<?php

if (!defined('APP_PATH_LIB')) define('APP_PATH_LIB', dirname(__FILE__));

class Lib {


	public static function loadClass($clsName) {
		return self::_loadClass($clsName, $required = true);
	}


	public static function tryLoadClass($clsName) {
		return self::_loadClass($clsName, $required = false);
	}


	/**
	 * load Class.
	 *
	 * @example Core_Database_Mysql - check Core/Database/Mysql.php or Core_Database_Mysql.php file
	 */
	public static function _loadClass($clsName, $required = true) {
		if (class_exists($clsName)) return true;
		$path = APP_PATH_LIB . '/' . implode('/', explode('_', $clsName)) . '.php';
		if (file_exists($path)) {
			require_once $path;
		} else {
			$path = APP_PATH_LIB . "/{$clsName}.php";
			if (file_exists($path)) {
				require_once $path;
			}
		}
		if (class_exists($clsName)) {
			return true;
		} else {
			if ($required) {
				die("Cant load class {$clsName}");
			}
			return false;
		}
	}

	public static function loadXslFunction($funcName) {
		return self::_loadXslFunction($funcName, $required = true);
	}


	public static function tryLoadXslFunction($funcName) {
		return self::_loadXslFunction($funcName, $required = false);
	}


	/**
	 * load function.
	 *
	 * @example testFetchWfs -> SE/se-lib/xsl-functions/testFetchWfs.php // function testFetchWfs() {}
	 * @example test_fetchWfs -> SE/se-lib/xsl-functions/test/fetchWfs.php // function test_fetchWfs() {}
	 */
	public static function _loadXslFunction($funcName, $required = true) {
		DBG::log("_loadXslFunction({$funcName})...");
		if (function_exists($funcName)) return true;
		$path = APP_PATH_LIB . '/xsl-functions/' . implode('/', explode('_', $funcName)) . '.php';
		DBG::log("DBG _loadXslFunction: {$path}");
		if (file_exists($path)) {
			require_once $path;
		} else {
			$path = APP_PATH_LIB . "/xsl-functions/{$funcName}.php";
			DBG::log("DBG _loadXslFunction: {$path}");
			if (file_exists($path)) {
				require_once $path;
			}
		}
		if (function_exists($funcName)) {
			return true;
		} else {
			if ($required) {
				die("Cant load xsl function {$funcName}");
			}
			return false;
		}
	}

}