Annotation of loncom/homework/response.pm, revision 1.80

1.38      albertel    1: # The LearningOnline Network with CAPA
1.1       albertel    2: # various response type definitons response definition
1.53      albertel    3: #
1.80    ! albertel    4: # $Id: response.pm,v 1.79 2003/05/23 19:37:33 albertel Exp $
1.53      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.7       www        28: # 11/23,11/24,11/28 Gerd Kortemeyer
1.38      albertel   29: # Guy Albertelli
1.39      www        30: # 08/04,08/07 Gerd Kortemeyer
1.5       www        31: 
1.1       albertel   32: package Apache::response;
                     33: use strict;
                     34: 
1.57      harris41   35: BEGIN {
1.73      albertel   36:     &Apache::lonxml::register('Apache::response',('responseparam','parameter','dataresponse'));
1.1       albertel   37: }
                     38: 
1.13      albertel   39: sub start_response {
1.73      albertel   40:     my ($parstack,$safeeval)=@_;
                     41:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
                     42:     if ($id eq '') { $id = $Apache::lonxml::curdepth; }
                     43:     if ($#Apache::inputtags::import > -1) {
                     44: 	&Apache::lonxml::debug("Turning :$id: into");
                     45: 	$id = join('_',@Apache::inputtags::import).'_'.$id;
                     46: 	&Apache::lonxml::debug("New  :$id:");
                     47:     }
                     48:     push (@Apache::inputtags::response,$id);
                     49:     push (@Apache::inputtags::responselist,$id);
                     50:     @Apache::inputtags::inputlist=();
                     51:     return $id;
1.13      albertel   52: }
                     53: 
                     54: sub end_response {
1.79      albertel   55:     #pop @Apache::inputtags::response;
1.73      albertel   56:     @Apache::inputtags::inputlist=();
                     57:     return '';
1.13      albertel   58: }
                     59: 
1.41      albertel   60: sub start_hintresponse {
1.73      albertel   61:     my ($parstack,$safeeval)=@_;
                     62:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
                     63:     if ($id eq '') { $id = $Apache::lonxml::curdepth; }
                     64:     push (@Apache::inputtags::response,$id);
1.79      albertel   65:     push (@Apache::inputtags::responselist,$id);
1.73      albertel   66:     push (@Apache::inputtags::paramstack,[%Apache::inputtags::params]);
                     67:     return $id;
1.41      albertel   68: }
                     69: 
                     70: sub end_hintresponse {
1.73      albertel   71:     pop @Apache::inputtags::response;
                     72:     if (defined($Apache::inputtags::paramstack[-1])) {
                     73: 	%Apache::inputtags::params=
                     74: 	    @{ pop(@Apache::inputtags::paramstack) };
                     75:     }
                     76:     return '';
1.41      albertel   77: }
                     78: 
1.38      albertel   79: # used by response to set the non-safe space random number generator to something
                     80: # that is stable and unique based on the part number and response number
1.26      albertel   81: sub setrandomnumber {
1.73      albertel   82:     my $rndseed;
                     83:     if ($ENV{'request.state'} eq "construct") {
                     84: 	$rndseed=$ENV{'form.rndseed'};
                     85: 	if (!$rndseed) { $rndseed=time; }
                     86:     } else {
1.74      albertel   87: 	$rndseed=&Apache::lonnet::rndseed();
1.73      albertel   88:     }
                     89:     &Apache::lonxml::debug("randseed $rndseed");
                     90:     #  $rndseed=unpack("%32i",$rndseed);
1.74      albertel   91:     my $rndmod=(&Apache::lonnet::numval($Apache::inputtags::part) << 10);
1.73      albertel   92:     if (defined($Apache::inputtags::response['-1'])) {
1.74      albertel   93:        $rndmod+=&Apache::lonnet::numval($Apache::inputtags::response[-1]);
1.73      albertel   94:     }
1.74      albertel   95:     if ($rndseed =~/,/) {
                     96: 	my ($num1,$num2)=split(/,/,$rndseed);
                     97: 	$num1+=$rndmod;
                     98: 	$num2+=$rndmod;
                     99: 	$rndseed="$num1,$num2";
                    100:     } else {
                    101: 	$rndseed+=$rndmod;
                    102:     }
                    103:     &Apache::lonnet::setup_random_from_rndseed($rndseed);
1.73      albertel  104:     &Apache::lonxml::debug("randseed $rndseed");
                    105:     return '';
1.26      albertel  106: }
                    107: 
1.7       www       108: sub meta_parameter_write {
1.38      albertel  109:     my ($name,$type,$default,$display)=@_;
1.41      albertel  110:     my $partref=$Apache::inputtags::part;
                    111:     my $result='<parameter part="'.$Apache::inputtags::part.'"';
                    112:     if (defined($Apache::inputtags::response[-1])) {
1.73      albertel  113: 	$result.=            ' id="'.$Apache::inputtags::response[-1].'"';
                    114: 	$partref.='_'.$Apache::inputtags::response[-1];
1.41      albertel  115:     }
                    116:     $result.=            ' name="'.$name.'"'.
