package C4::Record;

use Modern::Perl;

use MARC::Record; # marc2marcxml, marcxml2marc, changeEncoding

use MARC::File::XML; # marc2marcxml, marcxml2marc, changeEncoding

use Biblio::EndnoteStyle;

use Unicode::Normalize qw( NFC ); # _entity_encode

use C4::Biblio qw( GetFrameworkCode );

use C4::Koha; #marc2csv

use C4::XSLT;

use YAML::XS; #marcrecords2csv

use Encode;

use Template;

use Text::CSV::Encoded; #marc2csv

use Koha::Items;

use Koha::SimpleMARC qw( read_field );

use Koha::XSLT::Base;

use Koha::CsvProfiles;

use Koha::AuthorisedValues;

use Koha::TemplateUtils qw( process_tt );

use Carp qw( carp croak );

use vars qw(@ISA @EXPORT);

@ISA = qw(Exporter);

@EXPORT = qw(

);

sub marc2marc {

my ($marc,$to_flavour,$from_flavour,$encoding) = @_;

my $error;

if ($to_flavour && $to_flavour =~ m/marcstd/) {

my $marc_record_obj;

if ($marc =~ /^MARC::Record/) { # it's already a MARC::Record object

$marc_record_obj = $marc;

} else { # it's not a MARC::Record object, make it one

eval { $marc_record_obj = MARC::Record->new_from_usmarc($marc) }; # handle exceptions

if ($@) { $error .="\nCreation of MARC::Record object failed: ".$MARC::File::ERROR };

}

unless ($error) {

my @privatefields;

foreach my $field ($marc_record_obj->fields()) {

if ($field->tag() =~ m/9/ && ($field->tag() != '490' || C4::Context->preference("marcflavour") eq 'UNIMARC')) {

push @privatefields, $field;

} elsif (! ($field->is_control_field())) {

$field->delete_subfield(code => '9') if ($field->subfield('9'));

}

}

$marc_record_obj->delete_field($_) for @privatefields;

$marc = $marc_record_obj->as_usmarc();

}

} else {

$error = "Feature not yet implemented\n";

}

return ($error,$marc);

}

sub marc2marcxml {

my ($marc,$encoding,$flavour,$dont_entity_encode) = @_;

my $error; # the error string

my $marcxml; # the final MARCXML scalar

# test if it's already a MARC::Record object, if not, make it one

my $marc_record_obj;

if ($marc =~ /^MARC::Record/) { # it's already a MARC::Record object

$marc_record_obj = $marc;

} else { # it's not a MARC::Record object, make it one

eval { $marc_record_obj = MARC::Record->new_from_usmarc($marc) }; # handle exceptions

# conversion to MARC::Record object failed, populate $error

if ($@) { $error .="\nCreation of MARC::Record object failed: ".$MARC::File::ERROR };

}

# only proceed if no errors so far

unless ($error) {

# check the record for warnings

my @warnings = $marc_record_obj->warnings();

if (@warnings) {

warn "\nWarnings encountered while processing ISO-2709 record with title \"".$marc_record_obj->title()."\":\n";

foreach my $warn (@warnings) { warn "\t".$warn };

}

unless($encoding) {$encoding = "UTF-8"}; # set default encoding

unless($flavour) {$flavour = C4::Context->preference("marcflavour")}; # set default MARC flavour

# attempt to convert the record to MARCXML

eval { $marcxml = $marc_record_obj->as_xml_record($flavour) }; #handle exceptions

# record creation failed, populate $error

if ($@) {

$error .= "Creation of MARCXML failed:".$MARC::File::ERROR;

$error .= "Additional information:\n";

my @warnings = $@->warnings();

foreach my $warn (@warnings) { $error.=$warn."\n" };

# record creation was successful

} else {

# check the record for warning flags again (warnings() will be cleared already if there was an error, see above block

@warnings = $marc_record_obj->warnings();

if (@warnings) {

warn "\nWarnings encountered while processing ISO-2709 record with title \"".$marc_record_obj->title()."\":\n";

foreach my $warn (@warnings) { warn "\t".$warn };

