introduce "inventory" query

Mimir/GraphQL/TypeExtensions/InventoryTypeExtension.cs

@@ -0,0 +1,46 @@
+using Lib9c.GraphQL.Objects;
+using Lib9c.GraphQL.Types;
+using Libplanet.Crypto;
+using Mimir.GraphQL.Factories;
+using Mimir.GraphQL.Queries;
+using Mimir.Repositories;
+
+namespace Mimir.GraphQL.TypeExtensions;
+
+public class InventoryTypeExtension : ObjectTypeExtension<Query>
+{
+    protected override void Configure(IObjectTypeDescriptor<Query> descriptor)
+    {
+        descriptor
+            .Field("inventory")
+            .Argument("planetName", a => a.Type<NonNullType<PlanetNameEnumType>>())
+            .Argument("avatarAddress", a => a.Type<NonNullType<AddressType>>())
+            .Type<InventoryType>()
+            .ResolveWith<InventoryTypeExtension>(_ => GetInventory(
+                default!,
+                default!,
+                default!));
+    }
+
+    private static InventoryObject? GetInventory(
+        string planetName,
+        Address avatarAddress,
+        [Service] AvatarRepository avatarRepository)
+    {
+        var inventory = avatarRepository.GetInventory(planetName, avatarAddress);
+        if (inventory is null)
+        {
+            return null;
+        }
+
+        var consumables = inventory.Consumables.Select(ItemObjectFactory.Create).ToArray();
+        var costumes = inventory.Costumes.Select(ItemObjectFactory.Create).ToArray();
+        var equipments = inventory.Equipments.Select(ItemObjectFactory.Create).ToArray();
+        var materials = inventory.Materials.Select(ItemObjectFactory.Create).ToArray();
+        return new InventoryObject(
+            consumables,
+            costumes,
+            equipments,
+            materials);
+    }
+}