847                 }
 848             }
 849         }
 850     }
 851     else {
 852         $tex .= "\n";
 853     }
 854
 855     $tex .= "}\n";
 856
 857     return $tex;
 858 }
 859
 860
 861 =head1 INTERNAL FUNCTIONS
 862
 863 =head2 _entity_encode - Entity-encode an array of strings
 864
 865   my ($entity_encoded_string) = _entity_encode($string);
 866
 867 or
 868
 869   my (@entity_encoded_strings) = _entity_encode(@strings);
 870
 871 Entity-encode an array of strings
 872
 873 =cut
 874
 875 sub _entity_encode {
 876         my @strings = @_;
 877         my @strings_entity_encoded;
 878         foreach my $string (@strings) {
 879                 my $nfc_string = NFC($string);
 880                 $nfc_string =~ s/([\x{0080}-\x{fffd}])/sprintf('&#x%X;',ord($1))/sgoe;
 881                 push @strings_entity_encoded, $nfc_string;
 882         }
 883         return @strings_entity_encoded;
 884 }
 885
 886 END { }       # module clean-up code here (global destructor)
 887 1;
 888 __END__
 889
 890 =head1 AUTHOR
 891
 892 Joshua Ferraro <jmf@liblime.com>
 893
 894 =head1 MODIFICATIONS
 895
 896
 897 =cut