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#!/usr/bin/perl
#
# Flexible MRTG index page
#
# Based on original work done by mick@lowdown.com, mostly rewritten
# by Hamish@zot.org
#
# (c) 1997, Mick Ghazey mick@lowdown.com
# Thanks to Dave Rand, Peter W. Osel and Tobias Oetiker.
#
# Requires the CGI package (in mandriva this is perl-CGI)

use strict;
use warnings;

use CGI ':all';
use CGI::Carp qw(fatalsToBrowser);
use Sys::Hostname;

my @config_files = (
'/etc/mrtg.cfg',
'/usr/share/WWW/mrtg/mrtg.cfg',
);

# FIXME - globals
my $gifdone = 0; # Scan for newest graph and save info for later
my $warnings;

sub init_tests(@) {
my (@config_files) = @_;

my $xsize_default = 500;
my $testmax=0;
my @list;
my %tests;

while(@config_files > 0){
my $cfg;

if (!open(In, $cfg = shift @config_files) ) {
$warnings .= "Warning: Could not open $cfg file\n";
next;
}

while(<In>){

#TODO - parse WorkDir: directives
#TODO - instantiate new tests from the "_" defaults

if ( $_ =~ /^([^#[][^[]+)\[(.*)\]:\s*(.+)$/ ) {
my $testnr;
my $var=lc $1;
my $testname=lc $2;
my $val=$3;

my $this_ysize;
my $this_xsize;
my $this_title;

if ( $var eq 'ysize' ) {
$this_ysize = $val +35;
} elsif ( $var eq 'xsize' ) {
$this_xsize = $val +100;
# FIXME - quick-hack
if ( $testname eq '_' ) {
$xsize_default = $this_xsize;
}
} elsif ( $var eq 'title' ) {
$this_title = $val;
}

# Skip any default initializers
if ($testname eq '_') {
next;
}
if ($testname eq '^') {
next;
}

if (! exists $tests{$testname}) {
$tests{$testname}=$testmax;
$list[$testmax]->{name} = $testname;
$list[$testmax]->{xsize} = $xsize_default;
$testnr = $testmax;
# TODO - replace testmax with (scalar @list)
$testmax++;
} else {
$testnr=$tests{$testname};
}

$list[$testnr]->{ysize} = $this_ysize if $this_ysize;
$list[$testnr]->{xsize} = $this_xsize if $this_xsize;
$list[$testnr]->{title} = $this_title if $this_title;
}
}
close In;
}

# check and update details for all known tests;
for my $i (@list) {
my $testname = $i->{name};
if (!exists($i->{title})) {
$i->{title}='UNTITLED';
}

# Default is GIF, unless a PNG file exists
$i->{imagetype} = 'gif';
if ( -e "$testname-day.png" ) {
$i->{imagetype} = "png";
}

# TODO - change the filename based on the displayed period
my $filename = $testname . "-day." . $i->{imagetype};
my ($dev, $ino, $mode, $nlink, $uid, $gid, $rdev, $size,
$atime,$mtime,$ctime,$blksize,$blocks)
= stat($filename);
if (!defined $mtime) {
# if we cannot stat the file, skip it
next;
}

$i->{mtime} = $mtime;

# find the newest file
if ($mtime > $gifdone) {
$gifdone = $mtime;
}
}

return @list;
}

sub init_lists(@) {
my (@tests) = @_;

my $l;

my %hostlist;
my %hosttypelist;
my %hosttypecount;

@{$l->{ALL}->{ALL}}=@tests;

for my $i (0..$#tests) {
my $testname = $tests[$i]->{name};

# Do not classify any test with no separators in it
if ($testname !~ /,/) {
push @{$l->{OTHER}->{OTHER}}, $tests[$i];
next;
}

my ($group,$host,$test) = split ',', $testname;

if (defined $group) {
push @{$l->{GROUP}->{$group}}, $tests[$i];
}
if (defined $host) {
push @{$l->{HOST}->{$host}}, $tests[$i];
}
if (defined $test) {
push @{$l->{TEST}->{$test}}, $tests[$i];
}

# TODO - this needs to have a better way...
# hosttype is the non digit hostname prefix - thus
# "proxy-1" and "proxy-2" would both end up in the
# "proxy-" hosttype
if ($host =~ m/^(.*[^0-9])(\d+)$/) {
my $hosttype = $1.'*';

# count each host only once
if (!defined $hostlist{$host}) {
$hostlist{$host}=1;
$hosttypecount{$hosttype}++;
}

push @{$hosttypelist{$hosttype}}, $tests[$i];
}
}

for my $i (keys %hosttypelist) {
if ($hosttypecount{$i} >1) {
push @{$l->{TYPE}->{$i}}, @{$hosttypelist{$i}};
}
}
return $l;
}

my @tests = init_tests(@config_files);
my $lists = init_lists(@tests);

#use Data::Dumper;
#print Dumper(\@tests);
#print Dumper(\$lists);

# FIXME - globals
# Time the next update to occur a little while after the next interval completes
my $interval = 300; # 5 min update interval
my $guardband = 15; # updates occur this many seconds after predicted gif completion
my $refresh = $interval + $guardband + $gifdone - time; # predict how long until next update
$refresh = $interval if $refresh <= $guardband;
my $expires = gmtime (time + $interval * 2 + $guardband);