}

}

# only proceed if no errors so far

unless ($error) {

# entity encode the XML unless instructed not to

unless ($dont_entity_encode) {

my ($marcxml_entity_encoded) = _entity_encode($marcxml);

$marcxml = $marcxml_entity_encoded;

}

}

}

# return result to calling program

return ($error,$marcxml);

}

sub marcxml2marc {

my ($marcxml,$encoding,$flavour) = @_;

my $error; # the error string

my $marc; # the final ISO-2709 scalar

unless($encoding) {$encoding = "UTF-8"}; # set the default encoding

unless($flavour) {$flavour = C4::Context->preference("marcflavour")}; # set the default MARC flavour

# attempt to do the conversion

eval { $marc = MARC::Record->new_from_xml($marcxml,$encoding,$flavour) }; # handle exceptions

# record creation failed, populate $error

if ($@) {$error .="\nCreation of MARCXML Record failed: ".$@;

$error.=$MARC::File::ERROR if ($MARC::File::ERROR);

};

# return result to calling program

return ($error,$marc);

}

sub marc2dcxml {

my ( $marc, $xml, $biblionumber, $format ) = @_;

# global variables

my ( $marcxml, $record, $output );

# set the default path for intranet xslts

# differents xslts to process (OAIDC, SRWDC and RDFDC)

my $xsl = C4::Context->config('intrahtdocs') . '/prog/en/xslt/' .

C4::Context->preference('marcflavour') . 'slim2' . uc ( $format ) . '.xsl';

if ( defined $marc ) {

# no need to catch errors or warnings marc2marcxml do it instead

$marcxml = C4::Record::marc2marcxml( $marc );

} elsif ( not defined $xml and defined $biblionumber ) {

# get MARCXML biblio directly without item information

$marcxml = C4::Biblio::GetXmlBiblio( $biblionumber );

} else {

$marcxml = $xml;

}

eval { $record = MARC::Record->new_from_xml(

$marcxml,

'UTF-8',

C4::Context->preference('marcflavour')

);

};

# conversion to MARC::Record object failed

if ( $@ ) {

croak "Creation of MARC::Record object failed.";

} elsif ( $record->warnings() ) {

carp "Warnings encountered while processing ISO-2709 record.\n";

my @warnings = $record->warnings();

foreach my $warn (@warnings) {

carp "\t". $warn;

};

} elsif ( $record =~ /^MARC::Record/ ) { # if OK makes xslt transformation

my $xslt_engine = Koha::XSLT::Base->new;

if ( $format =~ /^(dc|oaidc|srwdc|rdfdc)$/i ) {

$output = $xslt_engine->transform( $marcxml, $xsl );

} else {

croak "The format argument ($format) not accepted.\n" .

"Please pass a valid format (oaidc, srwdc, or rdfdc)\n";

}

my $err = $xslt_engine->err; # error code

if ( $err ) {

croak "Error $err while processing\n";

} else {

return $output;

}

}

}

sub marc2modsxml {

my ($marc) = @_;

return _transformWithStylesheet($marc, "/prog/en/xslt/MARC21slim2MODS3-1.xsl");

}

sub marc2madsxml {

my ($marc) = @_;

return _transformWithStylesheet($marc, "/prog/en/xslt/MARC21slim2MADS.xsl");

}

sub _transformWithStylesheet {

my ($marc, $stylesheet) = @_;

# grab the XML, run it through our stylesheet, push it out to the browser

my $xmlrecord = marc2marcxml($marc);

my $xslfile = C4::Context->config('intrahtdocs') . $stylesheet;

return C4::XSLT::engine->transform($xmlrecord, $xslfile);

}

sub marc2endnote {

my ($marc) = @_;

my $marc_rec_obj = MARC::Record->new_from_usmarc($marc);

my ( $abstract, $f260a, $f710a );

my $f260 = $marc_rec_obj->field('260');

if ($f260) {

$f260a = $f260->subfield('a') if $f260;

