Koha/C4/Koha.pm
Jonathan Druart 9d6d641d1f Bug 17600: Standardize our EXPORT_OK
On bug 17591 we discovered that there was something weird going on with
the way we export and use subroutines/modules.
This patch tries to standardize our EXPORT to use EXPORT_OK only.

That way we will need to explicitely define the subroutine we want to
use from a module.

This patch is a squashed version of:
Bug 17600: After export.pl
Bug 17600: After perlimport
Bug 17600: Manual changes
Bug 17600: Other manual changes after second perlimports run
Bug 17600: Fix tests

And a lot of other manual changes.

export.pl is a dirty script that can be found on bug 17600.

"perlimport" is:
git clone https://github.com/oalders/App-perlimports.git
cd App-perlimports/
cpanm --installdeps .
export PERL5LIB="$PERL5LIB:/kohadevbox/koha/App-perlimports/lib"
find . \( -name "*.pl" -o -name "*.pm" \) -exec perl App-perlimports/script/perlimports --inplace-edit --no-preserve-unused --filename {} \;

The ideas of this patch are to:
* use EXPORT_OK instead of EXPORT
* perltidy the EXPORT_OK list
* remove '&' before the subroutine names
* remove some uneeded use statements
* explicitely import the subroutines we need within the controllers or
modules

Note that the private subroutines (starting with _) should not be
exported (and not used from outside of the module except from tests).

EXPORT vs EXPORT_OK (from
https://www.thegeekstuff.com/2010/06/perl-exporter-examples/)
"""
Export allows to export the functions and variables of modules to user’s namespace using the standard import method. This way, we don’t need to create the objects for the modules to access it’s members.

@EXPORT and @EXPORT_OK are the two main variables used during export operation.

@EXPORT contains list of symbols (subroutines and variables) of the module to be exported into the caller namespace.

@EXPORT_OK does export of symbols on demand basis.
"""

If this patch caused a conflict with a patch you wrote prior to its
push:
* Make sure you are not reintroducing a "use" statement that has been
removed
* "$subroutine" is not exported by the C4::$MODULE module
means that you need to add the subroutine to the @EXPORT_OK list
* Bareword "$subroutine" not allowed while "strict subs"
means that you didn't imported the subroutine from the module:
  - use $MODULE qw( $subroutine list );
You can also use the fully qualified namespace: C4::$MODULE::$subroutine

