--- loncom/homework/default_homework.lcpm	2008/03/05 16:06:39	1.127
+++ loncom/homework/default_homework.lcpm	2008/06/12 00:46:52	1.136
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # used by lonxml::xmlparse() as input variable $safeinit to Apache::run::run()
 #
-# $Id: default_homework.lcpm,v 1.127 2008/03/05 16:06:39 www Exp $
+# $Id: default_homework.lcpm,v 1.136 2008/06/12 00:46:52 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -157,7 +157,7 @@ sub caparesponse_check {
 
     #&LONCAPA_INTERNAL_DEBUG(" type is $type ");
     if ($type eq 'cs' || $type eq 'ci') {
-	#for string answers make surec all places spaces occur, there is 
+	#for string answers make sure all places spaces occur, there is 
         #really only 1 space, in both the answer and the response
 	$answer=~s/ +/ /g;
 	$response=~s/ +/ /g;
@@ -260,13 +260,10 @@ sub caparesponse_check {
 
 sub caparesponse_check_list {
     my $responses=$LONCAPA::CAPAresponse_args{'response'};
-#    &LONCAPA_INTERNAL_DEBUG(" answer is ".
-#			    &LONCAPA_INTERNAL_Dumper($LONCAPA::CAPAresponse_answer).":\n");
-#    &LONCAPA_INTERNAL_DEBUG(" respons is ".
-#			    &LONCAPA_INTERNAL_Dumper($responses).":\n");
     &LONCAPA_INTERNAL_DEBUG("args ".join(':',%LONCAPA::CAPAresponse_args));
     my $type = $LONCAPA::CAPAresponse_args{'type'};
-    &LONCAPA_INTERNAL_DEBUG("Got type :$type:\n");
+    my $answerunit=$LONCAPA::CAPAresponse_args{'unit'};
+    &LONCAPA_INTERNAL_DEBUG("Got type :$type: answer unit :$answerunit:\n");
     
     my $num_input_lines =
 	scalar(@{$LONCAPA::CAPAresponse_answer->{'answers'}});
@@ -291,8 +288,6 @@ sub caparesponse_check_list {
 	    $responses->[$which]=[$responses->[$which]];
 	}
     }
-#    &LONCAPA_INTERNAL_DEBUG(" parsed response is ".
-#			    &LONCAPA_INTERNAL_Dumper($responses).":\n");
     foreach my $which (0..($num_input_lines-1)) {
 	my $answer_size = 
 	    scalar(@{$LONCAPA::CAPAresponse_answer->{'answers'}[$which]});
@@ -310,20 +305,29 @@ sub caparesponse_check_list {
     my $unit;
     if ($type eq '' || $type eq 'float') {
 	#for numerical problems split off the unit
-	if ( $responses->[0][-1]=~ /(.*[^\s])\s+([^\s]+)/ ) {
+#	if ( $responses->[0][-1]=~ /(.*[^\s])\s+([^\s]+)/ ) {
+        if ( $responses->[0][-1]=~ /^([\d\.\,\s\$]*(?:(?:[xX\*]10[\^\*]*|[eE]*)[\+\-]*\d*)*(?:^|\S)\d+)([\$\s\w\^\*\/\(\)\+\-]*[^\d\.\s\,][\$\s\w\^\*\/\(\)\+\-]*)$/ ) {
 	    $responses->[0][-1]=$1;
-	    $unit=$2;
+	    $unit=&capa_formula_fix($2);
+            &LONCAPA_INTERNAL_DEBUG("Found unit :$unit:");
 	}
     }
     &LONCAPA_INTERNAL_DEBUG("Final final response :$responses->[0][-1]:$unit:");
     $unit=~s/\s//;
-    if ($unit ne '') {
-	foreach my $response (@$responses) {
-	    foreach my $element (@$response) {	
-                $element =~ s/\s//g;    
-		$element .= " $unit";
-	    }
-	}
+    foreach my $response (@$responses) {
+       foreach my $element (@$response) {	
+          $element =~ s/\s//g;
+          my $appendunit=$unit;
+          if ($unit=~/\%/) {
+             $element=$element/100;
+             $appendunit=~s/\%//;
+          }    
+          if (($element==0) && ($unit!~/\w/) && ($answerunit=~/\w/)) {
+             $appendunit=$answerunit;
+          }
+          $element .= " $appendunit";
+          &LONCAPA_INTERNAL_DEBUG("Made response element :$element:");
+       }
     }
     
