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Up to [LON-CAPA] / loncom / homework

- BUG# 2331, homework can be done in 'sequential' mode now, Only show part 2 once part 1 is correct, or unanswerable (tries exhausted)
- added new function &check_status($partid) to check the current status of a part

    1: # The LearningOnline Network with CAPA
    2: # various response type definitons response definition
    3: #
    4: # $Id: response.pm,v 1.117 2005/04/01 18:08:14 albertel Exp $
    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: #
   28: 
   29: package Apache::response;
   30: use strict;
   31: use Apache::lonlocal;
   32: 
   33: BEGIN {
   34:     &Apache::lonxml::register('Apache::response',('responseparam','parameter','dataresponse'));
   35: }
   36: 
   37: sub start_response {
   38:     my ($parstack,$safeeval)=@_;
   39:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
   40:     if ($id eq '') { $id = $Apache::lonxml::curdepth; }
   41:     if ($#Apache::inputtags::import > -1) {
   42: 	&Apache::lonxml::debug("Turning :$id: into");
   43: 	$id = join('_',@Apache::inputtags::import).'_'.$id;
   44: 	&Apache::lonxml::debug("New  :$id:");
   45:     }
   46:     push (@Apache::inputtags::response,$id);
   47:     push (@Apache::inputtags::responselist,$id);
   48:     @Apache::inputtags::inputlist=();
   49:     if ($Apache::inputtags::part eq '' && 
   50: 	!$Apache::lonhomework::ignore_response_errors) {
   51: 	&Apache::lonxml::error(&HTML::Entities::encode(&mt("Found a <*response> outside of a <part> in a <part>ed problem"),'<>&"'));
   52:     }
   53:     if ($Apache::inputtags::response_with_no_part &&
   54: 	$Apache::inputtags::part ne '0') {
   55: 	&Apache::lonxml::error(&HTML::Entities::encode(&mt("<*response>s are both inside of <part> and outside of <part>, this is not a valid problem, errors in grading may occur."),'<>&"').'<br />');
   56:     }
   57:     if ($Apache::inputtags::part eq '0') {
   58: 	$Apache::inputtags::response_with_no_part=1;
   59:     }
   60:     return $id;
   61: }
   62: 
   63: sub end_response {
   64:     #pop @Apache::inputtags::response;
   65:     @Apache::inputtags::inputlist=();
   66:     return '';
   67: }
   68: 
   69: sub start_hintresponse {
   70:     my ($parstack,$safeeval)=@_;
   71:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
   72:     if ($id eq '') { $id = $Apache::lonxml::curdepth; }
   73:     push (@Apache::inputtags::response,$id);
   74:     push (@Apache::inputtags::responselist,$id);
   75:     push (@Apache::inputtags::paramstack,[%Apache::inputtags::params]);
   76:     return $id;
   77: }
   78: 
   79: sub end_hintresponse {
   80:     pop @Apache::inputtags::response;
   81:     if (defined($Apache::inputtags::paramstack[-1])) {
   82: 	%Apache::inputtags::params=
   83: 	    @{ pop(@Apache::inputtags::paramstack) };
   84:     }
   85:     return '';
   86: }
   87: 
   88: my @randomseeds;
   89: sub pushrandomnumber {
   90:     my $rand_alg=&Apache::lonnet::get_rand_alg();
   91:     if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
   92: 	$rand_alg eq '64bit2') {
   93: 	# do nothing
   94:     } else {
   95: 	my @seed=&Math::Random::random_get_seed();
   96: 	push (@randomseeds,\@seed);
   97:     }
   98:     &Apache::response::setrandomnumber();
   99: }
  100: sub poprandomnumber {
  101:     my $rand_alg=&Apache::lonnet::get_rand_alg();
  102:     if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
  103: 	$rand_alg eq '64bit2') {
  104: 	return;
  105:     }
  106:     my $seed=pop(@randomseeds);
  107:     if ($seed) {
  108: 	&Math::Random::random_set_seed(@$seed);