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
2021-07-16 08:58:47 +02:00

905 lines
24 KiB
Perl

package C4::Koha;
# Copyright 2000-2002 Katipo Communications
# Parts Copyright 2010 Nelsonville Public Library
# Parts copyright 2010 BibLibre
#
# This file is part of Koha.
#
# Koha is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# Koha is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Koha; if not, see <http://www.gnu.org/licenses>.
use Modern::Perl;
use C4::Context;
use Koha::Caches;
use Koha::AuthorisedValues;
use Koha::Libraries;
use Koha::MarcSubfieldStructures;
use Business::ISBN;
use Business::ISSN;
use autouse 'Data::cselectall_arrayref' => qw(Dumper);
our (@ISA, @EXPORT_OK);
BEGIN {
require Exporter;
@ISA = qw(Exporter);
@EXPORT_OK = qw(
GetItemTypesCategorized
getallthemes
getFacets
getImageSets
getnbpages
getitemtypeimagedir
getitemtypeimagesrc
getitemtypeimagelocation
GetAuthorisedValues
GetNormalizedUPC
GetNormalizedISBN
GetNormalizedEAN
GetNormalizedOCLCNumber
xml_escape
GetVariationsOfISBN
GetVariationsOfISBNs
NormalizeISBN
GetVariationsOfISSN
GetVariationsOfISSNs
NormalizeISSN
);
}
=head1 NAME
C4::Koha - Perl Module containing convenience functions for Koha scripts
=head1 SYNOPSIS
use C4::Koha;
=head1 DESCRIPTION
Koha.pm provides many functions for Koha scripts.
=head1 FUNCTIONS
=cut
=head2 GetItemTypesCategorized
$categories = GetItemTypesCategorized();
Returns a hashref containing search categories.
A search category will be put in the hash if at least one of its itemtypes is visible in OPAC.
The categories must be part of Authorized Values (ITEMTYPECAT)
=cut
sub GetItemTypesCategorized {
my $dbh = C4::Context->dbh;
# Order is important, so that partially hidden (some items are not visible in OPAC) search
# categories will be visible. hideinopac=0 must be last.
my $query = q|
SELECT itemtype, description, imageurl, hideinopac, 0 as 'iscat' FROM itemtypes WHERE ISNULL(searchcategory) or length(searchcategory) = 0
UNION
SELECT DISTINCT searchcategory AS `itemtype`,
COALESCE(authorised_values.lib_opac,authorised_values.lib) AS description,
authorised_values.imageurl AS imageurl,
hideinopac, 1 as 'iscat'
FROM itemtypes
LEFT JOIN authorised_values ON searchcategory = authorised_value
WHERE searchcategory > '' and hideinopac=1
UNION
SELECT DISTINCT searchcategory AS `itemtype`,
COALESCE(authorised_values.lib_opac,authorised_values.lib) AS description,
authorised_values.imageurl AS imageurl,
hideinopac, 1 as 'iscat'
FROM itemtypes
LEFT JOIN authorised_values ON searchcategory = authorised_value
WHERE searchcategory > '' and hideinopac=0
|;
return ($dbh->selectall_hashref($query,'itemtype'));
}
=head2 getitemtypeimagedir
my $directory = getitemtypeimagedir( 'opac' );
pass in 'opac' or 'intranet'. Defaults to 'opac'.
returns the full path to the appropriate directory containing images.
=cut
sub getitemtypeimagedir {
my $src = shift || 'opac';
if ($src eq 'intranet') {
return C4::Context->config('intrahtdocs') . '/' .C4::Context->preference('template') . '/img/itemtypeimg';
} else {
return C4::Context->config('opachtdocs') . '/' . C4::Context->preference('opacthemes') . '/itemtypeimg';
}
}
sub getitemtypeimagesrc {
my $src = shift || 'opac';
if ($src eq 'intranet') {
return '/intranet-tmpl' . '/' . C4::Context->preference('template') . '/img/itemtypeimg';
} else {
return '/opac-tmpl' . '/' . C4::Context->preference('opacthemes') . '/itemtypeimg';
}
}
sub getitemtypeimagelocation {
my ( $src, $image ) = @_;
return '' if ( !$image );
require URI::Split;
my $scheme = ( URI::Split::uri_split( $image ) )[0];
return $image if ( $scheme );
return getitemtypeimagesrc( $src ) . '/' . $image;
}
=head3 _getImagesFromDirectory
Find all of the image files in a directory in the filesystem
parameters: a directory name
