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egroupware/api/src/Translation.php

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<?php
/**
* EGroupware API - Translations
*
* @link http://www.egroupware.org
* @author Joseph Engo <jengo@phpgroupware.org>
* @author Dan Kuykendall <seek3r@phpgroupware.org>
* Copyright (C) 2000, 2001 Joseph Engo
* @license http://opensource.org/licenses/lgpl-license.php LGPL - GNU Lesser General Public License
* @package api
* @version $Id$
*/
namespace EGroupware\Api;
/**
* EGroupware API - Translations
*
* All methods of this class can now be called static.
*
* Translations are cached tree-wide via Cache class.
*
* Translations are no longer stored in database, but load directly from *.lang files into cache.
* Only exception as instance specific translations: mainscreen, loginscreen and custom (see $instance_specific_translations)
*/
class Translation
{
/**
* Language of current user, will be set by init()
*
* @var string
*/
static $userlang = 'en';
/**
* Already loaded translations by applicaton
*
* @var array $app => $lang pairs
*/
static $loaded_apps = array();
/**
* Loaded phrases
*
* @var array $message_id => $translation pairs
*/
static $lang_arr = array();
/**
* Tables used by this class
*/
const LANG_TABLE = 'egw_lang';
const LANGUAGES_TABLE = 'egw_languages';
/**
* Directory for language files
*/
const LANG_DIR = 'lang';
/**
* Prefix of language files
*/
const LANGFILE_PREFIX = 'egw_';
/**
* Prefix of language files
*/
const LANGFILE_EXTENSION = '.lang';
/**
* Reference to global db-class
*
* @var Db
*/
static $db;
/**
* System charset
*
* @var string
*/
static $system_charset;
/**
* Is the mbstring extension available
*
* @var boolean
*/
static $mbstring;
/**
* Internal encoding / charset of PHP / mbstring (if loaded)
*
* @var string
*/
static $default_charset;
/**
* Application which translations have to be cached instance- and NOT tree-specific
*
* @var array
*/
static $instance_specific_translations = array('loginscreen','mainscreen','custom');
/**
* returns the charset to use (!$lang) or the charset of the lang-files or $lang
*
* @param string|boolean $lang =False return charset of the active user-lang, or $lang if specified
* @return string charset
*/
static function charset($lang=False)
{
static $charsets = array();
if ($lang)
{
if (!isset($charsets[$lang]))
{
if (!($charsets[$lang] = self::$db->select(self::LANG_TABLE,'content',array(
'lang' => $lang,
'message_id'=> 'charset',
'app_name' => 'common',
),__LINE__,__FILE__)->fetchColumn()))
{
$charsets[$lang] = 'utf-8';
}
}
return $charsets[$lang];
}
if (self::$system_charset) // do we have a system-charset ==> return it
{
$charset = self::$system_charset;
}
else
{
// if no translations are loaded (system-startup) use a default, else lang('charset')
$charset = !self::$lang_arr ? 'utf-8' : strtolower(self::translate('charset'));
}
// in case no charset is set, default to utf-8
if (empty($charset) || $charset == 'charset') $charset = 'utf-8';
// we need to set our charset as mbstring.internal_encoding if mbstring.func_overlaod > 0
// else we get problems for a charset is different from the default utf-8
$ini_default_charset = version_compare(PHP_VERSION, '5.6', '<') ? 'mbstring.internal_encoding' : 'default_charset';
if (ini_get($ini_default_charset) && self::$default_charset != $charset)
{
ini_set($ini_default_charset, self::$default_charset = $charset);
}
return $charset;
}
/**
* Initialises global lang-array and loads the 'common' and app-spec. translations
*
* @param boolean $load_translations =true should we also load translations for common and currentapp
*/
static function init($load_translations=true)
{
if (!isset(self::$db))
{
self::$db = isset($GLOBALS['egw_setup']) && isset($GLOBALS['egw_setup']->db) ? $GLOBALS['egw_setup']->db : $GLOBALS['egw']->db;
