<?php
error_reporting(E_ALL);
$ip = trim($_GET['ip']);
$token = trim($_GET['token']);
$action = trim($_GET['action']);
$db = new mysqli('localhost', 'ban', 'Blubb123-', 'ban');
if ($db->connect_errno){
    die($db->connect_error);
}
$db->set_charset('utf8');

function checkToken($token,$db) {
    $dbAction = $db->prepare("SELECT description FROM clients WHERE token = ?");
    $dbAction->bind_param('s',$token);
    $dbAction->execute();
    $dbAction->store_result();
    $dbAction->bind_result($desc);
    $dbAction->fetch();
    if ($dbAction->num_rows() == 1){
        echo "Client $desc";
        return true;
    }
    return false;
}

function checkAdmin($token,$db) {
    $dbAction = $db->prepare("SELECT description FROM clients WHERE token = ?");
    $dbAction->bind_param('s',$token);
    $dbAction->execute();
    $dbAction->store_result();
    $dbAction->bind_result($desc);
    $dbAction->fetch();
    if ($dbAction->num_rows() == 1){
        if($desc == 'admin') {
            return true;
        }
    }
    return false;
}

function set($ip,$db) {
    $dbAction = $db->prepare("INSERT IGNORE INTO list VALUES (?)");
    $dbAction->bind_param('i',ip2long($ip));
    return $dbAction->execute();
}

function islisted($ip,$db) {
    $dbAction = $db->prepare("SELECT ip FROM list WHERE ip = ?");
    $dbAction->bind_param('i',ip2long($ip));
    $dbAction->execute();
    if($dbAction->num_rows() == 0) {
        return false;
    }
    return true;
}
function delist($ip,$db) {
    if(!islisted($ip,$db)) {
        echo $ip . " not listed";
        return false;
    }
    $dbAction = $db->prepare("INSERT INTO delist (ip) VALUES (?) ON DUPLICATE KEY UPDATE count = count + 1");
    $dbAction->bind_param('i',ip2long($ip));
    $dbAction->execute();
    $dbAction = $db->prepare("SELECT count FROM delist WHERE ip = ?");
    $dbAction->bind_param('i',ip2long($ip));
    $dbAction->execute();
    $dbAction->store_result();
    $dbAction->bind_result($count);
    $dbAction->fetch();
    if ($count > 3){
        echo "Fatal: ". $ip . " delisted to often!" . PHP_EOL;
        return false;
    }
    $dbAction = $db->prepare("DELETE FROM list WHERE ip = ?");
    $dbAction->bind_param('i',ip2long($ip));
    $dbAction->execute();
    return true;
}
switch($action) {
    case 'delist':
        if(delist($ip,$db)){
            echo "$ip delisted" . PHP_EOL;
        } else {
            echo "$ip not delisted" . PHP_EOL;
        };
        break;
    case 'blacklist':
        break;
    default:
        if (checkToken($token,$db)){
            if(set($ip,$db)){
                echo " inserted $ip" . PHP_EOL;
            } else {
                echo " fehler" . PHP_EOL;
            };
        } else {
            echo "Client token $token not registered" . PHP_EOL;
        };
}