--- loncom/interface/Attic/lonchart.pm	2001/12/20 20:47:53	1.26
+++ loncom/interface/Attic/lonchart.pm	2002/02/19 18:58:10	1.30
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # (Publication Handler
 #
-# $Id: lonchart.pm,v 1.26 2001/12/20 20:47:53 minaeibi Exp $
+# $Id: lonchart.pm,v 1.30 2002/02/19 18:58:10 minaeibi Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -33,17 +33,17 @@
 # (Page Handler
 #
 # (TeX Content Handler
-#
+# YEAR=2000
 # 05/29/00,05/30 Gerd Kortemeyer)
 # 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23,
 # 10/02,10/10,10/14,10/16,10/18,10/19,10/31,11/6,11/14,11/16 Gerd Kortemeyer)
-#
+# YEAR=2001
 # 3/1/1,6/1,17/1,29/1,30/1,31/1 Gerd Kortemeyer)
 # 7/10/01 Behrouz Minaei
 # 9/8 Gerd Kortemeyer
-# 10/18/01, 10/19/01 Behrouz Minaei
-# 11/17/01, 11/22/01, 11/24/01, 11/28/01 Behrouz Minaei
-# 12/18/01 Behrouz Minaei
+# 10/1, 10/19, 11/17, 11/22, 11/24, 11/28 12/18 Behrouz Minaei
+# YEAR=2002
+# 2/1, 2/6, 2/19 Behrouz Minaei
 #
 ###
 
@@ -52,14 +52,18 @@ package Apache::lonchart;
 use strict;
 use Apache::Constants qw(:common :http);
 use Apache::lonnet();
+use Apache::loncommon();
 use HTML::TokeParser;
 use GDBM_File;
 
 # -------------------------------------------------------------- Module Globals
 my %hash;
+my %CachData;
 my @cols;
 my @rowlabels;
 my @students;
+my @PreCol;
+my $r;
 
 # ------------------------------------------------------------- Find out status
 
@@ -220,179 +224,238 @@ sub tracetable {
     }
 }
 
-# ================================================================ Main Handler
-
-sub handler {
 
-  undef %hash;
-  undef @students;
-  undef @cols;
-  undef @rowlabels;
-
-  my $r=shift;
+sub BuildChart {
+# ----------------------- Get first and last resource, see if there is anything
+    my $firstres=$hash{'map_start_/res/'.$ENV{'request.course.uri'}};
+    my $lastres=$hash{'map_finish_/res/'.$ENV{'request.course.uri'}};
+    if (($firstres) && ($lastres)) {
+# ----------------------------------------------------------------- Render page
+	my $cid=$ENV{'request.course.id'};
+        my $chome=$ENV{'course.'.$cid.'.home'};
+        my ($cdom,$cnum)=split(/\_/,$cid);
+# ---------------------------------------------- Read class list and row labels
+	my $classlst=&Apache::lonnet::reply
+                            ('dump:'.$cdom.':'.$cnum.':classlist',$chome);
+	my $now=time;
+	unless ($classlst=~/^error\:/) {
+	    map {
+		my ($name,$value)=split(/\=/,$_);
+		my ($end,$start)=split(/\:/,&Apache::lonnet::unescape($value));
+		my $active=1;
+		if (($end) && ($now>$end)) { $active=0; }
+		if ($active) {
+		    my $thisindex=$#students+1;
+		    $name=&Apache::lonnet::unescape($name);
+		    $students[$thisindex]=$name;
+		    my ($sname,$sdom)=split(/\:/,$name);
+		    $PreCol[$thisindex]=$sname.':';
+		    my $ssec=&Apache::lonnet::usection($sdom,$sname,$cid);
+		    if ($ssec==-1) {
+			$rowlabels[$thisindex]=
+			    'Data not available: '.$name;
+		    } else {
+			my %reply=&Apache::lonnet::idrget($sdom,$sname);
+			my $reply=&Apache::lonnet::reply('get:'.$sdom.':'.$sname.
+                                     ':environment:lastname&generation&firstname&middlename',
+                                                 &Apache::lonnet::homeserver($sname,$sdom));
+			#$ssec=(int($ssec)) ? int($ssec) : $ssec;
+			$rowlabels[$thisindex]=
+			    sprintf('%3s',$ssec).' '.$reply{$sname}.' ';
+			$PreCol[$thisindex] .= $reply.':'.$ssec;
+			my $i=0;
+			map {
+			    $i++;
+			    if ( $_ ne '') {
+				$rowlabels[$thisindex].=&Apache::lonnet::unescape($_).' ';
+			    }
+			    if ($i == 2) {
+				chop($rowlabels[$thisindex]);
+				$rowlabels[$thisindex].=', ';
+			    }
+			} split(/\&/,$reply);
+		    }
+		}
+	    } sort split(/\&/,$classlst);
 
