--- loncom/homework/inputtags.pm	2002/08/07 16:23:05	1.60
+++ loncom/homework/inputtags.pm	2003/07/15 21:26:23	1.109
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # input  definitons
 #
-# $Id: inputtags.pm,v 1.60 2002/08/07 16:23:05 albertel Exp $
+# $Id: inputtags.pm,v 1.109 2003/07/15 21:26:23 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -30,9 +30,10 @@
 package Apache::inputtags;
 use HTML::Entities();
 use strict;
+use Apache::loncommon;
 
 BEGIN {
-  &Apache::lonxml::register('Apache::inputtags',('textfield','textline','datasubmission'));
+  &Apache::lonxml::register('Apache::inputtags',('hiddenline','textfield','textline'));
 }
 
 
@@ -47,8 +48,12 @@ sub initialize_inputtags {
   @Apache::inputtags::responselist=();
   # list of whether or not a specific response was previously used
   @Apache::inputtags::previous=();
+  # submission it was used in
+  @Apache::inputtags::previous_version=();
   # id of current part, 0 means that no part is current (inside <problem> only
   $Apache::inputtags::part='';
+  # list of all part ids seen
+  @Apache::inputtags::partlist=();
   # list of problem date statuses, the first element is for <problem>
   # if there is a second element it is for the current <part>
   @Apache::inputtags::status=();
@@ -56,6 +61,26 @@ sub initialize_inputtags {
   %Apache::inputtags::params=();
   # list of all ids, for <import>, these get join()ed and prepended
   @Apache::inputtags::import=();
+  # list of all import ids seen
+  @Apache::inputtags::importlist=();
+}
+
+sub check_for_duplicate_ids {
+    my %check;
+    foreach my $id (@Apache::inputtags::partlist,
+		    @Apache::inputtags::responselist,
+		    @Apache::inputtags::importlist) {
+	$check{$id}++;
+    }
+    my @duplicates;
+    foreach my $id (sort(keys(%check))) {
+	if ($check{$id} > 1) {
+	    push(@duplicates,$id);
+	}
+    }
+    if (@duplicates) {
+	&Apache::lonxml::error("Duplicated ids found, problem will operate incorrectly. Duplicated ids seen: ",join(', ',@duplicates));
+    }
 }
 
 sub start_input {
@@ -79,34 +104,38 @@ sub start_textfield {
   my $resid=$Apache::inputtags::response[-1];
   if ($target eq 'web') {
     $Apache::lonxml::evaluate--;
-    my $partid=$Apache::inputtags::part;
-    my $oldresponse = &HTML::Entities::encode($Apache::lonhomework::history{"resource.$partid.$resid.submission"});
-    my $cols = &Apache::lonxml::get_param('cols',$parstack,$safeeval);
-    if ( $cols eq '') { $cols = 80; }
-    my $rows = &Apache::lonxml::get_param('rows',$parstack,$safeeval);
-    if ( $rows eq '') { $rows = 10; }
     if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
-      $result= '<textarea name="HWVAL'.$resid.'" '.
-	"rows=\"$rows\" cols=\"$cols\">".$oldresponse;
+	my $partid=$Apache::inputtags::part;
+	my $oldresponse = &HTML::Entities::encode($Apache::lonhomework::history{"resource.$partid.$resid.submission"});
+	my $cols = &Apache::lonxml::get_param('cols',$parstack,$safeeval);
+	if ( $cols eq '') { $cols = 80; }
+	my $rows = &Apache::lonxml::get_param('rows',$parstack,$safeeval);
+	if ( $rows eq '') { $rows = 10; }
+	$result= '<textarea name="HWVAL_'.$resid.'" '.
