# The LearningOnline Network with CAPA
# various response type definitons response definition
#
# $Id: response.pm,v 1.251 2024/12/25 02:31:06 raeburn 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/
#
=pod
=head1 NAME
Apache::response.pm
=head1 SYNOPSIS
This is part of the LearningOnline Network with CAPA project
described at http://www.lon-capa.org.
=head1 NOTABLE SUBROUTINES
=over
=item
=back
=cut
package Apache::response;
use strict;
use Apache::lonlocal;
use Apache::lonnet;
use Apache::inputtags();
use Apache::lonmaxima();
use Apache::lonr();
use Apache::lontexconvert();
BEGIN {
&Apache::lonxml::register('Apache::response',('responseparam','parameter','dataresponse','customresponse','mathresponse'));
}
sub start_response {
my ($parstack,$safeeval)=@_;
my $id = &Apache::lonxml::get_id($parstack,$safeeval);
if ($#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 '' &&
!$Apache::lonhomework::ignore_response_errors) {
&Apache::lonxml::error(&HTML::Entities::encode(&mt("Found a <*response> outside of a <part> in a <part>ed problem"),'<>&"'));
}
if ($Apache::inputtags::response_with_no_part &&
$Apache::inputtags::part ne '0') {
&Apache::lonxml::error(&HTML::Entities::encode(&mt("<*response>s are both inside of <part> and outside of <part>, this is not a valid problem, errors in grading may occur."),'<>&"').'<br />');
}
if ($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 $id = &Apache::lonxml::get_id($parstack,$safeeval);
push (@Apache::inputtags::hint,$id);
push (@Apache::inputtags::hintlist,$id);
push (@Apache::inputtags::paramstack,[%Apache::inputtags::params]);
return $id;
}
sub end_hintresponse {
pop @Apache::inputtags::hint;
if (defined($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(@$seed);
} else {
&Apache::lonxml::error("Unable to restore random algorithm.");
}
}
sub setrandomnumber {
my ($ignore_id2,$target,$rndseed) = @_;
if (!defined($rndseed)) {
$rndseed=&Apache::structuretags::setup_rndseed(undef,$target);
}
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,$rndmod2);
my ($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) {
$id1=&Apache::bridgetask::get_dim_id();
if (!$ignore_id2 && ref($Apache::bridgetask::instance{$id1})) {
$id2=$Apache::bridgetask::instance{$id1}[-1];
$shift_amt=scalar(@{$Apache::bridgetask::instance{$id1}});
} else {
$shift_amt=0;
}
}
&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); }
} elsif ($rand_alg eq '64bit4') {
my $shift=(4*$shift_amt)%30;
$rndmod=(&Apache::lonnet::numval3($id1) << (($shift+15)%30));
if (defined($id2)) {
$rndmod+=(&Apache::lonnet::numval3($id2) << $shift );
}
} else {
($rndmod,$rndmod2)=&Apache::lonnet::digest("$id1,$id2");
}
if ($rndseed =~/([,:])/) {
my $char=$1;
use integer;
my ($num1,$num2)=split(/\Q$char\E/,$rndseed);
$num1+=$rndmod;
$num2+= ((defined($rndmod2)) ? $rndmod2 : $rndmod);
if($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 $result='<parameter part="'.$Apache::inputtags::part.'"';
if (defined($Apache::inputtags::response[-1])) {
$result.= ' id="'.$Apache::inputtags::response[-1].'"';
$partref.='_'.$Apache::inputtags::response[-1];
}
$result.= ' name="'.$name.'"'.
' type="'.$type.'"'.
(defined($default)?' default="'.$default.'"':'').
(defined($display)?' display="'.$display.' [Part: '.$partref.']"':'')
.'></parameter>'
."\n";
return $result;
}
sub meta_package_write {
my $name=shift;
my $result = '<parameter part="'.$Apache::inputtags::part.'"';
if(defined($Apache::inputtags::response[-1])) {
$result.= ' id="'.$Apache::inputtags::response[-1].'"';
}
$result.=' package="'.$name.'"></parameter>'."\n";
return $result;
}
sub meta_stores_write {
my ($name,$type,$display)=@_;
my $partref=$Apache::inputtags::part;
my $result = '<stores part="'.$Apache::inputtags::part.'"';
if (defined($Apache::inputtags::response[-1])) {
$result.= ' id="'.$Apache::inputtags::response[-1].'"';
$partref.='_'.$Apache::inputtags::response[-1];
}
$result.= ' name="'.$name.'"'.
' type="'.$type.'"'.