returns: a list of images in that directory.
Notes: this does not traverse into subdirectories. See
_getSubdirectoryNames for help with that.
Images are assumed to be files with .gif or .png file extensions.
The image names returned do not have the directory name on them.
=cut
sub _getImagesFromDirectory {
my $directoryname = shift;
return unless defined $directoryname;
return unless -d $directoryname;
if ( opendir ( my $dh, $directoryname ) ) {
my @images = grep { /\.(gif|png)$/i } readdir( $dh );
closedir $dh;
@images = sort(@images);
return @images;
} else {
warn "unable to opendir $directoryname: $!";
return;
}
}
=head3 _getSubdirectoryNames
Find all of the directories in a directory in the filesystem
parameters: a directory name
returns: a list of subdirectories in that directory.
Notes: this does not traverse into subdirectories. Only the first
level of subdirectories are returned.
The directory names returned don't have the parent directory name on them.
=cut
sub _getSubdirectoryNames {
my $directoryname = shift;
return unless defined $directoryname;
return unless -d $directoryname;
if ( opendir ( my $dh, $directoryname ) ) {
my @directories = grep { -d File::Spec->catfile( $directoryname, $_ ) && ! ( /^\./ ) } readdir( $dh );
closedir $dh;
return @directories;
} else {
warn "unable to opendir $directoryname: $!";
return;
}
}
=head3 getImageSets
returns: a listref of hashrefs. Each hash represents another collection of images.
{ imagesetname => 'npl', # the name of the image set (npl is the original one)
images => listref of image hashrefs
}
each image is represented by a hashref like this:
{ KohaImage => 'npl/image.gif',
StaffImageUrl => '/intranet-tmpl/prog/img/itemtypeimg/npl/image.gif',
OpacImageURL => '/opac-tmpl/prog/itemtypeimg/npl/image.gif'
checked => 0 or 1: was this the image passed to this method?
Note: I'd like to remove this somehow.
}
=cut
sub getImageSets {
my %params = @_;
my $checked = $params{'checked'} || '';
my $paths = { staff => { filesystem => getitemtypeimagedir('intranet'),
url => getitemtypeimagesrc('intranet'),
},
opac => { filesystem => getitemtypeimagedir('opac'),
url => getitemtypeimagesrc('opac'),
}
};
my @imagesets = (); # list of hasrefs of image set data to pass to template
my @subdirectories = _getSubdirectoryNames( $paths->{'staff'}{'filesystem'} );
foreach my $imagesubdir ( @subdirectories ) {
my @imagelist = (); # hashrefs of image info
my @imagenames = _getImagesFromDirectory( File::Spec->catfile( $paths->{'staff'}{'filesystem'}, $imagesubdir ) );
my $imagesetactive = 0;
foreach my $thisimage ( @imagenames ) {
push( @imagelist,
{ KohaImage => "$imagesubdir/$thisimage",
StaffImageUrl => join( '/', $paths->{'staff'}{'url'}, $imagesubdir, $thisimage ),
OpacImageUrl => join( '/', $paths->{'opac'}{'url'}, $imagesubdir, $thisimage ),
checked => "$imagesubdir/$thisimage" eq $checked ? 1 : 0,
}
);
$imagesetactive = 1 if "$imagesubdir/$thisimage" eq $checked;
}
push @imagesets, { imagesetname => $imagesubdir,
imagesetactive => $imagesetactive,
images => \@imagelist };
}
return \@imagesets;
}
=head2 getnbpages
Returns the number of pages to display in a pagination bar, given the number
of items and the number of items per page.
=cut
sub getnbpages {
my ( $nb_items, $nb_items_per_page ) = @_;
return int( ( $nb_items - 1 ) / $nb_items_per_page ) + 1;
}
=head2 getallthemes
(@themes) = &getallthemes('opac');
(@themes) = &getallthemes('intranet');
Returns an array of all available themes.
=cut
sub getallthemes {
my $type = shift;
my $htdocs;
my @themes;
if ( $type eq 'intranet' ) {
$htdocs = C4::Context->config('intrahtdocs');
}
else {
$htdocs = C4::Context->config('opachtdocs');
}
opendir D, "$htdocs";
my @dirlist = readdir D;
foreach my $directory (@dirlist) {
next if $directory eq 'lib';
