feat(sleeve): /sleeve/sleeve_list returns owned ids

SVSim.EmulatedEntrypoint/Controllers/SleeveController.cs

@@ -10,6 +10,7 @@ using SVSim.EmulatedEntrypoint.Models.Dtos;
 using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
 using SVSim.EmulatedEntrypoint.Models.Dtos.Requests.Sleeve;
 using SVSim.EmulatedEntrypoint.Models.Dtos.Responses.Sleeve;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Common;
 
 namespace SVSim.EmulatedEntrypoint.Controllers;
 
@@ -152,6 +153,22 @@ public class SleeveController : SVSimController
         };
     }
 
+    [HttpPost("sleeve_list")]
+    public async Task<ActionResult<List<SleeveListEntry>>> SleeveList(BaseRequest _, CancellationToken ct)
+    {
+        if (!TryGetViewerId(out long viewerId)) return Unauthorized();
+
+        var viewer = await _db.Viewers
+            .Include(v => v.Sleeves)
+            .FirstOrDefaultAsync(v => v.Id == viewerId, ct);
+        if (viewer is null) return Unauthorized();
+
+        return viewer.Sleeves
+            .Select(s => new SleeveListEntry { SleeveId = s.Id })
+            .OrderBy(e => e.SleeveId)
+            .ToList();
+    }
+
     /// <summary>
     /// A product is "purchased" once the viewer owns at least one of its sleeve-typed reward
     /// grants. Emblem/other grants aren't load-bearing for this check — a viewer who somehow

SVSim.EmulatedEntrypoint/Models/Dtos/Responses/Sleeve/SleeveListEntry.cs

@@ -0,0 +1,12 @@
+using MessagePack;
+using System.Text.Json.Serialization;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Responses.Sleeve;
+
+[MessagePackObject]
+public class SleeveListEntry
+{
+    [JsonPropertyName("sleeve_id")]
+    [Key("sleeve_id")]
+    public long SleeveId { get; set; }
+}

SVSim.UnitTests/Controllers/SleeveControllerListTests.cs

@@ -0,0 +1,54 @@
+using System.Net;
+using System.Text;
+using System.Text.Json;
+using NUnit.Framework;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+using SVSim.Database;
+using SVSim.Database.Models;
+using SVSim.UnitTests.Infrastructure;
+
+namespace SVSim.UnitTests.Controllers;
+
+public class SleeveControllerListTests
+{
+    [Test]
+    public async Task SleeveList_returns_owned_ids_wrapped()
+    {
+        using var factory = new SVSimTestFactory();
+        long viewerId = await factory.SeedViewerAsync(tutorialState: 0);
+
+        // Grant two sleeves directly. (Avoid the buy path — we want the test to
+        // only exercise the read.)
+        using (var scope = factory.Services.CreateScope())
+        {
+            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
+            var viewer = await db.Viewers.Include(v => v.Sleeves).FirstAsync(v => v.Id == viewerId);
+            // SleeveEntry is a globally-shared catalog row; reuse two ids that
+            // can plausibly exist or get created on the fly.
+            var s100 = await db.Set<SleeveEntry>().FirstOrDefaultAsync(s => s.Id == 100)
+                       ?? db.Set<SleeveEntry>().Add(new SleeveEntry { Id = 100 }).Entity;
+            var s101 = await db.Set<SleeveEntry>().FirstOrDefaultAsync(s => s.Id == 101)
+                       ?? db.Set<SleeveEntry>().Add(new SleeveEntry { Id = 101 }).Entity;
+            viewer.Sleeves.Add(s100);
+            viewer.Sleeves.Add(s101);
+            await db.SaveChangesAsync();
+        }
+
+        using var client = factory.CreateAuthenticatedClient(viewerId);
+        var requestJson = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""";
+        var response = await client.PostAsync("/sleeve/sleeve_list",
+            new StringContent(requestJson, Encoding.UTF8, "application/json"));
+
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+
+        var body = await response.Content.ReadAsStringAsync();
+        using var doc = JsonDocument.Parse(body);
+        var ids = doc.RootElement.EnumerateArray()
+            .Select(e => e.GetProperty("sleeve_id").GetInt64())
+            .ToHashSet();
+        // Viewer has a default sleeve from RegisterViewer; just assert our two grants are present.
+        Assert.That(ids, Does.Contain(100L));
+        Assert.That(ids, Does.Contain(101L));
+    }
+}