seed available sets

backend/database/seeders/DatabaseSeeder.php

@@ -12,5 +12,6 @@ class DatabaseSeeder extends Seeder
     public function run(): void
     {
         $this->call(UserSeeder::class);
+        $this->call(SetSeeder::class);
     }
 }

backend/database/seeders/SetSeeder.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace Database\Seeders;
+
+use App\Set\CreateSetDto;
+use App\Set\SetRepository;
+use App\Shared\ValueObject\EmailAddress;
+use App\User\UserRepository;
+use Illuminate\Database\Seeder;
+use RuntimeException;
+
+class SetSeeder extends Seeder
+{
+    private const array NAMES = [
+        'Bible',
+        'Course',
+        'Fitness Program',
+    ];
+
+    public function run(): void
+    {
+        $user = app(UserRepository::class)->findByEmail(
+            new EmailAddress(UserSeeder::EMAIL),
+        );
+        if ($user === null) {
+            throw new RuntimeException('seeded user not found');
+        }
+
+        $repository = app(SetRepository::class);
+        $existingNames = array_map(function ($set): string {
+            return $set->getName();
+        }, $repository->all());
+
+        foreach (self::NAMES as $name) {
+            if (in_array($name, $existingNames, true)) {
+                continue;
+            }
+
+            $repository->create(new CreateSetDto(
+                name: $name,
+                creator: $user,
+            ));
+        }
+    }
+}