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<?php
/*
** $Id$
**
** ITools - the Internet Tools Library
**
** Copyright (C) 1995-2006 by the ITools Authors.
** This program is free software; you can redistribute it and/or
** modify it under the terms of either the GNU General Public License
** or the GNU Lesser General Public License, as published by the Free
** Software Foundation. See http://www.gnu.org/licenses/ for details.
**
*/
class it_text
{
var $actlanguage; # Selected language
var $defaultlanguage; # Browser language
var $languages = array(); # Active languages
var $languages_available = array(); # Available languages
var $statictext = array(); # Text array, read from php file on init
/**
* Constructor
* @param $p['cookiename'] optional cookie name (default: 'LANGUAGE')
* @param $p['debug'] optional debug mode: display label of unknown texts, set to 'label' to always display labels instead of actual text
* @param $p['fallbacklanguage'] optional language to use for undefined texts (useful for partially translated projects)
* @param $p['forcelanguage'] optional language to use instead of user's preferred language
* @param $p['phpfile'] optional texts file, defaults to service's phpinclude/texts.php
*/
function it_text($p = null)
{
$this->p = (array)$p + array('cookiename' => 'LANGUAGE', 'debug' => false, 'phpfile' => $GLOBALS['ULTRAHOME'] . '/phpinclude/texts.php');
# Read $this->statictext from php file if it's not defined yet
if (!$this->statictext)
include($this->p['phpfile']);
# Get array of supported languages and their names
$this->languages_available = $this->statictext['_'];
foreach($this->languages_available as $code => $languagename)
{
# Only use a language in browser/cookie detection below if it's not disabled by a leading '-'
if (substr($languagename, 0, 1) != '-')
{
$this->languages[$code] = $languagename;
if (!$this->actlanguage)
$this->initlang($code, "setting failsafe language");
}
}
# Set our default language according to browser preference
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE']))
{
foreach(explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']) as $code)
if ($this->initlang($code, "setting language from browser") || $this->initlang(substr($code, 0, 2), "setting language family from browser"))
break;
}
$this->defaultlanguage = $this->actlanguage;
$this->initlang(it::match('\.([a-z]{2})\.[^./]+$', $_SERVER['PHP_SELF']), "setting language from url override");
$this->initlang($this->languages[$_COOKIE[$this->p['cookiename']]], "setting language from cookie");
$this->initlang($this->p['forcelanguage'], "setting language from programmer override");
# Make this object available under $GLOBALS['it_text'], or add my texts to $GLOBALS['it_text'] if it exists
if (!$GLOBALS['it_text'])
$GLOBALS['it_text'] =& $this;
else
$GLOBALS['it_text']->statictext += $this->statictext;
}
# internal: overwrite language setting if code is valid, return success
function initlang($code, $debugmsg)
{
if ($this->languages[$code])
$this->actlanguage = $code;
return $this->languages[$code];
}
/**
* Instanciate singleton if necessary
*/
function init()
{
if (!$GLOBALS['it_text'])
new it_text;
}
/**
* INTERNAL function for T(): Return a text in the selected language.
* @param $label Label of text to return
* @param $raw Optional unused obsolete parameter
* @param $language Optional language to return text in.
* @return Localized text string
*/
function text($label, $raw = null, $language = null)
{
if ($this->p['debug'] === 'label')
return $label;
if (!isset($language))
$language = $this->actlanguage;
if (isset($this->statictext[$label][$language]))
return $this->statictext[$label][$language];
elseif ($this->p['fallbacklanguage'] && isset($this->statictext[$label][$this->p['fallbacklanguage']]))
return $this->statictext[$label][$this->p['fallbacklanguage']];
if ($fh = fopen($GLOBALS['ULTRAHOME'] . "/log/text_log", "a"))
{
fputs($fh, date("Y-m-d H:i:s") . "\t" . $_SERVER['REQUEST_URI'] . "\t" . $label . "\t" . $language . "\t" . it::replace(array('auto_prepend\S+\s+'=>''), it_debug::backtrace()) . "\n");
fclose($fh);
}
return $this->p['debug'] ? "<blink>$label ($language)</blink>" : '';
}
/**
* INTERNAL function for ET(): Return a text in the selected language
* Replaces variables of the form {obj.var} with value, e.g. {user.name}
* NOTE: Invalid object names or non-existing variables are simply deleted.
* @param $label Label of text to return
* @param $values Associative array containing values to fill in
* @param $language Optional language to return text in.
* @return Localized text string with variables replaced by their values
*/
function etext($label, $values = null, $language = null)
{
return $this->transmogrify($this->text($label, null, $language), $values);
}
/**
* INTERNAL function for T_set_language(): Change language
* @param $language New language to set
* @param $setcookie Optional flag if a cookie is to be set (default: true)
*/
function set_language($language, $setcookie = true)
{
# If $language is unknown, delete the cookie
if ($this->languages_available[$language])
{
if (!$this->languages[$language])
debug('Selected an existing but currently disabled language!', 6);
$this->actlanguage = $language;
if ($setcookie)
SetCookie($this->p['cookiename'], $this->actlanguage, time() + 31536000, '/'); # 1 year
}
else
{
$this->actlanguage = $this->defaultlanguage;
if ($setcookie)
SetCookie($this->p['cookiename'], '', time() + 31536000, '/');
}
}
/**
* INTERNAL function for T_lang(): Get active language
* @return currently active language
*/
function get_language()
{
return $this->actlanguage;
}
/**
* INTERNAL function for T_exists(): Check if a text entry for a specific label exists
* @param $label Label to check
* @return true if text exists in actual (or supplied) language, false otherwise.
*/
function text_exists($label, $language = null)
{
return isset($this->statictext[$label][isset($language) ? $language : $this->actlanguage]);
}
/**
* Create / overwrite a text in the selected language. Call dump_php() to make the change permanent.
* @param $label Label of text to change
* @param $text New text to set
* @param $language Optional language that is to be manipulated
*/
function set($label, $text = null, $language = null)
{
if (!isset($language))
$language = $this->actlanguage;
$this->statictext[$label][$language] = $text;
}
/**
* Replaces variables of the form {obj.var} with value, e.g. {user.name}
* NOTE: Invalid object names or non-existing variables are simply deleted.
*/
function transmogrify($text, $values = null)
{
while (preg_match('/{([\w.]+)}/', $text, $regs))
{
$path = explode('.', $regs[1]);
if ($values)
$value =& $values;
else
$value =& $GLOBALS;
# Recurse into nested arrays/object members
foreach ($path as $key)
{
if (is_object($value))
$value =& $value->$key;
else
$value =& $value[$key];
}
$text = str_replace($regs[0], $value, $text);
}
return $text;
}
/**
* Re-create php text file from $this->statictext
* @return true if successful, false if not (usually if file is not writeable by user www)
*/
function dump_php()
{
$result = false;
# Special sorting: natural, but _ is the first entry
$keys = array_keys($this->statictext);
natsort($keys);
foreach($keys as $key)
$text[$key] = $this->statictext[$key];
$this->statictext = array_merge(array('_' => $text['_']), $text);
$oldmask = umask(002);
if ($f = fopen($this->p['phpfile'], 'w'))
{
$result = (fputs($f, '<?php $this->statictext = ' . strtr(var_export($this->statictext, true), array("=> \n array (" => "=> array(", "array (\n '_'" => "array(\n'_'", "\n ),\n " => "\n),\n", "\n ),\n" => "\n)\n")) . ";\n?>\n") !== false);
fclose($f);
}
umask($oldmask);
return $result;
}
} /* End class it_text */
?>
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