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<?php

/* Add a logged in user to the list of users online (part of the statistics
* measuring code). The list is stored as a list of usernames. */
function addUser($userName)
{
$fileC = file("db/forumOnlineUsers.dat",FILE_IGNORE_NEW_LINES);

$updated = false;
for ($i = 0; $i < sizeOf($fileC); $i += 2)
{
if ($fileC[$i] == $userName)
{
$fileC[$i+1] = time();
$updated = true;
}
}

if (!$updated)
{
array_push($fileC, $userName);
array_push($fileC, time());
}

$str = "";
foreach ($fileC as $line)
{
$str .= $line."\n";
}
file_put_contents("db/forumOnlineUsers.dat",$str);
}

/* Add a guest to the list of guests online (part of the statistics
* measuring code). The list is stored as a list of IP addresses. */
function addGuest($ip)
{
$fileC = file("db/forumOnlineGuests.dat",FILE_IGNORE_NEW_LINES);

$updated = false;
for ($i = 0; $i < sizeOf($fileC); $i += 2)
{
if ($fileC[$i] == $ip)
{
$fileC[$i+1] = time();
$updated = true;
}
}

if (!$updated)
{
array_push($fileC, $ip);
array_push($fileC, time());
}

$str = "";
foreach ($fileC as $line)
{
$str .= $line."\n";
}
file_put_contents("db/forumOnlineGuests.dat",$str);
}

/* This function is called before statistics are display on the index page
* to discard any people in the online lists who haven't been active within
* the last five minutes. */
function purge()
{
$fileC = file("db/forumOnlineGuests.dat",FILE_IGNORE_NEW_LINES);
$str = "";
for ($i = 0; $i < sizeOf($fileC)-1; $i += 2)
{
if (time() - $fileC[$i+1] <= 300)
{
$str .= $fileC[$i]."\n".$fileC[$i+1]."\n";
}
}
if (trim($str) != "")
{
file_put_contents("db/forumOnlineGuests.dat",$str);
}
else
{
file_put_contents("db/forumOnlineGuests.dat","");
}

$fileC = file("db/forumOnlineUsers.dat",FILE_IGNORE_NEW_LINES);
$str = "";
for ($i = 0; $i < sizeOf($fileC)-1; $i += 2)
{
if (time() - $fileC[$i+1] <= 300)
{
$str .= $fileC[$i]."\n".$fileC[$i+1]."\n";
}
}
if (trim($str) != "")
{
file_put_contents("db/forumOnlineUsers.dat",$str);
}
else
{
file_put_contents("db/forumOnlineUsers.dat","");
}
}

/* Called when a user logs out to forcibly remove them from the online
* users list. */
function removeUser($userName)
{
$fileC = file("db/forumOnlineUsers.dat",FILE_IGNORE_NEW_LINES);
$str = "";
for ($i = 0; $i < sizeOf($fileC)-1; $i += 2)
{
if ($fileC[$i] != $userName)
{
$str .= $fileC[$i]."\n".$fileC[$i+1]."\n";
}
}
if (trim($str) != "")
{
file_put_contents("db/forumOnlineUsers.dat",$str);
}
else
{
file_put_contents("db/forumOnlineUsers.dat","");
}
}

/* Called when a user logs in to forcibly remove them from the online
* guests list. */
function removeGuest($ip)
{
$fileC = file("db/forumOnlineGuests.dat",FILE_IGNORE_NEW_LINES);
$str = "";
for ($i = 0; $i < sizeOf($fileC)-1; $i += 2)
{
if ($fileC[$i] != $ip)
{
$str .= $fileC[$i]."\n".$fileC[$i+1]."\n";
}
}
if (trim($str) != "")
{
file_put_contents("db/forumOnlineGuests.dat",$str);
}
else
{
file_put_contents("db/forumOnlineGuests.dat","");
}
}
?>
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