--- loncom/homework/grades.pm	2001/02/07 00:29:30	1.1
+++ loncom/homework/grades.pm	2001/04/17 21:07:38	1.6
@@ -1,16 +1,271 @@
 # The LON-CAPA Grading handler
-# Guy Albertelli
-# 11/30 Gerd Kortemeyer
-# 6/1 Gerd Kortemeyer
+# 2/9,2/13 Guy Albertelli
 
 package Apache::grades;
 use strict;
 use Apache::style;
 use Apache::lonxml;
 use Apache::lonnet;
+use Apache::loncommon;
 use Apache::lonhomework;
 use Apache::Constants qw(:common);
 
+sub moreinfo {
+  my ($request,$reason) = @_;
+  $request->print("Unable to process request: $reason");
+  if ( $Apache::grades::viewgrades eq 'F' ) {
+    $request->print('<form action="/adm/grades" method="post">'."\n");
+    $request->print('<input type="hidden" name="url" value="'.$ENV{'form.url'}.'"></input>'."\n");
+    $request->print('<input type="hidden" name="command" value="'.$ENV{'form.command'}.'"></input>'."\n");
+    $request->print("Student:".'<input type="text" name="student" value="'.$ENV{'form.student'}.'"></input>'."<br />\n");
+    $request->print("Domain:".'<input type="text" name="domain" value="'.$ENV{'user.domain'}.'"></input>'."<br />\n");
+    $request->print('<input type="submit" name="submit" value="ReSubmit"></input>'."<br />\n");
+    $request->print('</form>');
+  }
+  return '';
+}
+
+
+#FIXME - needs to be much smarter
+sub finduser {
+  my ($name) = @_;
+
+  if ( $Apache::grades::viewgrades eq 'F' ) {
+    return ($name,$ENV{'user.domain'});
+  } else {
+    return ($ENV{'user.name'},$ENV{'user.domain'});
+  }
+}
+
+sub getclasslist {
+  my ($coursedomain,$coursenum,$coursehome,$hideexpired) = @_;
+  my $classlist=&Apache::lonnet::reply("dump:$coursedomain:$coursenum:classlist",$coursehome);
+  my %classlist=();
+  my $now = time;
+  foreach my $record (split /&/, $classlist) {
+    my ($name,$value)=split(/=/,&Apache::lonnet::unescape($record));
+    my ($end,$start)=split(/:/,$value);
+    # still a student?
+    if (($hideexpired) && ($end) && ($end < $now)) {
+      print "Skipping:$name:$end:$now<br />\n";
+      next;
+    }
+    push( @{ $classlist{'allids'} }, $name); 
+  }
+  return (%classlist);
+}
+
+sub getpartlist {
+  my ($url) = @_;
+  my @parts =();
+  my (@metakeys) = split(/,/,&Apache::lonnet::metadata($url,'keys'));
+  foreach my $key (@metakeys) {
+    if ( $key =~ m/stores_([0-9]+)_.*/ ) {
+      push(@parts,$key);
+    }
+  }
+  return @parts;
+}
+
+sub viewstudentgrade {
+  my ($url,$symb,$courseid,$student,@parts) = @_;
+  my $result ='';
+
+  my ($stuname,$domain) = split(/:/,$student);
+
+  my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$stuname,
+				      &Apache::lonnet::homeserver($stuname,$domain));
+
+  $result.="<tr><td>$stuname</td><td>$domain</td>\n";
+  foreach my $part (@parts) {
+    my ($temp,$part,$type)=split(/_/,$part);
+    #print "resource.$part.$type = ".$record{"resource.$part.$type"}." <br />\n";
+    if ($type eq 'awarded') {
+      my $score=$record{"resource.$part.$type"};
+      $result.="<td><input type=\"text\" name=\"GRADE.$student.$part.$type\" value=\"$score\" size=\"4\" /></td>\n";
+    } elsif ($type eq 'tries') {
+      my $score=$record{"resource.$part.$type"};
+      $result.="<td><input type=\"text\" name=\"GRADE.$student.$part.$type\" value=\"$score\" size=\"4\" /></td>\n"
+    } elsif ($type eq 'solved') {
+      my $score=$record{"resource.$part.$type"};
+      $result.="<td><select name=\"GRADE.$student.$part.$type\">\n";
+      if ($score =~ /^correct/) {
+	$result.="<option selected=\"on\">correct</option>\n<option>incorrect</option>\n<option>excused</option>\n<option>ungraded</option>\n<option>nothing</option>\n";
+      } elsif ($score =~ /^incorrect/) {
+	$result.="<option>correct</option>\n<option selected=\"on\">incorrect</option>\n<option>excused</option>\n<option>ungraded</option>\n<option>nothing</option>\n";
+      } elsif ($score eq '') {
+	$result.="<option>correct</option>\n<option>incorrect</option>\n<option>excused</option>\n<option>ungraded</option>\n<option selected=\"on\">nothing</option>\n";
+      } elsif ($score =~ /^excused/) {
+	$result.="<option>correct</option>\n<option>incorrect</option>\n<option selected=\"on\">excused</option>\n<option>ungraded</option>\n<option>nothing</option>\n";
+      } elsif ($score =~ /^ungraded/) {
+	$result.="<option>correct</option>\n<option>incorrect</option>\n<option>excused</option>\n<option selected=\"on\">ungraded</option>\n<option>nothing</option>\n";
+      }
+      $result.="</select></td>\n";
+    }
+  }
+  $result.='</tr>';
+  return $result;
+}
+#FIXME need to look at the meatdata <stores> spec on what type of data to accept and provide an
+#interface based on that, also do that to above function.