     foreach my $thisanswer (@{ $LONCAPA::CAPAresponse_answer->{'answers'} }) {
@@ -1020,40 +1024,57 @@ sub sec {
     return $sec;
 }
 
+sub submission {
+   my ($partid,$responseid,$subnumber)=@_;
+   my $sub='';
+   if ($subnumber) { $sub=$subnumber.':'; }
+   return &EXT('user.resource.'.$sub.'resource.'.$partid.'.'.$responseid.'.submission');
+}
+
+sub currentpart {
+   return $external::part;
+}
+
+sub eval_time {
+   my ($timestamp)=@_;
+   unless ($timestamp) { return ''; }
+   return &locallocaltime($timestamp);
+}
+
 sub open_date { 
-    my @dc = split(/\s+/,localtime(&EXT('resource.0.opendate')));
-    return '' if ($dc[0] eq "Wed" and $dc[2] == 31 and $dc[4] == 1969);
-    my @hm = split(/:/,$dc[3]);
-    my $ampm = " am";
-    if ($hm[0] > 12) {
-	$hm[0]-=12;
-	$ampm = " pm";
-    }
-    return $dc[0].', '.$dc[1].' '.$dc[2].', '.$dc[4].' at '.$hm[0].':'.$hm[1].$ampm;
-}
-
-sub due_date { 
-    my @dc = split(/\s+/,localtime(&EXT('resource.0.duedate')));
-    return '' if ($dc[0] eq "Wed" and $dc[2] == 31 and $dc[4] == 1969);
-    my @hm = split(/:/,$dc[3]);
-    my $ampm = " am";
-    if ($hm[0] > 12) {
-	$hm[0]-=12;
-	$ampm = " pm";
-    }
-    return $dc[0].', '.$dc[1].' '.$dc[2].', '.$dc[4].' at '.$hm[0].':'.$hm[1].$ampm;
+    my ($partid)=@_;
+    unless ($partid) { $partid=0; }
+    return &eval_time(&EXT('resource.'.$partid.'.opendate'));
+}
+
+sub due_date {
+    my ($partid)=@_;
+    unless ($partid) { $partid=0; } 
+    return &eval_time(&EXT('resource.'.$partid.'.duedate'));
 }
 
 sub answer_date { 
-    my @dc = split(/\s+/,localtime(&EXT('resource.0.answerdate')));
-    return '' if ($dc[0] eq "Wed" and $dc[2] == 31 and $dc[4] == 1969);
-    my @hm = split(/:/,$dc[3]);
-    my $ampm = " am";
-    if ($hm[0] > 12) {
-	$hm[0]-=12;
-	$ampm = " pm";
-    }
-    return $dc[0].', '.$dc[1].' '.$dc[2].', '.$dc[4].' at '.$hm[0].':'.$hm[1].$ampm;
+    my ($partid)=@_;
+    unless ($partid) { $partid=0; }
+    return &eval_time(&EXT('resource.'.$partid.'.answerdate'));
+}
+
+sub open_date_epoch {
+    my ($partid)=@_;
+    unless ($partid) { $partid=0; }
+    return &EXT('resource.'.$partid.'.opendate');
+}
+
+sub due_date_epoch {
+    my ($partid)=@_;
+    unless ($partid) { $partid=0; }
+    return &EXT('resource.'.$partid.'.duedate');
+}
+
+sub answer_date_epoch {
+    my ($partid)=@_;
+    unless ($partid) { $partid=0; }
+    return &EXT('resource.'.$partid.'.answerdate');
 }
 
 sub array_moments {