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Diff for /loncom/homework/response.pm between versions 1.21 and 1.90

version 1.21, 2001/02/07 00:29:59 version 1.90, 2004/02/09 19:38:00
Line 1 Line 1
 # The LearningOnline Network with CAPA  # The LearningOnline Network with CAPA
 # various response type definitons response definition  # various response type definitons response definition
   #
 # 11/23,11/24,11/28 Gerd Kortemeyer  # $Id$
   #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA 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 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA 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 LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
   
 package Apache::response;  package Apache::response;
 use strict;  use strict;
   
 sub BEGIN {  BEGIN {
   &Apache::lonxml::register('Apache::response',('responseparam','caparesponse','numericalresponse','radiobuttonresponse','optionresponse','imageresponse'));      &Apache::lonxml::register('Apache::response',('responseparam','parameter','dataresponse'));
 }  }
   
 sub start_response {  sub start_response {
   my ($parstack,$safeeval)=@_;        my ($parstack,$safeeval)=@_;
   my $args ='';      my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
   if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }      if ($id eq '') { $id = $Apache::lonxml::curdepth; }
   my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);      if ($#Apache::inputtags::import > -1) {
   if ($id eq '') { $id = $Apache::lonxml::curdepth; }   &Apache::lonxml::debug("Turning :$id: into");
   push (@Apache::inputtags::response,$id);   $id = join('_',@Apache::inputtags::import).'_'.$id;
   push (@Apache::inputtags::responselist,$id);   &Apache::lonxml::debug("New  :$id:");
   @Apache::inputtags::inputlist=();      }
   return $id;      push (@Apache::inputtags::response,$id);
       push (@Apache::inputtags::responselist,$id);
       @Apache::inputtags::inputlist=();
       return $id;
 }  }
   
 sub end_response {  sub end_response {
   pop @Apache::inputtags::response;      #pop @Apache::inputtags::response;
   @Apache::inputtags::inputlist=();      @Apache::inputtags::inputlist=();
   return '';      return '';
   }
   
   sub start_hintresponse {
       my ($parstack,$safeeval)=@_;
       my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
       if ($id eq '') { $id = $Apache::lonxml::curdepth; }
       push (@Apache::inputtags::response,$id);
       push (@Apache::inputtags::responselist,$id);
       push (@Apache::inputtags::paramstack,[%Apache::inputtags::params]);
       return $id;
   }
   
   sub end_hintresponse {
       pop @Apache::inputtags::response;
       if (defined($Apache::inputtags::paramstack[-1])) {
    %Apache::inputtags::params=
       @{ pop(@Apache::inputtags::paramstack) };
       }
       return '';
   }
   
   # used by response to set the non-safe space random number generator to something
   # that is stable and unique based on the part number and response number
   sub setrandomnumber {
       my $rndseed;
       $rndseed=&Apache::structuretags::setup_rndseed();
       if (!defined($rndseed)) { $rndseed=&Apache::lonnet::rndseed(); }
       &Apache::lonxml::debug("randseed $rndseed");
       #  $rndseed=unpack("%32i",$rndseed);
       my $rndmod=(&Apache::lonnet::numval($Apache::inputtags::part) << 10);
       if (defined($Apache::inputtags::response['-1'])) {
    $rndmod+=&Apache::lonnet::numval($Apache::inputtags::response[-1]);
       }
       if ($rndseed =~/,/) {
    {
       use integer;
       my ($num1,$num2)=split(/,/,$rndseed);
       $num1+=$rndmod;
       $num2+=$rndmod;
       $rndseed="$num1,$num2";
    }
       } else {
    $rndseed+=$rndmod;
       }
       &Apache::lonnet::setup_random_from_rndseed($rndseed);
       &Apache::lonxml::debug("randseed $rndseed");
       return '';
 }  }
   