  109:     } else {
  110: 	&Apache::lonxml::error("Unable to restore random algorithm.");
  111:     }
  112: }
  113: 
  114: sub setrandomnumber {
  115:     my $rndseed;
  116:     $rndseed=&Apache::structuretags::setup_rndseed();
  117:     if (!defined($rndseed)) { $rndseed=&Apache::lonnet::rndseed(); }
  118:     &Apache::lonxml::debug("randseed $rndseed");
  119:     #  $rndseed=unpack("%32i",$rndseed);
  120:     my $rand_alg=&Apache::lonnet::get_rand_alg();
  121:     my $rndmod;
  122:     if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
  123: 	$rand_alg eq '64bit2') {
  124: 	$rndmod=(&Apache::lonnet::numval($Apache::inputtags::part) << 10);
  125: 	if (defined($Apache::inputtags::response[-1])) {
  126: 	    $rndmod+=&Apache::lonnet::numval($Apache::inputtags::response[-1]);
  127: 	}
  128:     } elsif ($rand_alg eq '64bit3') {
  129: 	$rndmod=(&Apache::lonnet::numval2($Apache::inputtags::part) << 10);
  130: 	if (defined($Apache::inputtags::response[-1])) {
  131: 	    $rndmod+=&Apache::lonnet::numval2($Apache::inputtags::response[-1]);
  132: 	}
  133:     } else {
  134: 	my $shift=(4*scalar(@Apache::inputtags::responselist))%30;
  135: 	$rndmod=(&Apache::lonnet::numval3($Apache::inputtags::part) << (($shift+15)%30));
  136: 	if (defined($Apache::inputtags::response[-1])) {
  137: 	    $rndmod+=(&Apache::lonnet::numval3($Apache::inputtags::response[-1]) << $shift );
  138: 	}
  139:     }
  140:     if ($rndseed =~/([,:])/) {
  141: 	my $char=$1;
  142: 	use integer;
  143: 	my ($num1,$num2)=split(/\Q$char\E/,$rndseed);
  144: 	$num1+=$rndmod;
  145: 	$num2+=$rndmod;
  146: 	if($Apache::lonnet::_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
  147: 	$rndseed=$num1.$char.$num2;
  148:     } else {
  149: 	$rndseed+=$rndmod;
  150: 	if($Apache::lonnet::_64bit) {
  151: 	    use integer;
  152: 	    $rndseed=(($rndseed<<32)>>32);
  153: 	}
  154:     }
  155:     &Apache::lonxml::debug("randseed $rndmod $rndseed");
  156:     &Apache::lonnet::setup_random_from_rndseed($rndseed);
  157:     return '';
  158: }
  159: 
  160: sub meta_parameter_write {
  161:     my ($name,$type,$default,$display)=@_;
  162:     my $partref=$Apache::inputtags::part;
  163:     my $result='<parameter part="'.$Apache::inputtags::part.'"';
  164:     if (defined($Apache::inputtags::response[-1])) {
  165: 	$result.=            ' id="'.$Apache::inputtags::response[-1].'"';
  166: 	$partref.='_'.$Apache::inputtags::response[-1];
  167:     }
  168:     $result.=            ' name="'.$name.'"'.
  169:                          ' type="'.$type.'"'.
  170: (defined($default)?' default="'.$default.'"':'').
  171: (defined($display)?' display="'.$display.' [Part: '.$partref.']"':'')
  172:              .'></parameter>'
  173:              ."\n";
  174:     return $result;
  175: }
  176: 
  177: sub meta_package_write {
  178:     my $name=shift;
  179:     my $result = '<parameter part="'.$Apache::inputtags::part.'"';
  180:     if(defined($Apache::inputtags::response[-1])) {
  181: 	$result.= ' id="'.$Apache::inputtags::response[-1].'"';
  182:     }
  183:     $result.=' package="'.$name.'"></parameter>'."\n";
  184:     return $result;
  185: }
  186: 
  187: sub meta_stores_write {
  188:     my ($name,$type,$display)=@_;
  189:     my $partref=$Apache::inputtags::part;
  190:     my $result = '<stores part="'.$Apache::inputtags::part.'"';
  191:     if (defined($Apache::inputtags::response[-1])) {
  192: 	$result.=           ' id="'.$Apache::inputtags::response[-1].'"';
  193: 	$partref.='_'.$Apache::inputtags::response[-1];
  194:     }	
  195:     $result.=          ' name="'.$name.'"'.