}
if (!isset($GLOBALS['egw_setup']))
{
self::$system_charset = $GLOBALS['egw_info']['server']['system_charset'];
}
else
{
self::$system_charset =& $GLOBALS['egw_setup']->system_charset;
}
if ((self::$mbstring = check_load_extension('mbstring')))
{
if(!empty(self::$system_charset))
{
$ini_default_charset = version_compare(PHP_VERSION, '5.6', '<') ? 'mbstring.internal_encoding' : 'default_charset';
ini_set($ini_default_charset, self::$system_charset);
}
}
// try loading load_via from tree-wide cache and check if it contains more rules
if (($load_via = Cache::getTree(__CLASS__, 'load_via')) &&
$load_via >= self::$load_via && // > for array --> contains more elements
// little sanity check: cached array contains all stock keys, otherwise ignore it
!array_diff_key(self::$load_via, $load_via))
{
self::$load_via = $load_via;
//error_log(__METHOD__."() load_via set from tree-wide cache to ".array2string(self::$load_via));
}
self::$lang_arr = self::$loaded_apps = array();
if ($load_translations)
{
if ($GLOBALS['egw_info']['user']['preferences']['common']['lang'])
{
self::$userlang = $GLOBALS['egw_info']['user']['preferences']['common']['lang'];
}
$apps = array('common');
// for eTemplate apps, load etemplate before app itself (allowing app to overwrite etemplate translations)
if (class_exists('EGroupware\\Api\\Etemplate', false) || class_exists('etemplate', false)) $apps[] = 'etemplate';
if ($GLOBALS['egw_info']['flags']['currentapp']) $apps[] = $GLOBALS['egw_info']['flags']['currentapp'];
// load instance specific translations last, so they can overwrite everything
$apps[] = 'custom';
self::add_app($apps);
if (!count(self::$lang_arr))
{
self::$userlang = 'en';
self::add_app($apps);
}
}
}
/**
* translates a phrase and evtl. substitute some variables
*
* @param string $key phrase to translate, may contain placeholders %N (N=1,2,...) for vars
* @param array $vars =null vars to replace the placeholders, or null for none
* @param string $not_found ='*' what to add to not found phrases, default '*'
* @return string with translation
*/
static function translate($key, $vars=null, $not_found='' )
{
if (!self::$lang_arr)
{
self::init();
}
$ret = $key; // save key if we dont find a translation
if ($not_found) $ret .= $not_found;
if (isset(self::$lang_arr[$key]))
{
$ret = self::$lang_arr[$key];
}
else
{
$new_key = strtolower($key);
if (isset(self::$lang_arr[$new_key]))
{
$ret = self::$lang_arr[$new_key];
}
}
if (is_array($vars) && count($vars))
{
if (count($vars) > 1)
{
static $placeholders = array('%3','%2','%1','|%2|','|%3|','%4','%5','%6','%7','%8','%9','%10');
// to cope with $vars[0] containing '%2' (eg. an urlencoded path like a referer),
// we first replace '%2' in $ret with '|%2|' and then use that as 2. placeholder
// we do that for %3 as well, ...
$vars = array_merge(array('|%3|','|%2|'),$vars); // push '|%2|' (and such) as first replacement on $vars
$ret = str_replace($placeholders,$vars,$ret);
}
else
{
$ret = str_replace('%1',$vars[0],$ret);
}
}
return $ret;
}
/**
* Adds translations for (multiple) application(s)
*
* By default the translations are read from the tree-wide cache
*
* @param string|array $apps name(s) of application(s) to add (or 'common' for the general translations)
* if multiple names given, they are requested in one request from cache and loaded in given order
* @param string $lang =false 2 or 5 char lang-code or false for the users language
*/
static function add_app($apps, $lang=null)
{
//error_log(__METHOD__."(".array2string($apps).", $lang) count(self::\$lang_arr)=".count(self::$lang_arr));
//$start = microtime(true);
if (!$lang) $lang = self::$userlang;
$tree_level = $instance_level = array();
if (!is_array($apps)) $apps = (array)$apps;
foreach($apps as $key => $app)
{
