Annotation of loncom/homework/response.pm, revision 1.232

1.38      albertel    1: # The LearningOnline Network with CAPA
1.1       albertel    2: # various response type definitons response definition
1.53      albertel    3: #
1.232   ! raeburn     4: # $Id: response.pm,v 1.231 2012/10/12 12:45:46 raeburn 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: #
1.5       www        28: 
1.208     jms        29: =pod
                     30: 
                     31: =head1 NAME
                     32: 
1.218     raeburn    33: Apache::response.pm
1.208     jms        34: 
                     35: =head1 SYNOPSIS
                     36: 
                     37: This is part of the LearningOnline Network with CAPA project
                     38: described at http://www.lon-capa.org.
                     39: 
                     40: 
                     41: =head1 NOTABLE SUBROUTINES
                     42: 
                     43: =over
                     44: 
                     45: =item 
                     46: 
                     47: =back
                     48: 
                     49: =cut
                     50: 
                     51: 
1.1       albertel   52: package Apache::response;
                     53: use strict;
1.93      albertel   54: use Apache::lonlocal;
1.120     albertel   55: use Apache::lonnet;
1.228     raeburn    56: use Apache::inputtags();
1.153     www        57: use Apache::lonmaxima();
1.214     www        58: use Apache::lonr();
1.1       albertel   59: 
1.57      harris41   60: BEGIN {
1.139     www        61:     &Apache::lonxml::register('Apache::response',('responseparam','parameter','dataresponse','customresponse','mathresponse'));
1.1       albertel   62: }
                     63: 
1.13      albertel   64: sub start_response {
1.73      albertel   65:     my ($parstack,$safeeval)=@_;
1.136     albertel   66:     my $id = &Apache::lonxml::get_id($parstack,$safeeval);
1.73      albertel   67:     if ($#Apache::inputtags::import > -1) {
                     68: 	&Apache::lonxml::debug("Turning :$id: into");
                     69: 	$id = join('_',@Apache::inputtags::import).'_'.$id;
                     70: 	&Apache::lonxml::debug("New  :$id:");
                     71:     }
                     72:     push (@Apache::inputtags::response,$id);
                     73:     push (@Apache::inputtags::responselist,$id);
                     74:     @Apache::inputtags::inputlist=();
1.101     albertel   75:     if ($Apache::inputtags::part eq '' && 
                     76: 	!$Apache::lonhomework::ignore_response_errors) {
1.97      albertel   77: 	&Apache::lonxml::error(&HTML::Entities::encode(&mt("Found a <*response> outside of a <part> in a <part>ed problem"),'<>&"'));
1.92      albertel   78:     }
                     79:     if ($Apache::inputtags::response_with_no_part &&
                     80: 	$Apache::inputtags::part ne '0') {
1.97      albertel   81: 	&Apache::lonxml::error(&HTML::Entities::encode(&mt("<*response>s are both inside of <part> and outside of <part>, this is not a valid problem, errors in grading may occur."),'<>&"').'<br />');
1.92      albertel   82:     }
                     83:     if ($Apache::inputtags::part eq '0') {
                     84: 	$Apache::inputtags::response_with_no_part=1;
                     85:     }
1.73      albertel   86:     return $id;
1.13      albertel   87: }
                     88: 
                     89: sub end_response {
1.79      albertel   90:     #pop @Apache::inputtags::response;
1.73      albertel   91:     @Apache::inputtags::inputlist=();
                     92:     return '';
1.13      albertel   93: }
                     94: 
1.41      albertel   95: sub start_hintresponse {
1.73      albertel   96:     my ($parstack,$safeeval)=@_;
1.136     albertel   97:     my $id = &Apache::lonxml::get_id($parstack,$safeeval);
1.123     albertel   98:     push (@Apache::inputtags::hint,$id);
                     99:     push (@Apache::inputtags::hintlist,$id);
1.73      albertel  100:     push (@Apache::inputtags::paramstack,[%Apache::inputtags::params]);
                    101:     return $id;
1.41      albertel  102: }
                    103: 
                    104: sub end_hintresponse {
1.123     albertel  105:     pop @Apache::inputtags::hint;
1.73      albertel  106:     if (defined($Apache::inputtags::paramstack[-1])) {
                    107: 	%Apache::inputtags::params=
                    108: 	    @{ pop(@Apache::inputtags::paramstack) };
                    109:     }
                    110:     return '';
1.41      albertel  111: }
                    112: 
1.99      albertel  113: my @randomseeds;
                    114: sub pushrandomnumber {
                    115:     my $rand_alg=&Apache::lonnet::get_rand_alg();
                    116:     if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
                    117: 	$rand_alg eq '64bit2') {
                    118: 	# do nothing
                    119:     } else {
                    120: 	my @seed=&Math::Random::random_get_seed();
1.127     albertel  121: 	push(@randomseeds,\@seed);
1.99      albertel  122:     }
1.127     albertel  123:     &Apache::response::setrandomnumber(@_);
1.99      albertel  124: }
                    125: sub poprandomnumber {
                    126:     my $rand_alg=&Apache::lonnet::get_rand_alg();
                    127:     if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
                    128: 	$rand_alg eq '64bit2') {
                    129: 	return;
                    130:     }
                    131:     my $seed=pop(@randomseeds);
                    132:     if ($seed) {
                    133: 	&Math::Random::random_set_seed(@$seed);
                    134:     } else {
                    135: 	&Apache::lonxml::error("Unable to restore random algorithm.");
                    136:     }
                    137: }
1.117     albertel  138: 
1.26      albertel  139: sub setrandomnumber {
1.221     raeburn   140:     my ($ignore_id2,$target,$rndseed) = @_;
                    141:     if (!defined($rndseed)) {
                    142:         $rndseed=&Apache::structuretags::setup_rndseed(undef,$target);
                    143:     } 
1.88      albertel  144:     if (!defined($rndseed)) { $rndseed=&Apache::lonnet::rndseed(); }
1.73      albertel  145:     &Apache::lonxml::debug("randseed $rndseed");
                    146:     #  $rndseed=unpack("%32i",$rndseed);
1.99      albertel  147:     my $rand_alg=&Apache::lonnet::get_rand_alg();
1.126     albertel  148:     my ($rndmod,$rndmod2);
1.119     albertel  149: 
                    150:     my ($id1,$id2,$shift_amt);
                    151:     if ($Apache::lonhomework::parsing_a_problem) {
                    152: 	$id1=$Apache::inputtags::part;
                    153: 	if (defined($Apache::inputtags::response[-1])) {
                    154: 	    $id2=$Apache::inputtags::response[-1];
                    155: 	}
                    156: 	$shift_amt=scalar(@Apache::inputtags::responselist);
                    157:     } elsif ($Apache::lonhomework::parsing_a_task) {
1.141     albertel  158: 	$id1=&Apache::bridgetask::get_dim_id();
                    159: 	if (!$ignore_id2 && ref($Apache::bridgetask::instance{$id1})) {
                    160: 	    $id2=$Apache::bridgetask::instance{$id1}[-1];
1.142     albertel  161: 	    $shift_amt=scalar(@{$Apache::bridgetask::instance{$id1}});
                    162: 	} else {
                    163: 	    $shift_amt=0;
1.119     albertel  164: 	}
                    165:     } 
                    166:     &Apache::lonxml::debug("id1: $id1, id2: $id2, shift_amt: $shift_amt");
1.99      albertel  167:     if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
                    168: 	$rand_alg eq '64bit2') {
1.119     albertel  169: 	$rndmod=(&Apache::lonnet::numval($id1) << 10);
                    170: 	if (defined($id2)) { $rndmod+=&Apache::lonnet::numval($id2); }
1.110     albertel  171:     } elsif ($rand_alg eq '64bit3') {
1.119     albertel  172: 	$rndmod=(&Apache::lonnet::numval2($id1) << 10);
                    173: 	if (defined($id2)) { $rndmod+=&Apache::lonnet::numval2($id2); }
1.126     albertel  174:     } elsif ($rand_alg eq '64bit4') {
1.119     albertel  175: 	my $shift=(4*$shift_amt)%30;
                    176: 	$rndmod=(&Apache::lonnet::numval3($id1) << (($shift+15)%30));
                    177: 	if (defined($id2)) {
                    178: 	    $rndmod+=(&Apache::lonnet::numval3($id2) << $shift );
1.110     albertel  179: 	}
1.126     albertel  180:     } else {
                    181: 	($rndmod,$rndmod2)=&Apache::lonnet::digest("$id1,$id2");
1.99      albertel  182:     }
1.224     www       183:     $Apache::lonhomework::results{'resource.'.$id1.'.rawrndseed'}=$rndseed;
1.99      albertel  184:     if ($rndseed =~/([,:])/) {
                    185: 	my $char=$1;
                    186: 	use integer;
                    187: 	my ($num1,$num2)=split(/\Q$char\E/,$rndseed);
                    188: 	$num1+=$rndmod;
1.126     albertel  189: 	$num2+= ((defined($rndmod2)) ? $rndmod2 : $rndmod);
1.109     albertel  190: 	if($Apache::lonnet::_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
1.99      albertel  191: 	$rndseed=$num1.$char.$num2;
                    192:     } else {
1.74      albertel  193: 	$rndseed+=$rndmod;
1.109     albertel  194: 	if($Apache::lonnet::_64bit) {
                    195: 	    use integer;
                    196: 	    $rndseed=(($rndseed<<32)>>32);
                    197: 	}
1.74      albertel  198:     }
1.111     albertel  199:     &Apache::lonxml::debug("randseed $rndmod $rndseed");
1.223     www       200:     $Apache::lonhomework::results{'resource.'.$id1.'.rndseed'}=$rndseed;
1.74      albertel  201:     &Apache::lonnet::setup_random_from_rndseed($rndseed);
1.73      albertel  202:     return '';
1.26      albertel  203: }
                    204: 
1.7       www       205: sub meta_parameter_write {
1.38      albertel  206:     my ($name,$type,$default,$display)=@_;
1.41      albertel  207:     my $partref=$Apache::inputtags::part;
                    208:     my $result='<parameter part="'.$Apache::inputtags::part.'"';
                    209:     if (defined($Apache::inputtags::response[-1])) {
1.73      albertel  210: 	$result.=            ' id="'.$Apache::inputtags::response[-1].'"';
                    211: 	$partref.='_'.$Apache::inputtags::response[-1];
1.41      albertel  212:     }
                    213:     $result.=            ' name="'.$name.'"'.