  196:                        ' type="'.$type.'"'.
  197: 	            ' display="'.$display.' [Part: '.$partref.']"'.
  198: 		      "></stores>\n";
  199: }
  200: 
  201: sub mandatory_part_meta {
  202: #
  203: # Autogenerate metadata for mandatory
  204: # input (from RAT or lonparmset) and 
  205: # output (to lonspreadsheet)
  206: # of each part
  207: #
  208:     return
  209: #    &meta_parameter_write('opendate','date_start','',
  210: #                          'Opening Date').
  211: #    &meta_parameter_write('duedate','date_end','',
  212: #                          'Due Date').
  213: #    &meta_parameter_write('answerdate','date_start','',
  214: #                          'Show Answer Date').
  215: #    &meta_parameter_write('weight','int_zeropos','',
  216: #                          'Available Points').
  217: #    &meta_parameter_write('maxtries','int_pos','',
  218: #                          'Maximum Number of Tries').
  219: 	&meta_package_write('part').
  220:         &meta_stores_write('solved','string',
  221: 			   'Problem Status').
  222:         &meta_stores_write('tries','int_zeropos',
  223: 			   'Number of Attempts').
  224:         &meta_stores_write('awarded','float',
  225: 			   'Partial Credit Factor');
  226: #
  227: # Note: responseid-specific data 'submission' and 'awarddetail'
  228: # not available to spreadsheet -> skip here
  229: #
  230: }
  231: 
  232: sub meta_part_order {
  233:     if (@Apache::inputtags::partlist) {
  234: 	my @parts=@Apache::inputtags::partlist;
  235: 	shift(@parts);
  236: 	return '<partorder>'.join(',',@parts).'</partorder>'."\n";
  237:     } else {
  238: 	return '<partorder>0</partorder>'."\n";
  239:     }
  240: }
  241: 
  242: sub meta_response_order {
  243:     if (@Apache::inputtags::responselist) {
  244: 	return '<responseorder>'.join(',',@Apache::inputtags::responselist).
  245: 	    '</responseorder>'."\n";
  246:     }
  247: }
  248: 
  249: sub check_for_previous {
  250:     my ($curresponse,$partid,$id) = @_;
  251:     my %previous;
  252:     $previous{'used'} = 0;
  253:     foreach my $key (sort(keys(%Apache::lonhomework::history))) {
  254: 	if ($key =~ /resource\.$partid\.$id\.submission$/) {
  255: 	    &Apache::lonxml::debug("Trying $key");
  256: 	    my $pastresponse=$Apache::lonhomework::history{$key};
  257: 	    if ($pastresponse eq $curresponse) {
  258: 		$previous{'used'} = 1;
  259: 		my $history;
  260: 		if ( $key =~ /^(\d+):/ ) {
  261: 		    $history=$1;
  262: 		    $previous{'award'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
  263: 		    $previous{'last'}='0';
  264: 		    push(@{ $previous{'version'} },$history);
  265: 		} else {
  266: 		    $previous{'award'} = $Apache::lonhomework::history{"resource.$partid.$id.awarddetail"};
  267: 		    $previous{'last'}='1';
  268: 		}
  269: 		if (! $previous{'award'} ) { $previous{'award'} = 'UNKNOWN';	}
  270: 		&Apache::lonxml::debug("got a match :$previous{'award'}:$previous{'used'}:");
  271: 	    }
  272: 	}
  273:     }
  274:     &Apache::lonhomework::showhash(%previous);
  275:     return %previous;
  276: }
  277: 
  278: sub handle_previous {
  279:     my ($previous,$ad)=@_;
  280:     if ($$previous{'used'} && ($$previous{'award'} eq $ad) ) {
  281: 	if ($$previous{'last'}) {
  282: 	    push(@Apache::inputtags::previous,'PREVIOUSLY_LAST');
  283: 	    push(@Apache::inputtags::previous_version,$$previous{'version'});
  284: 	} elsif ($Apache::lonhomework::type ne 'survey') {
  285: 	    push(@Apache::inputtags::previous,'PREVIOUSLY_USED');
  286: 	    push(@Apache::inputtags::previous_version,$$previous{'version'});
  287: 	}