+	    "rows=\"$rows\" cols=\"$cols\">".$oldresponse;
+	if ($oldresponse ne '') {
+	    #get rid of any startup text if the user has already responded
+	    &Apache::lonxml::get_all_text("/textfield",$parser);
+	}
     } else {
-      $result='<table border="1"><tr><td><i>'.$oldresponse.'</i></td></tr></table>';
-    }
-    if ($oldresponse ne '') {
-      #get rid of any startup text if the user has already responded
-      &Apache::lonxml::get_all_text("/textfield",$$parser[-1]);
+	#right or wrong don't show it
+	#$result='<table border="1"><tr><td><i>'.$oldresponse.'</i></td></tr></table>';
+	$result='';
+	#get rid of any startup text
+	&Apache::lonxml::get_all_text("/textfield",$parser);
     }
   } elsif ($target eq 'grade') {
-    my $seedtext=&Apache::lonxml::get_all_text("/textfield",$$parser[-1]);
-    if ($seedtext eq $ENV{'form.HWVAL'.$resid}) {
+    my $seedtext=&Apache::lonxml::get_all_text("/textfield",$parser);
+    if ($seedtext eq $ENV{'form.HWVAL_'.$resid}) {
       # if the seed text is still there it wasn't a real submission
-      $ENV{'form.HWVAL'.$resid}='';
+      $ENV{'form.HWVAL_'.$resid}='';
     }
   } elsif ($target eq 'edit') {
     $result.=&Apache::edit::tag_start($target,$token);
     $result.=&Apache::edit::text_arg('Rows:','rows',$token,4);
     $result.=&Apache::edit::text_arg('Columns:','cols',$token,4);
-    my $bodytext=&Apache::lonxml::get_all_text("/textfield",$$parser[-1]);
-    $result.=&Apache::edit::editfield($token->[1],$bodytext,'Text you want to appear by default:',50,2);
+    my $bodytext=&Apache::lonxml::get_all_text("/textfield",$parser);
+    $result.=&Apache::edit::editfield($token->[1],$bodytext,'Text you want to appear by default:',80,2);
   } elsif ($target eq 'modified') {
     my $constructtag=&Apache::edit::get_new_args($token,$parstack,
 						 $safeeval,'rows','cols');
@@ -115,7 +144,21 @@ sub start_textfield {
     } else {
       $result=$token->[4];
     }
+    my $bodytext=&Apache::lonxml::get_all_text("/textfield",$parser);
     $result.=&Apache::edit::modifiedfield();
+  } elsif ($target eq 'tex') {
+      my $number_of_lines = &Apache::lonxml::get_param('rows',$parstack,$safeeval);
+      my $width_of_box = &Apache::lonxml::get_param('cols',$parstack,$safeeval);
+      if ($$tagstack[-2] eq 'essayresponse' and $Apache::lonhomework::type eq 'exam') {
+	  $result = '\fbox{\fbox{\parbox{\textwidth-5mm}{';
+	  for (my $i=0;$i<int $number_of_lines*2;$i++) {$result.='\strut \\\\ ';}
+	  $result.='\strut \\\\\strut \\\\\strut \\\\\strut \\\\}}}';
+      } else {
+	  my $TeXwidth=$width_of_box/80;
+	  $result = '\vskip 1 mm \fbox{\fbox{\parbox{'.$TeXwidth.'\textwidth-5mm}{';
+	  for (my $i=0;$i<int $number_of_lines*2;$i++) {$result.='\strut \\\\ ';}
+	  $result.='}}}\vskip 2 mm ';
+      }
   }
   return $result;
 }
@@ -140,16 +183,23 @@ sub start_textline {
   my $result = "";
   if ($target eq 'web') {
     $Apache::lonxml::evaluate--;
-    my $size = &Apache::lonxml::get_param('size',$parstack,$safeeval);
-    if ($size eq '') { $size=20; }
     my $partid=$Apache::inputtags::part;
     my $id=$Apache::inputtags::response[-1];
-    my $oldresponse = &HTML::Entities::encode($Apache::lonhomework::history{"resource.$partid.$id.submission"});
     if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
-      $result= '<input type="text" name="HWVAL'.$id.'" value="'.
-	$oldresponse.'" size="'.$size.'" />';
+      my $size = &Apache::lonxml::get_param('size',$parstack,$safeeval);
+      my $maxlength;
+      if ($size eq '') { $size=20; } else {
+	if ($size < 20) { $maxlength=$size; }
+      }
+      my $oldresponse = &HTML::Entities::encode($Apache::lonhomework::history{"resource.$partid.$id.submission"});
+      if ($Apache::lonhomework::type ne 'exam') {
+        $result= '<input type="text" name="HWVAL_'.$id.'" value="'.
+	    $oldresponse.'" size="'.$size.'" maxlength="'.$maxlength.'" />';
+      }
     } else {
-      $result='<i>'.$oldresponse.'</i>';
+      #right or wrong don't show what was last typed in.
