<?php
##################################################
#
# Copyright (c) 2004-2020 OIC Group, Inc.
#
# This file is part of Exponent
#
# Exponent 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.
#
# GPL: http://www.gnu.org/licenses/gpl.txt
#
##################################################

/**
 * This is the class expLang
 *
 * @package Subsystems
 * @subpackage Subsystems
 */
/** @define "BASE" "../../.." */

class expLang {

    public static function initialize() {
        global $cur_lang, $default_lang, $default_lang_file, $target_lang_file, $custom_lang;

	    if (!defined('LANGUAGE'))
	        define('LANGUAGE', 'English - US');
		if (!defined('LANG')) {  // LANG is needed by YUI
			if ((is_readable(BASE . 'framework/core/lang/' . utf8_decode(LANGUAGE) . '.php'))) {
				define('LANG', LANGUAGE); // Lang file exists.
			} else {
				define('LANG', 'English - US'); // Fallback to 'English - US' if language file not present.
			}
		}

	    if (is_readable(BASE . 'framework/core/lang/' . utf8_decode(LANG).'.info.php')) {
			$info = include(BASE . 'framework/core/lang/' . utf8_decode(LANG).'.info.php');
            define('LOCALE', $info['locale']);
			setlocale(LC_ALL, $info['locale']);
            // For anything related to character sets:
            define('LANG_CHARSET', $info['charset']);
			//DEPRECATED: we no longer use views for i18n
			define('DEFAULT_VIEW', $info['default_view']);
	    } else {
            define('LOCALE', 'en_US');
			setlocale(LC_ALL, 'en_US');
            // For anything related to character sets:
            define('LANG_CHARSET', 'UTF-8');
		    //DEPRECATED: we no longer use views for i18n
		    define('DEFAULT_VIEW', 'Default');
	    }

        $default_lang_file = BASE . "framework/core/lang/English - US.php";
        if (DEVELOPMENT)
            $default_lang = include($default_lang_file);
        if (empty($default_lang))
  	        $default_lang = array();
        $target_lang_file = BASE . "framework/core/lang/" . utf8_decode(LANG) . ".php";
        $cur_lang = include($target_lang_file);
        if (empty($cur_lang))
            $cur_lang = array();

        // here's where we locate and merge any custom module language files
        $dir = THEME_ABSOLUTE . 'modules';
        if (is_readable($dir)) {
            $dh = opendir($dir);
            while (($f = readdir($dh)) !== false) {
                if (is_dir($dir . '/' . $f)) {
                    if ((is_readable($dir . '/' . $f . '/lang/' . utf8_decode(LANGUAGE) . '.php'))) {
                        $custom_lang_m = include($dir . '/' . $f . '/lang/' . utf8_decode(LANGUAGE) . '.php');
                        $cur_lang = array_merge($cur_lang, $custom_lang_m);
//                        $cur_lang += $custom_lang_m;
                    }
                }
            }
        }
        // and finally here's where we locate and merge a custom theme language file
        if ((is_readable(THEME_ABSOLUTE . 'lang/' . utf8_decode(LANGUAGE) . '.php'))) {
            $custom_lang = include(THEME_ABSOLUTE . 'lang/' . utf8_decode(LANGUAGE) . '.php');
            $cur_lang = array_merge($cur_lang, $custom_lang);
        }
    }

    /**
     * Get phrase from current language library
     *
     * Uses three constants for creating a language library
     * - WRITE_LANG_TEMPLATE - to create/add  phrases into the English (base) library
     * - DEBUG_LANGUAGE - to log phrases not found in the English library
     * - THEME_CUSTOM_LANGUAGE - to create/add phrases into a theme custom library for inclusion in custom modules
     *
     * @param $str
     * @return string
     */
	public static function gettext($str) {
        global $cur_lang;

	    if (!defined('LANG'))
	        return $str;
//        str_replace('"', "\'", $str);  // remove the killer double-quotes
	    $strt = array_key_exists(trim(addslashes($str)), $cur_lang) ? stripslashes($cur_lang[trim(addslashes($str))]) : $str;
        if (DEVELOPMENT && !empty($str) && !isset($cur_lang[trim(addslashes($str))])) { // if we're in development mode auto-add new phrases
            if (defined('THEME_CUSTOM_LANGUAGE') && THEME_CUSTOM_LANGUAGE)
                self::writeTemplate_custom($str);
            elseif (defined('WRITE_LANG_TEMPLATE') && WRITE_LANG_TEMPLATE && LANG === 'English - US')
                self::writeTemplate($str);  // write to the system default language file
            if (defined('DEBUG_LANGUAGE') && DEBUG_LANGUAGE)
                eLog('gt("' . trim($str) . '");', 'New phrase found');
        }
		return $strt;
	}

