--- loncom/interface/lontrackstudent.pm	2006/12/06 22:22:37	1.21
+++ loncom/interface/lontrackstudent.pm	2009/01/02 23:07:55	1.26
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lontrackstudent.pm,v 1.21 2006/12/06 22:22:37 albertel Exp $
+# $Id: lontrackstudent.pm,v 1.26 2009/01/02 23:07:55 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -48,6 +48,7 @@ use Apache::lonmysql;
 use Apache::lonnet;
 use Apache::lonlocal;
 use Time::HiRes;
+use DateTime();
 use lib '/home/httpd/lib/perl/';
 use LONCAPA;
 
@@ -110,12 +111,21 @@ sub get_data {
     &Apache::lonhtmlcommon::Update_PrgWin
         ($r,$prog_state,&mt('Parsing results'));
     #
-    &output_results($r,$results_file,$navmap,$mode);
+    my $last = &output_results($r,$results_file,$navmap,$mode);
     my ($sname,$sdom) = ($mode=~/^student:(.*):(.*)$/);
-    $r->print(&Apache::loncommon::track_student_link(
-				  'View more activity by this student',
-				  $sname,$sdom,undef,
-				  ($env{'form.start'}+$num_records)));
+    
+    my ($text,$inc);
+    if ( $last > 0 && (($last+1) >= $env{'form.start'}+$num_records) ) {
+	$text = 'View more activity by this student';
+	$inc  = $num_records;
+	$r->print(&Apache::loncommon::track_student_link($text,$sname,$sdom,undef,
+							 ($env{'form.start'}+$inc)
+							 ));
+	$r->print('<br />');
+    }
+    $text = 'Resubmit last request to check for newer data';
+    $r->print(&Apache::loncommon::track_student_link($text,$sname,$sdom,undef,
+						     $env{'form.start'}));
 
