1 files changed, 93 insertions, 0 deletions
diff --git a/featureClass/forgeEvents.js b/featureClass/forgeEvents.js
new file mode 100644
index 0000000..e852c49
--- /dev/null
+++ b/featureClass/forgeEvents.js
@@ -0,0 +1,93 @@
+importClass(net.minecraftforge.common.MinecraftForge) //i would have used the ct module but it is broken (line 78) (this is fixed verison)
+importPackage(net.minecraftforge.fml.common.eventhandler)
+importPackage(org.objectweb.asm)
+importClass(java.lang.ClassLoader)
+importClass(org.apache.commons.lang3.RandomStringUtils)
+importClass(java.util.function.Consumer)
+
+const L = s => `L${s};`
+
+const LoadedInsts = []
+
+function defineClassBytes(name, bytes) {
+  const classLoader = Packages.com.chattriggers.ctjs.CTJS.class.getClassLoader()
+
+  const defClass = ClassLoader.class.getDeclaredMethods()[23] // defineClass()
+
+  defClass.setAccessible(true)
+
+  const n = new java.lang.String(name)
+  const o = new java.lang.Integer(0)
+  const s = new java.lang.Integer(bytes.length)
+  return defClass.invoke(classLoader, n, bytes, o, s)
+}
+
+const registerForge = (e, cb) => {
+  const cw = new ClassWriter(0)
+
+  const event = Type.getType(e.class).internalName
+  const name = RandomStringUtils.randomAlphabetic(7)
+
+  const consumer = Type.getType(Consumer.class).internalName
+  const mcForge = Type.getType(MinecraftForge.class).internalName
+  const eventBus = Type.getType(EventBus.class).internalName
+  const subscribeEvent = Type.getType(SubscribeEvent.class).internalName
+  const obj = Type.getType(java.lang.Object.class).internalName
+
+  cw.visit(Opcodes.V1_8, Opcodes.ACC_PUBLIC, name, null, obj, null)
+  // cw.visitInnerClass("net/minecraftforge/event/entity/player/PlayerEvent$BreakSpeed", "net/minecraftforge/event/entity/player/PlayerEvent", "BreakSpeed", ACC_PUBLIC + ACC_STATIC);
+  {
+    cw.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_FINAL, "callback", L(consumer), L(consumer + "<" + L(event) + ">"), null).visitEnd()
+  }
+  {
+    const con = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "(" + L(consumer) + ")V", "(" + L(consumer + "<" + L(event) + ">") + ")V", null)
+    con.visitCode()
+    con.visitVarInsn(Opcodes.ALOAD, 0)
+    con.visitMethodInsn(Opcodes.INVOKESPECIAL, obj, "<init>", "()V", false)
+    
+    con.visitVarInsn(Opcodes.ALOAD, 0)
+    con.visitVarInsn(Opcodes.ALOAD, 1)
+    con.visitFieldInsn(Opcodes.PUTFIELD, name, "callback", L(consumer))
+    con.visitFieldInsn(Opcodes.GETSTATIC, mcForge, "EVENT_BUS", L(eventBus))
+    con.visitVarInsn(Opcodes.ALOAD, 0)
+    con.visitMethodInsn(Opcodes.INVOKEVIRTUAL, eventBus, "register", "(" + L(obj) + ")V", false)
+    con.visitInsn(Opcodes.RETURN)
+    con.visitMaxs(2, 2)
+    con.visitEnd()
+  }
+  {
+    const mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "on", "(" + L(event) + ")V", null, null)
+    {
+      const av = mv.visitAnnotation(L(subscribeEvent), true)
+      av.visitEnd()
+    }
+    mv.visitCode()
+    mv.visitVarInsn(Opcodes.ALOAD, 0)
+    mv.visitFieldInsn(Opcodes.GETFIELD, name, "callback", L(consumer))
+    mv.visitVarInsn(Opcodes.ALOAD, 1)
+    mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, consumer, "accept", "(" + L(obj) + ")V", true)
+    mv.visitInsn(Opcodes.RETURN)
+    mv.visitMaxs(2, 2)
+    mv.visitEnd()
+  }
+  cw.visitEnd()
+
+  const inst = defineClassBytes(name, cw.toByteArray())
+    .getDeclaredConstructor(Consumer.class)
+    .newInstance(new java.util.function.Consumer({
+      accept: function (t) { cb(t) } 
+    }))
+  LoadedInsts.push(inst)
+  return inst;
+}
+
+const unregisterForge = inst => {
+  MinecraftForge.EVENT_BUS.unregister(inst)
+}
+
+register("gameUnload", () => {
+  LoadedInsts.forEach(unregisterForge) 
+  LoadedInsts.length = 0
+})
+
+export { registerForge, unregisterForge }