}

my $f710 = $marc_rec_obj->field('710');

if ($f710) {

$f710a = $f710->subfield('a');

}

my $f500 = $marc_rec_obj->field('500');

if ($f500) {

$abstract = $f500->subfield('a');

}

my $fields = {

DB => C4::Context->preference("LibraryName"),

Title => $marc_rec_obj->title(),

Author => $marc_rec_obj->author(),

Publisher => $f710a,

City => $f260a,

Year => $marc_rec_obj->publication_date,

Abstract => $abstract,

};

my $style = Biblio::EndnoteStyle->new();

my $template;

$template.= "DB - DB\n" if C4::Context->preference("LibraryName");

$template.="T1 - Title\n" if $marc_rec_obj->title();

$template.="A1 - Author\n" if $marc_rec_obj->author();

$template.="PB - Publisher\n" if $f710a;

$template.="CY - City\n" if $f260a;

$template.="Y1 - Year\n" if $marc_rec_obj->publication_date;

$template.="AB - Abstract\n" if $abstract;

my ($text, $errmsg) = $style->format($template, $fields);

return ($text);

}

sub marc2csv {

my ($biblios, $id, $itemnumbers) = @_;

$itemnumbers ||= [];

my $output;

my $csv = Text::CSV::Encoded->new( { formula => "empty" } );

# Getting yaml file

my $configfile = "../tools/csv-profiles/$id.yaml";

my ($preprocess, $postprocess, $fieldprocessing);

if (-e $configfile){

($preprocess,$postprocess, $fieldprocessing) = YAML::XS::LoadFile($configfile);

}

# Preprocessing

eval $preprocess if ($preprocess); ## no critic (StringyEval)

my $firstpass = 1;

if ( @$itemnumbers ) {

for my $itemnumber ( @$itemnumbers) {

my $item = Koha::Items->find( $itemnumber );

my $biblionumber = $item->biblio->biblionumber;

$output .= marcrecord2csv( $biblionumber, $id, $firstpass, $csv, $fieldprocessing, [$itemnumber] ) // '';

$firstpass = 0;

}

} else {

foreach my $biblio (@$biblios) {

$output .= marcrecord2csv( $biblio, $id, $firstpass, $csv, $fieldprocessing ) // '';

$firstpass = 0;

}

}

# Postprocessing

eval $postprocess if ($postprocess); ## no critic (StringyEval)

return $output;

}

sub marcrecord2csv {

my ($biblionumber, $id, $header, $csv, $fieldprocessing, $itemnumbers) = @_;

my $output;

# Getting the record

my $biblio = Koha::Biblios->find($biblionumber);

return unless $biblio;

my $record = eval { $biblio->metadata->record( { embed_items => 1, itemnumbers => $itemnumbers } ); };

return unless $record;

# Getting the framework

my $frameworkcode = $biblio->frameworkcode;

# Getting information about the csv profile

my $profile = Koha::CsvProfiles->find($id);

# Getting output encoding

my $encoding = $profile->encoding || 'utf8';

# Getting separators

my $csvseparator = $profile->csv_separator || ',';

my $fieldseparator = $profile->field_separator || '#';

my $subfieldseparator = $profile->subfield_separator || '|';

# TODO: Be more generic (in case we have to handle other protected chars or more separators)

if ($csvseparator eq '\t') { $csvseparator = "\t" }

if ($fieldseparator eq '\t') { $fieldseparator = "\t" }

if ($subfieldseparator eq '\t') { $subfieldseparator = "\t" }

if ($csvseparator eq '\n') { $csvseparator = "\n" }

if ($fieldseparator eq '\n') { $fieldseparator = "\n" }

if ($subfieldseparator eq '\n') { $subfieldseparator = "\n" }

$csv = $csv->encoding_out($encoding) ;

$csv->sep_char($csvseparator);

# Getting the marcfields

my $marcfieldslist = $profile->content;

