--- loncom/homework/response.pm 2000/11/22 00:02:31 1.4 +++ loncom/homework/response.pm 2005/06/29 19:20:10 1.122 @@ -1,40 +1,778 @@ # The LearningOnline Network with CAPA # various response type definitons response definition +# +# $Id: response.pm,v 1.122 2005/06/29 19:20:10 albertel Exp $ +# +# Copyright Michigan State University Board of Trustees +# +# This file is part of the LearningOnline Network with CAPA (LON-CAPA). +# +# LON-CAPA is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# LON-CAPA is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with LON-CAPA; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +# +# /home/httpd/html/adm/gpl.txt +# +# http://www.lon-capa.org/ +# package Apache::response; use strict; +use Apache::lonlocal; +use Apache::lonnet; -sub BEGIN { - &Apache::lonxml::register('Apache::response',('responseparam','caparesponse')); +BEGIN { + &Apache::lonxml::register('Apache::response',('responseparam','parameter','dataresponse')); } -sub start_caparesponse { - require Apache::caparesponse; - import Apache::caparesponse; - my ($target,$token,$parstack,$parser,$safeeval,$style)=@_; -# print "\n
\nsimple caparesponse\n"; - Apache::caparesponse::start_caparesponse($target,$token,$parstack,$parser,$safeeval,$style);; - return ""; +sub start_response { + my ($parstack,$safeeval)=@_; + my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval); + if ($id eq '') { $id = $Apache::lonxml::curdepth; } + if ($#Apache::inputtags::import > -1) { + &Apache::lonxml::debug("Turning :$id: into"); + $id = join('_',@Apache::inputtags::import).'_'.$id; + &Apache::lonxml::debug("New :$id:"); + } + push (@Apache::inputtags::response,$id); + push (@Apache::inputtags::responselist,$id); + @Apache::inputtags::inputlist=(); + if ($Apache::inputtags::part eq '' && + !$Apache::lonhomework::ignore_response_errors) { + &Apache::lonxml::error(&HTML::Entities::encode(&mt("Found a <*response> outside of a in a ed problem"),'<>&"')); + } + if ($Apache::inputtags::response_with_no_part && + $Apache::inputtags::part ne '0') { + &Apache::lonxml::error(&HTML::Entities::encode(&mt("<*response>s are both inside of and outside of , this is not a valid problem, errors in grading may occur."),'<>&"').'
'); + } + if ($Apache::inputtags::part eq '0') { + $Apache::inputtags::response_with_no_part=1; + } + return $id; +} + +sub end_response { + #pop @Apache::inputtags::response; + @Apache::inputtags::inputlist=(); + return ''; +} + +sub start_hintresponse { + my ($parstack,$safeeval)=@_; + my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval); + if ($id eq '') { $id = $Apache::lonxml::curdepth; } + push (@Apache::inputtags::response,$id); + push (@Apache::inputtags::responselist,$id); + push (@Apache::inputtags::paramstack,[%Apache::inputtags::params]); + return $id; +} + +sub end_hintresponse { + pop @Apache::inputtags::response; + if (defined($Apache::inputtags::paramstack[-1])) { + %Apache::inputtags::params= + @{ pop(@Apache::inputtags::paramstack) }; + } + return ''; +} + +my @randomseeds; +sub pushrandomnumber { + my $rand_alg=&Apache::lonnet::get_rand_alg(); + if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' || + $rand_alg eq '64bit2') { + # do nothing + } else { + my @seed=&Math::Random::random_get_seed(); + push (@randomseeds,\@seed); + } + &Apache::response::setrandomnumber(); +} +sub poprandomnumber { + my $rand_alg=&Apache::lonnet::get_rand_alg(); + if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' || + $rand_alg eq '64bit2') { + return; + } + my $seed=pop(@randomseeds); + if ($seed) { + &Math::Random::random_set_seed(@$seed); + } else { + &Apache::lonxml::error("Unable to restore random algorithm."); + } +} + +sub setrandomnumber { + my $rndseed; + $rndseed=&Apache::structuretags::setup_rndseed(); + if (!defined($rndseed)) { $rndseed=&Apache::lonnet::rndseed(); } + &Apache::lonxml::debug("randseed $rndseed"); + # $rndseed=unpack("%32i",$rndseed); + my $rand_alg=&Apache::lonnet::get_rand_alg(); + my $rndmod; + + my ($id1,$id2,$shift_amt); + if ($Apache::lonhomework::parsing_a_problem) { + $id1=$Apache::inputtags::part; + if (defined($Apache::inputtags::response[-1])) { + $id2=$Apache::inputtags::response[-1]; + } + $shift_amt=scalar(@Apache::inputtags::responselist); + } elsif ($Apache::lonhomework::parsing_a_task) { + $id1=$Apache::bridgetask::dimension; + if (defined($Apache::bridgetask::instance[-1])) { + $id2=$Apache::bridgetask::instance[-1]; + } + $shift_amt=scalar(@Apache::bridgetask::instance); + } + &Apache::lonxml::debug("id1: $id1, id2: $id2, shift_amt: $shift_amt"); + if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' || + $rand_alg eq '64bit2') { + $rndmod=(&Apache::lonnet::numval($id1) << 10); + if (defined($id2)) { $rndmod+=&Apache::lonnet::numval($id2); } + } elsif ($rand_alg eq '64bit3') { + $rndmod=(&Apache::lonnet::numval2($id1) << 10); + if (defined($id2)) { $rndmod+=&Apache::lonnet::numval2($id2); } + } else { + my $shift=(4*$shift_amt)%30; + $rndmod=(&Apache::lonnet::numval3($id1) << (($shift+15)%30)); + if (defined($id2)) { + $rndmod+=(&Apache::lonnet::numval3($id2) << $shift ); + } + } + if ($rndseed =~/([,:])/) { + my $char=$1; + use integer; + my ($num1,$num2)=split(/\Q$char\E/,$rndseed); + $num1+=$rndmod; + $num2+=$rndmod; + if($Apache::lonnet::_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); } + $rndseed=$num1.$char.$num2; + } else { + $rndseed+=$rndmod; + if($Apache::lonnet::_64bit) { + use integer; + $rndseed=(($rndseed<<32)>>32); + } + } + &Apache::lonxml::debug("randseed $rndmod $rndseed"); + &Apache::lonnet::setup_random_from_rndseed($rndseed); + return ''; +} + +sub meta_parameter_write { + my ($name,$type,$default,$display)=@_; + my $partref=$Apache::inputtags::part; + my $result='' + ."\n"; + return $result; +} + +sub meta_package_write { + my $name=shift; + my $result = ''."\n"; + return $result; +} + +sub meta_stores_write { + my ($name,$type,$display)=@_; + my $partref=$Apache::inputtags::part; + my $result = '\n"; +} + +sub mandatory_part_meta { +# +# Autogenerate metadata for mandatory +# input (from RAT or lonparmset) and +# output (to lonspreadsheet) +# of each part +# + return +# &meta_parameter_write('opendate','date_start','', +# 'Opening Date'). +# &meta_parameter_write('duedate','date_end','', +# 'Due Date'). +# &meta_parameter_write('answerdate','date_start','', +# 'Show Answer Date'). +# &meta_parameter_write('weight','int_zeropos','', +# 'Available Points'). +# &meta_parameter_write('maxtries','int_pos','', +# 'Maximum Number of Tries'). + &meta_package_write('part'). + &meta_stores_write('solved','string', + 'Problem Status'). + &meta_stores_write('tries','int_zeropos', + 'Number of Attempts'). + &meta_stores_write('awarded','float', + 'Partial Credit Factor'); +# +# Note: responseid-specific data 'submission' and 'awarddetail' +# not available to spreadsheet -> skip here +# +} + +sub meta_part_order { + if (@Apache::inputtags::partlist) { + my @parts=@Apache::inputtags::partlist; + shift(@parts); + return ''.join(',',@parts).''."\n"; + } else { + return '0'."\n"; + } +} + +sub meta_response_order { + if (@Apache::inputtags::responselist) { + return ''.join(',',@Apache::inputtags::responselist). + ''."\n"; + } +} + +sub check_for_previous { + my ($curresponse,$partid,$id) = @_; + my %previous; + $previous{'used'} = 0; + foreach my $key (sort(keys(%Apache::lonhomework::history))) { + if ($key =~ /resource\.$partid\.$id\.submission$/) { + &Apache::lonxml::debug("Trying $key"); + my $pastresponse=$Apache::lonhomework::history{$key}; + if ($pastresponse eq $curresponse) { + $previous{'used'} = 1; + my $history; + if ( $key =~ /^(\d+):/ ) { + $history=$1; + $previous{'award'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"}; + $previous{'last'}='0'; + push(@{ $previous{'version'} },$history); + } else { + $previous{'award'} = $Apache::lonhomework::history{"resource.