                    214:                          ' type="'.$type.'"'.
1.89      albertel  215: (defined($default)?' default="'.$default.'"':'').
                    216: (defined($display)?' display="'.$display.' [Part: '.$partref.']"':'')
1.41      albertel  217:              .'></parameter>'
                    218:              ."\n";
                    219:     return $result;
1.33      www       220: }
                    221: 
                    222: sub meta_package_write {
                    223:     my $name=shift;
1.41      albertel  224:     my $result = '<parameter part="'.$Apache::inputtags::part.'"';
                    225:     if(defined($Apache::inputtags::response[-1])) {
1.73      albertel  226: 	$result.= ' id="'.$Apache::inputtags::response[-1].'"';
1.41      albertel  227:     }
                    228:     $result.=' package="'.$name.'"></parameter>'."\n";
                    229:     return $result;
1.7       www       230: }
                    231: 
                    232: sub meta_stores_write {
1.10      www       233:     my ($name,$type,$display)=@_;
1.41      albertel  234:     my $partref=$Apache::inputtags::part;
                    235:     my $result = '<stores part="'.$Apache::inputtags::part.'"';
                    236:     if (defined($Apache::inputtags::response[-1])) {
1.73      albertel  237: 	$result.=           ' id="'.$Apache::inputtags::response[-1].'"';
                    238: 	$partref.='_'.$Apache::inputtags::response[-1];
1.41      albertel  239:     }	
                    240:     $result.=          ' name="'.$name.'"'.
                    241:                        ' type="'.$type.'"'.
                    242: 	            ' display="'.$display.' [Part: '.$partref.']"'.
                    243: 		      "></stores>\n";
1.7       www       244: }
                    245: 
1.207     jms       246: =pod
                    247: 
1.210     raeburn   248: =item mandatory_part_meta()
1.207     jms       249: 
                    250: Autogenerate metadata for mandatory
1.210     raeburn   251: input (from RAT or lonparmset) and
1.207     jms       252: output (to lonspreadsheet)
                    253: of each part
                    254: 
                    255: Note: responseid-specific data 'submission' and 'awarddetail'
                    256: not available to spreadsheet -> skip here
                    257: 
                    258: =cut
                    259: 
1.210     raeburn   260: 
                    261: sub mandatory_part_meta {
                    262:     return &meta_package_write('part').
                    263:            &meta_stores_write('solved','string','Problem Status').
                    264:            &meta_stores_write('tries','int_zeropos','Number of Attempts').
                    265:            &meta_stores_write('awarded','float','Partial Credit Factor');
1.86      albertel  266: }
                    267: 
                    268: sub meta_part_order {
                    269:     if (@Apache::inputtags::partlist) {
                    270: 	my @parts=@Apache::inputtags::partlist;
                    271: 	shift(@parts);
1.100     albertel  272: 	return '<partorder>'.join(',',@parts).'</partorder>'."\n";
1.86      albertel  273:     } else {
1.100     albertel  274: 	return '<partorder>0</partorder>'."\n";
                    275:     }
                    276: }
                    277: 
                    278: sub meta_response_order {
                    279:     if (@Apache::inputtags::responselist) {
                    280: 	return '<responseorder>'.join(',',@Apache::inputtags::responselist).
                    281: 	    '</responseorder>'."\n";
1.86      albertel  282:     }
1.14      albertel  283: }
                    284: 
1.15      albertel  285: sub check_for_previous {
1.219     raeburn   286:     my ($curresponse,$partid,$id,$last,$type) = @_;
1.73      albertel  287:     my %previous;
                    288:     $previous{'used'} = 0;
1.221     raeburn   289:     my $questiontype = $Apache::lonhomework::type;
                    290:     my $curr_rndseed = $env{'form.'.$partid.'.rndseed'};
1.73      albertel  291:     foreach my $key (sort(keys(%Apache::lonhomework::history))) {
1.212     raeburn   292: 	if ($key =~ /resource\.\Q$partid\E\.\Q$id\E\.submission$/) {
1.160     albertel  293: 	    if ( $last && $key =~ /^(\d+):/ ) {
                    294: 		next if ($1 >= $last);
                    295: 	    }
1.73      albertel  296: 	    &Apache::lonxml::debug("Trying $key");
                    297: 	    my $pastresponse=$Apache::lonhomework::history{$key};
                    298: 	    if ($pastresponse eq $curresponse) {
                    299: 		my $history;
                    300: 		if ( $key =~ /^(\d+):/ ) {
1.221     raeburn   301:                     $history=$1;
                    302:                     next if ((($questiontype eq 'randomizetry') ||
                    303:                              ($Apache::lonhomework::history{"$history:resource.$partid.type"} eq 'randomizetry')) &&
                    304:                              ($curr_rndseed ne $Apache::lonhomework::history{"$history:resource.$partid.rndseed"}));
1.73      albertel  305: 		    $previous{'award'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
                    306: 		    $previous{'last'}='0';
                    307: 		    push(@{ $previous{'version'} },$history);
                    308: 		} else {
1.221     raeburn   309:                     next if ((($questiontype eq 'randomizetry') ||
                    310:                              ($Apache::lonhomework::history{"resource.$partid.type"} eq 'randomizetry')) &&
                    311:                              ($curr_rndseed ne $Apache::lonhomework::history{"resource.$partid.rndseed"}));
1.73      albertel  312: 		    $previous{'award'} = $Apache::lonhomework::history{"resource.$partid.$id.awarddetail"};
                    313: 		    $previous{'last'}='1';
                    314: 		}
1.221     raeburn   315:                 $previous{'used'} = 1;
1.73      albertel  316: 		if (! $previous{'award'} ) { $previous{'award'} = 'UNKNOWN';	}
1.209     www       317:                 if ($previous{'award'} eq 'INTERNAL_ERROR') { $previous{'used'}=0; }
1.73      albertel  318: 		&Apache::lonxml::debug("got a match :$previous{'award'}:$previous{'used'}:");
1.219     raeburn   319:             } elsif ($type eq 'ci') {
                    320:                 if (lc($pastresponse) eq lc($curresponse)) {
                    321:                     if ($key =~ /^(\d+):/) {
1.221     raeburn   322:                         my $history = $1;
                    323:                         next if (($questiontype eq 'randomizetry') &&
                    324:                              ($curr_rndseed ne $Apache::lonhomework::history{"$history:resource.$partid.rndseed"}));
                    325:                         push (@{$previous{'versionci'}},$history);
1.225     raeburn   326:                         $previous{'awardci'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
1.219     raeburn   327:                         $previous{'usedci'} = 1;
                    328:                     }
                    329:                 }
                    330:             }
1.32      albertel  331: 	}
1.73      albertel  332:     }
                    333:     &Apache::lonhomework::showhash(%previous);
                    334:     return %previous;
1.54      albertel  335: }
                    336: 
                    337: sub handle_previous {
1.73      albertel  338:     my ($previous,$ad)=@_;
                    339:     if ($$previous{'used'} && ($$previous{'award'} eq $ad) ) {
                    340: 	if ($$previous{'last'}) {
                    341: 	    push(@Apache::inputtags::previous,'PREVIOUSLY_LAST');
1.107     albertel  342: 	    push(@Apache::inputtags::previous_version,$$previous{'version'});
1.217     raeburn   343: 	} elsif (($Apache::lonhomework::type ne 'survey') &&
                    344:                  ($Apache::lonhomework::type ne 'surveycred') &&
                    345:                  ($Apache::lonhomework::type ne 'anonsurvey') &&
1.221     raeburn   346:                  ($Apache::lonhomework::type ne 'anonsurveycred')) {
1.73      albertel  347: 	    push(@Apache::inputtags::previous,'PREVIOUSLY_USED');
1.107     albertel  348: 	    push(@Apache::inputtags::previous_version,$$previous{'version'});
1.73      albertel  349: 	}
1.54      albertel  350:     }
1.44      albertel  351: }
                    352: 
1.45      albertel  353: sub view_or_modify {
1.149     albertel  354:     my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
1.73      albertel  355:     my $myself=0;
1.120     albertel  356:     if ( ($name eq $env{'user.name'}) && ($domain eq $env{'user.domain'}) ) {
1.73      albertel  357: 	$myself=1;
                    358:     }
                    359:     my $vgr=&Apache::lonnet::allowed('vgr',$courseid);
                    360:     my $mgr=&Apache::lonnet::allowed('vgr',$courseid);
                    361:     if ($mgr) { return "M"; }
                    362:     if ($vgr) { return "V"; }
                    363:     if ($myself) { return "V"; }
                    364:     return '';
1.45      albertel  365: }
                    366: 
1.44      albertel  367: sub start_dataresponse {
1.73      albertel  368:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    369:     my $id = &Apache::response::start_response($parstack,$safeeval);
                    370:     my $result;
                    371:     if ($target eq 'web') {
                    372: 	$result = $token->[2]->{'display'}.':';
                    373:     } elsif ($target eq 'meta') {
                    374: 	$result = &Apache::response::meta_stores_write($token->[2]->{'name'},
                    375: 						       $token->[2]->{'type'},
                    376: 						       $token->[2]->{'display'});
                    377: 	$result .= &Apache::response::meta_package_write('dataresponse');
                    378:     }
                    379:     return $result;
1.44      albertel  380: }
                    381: 
                    382: sub end_dataresponse {
1.73      albertel  383:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    384:     my $result;
                    385:     if ( $target eq 'web' ) {
                    386:     } elsif ($target eq 'grade' ) {
1.120     albertel  387: 	if ( defined $env{'form.submitted'}) {
1.149     albertel  388: 	    my ($symb,$courseid,$domain,$name)=&Apache::lonnet::whichuser();
1.73      albertel  389: 	    my $allowed=&Apache::lonnet::allowed('mgr',$courseid);
                    390: 	    if ($allowed) {
1.94      albertel  391: 		&Apache::response::setup_params('dataresponse',$safeeval);
1.73      albertel  392: 		my $partid = $Apache::inputtags::part;
                    393: 		my $id = $Apache::inputtags::response['-1'];
1.120     albertel  394: 		my $response = $env{'form.HWVAL_'.$id};
1.73      albertel  395: 		my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
                    396: 		if ( $response =~ /[^\s]/) {
                    397: 		    $Apache::lonhomework::results{"resource.$partid.$id.$name"}=$response;
                    398: 		    $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
                    399: 		    $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}='SUBMITTED';
                    400: 		}
                    401: 	    } else {
                    402: 		$result='Not Permitted to change values.'
