crystall-punk-14/Content.Shared/_CP14/Currency/CP14SharedCurrencySystem.cs

using System.Text;
using Content.Shared.Stacks;
using Robust.Shared.Prototypes;
namespace Content.Shared._CP14.Currency;

public partial class CP14SharedCurrencySystem : EntitySystem
{
    public static readonly KeyValuePair<EntProtoId, int> CP = new("CP14CopperCoin1", 1);
    public static readonly KeyValuePair<EntProtoId, int> SP = new("CP14SilverCoin1", 10);
    public static readonly KeyValuePair<EntProtoId, int> GP = new("CP14GoldCoin1", 100);
    public static readonly KeyValuePair<EntProtoId, int> PP = new("CP14PlatinumCoin1", 1000);

    public string GetCurrencyPrettyString(int currency)
    {
        var total = currency;

        if (total <= 0)
            return string.Empty;

        var gp = total / 100;
        total %= 100;

        var sp = total / 10;
        total %= 10;

        var cp = total;

        var sb = new StringBuilder();

        if (gp > 0)
            sb.Append( " " + Loc.GetString("cp14-currency-examine-gp", ("coin", gp)));
        if (sp > 0)
            sb.Append( " " + Loc.GetString("cp14-currency-examine-sp", ("coin", sp)));
        if (cp > 0)
            sb.Append( " " + Loc.GetString("cp14-currency-examine-cp", ("coin", cp)));

        return sb.ToString();
    }

    public int GetTotalCurrency(EntityUid uid)
    {
        var ev = new CP14GetCurrencyEvent();
        RaiseLocalEvent(uid, ev);

        return (int)(ev.Currency * ev.Multiplier);
    }
}

public sealed class CP14GetCurrencyEvent(int currency = 0, int multiplier = 1) : EntityEventArgs
{
    public HashSet<EntityUid> CheckedEntities = new();
    public int Currency = currency;
    public float Multiplier = multiplier;
}