--- loncom/homework/response.pm	2003/10/06 21:57:54	1.86
+++ loncom/homework/response.pm	2004/02/27 17:18:32	1.92
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # various response type definitons response definition
 #
-# $Id: response.pm,v 1.86 2003/10/06 21:57:54 albertel Exp $
+# $Id: response.pm,v 1.92 2004/02/27 17:18:32 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,9 +25,6 @@
 #
 # 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;
@@ -48,6 +45,16 @@ sub start_response {
     push (@Apache::inputtags::response,$id);
     push (@Apache::inputtags::responselist,$id);
     @Apache::inputtags::inputlist=();
+    if ($Apache::inputtags::part eq '') {
+	&Apache::lonxml::error(&HTML::Entities::encode(&mt("Found a <*response> outside of a <part> in a <part>ed problem")));
+    }
+    if ($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;
 }
 
@@ -80,17 +87,13 @@ sub end_hintresponse {
 # 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; }
-    } else {
-	$rndseed=&Apache::lonnet::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]);
+	$rndmod+=&Apache::lonnet::numval($Apache::inputtags::response[-1]);
     }
     if ($rndseed =~/,/) {
 	{
@@ -118,8 +121,8 @@ 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;
@@ -463,7 +466,7 @@ sub showallfoils {
 }
 
 sub getresponse {
-    my ($temp)=@_;
+    my ($temp,$resulttype)=@_;
     my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
     my $response;
     if (!defined($temp)) {
@@ -483,7 +486,9 @@ sub getresponse {
 	# save bubbled letter for later
 	$Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
 	    $response;
-	$response = $let_to_num{$response};
+	if ($resulttype ne 'letter') {
+	    $response = $let_to_num{$response};
+	}
     } else {
 	$response = $ENV{$formparm};
     }
@@ -507,6 +512,7 @@ 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"}=
@@ -562,7 +568,6 @@ sub whichorder {
     for (my $i=0;$i<=$#bottomlist;$i++) {
 	if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
     }
-
     return @whichopt;
 }
 
@@ -574,6 +579,57 @@ sub show_answer {
 	       && 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"} }, @{ $shown });
+}
+
+sub pick_foil_for_concept {
+    my ($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'};
+
+}
+
+
 1;
 __END__