+sub setstudentgrade {
+  my ($url,$symb,$courseid,$student,@parts) = @_;
+
+  my $result ='';
+
+  my ($stuname,$domain) = split(/:/,$student);
+
+  my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$stuname,
+				      &Apache::lonnet::homeserver($stuname,$domain));
+  my %newrecord;
+
+  foreach my $part (@parts) {
+    my ($temp,$part,$type)=split(/_/,$part);
+    my $oldscore=$record{"resource.$part.$type"};
+    my $newscore=$ENV{"form.GRADE.$student.$part.$type"};
+    if ($type eq 'solved') {
+      my $update=0;
+      if ($newscore eq 'nothing' ) {
+	if ($oldscore ne '') {
+	  $update=1;
+	  $newscore = '';
+	}
+      } elsif ($oldscore !~ m/^$newscore/) {
+	$update=1;
+	$result.="Updating $stuname to $newscore<br />\n";
+	if ($newscore eq 'correct') { $newscore = 'correct_by_override'; }
+	if ($newscore eq 'incorrect') { $newscore = 'incorrect_by_override'; }
+	if ($newscore eq 'excused') { $newscore = 'excused'; }
+	if ($newscore eq 'ungraded') { $newscore = 'ungraded_attempted'; }
+      } else {
+	#$result.="$stuname:$part:$type:unchanged  $oldscore to $newscore:<br />\n";
+      }
+      if ($update) { $newrecord{"resource.$part.$type"}=$newscore; }
+    } else {
+      if ($oldscore ne $newscore) {
+	$newrecord{"resource.$part.$type"}=$newscore;
+	$result.="Updating $student"."'s status for $part.$type to $newscore<br />\n";
+      } else {
+	#$result.="$stuname:$part:$type:unchanged  $oldscore to $newscore:<br />\n";
+      }
+    }
+  }
+  if ( scalar(keys(%newrecord)) > 0 ) {
+    $newrecord{"resource.regrader"}="$ENV{'user.name'}:$ENV{'user.domain'}";
+    &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$stuname,
+			    &Apache::lonnet::homeserver($stuname,$domain));
+    $result.="Stored away ".scalar(keys(%newrecord))." elements.<br />\n";
+  }
+  return $result;
+}
+
+sub submission {
+  my ($request) = @_;
+  my $url=$ENV{'form.url'};
+  $url=~s-^http://($ENV{'SERVER_NAME'}|$ENV{'HTTP_HOST'})--;
+  if ($ENV{'form.student'} eq '') { &moreinfo($request,"Need student login id"); return ''; }
+  my ($uname,$udom) = &finduser($ENV{'form.student'});
+  if ($uname eq '') { &moreinfo($request,"Unable to find student"); return ''; }
+  my $symb=&Apache::lonnet::symbread($url);
+  if ($symb eq '') { $request->print("Unable to handle ambiguous references:$url:."); return ''; }
+  my $home=&Apache::lonnet::homeserver($uname,$udom);
+  my $answer=&Apache::loncommon::get_previous_attempt($symb,$uname,$udom,$home,
+						      $ENV{'request.course.id'});
+  my $result="<h2> Submission Record </h2>  $uname:$udom for $url".$answer;
+  return $result;
+}
+
+sub viewgrades {
+  my ($request) = @_;
+  my $result='';
+
+  #get resource reference
+  my $url=$ENV{'form.url'};
+  $url=~s-^http://($ENV{'SERVER_NAME'}|$ENV{'HTTP_HOST'})--;
+  my $symb=$ENV{'form.symb'};
+  if (!$symb) { $symb=&Apache::lonnet::symbread($url); }
+  if ($symb eq '') { $request->print("Unable to handle ambiguous references:$url:."); return ''; }
+
+  #get classlist
+  my ($cdom,$cnum) = split(/_/,$ENV{'request.course.id'});
+  my $chome=$ENV{"course.$ENV{'request.course.id'}.home"};
+  #print "Found $cdom:$cnum:$chome<br />";
+  my (%classlist) = &getclasslist($cdom,$cnum,$chome,'0');
+
+
+  #get list of parts for this problem
+  my (@parts) = &getpartlist($url);
+
+  #start the form
+  $result = '<form action="/adm/grades" method="post">'."\n".