if (!isset(self::$loaded_apps[$app]) || self::$loaded_apps[$app] != $lang && $app != 'common')
{
if (in_array($app, self::$instance_specific_translations))
{
$instance_level[] = $app.':'.($app == 'custom' ? 'en' : $lang);
}
else
{
$tree_level[] = $app.':'.$lang;
}
}
else
{
unset($apps[$key]);
}
}
// load all translations from cache at once
if ($tree_level) $tree_level = Cache::getTree(__CLASS__, $tree_level);
if ($instance_level) $instance_level = Cache::getInstance(__CLASS__, $instance_level);
// merging loaded translations together
$updated_load_via = false;
foreach((array)$apps as $app)
{
$l = $app == 'custom' ? 'en' : $lang;
if (isset($tree_level[$app.':'.$l]))
{
$loaded =& $tree_level[$app.':'.$l];
}
elseif (isset($instance_level[$app.':'.$l]))
{
$loaded =& $instance_level[$app.':'.$l];
}
else
{
if (($instance_specific = in_array($app, self::$instance_specific_translations)))
{
$loaded =& self::load_app($app, $l);
}
else
{
$loaded =& self::load_app_files($app, $l, null, $updated_load_via);
}
//error_log(__METHOD__."('$app', '$lang') instance_specific=$instance_specific, load_app(_files)() returned ".(is_array($loaded)?'Array('.count($loaded).')':array2string($loaded)));
if ($loaded || $instance_specific)
{
Cache::setCache($instance_specific ? Cache::INSTANCE : Cache::TREE,
__CLASS__, $app.':'.$l, $loaded);
//error_log(__METHOD__."('$app', '$lang') caching now ".(is_array($loaded)?'Array('.count($loaded).')':array2string($loaded)));
}
}
if ($loaded)
{
self::$lang_arr = array_merge(self::$lang_arr, $loaded);
self::$loaded_apps[$app] = $l; // dont set something not existing to $loaded_apps, no need to load client-side
}
}
// Re-merge custom over instance level, they have higher precidence
if($tree_level && !$instance_level && self::$instance_specific_translations)
{
$custom = Cache::getInstance(__CLASS__, 'custom:en');
if($custom)
{
self::$lang_arr = array_merge(self::$lang_arr, $custom);
}
}
if ($updated_load_via)
{
self::update_load_via();
}
//error_log(__METHOD__.'('.array2string($apps).", '$lang') took ".(1000*(microtime(true)-$start))." ms, loaded_apps=".array2string(self::$loaded_apps).", loaded ".count($loaded)." phrases -> total=".count(self::$lang_arr));//.": ".function_backtrace());
}
/**
* Loads translations for an application from the database or direct from the lang-file for setup
*
* Never use directly, use add_app(), which employes caching (it has to be public, to act as callback for the cache!).
*
* @param string $app name of the application to add (or 'common' for the general translations)
* @param string $lang =false 2 or 5 char lang-code or false for the users language
* @return array the loaded strings
*/
static function &load_app($app,$lang)
{
//$start = microtime(true);
if (is_null(self::$db)) self::init(false);
$loaded = array();
foreach(self::$db->select(self::LANG_TABLE,'message_id,content',array(
'lang' => $lang,
'app_name' => $app,
),__LINE__,__FILE__) as $row)
{
$loaded[strtolower($row['message_id'])] = $row['content'];
}
//error_log(__METHOD__."($app,$lang) took ".(1000*(microtime(true)-$start))." ms to load ".count($loaded)." phrases");
return $loaded;
}
/**
* How to load translations for a given app
*
* Translations for common, preferences or admin are in spread over all applications.
* Api, old phpgwapi and etemplate have translations for some pseudo-apps.
*
* @var array app => app(s) or string 'all-apps'
*/
static $load_via = array(
'common' => 'all-apps',
'preferences' => 'all-apps',
'admin' => 'all-apps',
'jscalendar' => array('phpgwapi'),
'sitemgr-link' => array('sitemgr'),
'groupdav' => array('api'),
'developer_tools' => array('etemplate'),
'login' => array('api','registration'),
);
/**
* Check if cached translations are up to date or invalidate cache if not
*
* Called via login.php for each interactive login.
