added the ability to clear modules by putting them in the crafting grid

src/main/java/de/ellpeck/prettypipes/Registry.java

@@ -4,6 +4,7 @@ import de.ellpeck.prettypipes.entities.PipeFrameEntity;
 import de.ellpeck.prettypipes.entities.PipeFrameRenderer;
 import de.ellpeck.prettypipes.items.*;
 import de.ellpeck.prettypipes.misc.ItemEquality;
+import de.ellpeck.prettypipes.misc.ModuleClearingRecipe;
 import de.ellpeck.prettypipes.network.PipeNetwork;
 import de.ellpeck.prettypipes.packets.PacketHandler;
 import de.ellpeck.prettypipes.pipe.IPipeConnectable;
@@ -189,6 +190,10 @@ public final class Registry {
                             .forEach(b -> output.accept(b.getValue()))).build()
             );
         });
+
+        event.register(ForgeRegistries.Keys.RECIPE_SERIALIZERS, h -> {
+            h.register(new ResourceLocation(PrettyPipes.ID, "module_clearing"), ModuleClearingRecipe.SERIALIZER);
+        });
     }
 
     private static <T extends AbstractPipeContainer<?>> MenuType<T> registerPipeContainer(RegisterEvent.RegisterHelper<MenuType<?>> helper, String name) {
@@ -229,5 +234,7 @@ public final class Registry {
             MenuScreens.register(Registry.craftingModuleContainer, CraftingModuleGui::new);
             MenuScreens.register(Registry.filterModifierModuleContainer, FilterModifierModuleGui::new);
         }
+
     }
+
 }

src/main/java/de/ellpeck/prettypipes/misc/ModuleClearingRecipe.java

@@ -0,0 +1,50 @@
+package de.ellpeck.prettypipes.misc;
+
+import de.ellpeck.prettypipes.items.IModule;
+import net.minecraft.core.RegistryAccess;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.inventory.CraftingContainer;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.crafting.*;
+import net.minecraft.world.level.Level;
+
+public class ModuleClearingRecipe extends CustomRecipe {
+
+    public static final RecipeSerializer<ModuleClearingRecipe> SERIALIZER = new SimpleCraftingRecipeSerializer<>(ModuleClearingRecipe::new);
+
+    public ModuleClearingRecipe(ResourceLocation res, CraftingBookCategory cat) {
+        super(res, cat);
+    }
+
+    @Override
+    public boolean matches(CraftingContainer container, Level level) {
+        var foundModule = false;
+        for (var stack : container.getItems()) {
+            if (!foundModule && stack.getItem() instanceof IModule) {
+                foundModule = true;
+            } else if (!stack.isEmpty()) {
+                return false;
+            }
+        }
+        return foundModule;
+    }
+
+    @Override
+    public ItemStack assemble(CraftingContainer container, RegistryAccess access) {
+        var module = container.getItems().stream().filter(i -> i.getItem() instanceof IModule).findFirst().orElse(ItemStack.EMPTY);
+        if (!module.isEmpty())
+            module = new ItemStack(module.getItem());
+        return module;
+    }
+
+    @Override
+    public boolean canCraftInDimensions(int x, int y) {
+        return x >= 1 && y >= 1;
+    }
+
+    @Override
+    public RecipeSerializer<?> getSerializer() {
+        return ModuleClearingRecipe.SERIALIZER;
+    }
+
+}

src/main/resources/data/prettypipes/recipes/module_clearing.json

@@ -0,0 +1,4 @@
+{
+    "type": "prettypipes:module_clearing",
+    "category": "misc"
+}