                    117:                          ' type="'.$type.'"'.
                    118: ($default?' default="'.$default.'"':'').
                    119: ($display?' display="'.$display.' [Part: '.$partref.']"':'')
                    120:              .'></parameter>'
                    121:              ."\n";
                    122:     return $result;
1.33      www       123: }
                    124: 
                    125: sub meta_package_write {
                    126:     my $name=shift;
1.41      albertel  127:     my $result = '<parameter part="'.$Apache::inputtags::part.'"';
                    128:     if(defined($Apache::inputtags::response[-1])) {
1.73      albertel  129: 	$result.= ' id="'.$Apache::inputtags::response[-1].'"';
1.41      albertel  130:     }
                    131:     $result.=' package="'.$name.'"></parameter>'."\n";
                    132:     return $result;
1.7       www       133: }
                    134: 
                    135: sub meta_stores_write {
1.10      www       136:     my ($name,$type,$display)=@_;
1.41      albertel  137:     my $partref=$Apache::inputtags::part;
                    138:     my $result = '<stores part="'.$Apache::inputtags::part.'"';
                    139:     if (defined($Apache::inputtags::response[-1])) {
1.73      albertel  140: 	$result.=           ' id="'.$Apache::inputtags::response[-1].'"';
                    141: 	$partref.='_'.$Apache::inputtags::response[-1];
1.41      albertel  142:     }	
                    143:     $result.=          ' name="'.$name.'"'.
                    144:                        ' type="'.$type.'"'.
                    145: 	            ' display="'.$display.' [Part: '.$partref.']"'.
                    146: 		      "></stores>\n";
1.7       www       147: }
                    148: 
                    149: sub mandatory_part_meta {
                    150: #
                    151: # Autogenerate metadata for mandatory
                    152: # input (from RAT or lonparmset) and 
                    153: # output (to lonspreadsheet)
                    154: # of each part
                    155: #
1.73      albertel  156:     return
1.34      www       157: #    &meta_parameter_write('opendate','date_start','',
                    158: #                          'Opening Date').
                    159: #    &meta_parameter_write('duedate','date_end','',
                    160: #                          'Due Date').
                    161: #    &meta_parameter_write('answerdate','date_start','',
                    162: #                          'Show Answer Date').
                    163: #    &meta_parameter_write('weight','int_zeropos','',
                    164: #                          'Available Points').
                    165: #    &meta_parameter_write('maxtries','int_pos','',
                    166: #                          'Maximum Number of Tries').
1.73      albertel  167: 	&meta_package_write('part').
                    168:         &meta_stores_write('solved','string',
                    169: 			   'Problem Status').
                    170:         &meta_stores_write('tries','int_zeropos',
                    171: 			   'Number of Attempts').