+      #$result='<i>'.$oldresponse.'</i>';
+      $result='';
     }
   } elsif ($target eq 'edit') {
     $result=&Apache::edit::tag_start($target,$token);
@@ -158,6 +208,10 @@ sub start_textline {
   } elsif ($target eq 'modified') {
     my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'size');
     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
+  } elsif ($target eq 'tex' and $Apache::lonhomework::type ne 'exam') {
+      my $size = &Apache::lonxml::get_param('size',$parstack,$safeeval);
+      if ($size != 0) {$size=$size*2; $size.=' mm';} else {$size='40 mm';}
+      $result='\framebox['.$size.'][s]{\tiny\strut}';
   }
   return $result;
 }
@@ -169,38 +223,32 @@ sub end_textline {
   return "";
 }
 
-sub start_datasubmission {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-  my $id = &Apache::response::start_response($parstack,$safeeval);
-  my $result;
-  if ($target eq 'meta') {
-    $result = &Apache::response::meta_stores_write($token->[2]->{'name'},
-						   $token->[2]->{'type'},
-						   $token->[2]->{'display'});
-    $result .= &Apache::response::meta_package_write('datasubmission');
-  }
-  return $result;
+sub start_hiddenline {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result = "";
+    if ($target eq 'web') {
+	$Apache::lonxml::evaluate--;
+	if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
+	    my $partid=$Apache::inputtags::part;
+	    my $id=$Apache::inputtags::response[-1];
+	    my $oldresponse = &HTML::Entities::encode($Apache::lonhomework::history{"resource.$partid.$id.submission"});
+	    if ($Apache::lonhomework::type ne 'exam') {
+		$result= '<input type="hidden" name="HWVAL_'.$id.'" value="'.
+		    $oldresponse.'" />';
+	    }
+	}
+    } elsif ($target eq 'edit') {
+	$result=&Apache::edit::tag_start($target,$token);
+	$result.=&Apache::edit::end_table;
+    }
+    return $result;
 }
 
-sub end_datasubmission {
+sub end_hiddenline {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-  my $result;
-  if ( $target eq 'web' ) {
-  } elsif ($target eq 'grade' ) {
-    if ( defined $ENV{'form.submitted'}) {
-      &Apache::response::setup_params('datasubmission');
-      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::response::end_response;
-  return $result;
+  if    ($target eq 'web') { $Apache::lonxml::evaluate++; }
+  elsif ($target eq 'edit') { return ('','no'); }
+  return "";
 }
 
 sub finalizeawards {
@@ -226,7 +274,9 @@ sub finalizeawards {
   if ($result eq '' ) {
     foreach $award (@_) { if ($award eq 'NO_RESPONSE') {$result='NO_RESPONSE'; last;} }
   }
-
+  if ($result eq '' ) {
+    foreach $award (@_) { if ($award eq 'TOO_LONG') {$result='TOO_LONG'; last;}}
+  }
   if ($result eq '' ) {
     foreach $award (@_) { 
       if ($award eq 'UNIT_FAIL' ||
@@ -249,12 +299,21 @@ sub finalizeawards {
     foreach $award (@_) { if ($award eq 'INCORRECT') {$result=$award; last;} }
   }
   if ($result eq '' ) {
+      foreach $award (@_) { if ($award eq 'MISORDERED_RANK') {$result=$award; last;} }
+  }
+  if ($result eq '' ) {
+      foreach $award (@_) { if ($award eq 'INVALID_FILETYPE') {$result=$award; last;} }
+  }
+  if ($result eq '' ) {
     foreach $award (@_) { if ($award eq 'DRAFT') {$result=$award; last;} }
   }
   if ($result eq '' ) {
     foreach $award (@_) { if ($award eq 'SUBMITTED') {$result=$award; last;} }
   }
   if ($result eq '' ) {
+    foreach $award (@_) { if ($award eq 'ASSIGNED_SCORE') {$result=$award; last;} }
+  }
+  if ($result eq '' ) {
     foreach $award (@_) { if ($award eq 'APPROX_ANS') {$result=$award; last;} }
   }
   if ($result eq '' ) { $result='EXACT_ANS'; }
@@ -262,89 +321,189 @@ sub finalizeawards {
 }
 
 sub decideoutput {
-  my ($award,$solved,$previous)=@_;
+  my ($award,$solved,$previous,$target)=@_;
   my $message='';
   my $button=0;
   my $previousmsg;
-
+  my $bgcolor='orange';
+  my %possiblecolors =
+      ( 'correct' => '#aaffaa',
+	'charged_try' => '#ffaaaa',
+	'not_charged_try' => '#ffffaa',
+	'no_message' => '#fffff',
+      );
   if ($previous) { $previousmsg='You have entered that answer before'; }
 
   if      ($solved =~ /^correct/) {
-    $message = "<b>You are correct.</b> Your receipt is ".
