--- loncom/homework/inputtags.pm	2001/07/13 14:02:35	1.38
+++ loncom/homework/inputtags.pm	2003/01/13 21:22:43	1.78
@@ -1,12 +1,38 @@
 # The LearningOnline Network with CAPA
 # input  definitons
+#
+# $Id: inputtags.pm,v 1.78 2003/01/13 21:22:43 sakharuk 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;
 
-sub BEGIN {
-  &Apache::lonxml::register('Apache::inputtags',('textarea','textline','datasubmission'));
+BEGIN {
+  &Apache::lonxml::register('Apache::inputtags',('textfield','textline'));
 }
 
 
@@ -17,15 +43,21 @@ sub initialize_inputtags {
   @Apache::inputtags::inputlist=();
   # list of all current response ids
   @Apache::inputtags::response=();
-  #list of all response ids seen in this problem
+  # 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 problem date statuses, the first element is for <problem> 
-  #if there is a second element it is for the current <part>
+  # 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
+  # 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=();
 }
 
 sub start_input {
@@ -42,80 +74,141 @@ sub end_input {
   return '';
 }
 
-sub start_textarea {
+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') {
-    my $oldresponse = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.$Apache::inputtags::response['-1'].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; }
-    $result= '<textarea name="HWVAL'.$Apache::inputtags::response['-1'].'" '.
-      "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("/textarea",$$parser[$#$parser]);
+    $Apache::lonxml::evaluate--;
+    if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
+	my $partid=$Apache::inputtags::part;
+	my $oldresponse = &HTML::Entities::encode($Apache::lonhomework::history{"resource.$partid.$resid.submission"});
+	my $cols = &Apache::lonxml::get_param('cols',$parstack,$safeeval);
+	if ( $cols eq '') { $cols = 80; }
+	my $rows = &Apache::lonxml::get_param('rows',$parstack,$safeeval);
+	if ( $rows eq '') { $rows = 10; }
+	$result= '<textarea name="HWVAL'.$resid.'" '.
+	    "rows=\"$rows\" cols=\"$cols\">".$oldresponse;
+	if ($oldresponse ne '') {
+	    #get rid of any startup text if the user has already responded
+	    &Apache::lonxml::get_all_text("/textfield",$$parser[-1]);
+	}
+    } 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",$$parser[-1]);
+    }
+  } elsif ($target eq 'grade') {
+    my $seedtext=&Apache::lonxml::get_all_text("/textfield",$$parser[-1]);
+    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",$$parser[-1]);
+    $result.=&Apache::edit::editfield($token->[1],$bodytext,'Text you want to appear by default:',80,2);
+  } elsif ($target eq 'modified') {
+    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+						 $safeeval,'rows','cols');
+    if ($constructtag) {
+      $result = &Apache::edit::rebuild_tag($token);
+    } else {
+      $result=$token->[4];
     }
+    $result.=&Apache::edit::modifiedfield();
+  } elsif ($target eq 'tex') {
+      if ($$tagstack[-2] eq 'essayresponse' and $Apache::lonhomework::type eq 'exam') {
+	  my $number_of_lines= &Apache::lonxml::get_param('rows',$parstack,$safeeval);
+	  $result = '\fbox{\fbox{\parbox{\textwidth-5mm}{';
+	for (my $i=0;$i<int $number_of_lines*2;$i++) {$result.='\strut \\\\ ';}
+	$result.='\strut \\\\\strut \\\\\strut \\\\\strut \\\\}}}';
+      }
   }
   return $result;
 }
 
-sub end_textarea {
+sub end_textfield {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+  my $result;
   if ($target eq 'web') {
-    return "</textarea>";
-  } 
+    $Apache::lonxml::evaluate++;
+    if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
+      return "</textarea>";
+    }
+  } elsif ($target eq 'edit') {
+    $result=&Apache::edit::end_table();
+  }
   &end_input;
-  return '';
+  return $result;
 }
 
 sub start_textline {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $result = "";
   if ($target eq 'web') {
-    my $size = &Apache::lonxml::get_param('size',$parstack,$safeeval);
-    if ($size eq '') { $size=20; }
-    my $oldresponse = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.$Apache::inputtags::response['-1'].submission"};
-    $result= '<input type="text" name="HWVAL'.$Apache::inputtags::response['-1'].'" value="'.$oldresponse.'" size="'.$size.'" />';
-  }
-  if ($target eq 'edit') {
-    $result.=&Apache::edit::tag_start($target,$token,&Apache::lonxml::description($token));
+    $Apache::lonxml::evaluate--;
+    if ($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 $partid=$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') {
+        $result= '<input type="text" name="HWVAL'.$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>";
     $result.=&Apache::edit::end_table;
-  }
-  if ($target eq 'modified') {
+  } 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 ($target eq 'edit') { return ('','no'); }
+  if    ($target eq 'web') { $Apache::lonxml::evaluate++; }
+  elsif ($target eq 'edit') { return ('','no'); }
   return "";
 }
 