-  if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
-# ------------------------------------------- Set document type for header only
+	} else {
+	    $r->print('<h1>Could not access course data</h1>');
+	}
+
+	my $allstudents=$#students+1;
+	$r->print('<h3>'.$allstudents.' students</h3>');
+	&CreateForm();
+	$r->rflush();
 
-  if ($r->header_only) {
-       if ($ENV{'browser.mathml'}) {
-           $r->content_type('text/xml');
-       } else {
-           $r->content_type('text/html');
-       }
-       $r->send_http_header;
-       return OK;
-   }
+# --------------- Find all assessments and put them into some linear-like order
+	&tracetable($firstres,'&'.$lastres.'&');
+# ----------------------------------------------------------------- Start table
 
-  my $requrl=$r->uri;
-# ----------------------------------------------------------------- Tie db file
-  if ($ENV{'request.course.fn'}) {
-      my $fn=$ENV{'request.course.fn'};
-      if (-e "$fn.db") {
-          if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) {
-# ------------------------------------------------------------------- Hash tied
+        $r->print('<p><pre>');
+ 	my $index;
+        for ($index=0;$index<=$#students;$index++) {
+	    my $Str=&ExtractStudentData($index,$cid);
+	    $r->print($Str.'<br>');
+            $r->rflush();
+	    $CachData{$PreCol[$index]}=$Str;
+        }
+        $r->print('</pre>');
+    } else {
+	$r->print('<h3>Undefined course sequence</h3>');
+    }
+}
 
+sub CreateForm {
+    my $Ptr = '<form name=stat method=post action="/adm/chart" >'."\n";
+    $Ptr .= '<b> Sort by: &nbsp; </b>'."\n";
+    $Ptr .= '&nbsp;&nbsp;&nbsp;';
+    $Ptr .= '<input type=submit name=sort value="Email Name" />'."\n";
+    $Ptr .= '&nbsp;&nbsp;&nbsp;';
+    $Ptr .= '<input type=submit name=sort value="Last Name" />'."\n";
+    $Ptr .= '&nbsp;&nbsp;&nbsp;';
+    $Ptr .= '<input type=submit name=sort value="Section"/>'."\n";
+    $Ptr .= '<br>';
+    $Ptr .= '<input type=submit name=sort value="Recalculate Chart"/>'."\n";
+    $Ptr .= '</form>'."\n";
+    $r->print( $Ptr );
+}
 
-# ------------------------------------------------------------------ Build page
+sub CacheChart {
+    my @list = ();
+    my $count=0;
+
+    my $Pos = $ENV{'form.sort'};
+    if ( $Pos eq 'Last Name' ) {$Pos=1;}
+    elsif ( $Pos eq 'Section' ) {$Pos=2;}
+    else {$Pos=0;}
+
+    foreach my $key( keys %CachData) { 
+	my @Temp=split(/\:/,$key);
+	my $Use = $Temp[$Pos];
+	$list[$count]=$Use.$key.'*'.$CachData{$key};
+	$count++;
+    }
 
-# ---------------------------------------------------------------- Send headers
+    @list = sort (@list);
 
-             $r->content_type('text/html');
-             $r->send_http_header;
-             $r->print(
-  '<html><head><title>LON-CAPA Assessment Chart</title></head>');
-
-	     $r->print('<body bgcolor="#FFFFFF">'.
-                                    '<script>window.focus();</script>'.
-                           '<img align=right src=/adm/lonIcons/lonlogos.gif>'.
-                                    '<h1>Assessment Chart</h1>');
+    $r->print('<h3>'.$count.' students</h3>');
+    &CreateForm();
+    $r->rflush();
+    
+    $r->print('<p><pre>');
+    for ( my $n; $n < $count; $n++) {
+	my ($dummy, $Line) = split(/\*/,$list[$n]);
+	$r->print($Line.'<br>');
+    }	
+    $r->print('</pre>');
+}
 
