Fix Network error caused by primitivemobs

build.gradle

@@ -106,6 +106,7 @@ dependencies {
     }
     provided("p455w0rds-library:p455w0rdslib:1.12.2:2.2.151")
     provided("primalcore:PrimalCore:1.12.2:0.6.51")
+    provided("primitive-mobs:primitivemobs:1.2.3a")
     provided("quark:Quark:r1.5:145")
     provided("reliquary-v1-3:Reliquary:1.12.2:1.3.4.786")
     provided("ruins-structure-spawning-system:Ruins:1.12.2")
@@ -157,6 +158,7 @@ jar {
                         + "mixins.sledgehammer.morph.json,"
                         + "mixins.sledgehammer.p455w0rdslib.json,"
                         + "mixins.sledgehammer.platform.json,"
+                        + "mixins.sledgehammer.primitivemobs.json,"
                         + "mixins.sledgehammer.projectred.json,"
                         + "mixins.sledgehammer.quark.json,"
                         + "mixins.sledgehammer.ruins.json,"

src/main/java/io/github/lxgaming/sledgehammer/configuration/category/mixin/PrimitiveMobsMixinCategory.java

@@ -23,10 +23,18 @@
 @ConfigSerializable
 public class PrimitiveMobsMixinCategory {
 
+    @Mapping(value = "primitivemobs.message.MessagePrimitiveJumpingMixin", dependencies = {"primitivemobs"})
+    @Setting(value = "networking", comment = "If 'true', fixes NullPointerException caused by MessagePrimitiveJumping")
+    private boolean network = false;
+
     @Mapping(value = "forge.entity.passive.EntityVillagerMixin")
     @Setting(value = "traveling-merchant", comment = "If 'true', fixes https://github.com/Daveyx0/PrimitiveMobs/issues/59 (Sponge only).")
     private boolean travelingMerchant = false;
 
+    public boolean isNetwork() {
+        return network;
+    }
+
     public boolean isTravelingMerchant() {
         return travelingMerchant;
     }

src/main/java/io/github/lxgaming/sledgehammer/mixin/primitivemobs/message/MessagePrimitiveJumpingMixin.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2019 Alex Thomson
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.github.lxgaming.sledgehammer.mixin.primitivemobs.message;
+
+import net.daveyx0.primitivemobs.message.MessagePrimitiveJumping;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraftforge.fml.common.network.simpleimpl.IMessage;
+import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;
+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;
+import org.spongepowered.asm.mixin.injection.callback.LocalCapture;
+
+import java.util.UUID;
+
+@Mixin(value = MessagePrimitiveJumping.Handler.class, priority = 1337, remap = false)
+public abstract class MessagePrimitiveJumpingMixin {
+
+    @Inject(method = "onMessage",
+            at = @At(value = "INVOKE_ASSIGN",
+                    target = "Lnet/minecraft/world/World;getPlayerEntityByUUID(Ljava/util/UUID;)Lnet/minecraft/entity/player/EntityPlayer;"
+            ),
+            remap = true,
+            locals = LocalCapture.CAPTURE_FAILHARD,
+            cancellable = true
+    )
+    private void onMessage(MessagePrimitiveJumping message, MessageContext ctx, CallbackInfoReturnable<IMessage> callbackInfoReturnable,
+                           UUID id, EntityPlayer truePlayer) {
+        if (truePlayer == null) {
+            callbackInfoReturnable.setReturnValue(null);
+        }
+    }
+}

src/main/resources/mixins.sledgehammer.primitivemobs.json

@@ -0,0 +1,15 @@
+{
+  "required": false,
+  "minVersion": "0.7.10",
+  "package": "io.github.lxgaming.sledgehammer.mixin.primitivemobs",
+  "refmap": "mixins.sledgehammer.refmap.json",
+  "plugin": "io.github.lxgaming.sledgehammer.mixin.plugin.CorePlugin",
+  "target": "@env(DEFAULT)",
+  "compatibilityLevel": "JAVA_8",
+  "mixins": [
+    "message.MessagePrimitiveJumpingMixin"
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  }
+}