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Add world delta streaming and viewer smoothing

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This commit is contained in:
Jonathan Bourdon
2026-03-12 19:03:13 -04:00
parent 2fb90162ef
commit 9849dbae61
10 changed files with 966 additions and 177 deletions
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24
apps/backend/Program.cs
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@@ -1,6 +1,8 @@
using SpaceGame.Simulation.Api.Simulation;
using System.Text.Json;
var builder = WebApplication.CreateBuilder(args);
var sseJsonOptions = new JsonSerializerOptions(JsonSerializerDefaults.Web);
builder.WebHost.UseUrls("http://127.0.0.1:5079");
builder.Services.AddCors((options) =>
@@ -22,10 +24,30 @@ app.UseCors();
app.MapGet("/", () => Results.Redirect("/api/world"));
app.MapGet("/api/world", (WorldService worldService) => Results.Ok(worldService.GetSnapshot()));
app.MapGet("/api/world/stream", async (HttpContext httpContext, WorldService worldService, CancellationToken cancellationToken) =>
{
httpContext.Response.Headers.Append("Cache-Control", "no-cache");
httpContext.Response.Headers.Append("Content-Type", "text/event-stream");
var afterSequenceRaw = httpContext.Request.Query["afterSequence"].ToString();
_ = long.TryParse(afterSequenceRaw, out var afterSequence);
var stream = worldService.Subscribe(afterSequence, cancellationToken);
await httpContext.Response.WriteAsync(": connected\n\n", cancellationToken);
await httpContext.Response.Body.FlushAsync(cancellationToken);
await foreach (var delta in stream.ReadAllAsync(cancellationToken))
{
var payload = JsonSerializer.Serialize(delta, sseJsonOptions);
await httpContext.Response.WriteAsync($"event: world-delta\ndata: {payload}\n\n", cancellationToken);
await httpContext.Response.Body.FlushAsync(cancellationToken);
}
});
app.MapGet("/api/world/health", (WorldService worldService) => Results.Ok(new
{
ok = true,
generatedAtUtc = worldService.GetSnapshot().GeneratedAtUtc,
sequence = worldService.GetStatus().Sequence,
generatedAtUtc = worldService.GetStatus().GeneratedAtUtc,
}));
app.MapPost("/api/world/reset", (WorldService worldService) =>
{