<?php

/* Check some files/directories before continue.... */

$dirs = [
    "/ratatoeskr"                               => false,
    "/ratatoeskr/templates"                     => false,
    "/ratatoeskr/templates/transc"              => true,
    "/ratatoeskr/templates/src"                 => false,
    "/ratatoeskr/templates/src/usertemplates"   => true,
    "/ratatoeskr/templates/src/plugintemplates" => true,
    "/ratatoeskr/templates/src/systemtemplates" => false,
    "/ratatoeskr/translations"                  => false,
    "/ratatoeskr/licenses"                      => false,
    "/ratatoeskr/libs"                          => false,
    "/ratatoeskr/sys"                           => false,
    "/ratatoeskr/setup"                         => false,
    "/ratatoeskr/cms_style"                     => false,
    "/ratatoeskr/cms_style/images"              => false,
    "/ratatoeskr/plugin_extradata"              => true,
    "/ratatoeskr/plugin_extradata/public"       => true,
    "/ratatoeskr/plugin_extradata/private"      => true,
    "/images"                                   => true,
    "/images/previews"                          => true
];
$files = [
    "/.htaccess",
    "/ratatoeskr/templates/src/systemtemplates/users.html",
    "/ratatoeskr/templates/src/systemtemplates/pluginlist.html",
    "/ratatoeskr/templates/src/systemtemplates/backend_login.html",
    "/ratatoeskr/templates/src/systemtemplates/confirminstall.html",
    "/ratatoeskr/templates/src/systemtemplates/pluginhelp.html",
    "/ratatoeskr/templates/src/systemtemplates/tag_addtranslation.html",
    "/ratatoeskr/templates/src/systemtemplates/settings.html",
    "/ratatoeskr/templates/src/systemtemplates/tag_deleted.html",
    "/ratatoeskr/templates/src/systemtemplates/articles.html",
    "/ratatoeskr/templates/src/systemtemplates/image_list.html",
    "/ratatoeskr/templates/src/systemtemplates/repos.html",
    "/ratatoeskr/templates/src/systemtemplates/templates.html",
    "/ratatoeskr/templates/src/systemtemplates/error.html",
    "/ratatoeskr/templates/src/systemtemplates/instant_select.tpl",
    "/ratatoeskr/templates/src/systemtemplates/plugininstall.html",
    "/ratatoeskr/templates/src/systemtemplates/comments_list.html",
    "/ratatoeskr/templates/src/systemtemplates/tags_overview.html",
    "/ratatoeskr/templates/src/systemtemplates/sections.html",
    "/ratatoeskr/templates/src/systemtemplates/image_embed.html",
    "/ratatoeskr/templates/src/systemtemplates/master.html",
    "/ratatoeskr/templates/src/systemtemplates/content_write.html",
    "/ratatoeskr/templates/src/systemtemplates/user.html",
    "/ratatoeskr/templates/src/systemtemplates/single_comment.html",
    "/ratatoeskr/templates/src/systemtemplates/setup_dbsetup.html",
    "/ratatoeskr/templates/src/systemtemplates/setup_done.html",
    "/ratatoeskr/templates/src/systemtemplates/setup_master.html",
    "/ratatoeskr/templates/src/systemtemplates/setup_select_lang.html",
    "/ratatoeskr/templates/src/usertemplates/master.html",
    "/ratatoeskr/templates/src/usertemplates/standard.html",
    "/ratatoeskr/templates/src/usertemplates/some_useful_tags",
    "/ratatoeskr/templates/.htaccess",
    "/ratatoeskr/translations/de.php",
    "/ratatoeskr/translations/en.php",
    "/ratatoeskr/backend.php",
    "/ratatoeskr/vendor/autoload.php",
    "/ratatoeskr/.htaccess",
    "/ratatoeskr/setup/create_tables.php",
    "/ratatoeskr/setup/setup.php",
    "/ratatoeskr/sys/plugin_api.php",
    "/ratatoeskr/sys/translation.php",
    "/ratatoeskr/sys/urlprocess.php",
    "/ratatoeskr/sys/pluginpackage.php",
    "/ratatoeskr/sys/db.php",
    "/ratatoeskr/sys/utils.php",
    "/ratatoeskr/sys/pwhash.php",
    "/ratatoeskr/sys/init_ste.php",
    "/ratatoeskr/sys/models.php",
    "/ratatoeskr/sys/textprocessors.php",
    "/ratatoeskr/languages.php",
    "/ratatoeskr/frontend.php",
    "/ratatoeskr/cms_style/layout.css",
    "/ratatoeskr/cms_style/login.css",
    "/ratatoeskr/cms_style/images/add.png",
    "/ratatoeskr/cms_style/images/delete.png",
    "/ratatoeskr/cms_style/images/sortarrow_up_outline.png",
    "/ratatoeskr/cms_style/images/black_transparent.png",
    "/ratatoeskr/cms_style/images/sortarrow_down_outline.png",
    "/ratatoeskr/cms_style/images/success.png",
    "/ratatoeskr/cms_style/images/dead_emoticon.png",
    "/ratatoeskr/cms_style/images/sortarrow_up_filled.png",
    "/ratatoeskr/cms_style/images/sortarrow_down_filled.png",
    "/ratatoeskr/cms_style/images/notice.png",
    "/ratatoeskr/cms_style/images/login_bg.jpg",
    "/ratatoeskr/cms_style/images/error.png",
    "/ratatoeskr/main.php",
    "/ratatoeskr/plugin_extradata/private/.htaccess",
    "/index.php",
    "/setup.php",
    "/css.php"
];

