--- loncom/homework/response.pm	2003/04/30 21:23:45	1.74
+++ loncom/homework/response.pm	2004/10/15 16:22:25	1.106
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # various response type definitons response definition
 #
-# $Id: response.pm,v 1.74 2003/04/30 21:23:45 albertel Exp $
+# $Id: response.pm,v 1.106 2004/10/15 16:22:25 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,12 +25,10 @@
 #
 # http://www.lon-capa.org/
 #
-# 11/23,11/24,11/28 Gerd Kortemeyer
-# Guy Albertelli
-# 08/04,08/07 Gerd Kortemeyer
 
 package Apache::response;
 use strict;
+use Apache::lonlocal;
 
 BEGIN {
     &Apache::lonxml::register('Apache::response',('responseparam','parameter','dataresponse'));
@@ -48,11 +46,22 @@ sub start_response {
     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;
+    #pop @Apache::inputtags::response;
     @Apache::inputtags::inputlist=();
     return '';
 }
@@ -62,6 +71,7 @@ sub start_hintresponse {
     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;
 }
@@ -75,27 +85,58 @@ sub end_hintresponse {
     return '';
 }
 
-# used by response to set the non-safe space random number generator to something
-# that is stable and unique based on the part number and response number
-sub setrandomnumber {
-    my $rndseed;
-    if ($ENV{'request.state'} eq "construct") {
-	$rndseed=$ENV{'form.rndseed'};
-	if (!$rndseed) { $rndseed=time; }
+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 {
-	$rndseed=&Apache::lonnet::rndseed();
+	&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 $rndmod=(&Apache::lonnet::numval($Apache::inputtags::part) << 10);
-    if (defined($Apache::inputtags::response['-1'])) {
-       $rndmod+=&Apache::lonnet::numval($Apache::inputtags::response[-1]);
+    my $rand_alg=&Apache::lonnet::get_rand_alg();
+    my $rndmod;
+    if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
+	$rand_alg eq '64bit2') {
+	$rndmod=(&Apache::lonnet::numval($Apache::inputtags::part) << 10);
+	if (defined($Apache::inputtags::response[-1])) {
+	    $rndmod+=&Apache::lonnet::numval($Apache::inputtags::response[-1]);
+	}
+    } else {
+	$rndmod=(&Apache::lonnet::numval2($Apache::inputtags::part) << 10);
+	if (defined($Apache::inputtags::response[-1])) {
+	    $rndmod+=&Apache::lonnet::numval2($Apache::inputtags::response[-1]);
+	}
     }
-    if ($rndseed =~/,/) {
-	my ($num1,$num2)=split(/,/,$rndseed);
+    if ($rndseed =~/([,:])/) {
+	my $char=$1;
+	use integer;
+	my ($num1,$num2)=split(/\Q$char\E/,$rndseed);
 	$num1+=$rndmod;
 	$num2+=$rndmod;
-	$rndseed="$num1,$num2";
+	$rndseed=$num1.$char.$num2;
     } else {
 	$rndseed+=$rndmod;
     }
@@ -114,8 +155,8 @@ sub meta_parameter_write {
     }
     $result.=            ' name="'.$name.'"'.
                          ' type="'.$type.'"'.
-($default?' default="'.$default.'"':'').
-($display?' display="'.$display.' [Part: '.$partref.']"':'')
+(defined($default)?' default="'.$default.'"':'').
+(defined($display)?' display="'.$display.' [Part: '.$partref.']"':'')
              .'></parameter>'
              ."\n";
     return $result;
@@ -176,12 +217,29 @@ sub mandatory_part_meta {
 #
 }
 