$partid.$id.awarddetail"}; + $previous{'last'}='1'; + } + if (! $previous{'award'} ) { $previous{'award'} = 'UNKNOWN'; } + &Apache::lonxml::debug("got a match :$previous{'award'}:$previous{'used'}:"); + } + } + } + &Apache::lonhomework::showhash(%previous); + return %previous; +} + +sub handle_previous { + my ($previous,$ad)=@_; + if ($$previous{'used'} && ($$previous{'award'} eq $ad) ) { + if ($$previous{'last'}) { + push(@Apache::inputtags::previous,'PREVIOUSLY_LAST'); + push(@Apache::inputtags::previous_version,$$previous{'version'}); + } elsif ($Apache::lonhomework::type ne 'survey') { + push(@Apache::inputtags::previous,'PREVIOUSLY_USED'); + push(@Apache::inputtags::previous_version,$$previous{'version'}); + } + } +} + +sub view_or_modify { + my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser(); + my $myself=0; + if ( ($name eq $env{'user.name'}) && ($domain eq $env{'user.domain'}) ) { + $myself=1; + } + my $vgr=&Apache::lonnet::allowed('vgr',$courseid); + my $mgr=&Apache::lonnet::allowed('vgr',$courseid); + if ($mgr) { return "M"; } + if ($vgr) { return "V"; } + if ($myself) { return "V"; } + return ''; +} + +sub start_dataresponse { + my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; + my $id = &Apache::response::start_response($parstack,$safeeval); + my $result; + if ($target eq 'web') { + $result = $token->[2]->{'display'}.':'; + } elsif ($target eq 'meta') { + $result = &Apache::response::meta_stores_write($token->[2]->{'name'}, + $token->[2]->{'type'}, + $token->[2]->{'display'}); + $result .= &Apache::response::meta_package_write('dataresponse'); + } + return $result; +} + +sub end_dataresponse { + my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; + my $result; + if ( $target eq 'web' ) { + } elsif ($target eq 'grade' ) { + if ( defined $env{'form.submitted'}) { + my ($symb,$courseid,$domain,$name)=&Apache::lonxml::whichuser(); + my $allowed=&Apache::lonnet::allowed('mgr',$courseid); + if ($allowed) { + &Apache::response::setup_params('dataresponse',$safeeval); + my $partid = $Apache::inputtags::part; + my $id = $Apache::inputtags::response['-1']; + my $response = $env{'form.HWVAL_'.$id}; + my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval); + if ( $response =~ /[^\s]/) { + $Apache::lonhomework::results{"resource.$partid.$id.$name"}=$response; + $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response; + $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}='SUBMITTED'; + } + } else { + $result='Not Permitted to change values.' + } + } + } + &Apache::response::end_response; + return $result; +} + +sub decide_package { + my ($tagstack)=@_; + my $package; + if ($$tagstack[-1] eq 'parameter') { + $package='part'; + } else { + my $i=-1; + while (defined($$tagstack[$i])) { + if ($$tagstack[$i] =~ /(response|hint)$/) { + $package=$$tagstack[$i]; + last; + } + $i--; + } + } + return $package; } sub start_responseparam { - my ($target,$token,$parstack,$parser,$safeeval)=@_; - my $args=''; - if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; } - my $default = &Apache::run::run("{$args;".'return $default}',$safeeval); - my $name = &Apache::run::run("{$args;".'return $name}',$safeeval); - &Apache::lonxml::debug("looking for resource.$Apache::inputtags::part['-1'].$name"); - my $value = &Apache::lonnet::EXT("resource.$Apache::inputtags::part['-1'].$name"); - &Apache::lonxml::debug("$name has value :$value: and default :$default:"); - if (!$value) { - $Apache::inputtags::params{$name}=$default; - } else { - $Apache::inputtags::params{$name}=$value; - } - return ''; + my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; + my $result=''; + if ($target eq 'meta') { + $result = &meta_parameter_write($token->[2]->{'name'}, + $token->[2]->{'type'}, + $token->[2]->{'default'}, + $token->[2]->{'description'}); + } elsif ($target eq 'edit') { + $result.=&Apache::edit::tag_start($target,$token); + my $optionlist; + my $package=&decide_package($tagstack); + foreach my $key (sort(keys(%Apache::lonnet::packagetab))) { + if ($key =~ /^\Q$package\E&(.*)&display$/) { + $optionlist.=''; + } + } + if (defined($optionlist)) { + $result.='Use template:
