<?php
/**
 * Simple method which performs a login operation to Polish reddit-like "wykop.pl"
 * and fetches the number of notifications.
 *
 * @todo This is made just for fun! My activity on the websites was too low to
 * be granted access to Wykop API.
 *
 * @param string $operation token, login, notifs
 * @param string $username
 * @param string $passwod
 * @return int|string notifs count, token
 */
function wykopnotifs($operation = 'token', $username = null, $password = null)
{
    //start curl
    $ch =  curl_init();
    $useragent = 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0.2) Gecko/20100101 Firefox/10.0.2';

    switch ($operation) {
        case 'notifs':
            $url = 'https://www.wykop.pl/powiadomienia/do-mnie/';
            break;
        case 'login':
            $token = wykopnotifs('token');
            curl_setopt( $ch, CURLOPT_POST, true );
            curl_setopt( $ch, CURLOPT_POSTFIELDS, 'user[username]=' . $username . '&user[password]=' . $password . '&__token=' . $token . '&submit=login' );
        case 'token':
            $url = 'https://www.wykop.pl/zaloguj/';
            break;
    }

    curl_setopt( $ch, CURLOPT_URL, $url );
    curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
    curl_setopt( $ch, CURLOPT_AUTOREFERER, true );
    curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, true );
    curl_setopt( $ch, CURLOPT_REFERER, 'https://www.wykop.pl/zaloguj/' );
    curl_setopt( $ch, CURLOPT_USERAGENT, $useragent );
    curl_setopt( $ch, CURLOPT_COOKIEJAR,  'cookie.txt' );
    curl_setopt( $ch, CURLOPT_COOKIEFILE, 'cookie.txt' );
    $result = curl_exec( $ch );
    curl_close( $ch );

    switch ($operation) {
        case 'notifs':
            if (stripos($result, "newregister")) {
                wykopnotifs('login', $username, $password);
            } else {
                return substr_count($result, "type-light-warning");
            }
        case 'token':
            $matches = [];
            preg_match("/name=\"__token\" value=\"(.+)?\"/i", $result, $matches);
            return $matches[1][0];
    }

    return $result;
}

//echo wykopnotifs('notifs', '**login**', '**password**');