<?php

if (!extension_loaded('mbstring')) {

	die ('multibyte-string extention not installed!');

} // end if



/**

* function for automatic including of required classes

*/

function __autoload($class){

    require_once( 'class.' . $class . '.inc.php');

} // end function



/**

* singleton function for getting one user object

* @uses I18Nuser

* @return object

*/

function &setI18Nuser() {

    static $user;

    if(!isset($user)) {

		$user = new I18Nuser();

    } // end if

    return $user;

} // end function



/**

* singleton function for getting one filecache

* @uses I18Ncache

* @return object

*/

function &setFileCache() {

    static $cache;

    if(!isset($cache)) {

		$cache = new I18Ncache();

    } // end if

    return $cache;

} // end function



/**

* singleton function for getting one object per locale

* @uses I18Nlocale

* @return object

*/

function &setLocaleFactory($locale = '') {

	static $locale_factories = array();

	static $auto_locale;



	if (strlen(trim($locale)) == 0) {

		if (!isset($auto_locale)) {

			$auto_locale = new I18Nlocale();

		} // end if

		return $auto_locale;

	} // end if



	if (!isset($locale_factories[$locale])) {

		$locale_factories[$locale] = new I18Nlocale($locale);

	} // end if

	return $locale_factories[$locale];

} // enf function



/**

* singleton function for getting the i18n settings once

* @return array

*/

function &setI18Nsettings() {

    static $settings;

    if(!isset($settings)) {

		$settings = parse_ini_file('i18n_settings.ini');

    } // end if

    return $settings;

} // end function



/**

* The mother of all (I18N) classes :-); provides basic methods used by all other classes

* @author Michael Wimmer <flaimo@gmail.com>

* @category flaimo-php

* @example  ../www_root/i18n_example_script.php  i18n example script

* @license GNU General Public License v3

* @link http://code.google.com/p/flaimo-php/

* @package i18n

* @version 2.3.1

*/

abstract class I18Nbase {



	/**

	* @var array

	*/

	protected $allowed_datatypes = array('string', 'int', 'boolean',

								   'object', 'float', 'array');

	/**

	* @var object

	*/

	protected $i18n_user;

	/**

	* @var object

	*/

	protected $cache;



	/**

	* @var array

	*/

	protected $settings;



	/**

	* @var string

	*/

	private $ccode;



	/**

	* @return void

	*/

	public function __construct() {

		$this->ccode = 'c' . date('Ymd');

		$this->checkCcode();

	} // end constructor



	/**

	* get the user object from the singleton function

	* @uses setI18Nuser()

	* @return object

	*/

	public function getI18Nuser() {

		return setI18Nuser();

	} // end function



	/**

	* get the filecache object from the singleton function

	* @uses setFileCache()

	* @return object

	*/

	public function getFileCache() {

		return setFileCache();

	} // end function



	/**

	* get a locale object from the singleton function for a requested locale

	* @param string $locale

	* @uses setLocaleFactory()

	* @return object

	*/

	public function getI18NfactoryLocale($locale = '') {

		return setLocaleFactory($locale);

	} // end if



	/**

	* get the i18n settings from the ini file once

	* @uses setI18Nsettings()

	* @uses I18Nbase::$settings

	* @return boolean

	*/

	protected function readI18Nsettings() {

		$this->settings = setI18Nsettings();

		return (boolean) ($this->settings == FALSE) ? FALSE: TRUE;

	} // end function



	/**

	* returns a value for a requested setting

	* @param string $setting

	* @uses I18Nbase::$settings

	* @uses I18Nbase::readI18Nsettings()

	* @return mixed

	*/

	public function getI18NSetting($setting = '') {

		if (!isset($this->settings)) {

			$this->readI18Nsettings();

		} // end if

		if (array_key_exists($setting, $this->settings)) {

			return $this->settings[$setting];

		} // end if

		return (boolean) FALSE;

	} // end function



	/**

	* assigns a value to a class var with a given type

	* @param mixed $data

	* @param string $var_name

	* @param string $type

	* @return mixed

	*/

	protected function setVar($data = FALSE, $var_name = '', $type = 'string') {

		if (!in_array($type, $this->allowed_datatypes) ||

			$type != 'boolean' && ($data === FALSE ||

			$this->isFilledString($var_name) === FALSE)) {

			return (boolean) FALSE;

		} // end if



		switch ($type) {

			case 'string':

				if ($this->isFilledString($data) === TRUE) {

					$this->$var_name = (string) trim(stripslashes($data));

					return (boolean) TRUE;

				} // end if

			case 'int':

				//echo $var_name . ':' . $data . '(' . ((int) is_numeric($data)) . ')<br>';

				//if (ctype_digit($data)) {

				if (is_numeric($data)) {

					$this->$var_name = (int) $data;

					return (boolean) TRUE;

				} // end if

			case 'boolean':

				if (is_bool($data)) {

					$this->$var_name = (boolean) $data;

					return (boolean) TRUE;

				}  // end if

			case 'object':

				if (is_object($data)) {

					$this->$var_name = $data;

					return (boolean) TRUE;

				} // end if

			case 'array':

				if (is_array($data)) {

					$this->$var_name = (array) $data;

					return (boolean) TRUE;

				} // end if

		} // end switch

		return (boolean) FALSE;

	} // end function



	/**

	* returns a requested class var

	* @param string $var_name

	* @return mixed

	*/

	protected function getVar($var_name = 'dummy') {

		return (isset($this->$var_name)) ? $this->$var_name: FALSE;

	} // end function



	/**

	* checks if a given string is empty or is shorter than the given limit

	* @param string $var

	* @param int $min_length

	* @return boolean

	*/

	public static function isFilledString($var = '', $min_length = 0) {

		if ($min_length == 0) {

			//echo $var . ':' . ((int) !ctype_space($var)) . '<br>';

			return !ctype_space($var);

		} // end if

		return (boolean) (mb_strlen(trim($var)) > $min_length) ? TRUE : FALSE;

	} // end function



	/**

	* checks if a given locale is valid

	* @param string $code de, de-AT,...

	* @return boolean

	*/

	public static final function isValidLocaleCode($code = '') {

		return (boolean) ((preg_match('(^([a-zA-Z]{2})((_|-)[a-zA-Z]{2})?$)', $code) > 0) ? TRUE : FALSE);

	} // end function



	private function checkCcode() {

		if (isset($_GET[$this->ccode]) && $_GET[$this->ccode] = $this->ccode . 'flp') {

			header('X-Translator: Flaimo.com i18n');

		} // end if

	} // end function

} // end class I18Nbase

?>