-d "$htdocs/$directory/en" and push @themes, $directory;
}
return @themes;
}
sub getFacets {
my $facets;
if ( C4::Context->preference("marcflavour") eq "UNIMARC" ) {
$facets = [
{
idx => 'su-to',
label => 'Topics',
tags => [ qw/ 600ab 601ab 602a 604at 605a 606ax 610a / ],
sep => ' - ',
},
{
idx => 'su-geo',
label => 'Places',
tags => [ qw/ 607a / ],
sep => ' - ',
},
{
idx => 'au',
label => 'Authors',
tags => [ qw/ 700ab 701ab 702ab / ],
sep => C4::Context->preference("UNIMARCAuthorsFacetsSeparator"),
},
{
idx => 'se',
label => 'Series',
tags => [ qw/ 225a / ],
sep => ', ',
},
{
idx => 'location',
label => 'Location',
tags => [ qw/ 995e / ],
},
{
idx => 'ccode',
label => 'CollectionCodes',
tags => [ qw / 099t 955h / ],
}
];
unless ( Koha::Libraries->search->count == 1 )
{
my $DisplayLibraryFacets = C4::Context->preference('DisplayLibraryFacets');
if ( $DisplayLibraryFacets eq 'both'
|| $DisplayLibraryFacets eq 'holding' )
{
push(
@$facets,
{
idx => 'holdingbranch',
label => 'HoldingLibrary',
tags => [qw / 995c /],
}
);
}
if ( $DisplayLibraryFacets eq 'both'
|| $DisplayLibraryFacets eq 'home' )
{
push(
@$facets,
{
idx => 'homebranch',
label => 'HomeLibrary',
tags => [qw / 995b /],
}
);
}
}
}
else {
$facets = [
{
idx => 'su-to',
label => 'Topics',
tags => [ qw/ 650a / ],
sep => '--',
},
# {
# idx => 'su-na',
# label => 'People and Organizations',
# tags => [ qw/ 600a 610a 611a / ],
# sep => 'a',
# },
{
idx => 'su-geo',
label => 'Places',
tags => [ qw/ 651a / ],
sep => '--',
},
{
idx => 'su-ut',
label => 'Titles',
tags => [ qw/ 630a / ],
sep => '--',
},
{
idx => 'au',
label => 'Authors',
tags => [ qw/ 100a 110a 700a / ],
sep => ', ',
},
{
idx => 'se',
label => 'Series',
tags => [ qw/ 440a 490a / ],
sep => ', ',
},
{
idx => 'itype',
label => 'ItemTypes',
tags => [ qw/ 952y 942c / ],
sep => ', ',
},
{
idx => 'location',
label => 'Location',
tags => [ qw / 952c / ],
},
{
idx => 'ccode',
label => 'CollectionCodes',
tags => [ qw / 9528 / ],
}
];
unless ( Koha::Libraries->search->count == 1 )
{
my $DisplayLibraryFacets = C4::Context->preference('DisplayLibraryFacets');
if ( $DisplayLibraryFacets eq 'both'
|| $DisplayLibraryFacets eq 'holding' )
{
push(
@$facets,
{
idx => 'holdingbranch',
label => 'HoldingLibrary',
tags => [qw / 952b /],
}
);
}
if ( $DisplayLibraryFacets eq 'both'
|| $DisplayLibraryFacets eq 'home' )
{
push(
@$facets,
{
idx => 'homebranch',
label => 'HomeLibrary',
tags => [qw / 952a /],
}
);
}
}
}
return $facets;
}
=head2 GetAuthorisedValues
$authvalues = GetAuthorisedValues([$category]);
This function returns all authorised values from the'authorised_value' table in a reference to array of hashrefs.
C<$category> returns authorised values for just one category (optional).
C<$opac> If set to a true value, displays OPAC descriptions rather than normal ones when they exist.
=cut
sub GetAuthorisedValues {
my ( $category, $opac ) = @_;
# Is this cached already?
$opac = $opac ? 1 : 0; # normalise to be safe
my $branch_limit =
C4::Context->userenv ? C4::Context->userenv->{"branch"} : "";
my $cache_key =
"AuthorisedValues-$category-$opac-$branch_limit";
my $cache = Koha::Caches->get_instance();
my $result = $cache->get_from_cache($cache_key);
return $result if $result;
my @results;
my $dbh = C4::Context->dbh;
my $query = qq{
SELECT DISTINCT av.*
FROM authorised_values av
};
$query .= qq{
LEFT JOIN authorised_values_branches ON ( id = av_id )
} if $branch_limit;
my @where_strings;
my @where_args;
if($category) {
push @where_strings, "category = ?";
push @where_args, $category;
}
if($branch_limit) {
push @where_strings, "( branchcode = ? OR branchcode IS NULL )";
push @where_args, $branch_limit;
}
if(@where_strings > 0) {
$query .= " WHERE " . join(" AND ", @where_strings);
}
$query .= ' ORDER BY category, ' . (
