Fixed server crash. Fixes #61

src/main/java/com/minelittlepony/unicopia/network/MsgServerResources.java

@@ -5,12 +5,9 @@ import java.util.*;
 import com.minelittlepony.unicopia.InteractionManager;
 import com.minelittlepony.unicopia.ability.data.tree.TreeTypeLoader;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
-import com.minelittlepony.unicopia.client.gui.spellbook.ClientChapters;
 import com.minelittlepony.unicopia.container.SpellbookChapterLoader;
 import com.minelittlepony.unicopia.util.network.Packet;
 
-import net.fabricmc.api.EnvType;
-import net.fabricmc.api.Environment;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.network.PacketByteBuf;
 import net.minecraft.util.Identifier;
@@ -26,10 +23,9 @@ public class MsgServerResources implements Packet<PlayerEntity> {
         treeTypes = TreeTypeLoader.INSTANCE.getEntries();
     }
 
-    @Environment(EnvType.CLIENT)
     public MsgServerResources(PacketByteBuf buffer) {
         traits = buffer.readMap(PacketByteBuf::readIdentifier, SpellTraits::fromPacket);
-        chapters = buffer.readMap(PacketByteBuf::readIdentifier, ClientChapters::loadChapter);
+        chapters = InteractionManager.instance().getClientNetworkHandler().readChapters(buffer);
         treeTypes = buffer.readMap(PacketByteBuf::readIdentifier, TreeTypeLoader.TreeTypeDef::new);
     }
 

src/main/java/com/minelittlepony/unicopia/network/handler/ClientNetworkHandler.java

@@ -1,7 +1,12 @@
 package com.minelittlepony.unicopia.network.handler;
 
+import java.util.Map;
+
 import com.minelittlepony.unicopia.network.*;
 
+import net.minecraft.network.PacketByteBuf;
+import net.minecraft.util.Identifier;
+
 public interface ClientNetworkHandler {
 
     void handleTribeScreen(MsgTribeSelect packet);
@@ -15,4 +20,6 @@ public interface ClientNetworkHandler {
     void handleUnlockTraits(MsgUnlockTraits packet);
 
     void handleServerResources(MsgServerResources packet);
+
+    Map<Identifier, ?> readChapters(PacketByteBuf buf);
 }

src/main/java/com/minelittlepony/unicopia/network/handler/ClientNetworkHandlerImpl.java

@@ -20,6 +20,7 @@ import com.minelittlepony.unicopia.network.*;
 import net.minecraft.client.MinecraftClient;
 import net.minecraft.client.world.ClientWorld;
 import net.minecraft.entity.Entity;
+import net.minecraft.network.PacketByteBuf;
 import net.minecraft.util.Identifier;
 
 public class ClientNetworkHandlerImpl implements ClientNetworkHandler {
@@ -78,6 +79,11 @@ public class ClientNetworkHandlerImpl implements ClientNetworkHandler {
         }
     }
 
+    @Override
+    public Map<Identifier, ?> readChapters(PacketByteBuf buffer) {
+        return  buffer.readMap(PacketByteBuf::readIdentifier, ClientChapters::loadChapter);
+    }
+
     @SuppressWarnings("unchecked")
     @Override
     public void handleServerResources(MsgServerResources packet) {

src/main/resources/unicopia.mixin.json

@@ -35,7 +35,6 @@
     "MixinWorld",
     "MixinWorldChunk",
     "trinkets.MixinTrinketSurvivalSlot",
-    "trinkets.MixinTrinketCreativeSlot",
     "trinkets.MixinTrinketItem",
     "trinkets.MixinTrinketInventory",
     "trinkets.MixinScreenHandler"
@@ -57,7 +56,8 @@
     "client.MixinPlayerEntityRenderer",
     "client.MixinTooltipComponent",
     "client.MixinWorldRenderer",
-    "client.sodium.MixinSodiumWorldRenderer"
+    "client.sodium.MixinSodiumWorldRenderer",
+    "trinkets.MixinTrinketCreativeSlot"
   ],
   "injectors": {
     "defaultRequire": 1