                    172:         &meta_stores_write('awarded','float',
                    173: 			   'Partial Credit Factor');
1.7       www       174: #
                    175: # Note: responseid-specific data 'submission' and 'awarddetail'
                    176: # not available to spreadsheet -> skip here
                    177: #
1.14      albertel  178: }
                    179: 
1.15      albertel  180: sub check_for_previous {
1.73      albertel  181:     my ($curresponse,$partid,$id) = @_;
                    182:     my %previous;
                    183:     $previous{'used'} = 0;
                    184:     foreach my $key (sort(keys(%Apache::lonhomework::history))) {
                    185: 	if ($key =~ /resource\.$partid\.$id\.submission/) {
                    186: 	    &Apache::lonxml::debug("Trying $key");
                    187: 	    my $pastresponse=$Apache::lonhomework::history{$key};
                    188: 	    if ($pastresponse eq $curresponse) {
                    189: 		$previous{'used'} = 1;
                    190: 		my $history;
                    191: 		if ( $key =~ /^(\d+):/ ) {
                    192: 		    $history=$1;
                    193: 		    $previous{'award'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
                    194: 		    $previous{'last'}='0';
                    195: 		    push(@{ $previous{'version'} },$history);
                    196: 		} else {
                    197: 		    $previous{'award'} = $Apache::lonhomework::history{"resource.$partid.$id.awarddetail"};
                    198: 		    $previous{'last'}='1';
                    199: 		}
                    200: 		if (! $previous{'award'} ) { $previous{'award'} = 'UNKNOWN';	}
                    201: 		&Apache::lonxml::debug("got a match :$previous{'award'}:$previous{'used'}:");
                    202: 	    }
1.32      albertel  203: 	}
1.73      albertel  204:     }
                    205:     &Apache::lonhomework::showhash(%previous);
                    206:     return %previous;
1.54      albertel  207: }
                    208: 
                    209: sub handle_previous {
1.73      albertel  210:     my ($previous,$ad)=@_;
                    211:     if ($$previous{'used'} && ($$previous{'award'} eq $ad) ) {
                    212: 	if ($$previous{'last'}) {
                    213: 	    push(@Apache::inputtags::previous,'PREVIOUSLY_LAST');
                    214: 	} else {
                    215: 	    push(@Apache::inputtags::previous,'PREVIOUSLY_USED');
                    216: 	}
                    217: 	push(@Apache::inputtags::previous_version,$$previous{'version'});
1.54      albertel  218:     }
1.44      albertel  219: }
                    220: 
1.45      albertel  221: sub view_or_modify {
1.73      albertel  222:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    223:     my $myself=0;
                    224:     if ( ($name eq $ENV{'user.name'}) && ($domain eq $ENV{'user.domain'}) ) {
                    225: 	$myself=1;
                    226:     }
                    227:     my $vgr=&Apache::lonnet::allowed('vgr',$courseid);
                    228:     my $mgr=&Apache::lonnet::allowed('vgr',$courseid);
                    229:     if ($mgr) { return "M"; }
                    230:     if ($vgr) { return "V"; }
                    231:     if ($myself) { return "V"; }
                    232:     return '';
1.45      albertel  233: }
                    234: 
1.44      albertel  235: sub start_dataresponse {
1.73      albertel  236:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    237:     my $id = &Apache::response::start_response($parstack,$safeeval);
                    238:     my $result;
                    239:     if ($target eq 'web') {
                    240: 	$result = $token->[2]->{'display'}.':';
                    241:     } elsif ($target eq 'meta') {
                    242: 	$result = &Apache::response::meta_stores_write($token->[2]->{'name'},
                    243: 						       $token->[2]->{'type'},
                    244: 						       $token->[2]->{'display'});
                    245: 	$result .= &Apache::response::meta_package_write('dataresponse');
                    246:     }
                    247:     return $result;
1.44      albertel  248: }
                    249: 
                    250: sub end_dataresponse {
1.73      albertel  251:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    252:     my $result;
                    253:     if ( $target eq 'web' ) {
                    254:     } elsif ($target eq 'grade' ) {
                    255: 	if ( defined $ENV{'form.submitted'}) {
                    256: 	    my ($symb,$courseid,$domain,$name)=&Apache::lonxml::whichuser();
                    257: 	    my $allowed=&Apache::lonnet::allowed('mgr',$courseid);
                    258: 	    if ($allowed) {
                    259: 		&Apache::response::setup_params('dataresponse');
                    260: 		my $partid = $Apache::inputtags::part;
                    261: 		my $id = $Apache::inputtags::response['-1'];
                    262: 		my $response = $ENV{'form.HWVAL_'.$id};
                    263: 		my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
                    264: 		if ( $response =~ /[^\s]/) {
                    265: 		    $Apache::lonhomework::results{"resource.$partid.$id.$name"}=$response;
                    266: 		    $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
                    267: 		    $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}='SUBMITTED';
                    268: 		}
                    269: 	    } else {
                    270: 		$result='Not Permitted to change values.'
