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<?php
namespace Illuminate\Translation;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
use Illuminate\Support\Collection;
use Illuminate\Support\NamespacedItemResolver;
use Symfony\Component\Translation\MessageSelector;
use Symfony\Component\Translation\TranslatorInterface;
class Translator extends NamespacedItemResolver implements TranslatorInterface
{
/**
* The loader implementation.
*
* @var \Illuminate\Translation\LoaderInterface
*/
protected $loader;
/**
* The default locale being used by the translator.
*
* @var string
*/
protected $locale;
/**
* The fallback locale used by the translator.
*
* @var string
*/
protected $fallback;
/**
* The array of loaded translation groups.
*
* @var array
*/
protected $loaded = [];
/**
* The message selector.
*
* @var \Symfony\Component\Translation\MessageSelector
*/
protected $selector;
/**
* Create a new translator instance.
*
* @param \Illuminate\Translation\LoaderInterface $loader
* @param string $locale
* @return void
*/
public function __construct(LoaderInterface $loader, $locale)
{
$this->loader = $loader;
$this->locale = $locale;
}
/**
* Determine if a translation exists for a given locale.
*
* @param string $key
* @param string|null $locale
* @return bool
*/
public function hasForLocale($key, $locale = null)
{
return $this->has($key, $locale, false);
}
/**
* Determine if a translation exists.
*
* @param string $key
* @param string|null $locale
* @param bool $fallback
* @return bool
*/
public function has($key, $locale = null, $fallback = true)
{
return $this->get($key, [], $locale, $fallback) !== $key;
}
/**
* Get the translation for the given key.
*
* @param string $key
* @param array $replace
* @param string|null $locale
* @param bool $fallback
* @return string|array|null
*/
public function get($key, array $replace = [], $locale = null, $fallback = true)
{
list($namespace, $group, $item) = $this->parseKey($key);
// Here we will get the locale that should be used for the language line. If one
// was not passed, we will use the default locales which was given to us when
// the translator was instantiated. Then, we can load the lines and return.
$locales = $fallback ? $this->parseLocale($locale) : [$locale ?: $this->locale];
foreach ($locales as $locale) {
$this->load($namespace, $group, $locale);
$line = $this->getLine(
$namespace, $group, $locale, $item, $replace
);
if (! is_null($line)) {
break;
}
}
// If the line doesn't exist, we will return back the key which was requested as
// that will be quick to spot in the UI if language keys are wrong or missing
// from the application's language files. Otherwise we can return the line.
if (! isset($line)) {
return $key;
}
return $line;
}
/**
* Retrieve a language line out the loaded array.
*
* @param string $namespace
* @param string $group
* @param string $locale
* @param string $item
* @param array $replace
* @return string|array|null
*/
protected function getLine($namespace, $group, $locale, $item, array $replace)
{
$line = Arr::get($this->loaded[$namespace][$group][$locale], $item);
if (is_string($line)) {
return $this->makeReplacements($line, $replace);
} elseif (is_array($line) && count($line) > 0) {
return $line;
}
}
/**
* Make the place-holder replacements on a line.
*
* @param string $line
* @param array $replace
* @return string
*/
protected function makeReplacements($line, array $replace)
{
$replace = $this->sortReplacements($replace);
foreach ($replace as $key => $value) {
$line = str_replace(
[':'.$key, ':'.Str::upper($key), ':'.Str::ucfirst($key)],
[$value, Str::upper($value), Str::ucfirst($value)],
$line
);
}
return $line;
}
/**
* Sort the replacements array.
*
* @param array $replace
* @return array
*/
protected function sortReplacements(array $replace)
{
return (new Collection($replace))->sortBy(function ($value, $key) {
return mb_strlen($key) * -1;
});
}
/**
* Get a translation according to an integer value.
*
* @param string $key
* @param int|array|\Countable $number
* @param array $replace
* @param string $locale
* @return string
*/
public function choice($key, $number, array $replace = [], $locale = null)
{
$line = $this->get($key, $replace, $locale = $locale ?: $this->locale ?: $this->fallback);
if (is_array($number) || $number instanceof \Countable) {
$number = count($number);
}
$replace['count'] = $number;
return $this->makeReplacements($this->getSelector()->choose($line, $number, $locale), $replace);
}
/**
* Get the translation for a given key.
*
* @param string $id
* @param array $parameters
* @param string $domain
* @param string $locale
* @return string|array|null
*/
public function trans($id, array $parameters = [], $domain = 'messages', $locale = null)
{
return $this->get($id, $parameters, $locale);
}
/**
* Get a translation according to an integer value.
*
* @param string $id
* @param int|array|\Countable $number
* @param array $parameters
* @param string $domain
* @param string $locale
* @return string
*/
public function transChoice($id, $number, array $parameters = [], $domain = 'messages', $locale = null)
{
return $this->choice($id, $number, $parameters, $locale);
}
/**
* Load the specified language group.
*
* @param string $namespace
* @param string $group
* @param string $locale
* @return void
*/
public function load($namespace, $group, $locale)
{
if ($this->isLoaded($namespace, $group, $locale)) {
return;
}
// The loader is responsible for returning the array of language lines for the
// given namespace, group, and locale. We'll set the lines in this array of
// lines that have already been loaded so that we can easily access them.
$lines = $this->loader->load($locale, $group, $namespace);
$this->loaded[$namespace][$group][$locale] = $lines;
}
/**
* Determine if the given group has been loaded.
*
* @param string $namespace
* @param string $group
* @param string $locale
* @return bool
*/
protected function isLoaded($namespace, $group, $locale)
{
return isset($this->loaded[$namespace][$group][$locale]);
}
/**
* Add a new namespace to the loader.
*
* @param string $namespace
* @param string $hint
* @return void
*/
public function addNamespace($namespace, $hint)
{
$this->loader->addNamespace($namespace, $hint);
}
/**
* Parse a key into namespace, group, and item.
*
* @param string $key
* @return array
*/
public function parseKey($key)
{
$segments = parent::parseKey($key);
if (is_null($segments[0])) {
$segments[0] = '*';
}
return $segments;
}
/**
* Get the array of locales to be checked.
*
* @param string|null $locale
* @return array
*/
protected function parseLocale($locale)
{
return array_filter([$locale ?: $this->locale, $this->fallback]);
}
/**
* Get the message selector instance.
*
* @return \Symfony\Component\Translation\MessageSelector
*/
public function getSelector()
{
if (! isset($this->selector)) {
$this->selector = new MessageSelector;
}
return $this->selector;
}
/**
* Set the message selector instance.
*
* @param \Symfony\Component\Translation\MessageSelector $selector
* @return void
*/
public function setSelector(MessageSelector $selector)
{
$this->selector = $selector;
}
/**
* Get the language line loader implementation.
*
* @return \Illuminate\Translation\LoaderInterface
*/
public function getLoader()
{
return $this->loader;
}
/**
* Get the default locale being used.
*
* @return string
*/
public function locale()
{
return $this->getLocale();
}
/**
* Get the default locale being used.
*
* @return string
*/
public function getLocale()
{
return $this->locale;
}
/**
* Set the default locale.
*
* @param string $locale
* @return void
*/
public function setLocale($locale)
{
$this->locale = $locale;
}
/**
* Get the fallback locale being used.
*
* @return string
*/
public function getFallback()
{
return $this->fallback;
}
/**
* Set the fallback locale being used.
*
* @param string $fallback
* @return void
*/
public function setFallback($fallback)
{
$this->fallback = $fallback;
}
}