+sub Start {
+    undef %hash;
+    undef %CachData;
+    undef @students;
+    undef @cols;
+    undef @rowlabels;
+    undef @PreCol;
+
+    $r->print('<html><head><title>'.
+              'LON-CAPA Assessment Chart</title></head>');
+    $r->print('<body bgcolor="#FFFFFF">'.
+              '<script>window.focus();</script>'.
+              '<img align=right src=/adm/lonIcons/lonlogos.gif>'.
+              '<h1>Assessment Chart</h1>');
 # ---------------------------------------------------------------- Course title
-
-    $r->print('<h1>'.
-    $ENV{'course.'.$ENV{'request.course.id'}.'.description'}.'</h1><h3>'.
-    localtime()."</h3><p><pre>1..9: correct by student in 1..9 tries\n".
-                            "   *: correct by student in more than 9 tries\n".
-	                    "   +: correct by override\n".
-                            "   -: incorrect by override\n".
-	                    "   .: incorrect attempted\n".
-	                    "   #: ungraded attempted\n".
-                            "    : not attempted\n".
-	                    "   x: excused</pre><p>");
-  
+    $r->print('<h1>'.$ENV{'course.'.$ENV{'request.course.id'}.
+              '.description'}.'</h1><h3>'.localtime().
+              "</h3><p><pre>1..9: correct by student in 1..9 tries\n".
+              "   *: correct by student in more than 9 tries\n".
+	      "   +: correct by override\n".
+              "   -: incorrect by override\n".
+	      "   .: incorrect attempted\n".
+	      "   #: ungraded attempted\n".
+              "    : not attempted\n".
+	      "   x: excused</pre><p>"); 
 # ------------------------------- This is going to take a while, produce output
-
-             $r->rflush();
-
-# ----------------------- Get first and last resource, see if there is anything
-
-
-              my $firstres=$hash{'map_start_/res/'.$ENV{'request.course.uri'}};
-              my $lastres=$hash{'map_finish_/res/'.$ENV{'request.course.uri'}};
-              if (($firstres) && ($lastres)) {
-# ----------------------------------------------------------------- Render page
-
-                 my $cid=$ENV{'request.course.id'};
-                 my $chome=$ENV{'course.'.$cid.'.home'};
-                 my ($cdom,$cnum)=split(/\_/,$cid);
-
-# ---------------------------------------------- Read class list and row labels
-
-    my $classlst=&Apache::lonnet::reply
-                                 ('dump:'.$cdom.':'.$cnum.':classlist',$chome);
-    my $now=time;
-    unless ($classlst=~/^error\:/) {
-        map {
-            my ($name,$value)=split(/\=/,$_);
-            my ($end,$start)=split(/\:/,&Apache::lonnet::unescape($value));
-            my $active=1;
-            if (($end) && ($now>$end)) { $active=0; }
-            if ($active) {
-                my $thisindex=$#students+1;
-                $name=&Apache::lonnet::unescape($name);
-                $students[$thisindex]=$name;
-                my ($sname,$sdom)=split(/\:/,$name);
-                my $ssec=&Apache::lonnet::usection($sdom,$sname,$cid);
-                if ($ssec==-1) {
-                    $rowlabels[$thisindex]=
-                      'Data not available: '.$name;
-                } else {
-                    my %reply=&Apache::lonnet::idrget($sdom,$sname);
-		    my $reply=&Apache::lonnet::reply('get:'.$sdom.':'.$sname.
-                                                     ':environment:lastname&generation&firstname&middlename',
-                                                     &Apache::lonnet::homeserver($sname,$sdom));
-                    $rowlabels[$thisindex]=
-                      sprintf('%3s',$ssec).' '.$reply{$sname}.' ';
-                    my $i=0;
-                    map {
-                      $i++;
-                      if ( $_ ne '') {
-                        $rowlabels[$thisindex].=&Apache::lonnet::unescape($_).' ';
-                      }
-                      if ($i == 2) {
-                        chop($rowlabels[$thisindex]);
-                        $rowlabels[$thisindex].=', ';
-                      }
-                    } split(/\&/,$reply);
-
-                }
-            }
-        } sort split(/\&/,$classlst);
-
-    } else {
-        $r->print('<h1>Could not access course data</h1>');
-    }
-
-    my $allstudents=$#students+1;
-    $r->print('<h3>'.$allstudents.' students</h3>');
     $r->rflush();
 