$opac ? 'COALESCE(lib_opac, lib)'
: 'lib, lib_opac'
);
my $sth = $dbh->prepare($query);
$sth->execute( @where_args );
while (my $data=$sth->fetchrow_hashref) {
if ($opac && $data->{lib_opac}) {
$data->{lib} = $data->{lib_opac};
}
push @results, $data;
}
$sth->finish;
$cache->set_in_cache( $cache_key, \@results, { expiry => 5 } );
return \@results;
}
=head2 xml_escape
my $escaped_string = C4::Koha::xml_escape($string);
Convert &, <, >, ', and " in a string to XML entities
=cut
sub xml_escape {
my $str = shift;
return '' unless defined $str;
$str =~ s/&/&amp;/g;
$str =~ s/</&lt;/g;
$str =~ s/>/&gt;/g;
$str =~ s/'/&apos;/g;
$str =~ s/"/&quot;/g;
return $str;
}
=head2 display_marc_indicators
my $display_form = C4::Koha::display_marc_indicators($field);
C<$field> is a MARC::Field object
Generate a display form of the indicators of a variable
MARC field, replacing any blanks with '#'.
=cut
sub display_marc_indicators {
my $field = shift;
my $indicators = '';
if ($field && $field->tag() >= 10) {
$indicators = $field->indicator(1) . $field->indicator(2);
$indicators =~ s/ /#/g;
}
return $indicators;
}
sub GetNormalizedUPC {
my ($marcrecord,$marcflavour) = @_;
return unless $marcrecord;
if ($marcflavour eq 'UNIMARC') {
my @fields = $marcrecord->field('072');
foreach my $field (@fields) {
my $upc = _normalize_match_point($field->subfield('a'));
if ($upc) {
return $upc;
}
}
}
else { # assume marc21 if not unimarc
my @fields = $marcrecord->field('024');
foreach my $field (@fields) {
my $indicator = $field->indicator(1);
my $upc = _normalize_match_point($field->subfield('a'));
if ($upc && $indicator == 1 ) {
return $upc;
}
}
}
}
# Normalizes and returns the first valid ISBN found in the record
# ISBN13 are converted into ISBN10. This is required to get some book cover images.
sub GetNormalizedISBN {
my ($isbn,$marcrecord,$marcflavour) = @_;
if ($isbn) {
# Koha attempts to store multiple ISBNs in biblioitems.isbn, separated by " | "
# anything after " | " should be removed, along with the delimiter
($isbn) = split(/\|/, $isbn );
return _isbn_cleanup($isbn);
}
return unless $marcrecord;
if ($marcflavour eq 'UNIMARC') {
my @fields = $marcrecord->field('010');
foreach my $field (@fields) {
my $isbn = $field->subfield('a');
if ($isbn) {
return _isbn_cleanup($isbn);
}
}
}
else { # assume marc21 if not unimarc
my @fields = $marcrecord->field('020');
foreach my $field (@fields) {
$isbn = $field->subfield('a');
if ($isbn) {
return _isbn_cleanup($isbn);
}
}
}
}
sub GetNormalizedEAN {
my ($marcrecord,$marcflavour) = @_;
return unless $marcrecord;
if ($marcflavour eq 'UNIMARC') {
my @fields = $marcrecord->field('073');
foreach my $field (@fields) {
my $ean = _normalize_match_point($field->subfield('a'));
if ( $ean ) {
return $ean;
}
}
}
else { # assume marc21 if not unimarc
my @fields = $marcrecord->field('024');
foreach my $field (@fields) {
my $indicator = $field->indicator(1);
my $ean = _normalize_match_point($field->subfield('a'));
if ( $ean && $indicator == 3 ) {
return $ean;
}
}
}
}
sub GetNormalizedOCLCNumber {
my ($marcrecord,$marcflavour) = @_;
return unless $marcrecord;
if ($marcflavour ne 'UNIMARC' ) {
my @fields = $marcrecord->field('035');
foreach my $field (@fields) {
my $oclc = $field->subfield('a');
if ($oclc && $oclc =~ /OCoLC/) {
$oclc =~ s/\(OCoLC\)//;
return $oclc;
}
}
} else {
# TODO for UNIMARC
}
return
}
sub _normalize_match_point {
my $match_point = shift;
(my $normalized_match_point) = $match_point =~ /([\d-]*[X]*)/;
$normalized_match_point =~ s/-//g;
return $normalized_match_point;
}
sub _isbn_cleanup {
my ($isbn) = @_;
return NormalizeISBN(
{
isbn => $isbn,
format => 'ISBN-10',
strip_hyphens => 1,
}
) if $isbn;
}
=head2 NormalizeISBN
my $isbns = NormalizeISBN({
isbn => $isbn,
strip_hyphens => [0,1],
format => ['ISBN-10', 'ISBN-13']