*/
static function check_invalidate_cache()
{
$lang = $GLOBALS['egw_info']['user']['preferences']['common']['lang'];
$apps = array_keys($GLOBALS['egw_info']['apps']);
foreach($apps as $app)
{
$file = self::get_lang_file($app, $lang);
// check if file has changed compared to what's cached
if (file_exists($file))
{
$cached_time = Cache::getTree(__CLASS__, $file);
$file_time = filemtime($file);
if ($cached_time != $file_time)
{
//error_log(__METHOD__."() $file MODIFIED ($cached_time != $file_time)");
self::invalidate_lang_file($app, $lang);
}
//else error_log(__METHOD__."() $file unchanged ($cached_time == $file_time)");
}
}
}
/**
* Invalidate cache for lang-file of $app and $lang
*
* @param string $app
* @param string $lang
*/
static function invalidate_lang_file($app, $lang)
{
//error_log(__METHOD__."('$app', '$lang') invalidate translations $app:$lang");
Cache::unsetTree(__CLASS__, $app.':'.$lang);
Cache::unsetTree(__CLASS__, self::get_lang_file($app, $lang));
foreach(self::$load_via as $load => $via)
{
//error_log("load_via[load='$load'] = via = ".array2string($via));
if ($via === 'all-apps' || in_array($app, (array)$via))
{
//error_log(__METHOD__."('$app', '$lang') additional invalidate translations $load:$lang");
Cache::unsetTree(__CLASS__, $load.':'.$lang);
Cache::unsetTree(__CLASS__, self::get_lang_file($load, $lang));
}
}
// unset statistics
Cache::unsetTree(__CLASS__, 'statistics');
}
const STATISTIC_CACHE_TIMEOUT = 86400;
/**
* Statistical values about how much a language and app is translated, number or valid phrases per $lang or $lang/$app
*
* @param string $_lang =null
* @return array $lang or $app => number pairs
*/
static function statistics($_lang=null)
{
$cache = Cache::getTree(__CLASS__, 'statistics');
if (!isset($cache[(string)$_lang]))
{
$cache[(string)$_lang] = array();
if (empty($_lang))
{
$en_phrases = array_keys(self::load_app_files(null, 'en', 'all-apps'));
$cache['']['en'] = count($en_phrases);
foreach(array_keys(self::get_available_langs()) as $lang)
{
if ($lang == 'en') continue;
$lang_phrases = array_keys(self::load_app_files(null, $lang, 'all-apps'));
$valid_phrases = array_intersect($lang_phrases, $en_phrases);
$cache[''][$lang] = count($valid_phrases);
}
}
else
{
$cache['en'] = array();
foreach(scandir(EGW_SERVER_ROOT) as $app)
{
if ($app[0] == '.' || !is_dir(EGW_SERVER_ROOT.'/'.$app) ||
!file_exists(self::get_lang_file($app, 'en')))
{
continue;
}
$en_phrases = array_keys(self::load_app_files(null, 'en', $app));
if (count($en_phrases) <= 2) continue;
$cache['en'][$app] = count($en_phrases);
$lang_phrases = array_keys(self::load_app_files(null, $_lang, $app));
$valid_phrases = array_intersect($lang_phrases, $en_phrases);
$cache[$_lang][$app] = count($valid_phrases);
}
asort($cache['en'], SORT_NUMERIC);
$cache['en'] = array_reverse($cache['en'], true);
}
asort($cache[(string)$_lang], SORT_NUMERIC);
$cache[(string)$_lang] = array_reverse($cache[(string)$_lang], true);
Cache::setTree(__CLASS__, 'statistics', $cache, self::STATISTIC_CACHE_TIMEOUT);
}
return $cache[(string)$_lang];
}
/**
* Get a state / etag for a given app's translations
*
* We currently only use a single state for all none-instance-specific apps depending on self::max_lang_time().
*
* @param string $_app
* @param string $_lang
* @return string
*/
static function etag($_app, $_lang)
{
if (!in_array($_app, self::$instance_specific_translations))
{
// check if cache is NOT invalided by checking if we have a modification time for concerned lang-file
$time = Cache::getTree(__CLASS__, $file=self::get_lang_file($_app, $_lang));
// if we dont have one, cache has been invalidated and we need to load translations
if (!isset($time)) self::add_app($_app, $_lang);
$etag = self::max_lang_time();
}
else
{
$etag = md5(json_encode(Cache::getCache(Cache::INSTANCE, __CLASS__, $_app.':'.$_lang)));
}
//error_log(__METHOD__."('$_app', '$_lang') returning '$etag'");
return $etag;
}
/**
* Get or set maximum / latest modification-time for files of not instance-specific translations
*
* @param type $time
* @return type
*/
static function max_lang_time($time=null)
{
static $max_lang_time = null;
if (!isset($max_lang_time) || isset($time))
{
$max_lang_time = Cache::getTree(__CLASS__, 'max_lang_time');
}
if (isset($time) && $time > $max_lang_time)
{
//error_log(__METHOD__."($time) updating previous max_lang_time=$max_lang_time to $time");
Cache::setTree(__CLASS__, 'max_lang_time', $max_lang_time=$time);
}
return $max_lang_time;
}
/**
* Loads translations for an application direct from the lang-file(s)
*
* Never use directly, use add_app(), which employes caching (it has to be public, to act as callback for the cache!).