 sub meta_parameter_write {  sub meta_parameter_write {
     my ($name,$type,$default,$display)=@_;      my ($name,$type,$default,$display)=@_;
     return '<parameter part="'.$Apache::inputtags::part.      my $partref=$Apache::inputtags::part;
             '" name="'.$name.      my $result='<parameter part="'.$Apache::inputtags::part.'"';
                     '" type="'.$type.      if (defined($Apache::inputtags::response[-1])) {
                  '" default="'.$default.   $result.=            ' id="'.$Apache::inputtags::response[-1].'"';
          '" display="'.$display.   $partref.='_'.$Apache::inputtags::response[-1];
                           ' [Part: '.$Apache::inputtags::part.']"></parameter>'      }
      ."\n";      $result.=            ' name="'.$name.'"'.
                            ' type="'.$type.'"'.
   (defined($default)?' default="'.$default.'"':'').
   (defined($display)?' display="'.$display.' [Part: '.$partref.']"':'')
                .'></parameter>'
                ."\n";
       return $result;
   }
   
   sub meta_package_write {
       my $name=shift;
       my $result = '<parameter part="'.$Apache::inputtags::part.'"';
       if(defined($Apache::inputtags::response[-1])) {
    $result.= ' id="'.$Apache::inputtags::response[-1].'"';
       }
       $result.=' package="'.$name.'"></parameter>'."\n";
       return $result;
 }  }
   
 sub meta_stores_write {  sub meta_stores_write {
     my ($name,$type,$display)=@_;      my ($name,$type,$display)=@_;
     return '<stores part="'.$Apache::inputtags::part.      my $partref=$Apache::inputtags::part;
          '" name="'.$name.      my $result = '<stores part="'.$Apache::inputtags::part.'"';
                  '" type="'.$type.      if (defined($Apache::inputtags::response[-1])) {
       '" display="'.$display.   $result.=           ' id="'.$Apache::inputtags::response[-1].'"';
                        ' [Part: '.$Apache::inputtags::part.']"></stores>'   $partref.='_'.$Apache::inputtags::response[-1];
      ."\n";      }
       $result.=          ' name="'.$name.'"'.
                          ' type="'.$type.'"'.
               ' display="'.$display.' [Part: '.$partref.']"'.
         "></stores>\n";
 }  }
   
 sub mandatory_part_meta {  sub mandatory_part_meta {
Line 56  sub mandatory_part_meta { Line 149  sub mandatory_part_meta {
 # output (to lonspreadsheet)  # output (to lonspreadsheet)
 # of each part  # of each part
 #  #
  return      return
     &meta_parameter_write('opendate','date_start','',  #    &meta_parameter_write('opendate','date_start','',
                           'Opening Date').  #                          'Opening Date').
     &meta_parameter_write('duedate','date_end','',  #    &meta_parameter_write('duedate','date_end','',
                           'Due Date').  #                          'Due Date').
     &meta_parameter_write('answerdate','date_start','',  #    &meta_parameter_write('answerdate','date_start','',
                           'Show Answer Date').  #                          'Show Answer Date').
     &meta_parameter_write('weight','int_zeropos','',  #    &meta_parameter_write('weight','int_zeropos','',
                           'Available Points').  #                          'Available Points').
     &meta_parameter_write('maxtries','int_pos','',  #    &meta_parameter_write('maxtries','int_pos','',
                           'Maximum Number of Tries').  #                          'Maximum Number of Tries').
    &meta_package_write('part').
     &meta_stores_write('solved','string',          &meta_stores_write('solved','string',
                           'Problem Status').     'Problem Status').
     &meta_stores_write('tries','int_zeropos',          &meta_stores_write('tries','int_zeropos',
                           'Number of Unsuccessful Tries').     'Number of Attempts').
     &meta_stores_write('awarded','float',          &meta_stores_write('awarded','float',
           'Partial Credit Factor');     'Partial Credit Factor');
 #  #
 # Note: responseid-specific data 'submission' and 'awarddetail'  # Note: responseid-specific data 'submission' and 'awarddetail'
 # not available to spreadsheet -> skip here  # not available to spreadsheet -> skip here
 #  #
 }  }
   
   sub meta_part_order {
       if (@Apache::inputtags::partlist) {
    my @parts=@Apache::inputtags::partlist;
    shift(@parts);
    return '<partorder>'.join(',',@parts).'</partorder>';
       } else {
    return '<partorder>0</partorder>';
       }
   }
   
