Match empty tags with null tags (#1159)

arclight-common/src/main/java/io/izzel/arclight/common/mixin/core/world/item/ItemStackMixin.java

@@ -2,6 +2,7 @@ package io.izzel.arclight.common.mixin.core.world.item;
 
 import io.izzel.arclight.common.bridge.core.entity.player.ServerPlayerEntityBridge;
 import io.izzel.arclight.common.bridge.core.item.ItemStackBridge;
+import io.izzel.arclight.i18n.ArclightConfig;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.util.RandomSource;
@@ -25,8 +26,10 @@ import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.ModifyVariable;
+import org.spongepowered.asm.mixin.injection.Redirect;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
+import java.util.Objects;
 import java.util.function.Consumer;
 
 @Mixin(ItemStack.class)
@@ -98,4 +101,20 @@ public abstract class ItemStackMixin extends CapabilityProvider<ItemStack> imple
         this.item = item;
         this.delegate = ForgeRegistries.ITEMS.getDelegateOrThrow(item);
     }
+
+    @Redirect(method = "isSameItemSameTags", at = @At(value = "INVOKE", remap = false, target = "Ljava/util/Objects;equals(Ljava/lang/Object;Ljava/lang/Object;)Z"))
+    private static boolean arclight$lenientItemMatch(Object a, Object b) {
+        if (ArclightConfig.spec().getCompat().isLenientItemTagMatch()) {
+            var tagA = (CompoundTag) a;
+            var tagB = (CompoundTag) b;
+            if (tagB != null) {
+                var tmp = tagA;
+                tagA = tagB;
+                tagB = tmp;
+            }
+            return tagA == null || (tagA.isEmpty() ? (tagB == null || tagB.isEmpty()) : tagA.equals(tagB));
+        } else {
+            return Objects.equals(a, b);
+        }
+    }
 }

i18n-config/src/main/java/io/izzel/arclight/i18n/conf/CompatSpec.java

@@ -29,6 +29,9 @@ public class CompatSpec {
     @Setting("valid-username-regex")
     private String validUsernameRegex;
 
+    @Setting("lenient-item-tag-match")
+    private boolean lenientItemTagMatch;
+
     public Map<String, MaterialPropertySpec> getMaterials() {
         return materials;
     }
@@ -64,4 +67,8 @@ public class CompatSpec {
     public String getValidUsernameRegex() {
         return validUsernameRegex;
     }
+
+    public boolean isLenientItemTagMatch() {
+        return lenientItemTagMatch;
+    }
 }

i18n-config/src/main/resources/META-INF/arclight.conf

@@ -19,6 +19,7 @@ compatibility {
   ]
   forward-permission = true
   valid-username-regex = ""
+  lenient-item-tag-match = true
 }
 async-catcher {
   dump = true

i18n-config/src/main/resources/META-INF/i18n/en_us.conf

@@ -129,5 +129,8 @@ comments {
       "Following allows any username to login:"
       "valid-username-regex = \".+\""
     ]
+    lenient-item-tag-match.comment = [
+      "Allows items with an empty nbt tag stack on no tag items"
+    ]
   }
 }

i18n-config/src/main/resources/META-INF/i18n/zh_cn.conf

@@ -133,5 +133,8 @@ comments {
       "如果允许任何用户名可以使用"
       "valid-username-regex = \".+\""
     ]
+    lenient-item-tag-match.comment = [
+      "允许空 NBT 标签的物品和没有 NBT 标签的物品堆叠"
+    ]
   }
 }