--- loncom/interface/lontrackstudent.pm	2004/08/11 18:41:05	1.1
+++ loncom/interface/lontrackstudent.pm	2004/08/29 19:58:32	1.6
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lontrackstudent.pm,v 1.1 2004/08/11 18:41:05 matthew Exp $
+# $Id: lontrackstudent.pm,v 1.6 2004/08/29 19:58:32 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -48,20 +48,247 @@ use Apache::lonnet();
 use Apache::lonlocal;
 use Time::HiRes;
 
+sub get_data {
+    my ($r,$prog_state,$navmap,$mode) = @_;
+    ##
+    ## Compose the query
+    &Apache::lonhtmlcommon::Update_PrgWin
+        ($r,$prog_state,&mt('Composing Query'));
+    #
+    my $query = &build_query($mode);
+    &Apache::lonnet::logthis('sending query '.$query);
+    ##
+    ## Send it along
+    my $home = $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
+    my $reply=&Apache::lonnet::metadata_query($query,undef,undef,[$home]);
+    if (ref($reply) ne 'HASH') {
+        $r->print('<h2>'.
+                  &mt('Error contacting home server for course: [_1]',
+                      $reply).
+                  '</h2>');
+        return;
+    }
+    my $results_file = $r->dir_config('lonDaemons').'/tmp/'.$reply->{$home};
+    my $endfile = $results_file.'.end';
+    ##
+    ## Check for the results
+    &Apache::lonhtmlcommon::Update_PrgWin
+        ($r,$prog_state,&mt('Waiting for results'));
+    my $maxtime = 500;
+    my $starttime = time;
+    while (! -e $endfile && (time-$starttime < $maxtime)) {
+        &Apache::lonhtmlcommon::Update_PrgWin
+            ($r,$prog_state,&mt('Waiting up to [_1] seconds for results',
+                                $starttime+$maxtime-time));
+        sleep(1);
+    }
+    if (! -e $endfile) {
+        $r->print('<h2>'.
+                  &mt('Unable to retrieve data.').'</h2>');
+        $r->print(&mt('Please try again in a few minutes.'));
+        return;
+    }
+#    $r->print('<h2>'.&mt('Elapsed Time = [_1] seconds',
+#                         time-$starttime).'</h2>');
+    $r->rflush();
+    &Apache::lonhtmlcommon::Update_PrgWin
+        ($r,$prog_state,&mt('Parsing results'));
+#    $r->print('<h2>'.
+#              &mt('Reloading this page may result in newer data').
+#              '</h2>');
+    &output_results($r,$results_file,$navmap,$mode);
+    &Apache::lonhtmlcommon::Update_PrgWin($r,$prog_state,&mt('Finished!'));
+    return;
+}
+
+sub build_query {
+    my ($mode) = @_;
+    my $cid = $ENV{'request.course.id'};
+    my $domain = $ENV{'course.'.$cid.'.domain'};
+    my $home = $ENV{'course.'.$cid.'.home'};
+    my $course = $ENV{'course.'.$cid.'.num'};
+    my $prefix = $course.'_'.$domain.'_';
+    #
+    my $student_table  = $prefix.'students';
+    my $res_table      = $prefix.'resource';
+    my $action_table   = $prefix.'actions';
+    my $machine_table  = $prefix.'machine_table';
+    my $activity_table = $prefix.'activity';
+    #
+    my $query;
+    if ($mode eq 'full_class') {
+        $query = qq{
+        SELECT B.resource,A.time,C.student,A.action,E.machine,A.action_values 
+            FROM $activity_table AS A
+            LEFT JOIN $res_table      AS B ON B.res_id=A.res_id 
+            LEFT JOIN $student_table  AS C ON C.student_id=A.student_id 
+            LEFT JOIN $machine_table  AS E ON E.machine_id=A.machine_id
+            WHERE A.student_id>10
+            ORDER BY A.time DESC
+            LIMIT 500
+        };
+    } elsif ($mode =~ /^student:(.*):(.*)$/) {
+        my $student = $1.':'.$2;
+        $query = qq{
+            SELECT B.resource,A.time,A.action,E.machine,A.action_values 
+                FROM $activity_table AS A
+                LEFT JOIN $res_table      AS B ON B.res_id=A.res_id 
+                LEFT JOIN $student_table  AS C ON C.student_id=A.student_id 
+                LEFT JOIN $machine_table  AS E ON E.machine_id=A.machine_id
+                WHERE C.student='$student'
+                ORDER BY A.time DESC
+                LIMIT 500
+            };
+    }
+    $query =~ s|$/||g;
+    return $query;
+}
+
 ###################################################################
 ###################################################################
-sub get_all_data {}
-sub get_student_data {}
-sub html_output_student_data {}
-sub html_output_class_data {}
+sub output_results {
+    my ($r,$results_file,$navmap,$mode) = @_;
+    ##
+    ##
+    if (! open(ACTIVITYDATA,$results_file)) {
+        $r->print('<h2>'.&mt('Unable to read results file.').'</h2>'.