                    271: 	    }
1.45      albertel  272: 	}
1.73      albertel  273:     }
                    274:     &Apache::response::end_response;
                    275:     return $result;
1.3       albertel  276: }
                    277: 
                    278: sub start_responseparam {
1.73      albertel  279:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    280:     my $result='';
                    281:     if ($target eq 'meta') {
                    282: 	$result = &meta_parameter_write($token->[2]->{'name'},
                    283: 					$token->[2]->{'type'},
                    284: 					$token->[2]->{'default'},
                    285: 					$token->[2]->{'description'});
                    286:     } elsif ($target eq 'edit') {
                    287: 	$result.=&Apache::edit::tag_start($target,$token);
                    288: 	$result.=&Apache::edit::text_arg('Name:','name',$token).
                    289: 	    &Apache::edit::text_arg('Type:','type',$token).
                    290: 		&Apache::edit::text_arg('Description:','description',$token).
                    291: 		    &Apache::edit::text_arg('Default:','default',$token).
                    292: 			"</td></tr>";
                    293: 	$result.=&Apache::edit::end_table;
                    294:     } elsif ($target eq 'modified') {
                    295: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
                    296: 						     'name','type','description',
                    297: 						     'default');
                    298: 	if ($constructtag) {
                    299: 	    $result = &Apache::edit::rebuild_tag($token);
                    300: 	    $result.=&Apache::edit::handle_insert();
                    301: 	}
                    302:     } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
                    303: 	     $target eq 'tex' || $target eq 'analyze' ) {
                    304: 	if ($ENV{'request.state'} eq 'construct') {
                    305: 	    my $name   =&Apache::lonxml::get_param('name',$parstack,$safeeval);
                    306: 	    my $default=&Apache::lonxml::get_param('default',$parstack,
                    307: 						     $safeeval);
                    308: 	    if ($name) {$Apache::inputtags::params{$name}=$default;}
                    309: 	}
1.52      albertel  310:     }
1.73      albertel  311:     return $result;
1.3       albertel  312: }
                    313: 
                    314: sub end_responseparam {
1.73      albertel  315:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    316:     if ($target eq 'edit') { return ('','no'); }
                    317:     return '';
1.55      albertel  318: }
                    319: 
                    320: sub start_parameter {
1.73      albertel  321:     my $result = &start_responseparam(@_);
                    322:     return $result;
1.55      albertel  323: }
                    324: 
                    325: sub end_parameter {
1.73      albertel  326:     my $result = &end_responseparam(@_);
                    327:     return $result;
1.42      albertel  328: }
                    329: 
1.67      albertel  330: sub reset_params {
                    331:     %Apache::inputtags::params=();
                    332: }
                    333: 
1.42      albertel  334: sub setup_params {
1.73      albertel  335:     my ($tag) = @_;
1.42      albertel  336: 
1.73      albertel  337:     if ($ENV{'request.state'} eq 'construct') { return; }
                    338:     my %paramlist=();
                    339:     foreach my $key (keys(%Apache::lonnet::packagetab)) {
                    340: 	if ($key =~ /^$tag/) {
                    341: 	    my ($package,$name) = split(/&/,$key);
                    342: 	    $paramlist{$name}=1;
                    343: 	}
1.42      albertel  344:     }
1.73      albertel  345:     foreach my $key (keys(%paramlist)) {
                    346: 	my $entry= 'resource.'.$Apache::inputtags::part;
                    347: 	if (defined($Apache::inputtags::response[-1])) {
