ModifierRarityIO.cs

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using System;
using System.IO;
using Loot.Api.Core;
using Loot.Api.Loaders;
using Terraria;
using Terraria.ModLoader.IO;

namespace Loot.IO
{
    internal static class ModifierRarityIO
    {
        public const int SAVE_VERSION = 14;

        public static ModifierRarity NetReceive(Item item, BinaryReader reader)
        {
            string type = reader.ReadString();
            string modName = reader.ReadString();

            ModifierRarity rarity = ContentLoader.ModifierRarity.GetContent(modName, type);
            if (rarity == null)
            {
                throw new Exception($"ModifierRarity _NetReceive error for {modName}");
            }

            rarity.NetReceive(item, reader);
            return rarity;
        }

        public static void NetSend(ModifierRarity rarity, Item item, BinaryWriter writer)
        {
            writer.Write(rarity.Name);
            writer.Write(rarity.Mod.Name);
            rarity.NetSend(item, writer);
        }

        public static ModifierRarity Load(Item item, TagCompound tag)
        {
            if (tag == null || tag.ContainsKey("EMMErr:RarityNullErr"))
            {
                return NullModifierRarity.INSTANCE;
            }

            string modName = tag.GetString("ModName");

            if (RegistryLoader.Mods.TryGetValue(modName, out var assembly))
            {
                var saveVersion = tag.ContainsKey("SaveVersion") ? tag.GetInt("SaveVersion") : 1;

                if (saveVersion < 14)
                {
                    return NullModifierRarity.INSTANCE;
                }

                string rarityTypeName = tag.GetString("Type");
                var rarity = ContentLoader.ModifierRarity.GetContent(modName, rarityTypeName);
                if (rarity == null)
                {
                    return NullModifierRarity.INSTANCE;
                }

                rarity.Load(item, tag);
                return rarity;
            }

            Loot.Logger.ErrorFormat("There was a load error for modifierrarity, TC: {0}", tag);
            return NullModifierRarity.INSTANCE;
        }

        public static TagCompound Save(Item item, ModifierRarity rarity)
        {
            if (rarity == null)
            {
                // Should NEVER be null, instead be NullModifierRarity
                return new TagCompound { { "EMMErr:RarityNullErr", "ModifierRarity was null err" } };
            }

            var tag = new TagCompound
            {
                {"Type", rarity.GetType().Name},
                {"ModName", rarity.Mod.Name},
                {"SaveVersion", SAVE_VERSION}
            };
            rarity.Save(item, tag);
            return tag;
        }
    }
}