'; + } + $result.=&Apache::edit::text_arg('Name:','name',$token). + &Apache::edit::text_arg('Type:','type',$token). + &Apache::edit::text_arg('Description:','description',$token). + &Apache::edit::text_arg('Default:','default',$token). + ""; + $result.=&Apache::edit::end_table; + } elsif ($target eq 'modified') { + my $constructtag=&Apache::edit::get_new_args($token,$parstack, + $safeeval,'name','type', + 'description','default'); + my $element=&Apache::edit::html_element_name('parameter_package'); + if (defined($env{"form.$element"}) && $env{"form.$element"} ne '') { + my $name=$env{"form.$element"}; + my $tag=&decide_package($tagstack); + $token->[2]->{'name'}=$name; + $token->[2]->{'type'}= + $Apache::lonnet::packagetab{"$tag&$name&type"}; + $token->[2]->{'description'}= + $Apache::lonnet::packagetab{"$tag&$name&display"}; + $token->[2]->{'default'}= + $Apache::lonnet::packagetab{"$tag&$name&default"}; + $constructtag=1; + } + if ($constructtag) { + $result = &Apache::edit::rebuild_tag($token); + $result.=&Apache::edit::handle_insert(); + } + } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' || + $target eq 'tex' || $target eq 'analyze' ) { + if ($env{'request.state'} eq 'construct') { + my $name =&Apache::lonxml::get_param('name',$parstack,$safeeval); + my $default=&Apache::lonxml::get_param('default',$parstack, + $safeeval); + if ($name) {$Apache::inputtags::params{$name}=$default;} + } + } + return $result; } sub end_responseparam { + my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; + if ($target eq 'edit') { return ('','no'); } + return ''; +} + +sub start_parameter { + return &start_responseparam(@_); +} + +sub end_parameter { + return &end_responseparam(@_); +} + +sub reset_params { + %Apache::inputtags::params=(); +} + +sub setup_params { + my ($tag,$safeeval) = @_; + + if ($env{'request.state'} eq 'construct') { return; } + my %paramlist=(); + foreach my $key (keys(%Apache::lonnet::packagetab)) { + if ($key =~ /^$tag/) { + my ($package,$name) = split(/&/,$key); + $paramlist{$name}=1; + } + } + foreach my $key (keys(%paramlist)) { + my $entry= 'resource.'.$Apache::inputtags::part; + if (defined($Apache::inputtags::response[-1])) { + $entry.='_'.$Apache::inputtags::response[-1]; + } + $entry.='.'.$key; + &Apache::lonxml::debug("looking for $entry"); + my $value = &Apache::lonnet::EXT("$entry"); + &Apache::lonxml::debug("$key has value :$value:"); + if ($value eq 'con_lost' || $value =~ /^error:/) { + &Apache::lonxml::debug("using nothing"); + $Apache::inputtags::params{$key}=''; + } else { + my $string="{return qq\0".$value."\0}"; + my $newvalue=&Apache::run::run($string,$safeeval,1); + if (defined($newvalue)) { $value=$newvalue; } + $Apache::inputtags::params{$key}=$value; + } + } +} + +sub answer_header { + my ($type) = @_; + my $result; + if ($env{'form.answer_output_mode'} eq 'tex') { + $result = ' \vskip 0 mm \begin{tabular}{|c|}\hline Answer for Part: \verb|'. + $Apache::inputtags::part.'| \\\\ \hline '; + } else { + $result = ''."\n"; + } + return $result; +} + +sub answer_part { + my ($type,$answer) = @_; + my $result; + if ($env{'form.answer_output_mode'} eq 'tex') { + $result = ' \verb|'.$answer.'|\\\\ \hline '; + } else { + $result = ''; + } + return $result; +} + +sub answer_footer { + my ($type) = @_; + my $result; + if ($env{'form.answer_output_mode'} eq 'tex') { + $result = ' \end{tabular} \vskip 0 mm '; + } else { + $result = '
Answer for Part:'. + $Apache::inputtags::part. ''.$answer.'
