<?php
session_start();

$config =  json_decode(file_get_contents('dynmap_config.json'), true);
$msginterval = $config['webchat-interval'];

if($_SERVER['REQUEST_METHOD'] == 'POST' && $_SESSION['lastchat'] < time())
{
    $micro = explode(' ', microtime());
    $timestamp = $micro[1].round($micro[0]*1000);

    $data = json_decode(trim(file_get_contents('php://input')));
    $data->timestamp = $timestamp;
    $old_messages = json_decode(file_get_contents('dynmap_webchat.json'), true);
    if(!empty($old_messages))
    {
        foreach($old_messages as $message)
        {
            if(($timestamp - $config['updaterate'] - 10000) < $message['timestamp'])
                $new_messages[] = $message;
        }
    }
    $new_messages[] = $data;
    file_put_contents('dynmap_webchat.json', json_encode($new_messages));
    $_SESSION['lastchat'] = time()+$msginterval;
}
elseif($_SERVER['REQUEST_METHOD'] == 'POST' && $_SESSION['lastchat'] > time())
{
    header('HTTP/1.1 403 Forbidden');
}

?>