' display="'.$display.' [Part: '.$partref.']"'.
"></stores>\n";
}
=pod
=item mandatory_part_meta()
Autogenerate metadata for mandatory
input (from RAT or lonparmset) and
output (to lonspreadsheet)
of each part
Note: responseid-specific data 'submission' and 'awarddetail'
not available to spreadsheet -> skip here
=cut
sub mandatory_part_meta {
return &meta_package_write('part').
&meta_stores_write('solved','string','Problem Status').
&meta_stores_write('tries','int_zeropos','Number of Attempts').
&meta_stores_write('awarded','float','Partial Credit Factor');
}
sub meta_part_order {
my ($type) = @_;
if (@Apache::inputtags::partlist) {
my @parts=@Apache::inputtags::partlist;
unless ($type eq 'library') {
shift(@parts);
}
return '<partorder>'.join(',',@parts).'</partorder>'."\n";
} elsif ($type eq 'library') {
return '<partorder></partorder>'."\n";
} else {
return '<partorder>0</partorder>'."\n";
}
}
sub meta_response_order {
if (@Apache::inputtags::responselist) {
return '<responseorder>'.join(',',@Apache::inputtags::responselist).
'</responseorder>'."\n";
}
}
sub check_for_previous {
my ($curresponse,$partid,$id,$last,$type) = @_;
my %previous;
$previous{'used'} = 0;
my $questiontype = $Apache::lonhomework::type;
my $curr_rndseed = $env{'form.'.$partid.'.rndseed'};
foreach my $key (sort(keys(%Apache::lonhomework::history))) {
if ($key =~ /resource\.\Q$partid\E\.\Q$id\E\.submission$/) {
if ( $last && $key =~ /^(\d+):/ ) {
next if ($1 >= $last);
}
&Apache::lonxml::debug("Trying $key");
my $pastresponse=$Apache::lonhomework::history{$key};
if ($pastresponse eq $curresponse) {
my $history;
if ( $key =~ /^(\d+):/ ) {
$history=$1;
next if ((($questiontype eq 'randomizetry') ||
($Apache::lonhomework::history{"$history:resource.$partid.type"} eq 'randomizetry')) &&
($curr_rndseed ne $Apache::lonhomework::history{"$history:resource.$partid.rndseed"}));
$previous{'award'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
$previous{'last'}='0';
push(@{ $previous{'version'} },$history);
} else {
next if ((($questiontype eq 'randomizetry') ||
($Apache::lonhomework::history{"resource.$partid.type"} eq 'randomizetry')) &&
($curr_rndseed ne $Apache::lonhomework::history{"resource.$partid.rndseed"}));
$previous{'award'} = $Apache::lonhomework::history{"resource.$partid.$id.awarddetail"};
$previous{'last'}='1';
}
$previous{'used'} = 1;
if (! $previous{'award'} ) { $previous{'award'} = 'UNKNOWN'; }
if ($previous{'award'} eq 'INTERNAL_ERROR') { $previous{'used'}=0; }
&Apache::lonxml::debug("got a match :$previous{'award'}:$previous{'used'}:");
} elsif ($type eq 'ci') {
if (lc($pastresponse) eq lc($curresponse)) {
if ($key =~ /^(\d+):/) {
my $history = $1;
next if (($questiontype eq 'randomizetry') &&
($curr_rndseed ne $Apache::lonhomework::history{"$history:resource.$partid.rndseed"}));
push (@{$previous{'versionci'}},$history);
$previous{'awardci'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
$previous{'usedci'} = 1;
}
}
}
}
}
&Apache::lonhomework::showhash(%previous);
return %previous;
}
sub handle_previous {
my ($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 (($Apache::lonhomework::type ne 'survey') &&
($Apache::lonhomework::type ne 'surveycred') &&
($Apache::lonhomework::type ne 'anonsurvey') &&
($Apache::lonhomework::type ne 'anonsurveycred')) {
push(@Apache::inputtags::previous,'PREVIOUSLY_USED');
push(@Apache::inputtags::previous_version,$$previous{'version'});
}
}
}
sub view_or_modify {
my ($symb,$courseid,$domain,$name) = &Apache::lonnet::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::lonnet::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=&mt('Not Permitted to change values');
}
}
}
&Apache::response::end_response;
return $result;
}
sub start_customresponse {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $id = &Apache::response::start_response($parstack,$safeeval);
push(@Apache::lonxml::namespace,'customresponse');
my $result;
@Apache::response::custom_answer=();
@Apache::response::custom_answer_type=();
