huge Laravel 10 upgrade

support/laravel-translation/src/Rules/LanguageNotExists.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace JoeDixon\Translation\Rules;
+
+use Illuminate\Contracts\Validation\Rule;
+use JoeDixon\Translation\Drivers\Translation;
+
+class LanguageNotExists implements Rule
+{
+    /**
+     * Determine if the validation rule passes.
+     *
+     * @param  string  $attribute
+     * @param  mixed  $value
+     * @return bool
+     */
+    public function passes($attribute, $value)
+    {
+        $translation = app()->make(Translation::class);
+
+        return ! $translation->languageExists($value);
+    }
+
+    /**
+     * Get the validation error message.
+     *
+     * @return string
+     */
+    public function message()
+    {
+        return __('translation::translation.language_exists');
+    }
+}