'; + } + return $result; +} + +sub showallfoils { + if (defined($env{'form.showallfoils'})) { + my ($symb)=&Apache::lonxml::whichuser(); + if (($env{'request.state'} eq 'construct') || + ($env{'user.adv'} && $symb eq '') || + ($Apache::lonhomework::viewgrades) ) { + return 1; + } + } + if ($Apache::lonhomework::type eq 'survey') { return 1; } + return 0; +} + +sub getresponse { + my ($temp,$resulttype)=@_; + my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1']; + my $response; + if (!defined($temp)) { + $temp=1; + } else { + $formparm.=":$temp"; + } + my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7, + 'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14, + 'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21, + 'W'=>22,'X'=>23,'Y'=>24,'Z'=>25); + if ($env{'form.submitted'} eq 'scantron') { + my $part = $Apache::inputtags::part; + my $id = $Apache::inputtags::response[-1]; + $response = $env{'scantron.'.($Apache::lonxml::counter+$temp-1). + '.answer'}; + # save bubbled letter for later + $Apache::lonhomework::results{"resource.$part.$id.scantron"}.= + $response; + if ($resulttype ne 'letter') { + if ($resulttype eq 'A is 1') { + $response = $let_to_num{$response}+1; + } else { + $response = $let_to_num{$response}; + } + } + } else { + $response = $env{$formparm}; + } + return $response; +} + +sub repetition { + my $id = $Apache::inputtags::part; + my $weight = &Apache::lonnet::EXT("resource.$id.weight"); + if (!defined($weight) || ($weight eq '')) { $weight=1; } + my $repetition = int $weight/9; + if ($weight % 9 != 0) {$repetition++;} + return $repetition; +} + +sub scored_response { + my ($part,$id)=@_; + my $repetition=&repetition(); + my $score=0; + for (my $i=0;$i<$repetition;$i++) { + my $increase=&Apache::response::getresponse($i+1); + if ($increase ne '') { $score+=$increase+1; } + } + my $weight = &Apache::lonnet::EXT("resource.$part.weight"); + if (!defined($weight) || $weight eq '' || $weight eq 0) { $weight = 1; } + my $pcr=$score/$weight; + $Apache::lonhomework::results{"resource.$part.$id.awarded"}=$pcr; + $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}= + 'ASSIGNED_SCORE'; + return $repetition; +} + +sub whichorder { + my ($max,$randomize,$showall,$hash)=@_; + #&Apache::lonxml::debug("man $max randomize $randomize"); + if (!defined(@{ $$hash{'names'} })) { return; } + my @names = @{ $$hash{'names'} }; + my @whichopt =(); + my (%top,@toplist,%bottom,@bottomlist); + if (!($showall || ($randomize eq 'no'))) { + my $current=0; + foreach my $name (@names) { + $current++; + if ($$hash{"$name.location"} eq 'top') { + $top{$name}=$current; + } elsif ($$hash{"$name.location"} eq 'bottom') { + $bottom{$name}=$current; + } + } + } + my $topcount=0; + my $bottomcount=0; + while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall) + && ($#names > -1)) { + #&Apache::lonxml::debug("Have $#whichopt max is $max"); + my $aopt; + if ($showall || ($randomize eq 'no')) { + $aopt=0; + } else { + $aopt=int(&Math::Random::random_uniform() * ($#names+1)); + } + #&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt"); + $aopt=splice(@names,$aopt,1); + #&Apache::lonxml::debug("Picked $aopt"); + if ($top{$aopt}) { + $toplist[$top{$aopt}]=$aopt; + $topcount++; + } elsif ($bottom{$aopt}) { + $bottomlist[$bottom{$aopt}]=$aopt; + $bottomcount++; + } else { + push (@whichopt,$aopt); + } + } + for (my $i=0;$i<=$#toplist;$i++) { + if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) } + } + for (my $i=0;$i<=$#bottomlist;$i++) { + if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) } + } + return @whichopt; +} + +sub show_answer { + my $part = $Apache::inputtags::part; + my $award = $Apache::lonhomework::history{"resource.$part.solved"}; + my $status = $Apache::inputtags::status[-1]; + return ( ($award =~ /^correct/ + && lc($Apache::lonhomework::problemstatus) ne 'no') + || $status eq "SHOW_ANSWER"); +} + +sub analyze_store_foilgroup { + my ($shown,$attrs)=@_; + my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]"; + foreach my $name (@{ $Apache::response::foilgroup{'names'} }) { + if (defined($Apache::lonhomework::analyze{"$part_id.foil.value.