                    348: 	    $entry.='_'.$Apache::inputtags::response[-1];
                    349: 	}
                    350: 	$entry.='.'.$key;
                    351: 	&Apache::lonxml::debug("looking for $entry");
                    352: 	my $value = &Apache::lonnet::EXT("$entry");
                    353: 	&Apache::lonxml::debug("$key has value :$value:");
                    354: 	if ($value eq 'con_lost' || $value =~ /^error:/) {
                    355: 	    &Apache::lonxml::debug("using nothing");
                    356: 	    $Apache::inputtags::params{$key}='';
                    357: 	} else {
                    358: 	    &Apache::lonxml::debug("using value");
                    359: 	    $Apache::inputtags::params{$key}=$value;
                    360: 	}
1.42      albertel  361:     }
1.48      albertel  362: }
                    363: 
                    364: sub answer_header {
1.73      albertel  365:     my ($type) = @_;
                    366:     my $result;
1.77      albertel  367:     if ($ENV{'form.answer_output_mode'} eq 'tex') {
1.75      sakharuk  368: 	$result = ' \vskip 0 mm \begin{tabular}{|c|}\hline Answer for Part: '.
                    369:                   $Apache::inputtags::part.' \\\\ \hline ';
1.73      albertel  370:     } else {
1.80    ! albertel  371: 	$result = '<table border="1"><tr><td>Answer for Part:'.
        !           372: 	    $Apache::inputtags::part. '</td>'."\n";
1.73      albertel  373:     }
                    374:     return $result;
1.48      albertel  375: }
                    376: 
                    377: sub answer_part {
1.73      albertel  378:     my ($type,$answer) = @_;
                    379:     my $result;
1.77      albertel  380:     if ($ENV{'form.answer_output_mode'} eq 'tex') {
1.75      sakharuk  381: 	$result = ' '.$answer.'\\\\ \hline ';
1.73      albertel  382:     } else {
1.80    ! albertel  383: 	$result = '<td>'.$answer.'</td>';
1.73      albertel  384:     }
                    385:     return $result;
1.48      albertel  386: }
                    387: 
                    388: sub answer_footer {
1.73      albertel  389:     my ($type) = @_;
                    390:     my $result;
1.77      albertel  391:     if ($ENV{'form.answer_output_mode'} eq 'tex') {
1.75      sakharuk  392: 	$result = ' \end{tabular} \vskip 0 mm ';
1.73      albertel  393:     } else {
1.80    ! albertel  394: 	$result = '</tr></table>';
1.73      albertel  395:     }
                    396:     return $result;
1.1       albertel  397: }
1.2       albertel  398: 
1.62      albertel  399: sub showallfoils {
1.73      albertel  400:     my $return=0;
                    401:     if (defined($ENV{'form.showallfoils'}) &&
                    402: 	$ENV{'request.state'} eq 'construct') {
                    403: 	$return=1;
                    404:     }
                    405:     return $return;
1.70      albertel  406: }
                    407: 
                    408: sub getresponse {
                    409:     my ($temp)=@_;
                    410:     my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
                    411:     my $response;
                    412:     if (!defined($temp)) {
                    413: 	$temp=1;
                    414:     } else {
                    415: 	$formparm.=":$temp";
                    416:     }
                    417:     my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
                    418: 		    'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
                    419: 		    'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
                    420: 		    'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
                    421:     if ($ENV{'form.submitted'} eq 'scantron') {
1.71      albertel  422: 	my $part  = $Apache::inputtags::part;
                    423: 	my $id    = $Apache::inputtags::response[-1];
1.70      albertel  424: 	$response = $ENV{'scantron.'.($Apache::lonxml::counter+$temp-1).
