Went down huge rabbit hole to attempt adding scripted events for players. Chock full of errors, trying to backport classes from the 1.12 version.

src/main/java/noppes/npcs/scripted/NpcAPI.java

@@ -0,0 +1,119 @@
+//
+// Source code recreated from a .class file by IntelliJ IDEA
+// (powered by Fernflower decompiler)
+//
+
+package noppes.npcs.scripted;
+
+import java.io.File;
+
+import net.minecraft.entity.Entity;
+import net.minecraft.inventory.Container;
+import net.minecraft.inventory.IInventory;
+import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.NBTTagCompound;
+import net.minecraft.util.DamageSource;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import net.minecraft.world.WorldServer;
+import cpw.mods.fml.common.Loader;
+import cpw.mods.fml.common.eventhandler.EventBus;
+import noppes.npcs.scripted.CommandNoppesBase;
+import noppes.npcs.scripted.IContainer;
+import noppes.npcs.scripted.IDamageSource;
+import noppes.npcs.scripted.INbt;
+import noppes.npcs.scripted.IWorld;
+import noppes.npcs.scripted.entity.ICustomNpc;
+import noppes.npcs.scripted.entity.IEntity;
+import noppes.npcs.scripted.entity.data.IPlayerMail;
+import noppes.npcs.scripted.gui.ICustomGui;
+import noppes.npcs.scripted.handler.ICloneHandler;
+import noppes.npcs.scripted.handler.IDialogHandler;
+import noppes.npcs.scripted.handler.IFactionHandler;
+import noppes.npcs.scripted.handler.IQuestHandler;
+import noppes.npcs.scripted.handler.IRecipeHandler;
+import noppes.npcs.scripted.item.IItemStack;
+
+public abstract class NpcAPI {
+    private static NpcAPI instance = null;
+
+    public NpcAPI() {
+    }
+
+    public abstract ICustomNpc createNPC(World var1);
+
+    public abstract ICustomNpc spawnNPC(World var1, int var2, int var3, int var4);
+
+    public abstract IEntity getIEntity(Entity var1);
+
+    public abstract IContainer getIContainer(IInventory var1);
+
+    public abstract IContainer getIContainer(Container var1);
+
+    public abstract IItemStack getIItemStack(ItemStack var1);
+
+    public abstract IWorld getIWorld(WorldServer var1);
+
+    public abstract IWorld getIWorld(int var1);
+
+    public abstract IWorld[] getIWorlds();
+
+    public abstract INbt getINbt(NBTTagCompound var1);
+
+    public abstract IFactionHandler getFactions();
+
+    public abstract IRecipeHandler getRecipes();
+
+    public abstract IQuestHandler getQuests();
+
+    public abstract IDialogHandler getDialogs();
+
+    public abstract ICloneHandler getClones();
+
+    public abstract IDamageSource getIDamageSource(DamageSource var1);
+
+    public abstract INbt stringToNbt(String var1);
+
+    public abstract IPlayerMail createMail(String var1, String var2);
+
+    public abstract ICustomGui createCustomGui(int var1, int var2, int var3, boolean var4);
+
+    public abstract INbt getRawPlayerData(String var1);
+
+    public abstract EventBus events();
+
+    public abstract void registerCommand(CommandNoppesBase var1);
+
+    public abstract File getGlobalDir();
+
+    public abstract File getWorldDir();
+
+    public static boolean IsAvailable() {
+        return Loader.isModLoaded("customnpcs");
+    }
+
+    public static NpcAPI Instance() {
+        if(instance != null) {
+            return instance;
+        } else if(!IsAvailable()) {
+            return null;
+        } else {
+            try {
+                Class e = Class.forName("noppes.npcs.api.wrapper.WrapperNpcAPI");
+                instance = (NpcAPI)e.getMethod("Instance", new Class[0]).invoke((Object)null, new Object[0]);
+            } catch (Exception var1) {
+                var1.printStackTrace();
+            }
+
+            return instance;
+        }
+    }
+
+    public abstract void registerPermissionNode(String var1, int var2);
+
+    public abstract boolean hasPermissionNode(String var1);
+
+    public abstract String executeCommand(IWorld var1, String var2);
+
+    public abstract String getRandomName(int var1, int var2);
+}