    /**
     * Add a new phrase to the default language file if WRITE_LANG_TEMPLATE turned on
     *
     * @param $str
     */
	public static function writeTemplate($str) {
	    global $default_lang, $default_lang_file;

	    if (strlen($str) < 2)
	        return;  // we never want single characters
        if (!array_key_exists(trim(addslashes(strip_tags($str))), $default_lang)) {
            $str = stripslashes(strip_tags($str));
            @$fp = fopen($default_lang_file, 'w+');
            if($fp === false && DEVELOPMENT) {
               flash('error',"I could not open $default_lang_file.");
               return;
            }
            $default_lang[trim(addslashes($str))] = trim(addslashes($str));  // add to default language array
            ksort($default_lang);
            fwrite($fp,"<?php\n");
            fwrite($fp,"return array(\n");
            foreach($default_lang as $key => $value){
                fwrite($fp,"\t\"" . $key . "\"=>\"" . $value . "\",\n");
            }
            fwrite($fp,");\n");
            fwrite($fp,"?>\n");
            fclose($fp);
        }
	}

    /**
     * Add a new phrase to the custom theme language file
     *
     * @param $str
     */
	public static function writeTemplate_custom($str) {
	    global $custom_lang, $default_lang;

        $str = stripslashes(strip_tags($str));
        expFile::makeDirectory('themes/' . DISPLAY_THEME . '/lang/');
        @$fp = fopen(THEME_ABSOLUTE . 'lang/' . utf8_decode(LANGUAGE) . '.php', 'w+');
        if($fp === false && DEVELOPMENT) {
            flash('error',"I could not open " . THEME_ABSOLUTE . 'lang/' . utf8_decode(LANGUAGE) . '.php');
            return;
        }
        $custom_lang[trim(addslashes($str))] = trim(addslashes($str));  // add to custom language array
        ksort($custom_lang);
        fwrite($fp,"<?php\n");
        fwrite($fp,"return array(\n");
        foreach($custom_lang as $key => $value){
            fwrite($fp,"\t\"".$key."\"=>\"".$value."\",\n");
        }
        fwrite($fp,");\n");
        fwrite($fp,"?>\n");
        fclose($fp);
	}

    /**
     * Populate/expand missing phrases in current language file from default language file
     *
     * @return int
     */
    public static function updateCurrLangFile() {
        global $cur_lang, $default_lang, $target_lang_file;

        if (empty($default_lang))
            $default_lang = include(BASE."framework/core/lang/English - US.php");
        $num_added = 0;
        if ((is_readable($target_lang_file))) {
            $fp = fopen($target_lang_file, 'w+') or die("I could not open $target_lang_file.");
            foreach ($default_lang as $key=>$value) {
                if (!array_key_exists($key,$cur_lang)) {
                    $cur_lang[$key] = $value;
                    $num_added++;
                }
            }
            ksort($cur_lang);
            fwrite($fp,"<?php\n");
            fwrite($fp,"return array(\n");
            foreach($cur_lang as $key => $value){
               fwrite($fp,"\t\"".$key."\"=>\"".$value."\",\n");
            }
            fwrite($fp,");\n");
            fwrite($fp,"?>\n");
            fclose($fp);
        }
        return $num_added;
   	}

    /**
     * Write the entire current phrase library (in memory) to it's language file
     */
    public static function saveCurrLangFile() {
        global $cur_lang, $target_lang_file;

        if ((is_readable($target_lang_file))) {
            $fp = fopen($target_lang_file, 'w+') or die("I could not open $target_lang_file.");
            ksort($cur_lang);
            fwrite($fp,"<?php\n");
            fwrite($fp,"return array(\n");
            foreach($cur_lang as $key => $value){
                $value = addslashes(stripslashes(strip_tags($value)));
                fwrite($fp,"\t\"".$key."\"=>\"".$value."\",\n");
            }
            fwrite($fp,");\n");
            fwrite($fp,"?>\n");
            fclose($fp);
        }
   	}

    public static function createNewLangFile($newlang) {
        global $cur_lang, $default_lang_file, $target_lang_file;