                    425: 			 '.answer'};
1.71      albertel  426: 	# save bubbled letter for later
                    427: 	$Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
                    428: 	    $response;
1.70      albertel  429: 	$response = $let_to_num{$response};
                    430:     } else {
                    431: 	$response = $ENV{$formparm};
                    432:     }
                    433:     return $response;
1.62      albertel  434: }
1.71      albertel  435: 
                    436: sub repetition {
                    437:     my $id = $Apache::inputtags::part;
                    438:     my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                    439:     my $repetition = int $weight/9;
                    440:     if ($weight % 9 != 0) {$repetition++;} 
1.72      albertel  441:     return $repetition;
                    442: }
                    443: 
                    444: sub scored_response {
                    445:     my ($part,$id)=@_;
                    446:     my $repetition=&repetition();
                    447:     my $score=0;
                    448:     for (my $i=0;$i<$repetition;$i++) {
                    449: 	my $increase=&Apache::response::getresponse($i+1);
                    450: 	if ($increase ne '') { $score+=$increase+1; }
                    451:     }
                    452:     my $weight = &Apache::lonnet::EXT("resource.$part.weight");
                    453:     my $pcr=$score/$weight;
                    454:     $Apache::lonhomework::results{"resource.$part.$id.awarded"}=$pcr;
                    455:     $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
                    456: 	'ASSIGNED_SCORE';
1.71      albertel  457:     return $repetition;
1.78      albertel  458: }
                    459: 
                    460: sub whichorder {
                    461:     my ($max,$randomize,$showall,$hash)=@_;
                    462:     #&Apache::lonxml::debug("man $max randomize $randomize");
                    463:     if (!defined(@{ $$hash{'names'} })) { return; }
                    464:     my @names = @{ $$hash{'names'} };
                    465:     my @whichopt =();
                    466:     my (%top,@toplist,%bottom,@bottomlist);
                    467:     if (!($showall || ($randomize eq 'no'))) {
                    468: 	my $current=0;
                    469: 	foreach my $name (@names) {
                    470: 	    $current++;
                    471: 	    if ($$hash{"$name.location"} eq 'top') {
                    472: 		$top{$name}=$current;
                    473: 	    } elsif ($$hash{"$name.location"} eq 'bottom') {
                    474: 		$bottom{$name}=$current;
                    475: 	    }
                    476: 	}
                    477:     }
                    478:     my $topcount=0;
                    479:     my $bottomcount=0;
                    480:     while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall)
                    481: 	   && ($#names > -1)) {
                    482: 	#&Apache::lonxml::debug("Have $#whichopt max is $max");
                    483: 	my $aopt;
                    484: 	if ($showall || ($randomize eq 'no')) {
                    485: 	    $aopt=0;
                    486: 	} else {
                    487: 	    $aopt=int(&Math::Random::random_uniform() * ($#names+1));
                    488: 	}
                    489: 	#&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
                    490: 	$aopt=splice(@names,$aopt,1);
                    491: 	#&Apache::lonxml::debug("Picked $aopt");
                    492: 	if ($top{$aopt}) {
                    493: 	    $toplist[$top{$aopt}]=$aopt;
                    494: 	    $topcount++;
                    495: 	} elsif ($bottom{$aopt}) {
                    496: 	    $bottomlist[$bottom{$aopt}]=$aopt;
                    497: 	    $bottomcount++;
                    498: 	} else {
                    499: 	    push (@whichopt,$aopt);
                    500: 	}
                    501:     }
                    502:     for (my $i=0;$i<=$#toplist;$i++) {
                    503: 	if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
                    504:     }
                    505:     for (my $i=0;$i<=$#bottomlist;$i++) {
                    506: 	if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
                    507:     }
                    508: 
                    509:     return @whichopt;
1.71      albertel  510: }
                    511: 
1.1       albertel  512: 1;
                    513: __END__
1.38      albertel  514:  

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