<?php
namespace Illuminate\Translation;
use Closure;
use Illuminate\Contracts\Translation\Loader;
use Illuminate\Contracts\Translation\Translator as TranslatorContract;
use Illuminate\Support\Arr;
use Illuminate\Support\NamespacedItemResolver;
use Illuminate\Support\Str;
use Illuminate\Support\Traits\Macroable;
use Illuminate\Support\Traits\ReflectsClosures;
use InvalidArgumentException;
class Translator extends NamespacedItemResolver implements TranslatorContract
{
use Macroable, ReflectsClosures;
/**
* The loader implementation.
*
* @var \Illuminate\Contracts\Translation\Loader
*/
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 \Illuminate\Translation\MessageSelector
*/
protected $selector;
/**
* The callable that should be invoked to determine applicable locales.
*
* @var callable
*/
protected $determineLocalesUsing;
/**
* The custom rendering callbacks for stringable objects.
*
* @var array
*/
protected $stringableHandlers = [];
/**
* Create a new translator instance.
*
* @param \Illuminate\Contracts\Translation\Loader $loader
* @param string $locale
* @return void
*/
public function __construct(Loader $loader, $locale)
{
$this->loader = $loader;
$this->setLocale($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)
{
$locale = $locale ?: $this->locale;
$line = $this->get($key, [], $locale, $fallback);
// For JSON translations, the loaded files will contain the correct line.
// Otherwise, we must assume we are handling typical translation file
// and check if the returned line is not the same as the given key.
if (! is_null($this->loaded['*']['*'][$locale][$key] ?? null)) {
return true;
}
return $line !== $key;
}
/**
* Get the translation for the given key.
*
* @param string $key
* @param array $replace
* @param string|null $locale
* @param bool $fallback
* @return string|array
*/
public function get($key, array $replace = [], $locale = null, $fallback = true)
{
$locale = $locale ?: $this->locale;
// For JSON translations, there is only one file per locale, so we will simply load
// that file and then we will be ready to check the array for the key. These are
// only one level deep so we do not need to do any fancy searching through it.
$this->load('*', '*', $locale);
$line = $this->loaded['*']['*'][$locale][$key] ?? null;
// If we can't find a translation for the JSON key, we will attempt to translate it
// using the typical translation file. This way developers can always just use a
// helper such as __ instead of having to pick between trans or __ with views.
if (! isset($line)) {
[$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 ? $this->localeArray($locale) : [$locale];
foreach ($locales as $locale) {
if (! is_null($line = $this->getLine(
$namespace, $group, $locale, $item, $replace
))) {
return $line;
}
}
}
// 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.
return $this->makeReplacements($line ?: $key, $replace);
}
/**
* Get a translation according to an integer value.
*
* @param string $key
* @param \Countable|int|array $number
* @param array $replace
* @param string|null $locale
* @return string
*/
public function choice($key, $number, array $replace = [], $locale = null)
{
$line = $this->get(
$key, $replace, $locale = $this->localeForChoice($locale)
);
// If the given "number" is actually an array or countable we will simply count the
// number of elements in an instance. This allows developers to pass an array of
// items without having to count it on their end first which gives bad syntax.
if (is_countable($number)) {
$number = count($number);
}
$replace['count'] = $number;
return $this->makeReplacements(
$this->getSelector()->choose($line, $number, $locale), $replace
);
}
/**
* Get the proper locale for a choice operation.
*
* @param string|null $locale
* @return string
*/
protected function localeForChoice($locale)
{
return $locale ?: $this->locale ?: $this->fallback;
}
/**
* 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)
{
$this->load($namespace, $group, $locale);
$line = Arr::get($this->loaded[$namespace][$group][$locale], $item);
if (is_string($line)) {
return $this->makeReplacements($line, $replace);
} elseif (is_array($line) && count($line) > 0) {
array_walk_recursive($line, function (&$value, $key) use ($replace) {
$value = $this->makeReplacements($value, $replace);
});
return $line;
}
}
/**
* Make the place-holder replacements on a line.
*
* @param string $line
* @param array $replace
* @return string
*/
protected function makeReplacements($line, array $replace)
{
if (empty($replace)) {
return $line;
}
$shouldReplace = [];
foreach ($replace as $key => $value) {
if (is_object($value) && isset($this->stringableHandlers[get_class($value)])) {
$value = call_user_func($this->stringableHandlers[get_class($value)], $value);
}
$shouldReplace[':'.Str::ucfirst($key ?? '')] = Str::ucfirst($value ?? '');
$shouldReplace[':'.Str::upper($key ?? '')] = Str::upper($value ?? '');
$shouldReplace[':'.$key] = $value;
}
return strtr($line, $shouldReplace);
}
/**
* Add translation lines to the given locale.
*
* @param array $lines
* @param string $locale
* @param string $namespace
* @return void
*/
public function addLines(array $lines, $locale, $namespace = '*')
{
foreach ($lines as $key => $value) {
[$group, $item] = explode('.', $key, 2);
Arr::set($this->loaded, "$namespace.$group.$locale.$item", $value);
}
}
/**
* 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);
}
/**
* Add a new JSON path to the loader.
*
* @param string $path
* @return void
*/
public function addJsonPath($path)
{
$this->loader->addJsonPath($path);
}
/**
* 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 $locale
* @return array
*/
protected function localeArray($locale)
{
$locales = array_filter([$locale ?: $this->locale, $this->fallback]);
return call_user_func($this->determineLocalesUsing ?: fn () => $locales, $locales);
}
/**
* Specify a callback that should be invoked to determined the applicable locale array.
*
* @param callable $callback
* @return void
*/
public function determineLocalesUsing($callback)
{
$this->determineLocalesUsing = $callback;
}
/**
* Get the message selector instance.
*
* @return \Illuminate\Translation\MessageSelector
*/
public function getSelector()
{
if (! isset($this->selector)) {
$this->selector = new MessageSelector;
}
return $this->selector;
}
/**
* Set the message selector instance.
*
* @param \Illuminate\Translation\MessageSelector $selector
* @return void
*/
public function setSelector(MessageSelector $selector)
{
$this->selector = $selector;
}
/**
* Get the language line loader implementation.
*
* @return \Illuminate\Contracts\Translation\Loader
*/
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 $locale
* @return void
*
* @throws \InvalidArgumentException
*/
public function setLocale($locale)
{
if (Str::contains($locale, ['/', '\\'])) {
throw new InvalidArgumentException('Invalid characters present in 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;
}
/**
* Set the loaded translation groups.
*
* @param array $loaded
* @return void
*/
public function setLoaded(array $loaded)
{
$this->loaded = $loaded;
}
/**
* Add a handler to be executed in order to format a given class to a string during translation replacements.
*
* @param callable|string $class
* @param callable|null $handler
* @return void
*/
public function stringable($class, $handler = null)
{
if ($class instanceof Closure) {
[$class, $handler] = [
$this->firstClosureParameterType($class),
$class,
];
}
$this->stringableHandlers[$class] = $handler;
}
}
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