path: root/modules-available/baseconfig/api.inc.php

<?php

$ip = $_SERVER['REMOTE_ADDR'];
if (substr($ip, 0, 7) === '::ffff:') {
	$ip = substr($ip, 7);
}

$uuid = Request::any('uuid', false, 'string');
if ($uuid !== false && strlen($uuid) !== 36) {
	$uuid = false;
}

class ConfigHolder
{
	private static $config = [];

	private static $context = '';

	private static $postHooks = [];

	public static function setContext($name)
	{
		self::$context = $name;
	}

	public static function addArray($array, $prio = 0)
	{
		foreach ($array as $key => $value) {
			self::add($key, $value, $prio);
		}
	}

	public static function add($key, $value, $prio = 0)
	{
		if (!isset(self::$config[$key])) {
			self::$config[$key] = [];
		}
		$new = [
			'prio' => $prio,
			'value' => $value,
			'context' => self::$context,
		];
		if (empty(self::$config[$key]) || self::$config[$key][0]['prio'] > $prio) {
			// Existing is higher, append new one
			array_push(self::$config[$key], $new);
		} else {
			// New one has highest prio or matches existing, put in front
			array_unshift(self::$config[$key], $new);
		}
	}

	public static function get($key)
	{
		if (!isset(self::$config[$key]))
			return false;
		return self::$config[$key][0]['value'];
	}

	/**
	 * @param callable $func
	 */
	public static function addPostHook($func)
	{
		self::$postHooks[] = array('context' => self::$context, 'function' => $func);
	}

	public static function applyPostHooks()
	{
		foreach (self::$postHooks as $hook) {
			self::$context = $hook['context'] . ':post';
			$hook['function']();
		}
		self::$postHooks = [];
	}

	public static function getConfig()
	{
		self::applyPostHooks();
		$ret = [];
		foreach (self::$config as $key => $list) {
			if ($list[0]['value'] === false)
				continue;
			$ret[$key] = $list[0]['value'];
		}
		return $ret;
	}

	public static function outputConfig()
	{
		self::applyPostHooks();
		foreach (self::$config as $key => $list) {
			echo str_pad('# ' . $key . ' ', 35, '#', STR_PAD_BOTH), "\n";
			foreach ($list as $pos => $item) {
				if ($pos != 0 || $item['value'] === false) {
					echo '# (', $item['context'], ':', $item['prio'], ')';
					if ($pos == 0) {
						echo " <disabled this setting>\n";
					} else {
						echo " <overridden>\n";
					}
				} else {
					echo $key, "='", escape($item['value']), "'\n";
					echo '# (', $item['context'], ':', $item['prio'], ") <active>\n";
				}
			}
		}
	}

}

/**
 * Escape given string so it is a valid string in sh that can be surrounded
 * by single quotes ('). This basically turns _'_ into _'"'"'_
 *
 * @param string $string input
 * @return string escaped sh string
 */
function escape($string)
{
	return str_replace("'", "'\"'\"'", $string);
}

/*
 * We gather all config variables here. First, let other modules generate
 * their desired config vars. Afterwards, add the global config vars from
 * db. If a variable is already set, it will not be overridden by the
 * global setting.
 */

function handleModule($name, $ip, $uuid) // Pass ip and uuid instead of global to make them read only
{
	// Module has getconfig hook
	$file = 'modules/' . $name . '/baseconfig/getconfig.inc.php';
	if (!is_file($file))
		return;
	// Properly registered and can be activated
	$mod = Module::get($name);
	if ($mod === false)
		return;
	if (!$mod->activate(1, false))
		return;
	// Process dependencies first
	foreach ($mod->getDependencies() as $dep) {
		handleModule($dep, $ip, $uuid);
	}
	ConfigHolder::setContext($name);
	(function($file, $ip, $uuid) {
		include_once($file);
	})($file, $ip, $uuid);
}

// Handle any hooks by other modules first
// other modules should generally only populate $configVars
foreach (glob('modules/*/baseconfig/getconfig.inc.php') as $file) {
	preg_match('#^modules/([^/]+)/#', $file, $out);
	ConfigHolder::setContext($out[1]);
	handleModule($out[1], $ip, $uuid);
}

// Rest is handled by module
$defaults = BaseConfigUtil::getVariables();

// Dump global config from DB
ConfigHolder::setContext('<global>');
$res = Database::simpleQuery('SELECT setting, value FROM setting_global');
while ($row = $res->fetch(PDO::FETCH_ASSOC)) {
	if (!isset($defaults[$row['setting']]))
		continue; // Setting is not defined in any <module>/baseconfig/settings.json
	ConfigHolder::add($row['setting'], $row['value'], -1);
}

// Fallback to default values from json files
ConfigHolder::setContext('<default>');
foreach ($defaults as $setting => $value) {
	ConfigHolder::add($setting, $value['defaultvalue'], -1000);
}

// All done, now output
ConfigHolder::add('SLX_NOW', time(), PHP_INT_MAX);
ConfigHolder::outputConfig();

// For quick testing or custom extensions: Include external file that should do nothing
// more than outputting more key-value-pairs. It's expected in the webroot of slxadmin
if (file_exists('client_config_additional.php')) @include('client_config_additional.php');