*
* @param string $app name of the application to add (or 'common' for the general translations)
* @param string $lang =false 2 or 5 char lang-code or false for the users language
* @param string $just_app_file =null if given only that app is loaded ignoring self::$load_via
* @param boolean $updated_load_via =false on return true if self::$load_via was updated
* @return array the loaded strings
*/
static function &load_app_files($app, $lang, $just_app_file=null, &$updated_load_via=false)
{
//$start = microtime(true);
$load_app = isset($just_app_file) ? $just_app_file : (isset(self::$load_via[$app]) ? self::$load_via[$app] : $app);
$loaded = array();
foreach($load_app == 'all-apps' ? scandir(EGW_SERVER_ROOT) : (array)$load_app as $app_dir)
{
if ($load_app == 'all-apps' && $app_dir=='..') continue; // do not try to break out of egw server root
if ($app_dir[0] == '.' || !is_dir(EGW_SERVER_ROOT.'/'.$app_dir) ||
!@file_exists($file=self::get_lang_file($app_dir, $lang)) ||
!($f = fopen($file, 'r')))
{
continue;
}
// store ctime of file we parse
Cache::setTree(__CLASS__, $file, $time=filemtime($file));
self::max_lang_time($time);
$line_nr = 0;
//use fgets and split the line, as php5.3.3 with squeeze does not support splitting lines with fgetcsv while reading properly
//if the first letter after the delimiter is a german umlaut (UTF8 representation thereoff)
//while(($line = fgetcsv($f, 1024, "\t")))
while(($read = fgets($f)))
{
$line = explode("\t", trim($read));
++$line_nr;
if (count($line) != 4) continue;
list($l_id,$l_app,$l_lang,$l_translation) = $line;
if ($l_lang != $lang) continue;
if (!isset($just_app_file) && $l_app != $app)
{
// check if $l_app contained in file in $app_dir is mentioned in $load_via
if ($l_app != $app_dir && (!isset(self::$load_via[$l_app]) ||
!array_intersect((array)self::$load_via[$l_app], array('all-apps', $app_dir))))
{
if (!isset(self::$load_via[$l_app]) && !file_exists(EGW_SERVER_ROOT.'/'.$l_app))
{
error_log(__METHOD__."() lang file $file contains invalid app '$l_app' on line $line_nr --> ignored");
continue;
}
// if not update load_via accordingly and store it as config
//error_log(__METHOD__."() load_via does not contain $l_app => $app_dir");
if (!isset(self::$load_via[$l_app])) self::$load_via[$l_app] = array($l_app);
if (!is_array(self::$load_via[$l_app])) self::$load_via[$l_app] = array(self::$load_via[$l_app]);
self::$load_via[$l_app][] = $app_dir;
$updated_load_via = true;
}
else if ($l_app != $app_dir &&
array_intersect((array)self::$load_via[$l_app], array('all-apps', $app_dir)))
{
$loaded[$l_id] = $l_translation;
}
continue;
}
$loaded[$l_id] = $l_translation;
}
fclose($f);
}
//error_log(__METHOD__."('$app', '$lang') returning ".(is_array($loaded)?'Array('.count($loaded).')':array2string($loaded))." in ".number_format(microtime(true)-$start,3)." secs".' '.function_backtrace());
return $loaded;
}
/**
* Update tree-wide stored load_via with our changes
*
* Merging in meantime stored changes from other instances to minimize race-conditions
*/
protected static function update_load_via()
{
if (($load_via = Cache::getTree(__CLASS__, 'load_via')) &&
// little sanity check: cached array contains all stock keys, otherwise ignore it
!array_diff_key(self::$load_via, $load_via))
{
foreach($load_via as $app => $via)
{
if (self::$load_via[$app] != $via)
{
//error_log(__METHOD__."() setting load_via[$app]=".array2string($via));
self::$load_via[$app] = array_unique(array_merge((array)self::$load_via[$app], (array)$via));
}
}
}
Cache::setTree(__CLASS__, 'load_via', self::$load_via);
}
/**
* Cached languages
*
* @var array
*/
static $langs;
/**
* Returns a list of available languages / translations
*
* @param boolean $translate =true translate language-names
* @param boolean $force_read =false force a re-read of the languages
* @return array with lang-code => descriptiv lang-name pairs
*/
static function get_available_langs($translate=true, $force_read=false)
{
if (!is_array(self::$langs) || $force_read)
{
if (!($f = fopen($file=EGW_SERVER_ROOT.'/setup/lang/languages','rb')))
{
throw new Exception("List of available languages (%1) missing!", $file);
}
while(($line = fgetcsv($f, null, "\t")))
{
self::$langs[$line[0]] = $line[1];
}
fclose($f);
if ($translate)
{
if (is_null(self::$db)) self::init(false);
foreach(self::$langs as $lang => $name)
{
self::$langs[$lang] = self::translate($name,False,'');
}
}
uasort(self::$langs,'strcasecmp');
}
return self::$langs;
}
/**
* Returns a list of installed languages / translations
*
* Translations no longer need to be installed, therefore all available translations are returned here.
