TRF Certest first commit

app/Repositories/Country/CountryRepository.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Vanguard\Repositories\Country;
+
+use Illuminate\Database\Eloquent\Collection as EloquentCollection;
+use Illuminate\Support\Collection;
+use Vanguard\Country;
+
+interface CountryRepository
+{
+    /**
+     * Create $key => $value array for all available countries.
+     */
+    public function lists(string $column = 'name', string $key = 'id'): Collection;
+
+    /**
+     * Get all available countries.
+     *
+     * @return EloquentCollection<Country>
+     */
+    public function all(): EloquentCollection;
+}

app/Repositories/Country/EloquentCountry.php

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+<?php
+
+namespace Vanguard\Repositories\Country;
+
+use Illuminate\Database\Eloquent\Collection as EloquentCollection;
+use Illuminate\Support\Collection;
+use Vanguard\Country;
+
+class EloquentCountry implements CountryRepository
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function lists($column = 'name', $key = 'id'): Collection
+    {
+        return Country::orderBy('name')->pluck($column, $key);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function all(): EloquentCollection
+    {
+        return Country::all();
+    }
+}