                    403: 	    }
1.45      albertel  404: 	}
1.73      albertel  405:     }
                    406:     &Apache::response::end_response;
                    407:     return $result;
1.3       albertel  408: }
                    409: 
1.129     albertel  410: sub start_customresponse {
1.128     albertel  411:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    412:     my $id = &Apache::response::start_response($parstack,$safeeval);
1.129     albertel  413:     push(@Apache::lonxml::namespace,'customresponse');
1.128     albertel  414:     my $result;
1.157     www       415:     @Apache::response::custom_answer=();
                    416:     @Apache::response::custom_answer_type=();
1.128     albertel  417:     &Apache::lonxml::register('Apache::response',('answer'));
                    418:     if ($target eq 'web') {
                    419:   	if (  &Apache::response::show_answer() ) {
                    420: 	    my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
                    421: 						   $safeeval);
1.152     albertel  422: 	    $Apache::inputtags::answertxt{$id}=[$answer];
1.128     albertel  423: 	}
                    424:     } elsif ($target eq 'edit') {
                    425: 	$result.=&Apache::edit::tag_start($target,$token);
                    426: 	$result.=&Apache::edit::text_arg('String to display for answer:',
1.220     www       427: 					 'answerdisplay',$token,'50');
1.128     albertel  428: 	$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    429:     } elsif ($target eq 'modified') {
                    430: 	my $constructtag;
                    431: 	$constructtag=&Apache::edit::get_new_args($token,$parstack,
                    432: 						  $safeeval,'answerdisplay');
                    433: 	if ($constructtag) {
                    434: 	    $result = &Apache::edit::rebuild_tag($token);
                    435: 	}
                    436:     } elsif ($target eq 'answer' || $target eq 'grade') {
                    437: 	&Apache::response::reset_params();
                    438:     } elsif ($target eq 'meta') {
1.129     albertel  439: 	$result .= &Apache::response::meta_package_write('customresponse');
1.128     albertel  440:     }
                    441:     return $result;
                    442: }
                    443: 
1.129     albertel  444: sub end_customresponse {
1.128     albertel  445:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    446:     my $result;
                    447:     my $part=$Apache::inputtags::part;
                    448:     my $id=$Apache::inputtags::response[-1];
                    449:     if ( $target eq 'grade' && &Apache::response::submitted() ) {
                    450: 	my $response = &Apache::response::getresponse();
1.146     albertel  451: 	if ($Apache::lonhomework::type eq 'exam' ||
                    452: 	    &Apache::response::submitted('scantron')) {
                    453: 	    &Apache::response::scored_response($part,$id);
                    454: 	} elsif ( $response =~ /[^\s]/ && 
1.158     www       455: 		  $Apache::response::custom_answer_type[-1] eq 'loncapa/perl') {
1.128     albertel  456: 	    if (!$Apache::lonxml::default_homework_loaded) {
                    457: 		&Apache::lonxml::default_homework_load($safeeval);
                    458: 	    }
                    459: 	    my %previous = &Apache::response::check_for_previous($response,
                    460: 								 $part,$id);
                    461: 	    $Apache::lonhomework::results{"resource.$part.$id.submission"}=
                    462: 		$response;
                    463: 	    my $error;
1.129     albertel  464: 	    ${$safeeval->varglob('LONCAPA::customresponse_submission')}=
1.128     albertel  465: 		$response;
                    466: 	    
1.216     www       467: 	    my ($award,$score) = &Apache::run::run('{ my $submission=$LONCAPA::customresponse_submission;'.$Apache::response::custom_answer[-1].'}',$safeeval);
1.128     albertel  468: 	    if (!&Apache::inputtags::valid_award($award)) {
                    469: 		$error = $award;
                    470: 		$award = 'ERROR';
                    471: 	    }
                    472: 	    &Apache::response::handle_previous(\%previous,$award);
                    473: 	    $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
                    474: 		$award;
1.216     www       475:             if ($award eq 'ASSIGNED_SCORE') {
                    476:                 $Apache::lonhomework::results{"resource.$part.$id.awarded"}=1.0*$score;
                    477:             }
1.128     albertel  478: 	    if ($error) {
                    479: 		$Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
                    480: 		    $error;
                    481: 	    }
                    482: 	}
1.146     albertel  483:     } elsif ( $target eq 'answer') {
                    484: 	$result  = &Apache::response::answer_header('customresponse');
                    485: 	my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
                    486: 						$safeeval);
                    487: 	if ($env{'form.answer_output_mode'} ne 'tex') {
                    488: 	    $answer = '<b>'.$answer.'</b>';
                    489: 	}
                    490: 	$result .= &Apache::response::answer_part('customresponse',$answer);
                    491: 	$result .= &Apache::response::answer_footer('customresponse');
                    492:     }
1.163     albertel  493:     if ($target eq 'web') {
1.229     raeburn   494: 	&setup_prior_tries_hash(\&format_prior_response_custom);
1.163     albertel  495:     }
1.146     albertel  496:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || 
                    497: 	$target eq 'tex' || $target eq 'analyze') {
1.227     raeburn   498:         my $repetition = &repetition();
                    499: 	&Apache::lonxml::increment_counter($repetition,"$part.$id");
1.179     foxr      500: 	if ($target eq 'analyze') {
1.187     raeburn   501:             $Apache::lonhomework::analyze{"$part.$id.type"} = 'customresponse';
1.179     foxr      502: 	    &Apache::lonhomework::set_bubble_lines();
                    503: 	}
1.128     albertel  504:     }
                    505:     pop(@Apache::lonxml::namespace);
1.157     www       506:     pop(@Apache::response::custom_answer);
                    507:     pop(@Apache::response::custom_answer_type);
1.128     albertel  508:     &Apache::lonxml::deregister('Apache::response',('answer'));
                    509:     &Apache::response::end_response();
                    510:     return $result;
                    511: }
                    512: 
1.163     albertel  513: sub format_prior_response_custom {
                    514:     my ($mode,$answer) =@_;
1.229     raeburn   515:     if (ref($answer) eq 'ARRAY') {
                    516:         $answer = '('.join(', ', @{ $answer }).')';
                    517:     }
1.163     albertel  518:     return '<span class="LC_prior_custom">'.