# Getting the marcfields as an array

my @marcfieldsarray = split('\|', $marcfieldslist);

# Separating the marcfields from the user-supplied headers

my @csv_structures;

foreach (@marcfieldsarray) {

my @result = split('=', $_, 2);

my $content = ( @result == 2 )

? $result[1]

: $result[0];

my @fields;

while ( $content =~ m|(\d{3})\$?(.)?|g ) {

my $fieldtag = $1;

my $subfieldtag = $2;

push @fields, { fieldtag => $fieldtag, subfieldtag => $subfieldtag };

}

if ( @result == 2) {

push @csv_structures, { header => $result[0], content => $content, fields => \@fields };

} else {

push @csv_structures, { content => $content, fields => \@fields }

}

}

my ( @marcfieldsheaders, @csv_rows );

my $dbh = C4::Context->dbh;

my $field_list;

for my $field ( $record->fields ) {

my $fieldtag = $field->tag;

my $values;

if ( $field->is_control_field ) {

$values = $field->data();

} else {

$values->{indicator}{1} = $field->indicator(1);

$values->{indicator}{2} = $field->indicator(2);

for my $subfield ( $field->subfields ) {

my $subfieldtag = $subfield->[0];

my $value = $subfield->[1];

push @{ $values->{$subfieldtag} }, $value;

}

}

# We force the key as an integer (trick for 00X and OXX fields)

push @{ $field_list->{fields}{0+$fieldtag} }, $values;

}

# For each field or subfield

foreach my $csv_structure (@csv_structures) {

my @field_values;

my $tags = $csv_structure->{fields};

my $content = $csv_structure->{content};

if ( $header ) {

# If we have a user-supplied header, we use it

if ( exists $csv_structure->{header} ) {

push @marcfieldsheaders, $csv_structure->{header};

} else {

# If not, we get the matching tag name from koha

my $tag = $tags->[0];

if (defined $tag->{subfieldtag} ) {

my $query = "SELECT liblibrarian FROM marc_subfield_structure WHERE tagfield=? AND tagsubfield=?";

my @results = $dbh->selectrow_array( $query, {}, $tag->{fieldtag}, $tag->{subfieldtag} );

push @marcfieldsheaders, $results[0];

} else {

my $query = "SELECT liblibrarian FROM marc_tag_structure WHERE tagfield=?";

my @results = $dbh->selectrow_array( $query, {}, $tag->{fieldtag} );

push @marcfieldsheaders, $results[0];

}

}

}

# TT tags exist

if ( $content =~ m|\[\%.*\%\]| ) {

# Replace 00X and 0XX with X or XX

$content =~ s|fields.00(\d)|fields.$1|g;

$content =~ s|fields.0(\d{2})|fields.$1|g;

my $tt_output = process_tt( $content, $field_list );

push @csv_rows, $tt_output;

} else {

for my $tag ( @$tags ) {

my @fields = $record->field( $tag->{fieldtag} );

# If it is a subfield

my @loop_values;

if (defined $tag->{subfieldtag} ) {

my $av_description_mapping = Koha::AuthorisedValues->get_descriptions_by_marc_field(

{

frameworkcode => $frameworkcode, tagfield => $tag->{fieldtag},

tagsubfield => $tag->{subfieldtag},

}

);

# For each field

foreach my $field (@fields) {

my @subfields = $field->subfield( $tag->{subfieldtag} );

foreach my $subfield (@subfields) {

push @loop_values, (defined $av_description_mapping->{$subfield}) ? $av_description_mapping->{$subfield} : $subfield;

}

}

# Or a field

} else {

foreach my $field ( @fields ) {

my $value;

# If it is a control field

if ($field->is_control_field) {

my $authvalues = Koha::AuthorisedValues->get_descriptions_by_marc_field(

{ frameworkcode => $frameworkcode, tagfield => $tag->{fieldtag}, } );

$value = defined $authvalues->{$field->as_string} ? $authvalues->{$field->as_string} : $field->as_string;

