damaged-thunder/server/Controllers/TickController.cs

using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using gameapi.Library;
using Microsoft.Extensions.Hosting;

public class TickController : IHostedService
{
	private Timer timer;
	private GameState game;
	private DateTime lastTime;

	public TickController()
	{
		this.game = GameState.GetInstance();
		lastTime = DateTime.UtcNow;
	}
	public Task StartAsync(CancellationToken cancellationToken)
	{
		this.timer = new Timer(o => TickUpdate(), null, TimeSpan.Zero, TimeSpan.FromMilliseconds(100));
		return Task.CompletedTask;
	}

	public async void TickUpdate()
	{
		List<Task> tasksToComplete = new List<Task>();
        var population = this.game.GetAllPlayers();

		var currentTime = DateTime.UtcNow;
		var delta = 1 + currentTime.Subtract(lastTime).TotalMilliseconds / 1000;

		foreach (var player in population)
		{
			player.Update(delta);
			tasksToComplete.Add(this.game.MessageAllOtherPlayersInSector(player, "move " + player.GetShipData()));
		}

		await Task.WhenAll(tasksToComplete);
		lastTime = currentTime;
	}

	public Task StopAsync(CancellationToken cancellationToken)
	{
		timer.Change(Timeout.Infinite, 0);
		return Task.CompletedTask;
	}
}