Adapt inventory to new catalog interface

This also does a major restructuring of the inventory mutate form.

Some things still are not as they should be, but it mostly works like
before. They can be fixed later.

Co-authored-by: Theo Reichert <theo.reichert@mailbox.tu-dresden.de>

src/main/asciidoc/models/design/inventory.puml

@@ -18,8 +18,7 @@ package Salespoint {
 
 package catering {
   package catalog {
-    interface ConsumableCatalog
+    interface CateringCatalog
-    interface RentableCatalog
   }
 
   package inventory {
@@ -27,16 +26,21 @@ package catering {
       + InventoryController(inventory : UniqueInventory)
       + list(model : Model) : String
       + edit(model : Model, pid : Product) : String
-      + edit(model : Model, form : InventoryMutateForm) : String
+      + edit(model : Model, pid : Product, form : InventoryMutateForm) : String
+      + editConsumable(form: ConsumableMutateForm, result: Errors, pid : Product, model : Model) : String
+      + editRentable(form: RentableMutateForm, result: Errors, pid : Product, model : Model) : String
       + edit(form : InventoryMutateForm, result : Errors, pid : Product, model : Model) : String
-      + add(model : Model) : String
+      + add(model : Model, type : String) : String
       + add(model : Model, form : InventoryMutateForm) : String
+      + addConsumable(form : ConsumableMutateForm, result : Errors, model : Model) : String
+      + addRentable(form : RentableMutateForm, result : Errors, model : Model) : String
       + add(form : InventoryMutateForm, result : Errors, model : Model) : String
       + delete(pid : Product) : String
     }
-    InventoryController --> "1" catering.catalog.ConsumableCatalog : "-consumableCatalog"
+    InventoryController --> "1" catering.catalog.CateringCatalog : "-cateringCatalog"
-    InventoryController --> "1" catering.catalog.RentableCatalog : "-rentableCatalog"
     InventoryController ..> InventoryMutateForm
+    InventoryController ..> ConsumableMutateForm
+    InventoryController ..> RentableMutateForm
     InventoryController .u.> Salespoint.Product
     InventoryController -u-> "1" Salespoint.UniqueInventory : "-inventory"
     InventoryController .u.> Salespoint.UniqueInventoryItem
@@ -48,13 +52,28 @@ package catering {
       + InventoryInitializer(inventory : UniqueInventory, catalog : CateringCatalog)
       + initialize() : void
     }
-    InventoryInitializer --> "1" catering.catalog.ConsumableCatalog : "-consumableCatalog"
+    InventoryInitializer --> "1" catering.catalog.CateringCatalog : "-cateringCatalog"
-    InventoryInitializer --> "1" catering.catalog.RentableCatalog : "-rentableCatalog"
     InventoryInitializer .u.|> Salespoint.DataInitializer
     InventoryInitializer .u.> Salespoint.Quantity
     InventoryInitializer -u-> "1" Salespoint.UniqueInventory : "-inventory"
     InventoryInitializer .u.> Salespoint.UniqueInventoryItem
     InventoryInitializer .u.> Spring.Assert
+
+    class InventoryMutateForm
+    class ConsumableMutateForm
+    class RentableMutateForm
+    ConsumableMutateForm <|-- InventoryMutateForm
+    RentableMutateForm <|-- InventoryMutateForm
+
+    InventoryMutateForm ..> Salespoint.Quantity
+
+    InventoryMutateForm ..> Salespoint.Product
+    ConsumableMutateForm ..> Salespoint.Product
+    RentableMutateForm ..> Salespoint.Product
+
+    InventoryMutateForm ..> Salespoint.UniqueInventoryItem
+    ConsumableMutateForm ..> Salespoint.UniqueInventoryItem
+    RentableMutateForm ..> Salespoint.UniqueInventoryItem
   }
 }
 @enduml

src/main/java/catering/catalog/CatalogDataInitializer.java

@@ -18,12 +18,17 @@ package catering.catalog;
 
 import static org.salespointframework.core.Currencies.EURO;
 
+import java.util.Set;
+import java.util.Optional;
+
 import org.javamoney.moneta.Money;
 import org.salespointframework.core.DataInitializer;
 import org.springframework.core.annotation.Order;
 import org.springframework.stereotype.Component;
 import org.springframework.util.Assert;
 
+import catering.order.OrderType;
+
 @Component
 @Order(20)
 class CatalogDataInitializer implements DataInitializer {
@@ -41,9 +46,21 @@ class CatalogDataInitializer implements DataInitializer {
 			return;
 		}
 