&Apache::lonxml::register('Apache::response',('answer'));
if ($target eq 'web') {
if ( &Apache::response::show_answer() ) {
my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
$safeeval);
$Apache::inputtags::answertxt{$id}=[$answer];
}
} elsif ($target eq 'edit') {
$result.=&Apache::edit::tag_start($target,$token);
$result.=&Apache::edit::text_arg('String to display for answer:',
'answerdisplay',$token,'50');
$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
} elsif ($target eq 'modified') {
my $constructtag;
$constructtag=&Apache::edit::get_new_args($token,$parstack,
$safeeval,'answerdisplay');
if ($constructtag) {
$result = &Apache::edit::rebuild_tag($token);
}
} elsif ($target eq 'answer' || $target eq 'grade') {
&Apache::response::reset_params();
} elsif ($target eq 'meta') {
$result .= &Apache::response::meta_package_write('customresponse');
}
return $result;
}
sub end_customresponse {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $result;
my $part=$Apache::inputtags::part;
my $id=$Apache::inputtags::response[-1];
if ( $target eq 'grade' && &Apache::response::submitted() ) {
my $response = &Apache::response::getresponse();
if ($Apache::lonhomework::type eq 'exam' ||
&Apache::response::submitted('scantron')) {
&Apache::response::scored_response($part,$id);
} elsif ( $response =~ /[^\s]/ &&
$Apache::response::custom_answer_type[-1] eq 'loncapa/perl') {
if (!$Apache::lonxml::default_homework_loaded) {
&Apache::lonxml::default_homework_load($safeeval);
}
my %previous = &Apache::response::check_for_previous($response,
$part,$id);
$Apache::lonhomework::results{"resource.$part.$id.submission"}=
$response;
my $error;
${$safeeval->varglob('LONCAPA::customresponse_submission')}=
$response;
my ($award,$score) = &Apache::run::run('{ my $submission=$LONCAPA::customresponse_submission;'.$Apache::response::custom_answer[-1].'}',$safeeval);
if (!&Apache::inputtags::valid_award($award)) {
$error = $award;
$award = 'ERROR';
}
if (($award eq 'INCORRECT') || ($award eq 'APPROX_ANS') ||
($award eq 'EXACT_ANS') || ($award eq 'ASSIGNED_SCORE')) {
if ($Apache::lonhomework::type eq 'survey') {
$award='SUBMITTED';
} elsif ($Apache::lonhomework::type eq 'surveycred') {
$award='SUBMITTED_CREDIT';
} elsif ($Apache::lonhomework::type eq 'anonsurvey') {
$award='ANONYMOUS';
} elsif ($Apache::lonhomework::type eq 'anonsurveycred') {
$award='ANONYMOUS_CREDIT';
}
}
&Apache::response::handle_previous(\%previous,$award);
$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
$award;
if ($award eq 'ASSIGNED_SCORE') {
$Apache::lonhomework::results{"resource.$part.$id.awarded"}=1.0*$score;
}
if ($error) {
$Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
$error;
}
}
} elsif ( $target eq 'answer') {
$result = &Apache::response::answer_header('customresponse');
my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
$safeeval);
if ($env{'form.answer_output_mode'} ne 'tex') {
$answer = '<b>'.$answer.'</b>';
}
$result .= &Apache::response::answer_part('customresponse',$answer);
$result .= &Apache::response::answer_footer('customresponse');
}
if ($target eq 'web') {
&setup_prior_tries_hash(\&format_prior_response_custom);
}
if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
$target eq 'tex' || $target eq 'analyze') {
my $repetition = &repetition();
&Apache::lonxml::increment_counter($repetition,"$part.$id");
if ($target eq 'analyze') {
$Apache::lonhomework::analyze{"$part.$id.type"} = 'customresponse';
&Apache::lonhomework::set_bubble_lines();
}
}
if ($target eq 'web') {
&setup_prior_tries_hash(\&format_prior_response_math);
}
pop(@Apache::lonxml::namespace);
pop(@Apache::response::custom_answer);
pop(@Apache::response::custom_answer_type);
&Apache::lonxml::deregister('Apache::response',('answer'));
&Apache::response::end_response();
return $result;
}
sub format_prior_response_custom {
my ($mode,$answer) =@_;
if (ref($answer) eq 'ARRAY') {
$answer = '('.join(', ', @{ $answer }).')';
}
return '<span class="LC_prior_custom">'.