 sub check_for_previous {  sub check_for_previous {
   return '0';      my ($curresponse,$partid,$id) = @_;
       my %previous;
       $previous{'used'} = 0;
       foreach my $key (sort(keys(%Apache::lonhomework::history))) {
    if ($key =~ /resource\.$partid\.$id\.submission/) {
       &Apache::lonxml::debug("Trying $key");
       my $pastresponse=$Apache::lonhomework::history{$key};
       if ($pastresponse eq $curresponse) {
    $previous{'used'} = 1;
    my $history;
    if ( $key =~ /^(\d+):/ ) {
       $history=$1;
       $previous{'award'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
       $previous{'last'}='0';
       push(@{ $previous{'version'} },$history);
    } else {
       $previous{'award'} = $Apache::lonhomework::history{"resource.$partid.$id.awarddetail"};
       $previous{'last'}='1';
    }
    if (! $previous{'award'} ) { $previous{'award'} = 'UNKNOWN'; }
    &Apache::lonxml::debug("got a match :$previous{'award'}:$previous{'used'}:");
       }
    }
       }
       &Apache::lonhomework::showhash(%previous);
       return %previous;
 }  }
   
 sub start_numericalresponse {  sub handle_previous {
   require Apache::caparesponse;       my ($previous,$ad)=@_;
   import Apache::caparesponse;       if ($$previous{'used'} && ($$previous{'award'} eq $ad) ) {
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;   if ($$previous{'last'}) {
   Apache::caparesponse::start_numericalresponse($target,$token,$parstack,$parser,$safeeval,$style);;      push(@Apache::inputtags::previous,'PREVIOUSLY_LAST');
   return "";   } else {
 }      push(@Apache::inputtags::previous,'PREVIOUSLY_USED');
    }
 sub start_caparesponse {   push(@Apache::inputtags::previous_version,$$previous{'version'});
   require Apache::caparesponse;       }
   import Apache::caparesponse;   
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;  
 #  print "\n<br>\nsimple caparesponse\n";  
   Apache::caparesponse::start_caparesponse($target,$token,$parstack,$parser,$safeeval,$style);;  
   return "";  
 }  
   
 sub start_radiobuttonresponse {  
   require Apache::radiobuttonresponse;   
   import Apache::radiobuttonresponse;   
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;  
   Apache::radiobuttonresponse::start_radiobuttonresponse($target,$token,$parstack,$parser,$safeeval,$style);;  
   return "";  
 }  
   
 sub start_optionresponse {  
   require Apache::optionresponse;   
   import Apache::optionresponse;   
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;  
   Apache::optionresponse::start_optionresponse($target,$token,$parstack,$parser,$safeeval,$style);;  
   return "";  
 }  
   
 sub start_imageresponse {  
   require Apache::imageresponse;   
   import Apache::imageresponse;   
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;  
   Apache::imageresponse::start_imageresponse($target,$token,$parstack,$parser,$safeeval,$style);;  
   return "";  
 }  }
   
 sub start_responseparam {  sub view_or_modify {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
   if ($target eq 'grade' || $target eq 'web') {      my $myself=0;
     my $args='';      if ( ($name eq $ENV{'user.name'}) && ($domain eq $ENV{'user.domain'}) ) {
     if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }   $myself=1;
     my $default = &Apache::run::run("{$args;".'return $default}',$safeeval);  
     my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);  
     &Apache::lonxml::debug("looking for resource.$Apache::inputtags::part.$name");  
     my $value = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.$name");  
     &Apache::lonxml::debug("$name has value :$value: and default :$default:");  
     if ($value eq '' || $value eq 'con_lost') {  
       &Apache::lonxml::debug("defaulting");  
       $Apache::inputtags::params{$name}=$default;  
     } else {  
       &Apache::lonxml::debug("using value");  
       $Apache::inputtags::params{$name}=$value;  
     }      }
       my $vgr=&Apache::lonnet::allowed('vgr',$courseid);
       my $mgr=&Apache::lonnet::allowed('vgr',$courseid);
       if ($mgr) { return "M"; }
       if ($vgr) { return "V"; }
       if ($myself) { return "V"; }
     return '';      return '';
   } elsif ($target eq 'meta') {  }
     return &meta_parameter_write($token->[2]->{'name'},  
  $token->[2]->{'type'},  sub start_dataresponse {
  $token->[2]->{'default'},      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  $token->[2]->{'description'});      my $id = &Apache::response::start_response($parstack,$safeeval);
   } else {      my $result;
     return '';      if ($target eq 'web') {
   }   $result = $token->[2]->{'display'}.':';
       } elsif ($target eq 'meta') {
    $result = &Apache::response::meta_stores_write($token->[2]->{'name'},
          $token->[2]->{'type'},
          $token->[2]->{'display'});
    $result .= &Apache::response::meta_package_write('dataresponse');
       }
       return $result;
   }
   
