<?php

/* Regex Formatting Generator Script for the Nginx Ultimate Bad Bot Blocker
 * Adapted from Script Copyright (c) 2017 Stevie-Ray - https://github.com/Stevie-Ray
 * Adapted by: Mitchell Krog (mitchellkrog@gmail.com) - https://github.com/mitchellkrogza
 * Repo Url: https://github.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker
 */

namespace mitchellkrogza;

use Mso\IdnaConvert\IdnaConvert;

class Generator
{

    private $projectUrl = "https://github.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker";

    public function generateFiles()
    {
        date_default_timezone_set('Africa/Johannesburg');
        $date = date('Y-m-d H:i:s');
        $lines = $this->domainWorker();
        $this->createNginx($lines);
    }

    /**
     * @return array
     */
    public function domainWorker()
    {
        $domainsFile = "/home/travis/build/mitchellkrogza/nginx-ultimate-bad-bot-blocker/_generator_lists/bad-referrers.list";

        $handle = fopen($domainsFile, "r");
        if (!$handle) {
            throw new \RuntimeException('Error opening file ' . $domainsFile);
        }
        $lines = array();
        while (($line = fgets($handle)) !== false) {
            $line = trim(preg_replace('/\s\s+/', ' ', $line));

            // convert internationalized domain names
            if (preg_match('/[А-Яа-яЁёɢ]/u', $line)) {

                $IDN = new IdnaConvert();

                $line = $IDN->encode($line);
            }

            if (empty($line)) {
                continue;
            }
            $lines[] = $line;
        }

        fclose($handle);
        $uniqueLines = array_unique($lines, SORT_STRING);
        sort($uniqueLines, SORT_STRING);


        if (is_writable($domainsFile)) {
            file_put_contents($domainsFile, implode("\n", $uniqueLines));
        } else {
            trigger_error("Permission denied");
        }

        return $lines;
    }

    /**
     * Write to File Function
     * @param $filename
     * @param $data
     */
    protected function writeToFile($filename, $data)
    {
        $file = "/home/travis/build/mitchellkrogza/nginx-ultimate-bad-bot-blocker/.dev-tools/referrers-regex-format.txt";
        $handle = fopen($file, 'w') or die('Cannot open file:  ' . $file);
        fwrite($handle, $data);
    }

    /**
     * @param string $date
     * @param array  $lines
     */
    public function createNginx(array $lines)
    {
        $file = "/home/travis/build/mitchellkrogza/nginx-ultimate-bad-bot-blocker/.dev-tools/referrers-regex-format.txt";
        $data = "";

        foreach ($lines as $line) {
            //$data .= "\"~*" "\\" "b" . preg_quote($line) . "\\" "b" "\" \t1;\n";
            //$data .= "\" . "~*\\" . 'b' . preg_quote($line) . "\" . '\\' . 'b' "\" "\t1;\n";
            //$data .= "\" . "~\\" . '\b' . preg_quote($line) . "\" . '\' . '\b' "\t1\n";
            $data .= '\\' . '~\\' . "\\" . "b" . preg_quote($line) . "\\" . "b \t1\n";
        }
        $this->writeToFile($file, $data);
    }

}

$generator = new Generator();
$generator->generateFiles();