<?php
/************************************************************************
 * MXChange v0.2.1                                    Start: 08/25/2003 *
 * ===============                              Last change: 11/29/2005 *
 *                                                                      *
 * -------------------------------------------------------------------- *
 * File              : language-functions.php                           *
 * -------------------------------------------------------------------- *
 * Short description : Language functions                               *
 * -------------------------------------------------------------------- *
 * Kurzbeschreibung  : Sprachfunktionen                                 *
 * -------------------------------------------------------------------- *
 * $Revision::                                                        $ *
 * $Date::                                                            $ *
 * $Tag:: 0.2.1-FINAL                                                 $ *
 * $Author::                                                          $ *
 * Needs to be in all Files and every File needs "svn propset           *
 * svn:keywords Date Revision" (autoprobset!) at least!!!!!!            *
 * -------------------------------------------------------------------- *
 * Copyright (c) 2003 - 2009 by Roland Haeder                           *
 * For more information visit: http://www.mxchange.org                  *
 *                                                                      *
 * This program is free software; you can redistribute it and/or modify *
 * it under the terms of the GNU General Public License as published by *
 * the Free Software Foundation; either version 2 of the License, or    *
 * (at your option) any later version.                                  *
 *                                                                      *
 * This program is distributed in the hope that it will be useful,      *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of       *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
 * GNU General Public License for more details.                         *
 *                                                                      *
 * You should have received a copy of the GNU General Public License    *
 * along with this program; if not, write to the Free Software          *
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,               *
 * MA  02110-1301  USA                                                  *
 ************************************************************************/

// Some security stuff...
if (!defined('__SECURITY')) {
	die();
} // END - if

// "Getter" for language strings
// @TODO Rewrite all language constants to this function.
function getMessage ($messageId) {
	// Default is not found!
	$return = '!' . $messageId . '!';

	// Is the language string found?
	if (isMessageIdValid($messageId)) {
		// Language array element found in small_letters
		$return = $GLOBALS['messages'][$messageId];
	} else {
		// Missing language constant
		logDebugMessage(__FUNCTION__, __LINE__, sprintf("Missing message string %s detected.", $messageId));
	}

	// Return the string
	return $return;
}

// Init messages
function initMessages () {
	$GLOBALS['messages'] = array();
}

// Add message
function addMessages ($messages) {
	// Merge both
	$GLOBALS['messages'] = merge_array($GLOBALS['messages'], $messages);
}

// Checks wether given message id is valid
function isMessageIdValid ($messageId) {
	return (isset($GLOBALS['messages'][$messageId]));
}

// "Getter for current language
function getCurrentLanguage () {
	return $GLOBALS['language'];
}

// "Getter" for language
function getLanguage () {
	// Set default return value to default language from config
	$ret = getConfig('DEFAULT_LANG');

	// Init variable
	$lang = '';

	// Is the variable set
	if (isGetRequestElementSet('mx_lang')) {
		// Accept only first 2 chars
		$lang = substr(getRequestElement('mx_lang'), 0, 2);
	} elseif (isset($GLOBALS['language'])) {
		// Use cached
		$ret = getCurrentLanguage();
	} elseif (!empty($lang)) {
		// Check if main language file does exist
		if (isIncludeReadable('inc/language/' . $lang . '.php')) {
			// Okay found, so let's update cookies
			setLanguage($lang);
		} // END - if
	} elseif (isSessionVariableSet('mx_lang')) {
		// Return stored value from cookie
		$ret = getSession('mx_lang');

		// Fixes a warning before the session has the mx_lang constant
		if (empty($ret)) $ret = getConfig('DEFAULT_LANG');
	}

	// Cache entry
	$GLOBALS['language'] = $ret;

	// Return value
	return $ret;
}

// "Setter" for language
function setLanguage ($lang) {
	// Accept only first 2 chars!
	$lang = substr(SQL_ESCAPE(secureString($lang)), 0, 2);

	// Set cookie
	setSession('mx_lang', $lang);
}

// Checks wether a language file is there for optional extension
function isLanguageIncludeReadable ($ext_name = 'none') {
	// Do we have array element?
	if (!isset($GLOBALS['lang_inc'][$ext_name])) {
		// Generate filename
		if ($ext_name == 'none') {
			// Generic
			$languageInclude = sprintf("inc/language/%s.php", getLanguage());
		} else {
			// Extension's language file
			$languageInclude = sprintf("inc/language/%s_%s.php", $ext_name, getLanguage());
		}

		// Look for file if no extension name is provided
		$GLOBALS['lang_inc'][$ext_name] = isIncludeReadable($languageInclude);
		//* DEBUG: */ print __FUNCTION__.':'.$ext_name.'='.$languageInclude.'='.intval(isIncludeReadable($languageInclude)).'<br />';
	} // END - if

	// Return it
	return $GLOBALS['lang_inc'][$ext_name];
}

// Load the current language file or fixes it to 'de'
// If ext_name is 'none', load general language support, else load extension's
// language file. In installation phase load the install language file.
function loadLanguageFile ($ext_name = 'none') {
	// Try to get language from session
	$currLanguage = getLanguage();

	// Set default language if it is not (yet) set
	if (is_null($currLanguage)) {
		// Get it from config
		$currLanguage = getConfig('DEFAULT_LANG');

		// And save it in session
		setLanguage($currLanguage);
	} // END - if

	// Do we have the language file NOT?
	if (!isLanguageIncludeReadable($ext_name)) {
		// Switch to default (DO NOT CHANGE!!!)
		setLanguage('de');

		// And set it temporarily
		setConfigEntry('DEFAULT_LANG', 'de');
	} // END - if

	// Is the file there?
	if (isLanguageIncludeReadable($ext_name)) {
		// Load language file
		loadLanguageInclude($ext_name);
	} elseif ((isDebugModeEnabled()) && (getOutputMode() == '0') && ($ext_name != 'sql_patches') && (substr($ext_name, 0, 10) != 'admintheme')) {
		// No language file is not so good...
		logDebugMessage(__FUNCTION__, __LINE__, sprintf("NOTICE: Extension %s has no language file or we cannot read from it. lang=%s, mode=%s",
			$ext_name,
			getLanguage(),
			getExtensionMode()
		));
	}

	// Check for installation mode
	if ((isInstallationPhase()) || (!isAdminRegistered())) {
		// Load language file
		loadLanguageInclude('install');
	} // END - if
}

// Loads the language file
function loadLanguageInclude ($ext_name = 'none') {
	// Generate filename
	if ($ext_name == 'none') {
		// Generic
		$languageInclude = sprintf("inc/language/%s.php", getLanguage());
	} else {
		// Extension's language file
		$languageInclude = sprintf("inc/language/%s_%s.php", $ext_name, getLanguage());
	}

	// Check it before loading
	if (isLanguageIncludeReadable($ext_name)) {
		// Load it
		loadIncludeOnce($languageInclude);
	} else {
		// Not readable!
		DEBUG_LOG(__FUNCTION__, __LINE__, sprintf("Language file %s not found or readable.", $languageInclude));
	}
}

// [EOF]
?>