2 files changed, 210 insertions, 0 deletions
diff --git a/src/Helpers/Translation/TranslationServiceProvider.php b/src/Helpers/Translation/TranslationServiceProvider.php
new file mode 100644
index 00000000..d0cda6a8
--- /dev/null
+++ b/src/Helpers/Translation/TranslationServiceProvider.php
@@ -0,0 +1,63 @@
+<?php
+
+namespace Engelsystem\Helpers\Translation;
+
+use Engelsystem\Config\Config;
+use Engelsystem\Container\ServiceProvider;
+use Symfony\Component\HttpFoundation\Session\Session;
+
+class TranslationServiceProvider extends ServiceProvider
+{
+    public function register()
+    {
+        /** @var Config $config */
+        $config = $this->app->get('config');
+        /** @var Session $session */
+        $session = $this->app->get('session');
+
+        $locales = $config->get('locales');
+        $locale = $config->get('default_locale');
+
+        $sessionLocale = $session->get('locale', $locale);
+        if (isset($locales[$sessionLocale])) {
+            $locale = $sessionLocale;
+        }
+
+        $this->initGettext();
+        $session->set('locale', $locale);
+
+        $translator = $this->app->make(
+            Translator::class,
+            ['locale' => $locale, 'locales' => $locales, 'localeChangeCallback' => [$this, 'setLocale']]
+        );
+        $this->app->instance(Translator::class, $translator);
+        $this->app->instance('translator', $translator);
+    }
+
+    /**
+     * @param string $textDomain
+     * @param string $encoding
+     * @codeCoverageIgnore
+     */
+    protected function initGettext($textDomain = 'default', $encoding = 'UTF-8')
+    {
+        bindtextdomain($textDomain, $this->app->get('path.lang'));
+        bind_textdomain_codeset($textDomain, $encoding);
+        textdomain($textDomain);
+    }
+
+    /**
+     * @param string $locale
+     * @codeCoverageIgnore
+     */
+    public function setLocale($locale)
+    {
+        // Set the users locale
+        putenv('LC_ALL=' . $locale);
+        setlocale(LC_ALL, $locale);
+
+        // Reset numeric formatting to allow output of floats
+        putenv('LC_NUMERIC=C');
+        setlocale(LC_NUMERIC, 'C');
+    }
+}
diff --git a/src/Helpers/Translation/Translator.php b/src/Helpers/Translation/Translator.php
new file mode 100644
index 00000000..545963eb
--- /dev/null
+++ b/src/Helpers/Translation/Translator.php
@@ -0,0 +1,147 @@
+<?php
+
+namespace Engelsystem\Helpers\Translation;
+
+class Translator
+{
+    /** @var string[] */
+    protected $locales;
+
+    /** @var string */
+    protected $locale;
+
+    /** @var callable */
+    protected $localeChangeCallback;
+
+    /**
+     * Translator constructor.
+     *
+     * @param string   $locale
+     * @param string[] $locales
+     * @param callable $localeChangeCallback
+     */
+    public function __construct(string $locale, array $locales = [], callable $localeChangeCallback = null)
+    {
+        $this->localeChangeCallback = $localeChangeCallback;
+
+        $this->setLocale($locale);
+        $this->setLocales($locales);
+    }
+
+    /**
+     * Get the translation for a given key
+     *
+     * @param string $key
+     * @param array  $replace
+     * @return string
+     */
+    public function translate(string $key, array $replace = []): string
+    {
+        $translated = $this->translateGettext($key);
+
+        return $this->replaceText($translated, $replace);
+    }
+
+    /**
+     * Get the translation for a given key
+     *
+     * @param string $key
+     * @param string $pluralKey
+     * @param int    $number
+     * @param array  $replace
+     * @return string
+     */
+    public function translatePlural(string $key, string $pluralKey, int $number, array $replace = []): string
+    {
+        $translated = $this->translateGettextPlural($key, $pluralKey, $number);
+
+        return $this->replaceText($translated, $replace);
+    }
+
+    /**
+     * Replace placeholders
+     *
+     * @param string $key
+     * @param array  $replace
+     * @return mixed|string
+     */
+    protected function replaceText(string $key, array $replace = [])
+    {
+        if (empty($replace)) {
+            return $key;
+        }
+
+        return call_user_func_array('sprintf', array_merge([$key], $replace));
+    }
+
+    /**
+     * Translate the key via gettext
+     *
+     * @param string $key
+     * @return string
+     * @codeCoverageIgnore
+     */
+    protected function translateGettext(string $key): string
+    {
+        return gettext($key);
+    }
+
+    /**
+     * Translate the key via gettext
+     *
+     * @param string $key
+     * @param string $keyPlural
+     * @param int    $number
+     * @return string
+     * @codeCoverageIgnore
+     */
+    protected function translateGettextPlural(string $key, string $keyPlural, int $number): string
+    {
+        return ngettext($key, $keyPlural, $number);
+    }
+
+    /**
+     * @return string
+     */
+    public function getLocale(): string
+    {
+        return $this->locale;
+    }
+
+    /**
+     * @param string $locale
+     */
+    public function setLocale(string $locale)
+    {
+        $this->locale = $locale;
+
+        if (is_callable($this->localeChangeCallback)) {
+            call_user_func_array($this->localeChangeCallback, [$locale]);
+        }
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getLocales(): array
+    {
+        return $this->locales;
+    }
+
+    /**
+     * @param string $locale
+     * @return bool
+     */
+    public function hasLocale(string $locale): bool
+    {
+        return isset($this->locales[$locale]);
+    }
+
+    /**
+     * @param string[] $locales
+     */
+    public function setLocales(array $locales)
+    {
+        $this->locales = $locales;
+    }
+}