simpleWordsCloud/i18n.php

377 lines
9.6 KiB
PHP

<?php
/*
* Fork this project on GitHub!
* https://github.com/Philipp15b/php-i18n
*
* License: MIT
*/
class i18n {
/**
* Language file path
*
* This is the path for the language files.
* You must use the '{LANGUAGE}' placeholder for the language or
* the script wont find any language files.
*
* @var string
*/
protected $filePath = './lang/lang_{LANGUAGE}.ini';
/**
* Cache file path
*
* This is the path for all the cache files.
* Best is an empty directory with no other files in it.
*
* @var string
*/
protected $cachePath = './cache/lang/';
/**
* Fallback language
*
* This is the language which is used when there is no language file for
* all other user languages.
* It has the lowest priority.
* Remember to create a language file for the fallback!!
*
* @var string
*/
protected $fallbackLang = 'en';
/**
* Merge in fallback language
*
* Whether to merge current language's strings with the strings of
* the fallback language ($fallbackLang).
*
* @var bool
*/
protected $mergeFallback = true;
/**
* The class name of the compiled class that contains the translated texts.
* @var string
*/
protected $prefix = 'L';
/**
* Forced language
*
* If you want to force a specific language define it here.
*
* @var string
*/
protected $forcedLang = NULL;
/**
* This is the separator used if you use sections in your ini-file
*
* For example, if you have a string 'greeting' in a section 'welcomepage'
* you will can access it via 'L::welcomepage_greeting'.
* If you changed it to 'ABC' you could access your string
* via 'L::welcomepageABCgreeting'
*
* @var string
*/
protected $sectionSeparator = '_';
/*
* The following properties are only available after calling init().
*/
/**
* User languages
*
* These are the languages the user uses.
* Normally, if you use the getUserLangs-method this array will be
* filled in like this:
* 1. Forced language
* 2. Language in $_GET['lang']
* 3. Language in $_SESSION['lang']
* 4. Fallback language
*
* @var array
*/
protected $userLangs = array();
protected $appliedLang = NULL;
protected $langFilePath = NULL;
protected $cacheFilePath = NULL;
protected $isInitialized = false;
/**
* Constructor
*
* The constructor sets all important settings.
* All params are optional, you can set the options via extra functions too.
*
* @param string [$filePath] This is the path for the language files.
* You must use the '{LANGUAGE}' placeholder for the language.
* @param string [$cachePath] This is the path for all the cache files.
* Best is an empty directory with no other files in it. No placeholders.
* @param string [$fallbackLang] This is the language which is used
* when there is no language file for all other user languages.
* It has the lowest priority.
* @param string [$prefix] The class name of the compiled class
* that contains the translated texts. Defaults to 'L'.
*/
public function __construct(
$filePath = NULL,
$cachePath = NULL,
$fallbackLang = NULL,
$prefix = NULL)
{
// Apply settings
if ($filePath != NULL) {
$this->filePath = $filePath;
}
if ($cachePath != NULL) {
$this->cachePath = $cachePath;
}
if ($fallbackLang != NULL) {
$this->fallbackLang = $fallbackLang;
}
if ($prefix != NULL) {
$this->prefix = $prefix;
}
}
public function init() {
if ($this->isInitialized()) {
throw new BadMethodCallException(
'This object from class ' . __CLASS__ .
' is already initialized. ' .
'It is not possible to init one object twice!');
}
$this->isInitialized = true;
$this->userLangs = $this->getUserLangs();
// search for language file
$this->appliedLang = NULL;
foreach ($this->userLangs as $priority => $langcode) {
$this->langFilePath = $this->getConfigFilename($langcode);
if (file_exists($this->langFilePath)) {
$this->appliedLang = $langcode;
break;
}
}
if ($this->appliedLang == NULL) {
throw new RuntimeException('No language file was found.');
}
// search for cache file
$this->cacheFilePath =
$this->cachePath . '/php_i18n_' . md5_file(__FILE__) . '_' .
