Add auto fallback feature

src/Translatable/Locales.php

@@ -95,6 +95,7 @@ public function load(): void
         foreach ($localesConfig as $key => $locale) {
             if (is_string($key) && is_array($locale)) {
                 $this->locales[$key] = $key;
+
                 foreach ($locale as $country) {
                     $countryLocale = $this->getCountryLocale($key, $country);
                     $this->locales[$countryLocale] = $countryLocale;

src/Translatable/Translatable.php

@@ -177,10 +177,12 @@ public function getTranslation(?string $locale = null, bool $withFallback = null
         if ($translation = $this->getTranslationByLocaleKey($locale)) {
             return $translation;
         }
+
         if ($withFallback && $fallbackLocale) {
             if ($translation = $this->getTranslationByLocaleKey($fallbackLocale)) {
                 return $translation;
             }
+
             if (
                 is_string($configFallbackLocale)
                 && $fallbackLocale !== $configFallbackLocale
@@ -190,6 +192,16 @@ public function getTranslation(?string $locale = null, bool $withFallback = null
             }
         }
 
+        if ($withFallback && $configFallbackLocale === null) {
+            $configuredLocales = $this->getLocalesHelper()->all();
+
+            foreach ($configuredLocales as $configuredLocale) {
+                if ($translation = $this->getTranslationByLocaleKey($configuredLocale)) {
+                    return $translation;
+                }
+            }
+        }
+
         return null;
     }
 

src/config/translatable.php

@@ -78,6 +78,10 @@
     | A fallback locale is the locale being used to return a translation
     | when the requested translation is not existing. To disable it
     | set it to false.
+    | If set to null it will loop through all configured locales until
+    | one existing is found or end of list reached. The locales are looped
+    | from top to bottom and for country based locales the simple one
+    | is used first. So "es" will be checked before "es_MX".
     |
     */
     'fallback_locale' => 'en',

tests/TranslatableTest.php

@@ -1,5 +1,6 @@
 <?php
 
+use Astrotomic\Translatable\Locales;
 use Astrotomic\Translatable\Test\Model\Food;
 use Astrotomic\Translatable\Test\Model\Person;
 use Astrotomic\Translatable\Test\Model\Country;
@@ -851,4 +852,70 @@ public function test_can_fill_conflicting_attribute_locale()
         $this->assertEquals('id:my city', $city->getTranslation('id', false)->name);
         $this->assertEquals('en:my city', $city->getTranslation('en', false)->name);
     }
+
+    public function test_it_returns_first_existing_translation_as_fallback()
+    {
+        /** @var Locales $helper */
+        $helper = $this->app->make(Locales::class);
+
+        $this->app->make('config')->set('translatable.locales', [
+            'xyz',
+            'en',
+            'de' => [
+                'DE',
+                'AT',
+            ],
+            'fr',
+            'el',
+        ]);
+        $this->app->make('config')->set('translatable.fallback_locale', null);
+        $this->app->make('config')->set('translatable.use_fallback', true);
+        $this->app->setLocale('xyz');
+        $helper->load();
+
+        CountryTranslation::create([
+            'country_id' => 1,
+            'locale' => $helper->getCountryLocale('de', 'DE'),
+            'name' => 'Griechenland',
+        ]);
+
+        /** @var Country $country */
+        $country = Country::find(1);
+        $this->assertNull($country->getTranslation(null, false));
+
+        // returns first existing locale
+        $translation = $country->getTranslation();
+        $this->assertInstanceOf(CountryTranslation::class, $translation);
+        $this->assertEquals('en', $translation->locale);
+
+        // still returns simple locale for country based locale
+        $translation = $country->getTranslation($helper->getCountryLocale('de', 'AT'));
+        $this->assertInstanceOf(CountryTranslation::class, $translation);
+        $this->assertEquals('de', $translation->locale);
+
+        $this->app->make('config')->set('translatable.locales', [
+            'xyz',
+            'de' => [
+                'DE',
+                'AT',
+            ],
+            'en',
+            'fr',
+            'el',
+        ]);
+        $helper->load();
+
+        // returns simple locale before country based locale
+        $translation = $country->getTranslation();
+        $this->assertInstanceOf(CountryTranslation::class, $translation);
+        $this->assertEquals('de', $translation->locale);
+
+        $country->translations()->where('locale', 'de')->delete();
+        $country->unsetRelation('translations');
+
+        // returns country based locale before next simple one
+        $translation = $country->getTranslation();
+        $this->assertInstanceOf(CountryTranslation::class, $translation);
+        $this->assertEquals($helper->getCountryLocale('de', 'DE'), $translation->locale);
+    }
 }

tests/models/CountryTranslation.php

@@ -8,5 +8,9 @@ class CountryTranslation extends Eloquent
 {
     public $timestamps = false;
 
-    protected $fillable = ['name'];
+    protected $fillable = [
+        'country_id',
+        'locale',
+        'name',
+    ];
 }