+                  '<p>'.
+                  &mt('This is a serious error and has been logged.  '.
+                      'You should contact your system administrator '.
+                      'to resolve this issue.').
+                  '</p>');
+        return;
+    }
+    ##
+    ##
+    my $tableheader;
+    if ($mode eq 'full_class') { 
+        $tableheader = 
+            '<table><tr>'.
+            '<th>'.&mt('Resource').'</th>'.
+            '<th>'.&mt('Time').'</th>'.
+            '<th>'.&mt('Student').'</th>'.
+            '<th>'.&mt('Action').'</th>'.
+ #           '<th>'.&mt('Originating Server').'</th>'.
+            '<th align="left">'.&mt('Data').'</th>'.
+            '</tr>'.$/;
+    } elsif ($mode =~ /^student:(.*):(.*)$/) {
+        $tableheader = 
+            '<table><tr>'.
+            '<th>'.&mt('Resource').'</th>'.
+            '<th>'.&mt('Time').'</th>'.
+            '<th>'.&mt('Action').'</th>'.
+ #           '<th>'.&mt('Originating Server').'</th>'.
+            '<th align="left">'.&mt('Data').'</th>'.
+            '</tr>'.$/;
+    }
+    my $count = -1;
+    $r->rflush();
+    ##
+    ##
+    while (my $line = <ACTIVITYDATA>) {
+        chomp($line);
+        $line = &Apache::lonnet::unescape($line);
+        if (++$count % 50 == 0) {
+            if ($count != 0) { 
+                $r->print('</table>'.$/);
+                $r->rflush();
+            }
+            $r->print($tableheader);
+        }
+        my ($symb,$timestamp,$student,$action,$machine,$values);
+        if ($mode eq 'full_class') {
+            ($symb,$timestamp,$student,$action,$machine,$values) =
+                map { &Apache::lonnet::unescape($_); } split(',',$line,6);
+        } else {
+            ($symb,$timestamp,$action,$machine,$values) =
+                map { &Apache::lonnet::unescape($_); } split(',',$line,5);
+        }
+        my ($title,$src);
+        if ($symb =~ m:^/adm/:) {
+            $title = $symb;
+            $src = $symb;
+        } else {
+            my $nav_res = $navmap->getBySymb($symb);
+            if (defined($nav_res)) {
+                $title = $nav_res->title();
+                $src   = $nav_res->src();
+            } else {
+                if ($src =~ m|^/res|) {
+                    $title = $src;
+                } elsif ($values =~ /^\s*$/ && 
+                         (! defined($src) || $src =~ /^\s*$/)) {
+                    next;
+                } elsif ($values =~ /^\s*$/) {
+                    $values = $src;
+                } else {
+                    $title = 'unable to retrieve title';
+                    $src   = '/dev/null';
+                }
+            }
+        }
+        my %classes;
+        my $class_count=0;
+        if (! exists($classes{$symb})) {
+            $classes{$symb} = $class_count++;
+        }
+        my $class = 'a';#.$classes{$symb};
+        #
+        if ($symb eq '/prtspool/') {
+            $class = 'print';
+            $title = 'retrieve printout';
+        } elsif ($symb =~ m|^/adm/([^/]+)|) {
+            $class = $1;
+        } elsif ($symb =~ m|^/adm/|) {
+            $class = 'adm';
+        }
+        if ($title eq 'unable to retrieve title') {
+            $title =~ s/ /\&nbsp;/g;
+            $class = 'warning';
+        }
+        if (! defined($title) || $title eq '') {
+            $title = 'untitled';
+            $class = 'warning';
+        }
+        # Clean up the values
+        $values =~ s/counter=\d+$//;
+        #
+        # Build the row for output
+        my $tablerow = qq{<tr class="$class">};
+        if ($src =~ m|^/adm/|) {
+            $tablerow .= 
+                '<td><nobr>'.$title.'</td>';
+        } else {
+            $tablerow .= 
+                '<td><nobr>'.