-      &Apache::lonnet::receipt;
-    $button=0;
-    $previousmsg='';
+      if ($award eq 'ASSIGNED_SCORE') {
+	  $message = "A score has been assigned.";
+      } else {
+	  if ($target eq 'tex') {
+	      $message = '\textbf{You are correct}.';
+	  } else {
+	      $message = "<b>You are correct.</b>";
+	  }
+          unless ($ENV{'course.'.
+			   $ENV{'request.course.id'}.
+			   '.disable_receipt_display'} eq 'yes') { 
+	      $message.='<br />Your receipt is '.&Apache::lonnet::receipt().
+		  &Apache::loncommon::help_open_topic('Receipt');
+	  }
+      }
+      $bgcolor=$possiblecolors{'correct'};
+      $button=0;
+      $previousmsg='';
   } elsif ($solved =~ /^excused/) {
-    $message = "<b>You are excused from the problem.</b>";
-    $button=0;
-    $previousmsg='';
-  } elsif ($award eq 'EXACT_ANS' || $award eq 'APPROX_ANS' ) {
-    if ($solved =~ /^incorrect/ || $solved eq '') {
-      $message = "Incorrect";
-      $button=1;
-    } else {
-      $message = "<b>You are correct.</b> Your receipt is ".
-	&Apache::lonnet::receipt;
+      $message = "<b>You are excused from the problem.</b>";
+      $bgcolor=$possiblecolors{'charged_try'};
       $button=0;
       $previousmsg='';
-    }
+  } elsif ($award eq 'EXACT_ANS' || $award eq 'APPROX_ANS' ) {
+      if ($solved =~ /^incorrect/ || $solved eq '') {
+	  $message = "Incorrect";
+	  $bgcolor=$possiblecolors{'charged_try'};
+	  $button=1;
+      } else {
+	  $message = "<b>You are correct.</b>";
+          unless ($ENV{'course.'.
+			   $ENV{'request.course.id'}.
+			   '.disable_receipt_display'} eq 'yes') { 
+              $message.='<br />Your receipt is '.&Apache::lonnet::receipt().
+		  &Apache::loncommon::help_open_topic('Receipt');
+	  }
+	  $bgcolor=$possiblecolors{'correct'};
+	  $button=0;
+	  $previousmsg='';
+      }
   } elsif ($award eq 'NO_RESPONSE') {
-    $message = '';
-    $button=1;
+      $message = '';
+      $bgcolor=$possiblecolors{'no_feedback'};
+      $button=1;
   } elsif ($award eq 'MISSING_ANSWER') {
-    $message = 'Some parts were not submitted';
-    $button = 1;
+      $message = 'Some parts were not submitted';
+      $bgcolor=$possiblecolors{'not_charged_try'};
+      $button = 1;
+  } elsif ($award eq 'ERROR') {
+      $message = 'An error occured while grading your answer.';
+      $bgcolor=$possiblecolors{'not_charged_try'};
+      $button = 1;
+  } elsif ($award eq 'TOO_LONG') {
+      $message = "The submitted answer was too long.";
+      $bgcolor=$possiblecolors{'not_charged_try'};
+      $button=1;
   } elsif ($award eq 'WANTED_NUMERIC') {
-    $message = "This question expects a numeric answer";
-    $button=1;
+      $message = "This question expects a numeric answer";
+      $bgcolor=$possiblecolors{'not_charged_try'};
+      $button=1;
+  } elsif ($award eq 'MISORDERED_RANK') {
+      $message = 'You have provided an invalid ranking, please refer to '.
+	  &Apache::loncommon::help_open_topic('Ranking_Problems','help on ranking problems').'.';
+      $bgcolor=$possiblecolors{'not_charged_try'};
+      $button=1;
+  } elsif ($award eq 'INVALID_FILETYPE') {
+      $message = 'The filetype extension of the file you uploaded is not allowed.';
+      $bgcolor=$possiblecolors{'not_charged_try'};
+      $button=1;
   } elsif ($award eq 'SIG_FAIL') {
-    $message = "Please adjust significant figures.";# you provided %s significant figures";
-    $button=1;
+      $message = "Please adjust significant figures.";# you provided %s significant figures";
+      $bgcolor=$possiblecolors{'not_charged_try'};
+      $button=1;
   } elsif ($award eq 'UNIT_FAIL') {
-    $message = "Units incorrect."; #Computer reads units as %s";
-    $button=1;
+      $message = "Units incorrect. ".