  288:     }
  289: }
  290: 
  291: sub view_or_modify {
  292:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
  293:     my $myself=0;
  294:     if ( ($name eq $ENV{'user.name'}) && ($domain eq $ENV{'user.domain'}) ) {
  295: 	$myself=1;
  296:     }
  297:     my $vgr=&Apache::lonnet::allowed('vgr',$courseid);
  298:     my $mgr=&Apache::lonnet::allowed('vgr',$courseid);
  299:     if ($mgr) { return "M"; }
  300:     if ($vgr) { return "V"; }
  301:     if ($myself) { return "V"; }
  302:     return '';
  303: }
  304: 
  305: sub start_dataresponse {
  306:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  307:     my $id = &Apache::response::start_response($parstack,$safeeval);
  308:     my $result;
  309:     if ($target eq 'web') {
  310: 	$result = $token->[2]->{'display'}.':';
  311:     } elsif ($target eq 'meta') {
  312: 	$result = &Apache::response::meta_stores_write($token->[2]->{'name'},
  313: 						       $token->[2]->{'type'},
  314: 						       $token->[2]->{'display'});
  315: 	$result .= &Apache::response::meta_package_write('dataresponse');
  316:     }
  317:     return $result;
  318: }
  319: 
  320: sub end_dataresponse {
  321:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  322:     my $result;
  323:     if ( $target eq 'web' ) {
  324:     } elsif ($target eq 'grade' ) {
  325: 	if ( defined $ENV{'form.submitted'}) {
  326: 	    my ($symb,$courseid,$domain,$name)=&Apache::lonxml::whichuser();
  327: 	    my $allowed=&Apache::lonnet::allowed('mgr',$courseid);
  328: 	    if ($allowed) {
  329: 		&Apache::response::setup_params('dataresponse',$safeeval);
  330: 		my $partid = $Apache::inputtags::part;
  331: 		my $id = $Apache::inputtags::response['-1'];
  332: 		my $response = $ENV{'form.HWVAL_'.$id};
  333: 		my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
  334: 		if ( $response =~ /[^\s]/) {
  335: 		    $Apache::lonhomework::results{"resource.$partid.$id.$name"}=$response;
  336: 		    $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
  337: 		    $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}='SUBMITTED';
  338: 		}
  339: 	    } else {
  340: 		$result='Not Permitted to change values.'
  341: 	    }
  342: 	}
  343:     }
  344:     &Apache::response::end_response;
  345:     return $result;
  346: }
  347: 
  348: sub decide_package {
  349:     my ($tagstack)=@_;
  350:     my $package;
  351:     if ($$tagstack[-1] eq 'parameter') {
  352: 	$package='part';
  353:     } else {
  354: 	my $i=-1;
  355: 	while (defined($$tagstack[$i])) {
  356: 	    if ($$tagstack[$i] =~ /(response|hint)$/) {
  357: 		$package=$$tagstack[$i];
  358: 		last;
  359: 	    }
  360: 	    $i--;
  361: 	}
  362:     }
  363:     return $package;
  364: }
  365: 
  366: sub start_responseparam {
  367:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  368:     my $result='';
  369:     if ($target eq 'meta') {
  370: 	$result = &meta_parameter_write($token->[2]->{'name'},
  371: 					$token->[2]->{'type'},
  372: 					$token->[2]->{'default'},
  373: 					$token->[2]->{'description'});
  374:     } elsif ($target eq 'edit') {
  375: 	$result.=&Apache::edit::tag_start($target,$token);
  376: 	my $optionlist;
  377: 	my $package=&decide_package($tagstack);
  378: 	foreach my $key (sort(keys(%Apache::lonnet::packagetab))) {
  379: 	    if ($key =~ /^\Q$package\E&(.*)&display$/) {
  380: 		$optionlist.='<option value="'.$1.'">'.
  381: 		    $Apache::lonnet::packagetab{$key}.'</option>';
  382: 	    }
  383: 	}
  384: 	if (defined($optionlist)) {
  385: 	    $result.='Use template: <select name="'.
  386: 		&Apache::edit::html_element_name('parameter_package').'">'.