+    '<input type="hidden" name="symb" value="'.$symb.'"/>'."\n".
+      '<input type="hidden" name="url" value="'.$url.'"/>'."\n".
+	'<input type="hidden" name="command" value="editgrades" />'."\n".
+	  '<input type="submit" name="submit" value="Submit Changes" />'."\n".
+	    '<table>'."\n".
+	      '<tr><td>UserId</td><td>Domain</td>'."\n";
+  foreach my $part (@parts) {
+     my $display=&Apache::lonnet::metadata($url,$part.'.display');
+     if  (!$display) { $display = &Apache::lonnet::metadata($url,$part.'.name'); }
+     $result.="<td>$display</td>\n";
+   }
+  $result.="</tr>";
+  #get info for each student
+  foreach my $student ( sort(@{ $classlist{'allids'} }) ) {
+    $result.=&viewstudentgrade($url,$symb,$ENV{'request.course.id'},$student,@parts);
+  }
+  $result.='</table><input type="submit" name="submit" value="Submit Changes" /></form>';
+
+  return $result;
+}
+
+sub editgrades {
+  my ($request) = @_;
+  my $result='';
+
+  my $symb=$ENV{'form.symb'};
+  if ($symb eq '') { $request->print("Unable to handle ambiguous references:$symb:$ENV{'form.url'}"); return ''; }
+  my $url=$ENV{'form.url'};
+  #get classlist
+  my ($cdom,$cnum) = split(/_/,$ENV{'request.course.id'});
+  my $chome=$ENV{"course.$ENV{'request.course.id'}.home"};
+  #print "Found $cdom:$cnum:$chome<br />";
+  my (%classlist) = &getclasslist($cdom,$cnum,$chome,'0');
+
+  #get list of parts for this problem
+  my (@parts) = &getpartlist($url);
+
+  $result.='<form action="/adm/grades" method="post">'."\n".
+    '<input type="hidden" name="symb" value="'.$symb.'" />'."\n".
+      '<input type="hidden" name="url" value="'.$url.'" />'."\n".
+	'<input type="hidden" name="command" value="viewgrades" />'."\n".
+	  '<input type="submit" name="submit" value="See Grades" /> <br />'."\n";
+
+  foreach my $student ( sort(@{ $classlist{'allids'} }) ) {
+    $result.=&setstudentgrade($url,$symb,$ENV{'request.course.id'},$student,@parts);
+  }
+
+  $result.='<input type="submit" name="submit" value="See Grades" /></table></form>';
+  return $result;
+}
+
+sub send_header {
+  my ($request)= @_;
+  $request->print(&Apache::lontexconvert::header());
+#  $request->print("
+#<script>
+#remotewindow=open('','homeworkremote');
+#remotewindow.close();
+#</script>"); 
+  $request->print('<body bgcolor="#FFFFFF">');
+}
+
+sub send_footer {
+  my ($request)= @_;
+  $request->print('</body>');
+  $request->print(&Apache::lontexconvert::footer());
+}
+
 sub handler {
   my $request=$_[0];
 
@@ -24,12 +279,25 @@ sub handler {
   $request->send_http_header;
   return OK if $request->header_only;
   my $url=$ENV{'form.url'};
-  if ($url eq '') {
-    $request->print("Non-Contextual Access Unsupported");
+  my $symb=$ENV{'form.symb'};
+  my $command=$ENV{'form.command'};
+  
+  &send_header($request);
+  if ($url eq '' && $symb eq '') {
+    $request->print("Non-Contextual Access Unsupported:$command:$url:");
   } else {
-    $Apache::grades::viewgrades=&Apache::lonnet::allowed('vgr',$url);
+    $Apache::grades::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
+    if ($command eq 'submission') {
+      $request->print(&submission($request));
+    } elsif ($command eq 'viewgrades') {
+      $request->print(&viewgrades($request));
+    } elsif ($command eq 'editgrades') {
+      $request->print(&editgrades($request));
+    } else {
+      $request->print("Unknown action:$command:");
+    }
   }
-
+  &send_footer($request);
   return OK;
 }