Replaced gettext translation with package

This allows to check if no translation is available

4 files changed, 143 insertions, 49 deletions

diff --git a/src/Helpers/Translation/GettextTranslator.php b/src/Helpers/Translation/GettextTranslator.php
new file mode 100644
index 00000000..7f2299e2
--- /dev/null
+++ b/src/Helpers/Translation/GettextTranslator.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace Engelsystem\Helpers\Translation;
+
+use Gettext\Translator;
+
+class GettextTranslator extends Translator
+{
+    /**
+     * @param string $domain
+     * @param string $context
+     * @param string $original
+     * @return string
+     * @throws TranslationNotFound
+     */
+    public function dpgettext($domain, $context, $original)
+    {
+        $this->assertHasTranslation($domain, $context, $original);
+
+        return parent::dpgettext($domain, $context, $original);
+    }
+
+    /**
+     * @param string $domain
+     * @param string $context
+     * @param string $original
+     * @param string $plural
+     * @param string $value
+     * @return string
+     * @throws TranslationNotFound
+     */
+    public function dnpgettext($domain, $context, $original, $plural, $value)
+    {
+        $this->assertHasTranslation($domain, $context, $original);
+
+        return parent::dnpgettext($domain, $context, $original, $plural, $value);
+    }
+
+    /**
+     * @param string $domain
+     * @param string $context
+     * @param string $original
+     * @throws TranslationNotFound
+     */
+    protected function assertHasTranslation($domain, $context, $original)
+    {
+        if ($this->getTranslation($domain, $context, $original)) {
+            return;
+        }
+
+        throw new TranslationNotFound(implode('/', [$domain, $context, $original]));
+    }
+}
diff --git a/src/Helpers/Translation/TranslationNotFound.php b/src/Helpers/Translation/TranslationNotFound.php
new file mode 100644
index 00000000..1552838b
--- /dev/null
+++ b/src/Helpers/Translation/TranslationNotFound.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace Engelsystem\Helpers\Translation;
+
+use Exception;
+
+class TranslationNotFound extends Exception
+{
+}
diff --git a/src/Helpers/Translation/TranslationServiceProvider.php b/src/Helpers/Translation/TranslationServiceProvider.php
index d0cda6a8..09337dad 100644
--- a/src/Helpers/Translation/TranslationServiceProvider.php
+++ b/src/Helpers/Translation/TranslationServiceProvider.php
@@ -4,11 +4,15 @@ namespace Engelsystem\Helpers\Translation;
 
 use Engelsystem\Config\Config;
 use Engelsystem\Container\ServiceProvider;
+use Gettext\Translations;
 use Symfony\Component\HttpFoundation\Session\Session;
 
 class TranslationServiceProvider extends ServiceProvider
 {
-    public function register()
+    /** @var GettextTranslator */
+    protected $translators = [];
+
+    public function register(): void
     {
         /** @var Config $config */
         $config = $this->app->get('config');
@@ -17,41 +21,36 @@ class TranslationServiceProvider extends ServiceProvider
 
         $locales = $config->get('locales');
         $locale = $config->get('default_locale');
+        $fallbackLocale = $config->get('fallback_locale', 'en_US');
 
         $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']]
+            [
+                'locale'                => $locale,
+                'locales'               => $locales,
+                'fallbackLocale'        => $fallbackLocale,
+                'getTranslatorCallback' => [$this, 'getTranslator'],
+                '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)
+    public function setLocale(string $locale): void
     {
+        $locale .= '.UTF-8';
         // Set the users locale
         putenv('LC_ALL=' . $locale);
         setlocale(LC_ALL, $locale);
@@ -60,4 +59,28 @@ class TranslationServiceProvider extends ServiceProvider
         putenv('LC_NUMERIC=C');
         setlocale(LC_NUMERIC, 'C');
     }
+
+    /**
+     * @param string $locale
+     * @return GettextTranslator
+     */
+    public function getTranslator(string $locale): GettextTranslator
+    {
+        if (!isset($this->translators[$locale])) {
+            $file = $this->app->get('path.lang') . '/' . $locale . '/default.mo';
+
+            /** @var GettextTranslator $translator */
+            $translator = $this->app->make(GettextTranslator::class);
+
+            /** @var Translations $translations */
+            $translations = $this->app->make(Translations::class);
+            $translations->addFromMoFile($file);
+
+            $translator->loadTranslations($translations);
+
+            $this->translators[$locale] = $translator;
+        }
+
+        return $this->translators[$locale];
+    }
 }
diff --git a/src/Helpers/Translation/Translator.php b/src/Helpers/Translation/Translator.php
index 545963eb..8b11ecb4 100644
--- a/src/Helpers/Translation/Translator.php
+++ b/src/Helpers/Translation/Translator.php
@@ -10,6 +10,12 @@ class Translator
     /** @var string */
     protected $locale;
 
+    /** @var string */
+    protected $fallbackLocale;
+
+    /** @var callable */
+    protected $getTranslatorCallback;
+
     /** @var callable */
     protected $localeChangeCallback;
 
@@ -17,15 +23,24 @@ class Translator
      * Translator constructor.
      *
      * @param string   $locale
+     * @param string   $fallbackLocale
+     * @param callable $getTranslatorCallback
      * @param string[] $locales
      * @param callable $localeChangeCallback
      */
-    public function __construct(string $locale, array $locales = [], callable $localeChangeCallback = null)
-    {
+    public function __construct(
+        string $locale,
+        string $fallbackLocale,
+        callable $getTranslatorCallback,
+        array $locales = [],
+        callable $localeChangeCallback = null
+    ) {
         $this->localeChangeCallback = $localeChangeCallback;
+        $this->getTranslatorCallback = $getTranslatorCallback;
 
         $this->setLocale($locale);
-        $this->setLocales($locales);
+        $this->fallbackLocale = $fallbackLocale;
+        $this->locales = $locales;
     }
 
     /**
@@ -37,9 +52,7 @@ class Translator
      */
     public function translate(string $key, array $replace = []): string
     {
-        $translated = $this->translateGettext($key);
-
-        return $this->replaceText($translated, $replace);
+        return $this->translateText('gettext', [$key], $replace);
     }
 
     /**
@@ -53,7 +66,29 @@ class Translator
      */
     public function translatePlural(string $key, string $pluralKey, int $number, array $replace = []): string
     {
-        $translated = $this->translateGettextPlural($key, $pluralKey, $number);
+        return $this->translateText('ngettext', [$key, $pluralKey, $number], $replace);
+    }
+
+    /**
+     * @param string $type
+     * @param array  $parameters
+     * @param array  $replace
+     * @return mixed|string
+     */
+    protected function translateText(string $type, array $parameters, array $replace = [])
+    {
+        $translated = $parameters[0];
+
+        foreach ([$this->locale, $this->fallbackLocale] as $lang) {
+            /** @var GettextTranslator $translator */
+            $translator = call_user_func($this->getTranslatorCallback, $lang);
+
+            try {
+                $translated = call_user_func_array([$translator, $type], $parameters);
+                break;
+            } catch (TranslationNotFound $e) {
+            }
+        }
 
         return $this->replaceText($translated, $replace);
     }
@@ -75,32 +110,6 @@ class Translator
     }
 
     /**
-     * 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