+       &Apache::loncommon::help_open_topic('Physical_Units'); #Computer reads units as %s";
+      $bgcolor=$possiblecolors{'not_charged_try'};
+      $button=1;
   } elsif ($award eq 'UNIT_NOTNEEDED') {
-    $message = "Only a number required.";# Computer reads units of %s";
-    $button=1;
+      $message = "Only a number required.";# Computer reads units of %s";
+      $bgcolor=$possiblecolors{'not_charged_try'};
+      $button=1;
   } elsif ($award eq 'NO_UNIT') {
-    $message = "Units required";
-    $button=1;
+      $message = "Units required".
+	  &Apache::loncommon::help_open_topic('Physical_Units');
+      $bgcolor=$possiblecolors{'not_charged_try'};
+      $button=1;
   } elsif ($award eq 'BAD_FORMULA') {
-    $message = "Unable to understand formula";
-    $button=1;
+      $message = "Unable to understand formula";
+      $bgcolor=$possiblecolors{'not_charged_try'};
+      $button=1;
   } elsif ($award eq 'INCORRECT') {
-    $message = "Incorrect";
-    $button=1;
+      $message = "Incorrect";
+      $bgcolor=$possiblecolors{'charged_try'};
+      $button=1;
   } elsif ($award eq 'SUBMITTED') {
-    $message = "Your submission has been recorded.";
-    $button=1;
+      $message = "Your submission has been recorded.";
+      $bgcolor=$possiblecolors{'correct'};
+      $button=1;
   } elsif ($award eq 'DRAFT') {
-    $message = "A draft copy has been saved.";
-    $button=1;
+      $message = "A draft copy has been saved.";
+      $bgcolor=$possiblecolors{'not_charged_try'};
+      $button=1;
+  } elsif ($award eq 'ASSIGNED_SCORE') {
+      $message = "A score has been assigned.";
+      $bgcolor=$possiblecolors{'correct'};
+      $button=0;
   } else {
-    $message = "Unknown message: $award";
-    $button=1;
+      $message = "Unknown message: $award";
+      $button=1;
+  }
+  if (lc($Apache::lonhomework::problemstatus) eq 'no') {
+      $message = "Answer Submitted";
+      $bgcolor=$possiblecolors{'correct'};
+      $button=1;
   }
-  return ($button,$message,$previousmsg);
+  return ($button,$bgcolor,$message,$previousmsg);
+}
+
+sub removealldata {
+    my ($id)=@_;
+    foreach my $key (keys(%Apache::lonhomework::results)) {
+	if (($key =~ /^resource\.\Q$id\E\./) && ($key !~ /\.collaborators$/)) {
+	    &Apache::lonxml::debug("Removing $key");
+	    delete($Apache::lonhomework::results{$key});
+	}
+    }
 }
 
 sub setgradedata {
   my ($award,$id,$previously_used) = @_;
   # if the student already has it correct, don't modify the status
-  if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER') {
+  if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
+      $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
     $Apache::lonhomework::results{"resource.$id.afterduedate"}=$award;
     return '';
   } elsif ( $Apache::lonhomework::history{"resource.$id.solved"} !~
-       /^correct/ ) {
+       /^correct/ || $Apache::lonhomework::scantronmode ||
+	    lc($Apache::lonhomework::problemstatus) eq 'no') {
     #handle assignment of tries and solved status
+    my $solvemsg;
+    if ($Apache::lonhomework::scantronmode) {
+	$solvemsg='correct_by_scantron';
+    } else {
+	$solvemsg='correct_by_student';
+    }
     if ($Apache::lonhomework::history{"resource.$id.afterduedate"}) {
       $Apache::lonhomework::results{"resource.$id.afterduedate"}='';
     }
-    if ( $award eq 'APPROX_ANS' || $award eq 'EXACT_ANS' ) {
+    if ( $award eq 'ASSIGNED_SCORE') {
+	$Apache::lonhomework::results{"resource.$id.tries"} =
+	    $Apache::lonhomework::history{"resource.$id.tries"} + 1;
+	$Apache::lonhomework::results{"resource.$id.solved"} =
+	    $solvemsg;
+	my $numawards=scalar(@Apache::inputtags::response);
