Radicade/Server/Gift/FriendotronService.cs

using RadicadeServer.RecNet.Avatar;
using RadicadeServer.RecNet.Enums.Store;

namespace RadicadeServer.Utils;

public static class FriendotronService
{
        public const string DefaultMessage = "A gift for you <3";

        public static readonly TimeSpan Cooldown = TimeSpan.FromHours(24);

        public static readonly Rarity[] StarTiers = { Rarity.Common, Rarity.Uncommon, Rarity.Rare };

        public const int MaxRecipients = 50;

        public static string CooldownKey(long accountId) => $"Friendotron.LastSent.{accountId}";

        public static string MessageOr(string? message) =>
        string.IsNullOrWhiteSpace(message) ? DefaultMessage : message.Trim();

        public static Rarity RollStarTier(Random random) => StarTiers[random.Next(StarTiers.Length)];

        public static ConsumableItem? RollConsumable(string? catalogJson, out Rarity starTier, Random? random = null)
    {
        var rng = random ?? Random.Shared;
        var tier = RollStarTier(rng);
        starTier = tier;

        var catalogue = ConsumableCatalog.ParseItems(catalogJson)
            .Where(item => !string.IsNullOrWhiteSpace(item.ConsumableItemDesc))
            .ToList();
        if (catalogue.Count == 0) return null;

        var ofTier = catalogue.Where(item => item.Rarity == tier).ToList();
        var pool = ofTier.Count > 0 ? ofTier : catalogue;
        return pool[rng.Next(pool.Count)];
    }

        public static Gift BuildBox(long senderId, string? message, ConsumableItem item, Rarity starTier) => new()
    {
        Context = GiftContext.Friendotron_Gift,
        FromPlayerId = senderId,
        Rarity = starTier,
        FriendlyName = item.FriendlyName,
        Tooltip = MessageOr(message),
        ConsumableItemDesc = ConsumableCatalog.ToClientDesc(item.ConsumableItemDesc)
    };

        public static string FormatRemaining(DateTime nowUtc, DateTime lastSentUtc)
    {
        var remaining = Cooldown - (nowUtc - lastSentUtc);
        if (remaining <= TimeSpan.Zero) return "0 minutes";

        var hours = (int)remaining.TotalHours;
        var minutes = remaining.Minutes;
        if (hours <= 0) return minutes <= 1 ? "1 minute" : $"{minutes} minutes";

        var hourText = hours == 1 ? "1 hour" : $"{hours} hours";
        if (minutes == 0) return hourText;
        return $"{hourText} {minutes} minutes";
    }
}