$this->prefix . '_' . $this->appliedLang . '.cache.php';
// whether we need to create a new cache file
$outdated = !file_exists($this->cacheFilePath) ||
filemtime($this->cacheFilePath) < filemtime($this->langFilePath) || // the language config was updated
($this->mergeFallback && filemtime($this->cacheFilePath) < filemtime($this->getConfigFilename($this->fallbackLang))); // the fallback language config was updated
if ($outdated || true) {
$config = $this->load($this->langFilePath);
if ($this->mergeFallback)
$config = array_replace_recursive($this->load($this->getConfigFilename($this->fallbackLang)), $config);
$compiled =
"<?php\n"
. "class " . $this->prefix . " {\n"
. $this->compile($config)
. ' public static function __callStatic($string, $args) {' . "\n"
. ' if (defined("self::" . $string)) {' . "\n"
. ' return vsprintf(constant("self::" . $string), $args);' . "\n"
. " }\n"
. " }\n"
. " function ".$this->prefix .'($string, $args=NULL) {' . "\n"
. ' $return = constant("'.$this->prefix.'::".$string);' . "\n"
. ' return $args ? vsprintf($return,$args) : $return;' . "\n"
. " }\n"
. '}';
if( ! is_dir($this->cachePath)) {
mkdir($this->cachePath, 0755, true);
}
if (file_put_contents($this->cacheFilePath, $compiled) === FALSE) {
throw new Exception("Could not write cache file to path '" . $this->cacheFilePath . "'. Is it writable?");
}
chmod($this->cacheFilePath, 0755);
}
require_once $this->cacheFilePath;
}
public function isInitialized() {
return $this->isInitialized;
}
public function getAppliedLang() {
return $this->appliedLang;
}
public function getCachePath() {
return $this->cachePath;
}
public function getFallbackLang() {
return $this->fallbackLang;
}
public function setFilePath($filePath) {
$this->fail_after_init();
$this->filePath = $filePath;
}
public function setCachePath($cachePath) {
$this->fail_after_init();
$this->cachePath = $cachePath;
}
public function setFallbackLang($fallbackLang) {
$this->fail_after_init();
$this->fallbackLang = $fallbackLang;
}
public function setMergeFallback($mergeFallback) {
$this->fail_after_init();
$this->mergeFallback = $mergeFallback;
}
public function setPrefix($prefix) {
$this->fail_after_init();
$this->prefix = $prefix;
}
public function setForcedLang($forcedLang) {
$this->fail_after_init();
$this->forcedLang = $forcedLang;
}
public function setSectionSeparator($sectionSeparator) {
$this->fail_after_init();
$this->sectionSeparator = $sectionSeparator;
}
/**
* @deprecated Use setSectionSeparator.
*/
public function setSectionSeperator($sectionSeparator) {
$this->setSectionSeparator($sectionSeparator);
}
/**
* Returns the user languages
*
* Normally it returns an array like this:
* 1. Forced language
* 2. Language in $_GET['lang']
* 3. Language in $_SESSION['lang']
* 4. HTTP_ACCEPT_LANGUAGE
* 5. Fallback language
* Note: duplicate values are deleted.
*
* @return array with the user languages sorted by priority.
*/
public function getUserLangs() {
$userLangs = array();
// Highest priority: forced language
if ($this->forcedLang != NULL) {
$userLangs[] = $this->forcedLang;
}
// 2nd highest priority: GET parameter 'lang'
if (isset($_GET['lang']) && is_string($_GET['lang'])) {
$userLangs[] = $_GET['lang'];
}
// 3rd highest priority: SESSION parameter 'lang'
if (isset($_SESSION['lang']) && is_string($_SESSION['lang'])) {
$userLangs[] = $_SESSION['lang'];
}
// 4th highest priority: HTTP_ACCEPT_LANGUAGE
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
foreach (explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']) as $part) {
$userLangs[] = strtolower(substr($part, 0, 2));
}
}
// Lowest priority: fallback
$userLangs[] = $this->fallbackLang;
// remove duplicate elements
$userLangs = array_unique($userLangs);
// remove illegal userLangs
$userLangs2 = array();
foreach ($userLangs as $key => $value) {
// only allow a-z, A-Z and 0-9 and _ and -
if (preg_match('/^[a-zA-Z0-9_-]*$/', $value) === 1)
$userLangs2[$key] = $value;
}
return $userLangs2;
}
protected function getConfigFilename($langcode) {
return str_replace('{LANGUAGE}', $langcode, $this->filePath);
}
protected function load($filename) {
$ext = substr(strrchr($filename, '.'), 1);
switch ($ext) {
case 'properties':
case 'ini':
$config = parse_ini_file($filename, true);
break;
case 'yml':
case 'yaml':
$config = spyc_load_file($filename);
break;
case 'json':
$config = json_decode(file_get_contents($filename), true);
break;
default:
throw new InvalidArgumentException($ext . " is not a valid extension!");
}
return $config;
}
/**
* Recursively compile an associative array to PHP code.
*/
protected function compile($config, $prefix = '') {
$code = '';
foreach ($config as $key => $value) {
if (is_array($value)) {
$code .= $this->compile($value, $prefix . $key . $this->sectionSeparator);
} else {
$fullName = $prefix . $key;
if (!preg_match('/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/', $fullName)) {
throw new InvalidArgumentException(__CLASS__ . ": Cannot compile translation key " . $fullName . " because it is not a valid PHP identifier.");
}
$code .= ' const ' . $fullName . ' = \'' . str_replace('\'', '\\\'', $value) . "';\n";
}
}
return $code;
}
protected function fail_after_init() {
if ($this->isInitialized()) {
throw new BadMethodCallException('This ' . __CLASS__ . ' object is already initalized, so you can not change any settings.');
}
}
}