#!/usr/bin/perl
#
# SmoothWall CGIs
#
# This code is distributed under the terms of the GPL
#
# (c) The SmoothWall Team
#

use strict;

# enable only the following on debugging purpose
#use warnings;
#use CGI::Carp 'fatalsToBrowser';

require '/var/ipfire/general-functions.pl';
require "${General::swroot}/lang.pl";
require "${General::swroot}/header.pl";

use POSIX();

#workaround to suppress a warning when a variable is used only once
my @dummy = ( ${Header::table2colour} );
undef (@dummy);

my %cgiparams=();
my %logsettings=();
my %ips=();
my %users=();
my %selected=();
my %checked=();
my @log=();
my $errormessage = '';

my %color = ();
my %mainsettings = ();
&General::readhash("${General::swroot}/main/settings", \%mainsettings);
&General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);

my @shortmonths = ( 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug',
	'Sep', 'Oct', 'Nov', 'Dec' );
my @longmonths = ( $Lang::tr{'january'}, $Lang::tr{'february'}, $Lang::tr{'march'},
	$Lang::tr{'april'}, $Lang::tr{'may'}, $Lang::tr{'june'}, $Lang::tr{'july'}, $Lang::tr{'august'},
	$Lang::tr{'september'}, $Lang::tr{'october'}, $Lang::tr{'november'},
	$Lang::tr{'december'} );

my @now = localtime();
my $dow = $now[6];	# day of week
my $doy = $now[7];	# day of year (0..364)
my $tdoy = $now[7];
my $year = $now[5]+1900;

$cgiparams{'DAY'} = $now[3]; 
$cgiparams{'MONTH'} = $now[4];
$cgiparams{'SOURCE_IP'} = 'ALL';
$cgiparams{'FILTER'} = "[.](gif|jpeg|jpg|png|css|js)\$";
$cgiparams{'ENABLE_FILTER'} = 'off';
$cgiparams{'ACTION'} = '';

&Header::getcgihash(\%cgiparams);
$logsettings{'LOGVIEW_REVERSE'} = 'off';
&General::readhash("${General::swroot}/logging/settings", \%logsettings);
${Header::viewsize} = defined ($logsettings{'LOGVIEW_VIEWSIZE'}) ? $logsettings{'LOGVIEW_VIEWSIZE'} : 150;

if ($cgiparams{'ACTION'} eq '')
{
	$cgiparams{'ENABLE_FILTER'} = 'on';
}

if ($cgiparams{'ACTION'} eq $Lang::tr{'restore defaults'})
{
	$cgiparams{'FILTER'} = "[.](gif|jpeg|jpg|png|css|js)\$";
	$cgiparams{'ENABLE_FILTER'} = 'off'; 
}

{
    my %save=();
    $save{'FILTER'} = $cgiparams{'FILTER'};
    $save{'ENABLE_FILTER'} = $cgiparams{'ENABLE_FILTER'};
    &General::writehash("${General::swroot}/proxy/viewersettings", \%save);
    &General::readhash("${General::swroot}/proxy/viewersettings", \%save);
}

my $start = ($logsettings{'LOGVIEW_REVERSE'} eq 'on') ? 0x7FFFF000 : 0;	#index of first line number to display

if ($ENV{'QUERY_STRING'} && $cgiparams{'ACTION'} ne $Lang::tr{'update'})
{
	my @temp = split(',',$ENV{'QUERY_STRING'});
 	$start = $temp[0];
 	$cgiparams{'MONTH'} = $temp[1];
 	$cgiparams{'DAY'} = $temp[2];  
	$cgiparams{'SOURCE_IP'} = $temp[3];
	$cgiparams{'USERNAME'} = $temp[4];
}