  387: 		    '<option value=""></option>'.$optionlist.'</select><br />';
  388: 	}
  389: 	$result.=&Apache::edit::text_arg('Name:','name',$token).
  390: 	    &Apache::edit::text_arg('Type:','type',$token).
  391: 		&Apache::edit::text_arg('Description:','description',$token).
  392: 		    &Apache::edit::text_arg('Default:','default',$token).
  393: 			"</td></tr>";
  394: 	$result.=&Apache::edit::end_table;
  395:     } elsif ($target eq 'modified') {
  396: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
  397: 						     $safeeval,'name','type',
  398: 						     'description','default');
  399: 	my $element=&Apache::edit::html_element_name('parameter_package');
  400: 	if (defined($ENV{"form.$element"}) && $ENV{"form.$element"} ne '') {
  401: 	    my $name=$ENV{"form.$element"};
  402: 	    my $tag=&decide_package($tagstack);
  403: 	    $token->[2]->{'name'}=$name;
  404: 	    $token->[2]->{'type'}=
  405: 		$Apache::lonnet::packagetab{"$tag&$name&type"};
  406: 	    $token->[2]->{'description'}=
  407: 		$Apache::lonnet::packagetab{"$tag&$name&display"};
  408: 	    $token->[2]->{'default'}=
  409: 		$Apache::lonnet::packagetab{"$tag&$name&default"};
  410: 	    $constructtag=1;
  411: 	}
  412: 	if ($constructtag) {
  413: 	    $result = &Apache::edit::rebuild_tag($token);
  414: 	    $result.=&Apache::edit::handle_insert();
  415: 	}
  416:     } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
  417: 	     $target eq 'tex' || $target eq 'analyze' ) {
  418: 	if ($ENV{'request.state'} eq 'construct') {
  419: 	    my $name   =&Apache::lonxml::get_param('name',$parstack,$safeeval);
  420: 	    my $default=&Apache::lonxml::get_param('default',$parstack,
  421: 						     $safeeval);
  422: 	    if ($name) {$Apache::inputtags::params{$name}=$default;}
  423: 	}
  424:     }
  425:     return $result;
  426: }
  427: 
  428: sub end_responseparam {
  429:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  430:     if ($target eq 'edit') { return ('','no'); }
  431:     return '';
  432: }
  433: 
  434: sub start_parameter {
  435:     return &start_responseparam(@_);
  436: }
  437: 
  438: sub end_parameter {
  439:     return &end_responseparam(@_);
  440: }
  441: 
  442: sub reset_params {
  443:     %Apache::inputtags::params=();
  444: }
  445: 
  446: sub setup_params {
  447:     my ($tag,$safeeval) = @_;
  448: 
  449:     if ($ENV{'request.state'} eq 'construct') { return; }
  450:     my %paramlist=();
  451:     foreach my $key (keys(%Apache::lonnet::packagetab)) {
  452: 	if ($key =~ /^$tag/) {
  453: 	    my ($package,$name) = split(/&/,$key);
  454: 	    $paramlist{$name}=1;
  455: 	}
  456:     }
  457:     foreach my $key (keys(%paramlist)) {
  458: 	my $entry= 'resource.'.$Apache::inputtags::part;
  459: 	if (defined($Apache::inputtags::response[-1])) {
  460: 	    $entry.='_'.$Apache::inputtags::response[-1];
  461: 	}
  462: 	$entry.='.'.$key;
  463: 	&Apache::lonxml::debug("looking for $entry");
  464: 	my $value = &Apache::lonnet::EXT("$entry");
  465: 	&Apache::lonxml::debug("$key has value :$value:");
  466: 	if ($value eq 'con_lost' || $value =~ /^error:/) {
  467: 	    &Apache::lonxml::debug("using nothing");
  468: 	    $Apache::inputtags::params{$key}='';
  469: 	} else {
  470: 	    my $string="{return qq\0".$value."\0}";
  471: 	    my $newvalue=&Apache::run::run($string,$safeeval,1);
  472: 	    if (defined($newvalue)) { $value=$newvalue; }
  473: 	    $Apache::inputtags::params{$key}=$value;
  474: 	}
  475:     }
  476: }
  477: 
  478: sub answer_header {
  479:     my ($type) = @_;
  480:     my $result;
  481:     if ($ENV{'form.answer_output_mode'} eq 'tex') {
  482: 	$result = ' \vskip 0 mm \begin{tabular}{|c|}\hline Answer for Part: \verb|'.
