--- loncom/homework/grades.pm	2014/08/25 22:12:58	1.725
+++ loncom/homework/grades.pm	2014/11/08 18:26:01	1.726
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Grading handler
 #
-# $Id: grades.pm,v 1.725 2014/08/25 22:12:58 raeburn Exp $
+# $Id: grades.pm,v 1.726 2014/11/08 18:26:01 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1295,10 +1295,8 @@ sub sub_page_js {
 			    }
 			}
 		    }
-		    
 		}
 	    }
-	    
 	}
 	formname.submit();
     }
@@ -2321,10 +2319,12 @@ sub submission {
   
     } 
     if ($env{'form.lastSub'} =~ /^(last|all)$/) {
+        my $identifier = (&canmodify($usec)? $counter : '');
         $request->print(&Apache::loncommon::get_previous_attempt($symb,$uname,$udom,
 								 $env{'request.course.id'},
 								 $last,'.submission',
-								 'Apache::grades::keywords_highlight'));
+								 'Apache::grades::keywords_highlight',
+                                                                 $usec,$identifier));
     }
     $request->print('<input type="hidden" name="unamedom'.$counter.'" value="'.$uname.':'
 	.$udom.'" />'."\n");
@@ -2774,7 +2774,8 @@ sub processHandGrade {
 	my $ctr = 0;
 	while ($ctr < $ngrade) {
 	    my ($uname,$udom) = split(/:/,$env{'form.unamedom'.$ctr});
-	    my ($errorflag,$pts,$wgt) = &saveHandGrade($request,$symb,$uname,$udom,$ctr);
+	    my ($errorflag,$pts,$wgt,$numhidden) = 
+                &saveHandGrade($request,$symb,$uname,$udom,$ctr);
 	    if ($errorflag eq 'no_score') {
 		$ctr++;
 		next;
@@ -2787,6 +2788,12 @@ sub processHandGrade {
 		$ctr++;
 		next;
 	    }
+            if ($numhidden) {
+                $request->print(
+                    '<span class="LC_info">'
+                   .&mt('For [_1]: [quant,_2,transaction] hidden',"$uname:$udom",$numhidden)
+                   .'</span><br />');
+            }
 	    my $includemsg = $env{'form.includemsg'.$ctr};
 	    my ($subject,$message,$msgstatus) = ('','','');
 	    my $restitle = &Apache::lonnet::gettitle($symb);
@@ -3008,9 +3015,13 @@ sub saveHandGrade {
     my %record = &Apache::lonnet::restore($symb,$env{'request.course.id'},$domain,$stuname);
     my @parts_graded;
     my %newrecord  = ();
-    my ($pts,$wgt) = ('','');
+    my ($pts,$wgt,$totchg) = ('','',0);
     my %aggregate = ();
     my $aggregateflag = 0;
+    if ($env{'form.HIDE'.$newflg}) {
+        my $numchgs = &makehidden($newflg,\%record,$symb,$domain,$stuname);
+        $totchg += $numchgs;
+    }
     my @parts = split(/:/,$env{'form.partlist'.$newflg});
     foreach my $new_part (@parts) {
 	#collaborator ($submi may vary for different parts
@@ -3113,7 +3124,38 @@ sub saveHandGrade {
         &Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
 			      $cdom,$cnum);
     }
-    return ('',$pts,$wgt);
+    return ('',$pts,$wgt,$totchg);
+}
+
+sub makehidden {
+    my ($newflg,$record,$symb,$domain,$stuname) = @_;
+    return unless (ref($record) eq 'HASH');
+    my %modified;
+    my $numchanged = 0;
+    my ($version,$parts) = split(/:/,$env{'form.HIDE'.$newflg},2);
+    if (exists($record->{$version.':keys'})) {
+        my $partsregexp = $parts;
+        $partsregexp =~ s/,/|/g;
+        foreach my $key (split(/\:/,$record->{$version.':keys'})) {
+            if ($key =~ /^resource\.(?:$partsregexp)\.([^\.]+)$/) {
+                 my $item = $1;
+                 unless (($item eq 'solved') || ($item =~ /^award(|msg|ed)$/)) {
+                     $modified{$key} = $record->{$version.':'.$key};
+                 }
+            } elsif ($key =~ m{^(resource\.(?:$partsregexp)\.[^\.]+\.)(.+)$}) {
+                $modified{$1.'hidden'.$2} = $record->{$version.':'.$key};
+            } elsif ($key =~ /^(ip|timestamp|host)$/) {
+                $modified{$key} = $record->{$version.':'.$key};
+            }
+        }
+        if (keys(%modified)) {
+            if (&Apache::lonnet::putstore($env{'request.course.id'},$symb,$version,\%modified,
+                                          $domain,$stuname) eq 'ok') {
+                $numchanged ++;
+            }
+        }
+    }
+    return $numchanged;
 }
 
 sub check_and_remove_from_queue {
@@ -4781,9 +4823,11 @@ sub displayPage {
 		}
 	    } elsif ($env{'form.lastSub'} eq 'all') {
 		my $last = ($env{'form.lastSub'} eq 'last' ? 'last' : '');
+                my $identifier = (&canmodify($usec)? $prob : ''); 
 		$studentTable.=&Apache::loncommon::get_previous_attempt($symbx,$uname,$udom,
 									$env{'request.course.id'},
-									'','.submission');
+									'','.submission',undef,
+                                                                        $usec,$identifier);
  
 	    }
 	    if (&canmodify($usec)) {
@@ -4996,7 +5040,7 @@ sub updateGradeByPage {
 
     $iterator->next(); # skip the first BEGIN_MAP
     my $curRes = $iterator->next(); # for "current resource"
-    my ($depth,$question,$prob,$changeflag)= (1,1,1,0);
+    my ($depth,$question,$prob,$changeflag,$hideflag)= (1,1,1,0,0);
     while ($depth > 0) {
         if($curRes == $iterator->BEGIN_MAP) { $depth++; }
         if($curRes == $iterator->END_MAP) { $depth--; }
@@ -5017,6 +5061,11 @@ sub updateGradeByPage {
 	    my @displayPts=();
             my %aggregate = ();
             my $aggregateflag = 0;
+            if ($env{'form.HIDE'.$prob}) {
+                my %record = &Apache::lonnet::restore($symbx,$env{'request.course.id'},$udom,$uname);
+                my $numchgs = &makehidden($prob,\%record,$symbx,$udom,$uname);
+                $hideflag += $numchgs;
+            }
 	    foreach my $partid (@{$parts}) {
 		my $newpts = $env{'form.GD_BOX'.$question.'_'.$partid};
 		my $oldpts = $env{'form.oldpts'.$question.'_'.$partid};
@@ -5107,8 +5156,11 @@ sub updateGradeByPage {
     $studentTable.=&Apache::loncommon::end_data_table();
     my $grademsg=($changeflag == 0 ? &mt('No score was changed or updated.') :
 		  &mt('The scores were changed for [quant,_1,problem].',
-		  $changeflag));
-    $request->print($grademsg.$studentTable);
+		  $changeflag).'<br />');
+    my $hidemsg=($hideflag == 0 ? '' :
+                 &mt('Submissions were marked "hidden" for [quant,_1,transaction].',
+                     $hideflag).'<br />');
+    $request->print($hidemsg.$grademsg.$studentTable);
 
     return '';
 }