if (!($cgiparams{'MONTH'} =~ /^(0|1|2|3|4|5|6|7|8|9|10|11)$/) ||
        !($cgiparams{'DAY'} =~ /^(0|1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31)$/))
{
        $cgiparams{'DAY'} = $now[3];
        $cgiparams{'MONTH'} = $now[4];
}
elsif($cgiparams{'ACTION'} eq '>>')
{
        my @temp_then=();
        my @temp_now = localtime(time);
        $temp_now[4] = $cgiparams{'MONTH'};
        $temp_now[3] = $cgiparams{'DAY'};
	if ($cgiparams{'DAY'}) {
    	    @temp_then = localtime(POSIX::mktime(@temp_now) + 86400);
            ## Retrieve the same time on the next day +
            ## 86400 seconds in a day
    	    $cgiparams{'MONTH'} = $temp_then[4];
    	    $cgiparams{'DAY'} = $temp_then[3];
	} else {
    	    $temp_now[3] = 1;
    	    $temp_now[4] = ($temp_now[4]+1) %12;
    	    @temp_then = localtime(POSIX::mktime(@temp_now) );
	    @temp_then[3] = 0;
	}
        $cgiparams{'MONTH'} = $temp_then[4];
        $cgiparams{'DAY'} = $temp_then[3];
}
elsif($cgiparams{'ACTION'} eq '<<')
{
        my @temp_then=();
        my @temp_now = localtime(time);
        $temp_now[4] = $cgiparams{'MONTH'};
        $temp_now[3] = $cgiparams{'DAY'};
	if ($cgiparams{'DAY'}) {
    	    @temp_then = localtime(POSIX::mktime(@temp_now) - 86400);
            ## Retrieve the same time on the next day -
            ## 86400 seconds in a day
    	    $cgiparams{'MONTH'} = $temp_then[4];
    	    $cgiparams{'DAY'} = $temp_then[3];
	} else {
    	    $temp_now[3] = 1;
    	    $temp_now[4] = ($temp_now[4]-1) %12;
    	    @temp_then = localtime(POSIX::mktime(@temp_now) );
	    @temp_then[3] = 0;
	}
        $cgiparams{'MONTH'} = $temp_then[4];
        $cgiparams{'DAY'} = $temp_then[3];
}

# Find in which file.gz is the log. Can be calculated because WEEKLY ROTATING of *.log
my $gzindex;
my $daystr = $cgiparams{'DAY'} == 0 ? '' :$cgiparams{'DAY'} <= 9 ? "0$cgiparams{'DAY'}" : "$cgiparams{'DAY'}";

{
    my $xday;

    # Calculate time. If future date, calculate for past year !!!
    if (( $cgiparams{'MONTH'} eq $now[4]) && ($cgiparams{'DAY'} > $now[3]) ||
	( $cgiparams{'MONTH'}  > $now[4] ) ) {  
	$xday = POSIX::mktime( 0, 0, 0, $cgiparams{'DAY'}, $cgiparams{'MONTH'}, $year - 1901 );
	$daystr = "$longmonths[$cgiparams{'MONTH'}] $daystr, ". int($year-1);
    } else {
	$xday = POSIX::mktime( 0, 0, 0, $cgiparams{'DAY'}, $cgiparams{'MONTH'}, $year - 1900 );
	$daystr = "$longmonths[$cgiparams{'MONTH'}] $daystr, $year";
    }

    # calculate end of active week (saturday 23H59)
    my @then = ();
    @then = localtime(time());
    my $sunday = POSIX::mktime( 0, 0, 0, @then[3], @then[4], @then[5]);
       $sunday += (6-$then[6]) * 86400;

    # Convert delta in second to full weeks
    $gzindex = int (($sunday-$xday)/604800 );
}


my $filter = $cgiparams{'ENABLE_FILTER'} eq 'on' ? $cgiparams{'FILTER'} : '';
my $sourceip = $cgiparams{'SOURCE_IP'};
my $sourceall =  $cgiparams{'SOURCE_IP'} eq 'ALL' ? 1 : 0;
my $username = $cgiparams{'USERNAME'};
my $usersall =  $cgiparams{'USERNAME'} eq 'ALL' ? 1 : 0;

my $lines = 0;
my $temp = ();
my $thiscode = '$temp =~ /$filter/;';
eval($thiscode);
if ($@ ne '')
{
    $errormessage = "$Lang::tr{'bad ignore filter'}.$@<P>";
    $filter = '';
} else {
    my $loop = 1;
    my $filestr = 0;
    my $lastdatetime;		# for debug

    while ($gzindex >=0 && $loop) {
	# calculate file name
	if ($gzindex == 0) {
	    $filestr = "/var/log/squid/access.log";
	} else {
	    $filestr = "/var/log/squid/access.log.$gzindex";
	    $filestr = "$filestr.gz" if -f "$filestr.gz";
	}
	# now read file if existing
	if (open (FILE,($filestr =~ /.gz$/ ? "gzip -dc $filestr |" : $filestr))) {
	    #&General::log("reading $filestr");
    	    my @temp_now = localtime(time);
    	    $temp_now[4] = $cgiparams{'MONTH'};
    	    $temp_now[3] = $cgiparams{'DAY'};
	    if ( (  $cgiparams{'MONTH'} eq $now[4]) && ($cgiparams{'DAY'} > $now[3]) ||
	          ( $cgiparams{'MONTH'} > $now[4] ) ) {
		$temp_now[5]--;  	# past year
	    }