  483:                   $Apache::inputtags::part.'| \\\\ \hline ';
  484:     } else {
  485: 	$result = '<table border="1"><tr><td>Answer for Part:'.
  486: 	    $Apache::inputtags::part. '</td>'."\n";
  487:     }
  488:     return $result;
  489: }
  490: 
  491: sub answer_part {
  492:     my ($type,$answer) = @_;
  493:     my $result;
  494:     if ($ENV{'form.answer_output_mode'} eq 'tex') {
  495: 	$result = ' \verb|'.$answer.'|\\\\ \hline ';
  496:     } else {
  497: 	$result = '<td>'.$answer.'</td>';
  498:     }
  499:     return $result;
  500: }
  501: 
  502: sub answer_footer {
  503:     my ($type) = @_;
  504:     my $result;
  505:     if ($ENV{'form.answer_output_mode'} eq 'tex') {
  506: 	$result = ' \end{tabular} \vskip 0 mm ';
  507:     } else {
  508: 	$result = '</tr></table>';
  509:     }
  510:     return $result;
  511: }
  512: 
  513: sub showallfoils {
  514:     if (defined($ENV{'form.showallfoils'})) {
  515: 	my ($symb)=&Apache::lonxml::whichuser();
  516: 	if ($ENV{'request.state'} eq 'construct' || 
  517: 	    $ENV{'user.adv'} ) {
  518: 	    return 1;
  519: 	}
  520:     }
  521:     if ($Apache::lonhomework::type eq 'survey') { return 1; }
  522:     return 0;
  523: }
  524: 
  525: sub getresponse {
  526:     my ($temp,$resulttype)=@_;
  527:     my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
  528:     my $response;
  529:     if (!defined($temp)) {
  530: 	$temp=1;
  531:     } else {
  532: 	$formparm.=":$temp";
  533:     }
  534:     my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
  535: 		    'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
  536: 		    'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
  537: 		    'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
  538:     if ($ENV{'form.submitted'} eq 'scantron') {
  539: 	my $part  = $Apache::inputtags::part;
  540: 	my $id    = $Apache::inputtags::response[-1];
  541: 	$response = $ENV{'scantron.'.($Apache::lonxml::counter+$temp-1).
  542: 			 '.answer'};
  543: 	# save bubbled letter for later
  544: 	$Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
  545: 	    $response;
  546: 	if ($resulttype ne 'letter') {
  547: 	    if ($resulttype eq 'A is 1') {
  548: 		$response = $let_to_num{$response}+1;
  549: 	    } else {
  550: 		$response = $let_to_num{$response};
  551: 	    }
  552: 	}
  553:     } else {
  554: 	$response = $ENV{$formparm};
  555:     }
  556:     return $response;
  557: }
  558: 
  559: sub repetition {
  560:     my $id = $Apache::inputtags::part;
  561:     my $weight = &Apache::lonnet::EXT("resource.$id.weight");
  562:     my $repetition = int $weight/9;
  563:     if ($weight % 9 != 0) {$repetition++;} 
  564:     return $repetition;
  565: }
  566: 
  567: sub scored_response {
  568:     my ($part,$id)=@_;
  569:     my $repetition=&repetition();
  570:     my $score=0;
  571:     for (my $i=0;$i<$repetition;$i++) {
  572: 	my $increase=&Apache::response::getresponse($i+1);
  573: 	if ($increase ne '') { $score+=$increase+1; }
  574:     }
  575:     my $weight = &Apache::lonnet::EXT("resource.$part.weight");
  576:     if (!defined($weight) || $weight eq '' || $weight eq 0) { $weight = 1; }
  577:     my $pcr=$score/$weight;
  578:     $Apache::lonhomework::results{"resource.$part.$id.awarded"}=$pcr;
  579:     $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
  580: 	'ASSIGNED_SCORE';
  581:     return $repetition;
  582: }
  583: 
  584: sub whichorder {
  585:     my ($max,$randomize,$showall,$hash)=@_;
  586:     #&Apache::lonxml::debug("man $max randomize $randomize");
  587:     if (!defined(@{ $$hash{'names'} })) { return; }