+                '<a href="'.$src.'">'.$title.'</a>'.
+                '</nobr></td>';
+        }
+        $tablerow .= '<td><nobr>'.$timestamp.'</nobr></td>';
+        if ($mode eq 'full_class') {
+            $tablerow.='<td>'.$student.'</td>';
+        }
+        $tablerow .= 
+            '<td>'.$action.'</td>'.
+#            '<td>'.$machine.'</td>'.
+            '<td>'.$values.'</td>'.
+            '</tr>';
+        $r->print($tablerow.$/);
+    }
+    $r->print('</table>'.$/) if (! $count % 50);
+    close(ACTIVITYDATA);
+    return;
+}
 
+###################################################################
+###################################################################
 sub request_data_update {
     my $command = 'prepare activity log';
     my $cid = $ENV{'request.course.id'};
     my $domain = $ENV{'course.'.$cid.'.domain'};
     my $home = $ENV{'course.'.$cid.'.home'};
     my $course = $ENV{'course.'.$cid.'.num'};
-    &Apache::lonnet::logthis($command.' '.$course.' '.$domain.' '.$home);
+#    &Apache::lonnet::logthis($command.' '.$course.' '.$domain.' '.$home);
     my $result = &Apache::lonnet::metadata_query($command,$course,$domain,
                                                  [$home]);
     return $result;
@@ -69,7 +296,49 @@ sub request_data_update {
 
 ###################################################################
 ###################################################################
+sub pick_student {
+    my ($r) = @_;
+    $r->print("Sorry, cannot display classlist at this time.  Come back another time.");
+    return;
+}
 
+###################################################################
+###################################################################
+sub styles {
+    return <<END;
+<style type="text/css">
+    tr.warning   { background-color: \#CCCCCC; }
+    tr.chat      { background-color: \#CCCCCC; }
+    tr.chatfetch { background-color: \#CCCCCC; }
+    tr.navmaps   { background-color: \#CCCCCC; }
+    tr.roles     { background-color: \#CCCCCC; }
+    tr.flip      { background-color: \#CCCCCC; }
+    tr.adm       { background-color: \#CCCCCC; }
+    tr.print     { background-color: \#CCCCCC; }
+    tr.printout  { background-color: \#CCCCCC; }
+    tr.parmset   { background-color: \#CCCCCC; }
+    tr.grades    { background-color: \#CCCCCC; }
+</style>
+END
+} 
+
+sub developer_centric_styles {
+    return <<END;
+<style type="text/css">
+    tr.warning   { background-color: red; }
+    tr.chat      { background-color: yellow; }
+    tr.chatfetch { background-color: yellow; }
+    tr.navmaps   { background-color: \#777777; }
+    tr.roles     { background-color: \#999999; }
+    tr.flip      { background-color: \#BBBBBB; }
+    tr.adm       { background-color: green; }
+    tr.print     { background-color: blue; }
+    tr.parmset   { background-color: \#000088; }
+    tr.printout  { background-color: blue; }
+    tr.grades    { background-color: \#CCCCCC; }
+</style>
+END
+}
 
 ###################################################################
 ###################################################################
@@ -110,14 +379,9 @@ sub handler {
     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                                             ['selected_student']);
     #
-    # Give the LON-CAPA page header
-    $r->print('<html><head><title>'.