                    519: 	    &HTML::Entities::encode($answer,'"<>&').'</span>';
                    520: }
1.140     www       521: 
1.139     www       522: sub start_mathresponse {
1.140     www       523:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    524:     my $id = &Apache::response::start_response($parstack,$safeeval);
                    525:     push(@Apache::lonxml::namespace,'mathresponse');
1.139     www       526:     my $result;
1.157     www       527:     @Apache::response::custom_answer=();
                    528:     @Apache::response::custom_answer_type=();
1.140     www       529:     &Apache::lonxml::register('Apache::response',('answer'));
                    530:     if ($target eq 'web') {
                    531:   	if (  &Apache::response::show_answer() ) {
                    532: 	    my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
                    533: 						   $safeeval);
1.152     albertel  534: 	    $Apache::inputtags::answertxt{$id}=[$answer];
1.140     www       535: 	}
1.191     www       536: 
1.140     www       537:     } elsif ($target eq 'edit') {
                    538: 	$result.=&Apache::edit::tag_start($target,$token);
                    539: 	$result.=&Apache::edit::text_arg('String to display for answer:',
1.220     www       540: 					 'answerdisplay',$token,'50');
1.150     www       541: 	$result.=&Apache::edit::select_arg('Algebra System:',
                    542: 					   'cas',
1.214     www       543: 					   ['maxima','R'],
1.150     www       544: 					   $token);
                    545: 	$result.=&Apache::edit::text_arg('Argument Array:',
1.193     www       546: 					 'args',$token).
                    547:                  &Apache::loncommon::help_open_topic('Maxima_Argument_Array');
1.192     www       548:         $result.=&Apache::edit::text_arg('Libraries:',
1.193     www       549:                                          'libraries',$token).
                    550:                  &Apache::loncommon::help_open_topic('Maxima_Libraries');
1.140     www       551: 	$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    552:     } elsif ($target eq 'modified') {
                    553: 	my $constructtag;
                    554: 	$constructtag=&Apache::edit::get_new_args($token,$parstack,
1.192     www       555: 						  $safeeval,'answerdisplay','cas','args','libraries');
1.140     www       556: 	if ($constructtag) {
                    557: 	    $result = &Apache::edit::rebuild_tag($token);
                    558: 	}
                    559:     } elsif ($target eq 'answer' || $target eq 'grade') {
                    560: 	&Apache::response::reset_params();
                    561:     } elsif ($target eq 'meta') {
                    562: 	$result .= &Apache::response::meta_package_write('mathresponse');
1.139     www       563:     }
                    564:     return $result;
                    565: }
                    566: 
1.191     www       567: sub edit_mathresponse_button {
                    568:     my ($id,$field)=@_;
                    569:     my $button=&mt('Edit Answer');
1.201     riegler   570: #    my $helplink=&Apache::loncommon::help_open_topic('Formula_Editor');
1.197     riegler   571:     my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'};
1.191     www       572:     return(<<ENDFORMULABUTTON);
1.213     bisitz    573: <script type="text/javascript" language="JavaScript">
1.191     www       574: function edit_${id}_${field} (textarea) {
                    575:     thenumber = textarea;
                    576:     thedata = document.forms['lonhomework'].elements[textarea].value;
                    577:     newwin = window.open("/adm/dragmath/applet/MaximaPopup.html","","width=565,height=400,resizable");
                    578: }
                    579: </script>
1.215     bisitz    580: <a href="javascript:edit_${id}_${field}('${field}');void(0);"><img class="stift" src="$iconpath/stift.gif" alt="$button" title="$button" /></a>
1.191     www       581: ENDFORMULABUTTON
                    582: }
                    583: 
1.139     www       584: sub end_mathresponse {
1.140     www       585:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    586:     my $result;
                    587:     my $part=$Apache::inputtags::part;
                    588:     my $id=$Apache::inputtags::response[-1];
                    589:     if ( $target eq 'grade' && &Apache::response::submitted() ) {
                    590: 	my $response = &Apache::response::getresponse();
1.150     www       591: 	if ( $response =~ /[^\s]/ ) {
1.140     www       592: 	    if (!$Apache::lonxml::default_homework_loaded) {
                    593: 		&Apache::lonxml::default_homework_load($safeeval);
                    594: 	    }
                    595: 	    my %previous = &Apache::response::check_for_previous($response,
                    596: 								 $part,$id);
                    597: 	    $Apache::lonhomework::results{"resource.$part.$id.submission"}=
                    598: 		$response;
                    599: 	    my $error;
1.155     www       600: 	    my $award;
                    601: 	    my $cas = &Apache::lonxml::get_param('cas',$parstack,$safeeval);
                    602:             if ($cas eq 'maxima') {
                    603:                 my $args = [&Apache::lonxml::get_param_var('args',$parstack,$safeeval)];
1.192     www       604:                 $award=&Apache::lonmaxima::maxima_run($Apache::response::custom_answer[-1],$response,$args,
                    605:                                                       &Apache::lonxml::get_param('libraries',$parstack,$safeeval));
1.155     www       606:             }
1.214     www       607:             if ($cas eq 'R') {
                    608:                 my $args = [&Apache::lonxml::get_param_var('args',$parstack,$safeeval)];
                    609:                 $award=&Apache::lonr::r_run($Apache::response::custom_answer[-1],$response,$args,
                    610:                                             &Apache::lonxml::get_param('libraries',$parstack,$safeeval));
                    611:             }
                    612: 
1.140     www       613: 	    if (!&Apache::inputtags::valid_award($award)) {
1.151     albertel  614: 		$error = $award;
                    615: 		$award = 'ERROR';
1.140     www       616: 	    }
                    617: 	    &Apache::response::handle_previous(\%previous,$award);
                    618: 	    $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
                    619: 		$award;
                    620: 	    if ($error) {
                    621: 		$Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
                    622: 		    $error;
                    623: 	    }
                    624: 	}
                    625:     }
1.163     albertel  626:     if ($target eq 'web') {
                    627: 	&setup_prior_tries_hash(\&format_prior_response_math);
1.203     riegler   628:         my $partid = $Apache::inputtags::part;
                    629:         my $id = $Apache::inputtags::response[-1];
                    630:         if (($Apache::inputtags::status['-1'] eq 'CAN_ANSWER')
1.205     raeburn   631:            && (&Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.turnoffeditor') ne 'yes')) {
1.202     riegler   632:             $result.=&edit_mathresponse_button($id,"HWVAL_$id");
                    633:         }
1.163     albertel  634:     }
                    635: 
1.140     www       636:     pop(@Apache::lonxml::namespace);
1.157     www       637:     pop(@Apache::response::custom_answer);
                    638:     pop(@Apache::response::custom_answer_type);
1.140     www       639:     &Apache::lonxml::deregister('Apache::response',('answer'));
                    640:     &Apache::response::end_response();
                    641:     return $result;
1.139     www       642: }
                    643: 
1.163     albertel  644: sub format_prior_response_math {
                    645:     my ($mode,$answer) =@_;
                    646:     return '<span class="LC_prior_math">'.
                    647: 	    &HTML::Entities::encode($answer,'"<>&').'</span>';
                    648: }
                    649: 
1.156     www       650: sub implicit_multiplication {
                    651:     my ($expression)=@_;
                    652: # Escape scientific notation, so 3e8 does not become 3*e*8
                    653: # 3e8 -> 3&8; 3e-8 -> 3&-8; 3E+8 -> e&+8
                    654:     $expression=~s/(\d+)e([\+\-]*\d+)/$1\&\($2\)/gsi;
                    655: # 3x10^8 -> 3&8; 3*10^-8 -> 3&-8
                    656:     $expression=~s/(\d+)(?:x|\*)10(?:\^|\*\*)([\+\-]*\d+)/$1\&\($2\)/gsi;
                    657: # Fill in multiplication signs
                    658: # a b -> a*b;3 b -> 3*b;3 4 -> 3*4
1.176     albertel  659:     $expression=~s/([A-Za-z0-9])\s+(?=[A-Za-z0-9])/$1\*/gs;
1.156     www       660: # )( -> )*(; ) ( -> )*(
                    661:     $expression=~s/\)\s*\(/\)\*\(/gs;
                    662: # 3a -> 3*a; 3( -> 3*(; 3 ( -> 3*(; 3A -> 3*A
                    663:     $expression=~s/(\d)\s*([a-zA-Z\(])/$1\*$2/gs;
                    664: # a ( -> a*(
1.174     riegler   665:     $expression=~s/([A-Za-z0-9])\s+\(/$1\*\(/gs;
1.156     www       666: # )a -> )*a; )3 -> )*3; ) 3 -> )*3
1.174     riegler   667:     $expression=~s/\)\s*([A-Za-z0-9])/\)\*$1/gs;
1.156     www       668: # 3&8 -> 3e8; 3&-4 -> 3e-4
                    669:     $expression=~s/(\d+)\&\(([\+\-]*\d+)\)/$1e$2/gs;
                    670:     return $expression;
                    671: }
1.140     www       672: 
1.128     albertel  673: sub start_answer {
                    674:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    675:     my $result;
1.157     www       676:     push(@Apache::response::custom_answer,
                    677: 	&Apache::lonxml::get_all_text_unbalanced("/answer",$parser));
                    678:     push(@Apache::response::custom_answer_type,
                    679: 	lc(&Apache::lonxml::get_param('type',$parstack,$safeeval)));
                    680:     $Apache::response::custom_answer_type[-1] =~ s/\s+//g;
1.128     albertel  681:     if ($target eq "edit" ) {
                    682: 	$result=&Apache::edit::tag_start($target,$token,'Answer algorithm');
                    683: 	$result.=&Apache::edit::editfield($token->[1],
1.158     www       684: 					  $Apache::response::custom_answer[-1],
1.128     albertel  685: 					  '',80,4);
                    686:     } elsif ( $target eq "modified" ) {
                    687: 	$result=$token->[4].&Apache::edit::modifiedfield('/answer',$parser);
                    688:     }
                    689:     return $result;
                    690: }
                    691: 
                    692: sub end_answer {
                    693:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    694:     if ($target eq 'edit' ) {
                    695: 	return &Apache::edit::end_table();
                    696:     }
                    697: }
                    698: 
1.83      albertel  699: sub decide_package {
                    700:     my ($tagstack)=@_;
                    701:     my $package;
                    702:     if ($$tagstack[-1] eq 'parameter') {
                    703: 	$package='part';
                    704:     } else {
                    705: 	my $i=-1;
                    706: 	while (defined($$tagstack[$i])) {
                    707: 	    if ($$tagstack[$i] =~ /(response|hint)$/) {
                    708: 		$package=$$tagstack[$i];
                    709: 		last;
                    710: 	    }
                    711: 	    $i--;
                    712: 	}
                    713:     }
                    714:     return $package;
                    715: }
                    716: 
1.3       albertel  717: sub start_responseparam {
1.73      albertel  718:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    719:     my $result='';
                    720:     if ($target eq 'meta') {
                    721: 	$result = &meta_parameter_write($token->[2]->{'name'},
                    722: 					$token->[2]->{'type'},
                    723: 					$token->[2]->{'default'},
                    724: 					$token->[2]->{'description'});
                    725:     } elsif ($target eq 'edit') {
                    726: 	$result.=&Apache::edit::tag_start($target,$token);
1.83      albertel  727: 	my $optionlist;
                    728: 	my $package=&decide_package($tagstack);
                    729: 	foreach my $key (sort(keys(%Apache::lonnet::packagetab))) {
                    730: 	    if ($key =~ /^\Q$package\E&(.*)&display$/) {
                    731: 		$optionlist.='<option value="'.$1.'">'.