  588:     my @names = @{ $$hash{'names'} };
  589:     my @whichopt =();
  590:     my (%top,@toplist,%bottom,@bottomlist);
  591:     if (!($showall || ($randomize eq 'no'))) {
  592: 	my $current=0;
  593: 	foreach my $name (@names) {
  594: 	    $current++;
  595: 	    if ($$hash{"$name.location"} eq 'top') {
  596: 		$top{$name}=$current;
  597: 	    } elsif ($$hash{"$name.location"} eq 'bottom') {
  598: 		$bottom{$name}=$current;
  599: 	    }
  600: 	}
  601:     }
  602:     my $topcount=0;
  603:     my $bottomcount=0;
  604:     while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall)
  605: 	   && ($#names > -1)) {
  606: 	#&Apache::lonxml::debug("Have $#whichopt max is $max");
  607: 	my $aopt;
  608: 	if ($showall || ($randomize eq 'no')) {
  609: 	    $aopt=0;
  610: 	} else {
  611: 	    $aopt=int(&Math::Random::random_uniform() * ($#names+1));
  612: 	}
  613: 	#&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
  614: 	$aopt=splice(@names,$aopt,1);
  615: 	#&Apache::lonxml::debug("Picked $aopt");
  616: 	if ($top{$aopt}) {
  617: 	    $toplist[$top{$aopt}]=$aopt;
  618: 	    $topcount++;
  619: 	} elsif ($bottom{$aopt}) {
  620: 	    $bottomlist[$bottom{$aopt}]=$aopt;
  621: 	    $bottomcount++;
  622: 	} else {
  623: 	    push (@whichopt,$aopt);
  624: 	}
  625:     }
  626:     for (my $i=0;$i<=$#toplist;$i++) {
  627: 	if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
  628:     }
  629:     for (my $i=0;$i<=$#bottomlist;$i++) {
  630: 	if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
  631:     }
  632:     return @whichopt;
  633: }
  634: 
  635: sub show_answer {
  636:     my $part   = $Apache::inputtags::part;
  637:     my $award  = $Apache::lonhomework::history{"resource.$part.solved"};
  638:     my $status = $Apache::inputtags::status[-1];
  639:     return  ( ($award =~ /^correct/
  640: 	       && lc($Apache::lonhomework::problemstatus) ne 'no')
  641: 	      || $status eq "SHOW_ANSWER");
  642: }
  643: 
  644: sub analyze_store_foilgroup {
  645:     my ($shown,$attrs)=@_;
  646:     my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
  647:     foreach my $name (@{ $Apache::response::foilgroup{'names'} }) {
  648: 	if (defined($Apache::lonhomework::analyze{"$part_id.foil.value.$name"})) { next; }
  649: 	push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },$name);
  650: 	foreach my $attr (@$attrs) {
  651: 	    $Apache::lonhomework::analyze{"$part_id.foil.".$attr.".$name"} =
  652: 		$Apache::response::foilgroup{"$name.".$attr};
  653: 	}
  654:     }
  655:     push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} }, @{ $shown });
  656: }
  657: 
  658: sub check_if_computed {
  659:     my ($token,$parstack,$safeeval,$name)=@_;
  660:     my $value = &Apache::lonxml::get_param($name,$parstack,$safeeval);
  661:     if (ref($token->[2]) eq 'HASH' && $value ne $token->[2]{$name}) {
  662: 	my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
  663: 	$Apache::lonhomework::analyze{"$part_id.answercomputed"} = 1;
  664:     }
  665: }
  666: 
  667: sub pick_foil_for_concept {
  668:     my ($target,$attrs,$hinthash,$parstack,$safeeval)=@_;
  669:     if (not defined(@{ $Apache::response::conceptgroup{'names'} })) { return; }
  670:     my @names = @{ $Apache::response::conceptgroup{'names'} };
  671:     my $pick=int(&Math::Random::random_uniform() * ($#names+1));
  672:     my $name=$names[$pick];
  673:     push @{ $Apache::response::foilgroup{'names'} }, $name;
  674:     foreach my $attr (@$attrs) {
  675: 	$Apache::response::foilgroup{"$name.".$attr} =
  676: 	    $Apache::response::conceptgroup{"$name.".$attr};
  677:     }
