ItemChecklist/ItemChecklistGlobalItem.cs

using Terraria;
using Terraria.DataStructures;
using Terraria.Localization;
using Terraria.ModLoader;

namespace ItemChecklist
{
	class ItemChecklistGlobalItem : GlobalItem
	{
		const string LOCALIZATION_KEY = "Mods.ItemChecklist.GlobalItem.";
		private static LocalizedText ItemChecklistAnnounceText;

		public override void SetStaticDefaults()
		{
			ItemChecklistAnnounceText = Language.GetOrRegister( LOCALIZATION_KEY + nameof(ItemChecklistAnnounceText) ); 
		}

		// OnPIckup only called on LocalPlayer: I think
		public override void OnCreated(Item item, ItemCreationContext context)
		{
			if (context is RecipeItemCreationContext rContext) {
				ItemReceived(item);
			}
		}

		// OnPIckup only called on LocalPlayer: i == Main.myPlayer
		public override bool OnPickup(Item item, Player player)
		{
			ItemReceived(item);
			return true;
		}

		// TODO, unloaded items, check against??
		internal void ItemReceived(Item item)
		{
			var itemChecklistPlayer = Main.LocalPlayer.GetModPlayer<ItemChecklistPlayer>();
			if (!itemChecklistPlayer.foundItem[item.type] && itemChecklistPlayer.findableItems[item.type])
			{
				Item newItem = new Item();
				newItem.SetDefaults(item.type);
				itemChecklistPlayer.foundItems.Add(newItem);
				itemChecklistPlayer.totalItemsFound++;
				itemChecklistPlayer.foundItem[item.type] = true;
				ItemChecklist.instance.ItemChecklistUI.UpdateNeeded(item.type);
				if (ItemChecklistUI.announce)
				{
					Main.NewText(ItemChecklistAnnounceText.Format(item.Name, 
					                                              itemChecklistPlayer.totalItemsFound, 
					                                              itemChecklistPlayer.totalItemsToFind, 
					                                              (100f*itemChecklistPlayer.totalItemsFound/itemChecklistPlayer.totalItemsToFind).ToString("0.00")));
				}
				ItemChecklist.instance.NewItem(item.type);
			}
		}
	}
}