&HTML::Entities::encode($answer,'"<>&').'</span>';
}
sub start_mathresponse {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $id = &Apache::response::start_response($parstack,$safeeval);
push(@Apache::lonxml::namespace,'mathresponse');
my $result;
@Apache::response::custom_answer=();
@Apache::response::custom_answer_type=();
&Apache::lonxml::register('Apache::response',('answer'));
if ($target eq 'web') {
if ( &Apache::response::show_answer() ) {
my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
$safeeval);
$Apache::inputtags::answertxt{$id}=[$answer];
}
} elsif ($target eq 'edit') {
$result.=&Apache::edit::tag_start($target,$token);
$result.=&Apache::edit::text_arg('String to display for answer:',
'answerdisplay',$token,'50');
$result.=&Apache::edit::select_arg('Algebra System:',
'cas',
['maxima','R'],
$token);
$result.=&Apache::edit::text_arg('Argument Array:',
'args',$token).
&Apache::loncommon::help_open_topic('Maxima_Argument_Array');
$result.=&Apache::edit::text_arg('Libraries:',
'libraries',$token).
&Apache::loncommon::help_open_topic('Maxima_Libraries');
$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
} elsif ($target eq 'modified') {
my $constructtag;
$constructtag=&Apache::edit::get_new_args($token,$parstack,
$safeeval,'answerdisplay','cas','args','libraries');
if ($constructtag) {
$result = &Apache::edit::rebuild_tag($token);
}
} elsif ($target eq 'answer' || $target eq 'grade') {
&Apache::response::reset_params();
} elsif ($target eq 'meta') {
$result .= &Apache::response::meta_package_write('mathresponse');
}
return $result;
}
sub end_mathresponse {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $result;
my $part=$Apache::inputtags::part;
my $id=$Apache::inputtags::response[-1];
if ( $target eq 'grade' && &Apache::response::submitted() ) {
my $response = &Apache::response::getresponse();
if ( $response =~ /[^\s]/ ) {
if (!$Apache::lonxml::default_homework_loaded) {
&Apache::lonxml::default_homework_load($safeeval);
}
my %previous = &Apache::response::check_for_previous($response,
$part,$id);
$Apache::lonhomework::results{"resource.$part.$id.submission"}=
$response;
my $error;
my $award;
my $cas = &Apache::lonxml::get_param('cas',$parstack,$safeeval);
if ($cas eq 'maxima') {
my $args = [&Apache::lonxml::get_param_var('args',$parstack,$safeeval)];
$award=&Apache::lonmaxima::maxima_run($Apache::response::custom_answer[-1],$response,$args,
&Apache::lonxml::get_param('libraries',$parstack,$safeeval));
}
if ($cas eq 'R') {
my $args = [&Apache::lonxml::get_param_var('args',$parstack,$safeeval)];
$award=&Apache::lonr::r_run($Apache::response::custom_answer[-1],$response,$args,
&Apache::lonxml::get_param('libraries',$parstack,$safeeval));
}
if (!&Apache::inputtags::valid_award($award)) {
$error = $award;
$award = 'ERROR';
}
if (($award eq 'INCORRECT' || $award eq 'APPROX_ANS' ||
$award eq 'EXACT_ANS')) {
if ($Apache::lonhomework::type eq 'survey') {
$award='SUBMITTED';
} elsif ($Apache::lonhomework::type eq 'surveycred') {
$award='SUBMITTED_CREDIT';
} elsif ($Apache::lonhomework::type eq 'anonsurvey') {
$award='ANONYMOUS';
} elsif ($Apache::lonhomework::type eq 'anonsurveycred') {
$award='ANONYMOUS_CREDIT';
}
}
&Apache::response::handle_previous(\%previous,$award);
$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
$award;
if ($error) {
$Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
$error;
}
}
}
pop(@Apache::lonxml::namespace);
pop(@Apache::response::custom_answer);
pop(@Apache::response::custom_answer_type);
&Apache::lonxml::deregister('Apache::response',('answer'));
&Apache::response::end_response();
return $result;
}
sub format_prior_response_math {
my ($mode,$answer) =@_;
return '<span class="LC_prior_math">'.