+	$Apache::lonhomework::results{"resource.$id.awarded"} = 0;
+	foreach my $res (@Apache::inputtags::response) {
+	    $Apache::lonhomework::results{"resource.$id.awarded"}+=
+	       $Apache::lonhomework::results{"resource.$id.$res.awarded"};
+	}
+	if ($numawards > 0) {
+	    $Apache::lonhomework::results{"resource.$id.awarded"}/=
+		$numawards;
+	}
+    } elsif ( $award eq 'APPROX_ANS' || $award eq 'EXACT_ANS' ) {
       $Apache::lonhomework::results{"resource.$id.tries"} =
 	$Apache::lonhomework::history{"resource.$id.tries"} + 1;
       $Apache::lonhomework::results{"resource.$id.solved"} =
-	'correct_by_student';
+	$solvemsg;
       $Apache::lonhomework::results{"resource.$id.awarded"} = '1';
     } elsif ( $award eq 'INCORRECT' ) {
       $Apache::lonhomework::results{"resource.$id.tries"} =
@@ -359,31 +518,40 @@ sub setgradedata {
     } elsif ( $award eq 'DRAFT' ) {
       $Apache::lonhomework::results{"resource.$id.solved"} = '';
     } elsif ( $award eq 'NO_RESPONSE' ) {
-      return '';
+	#no real response so delete any data that got stored
+	&removealldata($id);
+	return '';
     } else {
       $Apache::lonhomework::results{"resource.$id.solved"} =
 	'incorrect_attempted';
+      if (lc($Apache::lonhomework::problemstatus) eq 'no') {
+	  $Apache::lonhomework::results{"resource.$id.tries"} =
+	      $Apache::lonhomework::history{"resource.$id.tries"} + 1;
+      }
     }
 
     # check if this was a previous submission if it was delete the
     # unneeded data and update the previously_used attribute
     if ( $previously_used eq 'PREVIOUSLY_USED') {
-      delete($Apache::lonhomework::results{"resource.$id.tries"});
-      $Apache::lonhomework::results{"resource.$id.previous"} = '1';
+	if (lc($Apache::lonhomework::problemstatus) ne 'no') {
+	    delete($Apache::lonhomework::results{"resource.$id.tries"});
+	    $Apache::lonhomework::results{"resource.$id.previous"} = '1';
+	}
     } elsif ( $previously_used eq 'PREVIOUSLY_LAST') {
       #delete all data as they student didn't do anything, but save
       #the list of collaborators.
-      foreach my $key (keys(%Apache::lonhomework::results)) {
-	if (($key =~ /^resource\.$id\./) && ($key !~ /\.collaborators$/)) {
-	  &Apache::lonxml::debug("Removing $key");
-	  delete($Apache::lonhomework::results{$key});
-	}
-      }
+      &removealldata($id);
       #and since they didn't do anything we were never here
       return '';
     } else {
       $Apache::lonhomework::results{"resource.$id.previous"} = '0';
     }
+  } elsif ( $Apache::lonhomework::history{"resource.$id.solved"} =~
+	    /^correct/ ) {
+      #delete all data as they student already has it correct
+      &removealldata($id);
+      #and since they didn't do anything we were never here
+      return '';
   }
   $Apache::lonhomework::results{"resource.$id.award"} = $award;
 }
@@ -394,7 +562,7 @@ sub grade {
   my $response='';
   if ( defined $ENV{'form.submitted'}) {
     my @awards = ();
-    foreach $response (@Apache::inputtags::responselist) {
+    foreach $response (@Apache::inputtags::response) {
       &Apache::lonxml::debug("looking for response.$id.$response.awarddetail");
       my $value=$Apache::lonhomework::results{"resource.$id.$response.awarddetail"};
       &Apache::lonxml::debug("keeping $value from $response for $id");
@@ -403,13 +571,23 @@ sub grade {
     my $finalaward = &finalizeawards(@awards);
     my $previously_used;
     if ( $#Apache::inputtags::previous eq $#awards ) {
-      $previously_used = 'PREVIOUSLY_LAST';
-      foreach my $value (@Apache::inputtags::previous) {
-	if ($value eq 'PREVIOUSLY_USED' ) {
-	  $previously_used = $value;
-	  last;
+	my $match=0;
+	my @matches;