-		cateringCatalog.save(new CatalogDummy("Brötchen Vollkorn", CatalogDummyType.CONSUMABLE, Money.of(1, EURO), Money.of(0.5, EURO),
+		cateringCatalog.save(new Consumable(
-				Money.of(0.75, EURO)));
+				"Brötchen Vollkorn",
-		cateringCatalog.save(new CatalogDummy("Kerze Rot", CatalogDummyType.CONSUMABLE, Money.of(2, EURO), Money.of(1.5, EURO)));
+				Money.of(1, EURO),
-		cateringCatalog.save(new CatalogDummy("Brotschneidemaschine Power X 3000", CatalogDummyType.RENTABLE, Money.of(25, EURO), Money.of(10000, EURO)));
+				Money.of(0.5, EURO),
+				Optional.of(Money.of(0.75, EURO)),
+				Set.of(OrderType.EVENT_CATERING, OrderType.MOBILE_BREAKFAST)));
+		cateringCatalog.save(new Rentable(
+				"Kerze Rot",
+				Money.of(2, EURO),
+				Money.of(1.5, EURO),
+				Set.of(OrderType.EVENT_CATERING, OrderType.MOBILE_BREAKFAST)));
+		cateringCatalog.save(new Rentable(
+				"Brotschneidemaschine Power X 3000",
+				Money.of(25, EURO),
+				Money.of(10000, EURO),
+				Set.of(OrderType.EVENT_CATERING, OrderType.MOBILE_BREAKFAST)));
 	}
 }

src/main/java/catering/catalog/CatalogDummy.java

@@ -1,79 +0,0 @@
-/*
- * Copyright (C) 2023 Simon Bruder
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package catering.catalog;
-
-import javax.money.MonetaryAmount;
-
-import org.salespointframework.catalog.Product;
-import org.springframework.util.Assert;
-
-import jakarta.persistence.Entity;
-
-@Entity
-public class CatalogDummy extends Product {
-	MonetaryAmount wholesalePrice;
-	// Optional<MonetaryAmount> promotionPrice;
-	// enterprise java goes brrr
-	MonetaryAmount promotionPrice;
-	CatalogDummyType type;
-
-	// enterprise java goes brrr
-	@SuppressWarnings({ "unused", "deprecation" })
-	private CatalogDummy() {
-	}
-
-	public CatalogDummy(String name, CatalogDummyType type, MonetaryAmount price, MonetaryAmount wholesalePrice,
-			MonetaryAmount promotionPrice) {
-		super(name, price);
-		Assert.notNull(type, "Type must not be null!");
-		Assert.notNull(wholesalePrice, "WholesalePricee must not be null!");
-		// PromotionPrice can be null.
-		this.type = type;
-		this.wholesalePrice = wholesalePrice;
-		this.promotionPrice = promotionPrice;
-	}
-
-	public CatalogDummy(String name, CatalogDummyType type, MonetaryAmount price, MonetaryAmount wholesalePrice) {
-		this(name, type, price, wholesalePrice, null);
-	}
-
-	public MonetaryAmount getWholesalePrice() {
-		return wholesalePrice;
-	}
-
-	public void setWholesalePrice(MonetaryAmount wholesalePrice) {
-		Assert.notNull(wholesalePrice, "WholesalePricee must not be null!");
-		this.wholesalePrice = wholesalePrice;
-	}
-
-	public MonetaryAmount getPromotionPrice() {
-		return promotionPrice;
-	}
-
-	public void setPromotionPrice(MonetaryAmount promotionPrice) {
-		this.promotionPrice = promotionPrice;
-	}
-
-	public CatalogDummyType getType() {
-		return this.type;
-	}
-
-	public void setType(CatalogDummyType type) {
-		Assert.notNull(type, "Type must not be null!");
-		this.type = type;
-	}
-}

src/main/java/catering/catalog/CatalogDummyType.java

@@ -1,22 +0,0 @@
-/*
- * Copyright (C) 2023 Simon Bruder
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package catering.catalog;
-
-public enum CatalogDummyType {
-	CONSUMABLE,
-	RENTABLE,
-}

