index.php

<?php
/**
 * Index loader
 *
 * @package Cotonti
 * @copyright (c) Cotonti Team
 * @license https://github.com/Cotonti/Cotonti/blob/master/License.txt
 */

if (php_sapi_name() == 'cli-server') {
	// Embedded PHP webserver routing
	$tmp = explode('?', $_SERVER['REQUEST_URI']);
	$REQUEST_FILENAME = mb_substr($tmp[0], 1);
	unset($tmp);
	if (file_exists($REQUEST_FILENAME) && !preg_match('#\.php$#', $REQUEST_FILENAME)) {
		// Transfer static file if exists
		return false;
	}
	// Language selector
	$langs = array_map(
        function ($dir) { return str_replace("lang/", "", $dir); },
		glob('lang/??', GLOB_ONLYDIR)
	);
	if (preg_match('#^(' . join('|', $langs) . ')/(.*)$#', $REQUEST_FILENAME, $mt)) {
		$REQUEST_FILENAME = $mt[2];
		$_GET['l'] = $mt[1];
	}
	// Sitemap shortcut
	if ($REQUEST_FILENAME === 'sitemap.xml') {
		$_GET['r'] = 'sitemap';
	}
	// Admin area and message are special scripts
	if (preg_match('#^admin/([a-z0-9]+)#', $REQUEST_FILENAME, $mt)) {
		$_GET['m'] = $mt[1];
		include 'admin.php';
		exit;
	}
	if (preg_match('#^(admin|login|message)(/|$)#', $REQUEST_FILENAME, $mt)) {
		include $mt[1].'.php';
		exit;
	}
	// PHP files have priority
	if (preg_match('#\.php$#', $REQUEST_FILENAME) && $REQUEST_FILENAME !== 'index.php') {
		include $REQUEST_FILENAME;
		exit;
	}
	// All the rest goes through standard rewrite gateway
	if ($REQUEST_FILENAME !== 'index.php') {
		$_GET['rwr'] = $REQUEST_FILENAME;
	}
	unset($REQUEST_FILENAME, $langs, $mt);
}

// Redirect to install if config is missing
if (!file_exists('./datas/config.php')) {
    if (file_exists('install.php')) {
        header('Location: install.php');
        exit;
    }

    $message_body = '<p><em>'.@date('Y-m-d H:i').'</em></p>';
    $message_body .= "<p>File 'install.php' not found</p>";
    echo $message_body;
    http_response_code(500);
	exit (1);
}

// Let the include files know that we are Cotonti
const COT_CODE = true;

// Load vital core configuration from file
require_once './datas/config.php';

// If it is a new install, redirect
if (isset($cfg['new_install']) && $cfg['new_install']) {
	header('Location: install.php');
	exit;
}

// Load the Core API
require_once $cfg['system_dir'] . '/functions.php';

// Bootstrap
require_once $cfg['system_dir'] . '/common.php';

$ext = isset($_GET['e']) ? cot_import('e', 'G', 'ALP') : false;
$ajax = cot_import('r', 'G', 'ALP');
$popup = cot_import('o', 'G', 'ALP');
if (!$ext) {
	// Support for ajax and popup hooked plugins
	$ext = $ajax ? $ajax : ($popup ? $popup : $ext);
}
unset ($ajax, $popup);

// Detect selected extension
if ($ext === false) {
	// Default environment for index module
	define('COT_MODULE', true);
	$env['type'] = 'module';
	$env['ext'] = 'index';
} else {
	$found = false;
	if (preg_match('`^\w+$`', $ext)) {
		$module_found = false;
		$plugin_found = false;
		if (file_exists($cfg['modules_dir'] . '/' . $ext) && isset($cot_modules[$ext])) {
			$module_found = true;
			$found = true;
		}
		if (file_exists($cfg['plugins_dir'] . '/' . $ext)) {
			$plugin_found = true;
			$found = true;
		}
		if ($module_found && $plugin_found) {
			// Need to query the db to check which one is installed
			$res = $db->query("SELECT ct_plug FROM $db_core WHERE ct_code = ? LIMIT 1", $ext);
			if ($res->rowCount() == 1) {
				if ((int) $res->fetchColumn()) {
					$module_found = false;
				} else {
					$plugin_found = false;
				}
			} else {
				$found = false;
			}
		}
		if ($module_found) {
			$env['type'] = 'module';
			define('COT_MODULE', true);
		} elseif ($plugin_found) {
			$env['type'] = 'plug';
			$env['location'] = 'plugins';
			define('COT_PLUG', true);
		}
	}
	if ($found) {
		$env['ext'] = $ext;
	} else {
		// Error page
		cot_die_message(404);
		exit;
	}
}
unset($ext);

// Load the requested extension
if (Cot::$env['type'] == 'plug') {
	require_once Cot::$cfg['system_dir'] . '/plugin.php';
} else {
	require_once Cot::$cfg['modules_dir'] . '/' . Cot::$env['ext'] . '/' . Cot::$env['ext'] . '.php';
}