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<?php
namespace Gettext;
use Gettext\Generators\PhpArray;
class Translator extends BaseTranslator implements TranslatorInterface
{
private $domain;
private $dictionary = [];
private $plurals = [];
/**
* Loads translation from a Translations instance, a file on an array.
*
* @param Translations|string|array $translations
*
* @return self
*/
public function loadTranslations($translations)
{
if (is_object($translations) && $translations instanceof Translations) {
$translations = PhpArray::generate($translations);
} elseif (is_string($translations) && is_file($translations)) {
$translations = include $translations;
} elseif (!is_array($translations)) {
throw new \InvalidArgumentException(
'Invalid Translator: only arrays, files or instance of Translations are allowed'
);
}
$this->addTranslations($translations);
return $this;
}
/**
* Set the default domain.
*
* @param string $domain
*
* @return self
*/
public function defaultDomain($domain)
{
$this->domain = $domain;
return $this;
}
/**
* @see TranslatorInterface
*
* {@inheritdoc}
*/
public function gettext($original)
{
return $this->dpgettext($this->domain, null, $original);
}
/**
* @see TranslatorInterface
*
* {@inheritdoc}
*/
public function ngettext($original, $plural, $value)
{
return $this->dnpgettext($this->domain, null, $original, $plural, $value);
}
/**
* @see TranslatorInterface
*
* {@inheritdoc}
*/
public function dngettext($domain, $original, $plural, $value)
{
return $this->dnpgettext($domain, null, $original, $plural, $value);
}
/**
* @see TranslatorInterface
*
* {@inheritdoc}
*/
public function npgettext($context, $original, $plural, $value)
{
return $this->dnpgettext($this->domain, $context, $original, $plural, $value);
}
/**
* @see TranslatorInterface
*
* {@inheritdoc}
*/
public function pgettext($context, $original)
{
return $this->dpgettext($this->domain, $context, $original);
}
/**
* @see TranslatorInterface
*
* {@inheritdoc}
*/
public function dgettext($domain, $original)
{
return $this->dpgettext($domain, null, $original);
}
/**
* @see TranslatorInterface
*
* {@inheritdoc}
*/
public function dpgettext($domain, $context, $original)
{
$translation = $this->getTranslation($domain, $context, $original);
if (isset($translation[0]) && $translation[0] !== '') {
return $translation[0];
}
return $original;
}
/**
* @see TranslatorInterface
*
* {@inheritdoc}
*/
public function dnpgettext($domain, $context, $original, $plural, $value)
{
$translation = $this->getTranslation($domain, $context, $original);
$key = $this->getPluralIndex($domain, $value, $translation === false);
if (isset($translation[$key]) && $translation[$key] !== '') {
return $translation[$key];
}
return ($key === 0) ? $original : $plural;
}
/**
* Set new translations to the dictionary.
*
* @param array $translations
*/
protected function addTranslations(array $translations)
{
$domain = isset($translations['domain']) ? $translations['domain'] : '';
//Set the first domain loaded as default domain
if ($this->domain === null) {
$this->domain = $domain;
}
if (isset($this->dictionary[$domain])) {
$this->dictionary[$domain] = array_replace_recursive($this->dictionary[$domain], $translations['messages']);
return;
}
if (!empty($translations['plural-forms'])) {
list($count, $code) = array_map('trim', explode(';', $translations['plural-forms'], 2));
// extract just the expression turn 'n' into a php variable '$n'.
// Slap on a return keyword and semicolon at the end.
$this->plurals[$domain] = [
'count' => (int) str_replace('nplurals=', '', $count),
'code' => str_replace('plural=', 'return ', str_replace('n', '$n', $code)).';',
];
}
$this->dictionary[$domain] = $translations['messages'];
}
/**
* Search and returns a translation.
*
* @param string $domain
* @param string $context
* @param string $original
*
* @return string|false
*/
protected function getTranslation($domain, $context, $original)
{
return isset($this->dictionary[$domain][$context][$original])
? $this->dictionary[$domain][$context][$original]
: false;
}
/**
* Executes the plural decision code given the number to decide which
* plural version to take.
*
* @param string $domain
* @param string $n
* @param bool $fallback set to true to get fallback plural index
*
* @return int
*/
protected function getPluralIndex($domain, $n, $fallback)
{
//Not loaded domain or translation, use a fallback
if (!isset($this->plurals[$domain]) || $fallback === true) {
return $n == 1 ? 0 : 1;
}
if (!isset($this->plurals[$domain]['function'])) {
$code = self::fixTerseIfs($this->plurals[$domain]['code']);
$this->plurals[$domain]['function'] = eval("return function (\$n) { $code };");
}
if ($this->plurals[$domain]['count'] <= 2) {
return call_user_func($this->plurals[$domain]['function'], $n) ? 1 : 0;
}
return call_user_func($this->plurals[$domain]['function'], $n);
}
/**
* This function will recursively wrap failure states in brackets if they contain a nested terse if.
*
* This because PHP can not handle nested terse if's unless they are wrapped in brackets.
*
* This code probably only works for the gettext plural decision codes.
*
* return ($n==1 ? 0 : $n%10>=2 && $n%10<=4 && ($n%100<10 || $n%100>=20) ? 1 : 2);
* becomes
* return ($n==1 ? 0 : ($n%10>=2 && $n%10<=4 && ($n%100<10 || $n%100>=20) ? 1 : 2));
*
* @param string $code the terse if string
* @param bool $inner If inner is true we wrap it in brackets
*
* @return string A formatted terse If that PHP can work with.
*/
private static function fixTerseIfs($code, $inner = false)
{
/*
* (?P<expression>[^?]+) Capture everything up to ? as 'expression'
* \? ?
* (?P<success>[^:]+) Capture everything up to : as 'success'
* : :
* (?P<failure>[^;]+) Capture everything up to ; as 'failure'
*/
preg_match('/(?P<expression>[^?]+)\?(?P<success>[^:]+):(?P<failure>[^;]+)/', $code, $matches);
// If no match was found then no terse if was present
if (!isset($matches[0])) {
return $code;
}
$expression = $matches['expression'];
$success = $matches['success'];
$failure = $matches['failure'];
// Go look for another terse if in the failure state.
$failure = self::fixTerseIfs($failure, true);
$code = $expression.' ? '.$success.' : '.$failure;
if ($inner) {
return "($code)";
}
// note the semicolon. We need that for executing the code.
return "$code;";
}
}
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