Port fluid ingredient and tag key serializers from tinkers

src/main/java/slimeknights/mantle/data/TagKeySerializer.java

@@ -0,0 +1,34 @@
+package slimeknights.mantle.data;
+
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonPrimitive;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+import lombok.RequiredArgsConstructor;
+import net.minecraft.core.Registry;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.tags.TagKey;
+import slimeknights.mantle.util.JsonHelper;
+
+import java.lang.reflect.Type;
+
+/**
+ * Serializer for a generic tag key type
+ */
+@RequiredArgsConstructor
+public class TagKeySerializer<T> implements JsonSerializer<TagKey<T>>, JsonDeserializer<TagKey<T>> {
+  private final ResourceKey<Registry<T>> registry;
+
+  @Override
+  public TagKey<T> deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+    return TagKey.create(registry, JsonHelper.convertToResourceLocation(json, "tag"));
+  }
+
+  @Override
+  public JsonElement serialize(TagKey<T> src, Type typeOfSrc, JsonSerializationContext context) {
+    return new JsonPrimitive(src.location().toString());
+  }
+}

src/main/java/slimeknights/mantle/recipe/ingredient/FluidIngredient.java

@@ -1,8 +1,13 @@
 package slimeknights.mantle.recipe.ingredient;
 
 import com.google.gson.JsonArray;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
 import com.google.gson.JsonSyntaxException;
 import lombok.AccessLevel;
 import lombok.AllArgsConstructor;
@@ -19,6 +24,7 @@
 import net.minecraftforge.registries.ForgeRegistries;
 import slimeknights.mantle.util.JsonHelper;
 
+import java.lang.reflect.Type;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
@@ -31,6 +37,8 @@
 public abstract class FluidIngredient {
   /** Empty fluid ingredient, matches nothing */
   public static final FluidIngredient EMPTY = new Empty();
+  /** Fluid json serializer instance */
+  public static Serializer SERIALIZER = new Serializer();
 
   /** Cached list of display fluids */
   private List<FluidStack> displayFluids;
@@ -433,4 +441,19 @@ private static Compound deserialize(JsonArray array, String name) {
       return new Compound(ingredients);
     }
   }
+
+  /** Json serializer for fluids */
+  public static class Serializer implements JsonDeserializer<FluidIngredient>, JsonSerializer<FluidIngredient> {
+    private Serializer() {}
+
+    @Override
+    public FluidIngredient deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+      return FluidIngredient.deserialize(json, "ingredient");
+    }
+
+    @Override
+    public JsonElement serialize(FluidIngredient src, Type typeOfSrc, JsonSerializationContext context) {
+      return src.serialize();
+    }
+  }
 }