} else {

# If it is a field, we gather all subfields, joined by the subfield separator

my @subvaluesarray;

my @subfields = $field->subfields;

foreach my $subfield (@subfields) {

my $authvalues = Koha::AuthorisedValues->get_descriptions_by_marc_field(

{

frameworkcode => $frameworkcode, tagfield => $tag->{fieldtag},

tagsubfield => $subfield->[0],

}

);

push (@subvaluesarray, defined $authvalues->{$subfield->[1]} ? $authvalues->{$subfield->[1]} : $subfield->[1]);

}

$value = join ($subfieldseparator, @subvaluesarray);

}

# Field processing

my $marcfield = $tag->{fieldtag}; # This line fixes a retrocompatibility concern

# The "processing" could be based on the $marcfield variable.

eval $fieldprocessing if ($fieldprocessing); ## no critic (StringyEval)

push @loop_values, $value;

}

}

push @field_values, {

fieldtag => $tag->{fieldtag},

subfieldtag => $tag->{subfieldtag},

values => \@loop_values,

};

}

for my $field_value ( @field_values ) {

if ( $field_value->{subfieldtag} ) {

push @csv_rows, join( $subfieldseparator, @{ $field_value->{values} } );

} else {

push @csv_rows, join( $fieldseparator, @{ $field_value->{values} } );

}

}

}

}

if ( $header ) {

$csv->combine(@marcfieldsheaders);

$output = $csv->string() . "\n";

}

$csv->combine(@csv_rows);

$output .= $csv->string() . "\n";

return $output;

}

sub changeEncoding {

my ($record,$format,$flavour,$to_encoding,$from_encoding) = @_;

my $newrecord;

my $error;

unless($flavour) {$flavour = C4::Context->preference("marcflavour")};

unless($to_encoding) {$to_encoding = "UTF-8"};

# ISO-2709 Record (MARC21 or UNIMARC)

if (lc($format) =~ /^marc$/o) {

# if we're converting encoding of an ISO2709 file, we need to roundtrip through XML

# because MARC::Record doesn't directly provide us with an encoding method

# It's definitely less than idea and should be fixed eventually - kados

my $marcxml; # temporary storage of MARCXML scalar

($error,$marcxml) = marc2marcxml($record,$to_encoding,$flavour);

unless ($error) {

($error,$newrecord) = marcxml2marc($marcxml,$to_encoding,$flavour);

}

# MARCXML Record

} elsif (lc($format) =~ /^marcxml$/o) { # MARCXML Record

my $marc;

($error,$marc) = marcxml2marc($record,$to_encoding,$flavour);

unless ($error) {

($error,$newrecord) = marc2marcxml($record,$to_encoding,$flavour);

}

} else {

$error.="Unsupported record format:".$format;

}

return ($error,$newrecord);

}

sub marc2bibtex {

my ($record, $id) = @_;

my $tex;

my $marcflavour = C4::Context->preference("marcflavour");

# Authors

my $author;

my @texauthors;

my @authorFields = ('100','110','111','700','710','711');

@authorFields = ('700','701','702','710','711','721') if ( $marcflavour eq "UNIMARC" );

foreach my $field ( @authorFields ) {

# author formatted surname, firstname

my $texauthor = '';

if ( $marcflavour eq "UNIMARC" ) {

$texauthor = join ', ',

( $record->subfield($field,"a"), $record->subfield($field,"b") );

} else {

$texauthor = $record->subfield($field,"a");

}

push @texauthors, $texauthor if $texauthor;

}

$author = join ' and ', @texauthors;

