--- loncom/homework/grades.pm	2001/02/13 18:41:00	1.3
+++ loncom/homework/grades.pm	2001/08/06 16:37:58	1.12
@@ -1,5 +1,14 @@
-# The LON-CAPA Grading handler
-# 2/9 Guy Albertelli
+# The LON-CAPA grading handler.
+#
+# Handles the viewing of grades.
+#
+# YEAR=2001
+# 2/7,2/9,2/13,4/16,4/17,5/1 Guy Albertelli
+# 6/8 Gerd Kortemeyer
+# 7/26 Guy Albertelli
+# 7/27 H.K. Ng
+# 7/30 Guy Albertelli
+# 8/6 Scott Harrison
 
 package Apache::grades;
 use strict;
@@ -10,83 +19,413 @@ use Apache::loncommon;
 use Apache::lonhomework;
 use Apache::Constants qw(:common);
 
+# ======================================================== Get more information
 sub moreinfo {
-  my ($request,$reason) = @_;
-  $request->print("Unable to process request: $reason");
-  $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");
-  $request->print('</form>');
+    my ($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 '';
 }
 
+# ========================================= Displays the class list of students
+sub listStudents {
+    my ($request) = shift;
+    my ($cdom,$cnum) = split(/_/,$ENV{'request.course.id'});
+    my $chome = $ENV{"course.$ENV{'request.course.id'}.home"};
+    $request->print ("Found $cdom:$cnum:$chome<br />");
+    my (%classlist) = &getclasslist($cdom,$cnum,$chome,'0');
+    foreach my $student ( sort(@{ $classlist{'allids'} }) ) {
+	my ($sname,$sdom) = split(/:/,$student);
+	my $reply = &Apache::lonnet::reply('get:'.$sdom.':'.$sname.
+		    ':environment:lastname&generation&firstname&middle'.
+		    'name',&Apache::lonnet::homeserver($sname,$sdom));
+	print "reply=$reply<br>";
+	my (@nameparts) = split /&/,$reply;
+#        my $sfullname = $Apache::lonnet::unescape($nameparts[0]);
+	if ( $Apache::grades::viewgrades eq 'F' ) {
+	    $request->print('<form action="/adm/grades" method="post">'."\n");
+	    $request->print("$sname @nameparts\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");
+	    $request->print('<input type="hidden" name="student" '.
+			    'value="'.$sname.'"></input>'."\n");
+	    $request->print('<input type="hidden" name="domain" '.
+			    'value="'.$sdom.'"></input>'."\n");
+	    $request->print('<input type="submit" name="submit" '.
+			    'value="View"></input>'."<br />\n");
+	    $request->print('</form>');
+	}
+    }
+}
 
-#FIXME - needs to be much smarter
+# ========== Finds a user based on a name substring (returns a 2 element array)
+#FIXME - needs to handle multiple matches
 sub finduser {
-  my ($name) = @_;
-  return ($name,$ENV{'user.domain'});
+    my ($name) = @_;
+    my $domain = '';
+    if ( $Apache::grades::viewgrades eq 'F' ) {
+	#get classlist
+	my ($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');
+	foreach my $student ( sort(@{ $classlist{'allids'} }) ) {
+	    my ($posname,$posdomain) = split(/:/,$student);
+	    if ($posname =~ $name) { 
+		$name = $posname;
+		$domain = $posdomain;
+		last;
+	    }
+	}
+	return ($name,$domain);
+    } else {
+	return ($ENV{'user.name'},$ENV{'user.domain'});
+    }
+}
+
+# ===================================== Gets a class list (returns a hash list)
+sub getclasslist {
+    my ($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;
+	}
+	print "record=$record<br>";
+	push( @{ $classlist{'allids'} }, $name); 
+    }
+    return (%classlist);
+}
+
+# ============================== Get parts of a stored value (returns an array)
+sub getpartlist {
+    my ($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;
+}
+
+# =================================== Displays student grade (returns a string)
+sub viewstudentgrade {
+    my ($url,$symb,$courseid,$student,@parts) = @_;
+    my $result = '';
+    my $cellclr = '"#ffffdd"';
+    my ($stuname,$domain) = split(/:/,$student);
+    my %record = &Apache::lonnet::restore($symb,$courseid,$domain,$stuname);
+    $result .= "<tr><td bgcolor=$cellclr>$stuname</td><td bgcolor=".
+	       "\"$cellclr\" align=\"middle\">$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"};
+	    $result .= "<td bgcolor=$cellclr align=\"middle\">".
+		       "<input type=\"text\" name=".
+		       "\"GRADE.$student.$part.$type\" ".
+		       "value=\"$score\" size=\"4\" /></td>\n";
+	} elsif ($type eq 'tries') {
+	    my $score = $record{"resource.$part.$type"};
+	    $result .= "<td bgcolor=$cellclr align=\"middle\"><input ".
+		       "type=\"text\" name=\"GRADE.$student.$part.".
+ 		       "$type\" value=\"$score\" size=\"4\" /></td>\n";
+	} elsif ($type eq 'solved') {
+	    my $score = $record{"resource.$part.$type"};
+	    $result .= "<td bgcolor=\"$cellclr\" align=\"middle\">".
+		       "<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 $result;
+}
+
+# ========================================================== Sets student grade
+#FIXME need to look at the meatdata <stores> spec
+# on what type of data to accept and provide an
+#interface based on that, also do that to above function.
+sub setstudentgrade {
+    my ($url,$symb,$courseid,$student,@parts) = @_;
+    my $result ='';
+    my ($stuname,$domain) = split(/:/,$student);
+    my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$stuname);
+    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);
+	
+	$result .= 'Stored away '.scalar(keys(%newrecord)).
+  	           " elements.<br />\n";
+    }
+    return $result;
 }
 