*
* @param boolean $force_read =false force a re-read of the languages
* @return array with lang-code => descriptiv lang-name pairs
*/
static function get_installed_langs($force_read=false)
{
return self::get_available_langs($force_read);
}
/**
* translates a 2 or 5 char lang-code into a (verbose) language
*
* @param string $lang
* @return string|false language or false if not found
*/
static function lang2language($lang)
{
if (isset(self::$langs[$lang])) // no need to query the DB
{
return self::$langs[$lang];
}
return self::$db->select(self::LANGUAGES_TABLE,'lang_name',array('lang_id' => $lang),__LINE__,__FILE__)->fetchColumn();
}
/**
* List all languages, first available ones, then the rest
*
* @param boolean $force_read =false
* @return array with lang_id => lang_name pairs
*/
static function list_langs($force_read=false)
{
if (!$force_read)
{
return Cache::getInstance(__CLASS__,'list_langs',array(__CLASS__,'list_langs'),array(true));
}
$languages = self::get_installed_langs(); // available languages
$availible = "('".implode("','",array_keys($languages))."')";
// this shows first the installed, then the available and then the rest
foreach(self::$db->select(self::LANGUAGES_TABLE,array(
'lang_id','lang_name',
"CASE WHEN lang_id IN $availible THEN 1 ELSE 0 END AS availible",
),"lang_id NOT IN ('".implode("','",array_keys($languages))."')",__LINE__,__FILE__,false,' ORDER BY availible DESC,lang_name') as $row)
{
$languages[$row['lang_id']] = $row['lang_name'];
}
return $languages;
}
/**
* provides centralization and compatibility to locate the lang files
*
* @param string $app application name
* @param string $lang language code
* @return the full path of the filename for the requested app and language
*/
static function get_lang_file($app,$lang)
{
if ($app == 'common') $app = 'phpgwapi';
return EGW_SERVER_ROOT.'/'.$app.'/'.self::LANG_DIR.'/'.self::LANGFILE_PREFIX.$lang.self::LANGFILE_EXTENSION;
}
/**
* returns a list of installed charsets
*
* @return array with charset as key and comma-separated list of langs useing the charset as data
*/
static function get_installed_charsets()
{
static $charsets=null;
if (!isset($charsets))
{
$charsets = array(
'utf-8' => lang('Unicode').' (utf-8)',
'iso-8859-1' => lang('Western european').' (iso-8859-1)',
'iso-8859-2' => lang('Eastern european').' (iso-8859-2)',
'iso-8859-7' => lang('Greek').' (iso-8859-7)',
'euc-jp' => lang('Japanese').' (euc-jp)',
'euc-kr' => lang('Korean').' (euc-kr)',
'koi8-r' => lang('Russian').' (koi8-r)',
'windows-1251' => lang('Bulgarian').' (windows-1251)',
'cp850' => lang('DOS International').' (CP850)',
);
}
return $charsets;
}
/**
* Transliterate utf-8 filename to ascii, eg. 'Äpfel' --> 'Aepfel'
*
* @param string $_str
* @return string
*/
static function to_ascii($_str)
{
static $extra = array(
'&szlig;' => 'ss',
);
$entities = htmlentities($_str,ENT_QUOTES,self::charset());
$estr = str_replace(array_keys($extra),array_values($extra), $entities);
$ustr = preg_replace('/&([aAuUoO])uml;/','\\1e', $estr); // replace german umlauts with the letter plus one 'e'