                    732: 		    $Apache::lonnet::packagetab{$key}.'</option>';
                    733: 	    }
                    734: 	}
                    735: 	if (defined($optionlist)) {
1.206     bisitz    736: 	    $result.=&mt('Use template:').' <select name="'.
1.83      albertel  737: 		&Apache::edit::html_element_name('parameter_package').'">'.
                    738: 		    '<option value=""></option>'.$optionlist.'</select><br />';
                    739: 	}
1.73      albertel  740: 	$result.=&Apache::edit::text_arg('Name:','name',$token).
                    741: 	    &Apache::edit::text_arg('Type:','type',$token).
                    742: 		&Apache::edit::text_arg('Description:','description',$token).
                    743: 		    &Apache::edit::text_arg('Default:','default',$token).
                    744: 			"</td></tr>";
                    745: 	$result.=&Apache::edit::end_table;
                    746:     } elsif ($target eq 'modified') {
1.83      albertel  747: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    748: 						     $safeeval,'name','type',
                    749: 						     'description','default');
                    750: 	my $element=&Apache::edit::html_element_name('parameter_package');
1.120     albertel  751: 	if (defined($env{"form.$element"}) && $env{"form.$element"} ne '') {
                    752: 	    my $name=$env{"form.$element"};
1.83      albertel  753: 	    my $tag=&decide_package($tagstack);
                    754: 	    $token->[2]->{'name'}=$name;
                    755: 	    $token->[2]->{'type'}=
                    756: 		$Apache::lonnet::packagetab{"$tag&$name&type"};
                    757: 	    $token->[2]->{'description'}=
                    758: 		$Apache::lonnet::packagetab{"$tag&$name&display"};
                    759: 	    $token->[2]->{'default'}=
                    760: 		$Apache::lonnet::packagetab{"$tag&$name&default"};
1.186     raeburn   761:             $token->[3] = ['name','type','description','default'];
1.83      albertel  762: 	    $constructtag=1;
                    763: 	}
1.73      albertel  764: 	if ($constructtag) {
                    765: 	    $result = &Apache::edit::rebuild_tag($token);
                    766: 	}
                    767:     } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
                    768: 	     $target eq 'tex' || $target eq 'analyze' ) {
1.120     albertel  769: 	if ($env{'request.state'} eq 'construct') {
1.73      albertel  770: 	    my $name   =&Apache::lonxml::get_param('name',$parstack,$safeeval);
                    771: 	    my $default=&Apache::lonxml::get_param('default',$parstack,
                    772: 						     $safeeval);
                    773: 	    if ($name) {$Apache::inputtags::params{$name}=$default;}
                    774: 	}
1.52      albertel  775:     }
1.73      albertel  776:     return $result;
1.3       albertel  777: }
                    778: 
                    779: sub end_responseparam {
1.73      albertel  780:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    781:     if ($target eq 'edit') { return ('','no'); }
                    782:     return '';
1.55      albertel  783: }
                    784: 
                    785: sub start_parameter {
1.114     albertel  786:     return &start_responseparam(@_);
1.55      albertel  787: }
                    788: 
                    789: sub end_parameter {
1.114     albertel  790:     return &end_responseparam(@_);
1.42      albertel  791: }
                    792: 
1.67      albertel  793: sub reset_params {
                    794:     %Apache::inputtags::params=();
                    795: }
                    796: 
1.42      albertel  797: sub setup_params {
1.94      albertel  798:     my ($tag,$safeeval) = @_;
1.42      albertel  799: 
1.120     albertel  800:     if ($env{'request.state'} eq 'construct') { return; }
1.73      albertel  801:     my %paramlist=();
                    802:     foreach my $key (keys(%Apache::lonnet::packagetab)) {
1.161     albertel  803: 	if ($key =~ /^\Q$tag\E/) {
1.73      albertel  804: 	    my ($package,$name) = split(/&/,$key);
                    805: 	    $paramlist{$name}=1;
                    806: 	}
1.42      albertel  807:     }
1.73      albertel  808:     foreach my $key (keys(%paramlist)) {
                    809: 	my $entry= 'resource.'.$Apache::inputtags::part;
                    810: 	if (defined($Apache::inputtags::response[-1])) {
                    811: 	    $entry.='_'.$Apache::inputtags::response[-1];
                    812: 	}
                    813: 	$entry.='.'.$key;
                    814: 	&Apache::lonxml::debug("looking for $entry");
                    815: 	my $value = &Apache::lonnet::EXT("$entry");
                    816: 	&Apache::lonxml::debug("$key has value :$value:");
                    817: 	if ($value eq 'con_lost' || $value =~ /^error:/) {
                    818: 	    &Apache::lonxml::debug("using nothing");
                    819: 	    $Apache::inputtags::params{$key}='';
                    820: 	} else {
1.94      albertel  821: 	    my $string="{return qq\0".$value."\0}";
                    822: 	    my $newvalue=&Apache::run::run($string,$safeeval,1);
                    823: 	    if (defined($newvalue)) { $value=$newvalue; }
1.73      albertel  824: 	    $Apache::inputtags::params{$key}=$value;
                    825: 	}
1.42      albertel  826:     }
1.48      albertel  827: }
                    828: 
1.132     albertel  829: {
                    830:     my @answer_bits;
1.147     albertel  831:     my $need_row_start;
1.132     albertel  832: 
1.48      albertel  833: sub answer_header {
1.147     albertel  834:     my ($type,$increment,$rows) = @_;
1.73      albertel  835:     my $result;
1.120     albertel  836:     if ($env{'form.answer_output_mode'} eq 'tex') {
1.132     albertel  837: 	undef(@answer_bits);
1.133     albertel  838: 	my $bit;
                    839: 	if ($Apache::lonhomework::type eq 'exam') {
                    840: 	    $bit = ($Apache::lonxml::counter+$increment).') ';
                    841: 	} else {
                    842: 	    $bit .= ' Answer for Part: \verb|'.