   sub end_dataresponse {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       if ( $target eq 'web' ) {
       } elsif ($target eq 'grade' ) {
    if ( defined $ENV{'form.submitted'}) {
       my ($symb,$courseid,$domain,$name)=&Apache::lonxml::whichuser();
       my $allowed=&Apache::lonnet::allowed('mgr',$courseid);
       if ($allowed) {
    &Apache::response::setup_params('dataresponse');
    my $partid = $Apache::inputtags::part;
    my $id = $Apache::inputtags::response['-1'];
    my $response = $ENV{'form.HWVAL_'.$id};
    my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
    if ( $response =~ /[^\s]/) {
       $Apache::lonhomework::results{"resource.$partid.$id.$name"}=$response;
       $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
       $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}='SUBMITTED';
    }
       } else {
    $result='Not Permitted to change values.'
       }
    }
       }
       &Apache::response::end_response;
       return $result;
   }
   
   sub decide_package {
       my ($tagstack)=@_;
       my $package;
       if ($$tagstack[-1] eq 'parameter') {
    $package='part';
       } else {
    my $i=-1;
    while (defined($$tagstack[$i])) {
       if ($$tagstack[$i] =~ /(response|hint)$/) {
    $package=$$tagstack[$i];
    last;
       }
       $i--;
    }
       }
       return $package;
   }
   
   sub start_responseparam {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result='';
       if ($target eq 'meta') {
    $result = &meta_parameter_write($token->[2]->{'name'},
    $token->[2]->{'type'},
    $token->[2]->{'default'},
    $token->[2]->{'description'});
       } elsif ($target eq 'edit') {
    $result.=&Apache::edit::tag_start($target,$token);
    my $optionlist;
    my $package=&decide_package($tagstack);
    foreach my $key (sort(keys(%Apache::lonnet::packagetab))) {
       if ($key =~ /^\Q$package\E&(.*)&display$/) {
    $optionlist.='<option value="'.$1.'">'.
       $Apache::lonnet::packagetab{$key}.'</option>';
       }
    }
    if (defined($optionlist)) {
       $result.='Use template: <select name="'.
    &Apache::edit::html_element_name('parameter_package').'">'.
       '<option value=""></option>'.$optionlist.'</select><br />';
    }
    $result.=&Apache::edit::text_arg('Name:','name',$token).
       &Apache::edit::text_arg('Type:','type',$token).
    &Apache::edit::text_arg('Description:','description',$token).
       &Apache::edit::text_arg('Default:','default',$token).
    "</td></tr>";
    $result.=&Apache::edit::end_table;
       } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'name','type',
        'description','default');
    my $element=&Apache::edit::html_element_name('parameter_package');
    if (defined($ENV{"form.$element"}) && $ENV{"form.$element"} ne '') {
       my $name=$ENV{"form.$element"};
       my $tag=&decide_package($tagstack);
       $token->[2]->{'name'}=$name;
       $token->[2]->{'type'}=
    $Apache::lonnet::packagetab{"$tag&$name&type"};
       $token->[2]->{'description'}=
    $Apache::lonnet::packagetab{"$tag&$name&display"};
       $token->[2]->{'default'}=
    $Apache::lonnet::packagetab{"$tag&$name&default"};
       $constructtag=1;
    }
    if ($constructtag) {
       $result = &Apache::edit::rebuild_tag($token);
       $result.=&Apache::edit::handle_insert();
    }
       } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
        $target eq 'tex' || $target eq 'analyze' ) {
    if ($ENV{'request.state'} eq 'construct') {
       my $name   =&Apache::lonxml::get_param('name',$parstack,$safeeval);
       my $default=&Apache::lonxml::get_param('default',$parstack,
        $safeeval);
       if ($name) {$Apache::inputtags::params{$name}=$default;}
    }
       }
       return $result;
 }  }
   
 sub end_responseparam {  sub end_responseparam {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       if ($target eq 'edit') { return ('','no'); }
       return '';
   }
   
   sub start_parameter {
       my $result = &start_responseparam(@_);
       return $result;
   }
   