-# --------------- Find all assessments and put them into some linear-like order
-
-   &tracetable($firstres,'&'.$lastres.'&');
-
-# ----------------------------------------------------------------- Start table
+    my $cid=$ENV{'request.course.id'};
+    my $ChartDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
+                  "_$ENV{'user.domain'}_$cid\_chart.db";
+
+    if ((-e "$ChartDB") && ($ENV{'form.sort'} ne 'Recalculate Chart')) {
+	if (tie(%CachData,'GDBM_File',"$ChartDB",&GDBM_READER,0640)) {
+	    &CacheChart();
+	}
+	else {
+	    $r->print("Unable to tie hash to db file");
+	}
+    }
+    else {
+	if (tie(%CachData,'GDBM_File',$ChartDB,&GDBM_WRCREAT,0640)) {
+	    foreach (keys %CachData) {delete $CachData{$_};}
+	    &BuildChart();
+	}
+	else {
+	    $r->print("Unable to tie hash to db file");
+	}
+    }
+    untie(%CachData);
+}
 
-                          $r->print('<p><pre>');
- 			  my $index;
-                           for ($index=0;$index<=$#students;$index++) {
-                              $r->print(&ExtractStudentData($index,$cid).'<br>');
-                              $r->rflush();
-                          }
-                          $r->print('</pre>');
+# ================================================================ Main Handler
 
-	     } else {
-                 $r->print('<h3>Undefined course sequence</h3>');
-             }
+sub handler {
+    $r=shift;
+    if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
+# ------------------------------------------- Set document type for header only
+	if ($r->header_only) {
+	    if ($ENV{'browser.mathml'}) {
+		$r->content_type('text/xml');
+	    } else {
+		$r->content_type('text/html');
+	    }
+	    &Apache::loncommon::no_cache($r);
+	    $r->send_http_header;
+	    return OK;
+	}
 
-                      $r->print('</body></html>');
-                                     
+	my $requrl=$r->uri;
+# ----------------------------------------------------------------- Tie db file
+	if ($ENV{'request.course.fn'}) {
+	    my $fn=$ENV{'request.course.fn'};
+	    if (-e "$fn.db") {
+		if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) {
+# ------------------------------------------------------------------- Hash tied
+# ---------------------------------------------------------------- Send headers
+		    $r->content_type('text/html');
+		    $r->send_http_header;
+		    &Start();
+		    $r->print('</body></html>');                 
 # ------------------------------------------------------------- End render page
-              } else {
-                  $r->content_type('text/html');
-                  $r->send_http_header;
-		  $r->print('<html><body>Coursemap undefined.</body></html>');
-              }
+		} else {
+		    $r->content_type('text/html');
+		    $r->send_http_header;
+		    $r->print('<html><body>Coursemap undefined.</body></html>');
+		}
 # ------------------------------------------------------------------ Untie hash
-              unless (untie(%hash)) {
-                   &Apache::lonnet::logthis("<font color=blue>WARNING: ".
-                       "Could not untie coursemap $fn (browse).</font>"); 
-              }
+		unless (untie(%hash)) {
+		    &Apache::lonnet::logthis("<font color=blue>WARNING: ".
+			     "Could not untie coursemap $fn (browse).</font>"); 
+		}
 
 # -------------------------------------------------------------------- All done
-	      return OK;
+		return OK;
 # ----------------------------------------------- Errors, hash could no be tied
-      }
-  } else {
-  $ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
-  return HTTP_NOT_ACCEPTABLE; 
-}
-} else {
-      $ENV{'user.error.msg'}=
+	    }
+	} else {
+	    $ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
+	    return HTTP_NOT_ACCEPTABLE; 
+	}
+    } else {
+	$ENV{'user.error.msg'}=
         $r->uri.":vgr:0:0:Cannot view grades for complete course";
-      return HTTP_NOT_ACCEPTABLE; 
-
-}
+	return HTTP_NOT_ACCEPTABLE; 
+    }
 }
 1;
 __END__