# Defining the conversion array according to the marcflavour

my @bh;

if ( $marcflavour eq "UNIMARC" ) {

# FIXME, TODO : handle repeatable fields

# TODO : handle more types of documents

# Unimarc to bibtex array

@bh = (

# Mandatory

author => $author,

title => $record->subfield("200", "a") || "",

editor => $record->subfield("210", "g") || "",

publisher => $record->subfield("210", "c") || "",

year => $record->subfield("210", "d") || $record->subfield("210", "h") || "",

# Optional

volume => $record->subfield("200", "v") || "",

series => $record->subfield("225", "a") || "",

address => $record->subfield("210", "a") || "",

edition => $record->subfield("205", "a") || "",

note => $record->subfield("300", "a") || "",

url => $record->subfield("856", "u") || ""

);

} else {

# Marc21 to bibtex array

@bh = (

# Mandatory

author => $author,

title => $record->subfield("245", "a") || "",

editor => $record->subfield("260", "f") || "",

publisher => $record->subfield("264", "b") || $record->subfield("260", "b") || "",

year => $record->subfield("264", "c") || $record->subfield("260", "c") || $record->subfield("260", "g") || "",

# Optional

# unimarc to marc21 specification says not to convert 200$v to marc21

series => $record->subfield("490", "a") || "",

address => $record->subfield("264", "a") || $record->subfield("260", "a") || "",

edition => $record->subfield("250", "a") || "",

note => $record->subfield("500", "a") || "",

url => $record->subfield("856", "u") || ""

);

}

my $additional_fields = C4::Context->yaml_preference('BibtexExportAdditionalFields');

if ( $additional_fields && $additional_fields->{'@'} ) {

my ( $f, $sf ) = split( /\$/, $additional_fields->{'@'} );

my ( $type ) = read_field( { record => $record, field => $f, subfield => $sf, field_numbers => [1] } );

if ($type) {

$tex .= '@' . $type . '{';

}

else {

$tex .= "\@book{";

}

}

else {

$tex .= "\@book{";

}

my @elt;

for ( my $i = 0 ; $i < scalar( @bh ) ; $i = $i + 2 ) {

next unless $bh[$i+1];

push @elt, qq|\t$bh[$i] = {$bh[$i+1]}|;

}

$tex .= join(",\n", $id, @elt);

if ($additional_fields) {

$tex .= ",\n";

foreach my $bibtex_tag ( keys %$additional_fields ) {

next if $bibtex_tag eq '@';

my @fields =

ref( $additional_fields->{$bibtex_tag} ) eq 'ARRAY'

? @{ $additional_fields->{$bibtex_tag} }

: $additional_fields->{$bibtex_tag};

for my $tag (@fields) {

my ( $f, $sf ) = split( /\$/, $tag );

my @values = read_field( { record => $record, field => $f, subfield => $sf } );

foreach my $v (@values) {

$tex .= qq(\t$bibtex_tag = {$v}\n);

}

}

}

}

else {

$tex .= "\n";

}

$tex .= "}\n";

return $tex;

}

sub marc2cites {

my $record = shift;

my $marcflavour = C4::Context->preference("marcflavour");

my %cites = ();

my @authors = ();

my $re_clean = qr/(^[\.,:;\/\-\s]+|[\.,:;\/\-\s]+$)/;

my @authorFields = ( '100', '110', '111', '700', '710', '711' );

@authorFields = ( '700', '701', '702', '710', '711', '721' ) if ( $marcflavour eq "UNIMARC" );

foreach my $ftag (@authorFields) {

foreach my $field ( $record->field($ftag) ) {

my $author = '';

if ( $marcflavour eq "UNIMARC" ) {

$author = join ', ',

( $field->subfield("a"), $field->subfield("b") );

} else {

$author = $field->subfield("a");

}

if ( $author =~ /([^,]+),?(.*)/ ) {

my %a;

( $a{'surname'} = $1 ) =~ s/$re_clean//g;

$a{'forenames'} = [ map { my $t = $_; $t =~ s/$re_clean//g; $t } split ' ', $2 ];

push( @authors, \%a );

}

}

}

my %publication;

if ( $marcflavour eq "UNIMARC" ) {

%publication = (

title => $record->subfield( "200", "a" ) || "",

place => $record->subfield( "210", "a" ) || "",

publisher => $record->subfield( "210", "c" ) || "",

date => $record->subfield( "210", "d" ) || $record->subfield( "210", "h" ) || ""