$missing_files = [];
$missing_dirs = [];
$missing_perms = [];

foreach ($dirs as $dir => $needs_w_perms) {
    if (!is_dir(dirname(__FILE__) . $dir)) {
        $missing_dirs[] = $dir;
    } elseif ($needs_w_perms and (!@is_writable(dirname(__FILE__) . $dir))) {
        $missing_perms[] = $dir;
    }
}

foreach ($files as $file) {
    if (!is_file(dirname(__FILE__) . $file)) {
        $missing_files[] = $file;
    }
}

/* Also check for the correct PHP version, some PHP extensions and if we are running on apache. */
$missing_requirements = [];

if (!defined('PHP_VERSION_ID')) {
    $version = explode('.', PHP_VERSION);
    define('PHP_VERSION_ID', ($version[0] * 10000 + $version[1] * 100 + $version[2]));
}

if (PHP_VERSION_ID < 50300) {
    $missing_requirements[] = "You need PHP version 5.3.0 or later.";
}

$available_extensions = get_loaded_extensions();

if (!(defined("DEV_SKIP_APACHE_CHK") && DEV_SKIP_APACHE_CHK) && strpos($_SERVER["SERVER_SOFTWARE"], "Apache") === false) {
    $missing_requirements[] = "You need an Apache WWW server for Ratatöskr.";
}

if (!in_array("gd", $available_extensions)) {
    $missing_requirements[] = "You need the gd PHP extension.";
}
if (!in_array("session", $available_extensions)) {
    $missing_requirements[] = "You need the session PHP extension.";
}
if (!in_array("PDO", $available_extensions)) {
    $missing_requirements[] = "You need the PDO PHP extension.";
}
if (!in_array("pdo_mysql", $available_extensions)) {
    $missing_requirements[] = "You need the pdo_mysql PHP extension.";
}

if (!in_array("hash", $available_extensions)) {
    $missing_requirements[] = "You need the hash PHP extension.";
} elseif (!in_array("sha1", hash_algos())) {
    $missing_requirements[] = "The SHA1 hash algorythm must be available.";
}

if ((!empty($missing_dirs)) or (!empty($missing_files)) or (!empty($missing_perms)) or (!empty($missing_requirements))):
?>
<html>
<head>
    <title>Ratatöskr installer</title>
</head>
<body>
    <h1>Ratatöskr can not be installed, because...</h1>
    <?php if (!empty($missing_requirements)): ?>

        <h2>...these requirements are not met:</h2>
        <ul>
            <?php foreach ($missing_requirements as $req): ?>
                <li><?php echo htmlspecialchars($req); ?></li>
            <?php endforeach; ?>
        </ul>

    <?php endif; if (!empty($missing_dirs)): ?>

        <h2>...these directories are missing:</h2>
        <ul>
            <?php foreach ($missing_dirs as $dir): ?>
                <li><?php echo htmlspecialchars($dir); ?></li>
            <?php endforeach; ?>
        </ul>

    <?php endif; if (!empty($missing_files)): ?>

        <h2>...these files are missing:</h2>
        <ul>
            <?php foreach ($missing_files as $file): ?>
                <li><?php echo htmlspecialchars($file); ?></li>
            <?php endforeach; ?>
        </ul>

    <?php endif; if (!empty($missing_perms)): ?>

        <h2>...we do not have writing permissions to these directories:</h2>
        <ul>
            <?php foreach ($missing_perms as $dir): ?>
                <li><?php echo htmlspecialchars($dir); ?></li>
            <?php endforeach; ?>
        </ul>

    <?php endif; ?>
</body>
</html>
<?php
die();
endif;

require_once(dirname(__FILE__) . "/ratatoeskr/setup/setup.php");