    	    $temp_now[2] = $temp_now[1] = $temp_now[0] = 0; # start at 00:00:00
	    $temp_now[3] = 1 if ($cgiparams{'DAY'}==0); # All days selected, start at '1'
            my $mintime = POSIX::mktime(@temp_now); 
	    my $maxtime;
	    if ($cgiparams{'DAY'}==0) {			# full month
	        if ($temp_now[4]++ == 12){
		    $temp_now[4] = 0;
		    $temp_now[5]++;
		};
        	$maxtime = POSIX::mktime(@temp_now); 
	    } else {
		$maxtime = $mintime + 86400;		# full day
	    }
	    READ:while (<FILE>) {
		my ($datetime,$do,$ip,$ray,$me,$far,$url,$so) = split;
		$ips{$ip}++;
		$users{$so}++;
		# for debug
		#$lastdatetime = $datetime;

		# collect lines between date && filter
		if (( ($datetime>$mintime)&&($datetime<$maxtime)) && !($url =~ /$filter/) &&
		   ((($ip eq $sourceip) || $sourceall)) &&
		   ((($so eq $username) || $usersall)))
		{
		    # when standart viewing, just keep in memory the correct slices
		    # it starts a '$start' and size is $viewport
		    # If export, then keep all lines...
		    if ($cgiparams{'ACTION'} eq $Lang::tr{'export'}){
		        $log[$lines++] = "$datetime $ip $so $url";
		    } else {
			if ($lines++ < ($start + $Header::viewsize)) {
			    push(@log,"$datetime $ip $so $url");
			    if (@log > $Header::viewsize) {
				shift (@log);
			    }
			#} else { dont do this optimisation, need to count lines !
			#    $datetime = $maxtime; # we have read viewsize lines, stop main loop
			#    last READ;		  # exit read file
			}
		    }	
		}

		# finish loop when date of lines are past maxtime
		$loop = ($datetime < $maxtime);
	    }
	    close (FILE);
	}
	$gzindex--;	# will try next gz file eg 40,39,38,.... because it may have holes when ipfire stopped
			# for a long time

    }

    #$errormessage="$errormessage$Lang::tr{'date not in logs'}: $filestr $Lang::tr{'could not be opened'}";
    if (0) { # print last date record read
	my ($SECdt, $MINdt, $HOURdt, $DAYdt, $MONTHdt, $YEARdt) = localtime($lastdatetime);
	$SECdt = sprintf ("%.02d",$SECdt);
	$MINdt = sprintf ("%.02d",$MINdt);
	$HOURdt = sprintf ("%.02d",$HOURdt);
	$DAYdt = sprintf ("%.02d",$DAYdt);
	$MONTHdt = sprintf ("%.02d",$MONTHdt+1);
	$YEARdt = sprintf ("%.04d",$YEARdt+1900);
	&General::log ("$HOURdt:$MINdt:$SECdt, $DAYdt/$MONTHdt/$YEARdt--");
    }
}

if ($cgiparams{'ACTION'} eq $Lang::tr{'export'})
{
	print "Content-type: text/plain\n\n";
	print "IPFire proxy log\r\n";
	print "$Lang::tr{'date'}: $daystr\r\n"; 
	print "Source IP: $cgiparams{'SOURCE_IP'}\r\n";
	print "Username: $cgiparams{'USERNAME'}\r\n";
	if ($cgiparams{'ENABLE_FILTER'} eq 'on') {
		print "Ignore filter: $cgiparams{'FILTER'}\r\n"; }
	print "\r\n";

	if ($logsettings{'LOGVIEW_REVERSE'} eq 'on') { @log = reverse @log; }

	foreach $_ (@log) {
	    my ($datetime,$ip,$so,$url) = split;
	    my ($SECdt, $MINdt, $HOURdt, $DAYdt, $MONTHdt, $YEARdt) = localtime($datetime);
	    $SECdt = sprintf ("%.02d",$SECdt);
	    $MINdt = sprintf ("%.02d",$MINdt);
	    $HOURdt = sprintf ("%.02d",$HOURdt);
	    if ($cgiparams{'DAY'}==0) {			# full month
		$DAYdt = sprintf ("%.02d",$DAYdt);
		print "$DAYdt/$HOURdt:$MINdt:$SECdt $ip $so $url\n";
	    } else {
		print "$HOURdt:$MINdt:$SECdt $ip $so $url\n";
	    }
	}
	exit;
}

