<?php
set_time_limit(0);
error_reporting(E_ALL);

define('PATH' , dirname(__FILE__) . DIRECTORY_SEPARATOR);

require_once 'simple_html_dom.php';

$engine = new Tiktok();
$engine->run();

class Tiktok {

    public $token = '';
    public $cookies = '';
    public $useragent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.88 Safari/537.36';
    public $lang = 'ru';

    public $usernames = [];
    public $tags = [];

    public function __construct()
    {
        $this->cookies = PATH . 'cookies.txt';
        file_put_contents($this->cookies, '');
    }

    public function run()
    {
        $this->enter();
    }

    public function enter() {
        // open main tiktok page
        $this->curl('https://www.tiktok.com/ru');

        //open tranding
        $this->curl('https://www.tiktok.com/trending/?lang=' . $this->lang);

        //open discover
        $response = $this->curl('https://www.tiktok.com/discover?lang=' . $this->lang);

        $this->parse_usernames($response['content']);
        $this->parse_tags($response['content']);
//        print_r($this->usernames);
//        print_r($this->tags);

        $this->parse_tags_from_usernames();

    }

    public function parse_tags_from_usernames()
    {
        if (count($this->usernames) > 0) {
            foreach ($this->usernames as $username) {
                $response = $this->curl('https://www.tiktok.com/'.$username.'?lang=' . $this->lang);

                echo $response['content'];

                die();
            }
        }
    }

    public function parse_tags($html)
    {
        $dom = str_get_html($html);
        foreach($dom->find('._card_header_title') as $el)
        {
            $item = $el->innertext;
            if (substr($item, 0, 1) == '#') {
                $this->add_tag($item);
            }
        }
    }

    public function parse_usernames($html)
    {
        $dom = str_get_html($html);
        foreach($dom->find('a') as $a)
        {
            if (mb_strlen($a->href) > 0) {
                $tmp = explode('/', $a->href);
                if (count($tmp ) > 0) {
                    foreach ($tmp as $item) {
                        if (substr($item, 0, 1) == '@') {
                            $this->add_username($item);
                            break;
                        }
                    }
                }
            }
        }
    }

    public function add_username($username)
    {
        $username = trim($username);
        if (!in_array($username, $this->usernames)) {
            $this->usernames[] = $username;
        }
    }
    public function add_tag($tag)
    {
        $tag = trim($tag);
        if (!in_array($tag, $this->tags)) {
            $this->tags[] = $tag;
        }
    }

    public function curl($url)
    {
        $options = array(
            CURLOPT_RETURNTRANSFER  => true,     // return web page
            CURLOPT_HEADER          => false,    // don't return headers
            CURLOPT_FOLLOWLOCATION  => true,     // follow redirects
            CURLOPT_ENCODING        => "",       // handle all encodings
            CURLOPT_USERAGENT       => $this->useragent, // who am i
            CURLOPT_AUTOREFERER     => true,     // set referer on redirect
            CURLOPT_CONNECTTIMEOUT  => 30,      // timeout on connect
            CURLOPT_TIMEOUT         => 30,      // timeout on response
            CURLOPT_MAXREDIRS       => 10,       // stop after 10 redirects
            CURLOPT_SSL_VERIFYPEER  => false,    // Disabled SSL Cert checks
            CURLOPT_COOKIEFILE      => $this->cookies,
            CURLOPT_COOKIEJAR       => $this->cookies,
            CURLOPT_HTTPHEADER     => [
//                ':authority: www.tiktok.com',
//                ':method: GET',
//                ':path: /ru',
//                ':scheme: https',
                'accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
                'accept-encoding: gzip, deflate, br',
                'accept-language: ru-RU,ru;q=0.9,en-US;q=0.8,en;q=0.7,de;q=0.6',
                'cache-control: max-age=0',
//                'sec-fetch-mode: navigate',
//                'sec-fetch-site: same-origin',
//                'sec-fetch-user: ?1',
//                'upgrade-insecure-requests: 1',
            ]
        );

        $ch      = curl_init( $url );
        curl_setopt_array( $ch, $options );
        $content = curl_exec( $ch );
        $err     = curl_errno( $ch );
        $errmsg  = curl_error( $ch );
        $header  = curl_getinfo( $ch );
        curl_close( $ch );

        $header['errno']   = $err;
        $header['errmsg']  = $errmsg;
        $header['content'] = $content;

        return $header;
    }

}