);

} else {

%publication = (

title => $record->subfield( "245", "a" ) || "",

place => $record->subfield( "264", "a" ) || $record->subfield( "260", "a" ) || "",

publisher => $record->subfield( "264", "b" ) || $record->subfield( "260", "b" ) || "",

date => $record->subfield( "264", "c" )

|| $record->subfield( "260", "c" )

|| $record->subfield( "260", "g" )

|| ""

);

}

$publication{$_} =~ s/$re_clean//g for keys %publication;

$publication{'date'} =~ s/[\D-]//g;

my $i = $#authors;

my $last = 0;

my $seclast = 0;

for my $author (@authors) {

$cites{'Harvard'} .= $author->{'surname'} . ' ';

$cites{'Harvard'} .= substr( $_, 0, 1 ) . '. ' for @{ $author->{'forenames'} };

$cites{'Harvard'} =~ s/\s+$//;

$cites{'Harvard'} .= $last ? '' : ( $seclast ? ' and ' : ', ' );

$cites{'Chicago'} .= $author->{'surname'} . ' ';

$cites{'Chicago'} .= $_ . ' ' for @{ $author->{'forenames'} };

$cites{'Chicago'} =~ s/\s+$//;

$cites{'Chicago'} .= $last ? '' : ( $seclast ? ' and ' : ', ' );

$cites{'MLA'} .= $author->{'surname'} . ' ';

$cites{'MLA'} .= $_ . ' ' for @{ $author->{'forenames'} };

$cites{'MLA'} =~ s/\s+$//;

$cites{'MLA'} .= $last ? '' : ( $seclast ? ' and ' : ', ' );

$cites{'APA'} .= $author->{'surname'} . ' ';

$cites{'APA'} .= substr( $_, 0, 1 ) . '. ' for @{ $author->{'forenames'} };

$cites{'APA'} =~ s/\s+$//;

$cites{'APA'} .= $last ? '' : ( $seclast ? ' & ' : ', ' );

$seclast = $#authors > 1 && $i-- == 2;

$last = $i == 0;

}

$cites{$_} =~ s/([^\.])$/$1./ for keys %cites;

if ( $publication{date} ) {

$cites{'Harvard'} .= ' (' . $publication{'date'} . '). ';

$cites{'Chicago'} .= ' ' . $publication{'date'} . '. ';

$cites{'MLA'} .= ' ' . $publication{'title'} . '. ';

$cites{'APA'} .= ' (' . $publication{'date'} . '). ';

}

$cites{'Harvard'} .= $publication{'title'} . '. ';

$cites{'Chicago'} .= $publication{'title'} . '. ';

$cites{'MLA'} .= $publication{'place'} . ': ';

$cites{'APA'} .= $publication{'title'} . '. ';

$cites{'Harvard'} .= $publication{'place'} . ': ';

$cites{'Chicago'} .= $publication{'place'} . ': ';

$cites{'MLA'} .= $publication{'publisher'} . '. ';

$cites{'APA'} .= $publication{'place'} . ': ';

$cites{'Harvard'} .= $publication{'publisher'};

$cites{'Chicago'} .= $publication{'publisher'};

$cites{'MLA'} .= $publication{'date'};

$cites{'APA'} .= $publication{'publisher'};

$cites{$_} =~ s/ +/ / for keys %cites;

$cites{$_} =~ s/([^\.])$/$1./ for keys %cites;

return \%cites;

}

sub _entity_encode {

my @strings = @_;

my @strings_entity_encoded;

foreach my $string (@strings) {

my $nfc_string = NFC($string);

$nfc_string =~ s/([\x{0080}-\x{fffd}])/sprintf('&#x%X;',ord($1))/sgoe;

push @strings_entity_encoded, $nfc_string;

}

return @strings_entity_encoded;

}

END { } # module clean-up code here (global destructor)

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