# The LearningOnline Network with CAPA
# mutliple choice style responses
# 11/23,11/24,11/28 Gerd Kortemeyer
package Apache::radiobuttonresponse;
use strict;
sub BEGIN {
&Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse'));
}
sub start_radiobuttonresponse {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
#when in a radiobutton response use these
&Apache::lonxml::register('Apache::radiobuttonresponse',('foilgroup','foil'));
my $id = &Apache::response::start_response($parstack,$safeeval);
return '';
}
sub end_radiobuttonresponse {
&Apache::response::end_response;
return '';
}
%Apache::response::foilgroup={};
sub start_foilgroup {
%Apache::response::foilgroup={};
}
#FIXME needs to stablely do random picks
sub end_foilgroup {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
my $name;
my $result;
my @names = @{ $Apache::response::foilgroup{'names'} };
my @truelist;
my @falselist;
my $rndseed=&Apache::lonnet::rndseed();
$rndseed=$rndseed
+&Apache::lonnet::numval($Apache::inputtags::part)
+&Apache::lonnet::numval($Apache::inputtags::response['-1']);
srand($rndseed*10);
foreach $name (@names) {
$result.="
$name is $Apache::response::foilgroup{$name.'.value'} ";
if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
push (@truelist,$name);
} elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
push (@falselist,$name);
} elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {
} else {
&Apache::lonxml::error("Unknow state $Apache::response::foilgroup{$name.'.value'} for $name in ");
}
}
my $rrargs ='';
if ( $#$parstack > 0 ) { $rrargs=$$parstack['-2']; }
my $max = &Apache::run::run("{$rrargs;".'return $max}',$safeeval);
my $whichtrue = rand $#truelist;
&Apache::lonxml::debug("Max is $max, From $#truelist elms, picking $whichtrue");
my @whichfalse =();
my $temp=0;
while ((($#whichfalse+2) < $max) && ($#falselist > -1)) {
my $afalse=rand $#falselist;
&Apache::lonxml::debug("From $#falselist elms, picking $afalse");
$afalse=splice(@falselist,$afalse,1);
&Apache::lonxml::debug("Picked $afalse");
push (@whichfalse,$afalse);
}
my $where = rand $max;
splice(@whichfalse,$where,0,$truelist[$whichtrue]);
my $temp;
foreach $temp (@whichfalse) {
$result.=''.$Apache::response::foilgroup{$temp.'.text'}."
\n";
}
return $result;
}
sub start_foil {
&Apache::lonxml::debug("redirection be $Apache::lonxml::redirection");
$Apache::lonxml::redirection--;
}
sub end_foil {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
if ($target eq 'web' || $target eq 'grade') {
my $args ='';
if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);
push @{ $Apache::response::foilgroup{'names'} }, $name;
my $value = &Apache::run::run("{$args;".'return $value}',$safeeval);
$Apache::response::foilgroup{"$name.value"} = $value;
$Apache::response::foilgroup{"$name.text"} = $Apache::lonxml::outputstack;
}
$Apache::lonxml::redirection++;
&Apache::lonxml::debug("redirection is $Apache::lonxml::redirection");
if ($Apache::lonxml::redirection == 1) {
&Apache::lonxml::debug("reset $Apache::lonxml::outputstack");
$Apache::lonxml::outputstack='';
}
return '';
}
1;
__END__