   sub end_parameter {
       my $result = &end_responseparam(@_);
       return $result;
   }
   
   sub reset_params {
       %Apache::inputtags::params=();
   }
   
   sub setup_params {
       my ($tag) = @_;
   
       if ($ENV{'request.state'} eq 'construct') { return; }
       my %paramlist=();
       foreach my $key (keys(%Apache::lonnet::packagetab)) {
    if ($key =~ /^$tag/) {
       my ($package,$name) = split(/&/,$key);
       $paramlist{$name}=1;
    }
       }
       foreach my $key (keys(%paramlist)) {
    my $entry= 'resource.'.$Apache::inputtags::part;
    if (defined($Apache::inputtags::response[-1])) {
       $entry.='_'.$Apache::inputtags::response[-1];
    }
    $entry.='.'.$key;
    &Apache::lonxml::debug("looking for $entry");
    my $value = &Apache::lonnet::EXT("$entry");
    &Apache::lonxml::debug("$key has value :$value:");
    if ($value eq 'con_lost' || $value =~ /^error:/) {
       &Apache::lonxml::debug("using nothing");
       $Apache::inputtags::params{$key}='';
    } else {
       &Apache::lonxml::debug("using value");
       $Apache::inputtags::params{$key}=$value;
    }
       }
   }
   
   sub answer_header {
       my ($type) = @_;
       my $result;
       if ($ENV{'form.answer_output_mode'} eq 'tex') {
    $result = ' \vskip 0 mm \begin{tabular}{|c|}\hline Answer for Part: \verb|'.
                     $Apache::inputtags::part.'| \\\\ \hline ';
       } else {
    $result = '<table border="1"><tr><td>Answer for Part:'.
       $Apache::inputtags::part. '</td>'."\n";
       }
       return $result;
   }
   
   sub answer_part {
       my ($type,$answer) = @_;
       my $result;
       if ($ENV{'form.answer_output_mode'} eq 'tex') {
    $result = ' \verb|'.$answer.'|\\\\ \hline ';
       } else {
    $result = '<td>'.$answer.'</td>';
       }
       return $result;
   }
   
   sub answer_footer {
       my ($type) = @_;
       my $result;
       if ($ENV{'form.answer_output_mode'} eq 'tex') {
    $result = ' \end{tabular} \vskip 0 mm ';
       } else {
    $result = '</tr></table>';
       }
       return $result;
 }  }
   
   sub showallfoils {
       my $return=0;
       if (defined($ENV{'form.showallfoils'}) &&
    $ENV{'request.state'} eq 'construct') {
    $return=1;
       }
       return $return;
   }
   
   sub getresponse {
       my ($temp,$resulttype)=@_;
       my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
       my $response;
       if (!defined($temp)) {
    $temp=1;
       } else {
    $formparm.=":$temp";
       }
       my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
       'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
       'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
       'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
       if ($ENV{'form.submitted'} eq 'scantron') {
    my $part  = $Apache::inputtags::part;
    my $id    = $Apache::inputtags::response[-1];
    $response = $ENV{'scantron.'.($Apache::lonxml::counter+$temp-1).
    '.answer'};
    # save bubbled letter for later
    $Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
       $response;
    if ($resulttype ne 'letter') {
       $response = $let_to_num{$response};
    }
       } else {
    $response = $ENV{$formparm};
       }
       return $response;
   }
   
   sub repetition {
       my $id = $Apache::inputtags::part;
       my $weight = &Apache::lonnet::EXT("resource.$id.weight");
       my $repetition = int $weight/9;
       if ($weight % 9 != 0) {$repetition++;} 
       return $repetition;
   }
   
   sub scored_response {
       my ($part,$id)=@_;
       my $repetition=&repetition();
       my $score=0;
       for (my $i=0;$i<$repetition;$i++) {
    my $increase=&Apache::response::getresponse($i+1);
    if ($increase ne '') { $score+=$increase+1; }
       }
       my $weight = &Apache::lonnet::EXT("resource.$part.weight");
       my $pcr=$score/$weight;
       $Apache::lonhomework::results{"resource.$part.$id.awarded"}=$pcr;
       $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
    'ASSIGNED_SCORE';
       return $repetition;
   }
   