$astr = preg_replace('/&([a-zA-Z])(grave|acute|circ|ring|cedil|tilde|slash|uml);/','\\1', $ustr); // remove all types of accents
return preg_replace('/&([a-zA-Z]+|#[0-9]+|);/','', $astr); // remove all other entities
}
/**
* converts a string $data from charset $from to charset $to
*
* @param string|array $data string(s) to convert
* @param string|boolean $from charset $data is in or False if it should be detected
* @param string|boolean $to charset to convert to or False for the system-charset the converted string
* @param boolean $check_to_from =true internal to bypass all charset replacements
* @return string|array converted string(s) from $data
*/
static function convert($data,$from=False,$to=False,$check_to_from=true)
{
if ($check_to_from)
{
if ($from) $from = strtolower($from);
if ($to) $to = strtolower($to);
if (!$from)
{
$from = self::$mbstring ? strtolower(mb_detect_encoding($data)) : 'iso-8859-1';
if($from == 'ascii')
{
$from = 'iso-8859-1';
}
//echo "<p>autodetected charset of '$data' = '$from'</p>\n";
}
/*
php does not seem to support gb2312
but seems to be able to decode it as EUC-CN
*/
switch($from)
{
case 'ks_c_5601-1987':
$from = 'CP949';
break;
case 'gb2312':
case 'gb18030':
$from = 'EUC-CN';
break;
case 'windows-1252':
case 'mswin1252':
if (function_exists('iconv'))
{
$prefer_iconv = true;
break;
}
// fall throught to remap to iso-8859-1
case 'us-ascii':
case 'macroman':
case 'iso8859-1':
case 'windows-1258':
$from = 'iso-8859-1';
break;
case 'windows-1250':
$from = 'iso-8859-2';
break;
case 'windows-1257':
$from = 'iso-8859-13';
break;
case 'windows-874':
case 'tis-620':
case 'windows-1256':
$prefer_iconv = true;
break;
}
if (!$to)
{
$to = self::charset();
}
if ($from == $to || !$from || !$to || !$data)
{
return $data;
}
}
if (is_array($data))
{
foreach($data as $key => $str)
{
$ret[$key] = self::convert($str,$from,$to,false); // false = bypass the above checks, as they are already done
}
return $ret;
}
if ($from == 'iso-8859-1' && $to == 'utf-8')
{
return utf8_encode($data);
}
if ($to == 'iso-8859-1' && $from == 'utf-8')
{
return utf8_decode($data);
}
if (self::$mbstring && !$prefer_iconv && ($data = @mb_convert_encoding($data,$to,$from)) != '')
{
return $data;
}
if (function_exists('iconv'))
{
// iconv can not convert from/to utf7-imap
if ($to == 'utf7-imap' && function_exists(imap_utf7_encode))
{
$data_iso = iconv($from, 'iso-8859-1', $data);
$convertedData = imap_utf7_encode($data_iso);
return $convertedData;
}
if ($from == 'utf7-imap' && function_exists(imap_utf7_decode))
{
$data_iso = imap_utf7_decode($data);
$convertedData = iconv('iso-8859-1', $to, $data_iso);
return $convertedData;
}
// the following is to workaround patch #962307
// if using EUC-CN, for iconv it strickly follow GB2312 and fail
// in an email on the first Traditional/Japanese/Korean character,
// but in reality when people send mails in GB2312, UMA mostly use
// extended GB13000/GB18030 which allow T/Jap/Korean characters.