     &Apache::lonhtmlcommon::Update_PrgWin($r,$prog_state,&mt('Finished!'));
     return;
@@ -239,7 +249,7 @@ sub output_results {
     if (! -s $results_file) {
         # results file is empty, just let them know there is no data
         $r->print('<h2>'.&mt('So far, no data has been returned for your request').'</h2>');
-        return;
+        return -1;
     }
     if (! open(ACTIVITYDATA,$results_file)) {
         $r->print('<h2>'.&mt('Unable to read results file.').'</h2>'.
@@ -248,7 +258,7 @@ sub output_results {
                       'You should contact your system administrator '.
                       'to resolve this issue.').
                   '</p>');
-        return;
+        return -2;
     }
     ##
     ##
@@ -256,6 +266,7 @@ sub output_results {
     if ($mode eq 'full_class') { 
         $tableheader = 
             '<table><tr>'.
+            '<th>&nbsp;</th>'.
             '<th>'.&mt('Resource').'</th>'.
             '<th>'.&mt('Time').'</th>'.
             '<th>'.&mt('Student').'</th>'.
@@ -266,6 +277,7 @@ sub output_results {
     } elsif ($mode =~ /^student:(.*):(.*)$/) {
         $tableheader = 
             '<table><tr>'.
+            '<th>&nbsp;</th>'.
             '<th>'.&mt('Resource').'</th>'.
             '<th>'.&mt('Time').'</th>'.
             '<th>'.&mt('Action').'</th>'.
@@ -277,6 +289,17 @@ sub output_results {
     $r->rflush();
     ##
     ##
+
+    my $cid = $env{'request.course.id'};
+    my $cnum = $env{'course.'.$cid.'.num'};
+    my $cdom = $env{'course.'.$cid.'.domain'};   
+    my $server_timezone = &Apache::lonnet::get_server_timezone($cnum,$cdom);
+    if ($server_timezone ne '') {
+        if (&Apache::lonlocal::gettimezone($server_timezone) eq 'local') {
+            $server_timezone = '';
+        }
+    }
+
     while (my $line = <ACTIVITYDATA>) {
         # FIXME: does not pass symbs along :(
         chomp($line);
@@ -307,10 +330,11 @@ sub output_results {
                 $title = $nav_res->compTitle();
                 $src   = $nav_res->src();
             } else {
-                if ($src =~ m|^/res|) {
-                    $title = $src;
-                } elsif ($values =~ /^\s*$/ && 
-                         (! defined($src) || $src =~ /^\s*$/)) {
+		$src = $symb;
+		if ($src !~ m{/adm}) {
+		    $title = &Apache::lonnet::gettitle($src);
+		} elsif ($values =~ /^\s*$/ && 
+		    (! defined($src) || $src =~ /^\s*$/)) {
                     next;
                 } elsif ($values =~ /^\s*$/) {
                     $values = $src;
@@ -350,14 +374,17 @@ sub output_results {
         my $tablerow = qq{<tr class="$class"><td>}.($count+1).qq{</td>};
         if ($src =~ m|^/adm/|) {
             $tablerow .= 
-                '<td valign="top"><nobr>'.$title.'</nobr></td>';
+                '<td valign="top"><span class="LC_nobreak">'.$title.'</span></td>';
         } else {
             $tablerow .= 
-                '<td valign="top"><nobr>'.
+                '<td valign="top"><span class="LC_nobreak">'.
                 '<a href="'.$src.'">'.$title.'</a>'.
-                '</nobr></td>';
+                '</span></td>';
+        }
+        if ($server_timezone ne '') {
+            $timestamp = &convert_timezone($server_timezone,$timestamp);
         }
-        $tablerow .= '<td valign="top"><nobr>'.$timestamp.'</nobr></td>';
+        $tablerow .= '<td valign="top"><span class="LC_nobreak">'.$timestamp.'</span></td>';
         if ($mode eq 'full_class') {
             $tablerow.='<td valign="top">'.$student.'</td>';
         }
@@ -370,7 +397,31 @@ sub output_results {
     }
     $r->print('</table>'.$/);### if (! $count % 50);
     close(ACTIVITYDATA);
-    return;
+    return $count;
+}
+
+sub convert_timezone {
+    my ($server_timezone,$timestamp) = @_;
+    if ($server_timezone && $timestamp) {
+        my ($date,$time) = split(/\s+/,$timestamp);
+        my ($year,$month,$day) = split(/\-/,$date);
+        my ($hour,$minute,$sec) = split(/:/,$time);
+        foreach ($month,$day,$hour,$minute,$sec) {
+            return $timestamp if $_ eq '';
+            $_ =~ s/^0//;
+        }
+        my $dt = DateTime->new(year      => $year,
+                               month     => $month,
+                               day       => $day,
+                               hour      => $hour,
+                               minute    => $minute,
+                               second    => $sec,
+                               time_zone => $server_timezone,
+                              );
+        my $unixtime = $dt->epoch;
+        $timestamp = &Apache::lonlocal::locallocaltime($unixtime);
+    }
+    return $timestamp;
 }
 
 ###################################################################
@@ -388,8 +439,11 @@ sub display_values {
 	}
 	$result.='</table>';
     } elsif ($action eq 'POST') {
-	my %values=
-	    map {split('=',&unescape($_),-1)} split(/\&/,$values);
+	my %values;
+        foreach my $pair (split(/\&/,$values)) {
+            my ($key,$value) = split('=',&unescape($pair),-1);
+            $values{$key} = $value;
+        }
 	foreach my $key (sort(keys(%values))) {
 	    if ($key eq 'counter') { next; }
 	    $result.='<tr><td align="right">'.$key.'</td>'.
@@ -503,6 +557,11 @@ sub handler {
     #
     # We will almost always need this...
     my $navmap = Apache::lonnavmaps::navmap->new();
+    if (!defined($navmap)) {
+        my $requrl = $r->uri;
+        $env{'user.error.msg'} = "$requrl:bre:0:0:Navmap initialization failed.";
+        return HTTP_NOT_ACCEPTABLE;
+    }
     # 
     &Apache::lonhtmlcommon::clear_breadcrumbs();
     &Apache::lonhtmlcommon::add_breadcrumb({href=>'/adm/studentactivity',