# The LearningOnline Network with CAPA
# input  definitons
#
# $Id: inputtags.pm,v 1.114.2.1 2003/09/23 01:52:57 albertel 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/
#
# 2/19 Guy 

package Apache::inputtags;
use HTML::Entities();
use strict;
use Apache::loncommon;

BEGIN {
  &Apache::lonxml::register('Apache::inputtags',('hiddenline','textfield','textline'));
}


sub initialize_inputtags {
  # list of current input ids
  @Apache::inputtags::input=();
  # list of all input ids seen in this problem
  @Apache::inputtags::inputlist=();
  # list of all current response ids
  @Apache::inputtags::response=();
  # list of all response ids seen in this problem
  @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=();
  # hash of defined params for the current response
  %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 {
  my ($parstack,$safeeval)=@_;
  my $id = &Apache::lonxml::get_param('id',$parstack,$safeeval);
  if ($id eq '') { $id = $Apache::lonxml::curdepth; }
  push (@Apache::inputtags::input,$id);
  push (@Apache::inputtags::inputlist,$id);
  return $id;
}

sub end_input {
  pop @Apache::inputtags::input;
  return '';
}

sub start_textfield {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  my $result = "";
  my $id = &start_input($parstack,$safeeval);
  my $resid=$Apache::inputtags::response[-1];
  if ($target eq 'web') {
    $Apache::lonxml::evaluate--;
    if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
	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",$parser);
	}
    } else {
	#right or wrong don't show it
	#$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);
    if ($seedtext eq $ENV{'form.HWVAL_'.$resid}) {
      # if the seed text is still there it wasn't a real submission
      $ENV{'form.HWVAL_'.$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);
    $result.=&Apache::edit::editfield($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,
						 $safeeval,'rows','cols');
    if ($constructtag) {
      $result = &Apache::edit::rebuild_tag($token);
    } 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;
}

sub end_textfield {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  my $result;
  if ($target eq 'web') {
    $Apache::lonxml::evaluate++;
    if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
      return "</textarea>";
    }
  } elsif ($target eq 'edit') {
    $result=&Apache::edit::end_table();
  }
  &end_input;
  return $result;
}

sub start_textline {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  my $result = "";
  if ($target eq 'web') {
    $Apache::lonxml::evaluate--;
    my $partid=$Apache::inputtags::part;
    my $id=$Apache::inputtags::response[-1];
    if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
      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="'.$maxlength.'" />';
      }
    } else {
      #right or wrong don't show what was last typed in.
      #$result='<i>'.$oldresponse.'</i>';
      $result='';
    }
  } elsif ($target eq 'edit') {
    $result=&Apache::edit::tag_start($target,$token);
    $result.=&Apache::edit::text_arg('Size:','size',$token,'5')."</td></tr>";
    $result.=&Apache::edit::end_table;
  } elsif ($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;
}

sub end_textline {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  if    ($target eq 'web') { $Apache::lonxml::evaluate++; }
  elsif ($target eq 'edit') { return ('','no'); }
  return "";
}

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_hiddenline {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  if    ($target eq 'web') { $Apache::lonxml::evaluate++; }
  elsif ($target eq 'edit') { return ('','no'); }
  return "";
}

sub finalizeawards {
  my $result='';
  my $award;
  if ($#_ == '-1') { $result = "NO_RESPONSE"; }
  if ($result eq '' ) {
    my $blankcount;
    foreach $award (@_) {
      if ($award eq '') {
	$result='MISSING_ANSWER';
	$blankcount++;
      }
    }
    if ($blankcount == ($#_ + 1)) { $result = 'NO_RESPONSE'; }
  }
  if ($result eq '' ) {
    foreach $award (@_) { if ($award eq 'MISSING_ANSWER') {$result='MISSING_ANSWER'; last;}}
  }
  if ($result eq '' ) {
    foreach $award (@_) { if ($award eq 'ERROR') {$result='ERROR'; last;}}
  }
  if ($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' ||
	  $award eq 'NO_UNIT' ||
	  $award eq 'UNIT_NOTNEEDED') {
	$result=$award; last;
      }
    }
  }
  if ($result eq '' ) {
    foreach $award (@_) { 
      if ($award eq 'WANTED_NUMERIC' || 
	  $award eq 'BAD_FORMULA') {$result=$award; last;}
    }
  }
  if ($result eq '' ) {
    foreach $award (@_) { if ($award eq 'SIG_FAIL') {$result=$award; last;} }
  }
  if ($result eq '' ) {
    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'; }
  return $result
}

