TerrariaHealingPlugin/HealingPlugin.cs

using Terraria;
using TShockAPI;
using TerrariaApi.Server;

namespace TerrariaHealingPlugin;

[ApiVersion(2, 1)]
public class HealingPlugin : TerrariaPlugin
{
    public override string Author => "Sneefaria Maintainers";
    public override string Name => "HealingPlugin";
    public override string Description => "A healing plugin, duh";
    public override Version Version => new Version(1, 0, 0);
    private DateTime _lastCheck = DateTime.UtcNow;

    public HealingPlugin(Main game) : base(game) { }

    public override void Initialize()
    {
        ServerApi.Hooks.GamePostInitialize.Register(this, OnGamePostInitialize);
        ServerApi.Hooks.ServerJoin.Register(this, OnServerJoin);
        ServerApi.Hooks.GameUpdate.Register(this, OnUpdate);
    }

    protected override void Dispose(bool disposing)
    {
        if (disposing)
        {
            ServerApi.Hooks.GamePostInitialize.Deregister(this, OnGamePostInitialize);
            ServerApi.Hooks.ServerJoin.Deregister(this, OnServerJoin);
            ServerApi.Hooks.GameUpdate.Deregister(this, OnUpdate);
        }
        base.Dispose(disposing);
    }

    private void OnUpdate(EventArgs args)
    {
        if ((DateTime.UtcNow - _lastCheck).TotalSeconds >= 1)
        {
            _lastCheck = DateTime.UtcNow;

            foreach (var player in TShock.Players)
            {
                if (player != null && player.Active)
                {
                    player.Heal(25); // heal all players 25 HP/second
                }
            }
        }
    }

    private void OnGamePostInitialize(EventArgs args)
    {
        TShock.Log.Info($"{Name} v{Version} has been initialized.");
    }

    private void OnServerJoin(JoinEventArgs args)
    {
        TShock.Log.Info($"{args.Who} has joined the server.");
    }
}