&HTML::Entities::encode($answer,'"<>&').'</span>';
}
sub implicit_multiplication {
my ($expression)=@_;
# Escape scientific notation, so 3e8 does not become 3*e*8
# 3e8 -> 3&8; 3e-8 -> 3&-8; 3E+8 -> e&+8
$expression=~s/(\d+)e([\+\-]*\d+)/$1\&\($2\)/gsi;
# 3x10^8 -> 3&8; 3*10^-8 -> 3&-8
$expression=~s/(\d+)(?:x|\*)10(?:\^|\*\*)([\+\-]*\d+)/$1\&\($2\)/gsi;
# Fill in multiplication signs
# a b -> a*b;3 b -> 3*b;3 4 -> 3*4
$expression=~s/([A-Za-z0-9])\s+(?=[A-Za-z0-9])/$1\*/gs;
# )( -> )*(; ) ( -> )*(
$expression=~s/\)\s*\(/\)\*\(/gs;
# 3a -> 3*a; 3( -> 3*(; 3 ( -> 3*(; 3A -> 3*A
$expression=~s/(\d)\s*([a-zA-Z\(])/$1\*$2/gs;
# a ( -> a*(
$expression=~s/([A-Za-z0-9])\s+\(/$1\*\(/gs;
# )a -> )*a; )3 -> )*3; ) 3 -> )*3
$expression=~s/\)\s*([A-Za-z0-9])/\)\*$1/gs;
# 3&8 -> 3e8; 3&-4 -> 3e-4
$expression=~s/(\d+)\&\(([\+\-]*\d+)\)/$1e$2/gs;
return $expression;
}
sub start_answer {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $result;
push(@Apache::response::custom_answer,
&Apache::lonxml::get_all_text_unbalanced("/answer",$parser));
push(@Apache::response::custom_answer_type,
lc(&Apache::lonxml::get_param('type',$parstack,$safeeval)));
$Apache::response::custom_answer_type[-1] =~ s/\s+//g;
if ($target eq "edit" ) {
$result=&Apache::edit::tag_start($target,$token,'Answer algorithm');
$result.=&Apache::edit::editfield($token->[1],
$Apache::response::custom_answer[-1],
'',80,4);
} elsif ( $target eq "modified" ) {
$result=$token->[4].&Apache::edit::modifiedfield('/answer',$parser);
}
return $result;
}
sub end_answer {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
if ($target eq 'edit' ) {
return &Apache::edit::end_table();
}
}
sub decide_package {
my ($tagstack)=@_;
my $package;
if ($$tagstack[-1] eq 'parameter') {
$package='part';
} else {
my $i=-1;
while (defined($$tagstack[$i])) {
if ($$tagstack[$i] =~ /(response|hint)$/) {
$package=$$tagstack[$i];
last;
}
$i--;
}
}
return $package;
}
sub start_responseparam {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $result='';
if ($target eq 'meta') {
$result = &meta_parameter_write($token->[2]->{'name'},
$token->[2]->{'type'},
$token->[2]->{'default'},
$token->[2]->{'description'});
} elsif ($target eq 'edit') {
$result.=&Apache::edit::tag_start($target,$token);
my $optionlist;
my $package=&decide_package($tagstack);
foreach my $key (sort(keys(%Apache::lonnet::packagetab))) {
if ($key =~ /^\Q$package\E&(.*)&display$/) {
$optionlist.='<option value="'.$1.'">'.
$Apache::lonnet::packagetab{$key}.'</option>';
}
}
if (defined($optionlist)) {
$result.=&mt('Use template:').' <select name="'.
&Apache::edit::html_element_name('parameter_package').'">'.
'<option value=""></option>'.$optionlist.'</select><br />';
}
$result.=&Apache::edit::text_arg('Name:','name',$token).
&Apache::edit::text_arg('Type:','type',$token).
&Apache::edit::text_arg('Description:','description',$token).
&Apache::edit::text_arg('Default:','default',$token).