                    843: 		$Apache::inputtags::part.'| ';
                    844: 	}
                    845: 	push(@answer_bits,$bit);
1.73      albertel  846:     } else {
1.147     albertel  847: 	my $td = '<td '.(defined($rows)?'rowspan="'.$rows.'"':'').'>';
1.132     albertel  848: 	$result  = '<table border="1"><tr>';
                    849: 	if ($Apache::lonhomework::type eq 'exam') {
1.147     albertel  850: 	    $result .= $td.($Apache::lonxml::counter+$increment). ')</td>';
1.132     albertel  851: 	} else {
1.147     albertel  852: 	    $result .= $td.&mt('Answer for Part: [_1]',
                    853: 			       $Apache::inputtags::part).'</td>';
1.132     albertel  854: 	}
                    855: 	$result .= "\n";
1.147     albertel  856: 	$need_row_start = 0;
                    857:     }
                    858:     return $result;
                    859: }
                    860: 
                    861: sub next_answer {
                    862:     my ($type) = @_;
                    863:     my $result;
                    864:     if ($env{'form.answer_output_mode'} eq 'tex') {
                    865: 	# FIXME ... need to do something with tex mode
                    866:     } else {
                    867: 	$result .= "</tr>";
                    868: 	$need_row_start = 1;
1.73      albertel  869:     }
                    870:     return $result;
1.48      albertel  871: }
                    872: 
                    873: sub answer_part {
1.148     albertel  874:     my ($type,$answer,$args) = @_;
1.73      albertel  875:     my $result;
1.120     albertel  876:     if ($env{'form.answer_output_mode'} eq 'tex') {
1.148     albertel  877: 	if (!$args->{'no_verbatim'}) {
                    878: 	    my $to_use='|';
                    879: 	    foreach my $value (32..126) {
                    880: 		my $char=pack('c',$value);
                    881: 		if ($answer !~ /\Q$char\E/) {
                    882: 		    $to_use=$char;
                    883: 		    last;
                    884: 		}
                    885: 	    }
1.189     www       886:             my $fullanswer=$answer;
1.188     www       887:             $answer='';
1.189     www       888:             foreach my $element (split(/[\;]/,$fullanswer)) {
                    889: 	       if ($element ne '') {
                    890: 	 	  $answer.= '\verb'.$to_use.$element.$to_use.' \newline';
                    891: 	       }
1.188     www       892:             }
1.124     albertel  893: 	}
1.132     albertel  894: 	if ($answer ne '') {
1.148     albertel  895: 	    push(@answer_bits,$answer);
1.132     albertel  896: 	}
1.73      albertel  897:     } else {
1.147     albertel  898: 	if ($need_row_start) {
                    899: 	    $result .= '<tr>';
                    900: 	    $need_row_start = 0;
                    901: 	}
1.189     www       902: 	$result .= '<td>'.$answer.'</td>';
1.73      albertel  903:     }
                    904:     return $result;
1.48      albertel  905: }
                    906: 
                    907: sub answer_footer {
1.73      albertel  908:     my ($type) = @_;
                    909:     my $result;
1.120     albertel  910:     if ($env{'form.answer_output_mode'} eq 'tex') {
1.189     www       911: 	$result  = ' \vskip 0 mm \noindent \begin{tabular}{|p{1.5cm}|p{6.8cm}|}\hline ';
                    912: 	$result .= $answer_bits[0].'&\vspace*{-4mm}\begin{itemize}';
                    913:         for (my $i=1;$i<=$#answer_bits;$i++) {
                    914:             $result.='\item '.$answer_bits[$i].'\vspace*{-7mm}';
                    915:         }
                    916: 	$result .= ' \end{itemize} \\\\ \hline \end{tabular} \vskip 0 mm ';
1.73      albertel  917:     } else {
1.185     albertel  918: 	if (!$need_row_start) {
                    919: 	    $result .= '</tr>';
                    920: 	}
                    921: 	$result .= '</table>';
1.73      albertel  922:     }
                    923:     return $result;
1.1       albertel  924: }
1.2       albertel  925: 
1.132     albertel  926: }
                    927: 
1.62      albertel  928: sub showallfoils {
1.120     albertel  929:     if (defined($env{'form.showallfoils'})) {
1.149     albertel  930: 	my ($symb)=&Apache::lonnet::whichuser();
1.120     albertel  931: 	if (($env{'request.state'} eq 'construct') || 
                    932: 	    ($env{'user.adv'} && $symb eq '')      ||
1.118     foxr      933:             ($Apache::lonhomework::viewgrades) ) {
1.102     albertel  934: 	    return 1;
                    935: 	}
1.73      albertel  936:     }
1.108     albertel  937:     if ($Apache::lonhomework::type eq 'survey') { return 1; }
1.217     raeburn   938:     if ($Apache::lonhomework::type eq 'surveycred') { return 1; }
                    939:     if ($Apache::lonhomework::type eq 'anonsurvey') { return 1; }
                    940:     if ($Apache::lonhomework::type eq 'anonsurveycred') { return 1; }
                    941: 
1.102     albertel  942:     return 0;
1.70      albertel  943: }
                    944: 
1.168     albertel  945: =pod
                    946: 
1.210     raeburn   947: =item &getresponse();
1.168     albertel  948: 
                    949: Retreives the current submitted response, helps out in the case of
                    950: scantron mode.
                    951: 
                    952: Returns either the exact text of the submission, or a bubbled response
                    953: converted to something usable.
                    954: 
                    955: Optional Arguments:
1.171     albertel  956:   $offset - (defaults to 1) if a problem has more than one bubble
                    957:             response, pass in the number of the bubble wanted, (the
                    958:             first bubble associated with a problem has an offset of 1,
                    959:             the second bubble is 2
                    960: 
1.168     albertel  961:   $resulttype - undef    -> a number between 0 and 25
                    962:                 'A is 1' -> a number between 1 and 26
                    963:                 'letter' -> a letter between 'A' and 'Z'
1.172     foxr      964:   $lines  - undef problem only needs a single line of bubbles.
                    965:             nonzero  Problem wants the first nonempty response in 
                    966:                       $lines lines of bubbles.
                    967:   $bubbles_per_line - Must be provided if lines is defined.. number of
                    968:                       bubbles on a line.
1.173     albertel  969: 
1.168     albertel  970: =cut
                    971: 
1.70      albertel  972: sub getresponse {
1.172     foxr      973:     my ($offset,$resulttype, $lines, $bubbles_per_line)=@_;
1.70      albertel  974:     my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
                    975:     my $response;
1.168     albertel  976:     if (!defined($offset)) {
1.170     albertel  977: 	$offset=1;
1.70      albertel  978:     } else {
1.168     albertel  979: 	$formparm.=":$offset";
1.70      albertel  980:     }
1.172     foxr      981:     if (!defined($lines)) {
                    982: 	$lines = 1;
                    983:     }
1.70      albertel  984:     my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
                    985: 		    'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
                    986: 		    'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
                    987: 		    'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
1.120     albertel  988:     if ($env{'form.submitted'} eq 'scantron') {
1.71      albertel  989: 	my $part  = $Apache::inputtags::part;
                    990: 	my $id    = $Apache::inputtags::response[-1];
1.172     foxr      991: 	
                    992: 	my $line;
1.211     raeburn   993: 	my $startline = $env{'form.scantron_questnum_start.'.$part.'.'.$id};
                    994:         if (!$startline) {
                    995:             $startline = $Apache::lonxml::counter;
                    996:         }
1.172     foxr      997: 	for ($line = 0; $line < $lines; $line++) {
1.211     raeburn   998:             my $theline = $startline+$offset-1+$line;
1.184     foxr      999: 	    $response = $env{"scantron.$theline.answer"};
                   1000: 	    if ((defined($response)) && ($response ne "") && ($response ne " ")) {
1.172     foxr     1001: 		last;
                   1002: 	    }
1.211     raeburn  1003:  
1.172     foxr     1004: 	}
1.178     albertel 1005: 
                   1006: 	# save bubbled letter for later
                   1007: 	$Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
                   1008: 	    $response;
1.90      albertel 1009: 	if ($resulttype ne 'letter') {
1.226     raeburn  1010:             $response = $let_to_num{$response};
                   1011:             if ($resulttype eq 'A is 1') {
                   1012:                 if ($response ne "") {
                   1013:                     $response = $response+1;
                   1014:                 }
1.104     albertel 1015: 	    }
1.172     foxr     1016: 	    if ($response ne "") {
                   1017: 		$response += $line * $bubbles_per_line;
                   1018: 	    }
                   1019: 	} else {
                   1020: 	    if ($response ne "") {
1.226     raeburn  1021:                 my $raw = $response;
1.172     foxr     1022: 		$response = chr(ord($response) + $line * $bubbles_per_line);
                   1023: 	    }
1.90      albertel 1024: 	}
1.172     foxr     1025: 
1.70      albertel 1026:     } else {
1.120     albertel 1027: 	$response = $env{$formparm};
1.70      albertel 1028:     }
1.172     foxr     1029:     # 
                   1030:     #  If we have a nonempty answer, correct the numeric value
                   1031:     #  of the answer for the line on which it was found.
                   1032:     #
                   1033: 
1.70      albertel 1034:     return $response;
1.62      albertel 1035: }
1.71      albertel 1036: 
1.168     albertel 1037: =pod
                   1038: 
                   1039: =item &repetition();
                   1040: 
1.227     raeburn  1041: In scalar context:
                   1042: 
                   1043: returns: the number of lines that are required to encode the weight.
1.226     raeburn  1044: (Default is for 10 bubbles per bubblesheet item; other (integer) 
                   1045: values can be specified by using a custom Bubblesheet format file 
                   1046: with an eighteenth entry (BubblesPerRow) set to the integer 
                   1047: appropriate for the bubblesheets which will be used to assign weights.
1.168     albertel 1048: 
1.227     raeburn  1049: In array context:
                   1050:  
                   1051: returns: number of lines required to encode weight, and bubbles/line.