   sub whichorder {
       my ($max,$randomize,$showall,$hash)=@_;
       #&Apache::lonxml::debug("man $max randomize $randomize");
       if (!defined(@{ $$hash{'names'} })) { return; }
       my @names = @{ $$hash{'names'} };
       my @whichopt =();
       my (%top,@toplist,%bottom,@bottomlist);
       if (!($showall || ($randomize eq 'no'))) {
    my $current=0;
    foreach my $name (@names) {
       $current++;
       if ($$hash{"$name.location"} eq 'top') {
    $top{$name}=$current;
       } elsif ($$hash{"$name.location"} eq 'bottom') {
    $bottom{$name}=$current;
       }
    }
       }
       my $topcount=0;
       my $bottomcount=0;
       while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall)
      && ($#names > -1)) {
    #&Apache::lonxml::debug("Have $#whichopt max is $max");
    my $aopt;
    if ($showall || ($randomize eq 'no')) {
       $aopt=0;
    } else {
       $aopt=int(&Math::Random::random_uniform() * ($#names+1));
    }
    #&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
    $aopt=splice(@names,$aopt,1);
    #&Apache::lonxml::debug("Picked $aopt");
    if ($top{$aopt}) {
       $toplist[$top{$aopt}]=$aopt;
       $topcount++;
    } elsif ($bottom{$aopt}) {
       $bottomlist[$bottom{$aopt}]=$aopt;
       $bottomcount++;
    } else {
       push (@whichopt,$aopt);
    }
       }
       for (my $i=0;$i<=$#toplist;$i++) {
    if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
       }
       for (my $i=0;$i<=$#bottomlist;$i++) {
    if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
       }
       return @whichopt;
   }
   
   sub show_answer {
       my $part   = $Apache::inputtags::part;
       my $award  = $Apache::lonhomework::history{"resource.$part.solved"};
       my $status = $Apache::inputtags::status[-1];
       return  ( ($award =~ /^correct/
          && lc($Apache::lonhomework::problemstatus) ne 'no')
         || $status eq "SHOW_ANSWER");
   }
   
   sub analyze_store_foilgroup {
       my ($shown,$attrs)=@_;
       my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
       foreach my $name (@{ $Apache::response::foilgroup{'names'} }) {
    if (defined($Apache::lonhomework::analyze{"$part_id.foil.value.$name"})) { next; }
    push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },$name);
    foreach my $attr (@$attrs) {
       $Apache::lonhomework::analyze{"$part_id.foil.".$attr.".$name"} =
    $Apache::response::foilgroup{"$name.".$attr};
    }
       }
       push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} }, @{ $shown });
   }
   
   sub pick_foil_for_concept {
       my ($target,$attrs,$hinthash,$parstack,$safeeval)=@_;
       if (not defined(@{ $Apache::response::conceptgroup{'names'} })) { return; }
       my @names = @{ $Apache::response::conceptgroup{'names'} };
       my $pick=int(&Math::Random::random_uniform() * ($#names+1));
       my $name=$names[$pick];
       push @{ $Apache::response::foilgroup{'names'} }, $name;
       foreach my $attr (@$attrs) {
    $Apache::response::foilgroup{"$name.".$attr} =
       $Apache::response::conceptgroup{"$name.".$attr};
       }
       my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
       $Apache::response::foilgroup{"$name.concept"} = $concept;
       &Apache::lonxml::debug("Selecting $name in $concept");
       my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
       if ($target eq 'analyze') {
    push (@{ $Apache::lonhomework::analyze{"$part_id.concepts"} },
         $concept);
    $Apache::lonhomework::analyze{"$part_id.concept.$concept"}=
       $Apache::response::conceptgroup{'names'};
    foreach my $name (@{ $Apache::response::conceptgroup{'names'} }) {
       push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },
     $name);
       foreach my $attr (@$attrs) {
    $Apache::lonhomework::analyze{"$part_id.foil.$attr.$name"}=
       $Apache::response::conceptgroup{"$name.$attr"};
       }
    }
       }
       push(@{ $hinthash->{"$part_id.concepts"} },$concept);
       $hinthash->{"$part_id.concept.$concept"}=
    $Apache::response::conceptgroup{'names'};
   
   }
   
   
 1;  1;
 __END__  __END__
     
Removed from v.1.21  
changed lines
  Added in v.1.90

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