if($from == 'euc-cn')
{
$from = 'gb18030';
}
if (($convertedData = iconv($from,$to,$data)))
{
return $convertedData;
}
}
return $data;
}
/**
* converts a string $data from charset $from to something that is json_encode tested
*
* @param string|array $_data string(s) to convert
* @param string|boolean $from charset $data is in or False if it should be detected
* @return string|array converted string(s) from $data
*/
static function convert_jsonsafe($_data,$from=False)
{
if ($from===false) $from = self::detect_encoding($_data);
$data = self::convert($_data, strtolower($from));
// in a way, this tests if we are having real utf-8 (the displayCharset) by now; we should if charsets reported (or detected) are correct
if (strtoupper(self::charset()) == 'UTF-8')
{
$test = @json_encode($data);
//error_log(__METHOD__.__LINE__.' ->'.strlen($data).' Error:'.json_last_error().'<- data:#'.$test.'#');
if (($test=="null" || $test === false || is_null($test)) && strlen($data)>0)
{
// try to fix broken utf8
$x = (function_exists('mb_convert_encoding')?mb_convert_encoding($data,'UTF-8','UTF-8'):(function_exists('iconv')?@iconv("UTF-8","UTF-8//IGNORE",$data):$data));
$test = @json_encode($x);
if (($test=="null" || $test === false || is_null($test)) && strlen($data)>0)
{
// this should not be needed, unless something fails with charset detection/ wrong charset passed
error_log(__METHOD__.__LINE__.' Charset Reported:'.$from.' Charset Detected:'.self::detect_encoding($data));
$data = utf8_encode($data);
}
else
{
$data = $x;
}
}
}
return $data;
}
/**
* insert/update/delete one phrase in the lang-table
*
* @param string $lang
* @param string $app
* @param string $message_id
* @param string $content translation or null to delete translation
*/
static function write($lang,$app,$message_id,$content)
{
if ($content)
{
self::$db->insert(self::LANG_TABLE,array(
'content' => $content,
),array(
'lang' => $lang,
'app_name' => $app,
'message_id' => $message_id,
),__LINE__,__FILE__);
}
else
{
self::$db->delete(self::LANG_TABLE,array(
'lang' => $lang,
'app_name' => $app,
'message_id' => $message_id,
),__LINE__,__FILE__);
}
// invalidate the cache
if(!in_array($app,self::$instance_specific_translations))
{
Cache::unsetCache(Cache::TREE,__CLASS__,$app.':'.$lang);
}
else
{
foreach(array_keys((array)self::get_installed_langs()) as $key)
{
Cache::unsetCache(Cache::INSTANCE,__CLASS__,$app.':'.$key);
}
}
}
/**
* read one phrase from the lang-table
*
* @param string $lang
* @param string $app_name
* @param string $message_id
* @return string|boolean content or false if not found
*/
static function read($lang,$app_name,$message_id)
{
return self::$db->select(self::LANG_TABLE,'content',array(
'lang' => $lang,
'app_name' => $app_name,
'message_id' => $message_id,
),__LINE__,__FILE__)->fetchColumn();
}
/**
* Return the message_id of a given translation
*
* @param string $translation
* @param string $app ='' default check all apps
* @param string $lang ='' default check all langs
* @return string
*/
static function get_message_id($translation,$app=null,$lang=null)
{
$where = array('content '.self::$db->capabilities[Db::CAPABILITY_CASE_INSENSITIV_LIKE].' '.self::$db->quote($translation));
if ($app) $where['app_name'] = $app;
if ($lang) $where['lang'] = $lang;
$id = self::$db->select(self::LANG_TABLE,'message_id',$where,__LINE__,__FILE__)->fetchColumn();
// Check cache, since most things aren't in the DB anymore
if(!$id)
{
$ids = array_filter(array_keys(self::$lang_arr), function($haystack) use($translation) {
return stripos(self::$lang_arr[$haystack],$translation) !== false;
});
$id = array_shift($ids);
if(!$id && ($lang && $lang !== 'en' || self::$userlang != 'en'))
{
// Try english
if (in_array($app, self::$instance_specific_translations))
{
$instance_level[] = $app.':en';
}
else
{
$tree_level[] = $app.':en';
}
// load all translations from cache at once
if ($tree_level) $lang_arr = Cache::getTree(__CLASS__, $tree_level);
if ($instance_level) $lang_arr = Cache::getInstance(__CLASS__, $instance_level);
$lang_arr = $lang_arr[$app.':en'];
$ids = array_filter(array_keys($lang_arr), function($haystack) use($translation, $lang_arr) {
return stripos($lang_arr[$haystack],$translation) !== false;
});
$id = array_shift($ids);
}
}
return $id;
}
/**
* detect_encoding - try to detect the encoding
* only to be used if the string in question has no structure that determines his encoding
*
* @param string - to be evaluated
* @param string $verify =null encoding to verify, get checked first and have a match for only ascii or no detection available
* @return string - encoding
*/
static function detect_encoding($string, $verify=null)
{
if (function_exists('iconv'))
{
$list = array('utf-8', 'iso-8859-1', 'windows-1251'); // list may be extended
if ($verify) array_unshift($list, $verify);
foreach ($list as $item)
{
$sample = iconv($item, $item, $string);
if ($sample == $string)
{
return $item;
}
}
}
if (self::$mbstring)
{
$detected = strtolower(mb_detect_encoding($string));
}
if ($verify && (!isset($detected) || $detected === 'ascii'))
{
return $verify; // ascii matches all charsets
}
return isset($detected) ? $detected : 'iso-8859-1'; // we choose to return iso-8859-1 as default
}
}
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