$selected{'SOURCE_IP'}{$cgiparams{'SOURCE_IP'}} = "selected='selected'";
$selected{'USERNAME'}{$cgiparams{'USERNAME'}} = "selected='selected'";

$checked{'ENABLE_FILTER'}{'off'} = '';
$checked{'ENABLE_FILTER'}{'on'} = '';
$checked{'ENABLE_FILTER'}{$cgiparams{'ENABLE_FILTER'}} = "checked='checked'";

&Header::showhttpheaders();

&Header::openpage($Lang::tr{'proxy log viewer'}, 1, '');

&Header::openbigbox('100%', 'left', '', $errormessage);

if ($errormessage) {
	&Header::openbox('100%', 'left', $Lang::tr{'error messages'});
	print "<font class='base'>$errormessage&nbsp;</font>\n";
	&Header::closebox();
}

&Header::openbox('100%', 'left', "$Lang::tr{'settings'}:");

print <<END
<form method='post' action='$ENV{'SCRIPT_NAME'}'>
<table width='100%'>
<tr>
	<td width='10%' class='base'>$Lang::tr{'month'}:</td>
	<td width='20%'>
	<select name='MONTH'>
END
;

for (my $month = 0; $month < 12; $month++)
{
	print "\t<option ";
	if ($month == $cgiparams{'MONTH'}) {
		print "selected='selected' "; }
	print "value='$month'>$longmonths[$month]</option>\n";
}
print <<END
	</select>
	</td>
	<td width='10%' class='base' align='right'>$Lang::tr{'day'}:&nbsp;</td>
	<td width='10%'>
	<select name='DAY'>
END
;
print "<option value='0'>$Lang::tr{'all'}</option>";
for (my $day = 1; $day <= 31; $day++) 
{
	print "\t<option ";
	if ($day == $cgiparams{'DAY'}) {
		print "selected='selected' "; }
	print "value='$day'>$day</option>\n";
}
print <<END
	</select>
	</td>
	<td width='5%'  align='center'><input type='submit' name='ACTION' title='$Lang::tr{'day before'}' value='&lt;&lt;' /></td>
	<td width='5%'  align='center'><input type='submit' name='ACTION' title='$Lang::tr{'day after'}' value='&gt;&gt;' /></td>
	<td width='25%' class='base'>$Lang::tr{'source ip'}:</td>
	<td width='15%'>
	<select name='SOURCE_IP'>
	<option value='ALL' $selected{'SOURCE_IP'}{'ALL'}>$Lang::tr{'caps all'}</option>
END
;
foreach my $ip (sort keys %ips) {
	print "<option value='$ip' $selected{'SOURCE_IP'}{$ip}>$ip</option>\n"; }
print <<END
	</select>
	</td>
</tr>
<tr>
	<td width='60%' colspan='6'>&nbsp;</td>
	<td width='25%' class='base'>$Lang::tr{'advproxy NCSA username'}:</td>
	<td width='15%'>
	<select name='USERNAME'>
	<option value='ALL' $selected{'USERNAME'}{'ALL'}>$Lang::tr{'caps all'}</option>
END
;
foreach my $so (sort keys %users) {
	print "<option value='$so' $selected{'USERNAME'}{$so}>$so</option>\n"; }
print <<END
	</select>
	</td>
</tr>
<tr>
	<td class='base'>$Lang::tr{'ignore filter'}:</td>
	<td colspan='5'><input type='text' name='FILTER' value='$cgiparams{'FILTER'}' size='40' /></td>
	<td class='base'>$Lang::tr{'enable ignore filter'}:</td>
	<td><input type='checkbox' name='ENABLE_FILTER' value='on' $checked{'ENABLE_FILTER'}{'on'} /></td>
</tr>
</table>
<div align='center'>
<table width='50%'>
<tr>
	<td align='center'><input type='submit' name='ACTION' value='$Lang::tr{'restore defaults'}' /></td>
	<td align='center'><input type='submit' name='ACTION' value='$Lang::tr{'update'}' /></td>
	<td align='center'><input type='submit' name='ACTION' value='$Lang::tr{'export'}' /></td>
</tr>
</table>
</div>
</form>
END
;

