SVSimServer/SVSim.EmulatedEntrypoint/Controllers/AccountController.cs

using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using SVSim.Database;
using SVSim.EmulatedEntrypoint.Models.Dtos.Requests.Account;

namespace SVSim.EmulatedEntrypoint.Controllers;

/// <summary>
/// /account/* — viewer profile mutations that aren't tied to a specific subsystem.
/// </summary>
public class AccountController : SVSimController
{
    private readonly SVSimDbContext _db;

    public AccountController(SVSimDbContext db)
    {
        _db = db;
    }

    [HttpPost("update_name")]
    public async Task<IActionResult> UpdateName([FromBody] AccountUpdateNameRequest request)
    {
        if (!TryGetViewerId(out long viewerId)) return Unauthorized();

        var viewer = await _db.Viewers.FirstAsync(v => v.Id == viewerId);
        viewer.DisplayName = request.Name;
        await _db.SaveChangesAsync();

        // Prod returns `data: []` — empty array, not empty object. Use an empty array literal
        // so the translation middleware emits the right msgpack shape.
        return Ok(Array.Empty<object>());
    }
}