+sub meta_part_order {
+    if (@Apache::inputtags::partlist) {
+	my @parts=@Apache::inputtags::partlist;
+	shift(@parts);
+	return '<partorder>'.join(',',@parts).'</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) = @_;
     my %previous;
     $previous{'used'} = 0;
     foreach my $key (sort(keys(%Apache::lonhomework::history))) {
-	if ($key =~ /resource\.$partid\.$id\.submission/) {
+	if ($key =~ /resource\.$partid\.$id\.submission$/) {
 	    &Apache::lonxml::debug("Trying $key");
 	    my $pastresponse=$Apache::lonhomework::history{$key};
 	    if ($pastresponse eq $curresponse) {
@@ -255,7 +313,7 @@ sub end_dataresponse {
 	    my ($symb,$courseid,$domain,$name)=&Apache::lonxml::whichuser();
 	    my $allowed=&Apache::lonnet::allowed('mgr',$courseid);
 	    if ($allowed) {
-		&Apache::response::setup_params('dataresponse');
+		&Apache::response::setup_params('dataresponse',$safeeval);
 		my $partid = $Apache::inputtags::part;
 		my $id = $Apache::inputtags::response['-1'];
 		my $response = $ENV{'form.HWVAL_'.$id};
@@ -274,6 +332,24 @@ sub end_dataresponse {
     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,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result='';
@@ -284,6 +360,19 @@ sub start_responseparam {
 					$token->[2]->{'description'});
     } elsif ($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)) {
+	    $result.='Use template: <select name="'.
+		&Apache::edit::html_element_name('parameter_package').'">'.
+		    '<option value=""></option>'.$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).
@@ -291,9 +380,22 @@ sub start_responseparam {
 			"</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 $constructtag=&Apache::edit::get_new_args($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();
@@ -331,7 +433,7 @@ sub reset_params {
 }
 
 sub setup_params {
-    my ($tag) = @_;
+    my ($tag,$safeeval) = @_;
 
     if ($ENV{'request.state'} eq 'construct') { return; }
     my %paramlist=();
@@ -354,7 +456,9 @@ sub setup_params {
 	    &Apache::lonxml::debug("using nothing");
 	    $Apache::inputtags::params{$key}='';
 	} else {
-	    &Apache::lonxml::debug("using value");
+	    my $string="{return qq\0".$value."\0}";
+	    my $newvalue=&Apache::run::run($string,$safeeval,1);
+	    if (defined($newvalue)) { $value=$newvalue; }
 	    $Apache::inputtags::params{$key}=$value;
 	}
     }
@@ -363,9 +467,9 @@ sub setup_params {
 sub answer_header {
     my ($type) = @_;
     my $result;
-    if ($type eq 'optionresponse' || $type eq 'radiobuttonresponse' ) {
-	$result = '<table border="1"><tr><th>Answer for Part:'.
-	    $Apache::inputtags::part. '</th></tr><tr>'."\n";
+    if ($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 = '<table border="1"><tr><td>Answer for Part:'.
 	    $Apache::inputtags::part. '</td>'."\n";
@@ -376,8 +480,8 @@ sub answer_header {
 sub answer_part {
     my ($type,$answer) = @_;
     my $result;
-    if ($type eq 'optionresponse' || $type eq 'radiobuttonresponse') {
-	$result = '<td>'.$answer.'</td>';
+    if ($ENV{'form.answer_output_mode'} eq 'tex') {
+	$result = ' \verb|'.$answer.'|\\\\ \hline ';
     } else {
 	$result = '<td>'.$answer.'</td>';
     }
@@ -387,8 +491,8 @@ sub answer_part {
 sub answer_footer {
     my ($type) = @_;
     my $result;
-    if ($type eq 'optionresponse' || $type eq 'radiobuttonresponse') {
-	$result = '</tr></table>';
+    if ($ENV{'form.answer_output_mode'} eq 'tex') {
+	$result = ' \end{tabular} \vskip 0 mm ';
     } else {
 	$result = '</tr></table>';
     }
@@ -396,16 +500,18 @@ sub answer_footer {
 }
 
 sub showallfoils {
-    my $return=0;
-    if (defined($ENV{'form.showallfoils'}) &&
-	$ENV{'request.state'} eq 'construct') {
-	$return=1;
+    if (defined($ENV{'form.showallfoils'})) {
+	my ($symb)=&Apache::lonxml::whichuser();
+	if ($ENV{'request.state'} eq 'construct' || 
+	    ($ENV{'user.adv'} && $symb eq '')) {
+	    return 1;
+	}
     }
-    return $return;
+    return 0;
 }
 
 sub getresponse {
-    my ($temp)=@_;
+    my ($temp,$resulttype)=@_;
     my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
     my $response;
     if (!defined($temp)) {
@@ -425,7 +531,13 @@ sub getresponse {
 	# save bubbled letter for later
 	$Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
 	    $response;
-	$response = $let_to_num{$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};
     }
@@ -449,6 +561,7 @@ sub scored_response {
 	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"}=
@@ -456,6 +569,139 @@ sub scored_response {
     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;
+}
+
 1;
 __END__