-sub start_datasubmission {
-  return '';
-}
-
-sub end_datasubmission {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-  if ( $target == 'web' ) {
-    return '<input type="submit" name="submit" value="Submit All Data" />';
-  }
-  return '';
-}
-
 sub finalizeawards {
   my $result='';
   my $award;
   if ($#_ == '-1') { $result = "NO_RESPONSE"; }
   if ($result eq '' ) {
-    foreach $award (@_) { if ($award eq '') {$result='MISSING_ANSWER'; last;}}
+    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;}}
@@ -146,6 +239,9 @@ sub finalizeawards {
     foreach $award (@_) { if ($award eq 'INCORRECT') {$result=$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 '' ) {
@@ -156,16 +252,27 @@ sub finalizeawards {
 }
 
 sub decideoutput {
-  my ($award,$solved)=@_;
+  my ($award,$solved,$previous,$target)=@_;
   my $message='';
   my $button=0;
+  my $previousmsg;
+
+  if ($previous) { $previousmsg='You have entered that answer before'; }
+
   if      ($solved =~ /^correct/) {
-    $message = "<b>You are correct.</b> Your receipt is ".
+    if ($target eq 'tex') {
+      $message = '\textbf{You are correct}. Your receipt is '.
+      &Apache::lonnet::receipt;
+    } else {
+      $message = "<b>You are correct.</b> Your receipt is ".
       &Apache::lonnet::receipt;
+    }
     $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";
@@ -174,6 +281,7 @@ sub decideoutput {
       $message = "<b>You are correct.</b> Your receipt is ".
 	&Apache::lonnet::receipt;
       $button=0;
+      $previousmsg='';
     }
   } elsif ($award eq 'NO_RESPONSE') {
     $message = '';
@@ -205,34 +313,73 @@ sub decideoutput {
   } elsif ($award eq 'SUBMITTED') {
     $message = "Your submission has been recorded.";
     $button=1;
+  } elsif ($award eq 'DRAFT') {
+    $message = "A draft copy has been saved.";
+    $button=1;
   } else {
     $message = "Unknown message: $award";
     $button=1;
   }
-  return ($button,$message);
+  return ($button,$message,$previousmsg);
 }
 
 sub setgradedata {
-  my ($award,$id) = @_;
-  if ( $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';
-    $Apache::lonhomework::results{"resource.$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';
-  } else {
-    $Apache::lonhomework::results{"resource.$id.solved"} =
-      'incorrect_attempted';
+  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/ ) {
+    #handle assignment of tries and solved status
+    if ($Apache::lonhomework::history{"resource.$id.afterduedate"}) {
+      $Apache::lonhomework::results{"resource.$id.afterduedate"}='';
+    }
+    if ( $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';
+      $Apache::lonhomework::results{"resource.$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' ) {
+      return '';
+    } else {
+      $Apache::lonhomework::results{"resource.$id.solved"} =
+	'incorrect_attempted';
+    }
+
+    # 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';
+    } 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});
+	}
+      }
+      #and since they didn't do anything we were never here
+      return '';
+    } else {
+      $Apache::lonhomework::results{"resource.$id.previous"} = '0';
+    }
   }
   $Apache::lonhomework::results{"resource.$id.award"} = $award;
 }
@@ -240,47 +387,70 @@ sub setgradedata {
 sub grade {
   my ($target) = @_;
   my $id = $Apache::inputtags::part;
-#  my $result='';
   my $response='';
-  if ( $target == 'web' ) {
-    if ( defined $ENV{'form.submitted'}) {
-      my @awards = ();
-      &Apache::lonxml::debug("$#Apache::inputtags::responselist");
-      foreach $response (@Apache::inputtags::responselist) {
-	&Apache::lonxml::debug("looking for response.$id.$response.awarddetail");
-	my $value=$Apache::lonhomework::results{"resource.$id.$response.awarddetail"};
-	if ( $value ne '' ) {
-	  &Apache::lonxml::debug("keeping $value from $response for $id");
-	  push (@awards,$value);
-	} else {
-	  &Apache::lonxml::debug("skipping $value from $response for $id");
+  if ( defined $ENV{'form.submitted'}) {
+    my @awards = ();
+    foreach $response (@Apache::inputtags::responselist) {
+      &Apache::lonxml::debug("looking for response.$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;
+		}
+	    }
 	}
-      }
-      my $finalaward = &finalizeawards(@awards);
-      &Apache::lonxml::debug("final award $finalaward");
-      &setgradedata($finalaward,$id);
     }
+    &Apache::lonxml::debug("final award $finalaward, $previously_used");
+    &setgradedata($finalaward,$id,$previously_used);
   }
   return '';
 }
 
 sub gradestatus {
-  my ($id) = @_;
+  my ($id,$target) = @_;
   my $showbutton = 1;
   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' ) {  
+  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,$message) = &decideoutput($award,$solved);
-      $message="<br /><table bgcolor=\"#aaffaa\"><tr><td>$message</td></tr></table>";
+      ($showbutton,$message,$previousmsg) =
+	&decideoutput($award,$solved,$previous,$target);
+      if ($target eq 'tex') {
+	$message=' '.$message.' ';
+      } else {
+	$message="<td bgcolor=\"#aaffaa\">$message</td>";
+	if ($previousmsg) {
+	  $previousmsg="<td bgcolor=\"#ffaaaa\">$previousmsg</td>";
+	}
+      }
     }
     my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
     my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
@@ -289,14 +459,39 @@ sub gradestatus {
     if ( $maxtries eq '' ) { $maxtries = '2'; } 
     if ( $maxtries eq 'con_lost' ) { $maxtries = '0'; } 
     if ( $showbutton ) {
-      $trystr = "<br />Tries $tries/$maxtries";
+      if ($target eq 'tex') {
+	  if ($ENV{'request.state'} ne "construct") {
+	      $trystr = ' {\small \textit{Tries} '.$tries.'/'.$maxtries.'} \vskip 0 mm ';
+	  }
+      } else {
+         $trystr = "<td>Tries $tries/$maxtries</td>";
+      }
     }
     if ( $status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {$showbutton = 0;}
     if ( $showbutton ) { 
-      $button = '<br /><input type="submit" name="submit" value="Submit All Answers" />';
+      if ($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>';
     }
   }
-  return $button.$message.$trystr;
 }
 1;
 __END__