&Header::closebox();
&Header::openbox('100%', 'left', $Lang::tr{'log'});


$start = $lines - ${Header::viewsize} if ($start >= $lines - ${Header::viewsize});
$start = 0 if ($start < 0);

my $prev;
    if ($start == 0) {
	$prev = -1;
    } else {
	$prev = $start - ${Header::viewsize};
	$prev = 0 if ( $prev < 0);
    }

my $next;
    if ($start == $lines - ${Header::viewsize}) {
	$next = -1;
    } else {
	$next = $start + ${Header::viewsize};
	$next = $lines - ${Header::viewsize} if ($next >= $lines - ${Header::viewsize});
    }

if ($logsettings{'LOGVIEW_REVERSE'} eq 'on') { @log = reverse @log; }

print "<p><b>$Lang::tr{'web hits'} $daystr: $lines</b></p>";
if ($lines != 0) { &oldernewer(); }
print <<END
<table width='100%'>
<tr>
<td width='10%' align='center' class='boldbase'><b>$Lang::tr{'time'}</b></td>
<td width='15%' align='center' class='boldbase'><b>$Lang::tr{'source ip'}</b></td>
<td width='12%' align='center' class='boldbase'><b>$Lang::tr{'advproxy NCSA username'}</b></td>
<td width='63%' align='center' class='boldbase'><b>$Lang::tr{'website'}</b></td>
</tr>
END
;
my $ll = 0;
foreach $_ (@log)
{
	if ($ll % 2) {
		print "<tr bgcolor='$color{'color20'}'>\n"; }
	else {
		print "<tr bgcolor='$color{'color20'}'>\n"; }
	my ($datetime,$ip,$so,$url) = split;
        my ($SECdt, $MINdt, $HOURdt, $DAYdt, $MONTHdt, $YEARdt) = localtime($datetime);
	$SECdt = sprintf ("%.02d",$SECdt);
	$MINdt = sprintf ("%.02d",$MINdt);
	$HOURdt = sprintf ("%.02d",$HOURdt);

	$url =~ /(^.{0,60})/;
	my $part = $1;
	unless (length($part) < 60) { $part = "${part}..."; }  
	$url = &Header::cleanhtml($url,"y");
	$part = &Header::cleanhtml($part,"y");
	if ($cgiparams{'DAY'}==0) {			# full month
	    $DAYdt = sprintf ("%.02d/",$DAYdt);
	} else {
	    $DAYdt='';
	}
	print <<END
	<td align='center'>$DAYdt$HOURdt:$MINdt:$SECdt</td>
	<td align='center'>$ip</td>
	<td align='center'>$so</td>
	<td align='left'><a href='$url' title='$url' target='_new'>$part</a></td>
</tr>
END
	;
	$ll++;
}

print "</table>";

&oldernewer();

&Header::closebox();

&Header::closebigbox();

&Header::closepage();


sub oldernewer
{
print <<END
<table width='100%'>
<tr>
END
;

print "<td align='center' width='50%'>";
if ($prev != -1) {
        print "<a href='/cgi-bin/logs.cgi/proxylog.dat?$prev,$cgiparams{'MONTH'},$cgiparams{'DAY'},$cgiparams{'SOURCE_IP'},$cgiparams{'USERNAME'}'>$Lang::tr{'older'}</a>"; }
else {
        print "$Lang::tr{'older'}"; }
print "</td>\n";

print "<td align='center' width='50%'>";
if ($next >= 0 ) {
        print "<a href='/cgi-bin/logs.cgi/proxylog.dat?$next,$cgiparams{'MONTH'},$cgiparams{'DAY'},$cgiparams{'SOURCE_IP'},$cgiparams{'USERNAME'}'>$Lang::tr{'newer'}</a>"; }
else {
        print "$Lang::tr{'newer'}"; }
print "</td>\n";

print <<END
</tr>
</table>
END
;
}