sub decideoutput {
  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      ($solved =~ /^correct/) {
      if ($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') { 
	      $message.=(($target eq 'web')?'<br />':' ').
		  'Your receipt is '.&Apache::lonnet::receipt().
       (($target eq 'web')?&Apache::loncommon::help_open_topic('Receipt'):'');
	  }
      }
      $bgcolor=$possiblecolors{'correct'};
      $button=0;
      $previousmsg='';
  } elsif ($solved =~ /^excused/) {
      if ($target eq 'tex') {
	  $message = ' \textbf{You are excused from the problem.} ';
      } else {
	  $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') { 
	      $message.=(($target eq 'web')?'<br />':' ').
		  'Your receipt is '.&Apache::lonnet::receipt().
       (($target eq 'web')?&Apache::loncommon::help_open_topic('Receipt'):'');
	  }
	  $bgcolor=$possiblecolors{'correct'};
	  $button=0;
	  $previousmsg='';
      }
  } elsif ($award eq 'NO_RESPONSE') {
      $message = '';
      $bgcolor=$possiblecolors{'no_feedback'};
      $button=1;
  } elsif ($award eq 'MISSING_ANSWER') {
      $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";
      $bgcolor=$possiblecolors{'not_charged_try'};
      $button=1;
  } elsif ($award eq 'MISORDERED_RANK') {
      $message = 'You have provided an invalid ranking';
      if ($target ne 'tex') {
	  $message.=', 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";
      $bgcolor=$possiblecolors{'not_charged_try'};
      $button=1;
  } elsif ($award eq 'UNIT_FAIL') {
      $message = "Units incorrect. ";
      if ($target ne 'tex') {$message.=&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";
      $bgcolor=$possiblecolors{'not_charged_try'};
      $button=1;
  } elsif ($award eq 'NO_UNIT') {
      $message = "Units required";
      if ($target ne 'tex') {$message.=&Apache::loncommon::help_open_topic('Physical_Units')};
      $bgcolor=$possiblecolors{'not_charged_try'};
      $button=1;
  } elsif ($award eq 'BAD_FORMULA') {
      $message = "Unable to understand formula";
      $bgcolor=$possiblecolors{'not_charged_try'};
      $button=1;
  } elsif ($award eq 'INCORRECT') {
      $message = "Incorrect";
      $bgcolor=$possiblecolors{'charged_try'};
      $button=1;
  } elsif ($award eq 'SUBMITTED') {
      $message = "Your submission has been recorded.";
      $bgcolor=$possiblecolors{'correct'};
      $button=1;
  } elsif ($award eq 'DRAFT') {
      $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";
      $button=1;
  }
  if (lc($Apache::lonhomework::problemstatus) eq 'no'  && 
      $Apache::inputtags::status[-1] ne 'SHOW_ANSWER') {
      $message = "Answer Submitted";
      $bgcolor=$possiblecolors{'correct'};
      $button=1;
  }
  return ($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' &&
      $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
    $Apache::lonhomework::results{"resource.$id.afterduedate"}=$award;
    return '';
  } elsif ( $Apache::lonhomework::history{"resource.$id.solved"} !~
       /^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 '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"} =
	$solvemsg;
      $Apache::lonhomework::results{"resource.$id.awarded"} = '1';
    } elsif ( $award eq 'INCORRECT' ) {
      $Apache::lonhomework::results{"resource.$id.tries"} =
	$Apache::lonhomework::history{"resource.$id.tries"} + 1;
      $Apache::lonhomework::results{"resource.$id.solved"} =
	'incorrect_attempted'
    } elsif ( $award eq 'SUBMITTED' ) {
      $Apache::lonhomework::results{"resource.$id.tries"} =
	$Apache::lonhomework::history{"resource.$id.tries"} + 1;
      $Apache::lonhomework::results{"resource.$id.solved"} =
	'ungraded_attempted';
    } elsif ( $award eq 'DRAFT' ) {
      $Apache::lonhomework::results{"resource.$id.solved"} = '';
    } elsif ( $award eq 'NO_RESPONSE' ) {
	#no real response so delete any data that got stored
	&removealldata($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 ( $previously_used eq 'PREVIOUSLY_USED') {
	if (lc($Apache::lonhomework::problemstatus) ne 'no') {
	    delete($Apache::lonhomework::results{"resource.$id.tries"});
	    $Apache::lonhomework::results{"resource.$id.previous"} = '1';
	}
    } elsif ( $previously_used eq 'PREVIOUSLY_LAST') {
      #delete all data as they student didn't do anything, but save
      #the list of collaborators.
      &removealldata($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;
}

sub grade {
  my ($target) = @_;
  my $id = $Apache::inputtags::part;
  my $response='';
  if ( defined $ENV{'form.submitted'}) {
    my @awards = ();
    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 $id");
      push (@awards,$value);
    }
    my $finalaward = &finalizeawards(@awards);
    my $previously_used;
    if ( $#Apache::inputtags::previous eq $#awards ) {
	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);
  }
  return '';
}

sub gradestatus {
  my ($id,$target) = @_;
  my $showbutton = 1;
  my $bgcolor = '';
  my $message = '';
  my $latemessage = '';
  my $trystr='';
  my $button='';
  my $previousmsg='';

  my $status = $Apache::inputtags::status['-1'];
  &Apache::lonxml::debug("gradestatus has :$status:");
  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 '' || $solved ne '') {
      &Apache::lonxml::debug('Getting message');
      ($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"};
    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
    &Apache::lonxml::debug("got maxtries of :$maxtries:");
    if ( $tries eq '' ) { $tries = '0'; }
    if ( $maxtries eq '' ) { $maxtries = '2'; } 
    if ( $maxtries eq 'con_lost' ) { $maxtries = '0'; } 
    if ( $showbutton ) {
      if ($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 ( $showbutton ) { 
      if ($target ne 'tex') {
        $button = '<br /><input type="submit" name="submit" value="Submit Answer" />';
      }
    }
    if ($Apache::lonhomework::history{"resource.$id.afterduedate"}) {
      #last submissions was after due date
      if ($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 $button;
  } else {
    if ($target eq 'tex') {
      return $button.' \vskip 0 mm '.$output.' ';
    } else {
      return $button.'<table><tr>'.$output.'</tr></table>';
    }
  }
}
1;
__END__