#!/usr/bin/perl
$|=1;
# The LearningOnline Network with CAPA
# User Status
# (Versions
# (Running loncron
# 09/06/01 Gerd Kortemeyer)
# 02/18/02,02/19/02 Gerd Kortemeyer)

use strict;
use lib '/home/httpd/lib/perl/';
use LONCAPA::Configuration;

use HTTP::Headers;
use IO::File;


my %usercount;
my @actl=('Active','Moderately Active','Inactive');

 
print "Content-type: text/html\n\n";
      
# -------------------- Read loncapa.conf (and by default, loncapa_apache.conf).
&main();

sub analyze_time {
    my ($since)=@_;
    my $color="#000000";
    my $userclass=$actl[0];
    if ($since>300) { $color="#222222"; }
    if ($since>600) { $color="#444444"; }
    if ($since>3600) { $color="#666666"; $userclass=$actl[1]; }
    if ($since>7200) { $color="#888888"; }
    if ($since>21600) { $color="#AAAAAA"; $userclass=$actl[2]; }
    return ($color,$userclass);
}

sub add_count {
    my ($cat,$scope,$class)=@_;
    if (!defined($usercount{$cat})) {
	$usercount{$cat}={};
    }
    if (!defined($usercount{$cat}{$scope})) {
	$usercount{$cat}{$scope}={};
    }
    $usercount{$cat}{$scope}{$class}++;
}

sub main {
    my $perlvar=LONCAPA::Configuration::read_conf('loncapa.conf');
    delete $$perlvar{'lonReceipt'}; # remove since sensitive and not needed
    delete $$perlvar{'lonSqlAccess'}; # remove since sensitive and not needed

    my $oneline=($ENV{'QUERY_STRING'} eq 'simple');
    my $justsummary=($ENV{'QUERY_STRING'} eq 'summary');
    unless ($oneline) { print "<html><body bgcolor=#FFFFFF>\n<h1>User Status ".localtime()."</h1>"; }

    opendir(DIR,$$perlvar{'lonIDsDir'});
    my @allfiles=(sort(readdir(DIR)));
    foreach my $filename (@allfiles) {
	if ($filename=~/^\./) { next; }
	my ($dev,$ino,$mode,$nlink,
	    $uid,$gid,$rdev,$size,
	    $atime,$mtime,$ctime,
	    $blksize,$blocks)=stat($$perlvar{'lonIDsDir'}.'/'.$filename);
	my $now=time;
	my $since=$now-$mtime;
	my $sinceacc=$now-$atime;
	unless ($oneline || $justsummary) { print ("\n\n<hr />"); }
	my %userinfo;
	my $fh=IO::File->new($$perlvar{'lonIDsDir'}.'/'.$filename);
	while (my $line=<$fh>) {
	    chomp($line);
	    my ($name,$value)=split(/\=/,$line);
	    $userinfo{$name}=$value;
	}
	$fh->close();
	my ($color,$userclass)=&analyze_time($since);
	&add_count('Overall','all',$userclass);
	&add_count('Domain',$userinfo{'user.domain'},$userclass);
	
	unless ($oneline) {
	    if (!$justsummary) {
		print '<font color="'.$color.'">';
		print '<h3>'.$userinfo{'environment.lastname'}.', '.
		    $userinfo{'environment.firstname'}.' '.
		    $userinfo{'environment.middlename'}.' '.
		    $userinfo{'environment.generation'}." (".
		    $userinfo{'user.name'}."\@".$userinfo{'user.domain'}.
		    ")</h3>\n<b>Login time:</b> ".
		    localtime($userinfo{'user.login.time'}).
		    ' <b>Browser</b>: '.$userinfo{'browser.type'}." <b>Client:</b> ".
		    $userinfo{'request.host'}."<br />\n<b>Role: </b>".
		    $userinfo{'request.role'}." ";
	    }
	    &add_count('Browser',$userinfo{'browser.type'},$userinfo{'browser.version'});
	    if ($userinfo{'request.course.id'}) {
		my $cid=$userinfo{'request.course.id'};
		my $coursename= $userinfo{'course.'.$cid.'.description'}.
		    ' ('.$cid.')';
		if (!$justsummary) { print "<b>Course:</b> ".$coursename; }
		&add_count('Course',$coursename,$userclass);
	    } else {
		if (!$justsummary) { print "Not in a course."; }
		&add_count('Course','No Course',$userclass);
	    }
	    if (!$justsummary) {
		print "<br /><b>Last Transaction:</b> ".localtime($mtime).
		    " (".$since." secs ago) <br /><b>Last Access:</b> ".
		    localtime($atime)." (".$sinceacc." secs ago)";
		print ("</font>"); 
	    }
	}
    }
    closedir(DIR);
    open (LOADAVGH,"/proc/loadavg");
    my $loadavg=<LOADAVGH>;
    close(LOADAVGH);
    unless ($oneline) { 
	print "<hr /><h2>User Counts</h2>";
#	print "<pre>\n";
	&showact('Overall',%usercount);
	&showact('Domain',%usercount);
	&showact('Course',%usercount);
	&show('Browser',%usercount);

#	print "\n</pre>";
	print "<b>Load Average:<b> ".$loadavg;
	print "</body></html>";
    } else {
	foreach (sort keys %usercount) {
	    print $_.'='.$usercount{$_}.'&';
	}
	print 'loadavg='.$loadavg;
    }
}

sub show {
    my ($cat,%usercount)=@_;
    print("<h3>$cat</h3>\n");
    foreach my $type (sort(keys(%{$usercount{$cat}}))) {
	print("<table border='1'><tr><th>$type</th><th>");
	print(join("</th><th>",sort(keys(%{$usercount{$cat}{$type}}))));
	my $temp;
	my $count=0;
	foreach my $version (sort(keys(%{$usercount{$cat}{$type}}))) {
	    $temp.="<td>".$usercount{$cat}{$type}{$version}.
		"</td>";
	    $count+=$usercount{$cat}{$type}{$version};
	}
	print("</th></tr><tr><td>$count</td>");
	print($temp."</tr></table>\n");
    }    
}

sub showact {
    my ($cat,%usercount)=@_;
    print("<h3>$cat</h3>\n");
    
    print("<table border='1'><tr><th></th><th>");
    print(join("</th><th>",('Any',@actl)));
    print("</th></tr>");
    foreach my $type (sort(keys(%{$usercount{$cat}}))) {
	print("<tr><td>$type</td>");
	my $temp;
	my $count=0;
	foreach my $activity (@actl) {
	    $temp.="<td>&nbsp;".$usercount{$cat}{$type}{$activity}."</td>";
	    $count+=$usercount{$cat}{$type}{$activity};
	}
	print("<td>$count</td>");
	print($temp);
    }    
    print("</tr></table>\n");
}