#selfurl is ready to append args to.
my $selfurl = url(-relative=>1).'?';
my $this_host = hostname;

print header, start_html(-TITLE=>"$this_host MRTG Index", -BGCOLOR=>'#e6e6e6'),
"\n";

# FIXME - use something that doesnt make "&" into "&amp;" in the <a> tags
# you mean, like, a form?. well, duh!

my @wantlist = split /,/,param('list');

if (!@wantlist) {
print table({-width=>"100\%"}, TR(td("Select which list to show")));
print "\n<table border=2 cellpadding=4 cellspacing=0 style=\"margin: 1em 1em 1em 0; background: #f9f9f9; border: 1px #aaa solid; border-collapse: collapse; font-size: 95%;\">\n";
print "<tr>\n";
for my $i (sort keys %{$lists}) {
print "<th>$i</th>\n";
}
print "</tr><tr>\n";
for my $i (sort keys %{$lists}) {
print " <td valign=top>\n";
for my $j (sort keys %{$lists->{$i}}) {
print " ".a({-href=>$selfurl."list=$i,$j"},"$j")."<br>\n";
}
print " </td>\n";
}
print "</tr></table>\n";
} elsif (!defined $lists->{$wantlist[0]}->{$wantlist[1]}) {
#FIXME
print table({-width=>"100\%"}, TR(td("That list is unavailable")));
} else {
my @list = @{$lists->{$wantlist[0]}->{$wantlist[1]}};
$selfurl.='list='.param('list').'&';

my $graph='day';
my $graph_unchecked='day';
if (defined param('graph')) {
$graph_unchecked=param('graph');
}

print
"<meta http-equiv=\"expires\" content=\"$expires GMT\">\n",
"<meta http-equiv=\"refresh\" content=$refresh>\n";
print "<table>\n",
"<tr><td>Click graph for more info\n",
"<tr><td>";
if ($graph_unchecked ne 'day') {
print a({-href=>$selfurl.'graph=day&'}, 'Daily')
} else {
print 'Daily';
}
print '&nbsp;';
if ($graph_unchecked ne 'week') {
print a({-href=>$selfurl.'graph=week&'}, 'Weekly')
} else {
print 'Weekly';
$graph = $graph_unchecked;
}
print '&nbsp;';
if ($graph_unchecked ne 'month') {
print a({-href=>$selfurl.'graph=month&'}, 'Monthly')
} else {
print 'Monthly';
$graph = $graph_unchecked;
}
print '&nbsp;';
if ($graph_unchecked ne 'year') {
print a({-href=>$selfurl.'graph=year&'}, 'Yearly')
} else {
print 'Yearly';
$graph = $graph_unchecked;
}
print '&nbsp;';
print a({-href=>url(-relative=>1)}, 'Change List'),
'&nbsp;',
'(Current List is ',param('list'),")\n",
"</table>\n";

if ($graph ne 'day') {
$selfurl.='graph='.$graph.'&';
}
my @display_order = (0..$#list);
@display_order = split /:/, param('ord') if defined param('ord');

for my $index (0..$#list){
my @spliced = @display_order;
my $router_num = splice @spliced, $index, 1; # Router removed
my $router = $list[$router_num];
# FIXME - what if mtime is undef?
my $time = localtime $router->{mtime}; # $st_mtime saved in above loop
($time) = $time =~ /(\d+:\d+:\d+)/; # Just the time
print hr, "\n";

print a({-name=>$index});
# Print re-ordering links top, bot, up, dn
my $mv_dn = "";
my $mv_up = "";
$" = ':';
if($index > 0){
my @top = ($router_num, @spliced);
my @up = @spliced;
my $indxup = $index - 1;
splice @up, $indxup, 0, $router_num;

# FIXME - need a way to append this correctly ..
$mv_up = sprintf "%s %s ", a({-href=>$selfurl."ord=@top#0"}, "Top"), # move to top
a({-href=>$selfurl."ord=@up#$indxup"}, "Up"); # move up
}
if($index < $#list){
my @bot = (@spliced, $router_num);
my @down = @spliced;
my $indxdn = $index + 1;
splice @down, $indxdn, 0, $router_num;

my $indxbot = @list - 3;
while($indxbot < 0){$indxbot += 1}
$mv_dn = sprintf "%s %s ", a({-href=>$selfurl."ord=@down#$indxdn"}, "Down"), # move down
a({-href=>$selfurl."ord=@bot#$indxbot"}, "Bot"); # move to bottom
}
undef $";

print table({-width=>"100\%"},
TR(
td({-align=>"left",-width=>"20\%"}, "$mv_up $mv_dn"),
td({-align=>"left"},
b($router->{title}),
" $time")
)
);

my ($ysize, $xsize);
if ( exists $router->{ysize} ) {
$ysize = $router->{ysize};
} else {
$ysize = "135";
}
if ( exists $router->{xsize} ) {
$xsize = $router->{xsize};
} else {
$xsize = "400";
}
print a({-href=>$router->{name}.".html"}, img{-src=>$router->{name}."-$graph.".$router->{imagetype}, -height=>"$ysize", -width=>"$xsize"});

}
}

if ($warnings) {
print "<pre>\n", "$warnings", "</pre>\n";
}

#print "\n",hr,"Direct questions and feedback to Mick Ghazey: ",
# a({-href=>"mailto:mick\@lowdown.com"}, "mick\@lowdown.com"),
# end_html;
print "\n",hr,"Direct questions and feedback to ",
a({-href=>"mailto:hamish\@zot.org"}, "Hamish"),
end_html;

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