        $error = false;
        $result = array();
        if (!empty($newlang)) {
            $newlangfile = BASE."framework/core/lang/".utf8_decode($newlang).".php";
            if (((!file_exists($newlangfile)) && ($newlangfile != $default_lang_file && $newlangfile != $target_lang_file))) {
                $fp = fopen($newlangfile, 'w+') or die("I could not open $newlangfile.");
                ksort($cur_lang);
                fwrite($fp,"<?php\n");
                fwrite($fp,"return array(\n");
                foreach($cur_lang as $key => $value){
                   fwrite($fp,"\t\"".$key."\"=>\"".$value."\",\n");
                }
                fwrite($fp,");\n");
                fwrite($fp,"?>\n");
                fclose($fp);
                $result['message'] = $newlang." ".gt('Language Created!');
            } else {
                $error = true;
                $result['message'] = $newlang." ".gt('Language Already Exists!');
            }
        } else {
            $error = true;
            $result['message'] = gt('New Language').' "'.$newlang.'" '.gt('Cannot be Created').'!';
        }
        $result['type'] = $error ? 'error' : 'message';
        return $result;
   	}

    public static function createNewLangInfoFile($newlang,$newauthor,$newcharset,$newlocale) {
        if (!empty($newlang)) {
            if (empty($newcharset))
                $newcharset = 'UTF-8';
            $newlanginfofile = BASE."framework/core/lang/".utf8_decode($newlang).".info.php";
            if (((!file_exists($newlanginfofile)))) {
                $fp = fopen($newlanginfofile, 'w+') or die("I could not open $newlanginfofile.");
                fwrite($fp,"<?php\n");
                fwrite($fp,"return array(\n");
                fwrite($fp,"\t\"name\"=>\"".$newlang."\",\n");
                fwrite($fp,"\t\"author\"=>\"".$newauthor."\",\n");
                fwrite($fp,"\t\"charset\"=>\"".$newcharset."\",\n");
                fwrite($fp,"\t\"locale\"=>\"".$newlocale."\",\n");
                fwrite($fp,"\t\"default_view\"=>\"Default\",\n");
                fwrite($fp,");\n");
                fwrite($fp,"?>\n");
                fclose($fp);
            }
        }
   	}

    public static function langList() {
        global $default_lang;

   		$dir = BASE.'framework/core/lang';
        if (empty($default_lang))
            $default_lang = include(BASE."framework/core/lang/English - US.php");
   		$langs = array();
   		if (is_readable($dir)) {
   			$dh = opendir($dir);
   			while (($f = readdir($dh)) !== false) {
   				if (substr($f,-4,4) === '.php' && substr($f,-9,9) !== '.info.php') {
   					if (file_exists($dir.'/'.substr($f,0,-4).'.info.php')) {
   						$info = include($dir.'/'.substr($f,0,-4).'.info.php');
   						$langs[substr(utf8_encode($f),0,-4)] = $info['name'] . ' -- ' . $info['author'];
   					} else {
   						$langs[substr(utf8_encode($f),0,-4)] = substr($f,0,-4);
   					}
   				}
   			}
   		}
   		return $langs;
   	}

    public static function translate($text, $from = 'en', $to = 'fr') {
        $from1 = explode('_',$from);
        $from = $from1[0];
        $to1 = explode('_',$to);
        $to = $to1[0];
        if ($to === 'nb')
            $to = 'no';  // Bing uses 'no' for norwegian

        if (defined('TRANSLATE') && TRANSLATE === 'BING') {
            include_once(BASE.'external/translate/BingTranslate.class.php');
            include_once(BASE.'external/translate/bingapi.php');
            $gt = new BingTranslateWrapper(BING_API);
        } elseif (defined('TRANSLATE') && TRANSLATE === 'Azure') {
            require_once(BASE.'external/translate/config.inc.php'); // remainder of settings
            require_once(BASE.'external/translate/MicrosoftTranslator.class.php');
            include_once(BASE.'external/translate/bingapi.php');
            $gt = new MicrosoftTranslator(ACCOUNT_KEY);
        } else {
            require_once(BASE.'external/translate/mstranslation.class.php');
            include_once(BASE.'external/translate/bingapi.php');
            $gt = new TranslateMe(ACCOUNT_KEY);
        }

        return $gt->translate(stripslashes($text), $from, $to);
    }

    //fixme we need to add Azure methods?
    public static function getLangs() {
        include_once(BASE.'external/translate/BingTranslate.class.php');
        include_once(BASE.'external/translate/bingapi.php');
        $gt = new BingTranslateWrapper(BING_API);
        /* Enable the cache */
        return $gt->LanguagesSupported();
    }

}

?>