                   1052: 
1.168     albertel 1053: =cut
                   1054: 
1.71      albertel 1055: sub repetition {
                   1056:     my $id = $Apache::inputtags::part;
                   1057:     my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.121     albertel 1058:     if (!defined($weight) || ($weight eq '')) { $weight=1; }
1.226     raeburn  1059:     my $bubbles_per_row;
                   1060:     if (($env{'form.bubbles_per_row'} =~ /^\d+$/) && 
                   1061:         ($env{'form.bubbles_per_row'} > 0)) {
                   1062:         $bubbles_per_row = $env{'form.bubbles_per_row'};
                   1063:     } else {
                   1064:         $bubbles_per_row = 10;
                   1065:     }
1.227     raeburn  1066:     my $denominator = $bubbles_per_row;
                   1067:     if (($env{'form.scantron_lastbubblepoints'} == 0) && 
                   1068:         ($bubbles_per_row > 1)) {
                   1069:         $denominator = $bubbles_per_row - 1;
                   1070:     } 
                   1071:     my $repetition = int($weight/$denominator);
                   1072:     if ($weight % $denominator != 0) { $repetition++; } 
                   1073:     if (wantarray) {
                   1074:         return ($repetition,$bubbles_per_row);
                   1075:     }
1.72      albertel 1076:     return $repetition;
1.227     raeburn  1077: 
1.72      albertel 1078: }
                   1079: 
1.168     albertel 1080: =pod
                   1081: 
1.210     raeburn  1082: =item &scored_response();
1.168     albertel 1083: 
                   1084: Sets the results hash elements
                   1085: 
                   1086:    resource.$part_id.$response_id.awarded - to the floating point
                   1087:      number between 0 and 1 that was awarded on the bubbled input
                   1088: 
                   1089:    resource.$part_id.$response_id.awarddetail - to 'ASSIGNED_SCORE'
                   1090: 
                   1091: Returns
                   1092: 
                   1093:    the number of bubble sheet lines that were used (and likely need to
                   1094:      be passed to &Apache::lonxml::increment_counter()
                   1095: 
                   1096: Arguments
                   1097: 
                   1098:    $part_id - id of the part to grade
                   1099:    $response_id - id of the response to grade
                   1100:   
                   1101: 
                   1102: =cut
                   1103: 
1.72      albertel 1104: sub scored_response {
                   1105:     my ($part,$id)=@_;
                   1106:     my $repetition=&repetition();
1.227     raeburn  1107:     my $bubbles_per_row;
                   1108:     if (($env{'form.bubbles_per_row'} =~ /^\d+$/) &&
                   1109:         ($env{'form.bubbles_per_row'} > 0)) {
                   1110:         $bubbles_per_row = $env{'form.bubbles_per_row'};
                   1111:     } else {
                   1112:         $bubbles_per_row = 10;
                   1113:     }
1.72      albertel 1114:     my $score=0;
                   1115:     for (my $i=0;$i<$repetition;$i++) {
1.227     raeburn  1116: 	# A is 1, B is 2, etc.
1.72      albertel 1117: 	my $increase=&Apache::response::getresponse($i+1);
1.227     raeburn  1118:         unless (($increase == $bubbles_per_row-1) &&
                   1119:                 ($env{'form.scantron_lastbubblepoints'} == 0)) {
                   1120:             # (get response return 0-9 and then we add 1)
                   1121:             if ($increase ne '') {
                   1122:                 $score+=$increase+1;
                   1123:             }
                   1124:         }
1.72      albertel 1125:     }
                   1126:     my $weight = &Apache::lonnet::EXT("resource.$part.weight");
1.91      albertel 1127:     if (!defined($weight) || $weight eq '' || $weight eq 0) { $weight = 1; }
1.72      albertel 1128:     my $pcr=$score/$weight;
                   1129:     $Apache::lonhomework::results{"resource.$part.$id.awarded"}=$pcr;
                   1130:     $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
                   1131: 	'ASSIGNED_SCORE';
1.71      albertel 1132:     return $repetition;
1.78      albertel 1133: }
                   1134: 
                   1135: sub whichorder {
1.221     raeburn  1136:     my ($max,$randomize,$showall,$hash,$rndseed)=@_;
1.78      albertel 1137:     #&Apache::lonxml::debug("man $max randomize $randomize");
1.231     raeburn  1138:     my @names;
                   1139:     if (ref($hash->{'names'}) eq 'ARRAY') {
                   1140:         @names = @{$hash->{'names'}};
                   1141:     }
                   1142:     return if (!@names);
1.78      albertel 1143:     my @whichopt =();
                   1144:     my (%top,@toplist,%bottom,@bottomlist);
                   1145:     if (!($showall || ($randomize eq 'no'))) {
                   1146: 	my $current=0;
                   1147: 	foreach my $name (@names) {
                   1148: 	    $current++;
                   1149: 	    if ($$hash{"$name.location"} eq 'top') {
                   1150: 		$top{$name}=$current;
                   1151: 	    } elsif ($$hash{"$name.location"} eq 'bottom') {
                   1152: 		$bottom{$name}=$current;
                   1153: 	    }
                   1154: 	}
                   1155:     }
                   1156:     my $topcount=0;
                   1157:     my $bottomcount=0;
                   1158:     while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall)
                   1159: 	   && ($#names > -1)) {
                   1160: 	#&Apache::lonxml::debug("Have $#whichopt max is $max");
                   1161: 	my $aopt;
                   1162: 	if ($showall || ($randomize eq 'no')) {
                   1163: 	    $aopt=0;
                   1164: 	} else {
                   1165: 	    $aopt=int(&Math::Random::random_uniform() * ($#names+1));
                   1166: 	}
                   1167: 	#&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
                   1168: 	$aopt=splice(@names,$aopt,1);
                   1169: 	#&Apache::lonxml::debug("Picked $aopt");
                   1170: 	if ($top{$aopt}) {
                   1171: 	    $toplist[$top{$aopt}]=$aopt;
                   1172: 	    $topcount++;
                   1173: 	} elsif ($bottom{$aopt}) {
                   1174: 	    $bottomlist[$bottom{$aopt}]=$aopt;
                   1175: 	    $bottomcount++;
                   1176: 	} else {
                   1177: 	    push (@whichopt,$aopt);
                   1178: 	}
                   1179:     }
                   1180:     for (my $i=0;$i<=$#toplist;$i++) {
                   1181: 	if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
                   1182:     }
                   1183:     for (my $i=0;$i<=$#bottomlist;$i++) {
                   1184: 	if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
                   1185:     }
                   1186:     return @whichopt;
1.71      albertel 1187: }
                   1188: 
1.85      albertel 1189: sub show_answer {
                   1190:     my $part   = $Apache::inputtags::part;
1.228     raeburn  1191:     my $award  = $Apache::lonhomework::history{"resource.$part.solved"};
1.85      albertel 1192:     my $status = $Apache::inputtags::status[-1];
1.228     raeburn  1193:     my $canshow = 0;
                   1194:     if ($award =~ /^correct/) {
1.230     raeburn  1195:         if (($Apache::lonhomework::history{"resource.$part.awarded"} >= 1) ||
                   1196:             (&Apache::lonnet::EXT("resource.$part.retrypartial") !~/^1|on|yes$/)) {
1.228     raeburn  1197:             $canshow = 1;
                   1198:         }   
                   1199:     }
                   1200:     return  (($canshow && &Apache::lonhomework::show_problem_status()) 
                   1201: 	     || $status eq "SHOW_ANSWER");
1.85      albertel 1202: }
1.87      albertel 1203: 
                   1204: sub analyze_store_foilgroup {
                   1205:     my ($shown,$attrs)=@_;
                   1206:     my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
                   1207:     foreach my $name (@{ $Apache::response::foilgroup{'names'} }) {
                   1208: 	if (defined($Apache::lonhomework::analyze{"$part_id.foil.value.$name"})) { next; }
                   1209: 	push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },$name);
                   1210: 	foreach my $attr (@$attrs) {
                   1211: 	    $Apache::lonhomework::analyze{"$part_id.foil.".$attr.".$name"} =
                   1212: 		$Apache::response::foilgroup{"$name.".$attr};
                   1213: 	}
                   1214:     }
                   1215:     push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} }, @{ $shown });
1.96      albertel 1216: }
                   1217: 
                   1218: sub check_if_computed {
                   1219:     my ($token,$parstack,$safeeval,$name)=@_;
                   1220:     my $value = &Apache::lonxml::get_param($name,$parstack,$safeeval);
1.106     matthew  1221:     if (ref($token->[2]) eq 'HASH' && $value ne $token->[2]{$name}) {
1.96      albertel 1222: 	my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
                   1223: 	$Apache::lonhomework::analyze{"$part_id.answercomputed"} = 1;
                   1224:     }
1.87      albertel 1225: }
                   1226: 
                   1227: sub pick_foil_for_concept {
                   1228:     my ($target,$attrs,$hinthash,$parstack,$safeeval)=@_;
1.231     raeburn  1229:     my @names;
                   1230:     if (ref($Apache::response::conceptgroup{'names'}) eq 'ARRAY') {
                   1231:         @names = @{ $Apache::response::conceptgroup{'names'} };
                   1232:     }
                   1233:     return if (!@names);
1.87      albertel 1234:     my $pick=int(&Math::Random::random_uniform() * ($#names+1));
                   1235:     my $name=$names[$pick];
                   1236:     push @{ $Apache::response::foilgroup{'names'} }, $name;
                   1237:     foreach my $attr (@$attrs) {
                   1238: 	$Apache::response::foilgroup{"$name.".$attr} =
                   1239: 	    $Apache::response::conceptgroup{"$name.".$attr};
                   1240:     }
                   1241:     my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
                   1242:     $Apache::response::foilgroup{"$name.concept"} = $concept;
                   1243:     &Apache::lonxml::debug("Selecting $name in $concept");
                   1244:     my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
                   1245:     if ($target eq 'analyze') {
                   1246: 	push (@{ $Apache::lonhomework::analyze{"$part_id.concepts"} },
                   1247: 	      $concept);
                   1248: 	$Apache::lonhomework::analyze{"$part_id.concept.$concept"}=
                   1249: 	    $Apache::response::conceptgroup{'names'};
                   1250: 	foreach my $name (@{ $Apache::response::conceptgroup{'names'} }) {
                   1251: 	    push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },
                   1252: 		  $name);
                   1253: 	    foreach my $attr (@$attrs) {
                   1254: 		$Apache::lonhomework::analyze{"$part_id.foil.$attr.$name"}=
                   1255: 		    $Apache::response::conceptgroup{"$name.$attr"};
                   1256: 	    }
                   1257: 	}
                   1258:     }
                   1259:     push(@{ $hinthash->{"$part_id.concepts"} },$concept);
                   1260:     $hinthash->{"$part_id.concept.$concept"}=
                   1261: 	$Apache::response::conceptgroup{'names'};
                   1262: 
                   1263: }
1.208     jms      1264: 
                   1265: =pod
                   1266: 
                   1267: =item get_response_param()
                   1268: 
                   1269: Get a parameter associated with a problem.
