<?php
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/**
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* PHPIDS
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*
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* Requirements: PHP5, SimpleXML
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*
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* Copyright (c) 2008 PHPIDS group (https://phpids.org)
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*
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* PHPIDS is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, version 3 of the License, or
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* (at your option) any later version.
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*
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* PHPIDS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with PHPIDS. If not, see <http://www.gnu.org/licenses/>.
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*
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* PHP version 5.1.6+
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*
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* @category Security
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* @package PHPIDS
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* @author Mario Heiderich <mario.heiderich@gmail.com>
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* @author Christian Matthies <ch0012@gmail.com>
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* @author Lars Strojny <lars@strojny.net>
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* @license http://www.gnu.org/licenses/lgpl.html LGPL
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* @link http://php-ids.org/
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*/
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namespace IDS;
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/**
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* Framework initiation
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*
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* This class is used for the purpose to initiate the framework and inhabits
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* functionality to parse the needed configuration file.
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*
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* @category Security
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* @package PHPIDS
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* @author Christian Matthies <ch0012@gmail.com>
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* @author Mario Heiderich <mario.heiderich@gmail.com>
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* @author Lars Strojny <lars@strojny.net>
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* @copyright 2007-2009 The PHPIDS Groupup
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* @license http://www.gnu.org/licenses/lgpl.html LGPL
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* @link http://php-ids.org/
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* @since Version 0.4
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*/
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class Init
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{
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/**
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* Holds config settings
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*
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* @var array
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*/
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public $config = array();
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/**
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* Instance of this class depending on the supplied config file
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*
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* @var Init[]|array
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* @static
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*/
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private static $instances = array();
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/**
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* Constructor
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*
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* Includes needed classes and parses the configuration file
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*
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* @param array $config
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*
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* @return \IDS\Init $this
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*/
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public function __construct(array $config = array())
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{
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$this->config = $config;
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}
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/**
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* Returns an instance of this class. Also a PHP version check
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* is being performed to avoid compatibility problems with PHP < 5.1.6
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*
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* @param string|null $configPath the path to the config file
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*
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* @throws \InvalidArgumentException
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* @return self
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*/
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public static function init($configPath = null)
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{
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if (!$configPath) {
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return new self();
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}
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if (!isset(self::$instances[$configPath])) {
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if (!file_exists($configPath) || !is_readable($configPath)) {
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throw new \InvalidArgumentException("Invalid config path '$configPath'");
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}
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self::$instances[$configPath] = new static(parse_ini_file($configPath, true));
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}
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return self::$instances[$configPath];
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}
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/**
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* This method checks if a base path is given and usage is set to true.
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* If all that tests succeed the base path will be returned as a string -
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* else null will be returned.
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*
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* @return string|null the base path or null
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*/
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public function getBasePath()
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{
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return (!empty($this->config['General']['base_path'])
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&& !empty($this->config['General']['use_base_path']))
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? $this->config['General']['base_path'] : null;
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}
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/**
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* Merges new settings into the exsiting ones or overwrites them
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*
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* @param array $config the config array
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* @param boolean $overwrite config overwrite flag
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*
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* @return void
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*/
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public function setConfig(array $config, $overwrite = false)
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{
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if ($overwrite) {
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$this->config = $this->mergeConfig($this->config, $config);
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} else {
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$this->config = $this->mergeConfig($config, $this->config);
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}
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}
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/**
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* Merge config hashes recursivly
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*
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* The algorithm merges configuration arrays recursively. If an element is
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* an array in both, the values will be appended. If it is a scalar in both,
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* the value will be replaced.
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*
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* @param array $current The legacy hash
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* @param array $successor The hash which values count more when in doubt
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* @return array Merged hash
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*/
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protected function mergeConfig($current, $successor)
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{
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if (is_array($current) and is_array($successor)) {
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foreach ($successor as $key => $value) {
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if (isset($current[$key])
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and is_array($value)
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and is_array($current[$key])) {
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$current[$key] = $this->mergeConfig($current[$key], $value);
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} else {
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$current[$key] = $successor[$key];
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}
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}
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}
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return $current;
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}
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/**
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* Returns the config array
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*
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* @return array the config array
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*/
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public function getConfig()
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{
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return $this->config;
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}
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}
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