portal caching, ignored item not creating portals issue on purpose

src/main/java/carpet/mixins/PortalBlock_portalCachingMixin.java

@@ -0,0 +1,43 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import carpet.fakes.PortalForcerInterface;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.PortalBlock;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.world.IWorld;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(PortalBlock.class)
+public class PortalBlock_portalCachingMixin
+{
+    @Inject(method = "createPortalAt", at = @At(
+            value =  "INVOKE",
+            target = "Lnet/minecraft/block/PortalBlock$AreaHelper;createPortal()V"
+    ))
+    private void onCreatePortal(IWorld iWorld_1, BlockPos blockPos_1, CallbackInfoReturnable<Boolean> cir)
+    {
+        if (!iWorld_1.isClient() && CarpetSettings.getBool("portalCaching"))
+        {
+            ((PortalForcerInterface)((ServerWorld)iWorld_1).getPortalForcer()).invalidateCache();
+        }
+    }
+
+    @Inject(method = "getStateForNeighborUpdate", at = @At(
+            value = "INVOKE",
+            target = "Lnet/minecraft/block/Block;getDefaultState()Lnet/minecraft/block/BlockState;"
+    ))
+    private void getAirBlockState(BlockState blockState_1, Direction direction_1, BlockState blockState_2, IWorld iWorld_1, BlockPos blockPos_1, BlockPos blockPos_2, CallbackInfoReturnable<BlockState> cir)
+    {
+        if (!iWorld_1.isClient() && CarpetSettings.getBool("portalCaching"))
+        {
+            ((PortalForcerInterface)((ServerWorld)iWorld_1).getPortalForcer()).invalidateCache();
+        }
+    }
+
+}