Made ExampleExplosive count for Demolitionist Spawn

Added Hook so ExampleExplosive counts for demolitionist spawn

ExampleMod/ExamplePlayer.cs

@@ -47,6 +47,7 @@ public class ExamplePlayer : ModPlayer
 		public bool exampleLightPet;
 		public bool exampleShield;
 		public bool infinity;
+		public bool exampleExplosive;
 		public bool strongBeesUpgrade;
 		public bool manaHeart;
 		public int manaHeartCounter;
@@ -78,7 +79,8 @@ public override void ResetEffects() {
 			exampleLightPet = false;
 			exampleShield = false;
 			infinity = false;
-			strongBeesUpgrade = false;
+		    strongBeesUpgrade = false;
+			exampleExplosive = false;
 			if (!manaHeart) {
 				manaHeartCounter = 0;
 			}

ExampleMod/Items/Weapons/ExampleExplosive.cs

@@ -1,13 +1,45 @@
 using Terraria;
 using Terraria.ID;
 using Terraria.ModLoader;
+using MonoMod.Cil;
+using static Mono.Cecil.Cil.OpCodes;
 using static Terraria.ModLoader.ModContent;
 
 namespace ExampleMod.Items.Weapons
 {
 	internal class ExampleExplosive : ModItem
 	{
-		// TODO, count as explosive for demolitionist spawn
+		public override bool Autoload(ref string name)
+		{
+			IL.Terraria.Main.UpdateTime_SpawnTownNPCs += HookUpdateTime_SpawnTownNPCs;
+			return base.Autoload(ref name);
+		}
+
+		private void HookUpdateTime_SpawnTownNPCs(ILContext il)
+		{
+			ILCursor cursor = new ILCursor(il);
+			//try to find where the item id for the Bomb is pushed onto stack
+			if (!cursor.TryGotoNext(MoveType.Before,
+				i => i.MatchLdcI4(166)))
+				return;
+			//move to the start of if statement
+			cursor.Index -= 7;
+			//We need to create another cursor to jump to when our check is true
+			ILCursor retCursor = cursor.Clone();
+
+			//Here we have to push the player field onto the eval stack
+			cursor.Emit(Ldsfld, typeof(Main).GetField(nameof(Main.player)));
+			cursor.Emit(Ldloc, 37);
+			cursor.Emit(Ldelem_Ref);
+			//Here we check if the player at the current index has ExampleExplosive
+			cursor.EmitDelegate<Func<Player, bool>>(player => 
+			{
+				return player.GetModPlayer<ExamplePlayer>().exampleExplosive;
+			});
+			//We have to find where the flag is set to true so we can jump to it
+			retCursor.TryGotoNext(i => i.Match(Ldc_I4_1));
+			cursor.Emit(Brtrue, retCursor.MarkLabel());
+		}
 
 		public override void SetStaticDefaults() {
 			base.SetStaticDefaults();
@@ -39,5 +71,14 @@ public override void AddRecipes() {
 			recipe.SetResult(this);
 			recipe.AddRecipe();
 		}
+
+		public override void UpdateInventory(Player player)
+		{
+			if (player.HasItem(ModContent.ItemType<ExampleExplosive>()))
+			{
+				player.GetModPlayer<ExamplePlayer>().exampleExplosive = true;
+			}
+			base.UpdateInventory(player);
+		}
 	}
 }