$name"})) { next; } + push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },$name); + foreach my $attr (@$attrs) { + $Apache::lonhomework::analyze{"$part_id.foil.".$attr.".$name"} = + $Apache::response::foilgroup{"$name.".$attr}; + } + } + push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} }, @{ $shown }); +} + +sub check_if_computed { + my ($token,$parstack,$safeeval,$name)=@_; + my $value = &Apache::lonxml::get_param($name,$parstack,$safeeval); + if (ref($token->[2]) eq 'HASH' && $value ne $token->[2]{$name}) { + my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]"; + $Apache::lonhomework::analyze{"$part_id.answercomputed"} = 1; + } +} + +sub pick_foil_for_concept { + my ($target,$attrs,$hinthash,$parstack,$safeeval)=@_; + if (not defined(@{ $Apache::response::conceptgroup{'names'} })) { return; } + my @names = @{ $Apache::response::conceptgroup{'names'} }; + my $pick=int(&Math::Random::random_uniform() * ($#names+1)); + my $name=$names[$pick]; + push @{ $Apache::response::foilgroup{'names'} }, $name; + foreach my $attr (@$attrs) { + $Apache::response::foilgroup{"$name.".$attr} = + $Apache::response::conceptgroup{"$name.".$attr}; + } + my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval); + $Apache::response::foilgroup{"$name.concept"} = $concept; + &Apache::lonxml::debug("Selecting $name in $concept"); + my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]"; + if ($target eq 'analyze') { + push (@{ $Apache::lonhomework::analyze{"$part_id.concepts"} }, + $concept); + $Apache::lonhomework::analyze{"$part_id.concept.$concept"}= + $Apache::response::conceptgroup{'names'}; + foreach my $name (@{ $Apache::response::conceptgroup{'names'} }) { + push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} }, + $name); + foreach my $attr (@$attrs) { + $Apache::lonhomework::analyze{"$part_id.foil.$attr.$name"}= + $Apache::response::conceptgroup{"$name.$attr"}; + } + } + } + push(@{ $hinthash->{"$part_id.concepts"} },$concept); + $hinthash->{"$part_id.concept.$concept"}= + $Apache::response::conceptgroup{'names'}; + +} + +sub get_response_param { + my ($id,$name,$default)=@_; + my $parameter; + if ($env{'request.state'} eq 'construct' && + defined($Apache::inputtags::params{$name})) { + $parameter=$Apache::inputtags::params{$name}; + } else { + $parameter=&Apache::lonnet::EXT("resource.$id.$name"); + } + if (!defined($parameter) || $parameter eq '') { + $parameter = $default; + } + return $parameter; +} + +sub submitted { + my ($who)=@_; + + # when scatron grading any submission is a submission + if ($env{'form.submitted'} eq 'scantron') { return 1; } + # if the caller only cared if this was a scantron submission + if ($who eq 'scantron') { return 0; } + # if the Submit Answer button for this particular part was pressed + my $partid=$Apache::inputtags::part; + if (defined($env{'form.submit_'.$partid})) { return 1; } + # Submit All button on a .page was pressed + if (defined($env{'form.all_submit'})) { return 1; } + # otherwise no submission occured + return 0; +} + +# basically undef and 0 (both false) mean that they still have work to do +# and all true values mean that they can't do any more work +# +# a return of undef means it is unattempted +# a return of 0 means it is attmpted and wrong but still has tries +# a return of 1 means it is marked correct +# a return of 2 means they have exceed maximum number of tries +# a return of 3 means it after the answer date +sub check_status { + my ($id)=@_; + if (!$id) { $id=$Apache::linputtags::part; } + my $curtime=&Apache::lonnet::EXT('system.time'); + my $opendate=&Apache::lonnet::EXT("resource.$id.opendate"); + my $duedate=&Apache::lonnet::EXT("resource.$id.duedate"); + my $answerdate=&Apache::lonnet::EXT("resource.$id.answerdate"); + if ( $opendate && $curtime > $opendate && + $duedate && $curtime > $duedate && + $answerdate && $curtime > $answerdate) { + return 3; + } + my $status=&Apache::lonnet::EXT("user.resource.resource.$id.solved"); + if ($status =~ /^correct/) { return 1; } + if (!$status) { return undef; } + my $maxtries=&Apache::lonnet::EXT("resource.$id.maxtries"); + if ($maxtries eq '') { $maxtries=2; } + my $curtries=&Apache::lonnet::EXT("user.resource.resource.$id.tries"); + if ($curtries < $maxtries) { return 0; } + return 2; } 1;