  678:     my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
  679:     $Apache::response::foilgroup{"$name.concept"} = $concept;
  680:     &Apache::lonxml::debug("Selecting $name in $concept");
  681:     my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
  682:     if ($target eq 'analyze') {
  683: 	push (@{ $Apache::lonhomework::analyze{"$part_id.concepts"} },
  684: 	      $concept);
  685: 	$Apache::lonhomework::analyze{"$part_id.concept.$concept"}=
  686: 	    $Apache::response::conceptgroup{'names'};
  687: 	foreach my $name (@{ $Apache::response::conceptgroup{'names'} }) {
  688: 	    push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },
  689: 		  $name);
  690: 	    foreach my $attr (@$attrs) {
  691: 		$Apache::lonhomework::analyze{"$part_id.foil.$attr.$name"}=
  692: 		    $Apache::response::conceptgroup{"$name.$attr"};
  693: 	    }
  694: 	}
  695:     }
  696:     push(@{ $hinthash->{"$part_id.concepts"} },$concept);
  697:     $hinthash->{"$part_id.concept.$concept"}=
  698: 	$Apache::response::conceptgroup{'names'};
  699: 
  700: }
  701: 
  702: sub get_response_param {
  703:     my ($id,$name,$default)=@_;
  704:     my $parameter;
  705:     if ($ENV{'request.state'} eq 'construct' &&
  706: 	defined($Apache::inputtags::params{$name})) {
  707: 	$parameter=$Apache::inputtags::params{$name};
  708:     } else {
  709: 	$parameter=&Apache::lonnet::EXT("resource.$id.$name");
  710:     }
  711:     if (!defined($parameter) ||	$parameter eq '') {
  712: 	$parameter = $default;
  713:     }
  714:     return $parameter;
  715: }
  716: 
  717: sub submitted {
  718:     my ($who)=@_;
  719:     
  720:     # when scatron grading any submission is a submission
  721:     if ($ENV{'form.submitted'} eq 'scantron') { return 1; }
  722:     # if the caller only cared if this was a scantron submission
  723:     if ($who eq 'scantron') { return 0; }
  724:     # if the Submit Answer button for this particular part was pressed
  725:     my $partid=$Apache::inputtags::part;
  726:     if (defined($ENV{'form.submit_'.$partid})) { return 1; }
  727:     # otherwise no submission occured
  728:     return 0;
  729: }
  730: 
  731: # basically undef and 0 (both false) mean that they still have work to do
  732: # and all true values mean that they can't do any more work
  733: #
  734: # a return of undef means it is unattempted
  735: # a return of 0 means it is attmpted and wrong but still has tries
  736: # a return of 1 means it is marked correct
  737: # a return of 2 means they have exceed maximum number of tries
  738: # a return of 3 means it after the answer date
  739: sub check_status {
  740:     my ($id)=@_;
  741:     if (!$id) {	$id=$Apache::linputtags::part; }
  742:     my $curtime=&Apache::lonnet::EXT('system.time');
  743:     my $opendate=&Apache::lonnet::EXT("resource.$id.opendate");
  744:     my $duedate=&Apache::lonnet::EXT("resource.$id.duedate");
  745:     my $answerdate=&Apache::lonnet::EXT("resource.$id.answerdate");
  746:     if ( $opendate && $curtime > $opendate &&
  747:          $duedate && $curtime > $duedate &&
  748:          $answerdate && $curtime > $answerdate) {
  749:         return 3;
  750:     }
  751:     my $status=&Apache::lonnet::EXT("user.resource.resource.$id.solved");
  752:     if ($status =~ /^correct/) { return 1; }
  753:     if (!$status) { return undef; }
  754:     my $maxtries=&Apache::lonnet::EXT("resource.$id.maxtries");
  755:     if ($maxtries eq '') { $maxtries=2; }
  756:     my $curtries=&Apache::lonnet::EXT("user.resource.resource.$id.tries");
  757:     if ($curtries < $maxtries) { return 0; }
  758:     return 2;
  759: }
  760: 
  761: 1;
  762: __END__
  763: