Return to radiobuttonresponse.pm CVS log

Up to [LON-CAPA] / loncom / homework

- changed redirection, and output stack to work more intelligently, checkount radiobuttonresponse for a good example, should have to muck with @Apache::lonxml::outputstack and $Apache::lonxml::redirection directly use startredirection and enredirection

# The LearningOnline Network with CAPA
# mutliple choice style responses
# 2/21 Guy

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={};
  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 $name;
    &setrandomnumber();
    my ($truecnt,$falsecnt,$max) = &getfoilcounts($parstack,$safeeval);
    my $count=0;
    # we will add in 1 of the true statements
    if (($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; }
    my $answer = int(rand ($count));
    &Apache::lonxml::debug("Answer is $answer, $count from $max, $falsecnt");
    if ($target eq 'web') {
      $result=&displayfoils($max,$answer);
    } elsif ( $target eq 'grade') {
      if ( defined $ENV{'form.submitted'}) {
	my $response = $ENV{'form.HWVAL'.$Apache::inputtags::response['-1']};
	if ( $response =~ /[^\s]/) {
	  my $id = $Apache::inputtags::response['-1'];
	  $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}=$response;
	  &Apache::lonxml::debug("submitted a $response<br />\n");
	  if ($response == $answer) {
	    $Apache::lonhomework::results{"resource.$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 @names = @{ $Apache::response::foilgroup{'names'} };
  my $truecnt=0;
  my $falsecnt=0;
  my $name;

  foreach $name (@names) {
    if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
      $truecnt++;
    } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
      $falsecnt++;
    }
  }
  return ($truecnt,$falsecnt,$max);
}

sub displayfoils {
  my ($max,$answer)=@_;
  my @names = @{ $Apache::response::foilgroup{'names'} };
  my @truelist;
  my @falselist;
  my $result;
  my $name;

  foreach $name (@names) {
    #result.="<br /><b>$name</b> is <i> $Apache::response::foilgroup{$name.'.value'} </i>";
    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("Unknown state $Apache::response::foilgroup{$name.'.value'} for $name in <foilgroup>");
    }
  }
  my $whichtrue = rand $#truelist;
  &Apache::lonxml::debug("Max is $max, From $#truelist elms, picking $whichtrue");
  my @whichfalse =();
  while ((($#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);
  }
  splice(@whichfalse,$answer,0,$truelist[$whichtrue]);
  &Apache::lonxml::debug("the true statement is $answer");
  if ($Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"} =~ /^correct/ ) {
    foreach $name (@whichfalse) {
      $result.="<br />";
      if ($Apache::response::foilgroup{$name.'.value'} eq 'true') { 
	$result.='Correct';
      } else {
	$result.='Incorrect';
      }
      $result.=":".$Apache::response::foilgroup{$name.'.text'}."</input>\n";
    }
  } else {
    my $temp=0;
    foreach $name (@whichfalse) {
      $result.="<br /><input type=\"radio\" name=\"HWVAL$Apache::inputtags::response['-1']\" value=\"$temp\">".$Apache::response::foilgroup{$name.'.text'}."</input>\n";
      $temp++;
    }
  }
  return $result."<br />";
}

sub start_foil {
  &Apache::lonxml::startredirection;
  return '';
}

sub end_foil {
  my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
  my $foil=&Apache::lonxml::endredirection;
  if ($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"} = $foil;
  }
  return '';
}

1;
__END__