Added a recipe for removing items from jars

src/main/java/com/minelittlepony/unicopia/item/JarExtractRecipe.java

@@ -0,0 +1,60 @@
+package com.minelittlepony.unicopia.item;
+
+import org.jetbrains.annotations.Nullable;
+
+import net.minecraft.inventory.RecipeInputInventory;
+import net.minecraft.item.ItemStack;
+import net.minecraft.recipe.RecipeSerializer;
+import net.minecraft.recipe.SpecialCraftingRecipe;
+import net.minecraft.recipe.book.CraftingRecipeCategory;
+import net.minecraft.registry.DynamicRegistryManager;
+import net.minecraft.util.Identifier;
+import net.minecraft.world.World;
+
+public class JarExtractRecipe extends SpecialCraftingRecipe {
+    public JarExtractRecipe(Identifier id, CraftingRecipeCategory category) {
+        super(id, category);
+    }
+
+    @Override
+    public final boolean fits(int i, int j) {
+        return i * j >= 1;
+    }
+
+    @Override
+    public final boolean matches(RecipeInputInventory inventory, World world) {
+        return !craft(inventory, null).isEmpty();
+    }
+
+    @Override
+    public ItemStack craft(RecipeInputInventory inventory, @Nullable DynamicRegistryManager manager) {
+        ItemStack jar = ItemStack.EMPTY;
+        for (int i = 0; i < inventory.size(); i++) {
+            ItemStack stack = inventory.getStack(i);
+            if (stack.isEmpty()) {
+                continue;
+            }
+
+            if (!stack.isOf(UItems.FILLED_JAR)) {
+                return ItemStack.EMPTY;
+            }
+
+            if (!jar.isEmpty()) {
+                return ItemStack.EMPTY;
+            }
+
+            if (!UItems.FILLED_JAR.hasAppearance(stack)) {
+                return ItemStack.EMPTY;
+            }
+
+            jar = stack;
+        }
+
+        return UItems.FILLED_JAR.getAppearanceStack(jar);
+    }
+
+    @Override
+    public RecipeSerializer<?> getSerializer() {
+        return URecipes.JAR_INSERT_SERIALIZER;
+    }
+}

src/main/java/com/minelittlepony/unicopia/item/URecipes.java

@@ -23,6 +23,7 @@ public interface URecipes {
     RecipeSerializer<ShapelessRecipe> ZAP_APPLE_SERIALIZER = RecipeSerializer.register("unicopia:crafting_zap_apple", new ZapAppleRecipe.Serializer());
     RecipeSerializer<GlowingRecipe> GLOWING_SERIALIZER = RecipeSerializer.register("unicopia:crafting_glowing", new SpecialRecipeSerializer<>(GlowingRecipe::new));
     RecipeSerializer<JarInsertRecipe> JAR_INSERT_SERIALIZER = RecipeSerializer.register("unicopia:jar_insert", new SpecialRecipeSerializer<>(JarInsertRecipe::new));
+    RecipeSerializer<JarExtractRecipe> JAR_EXTRACT_SERIALIZER = RecipeSerializer.register("unicopia:jar_extract", new SpecialRecipeSerializer<>(JarExtractRecipe::new));
     RecipeSerializer<ShapedRecipe> CRAFTING_MAGICAL_SERIALIZER = RecipeSerializer.register("unicopia:crafting_magical", new SpellShapedCraftingRecipe.Serializer());
     RecipeSerializer<SpellCraftingRecipe> TRAIT_REQUIREMENT = RecipeSerializer.register("unicopia:spellbook/crafting", new SpellCraftingRecipe.Serializer());
     RecipeSerializer<SpellEnhancingRecipe> TRAIT_COMBINING = RecipeSerializer.register("unicopia:spellbook/combining", new SpellEnhancingRecipe.Serializer());

src/main/resources/data/unicopia/recipes/filled_jar_emptied.json

@@ -0,0 +1,3 @@
+{
+  "type": "unicopia:jar_extract"
+}