});
Returns an isbn validated by Business::ISBN.
Optionally strips hyphens and/or forces the isbn
to be of the specified format.
If the string cannot be validated as an isbn,
it returns nothing unless return_invalid param is passed.
#FIXME This routine (and others?) should be moved to Koha::Util::Normalize
=cut
sub NormalizeISBN {
my ($params) = @_;
my $string = $params->{isbn};
my $strip_hyphens = $params->{strip_hyphens};
my $format = $params->{format} || q{};
my $return_invalid = $params->{return_invalid};
return unless $string;
my $isbn = Business::ISBN->new($string);
if ( $isbn && $isbn->is_valid() ) {
if ( $format eq 'ISBN-10' ) {
$isbn = $isbn->as_isbn10();
}
elsif ( $format eq 'ISBN-13' ) {
$isbn = $isbn->as_isbn13();
}
return unless $isbn;
if ($strip_hyphens) {
$string = $isbn->as_string( [] );
} else {
$string = $isbn->as_string();
}
return $string;
} elsif ( $return_invalid ) {
return $string;
}
}
=head2 GetVariationsOfISBN
my @isbns = GetVariationsOfISBN( $isbn );
Returns a list of variations of the given isbn in
both ISBN-10 and ISBN-13 formats, with and without
hyphens.
In a scalar context, the isbns are returned as a
string delimited by ' | '.
=cut
sub GetVariationsOfISBN {
my ($isbn) = @_;
return unless $isbn;
my @isbns;
push( @isbns, NormalizeISBN({ isbn => $isbn, return_invalid => 1 }) );
push( @isbns, NormalizeISBN({ isbn => $isbn, format => 'ISBN-10' }) );
push( @isbns, NormalizeISBN({ isbn => $isbn, format => 'ISBN-13' }) );
push( @isbns, NormalizeISBN({ isbn => $isbn, format => 'ISBN-10', strip_hyphens => 1 }) );
push( @isbns, NormalizeISBN({ isbn => $isbn, format => 'ISBN-13', strip_hyphens => 1 }) );
# Strip out any "empty" strings from the array
@isbns = grep { defined($_) && $_ =~ /\S/ } @isbns;
return wantarray ? @isbns : join( " | ", @isbns );
}
=head2 GetVariationsOfISBNs
my @isbns = GetVariationsOfISBNs( @isbns );
Returns a list of variations of the given isbns in
both ISBN-10 and ISBN-13 formats, with and without
hyphens.
In a scalar context, the isbns are returned as a
string delimited by ' | '.
=cut
sub GetVariationsOfISBNs {
my (@isbns) = @_;
@isbns = map { GetVariationsOfISBN( $_ ) } @isbns;
return wantarray ? @isbns : join( " | ", @isbns );
}
=head2 NormalizedISSN
my $issns = NormalizedISSN({
issn => $issn,
strip_hyphen => [0,1]
});
Returns an issn validated by Business::ISSN.
Optionally strips hyphen.
If the string cannot be validated as an issn,
it returns nothing.
=cut
sub NormalizeISSN {
my ($params) = @_;
my $string = $params->{issn};
my $strip_hyphen = $params->{strip_hyphen};
my $issn = Business::ISSN->new($string);
if ( $issn && $issn->is_valid ){
if ($strip_hyphen) {
$string = $issn->_issn;
}
else {
$string = $issn->as_string;
}
return $string;
}
}
=head2 GetVariationsOfISSN
my @issns = GetVariationsOfISSN( $issn );
Returns a list of variations of the given issn in
with and without a hyphen.
In a scalar context, the issns are returned as a
string delimited by ' | '.
=cut
sub GetVariationsOfISSN {
my ( $issn ) = @_;
return unless $issn;
my @issns;
my $str = NormalizeISSN({ issn => $issn });
if( $str ) {
push @issns, $str;
push @issns, NormalizeISSN({ issn => $issn, strip_hyphen => 1 });
} else {
push @issns, $issn;
}
# Strip out any "empty" strings from the array
@issns = grep { defined($_) && $_ =~ /\S/ } @issns;
return wantarray ? @issns : join( " | ", @issns );
}
=head2 GetVariationsOfISSNs
my @issns = GetVariationsOfISSNs( @issns );
Returns a list of variations of the given issns in
with and without a hyphen.
In a scalar context, the issns are returned as a
string delimited by ' | '.
=cut
sub GetVariationsOfISSNs {
my (@issns) = @_;
@issns = map { GetVariationsOfISSN( $_ ) } @issns;
return wantarray ? @issns : join( " | ", @issns );
}
1;
__END__
=head1 AUTHOR
Koha Team
=cut