                   1270: Parameters:
                   1271: 	$id        - the id of the paramater, either a part id, 
                   1272:               or a partid and responspe id joined by _
                   1273: 	$name      - Name of the parameter to fetch
                   1274: 	$default   - Default value for the paramter.
                   1275: 
                   1276: =cut
                   1277: 
1.95      albertel 1278: sub get_response_param {
                   1279:     my ($id,$name,$default)=@_;
                   1280:     my $parameter;
1.120     albertel 1281:     if ($env{'request.state'} eq 'construct' &&
1.95      albertel 1282: 	defined($Apache::inputtags::params{$name})) {
                   1283: 	$parameter=$Apache::inputtags::params{$name};
                   1284:     } else {
                   1285: 	$parameter=&Apache::lonnet::EXT("resource.$id.$name");
                   1286:     }
                   1287:     if (!defined($parameter) ||	$parameter eq '') {
                   1288: 	$parameter = $default;
                   1289:     }
                   1290:     return $parameter;
                   1291: }
1.87      albertel 1292: 
1.113     albertel 1293: sub submitted {
                   1294:     my ($who)=@_;
                   1295:     
                   1296:     # when scatron grading any submission is a submission
1.120     albertel 1297:     if ($env{'form.submitted'} eq 'scantron') { return 1; }
1.113     albertel 1298:     # if the caller only cared if this was a scantron submission
                   1299:     if ($who eq 'scantron') { return 0; }
                   1300:     # if the Submit Answer button for this particular part was pressed
                   1301:     my $partid=$Apache::inputtags::part;
1.159     albertel 1302:     if ($env{'form.submitted'} eq "part_$partid") {
                   1303: 	return 1;
                   1304:     }
                   1305:     if ($env{'form.submitted'} eq "yes"
                   1306: 	&& defined($env{'form.submit_'.$partid})) {
                   1307: 	return 1;
                   1308:     }
1.122     albertel 1309:     # Submit All button on a .page was pressed
                   1310:     if (defined($env{'form.all_submit'})) { return 1; }
1.204     bisitz   1311:     # otherwise no submission occurred
1.113     albertel 1312:     return 0;
                   1313: }
1.117     albertel 1314: 
1.130     albertel 1315: sub add_to_gradingqueue {
1.149     albertel 1316:     my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
1.131     albertel 1317:     if (   $courseid eq ''
                   1318: 	|| $symb eq ''
1.135     albertel 1319: 	|| $env{'request.state'} eq 'construct'
                   1320: 	|| $Apache::lonhomework::type ne 'problem') {
1.131     albertel 1321: 	return;
                   1322:     }
1.130     albertel 1323: 
                   1324:     my %queue_info = ( 'type' => 'problem',
                   1325: 		       'time' => time);
                   1326: 
                   1327:     if (exists($Apache::lonhomework::history{"resource.0.checkedin.slot"})) {
                   1328: 	$queue_info{'slot'}=
                   1329: 	     $Apache::lonhomework::history{"resource.0.checkedin.slot"};
                   1330:     }
                   1331: 
                   1332:     my $result=&Apache::bridgetask::add_to_queue('gradingqueue',\%queue_info);
                   1333:     if ($result ne 'ok') {
                   1334: 	&Apache::lonxml::error("add_to_queue said $result");
                   1335:     }
                   1336: }
                   1337: 
1.208     jms      1338: =pod 
                   1339: 
                   1340: =item check_status()
                   1341: 
                   1342: basically undef and 0 (both false) mean that they still have work to do
                   1343: and all true values mean that they can't do any more work
                   1344: 
                   1345: 	a return of undef means it is unattempted
                   1346: 	a return of 0 means it is attmpted and wrong but still has tries
                   1347: 	a return of 1 means it is marked correct
                   1348: 	a return of 2 means they have exceed maximum number of tries
                   1349: 	a return of 3 means it after the answer date
                   1350: 
                   1351: =cut
                   1352: 
1.117     albertel 1353: sub check_status {
                   1354:     my ($id)=@_;
1.143     albertel 1355:     if (!defined($id)) { $id=$Apache::inputtags::part; }
1.117     albertel 1356:     my $curtime=&Apache::lonnet::EXT('system.time');
                   1357:     my $opendate=&Apache::lonnet::EXT("resource.$id.opendate");
                   1358:     my $duedate=&Apache::lonnet::EXT("resource.$id.duedate");
                   1359:     my $answerdate=&Apache::lonnet::EXT("resource.$id.answerdate");
                   1360:     if ( $opendate && $curtime > $opendate &&
                   1361:          $duedate && $curtime > $duedate &&
                   1362:          $answerdate && $curtime > $answerdate) {
                   1363:         return 3;
                   1364:     }
                   1365:     my $status=&Apache::lonnet::EXT("user.resource.resource.$id.solved");
                   1366:     if ($status =~ /^correct/) { return 1; }
                   1367:     if (!$status) { return undef; }
                   1368:     my $maxtries=&Apache::lonnet::EXT("resource.$id.maxtries");
                   1369:     if ($maxtries eq '') { $maxtries=2; }
                   1370:     my $curtries=&Apache::lonnet::EXT("user.resource.resource.$id.tries");
                   1371:     if ($curtries < $maxtries) { return 0; }
                   1372:     return 2;
                   1373: }
                   1374: 
1.177     albertel 1375: =pod
                   1376: 
1.210     raeburn  1377: =item setup_prior_tries_hash()
1.177     albertel 1378: 
                   1379:   Foreach each past .submission $func is called with 3 arguments
                   1380:      - the mode to set things up for (currently always 'grade')
                   1381:      - the stored .submission string
                   1382:      - The expansion of $data
                   1383: 
                   1384:   $data is an array ref containing elements that are either
                   1385:     - scalars that are other elements of the history hash to pass to $func
                   1386:     - ref to data to be passed untouched to $func
                   1387: 
1.221     raeburn  1388:   $questiontype is the questiontype (currently only passed in if
                   1389:       randomizebytry.
                   1390: 
1.177     albertel 1391: =cut
                   1392: 
1.162     albertel 1393: sub setup_prior_tries_hash {
1.221     raeburn  1394:     my ($func,$data,$questiontype) = @_;
1.162     albertel 1395:     my $part = $Apache::inputtags::part;
1.221     raeburn  1396:     my $id   = $Apache::inputtags::response[-1];
1.162     albertel 1397:     foreach my $i (1..$Apache::lonhomework::history{'version'}) {
1.221     raeburn  1398:         my $partprefix = "$i:resource.$part";
                   1399: 	my $sub_key   = "$partprefix.$id.submission";
1.162     albertel 1400: 	next if (!exists($Apache::lonhomework::history{$sub_key}));
1.221     raeburn  1401:         my $type_key = "$partprefix.type";
                   1402:         my $type = $Apache::lonhomework::history{$type_key};
1.162     albertel 1403: 	my @other_data;
1.221     raeburn  1404:         if (ref($data) eq 'ARRAY') {
                   1405: 	    foreach my $datum (@{ $data }) {
                   1406: 	        if (ref($datum)) {
                   1407: 		    push(@other_data,$datum);
                   1408: 	        } else {
                   1409: 		    my $info_key = "$i:resource.$part.$id.$datum";
                   1410: 		    push(@other_data,$Apache::lonhomework::history{$info_key});
                   1411: 	        }
1.162     albertel 1412: 	    }
1.221     raeburn  1413:         }
                   1414:         if ($questiontype eq 'randomizetry') { 
                   1415:             my $order_key = "$partprefix.$id.foilorder";
                   1416:             my @whichopts = &Apache::lonnet::str2array($Apache::lonhomework::history{$order_key});
                   1417:             if (@whichopts > 0) {
                   1418:                 shift(@other_data);
                   1419:                 unshift(@other_data,\@whichopts);
                   1420:             }
                   1421:         }
1.162     albertel 1422: 	my $output =
                   1423: 	    &$func('grade',
                   1424: 		   $Apache::lonhomework::history{$sub_key},
                   1425: 		   \@other_data);
                   1426: 	if (defined($output)) {
                   1427: 	    $Apache::inputtags::submission_display{$sub_key} = $output;
                   1428: 	}
                   1429:     }
                   1430: }
                   1431: 
1.1       albertel 1432: 1;
                   1433: __END__
1.38      albertel 1434:  
1.208     jms      1435: =pod
                   1436: 
1.209     www      1437: =cut

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