+	foreach my $versionar (@Apache::inputtags::previous_version) {
+	    foreach my $version (@$versionar) {
+		$matches[$version]++;
+	    }
+	}
+	foreach my $elem (@matches) {if ($elem eq ($#awards+1)) {$match=1;}}
+	if ($match) {
+	    $previously_used = 'PREVIOUSLY_LAST';
+	    foreach my $value (@Apache::inputtags::previous) {
+		if ($value eq 'PREVIOUSLY_USED' ) {
+		    $previously_used = $value;
+		    last;
+		}
+	    }
 	}
-      }
     }
     &Apache::lonxml::debug("final award $finalaward, $previously_used");
     &setgradedata($finalaward,$id,$previously_used);
@@ -418,8 +596,9 @@ sub grade {
 }
 
 sub gradestatus {
-  my ($id) = @_;
+  my ($id,$target) = @_;
   my $showbutton = 1;
+  my $bgcolor = '';
   my $message = '';
   my $latemessage = '';
   my $trystr='';
@@ -428,18 +607,22 @@ sub gradestatus {
 
   my $status = $Apache::inputtags::status['-1'];
   &Apache::lonxml::debug("gradestatus has :$status:");
-  if ( $status ne 'CLOSED' ) {  
+  if ( $status ne 'CLOSED' && $status ne 'UNAVAILABLE') {  
     my $award = $Apache::lonhomework::history{"resource.$id.award"};
     my $solved = $Apache::lonhomework::history{"resource.$id.solved"};
     my $previous = $Apache::lonhomework::history{"resource.$id.previous"};
     &Apache::lonxml::debug("Found Award |$award|$solved|");
     if ( $award ne '' ) {
       &Apache::lonxml::debug('Getting message');
-      ($showbutton,$message,$previousmsg) =
-	&decideoutput($award,$solved,$previous);
-      $message="<td bgcolor=\"#aaffaa\">$message</td>";
-      if ($previousmsg) {
-	$previousmsg="<td bgcolor=\"#ffaaaa\">$previousmsg</td>";
+      ($showbutton,$bgcolor,$message,$previousmsg) =
+	&decideoutput($award,$solved,$previous,$target);
+      if ($target eq 'tex') {
+	$message=' '.$message.' ';
+      } else {
+	$message="<td bgcolor=\"$bgcolor\">$message</td>";
+	if ($previousmsg) {
+	  $previousmsg="<td bgcolor=\"#aaaaff\">$previousmsg</td>";
+	}
       }
     }
     my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
@@ -449,22 +632,40 @@ sub gradestatus {
     if ( $maxtries eq '' ) { $maxtries = '2'; } 
     if ( $maxtries eq 'con_lost' ) { $maxtries = '0'; } 
     if ( $showbutton ) {
-      $trystr = "<td>Tries $tries/$maxtries</td>";
+      if ($target eq 'tex') {
+	  if ($ENV{'request.state'} ne "construct" && $Apache::lonhomework::type ne 'exam') {
+	      $trystr = ' {\vskip 1 mm \small \textit{Tries} '.$tries.'/'.$maxtries.'} \vskip 2 mm ';
+	  } else {
+	      $trystr = '\vskip 0 mm ';
+	  }
+      } else {
+         $trystr = "<td>Tries $tries/$maxtries</td>";
+      }
     }
     if ( $status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {$showbutton = 0;}
     if ( $showbutton ) { 
-      $button = '<br /><input type="submit" name="submit" value="Submit Answer" />';
+      if ($target ne 'tex') {
+        $button = '<br /><input type="submit" name="submit" value="Submit Answer" />';
+      }
     }
     if ($Apache::lonhomework::history{"resource.$id.afterduedate"}) {
       #last submissions was after due date
-      $latemessage="<td bgcolor=\"#ffaaaa\">The last submission was after the Due Date</td>";
+      if ($target eq 'tex') {
+	  $latemessage=' The last submission was after the Due Date ';
+      } else {
+        $latemessage="<td bgcolor=\"#ffaaaa\">The last submission was after the Due Date</td>";
+      }
     }
   }
   my $output= $previousmsg.$latemessage.$message.$trystr;
   if ($output =~ /^\s*$/) {
     return $button;
   } else {
-    return $button.'<table><tr>'.$output.'</tr></table>';
+    if ($target eq 'tex') {
+      return $button.' \vskip 0 mm '.$output.' ';
+    } else {
+      return $button.'<table><tr>'.$output.'</tr></table>';
+    }
   }
 }
 1;