+
+# ========================================================== Attempt submission
 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 $result;
+    my ($request) = @_;
+    my $url = $ENV{'form.url'};
+    $url =~ s-^http://($ENV{'SERVER_NAME'}|$ENV{'HTTP_HOST'})--;
+    if ($ENV{'form.student'} eq '') { 
+	&moreinfo($request,"Need student login id"); return ''; }
+#  if ($ENV{'form.student'} eq '') { &listStudents($request); return ''; }
+    my ($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 $answer = &Apache::loncommon::get_previous_attempt($symb,$uname,$udom,
+		 $ENV{'request.course.id'});
+    my $result = "<h2> Submission Record </h2>  $uname:$udom for $url <br />".
+	         $answer;
+    return $result;
 }
 
+# ================================================================= View grades
+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');
+    my $headerclr = '"#ccffff"';
+    my $cellclr = '"#ffffcc"';
+
+    #get list of parts for this problem
+    my (@parts) = &getpartlist($url);
+
+    $request->print("<h2><font color=\"#339966\">Manual Grading</font></h2>");
+    
+    #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="'.$url.'"/>'."\n".
+	      '<input type="hidden" name="command" value="editgrades" />'."\n".
+	      '<input type="submit" name="submit" value="Submit Changes" />'.
+	      "\n".'<table border=0><tr><td bgcolor="#999999">'."\n".
+	      '<table border=0>'."\n".
+	      '<tr><td bgcolor='.$headerclr.'>UserId</td><td bgcolor='.
+              $headerclr.'>Domain</td>'."\n";
+    foreach my $part (@parts) {
+	my $display = &Apache::lonnet::metadata($url,$part.'.display');
+	if  (!$display) { 
+	    $display = &Apache::lonnet::metadata($url,$part.'.name'); }
+	$result .= '<td bgcolor='.$headerclr.'>'.$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></td></tr></table><input type="submit" name="submit"'.
+	       'value="Submit Changes" /></form>';
+    return $result;
+}
+
+# ================================================================= Edit grades
+sub editgrades {
+    my ($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 $result;
+}
+
+# ================================================================= Send header
 sub send_header {
-  my ($request)= @_;
-  $request->print(&Apache::lontexconvert::header());
-  $request->print('<body bgcolor="#FFFFFF">');
+    my ($request) = @_;
+    $request->print(&Apache::lontexconvert::header());
+#  $request->print("
+#<script>
+#remotewindow=open('','homeworkremote');
+#remotewindow.close();
+#</script>"); 
+    $request->print('<body bgcolor="#FFFFFF">');
 }
 
+# ================================================================= Send footer
 sub send_footer {
-  my ($request)= @_;
+  my ($request) = @_;
   $request->print('</body>');
   $request->print(&Apache::lontexconvert::footer());
 }
 
+# ===================================================================== Handler
 sub handler {
-  my $request=$_[0];
-
-  if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;} else {$Apache::lonxml::debug=0;}
-  
-  if ($ENV{'browser.mathml'}) {
-    $request->content_type('text/xml');
-  } else {
-    $request->content_type('text/html');
-  }
-  $request->send_http_header;
-  return OK if $request->header_only;
-  my $url=$ENV{'form.url'};
-  my $command=$ENV{'form.command'};
-  
-  &send_header($request);
-  if ($url eq '') {
-    $request->print("Non-Contextual Access Unsupported:$command:$url:");
-  } else {
-    $Apache::grades::viewgrades=&Apache::lonnet::allowed('vgr',$url);
-    if ($command eq 'submission') {
-      $request->print(&submission($request));
+    my $request = $_[0];
+    if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;}
+    else {$Apache::lonxml::debug=0;}
+    if ($ENV{'browser.mathml'}) {
+	$request->content_type('text/xml');
+    } else {
+	$request->content_type('text/html');
+    }
+    $request->send_http_header;
+    return OK if $request->header_only;
+    my $url = $ENV{'form.url'};
+    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 {
-      $request->print("Unknown action:$command:");
+	$Apache::grades::viewgrades=&Apache::lonnet::allowed('vgr',
+				    $ENV{'request.course.id'});
+	if ($command eq 'submission') {
+	    $request->print(&listStudents($request))
+		if ($ENV{'form.student'} eq '');
+	    $request->print(&submission($request))
+		if ($ENV{'form.student'} ne '');
+	} elsif ($command eq 'viewgrades') {
+	    $request->print(&viewgrades($request));
+	} elsif ($command eq 'editgrades') {
+	    $request->print(&editgrades($request));
+	} else {
+	    $request->print("Unknown action:$command:");
+	}
     }
-  }
-  &send_footer($request);
-  return OK;
+    &send_footer($request);
+    return OK;
 }
 
 1;
 
-__END__;
+__END__