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- <br> -> <br /> cleanup

# The LearningOnline Network with CAPA
# option list style responses

package Apache::optionresponse;
use strict;

sub BEGIN {
  &Apache::lonxml::register('Apache::optionresponse',('optionresponse'));
}

sub start_optionresponse {
  my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
  #when in a radiobutton response use these
  &Apache::lonxml::register('Apache::optionresponse',('foilgroup','foil','conceptgroup'));
  my $id = &Apache::response::start_response($parstack,$safeeval);
  return '';
}

sub end_optionresponse {
  &Apache::response::end_response;
  return '';
}

%Apache::response::foilgroup={};
sub start_foilgroup {
  %Apache::response::foilgroup={};
  return '';
}

sub setrandomnumber {
  my $rndseed=&Apache::lonnet::rndseed();
  $rndseed=unpack("%32i",$rndseed);
  $rndseed=$rndseed
    +&Apache::lonnet::numval($Apache::inputtags::part)
      +&Apache::lonnet::numval($Apache::inputtags::response['-1']);
  srand($rndseed);
  return '';
}

sub end_foilgroup {
  my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
  
  my $result;
  if ($target ne 'meta') {
    my $name;
    &setrandomnumber();
    my ($count,$max) = &getfoilcounts($parstack,$safeeval);
    if ($count>$max) { $count=$max } 
    &Apache::lonxml::debug("Count is $count from $max");
    my $args ='';
    if ( $#$parstack > 0 ) { $args=$$parstack['-1']; }
    my @opt;
    eval '@opt ='.&Apache::run::run("{$args;".'return $options}',$safeeval);
    if ($target eq 'web') {
      $result=&displayfoils($count,@opt);
    } elsif ( $target eq 'grade') {
      if ( defined $ENV{'form.submitted'}) {
	my @whichopt = &whichfoils($count);
	my $temp=1;my $name;
	my $allresponse;
	my $right=0;
	my $wrong=0;
	foreach $name (@whichopt) {
	  my $response = $ENV{'form.HWVAL_'.$Apache::inputtags::response['-1'].":$temp"};
	  $allresponse.="$response:";
	  if ( $response =~ /[^\s]/) {
	    &Apache::lonxml::debug("submitted a $response<br />\n");
	    my $value=$Apache::response::foilgroup{$name.'.value'};
	    if ($value eq $response) {$right++;} else {$wrong++;}
	  }
	  $temp++;
	}
	my $id = $Apache::inputtags::response['-1'];
	$Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}=$allresponse;
	&Apache::lonxml::debug("Got $right right and $wrong wrong");
	if ($wrong==0) {
	  $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='EXACT_ANS';
	} else {
	  $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='INCORRECT';
	}
      }
    }
  }
  return $result;
}

sub getfoilcounts {
  my ($parstack,$safeeval)=@_;
  my $rrargs ='';
  if ( $#$parstack > 0 ) { $rrargs=$$parstack['-2']; }
  my $max = &Apache::run::run("{$rrargs;".'return $max}',$safeeval);
  my $count = $#{ $Apache::response::foilgroup{'names'} };
  return ($count,$max);
}

sub whichfoils {
  my ($max)=@_;
  my @names = @{ $Apache::response::foilgroup{'names'} };
  my @whichopt =();
  while ((($#whichopt+1) < $max) && ($#names > -1)) {
    my $aopt=int rand $#names;
    &Apache::lonxml::debug("From $#names elms, picking $aopt");
    $aopt=splice(@names,$aopt,1);
    &Apache::lonxml::debug("Picked $aopt");
    push (@whichopt,$aopt);
  }
  return @whichopt;
}

sub displayfoils {
  my ($max,@opt)=@_;
  my @names = @{ $Apache::response::foilgroup{'names'} };
  my @truelist;
  my @falselist;
  my $result;
  my $name;
  my @whichopt = &whichfoils($max);
  my $optionlist="<option></option>\n";
  my $option;
  foreach $option (@opt) {
    $optionlist.="<option>$option</option>\n";
  }
  if ($Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"} =~ /^correct/ ) {
    foreach $name (@whichopt) {
      $result.="<br />".$Apache::response::foilgroup{$name.'.value'}.
	":".$Apache::response::foilgroup{$name.'.text'}."\n";
    }
  } else {
    my $temp=1;
    foreach $name (@whichopt) {
      $result.="<br /><select name=\"HWVAL_$Apache::inputtags::response['-1']:$temp\">"
	.$optionlist
	  ."</select>\n".$Apache::response::foilgroup{$name.'.text'}."\n";
      $temp++;
    }
  }
  return $result."<br />";
}

sub start_conceptgroup {
}

sub end_conceptgroup {
}

sub start_foil {
  my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
  if ($target eq 'web') { 
    $Apache::lonxml::redirection--; 
  }
  return '';
}

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 $value = &Apache::run::run("{$args;".'return $value}',$safeeval);
    if ($value ne 'unused') {
      my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);
      push @{ $Apache::response::foilgroup{'names'} }, $name;
      $Apache::response::foilgroup{"$name.value"} = $value;
      $Apache::response::foilgroup{"$name.text"} = $Apache::lonxml::outputstack;
    }
  }
  if ($target eq 'web' ) {
    $Apache::lonxml::redirection++;
    if ($Apache::lonxml::redirection == 1) { 
      $Apache::lonxml::outputstack=''; 
    }
  }
  return '';
}

1;
__END__