"</td></tr>";
$result.=&Apache::edit::end_table;
} elsif ($target eq 'modified') {
my $constructtag=&Apache::edit::get_new_args($token,$parstack,
$safeeval,'name','type',
'description','default');
my $element=&Apache::edit::html_element_name('parameter_package');
if (defined($env{"form.$element"}) && $env{"form.$element"} ne '') {
my $name=$env{"form.$element"};
my $tag=&decide_package($tagstack);
$token->[2]->{'name'}=$name;
$token->[2]->{'type'}=
$Apache::lonnet::packagetab{"$tag&$name&type"};
$token->[2]->{'description'}=
$Apache::lonnet::packagetab{"$tag&$name&display"};
$token->[2]->{'default'}=
$Apache::lonnet::packagetab{"$tag&$name&default"};
$token->[3] = ['name','type','description','default'];
$constructtag=1;
}
if ($constructtag) {
$result = &Apache::edit::rebuild_tag($token);
}
} elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
$target eq 'tex' || $target eq 'analyze' ) {
if (($env{'request.state'} eq 'construct') ||
($env{'request.noversionuri'} =~ m{^\Q/res/adm/includes/templates/\E[^/]+\.problem$})) {
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 (($env{'request.state'} eq 'construct') ||
($env{'request.noversionuri'} =~ m{^\Q/res/adm/includes/templates/\E[^/]+\.problem$})) {
return;
}
my %paramlist=();
foreach my $key (keys(%Apache::lonnet::packagetab)) {
if ($key =~ /^\Q$tag\E/) {
my ($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;
}
}
}
{
my @answer_bits;
my $need_row_start;
sub answer_header {
my ($type,$increment,$rows) = @_;
my $result;
if ($env{'form.answer_output_mode'} eq 'tex') {
undef(@answer_bits);
my $bit;
if ($Apache::lonhomework::type eq 'exam') {
$bit = ($Apache::lonxml::counter+$increment).') ';
} else {
$bit .= ' '.&mt('Answer for Part: [_1]',
'\verb|'.$Apache::inputtags::part.'|').' ';
}
push(@answer_bits,$bit);
} else {
my $td = '<td '.(defined($rows)?'rowspan="'.$rows.'"':'').'>';
$result = '<table border="1"><tr>';
if ($Apache::lonhomework::type eq 'exam') {
$result .= $td.($Apache::lonxml::counter+$increment). ')</td>';
} else {
$result .= $td.&mt('Answer for Part: [_1]',
$Apache::inputtags::part).'</td>';
}
$result .= "\n";
$need_row_start = 0;
}
return $result;
}
sub next_answer {
my ($type) = @_;
my $result;
if ($env{'form.answer_output_mode'} eq 'tex') {
# FIXME ... need to do something with tex mode
} else {
$result .= "</tr>";
$need_row_start = 1;
}
return $result;
}
sub answer_part {
my ($type,$answer,$args) = @_;
my $result;
if ($env{'form.answer_output_mode'} eq 'tex') {
if (!$args->{'no_verbatim'}) {
my $to_use='|';
foreach my $value (33..41,43..126) {
my $char=pack('c',$value);
if ($answer !~ /\Q$char\E/) {
$to_use=$char;
last;
}
}
my $fullanswer=$answer;
$answer='';
foreach my $element (split(/[\;]/,$fullanswer)) {
if ($element ne '') {
$answer.= '\verb'.$to_use.$element.$to_use.' \newline';
}
}
}
if ($answer ne '') {
push(@answer_bits,$answer);
}
} else {
if ($need_row_start) {
$result .= '<tr>';
$need_row_start = 0;
}
$result .= '<td>'.$answer.'</td>';
}
return $result;
}
sub answer_footer {
my ($type) = @_;
my $result;
if ($env{'form.answer_output_mode'} eq 'tex') {
$result = ' \vskip 0 mm \noindent \begin{tabular}{|p{1.5cm}|p{6.8cm}|}\hline ';
$result .= $answer_bits[0].'&\vspace*{-4mm}\begin{itemize}';
for (my $i=1;$i<=$#answer_bits;$i++) {
$result.='\item '.$answer_bits[$i].'\vspace*{-7mm}';
}
$result .= ' \end{itemize} \\\\ \hline \end{tabular} \vskip 0 mm ';
} else {
if (!$need_row_start) {
$result .= '</tr>';
}
$result .= '</table>';
}
return $result;
}
}
sub showallfoils {
if (defined($env{'form.showallfoils'})) {
my ($symb)=&Apache::lonnet::whichuser();
if (($env{'request.state'} eq 'construct') ||
($env{'user.adv'} && $symb eq '') ||
($Apache::lonhomework::viewgrades) ) {
return 1;
}
}
if ($Apache::lonhomework::type eq 'survey') { return 1; }
if ($Apache::lonhomework::type eq 'surveycred') { return 1; }
if ($Apache::lonhomework::type eq 'anonsurvey') { return 1; }
if ($Apache::lonhomework::type eq 'anonsurveycred') { return 1; }
return 0;
}
=pod
=item &getresponse();
Retreives the current submitted response, helps out in the case of
scantron mode.
Returns either the exact text of the submission, or a bubbled response
converted to something usable.
Optional Arguments:
$offset - (defaults to 1) if a problem has more than one bubble
response, pass in the number of the bubble wanted, (the
first bubble associated with a problem has an offset of 1,
the second bubble is 2
$resulttype - undef -> a number between 0 and 25
'A is 1' -> a number between 1 and 26
'letter' -> a letter between 'A' and 'Z'
$lines - undef problem only needs a single line of bubbles.
nonzero Problem wants the first nonempty response in
$lines lines of bubbles.
$bubbles_per_line - Must be provided if lines is defined.. number of
bubbles on a line.
