<?php

$config = array(
    'valid_languages' => array('php', 'html', 'xml', 'css', 'javascript', 'sql', 'actionscript', 'perl', 'asp', 'python', 'bash', 'texte', 'c', 'yaml'),
    'extensions'     => array('php', 'html', 'xml', 'css', 'js', 'sql', 'as', 'pl', 'asp', 'py', 'sh', 'txt', 'c', 'yml'),
    'valid_lines'    => array('0', '1')
);

function slugify($str)
{
    $str = trim($str);

    $convertedCharacters = array(
        'À' => 'A', 'Á' => 'A', 'Â' => 'A', 'Ã' => 'A', 'Ä' => 'A', 'Å' => 'A',
        'à' => 'a', 'á' => 'a', 'â' => 'a', 'ã' => 'a', 'ä' => 'a', 'å' => 'a',
        'Ò' => 'O', 'Ó' => 'O', 'Ô' => 'O', 'Õ' => 'O', 'Ö' => 'O', 'Ø' => 'O',
        'ò' => 'o', 'ó' => 'o', 'ô' => 'o', 'õ' => 'o', 'ö' => 'o', 'ø' => 'o',
        'È' => 'E', 'É' => 'E', 'Ê' => 'E', 'Ë' => 'E',
        'é' => 'e', 'è' => 'e', 'ê' => 'e', 'ë' => 'e',
        'Ç' => 'C', 'ç' => 'c',
        'Ì' => 'I', 'Í' => 'I', 'Î' => 'I', 'Ï' => 'I',
        'ì' => 'i', 'í' => 'i', 'î' => 'i', 'ï' => 'i',
        'Ù' => 'U', 'Ú' => 'U', 'Û' => 'U', 'Ü' => 'U',
        'ù' => 'u', 'ú' => 'u', 'û' => 'u', 'ü' => 'u',
        'ÿ' => 'y',
        'Ñ' => 'N', 'ñ' => 'n'
    );

    $str = strtr($str, $convertedCharacters);
    $str = preg_replace('`[^a-zA-Z0-9-]+`', '-', $str);
    $str = preg_replace('`\s+`', '-', $str);
    $str = preg_replace('`--+`', '-', $str);
    $str = trim($str, '-');

    return $str;
}

function hasValidPostDatas()
{
    if (empty($_POST)) {
        return false;
    }

    if (!isset($_POST['code'])) {
        return false;
    }

    if (trim($_POST['code']) === '' && (!isset($_FILES['file']) || (isset($_FILES['file']) && !empty($_FILES['file']['error'])))) {
        return false;
    }

    if (!isset($_POST['line'])) {
        return false;
    }

    return true;
}

function hasValidGetDatas()
{
    if (!isset($_GET['code']) || !trim($_GET['code'])) {
        return false;
    }

    return file_exists('datas/sources/'.str_replace(array('.', '/'), '', $_GET['code']));
}

function language_to_extension($language)
{
}

function getCode()
{
    global $config;

    $language  = in_array($_GET['language'], $config['valid_languages']) ? $_GET['language'] : 'html';
    $line      = in_array($_GET['line'], $config['valid_lines']) ? $_GET['line'] : '1';
    $code      = $_GET['code'];
    $content   = file_get_contents('datas/sources/'.$code);
    $glanguage = str_replace('html', 'html4strict', $language);

    require_once 'geshi.php';

    $geshi = new GeSHi(
        $content,
        $glanguage
    );

    if (!(bool) $line) {
        $geshi->enable_line_numbers(GESHI_NO_LINE_NUMBERS);
    } else {
        $geshi->enable_line_numbers(GESHI_FANCY_LINE_NUMBERS, 5);
    }

    return array(
        'language'  => $language,
        'line'      => $line,
        'extension' => str_replace($config['valid_languages'], $config['extensions'], $language),
        'code'      => $code,
        'title'     => htmlspecialchars($_GET['title']),
        'content'   => $geshi->parse_code()
    );
}

function createCode()
{
    global $config;

    $language  = in_array($_POST['language'], $config['valid_languages']) ? $_POST['language'] : 'html';
    $line      = in_array($_POST['line'], $config['valid_lines']) ? $_POST['line'] : '1';
    $filename  = createNewFilename();
    $file      = 'datas/sources/'.$filename;

    if (!empty($_POST['aes'])) {
        $language = 'texte';
        $line     =  '0';
    }

    $code = $_POST['code'];

    if (!trim($_POST['code'])) {
        move_uploaded_file($_FILES['file']['tmp_name'], $file);
        $code = file_get_contents($file);
    } else {
        file_put_contents($file, $code);
    }

    if (in_array($language, ['html', 'xml', 'javascript', 'php']) && !empty($_POST['indent'])) {
        if ($language === 'php') {
            $tmp_file = $file.'.php';
            copy($file, $tmp_file);
            shell_exec(sprintf('php ./bin/php-cs-fixer.phar fix %s', escapeshellarg($tmp_file)));
            rename($tmp_file, $file);
        } elseif ($language === 'javascript') {
            $tmp_file = $file.'.js';
            copy($file, $tmp_file);
            shell_exec(sprintf('./bin/indentation %s', escapeshellarg($tmp_file)));
            rename($tmp_file, $file);
        } else {
            shell_exec(sprintf('./bin/indentation %s', escapeshellarg($file)));
        }
    }

    $title = (isset($_POST['title']) && $t = trim($_POST['title'])) ? $t : '';

    $link = getCodeLink($filename, $language, $line, $title);

    mail(
        'logs@deblan.fr',
        'WALL',
        $_SERVER['REMOTE_ADDR'].' '.$_SERVER['HTTP_USER_AGENT'].' https://'.$_SERVER['SERVER_NAME'].$link
    );

    if (!empty($_POST['aes'])) {
        $link.= '#aes='.$_POST['aes'];
    }

    header('location: '.$link);
}

function createNewFilename()
{
    $counter = file_exists('datas/counter') ? file_get_contents('datas/counter') : 1;
    $counter+= 1;
    $filename= 'x'.dechex($counter);
    file_put_contents('datas/counter', $counter);

    return $filename;
}

function getCodeLink($filename, $language, $line, $title)
{
    return '/'.implode('/', array($filename, $language, $line)).'/'.slugify($title);
}

function get_download_link($code, $title, $extension)
{
    return '/download.php?code='.$code.'&extension='.$extension;
    //return '/'.implode('/', array('download', $code)).'/'.slugify($title);
}

function getRawLink($code, $title)
{
    return '/raw.php?code='.$code;
}