Implement villager trade restock tweak

README.md

@@ -38,7 +38,7 @@ All changes are toggleable via config files.
 * **Entity Bounding Boxes:** Saves entity bounding boxes to tags to prevent breakouts and suffocation
 * **Entity Desync:** Fixes entity motion desyncs most notable with arrows and thrown items
 * **Entity ID:** Fixes non-functional elytra firework boosting and guardian targeting if the entity ID is 0
-* **Entity Lists:** Fixes entity lists often not getting updated correctly 
+* **Entity Lists:** Fixes entity lists often not getting updated correctly
 * **Entity NaN:** Prevents corruption of entities caused by invalid health or damage values
 * **Entity Suffocation:** Pushes entities out of blocks when growing up to prevent suffocation
 * **Entity Tracker:** Fixes entity tracker to prevent client-sided desyncs when teleporting or changing dimensions
@@ -117,6 +117,7 @@ All changes are toggleable via config files.
 * **Disable Narrator:** Disables the narrator functionality entirely
 * **Disable Sleeping:** Disables skipping night by using a bed while making it still able to set spawn
 * **Disable Villager Trade Leveling:** Disables leveling of villager careers, only allowing base level trades
+* **Disable Villager Trade Restock:** Disables restocking of villager trades, only allowing one trade per offer
 * **Disable Wither Targeting AI:** Disables withers targeting animals
 * **Easy Breeding:** Enables easy breeding of animals by tossing food on the ground
 * **End Portal Parallax:** Re-implements parallax rendering of the end portal from 1.11 and older

src/main/java/mod/acgaming/universaltweaks/config/UTConfigTweaks.java

@@ -436,6 +436,11 @@ public static class EntitiesCategory
         @Config.Comment("Disables leveling of villager careers, only allowing base level trades")
         public boolean utVillagerTradeLevelingToggle = false;
 
+        @Config.RequiresMcRestart
+        @Config.Name("Disable Villager Trade Restock")
+        @Config.Comment("Disables restocking of villager trades, only allowing one trade per offer")
+        public boolean utVillagerTradeRestockToggle = false;
+
         @Config.RequiresMcRestart
         @Config.Name("Disable Wither Targeting AI")
         @Config.Comment("Disables withers targeting animals")
@@ -1022,7 +1027,7 @@ public static class ItemEntitiesCategory
 
             @Config.Name("[17] Slowed Movement")
             @Config.Comment("Slows how often item entities update their position to improve performance")
-            public boolean utIEUpdateToggle  = true;
+            public boolean utIEUpdateToggle = true;
         }
 
         public static class MendingCategory

src/main/java/mod/acgaming/universaltweaks/core/UTLoadingPlugin.java

@@ -436,7 +436,7 @@ public boolean shouldMixinConfigQueue(String mixinConfig)
             case "mixins.tweaks.entities.taming.horse.json":
                 return UTConfigTweaks.ENTITIES.UNDEAD_HORSES.utTamingUndeadHorsesToggle;
             case "mixins.tweaks.entities.trading.json":
-                return UTConfigTweaks.ENTITIES.utVillagerTradeLevelingToggle;
+                return UTConfigTweaks.ENTITIES.utVillagerTradeLevelingToggle || UTConfigTweaks.ENTITIES.utVillagerTradeRestockToggle;
             case "mixins.tweaks.items.attackcooldown.server.json":
                 return UTConfigTweaks.ITEMS.ATTACK_COOLDOWN.utAttackCooldownToggle;
             case "mixins.tweaks.items.eating.json":

src/main/java/mod/acgaming/universaltweaks/tweaks/entities/trading/mixin/UTMerchantRecipeMixin.java

@@ -0,0 +1,19 @@
+package mod.acgaming.universaltweaks.tweaks.entities.trading.mixin;
+
+import net.minecraft.village.MerchantRecipe;
+
+import mod.acgaming.universaltweaks.config.UTConfigTweaks;
+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(MerchantRecipe.class)
+public class UTMerchantRecipeMixin
+{
+    @Inject(method = "getMaxTradeUses", at = @At("HEAD"), cancellable = true)
+    public void utGetMaxTradeUses(CallbackInfoReturnable<Integer> cir)
+    {
+        if (UTConfigTweaks.ENTITIES.utVillagerTradeRestockToggle) cir.setReturnValue(1);
+    }
+}

src/main/resources/mixins.tweaks.entities.trading.json

@@ -3,5 +3,5 @@
   "refmap": "universaltweaks.refmap.json",
   "minVersion": "0.8",
   "compatibilityLevel": "JAVA_8",
-  "mixins": ["UTVillagerRegistryMixin"]
+  "mixins": ["UTMerchantRecipeMixin", "UTVillagerRegistryMixin"]
 }