add set elements

backend/app/Set/CreateSetDto.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Set;
+
+class CreateSetDto
+{
+    public function __construct(
+        public string $name,
+    ) {}
+}

backend/app/Set/EloquentSetRepository.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Set;
+
+class EloquentSetRepository implements SetRepository
+{
+    public function create(CreateSetDto $dto): Set
+    {
+        $model = SetModel::create([
+            'name' => $dto->name,
+        ]);
+
+        return $this->toDomain($model);
+    }
+
+    public function find(int $id): ?Set
+    {
+        $model = SetModel::find($id);
+
+        return $model === null ? null : $this->toDomain($model);
+    }
+
+    public function getAll(): array
+    {
+        $models = SetModel::orderBy('id')->get();
+        $sets = [];
+        foreach ($models as $model) {
+            $sets[] = $this->toDomain($model);
+        }
+
+        return $sets;
+    }
+
+    private function toDomain(SetModel $model): Set
+    {
+        return new Set(
+            id: $model->id,
+            name: $model->name,
+        );
+    }
+}

backend/app/Set/Set.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Set;
+
+class Set
+{
+    public function __construct(
+        private int $id,
+        private string $name,
+    ) {}
+
+    public function getId(): int
+    {
+        return $this->id;
+    }
+
+    public function getName(): string
+    {
+        return $this->name;
+    }
+}

backend/app/Set/SetModel.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Set;
+
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * @property int $id
+ * @property string $name
+ *
+ * @method static Builder<static>|SetModel newModelQuery()
+ * @method static Builder<static>|SetModel newQuery()
+ * @method static Builder<static>|SetModel query()
+ * @method static Builder<static>|SetModel whereId($value)
+ * @method static Builder<static>|SetModel whereName($value)
+ *
+ * @mixin \Eloquent
+ */
+class SetModel extends Model
+{
+    protected $table = 'sets';
+
+    public $timestamps = false;
+
+    protected $fillable = ['name'];
+}

backend/app/Set/SetRepository.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Set;
+
+interface SetRepository
+{
+    public function create(CreateSetDto $dto): Set;
+
+    public function find(int $id): ?Set;
+
+    /**
+     * @return Set[]
+     */
+    public function getAll(): array;
+}

backend/app/Set/UseCases/CreateSet/CreateSet.php

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+<?php
+
+namespace App\Set\UseCases\CreateSet;
+
+use App\Element\CreateElementDto;
+use App\Element\ElementRepository;
+use App\Exceptions\BadRequestException;
+use App\Set\CreateSetDto;
+use App\Set\Set;
+use App\Set\SetRepository;
+
+class CreateSet
+{
+    public function __construct(
+        private SetRepository $setRepo,
+        private ElementRepository $elementRepo,
+    ) {}
+
+    /**
+     * @throws BadRequestException
+     */
+    public function execute(CreateSetRequest $request): Set
+    {
+        if ($request->name === null || $request->name === '') {
+            throw new BadRequestException('name is required');
+        }
+
+        $set = $this->setRepo->create(new CreateSetDto(
+            name: $request->name,
+        ));
+
+        $this->elementRepo->create(new CreateElementDto(
+            set: $set,
+            title: $set->getName(),
+            parentElement: null,
+        ));
+
+        return $set;
+    }
+}

backend/app/Set/UseCases/CreateSet/CreateSetRequest.php

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+<?php
+
+namespace App\Set\UseCases\CreateSet;
+
+class CreateSetRequest
+{
+    public function __construct(
+        public ?string $name,
+    ) {}
+}