-              &mt('Student Activity').
-              "</title></head>\n".
-              &Apache::loncommon::bodytag('Student Activity'));
-    $r->rflush();
+    # We will almost always need this...
+    my $navmap = Apache::lonnavmaps::navmap->new();
     # 
-    # Either print out a menu for them or send them to a report
     &Apache::lonhtmlcommon::clear_breadcrumbs();
     &Apache::lonhtmlcommon::add_breadcrumb({href=>'/adm/studentactivity',
                                             title=>'Student Activity',
@@ -125,26 +389,56 @@ sub handler {
                                             faq=>139,
                                             bug=>'instructor interface'});
     #
+    # Give the LON-CAPA page header
+    $r->print('<html><head>'.&styles.'<title>'.
+              &mt('Student Activity').
+              "</title></head>\n".
+              &Apache::loncommon::bodytag('Student Activity').
+              &Apache::lonhtmlcommon::breadcrumbs(undef,'Student Activity'));
+    $r->rflush();
+    #
     # Begin form output
-    $r->print('<form name="Statistics" ');
-    $r->print('method="post" action="/adm/statistics">');
+    $r->print('<form name="trackstudent" method="post" action="/adm/trackstudent">');
+    $r->print('<br />');
+    $r->print('<div name="statusline">'.
+              &mt('Status:[_1]',
+                  '<input type="text" name="status" size="60" value="" />').
+              '</div>');
     $r->rflush();
-    $r->print('<h1>'.&mt('View student activity').'</h1>');
+    my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
+        ($r,&mt('Student Activity Retrieval'),
+         &mt('Student Activity Retrieval'),undef,'inline',undef,
+         'trackstudent','status');
+    &Apache::lonhtmlcommon::Update_PrgWin
+        ($r,\%prog_state,&mt('Contacting course home server'));
     #
     my $result = &request_data_update();
     if (ref($result) eq 'HASH') {
-        $result = join(map { $_.'=>'.$result->{$_}; } keys(%$result));
+        $result = join(' ',map { $_.'=>'.$result->{$_}; } keys(%$result));
     }
-    $r->print('<h2>'.$result.'</h2>');
     #
-    if (! exists($ENV{'form.selected_student'})) {
-        # Choose a student
-        $r->print('If you worked here you would be done by now');
+    if (exists($ENV{'form.selected_student'})) {
+        # For now, just show all the data, in the future allow selection of
+        # a student
+        my ($sname,$sdom) = split(':',$ENV{'form.selected_student'});
+        if ($sname =~ /^\w*$/ && $sdom =~ /^\w*$/) {
+            $r->print('<h2>'.
+                      &mt('Recent activity of [_1]@[_2]',$sname,$sdom).
+                      '</h2>');
+            &get_data($r,\%prog_state,$navmap,
+                      'student:'.$ENV{'form.selected_student'});
+        } else {
+            $r->print('<h2>'.&mt('Unable to process for [_1]@[_2]',
+                                 $sname,$sdom).'</h2>');
+        }
     } else {
-        # Show a students activity
-        $r->print('I would like to have something to show you but I do not.');
+        # For now, just show all the data instead of limiting it to one student
+        &get_data($r,\%prog_state,$navmap,'full_class');
     }
     #
+    &Apache::lonhtmlcommon::Update_PrgWin($r,\%prog_state,&mt('Done'));
+    &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
+    #
     $r->print("</form>\n");
     $r->print("</body>\n</html>\n");
     $r->rflush();