-#--------------------------------------
-# Determine if a number is a valid ISBN number, according to length
-# of 10 digits and valid checksum
-sub checkvalidisbn {
- use strict;
- my ($q)=@_ ; # Input: ISBN number
-
- my $isbngood = 0; # Return: true or false
-
- $q=~s/x$/X/g; # upshift lower case X
- $q=~s/[^X\d]//g;
- $q=~s/X.//g;
- if (length($q)==10) {
- my $checksum=substr($q,9,1);
- my $isbn=substr($q,0,9);
- my $i;
- my $c=0;
- for ($i=0; $i<9; $i++) {
- my $digit=substr($q,$i,1);
- $c+=$digit*(10-$i);
- }
- $c=$c%11; # % is the modulus function
- ($c==10) && ($c='X');
- if ($c eq $checksum) {
- $isbngood=1;
- } else {
- $isbngood=0;
- }
- } else {
- $isbngood=0;
- } # if length good
-
- return $isbngood;
-
-} # sub checkvalidisbn
-
-
+=item checkvalidisbn # Obsolete Function!
+
+ $valid = &checkvalidisbn($isbn);
+
+Returns a true value iff C<$isbn> is a valid ISBN: it must be ten
+digits long (counting "X" as a digit), and must have a valid check
+digit at the end.
+
+sub checkvalidisbn ($) { # Obsolete Function!
+ my ($q) = shift or return undef;
+ $q=~s/[^Xx\d]//g;
+ /(\d{9})(X|\d)/i or
+ /(\d{12})(X|\d)/i or return 0;
+ my $checksum = $2;
+ my $isbn = $1;
+ my $c = 0;
+ my $max = length $isbn;
+ for (my $i=0; $i<$max; $i++) {
+ my $digit=substr($q,$i,1);
+ $c+=$digit*(10-$i);
+ }
+ $c %= 11;
+ ($c==10) and $c = 'X';
+ return ($c eq $checksum) ? 1 : 0;
+}
+
+=item buildCGISort
+
+ $CGIScrollingList = &buildCGISort($name string, $input_name string);
+
+Returns the scrolling list with name $input_name, built on authorised Values named $name.
+Returns NULL if no authorised values found
+
+=cut
+
+sub buildCGIsort {
+ my ($name,$input_name,$data) = @_;
+ my $dbh=C4::Context->dbh;
+ my $query=qq{SELECT * FROM authorised_values WHERE category=? order by lib};
+ my $sth=$dbh->prepare($query);
+ $sth->execute($name);
+ my $CGISort;
+ if ($sth->rows>0){
+ my @values;
+ my %labels;
+
+ for (my $i =0;$i<$sth->rows;$i++){
+ my $results = $sth->fetchrow_hashref;
+ push @values, $results->{authorised_value};
+ $labels{$results->{authorised_value}}=$results->{lib};
+ }
+ unshift(@values,"");
+ $CGISort= CGI::scrolling_list(
+ -name => $input_name,
+ -values => \@values,
+ -labels => \%labels,
+ -default=> $data,
+ -size => 1,
+ -multiple => 0);
+ }
+ $sth->finish;
+ return $CGISort;
+}