=cut
sub getresponse {
my ($offset,$resulttype, $lines, $bubbles_per_line)=@_;
my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
my $response;
if (!defined($offset)) {
$offset=1;
} else {
$formparm.=":$offset";
}
if (!defined($lines)) {
$lines = 1;
}
my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
if ($env{'form.submitted'} eq 'scantron') {
my $part = $Apache::inputtags::part;
my $id = $Apache::inputtags::response[-1];
my $line;
my $startline = $env{'form.scantron_questnum_start.'.$part.'.'.$id};
if (!$startline) {
$startline = $Apache::lonxml::counter;
}
for ($line = 0; $line < $lines; $line++) {
my $theline = $startline+$offset-1+$line;
$response = $env{"scantron.$theline.answer"};
if ((defined($response)) && ($response ne "") && ($response ne " ")) {
last;
}
}
# save bubbled letter for later
$Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
$response;
if ($resulttype ne 'letter') {
$response = $let_to_num{$response};
if ($resulttype eq 'A is 1') {
if ($response ne "") {
$response = $response+1;
}
}
if ($response ne "") {
$response += $line * $bubbles_per_line;
}
} else {
if ($response ne "") {
my $raw = $response;
$response = chr(ord($response) + $line * $bubbles_per_line);
}
}
} else {
$response = $env{$formparm};
}
#
# If we have a nonempty answer, correct the numeric value
# of the answer for the line on which it was found.
#
return $response;
}
=pod
=item &repetition();
In scalar context:
returns: the number of lines that are required to encode the weight.
(Default is for 10 bubbles per bubblesheet item; other (integer)
values can be specified by using a custom Bubblesheet format file
with an eighteenth entry (BubblesPerRow) set to the integer
appropriate for the bubblesheets which will be used to assign weights.
In array context:
returns: number of lines required to encode weight, and bubbles/line.
=cut
sub repetition {
my $id = $Apache::inputtags::part;
my $weight = &Apache::lonnet::EXT("resource.$id.weight");
if (!defined($weight) || ($weight eq '')) { $weight=1; }
my $bubbles_per_row;
if (($env{'form.bubbles_per_row'} =~ /^\d+$/) &&
($env{'form.bubbles_per_row'} > 0)) {
$bubbles_per_row = $env{'form.bubbles_per_row'};
} else {
$bubbles_per_row = 10;
}
my $denominator = $bubbles_per_row;
if (($env{'form.scantron_lastbubblepoints'} == 0) &&
($bubbles_per_row > 1)) {
$denominator = $bubbles_per_row - 1;
}
my $repetition = int($weight/$denominator);
if ($weight % $denominator != 0) { $repetition++; }
if (wantarray) {
return ($repetition,$bubbles_per_row);
}
return $repetition;
}
=pod
=item &scored_response();
Sets the results hash elements
resource.$part_id.$response_id.awarded - to the floating point
number between 0 and 1 that was awarded on the bubbled input
resource.$part_id.$response_id.awarddetail - to 'ASSIGNED_SCORE'
Returns
the number of bubble sheet lines that were used (and likely need to
be passed to &Apache::lonxml::increment_counter()
Arguments
$part_id - id of the part to grade
$response_id - id of the response to grade
=cut
sub scored_response {
my ($part,$id)=@_;
my $repetition=&repetition();
my $bubbles_per_row;
if (($env{'form.bubbles_per_row'} =~ /^\d+$/) &&
($env{'form.bubbles_per_row'} > 0)) {
$bubbles_per_row = $env{'form.bubbles_per_row'};
} else {
$bubbles_per_row = 10;
}
my $score=0;
for (my $i=0;$i<$repetition;$i++) {
# A is 1, B is 2, etc.
my $increase=&Apache::response::getresponse($i+1);
unless (($increase == $bubbles_per_row-1) &&
($env{'form.scantron_lastbubblepoints'} == 0)) {
# (get response return 0-9 and then we add 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,$hash,$rndseed)=@_;
#&Apache::lonxml::debug("man $max randomize $randomize");
my @names;
if (ref($hash->{'names'}) eq 'ARRAY') {
@names = @{$hash->{'names'}};
}
return if (!@names);
my @whichopt =();
my (%top,@toplist,%bottom,@bottomlist);
if (!($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];
my $canshow = 0;
if ($award =~ /^correct/) {
if (($Apache::lonhomework::history{"resource.$part.awarded"} >= 1) ||
(&Apache::lonnet::EXT("resource.$part.retrypartial") !~/^1|on|yes$/)) {
$canshow = 1;
}
}
return (($canshow && &Apache::lonhomework::show_problem_status())
|| $status eq "SHOW_ANSWER");
}
sub analyze_store_foilgroup {
my ($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,$safeeval)=@_;
my @names;
if (ref($Apache::response::conceptgroup{'names'}) eq 'ARRAY') {
@names = @{ $Apache::response::conceptgroup{'names'} };
}
return if (!@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'};
}
=pod
=item get_response_param()
Get a parameter associated with a problem.
Parameters:
$id - the id of the paramater, either a part id,
or a partid and responspe id joined by _
$name - Name of the parameter to fetch
$default - Default value for the paramter.
=cut
sub get_response_param {
my ($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 ($env{'form.submitted'} eq "part_$partid") {
return 1;
}
if ($env{'form.submitted'} eq "yes"
&& defined($env{'form.submit_'.$partid})) {
return 1;
}
# Submit All button on a .page was pressed
if ($env{'form.all_submit'}) { return 1; }
# otherwise no submission occurred
return 0;
}
sub add_to_gradingqueue {
my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
if ( $courseid eq ''
|| $symb eq ''
|| $env{'request.state'} eq 'construct'
|| $Apache::lonhomework::type ne 'problem') {
return;
}
my %queue_info = ( 'type' => 'problem',
'time' => time);
if (exists($Apache::lonhomework::history{"resource.0.checkedin.slot"})) {
$queue_info{'slot'}=
$Apache::lonhomework::history{"resource.0.checkedin.slot"};
}
my $result=&Apache::bridgetask::add_to_queue('gradingqueue',\%queue_info);
if ($result ne 'ok') {
&Apache::lonxml::error("add_to_queue said $result");
}
}
=pod
=item check_status()
basically undef and 0 (both false) mean that they still have work to do
and all true values mean that they can't do any more work
a return of undef means it is unattempted
a return of 0 means it is both attempted and still has tries and
is wrong or is only partially correct, and retries
are allowed.
a return of 1 means it is marked correct
a return of 2 means they have exceeded maximum number of tries
a return of 3 means it is after the answer date
=cut
sub check_status {
my ($id)=@_;
if (!defined($id)) { $id=$Apache::inputtags::part; }
my $curtime=&Apache::lonnet::EXT('system.time');
my $opendate=&Apache::lonnet::EXT("resource.$id.opendate");
my $duedate=&Apache::lonhomework::due_date($id);
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/) {
my $awarded=&Apache::lonnet::EXT("user.resource.resource.$id.awarded");
my $retrypartial=&Apache::lonnet::EXT("resource.$id.retrypartial");
unless (($retrypartial =~ /^1|on|yes$/) && ($awarded <1)) {
return 1;
}
}
if (!$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;
}
=pod
=item setup_prior_tries_hash()
Foreach each past .submission $func is called with 3 arguments
- the mode to set things up for (currently always 'grade')
- the stored .submission string
- The expansion of $data
$data is an array ref containing elements that are either
- scalars that are other elements of the history hash to pass to $func
- ref to data to be passed untouched to $func
$questiontype is the questiontype (currently only passed in if
randomizebytry.
=cut
sub setup_prior_tries_hash {
my ($func,$data,$questiontype) = @_;
my $part = $Apache::inputtags::part;
my $id = $Apache::inputtags::response[-1];
foreach my $i (1..$Apache::lonhomework::history{'version'}) {
my $partprefix = "$i:resource.$part";
my $sub_key = "$partprefix.$id.submission";
next if (!exists($Apache::lonhomework::history{$sub_key}));
my $type_key = "$partprefix.type";
my $type = $Apache::lonhomework::history{$type_key};
my @other_data;
if (ref($data) eq 'ARRAY') {
foreach my $datum (@{ $data }) {
if (ref($datum)) {
push(@other_data,$datum);
} else {
my $info_key = "$i:resource.$part.$id.$datum";
push(@other_data,$Apache::lonhomework::history{$info_key});
}
}
}
if ($questiontype eq 'randomizetry') {
my $order_key = "$partprefix.$id.foilorder";
my @whichopts = &Apache::lonnet::str2array($Apache::lonhomework::history{$order_key});
if (@whichopts > 0) {
shift(@other_data);
unshift(@other_data,\@whichopts);
}
}
my $output =
&$func('grade',
$Apache::lonhomework::history{$sub_key},
\@other_data);
if (defined($output)) {
$Apache::inputtags::submission_display{$sub_key} = $output;
}
}
}
1;
__END__
=pod
=cut
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