src/main/java/catering/inventory/ConsumableMutateForm.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2023 Simon Bruder
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package catering.inventory;
+
+import static org.salespointframework.core.Currencies.EURO;
+
+import java.util.Optional;
+import java.util.Set;
+
+import javax.money.MonetaryAmount;
+import javax.money.NumberValue;
+
+import org.javamoney.moneta.Money;
+import org.salespointframework.catalog.Product;
+import org.salespointframework.inventory.UniqueInventoryItem;
+
+import catering.catalog.Consumable;
+import catering.order.OrderType;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.PositiveOrZero; // NonNegative in enterprise java
+
+class ConsumableMutateForm extends InventoryMutateForm {
+	private @NotNull @PositiveOrZero Double wholesalePrice;
+	private @NotNull Optional<@PositiveOrZero Double> promotionPrice = Optional.empty();
+
+	public Double getWholesalePrice() {
+		return wholesalePrice;
+	}
+
+	public Optional<Double> getPromotionPrice() {
+		return promotionPrice;
+	}
+
+	public void setWholesalePrice(Double wholesalePrice) {
+		this.wholesalePrice = wholesalePrice;
+	}
+
+	public void setPromotionPrice(Optional<Double> promotionPrice) {
+		this.promotionPrice = promotionPrice;
+	}
+
+	@Override
+	public Product toProduct() {
+		return new Consumable(
+				getName(),
+				Money.of(getRetailPrice(), EURO),
+				Money.of(getWholesalePrice(), EURO),
+				getPromotionPrice().map(price -> Money.of(price, EURO)),
+				// FIXME: categories for creation of consumables are hardcoded
+				Set.of(OrderType.EVENT_CATERING, OrderType.MOBILE_BREAKFAST));
+	}
+
+	public static ConsumableMutateForm of(Consumable product, UniqueInventoryItem item) {
+		ConsumableMutateForm form = new ConsumableMutateForm();
+		form.setName(product.getName());
+		form.setQuantity(item.getQuantity());
+		form.setWholesalePrice(product.getWholesalePrice().getNumber().doubleValueExact());
+		form.setRetailPrice(product.getRetailPrice().getNumber().doubleValueExact());
+		form.setPromotionPrice(
+				product.getPromotionPrice().map(MonetaryAmount::getNumber).map(NumberValue::doubleValueExact));
+		return form;
+	}
+
+	@Override
+	protected void modifyProductPrimitive(Product product) {
+		if (product instanceof Consumable consumable) {
+			consumable.setWholesalePrice(Money.of(getWholesalePrice(), EURO));
+			consumable.setPromotionPrice(getPromotionPrice().map(price -> Money.of(price, EURO)));
+		} else {
+			throw new IllegalArgumentException("ConsumableMutateForm can only modify instances of Consumable");
+		}
+	}
+}

src/main/java/catering/inventory/InventoryController.java

@@ -16,14 +16,6 @@
  */
 package catering.inventory;
 
-import static org.salespointframework.core.Currencies.EURO;
-
-import java.util.Optional;
-
-import javax.money.MonetaryAmount;
-import javax.money.NumberValue;
-
-import org.javamoney.moneta.Money;
 import org.salespointframework.catalog.Product;
 import org.salespointframework.inventory.UniqueInventory;
 import org.salespointframework.inventory.UniqueInventoryItem;
@@ -36,11 +28,35 @@ import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 
-import catering.catalog.CatalogDummy;
 import catering.catalog.CateringCatalog;
 import jakarta.validation.Valid;
 
+/*
+ * TODO TL;DR: Use HandlerMethodArgumentResolver
+ *
+ * This class currently has many confusing methods that do a variety of things,
+ * but mostly work around polymorphic restrictions of Spring.
+ * Ideally, spring would allow a form to be polymorphic
+ * based on its attributes, if they are unique,
+ * or based on another parameter.
+ * From what I could find,
+ * this is not possible without implementing a custom HandlerMethodArgumentResolver.
+ * If there is time, the controller should be changed to use this,
+ * which should vastly simplify it.
+ *
+ * Adding will always require a type parameter,
+ * as the type is not known at first.
+ * However, currently there are two (or even three) POST handlers,
+ * as there are two different form types it must support
+ * (and an infinite amount of invalid types that it should ignore).
+ *
+ * Editing should not require passing any additional type parameter around
+ * as the type can be inferred from the product.
+ * Changing the type of a product should not be possible.
+ */
+
 @Controller
 class InventoryController {
 	private final UniqueInventory<UniqueInventoryItem> inventory;
@@ -64,17 +80,10 @@ class InventoryController {
 	@PreAuthorize("hasRole('ADMIN')")
 	@GetMapping("/inventory/edit/{pid}")
 	String edit(Model model, @PathVariable Product pid) {
-		CatalogDummy product = (CatalogDummy) pid;
 		UniqueInventoryItem item = inventory.findByProduct(pid).get();
-		return edit(model,
+		final InventoryMutateForm form = InventoryMutateForm.of(pid, item);
-				new InventoryMutateForm(product.getType(),
+
-						product.getName(),
+		return edit(model, form);
-						item.getQuantity(),
-						product.getWholesalePrice().getNumber().doubleValueExact(),
-						product.getPrice().getNumber().doubleValueExact(),
-						Optional.ofNullable(product.getPromotionPrice())
-								.map(MonetaryAmount::getNumber)
-								.map(NumberValue::doubleValueExact)));
 	}
 
 	String edit(Model model, InventoryMutateForm form) {
@@ -85,23 +94,28 @@ class InventoryController {
 	}
 
 	@PreAuthorize("hasRole('ADMIN')")
-	@PostMapping("/inventory/edit/{pid}")
+	@PostMapping(path = "/inventory/edit/{pid}", params = "type=Consumable")
-	String edit(@Valid @ModelAttribute("form") InventoryMutateForm form, Errors result, @PathVariable Product pid,
+	String editConsumable(@Valid @ModelAttribute("form") ConsumableMutateForm form, Errors result,
-			Model model) {
+			@PathVariable Product pid, Model model) {
+		return edit(form, result, pid, model);
+	}
+
+	@PreAuthorize("hasRole('ADMIN')")
+	@PostMapping(path = "/inventory/edit/{pid}", params = "type=Rentable")
+	String editRentable(@Valid @ModelAttribute("form") RentableMutateForm form, Errors result,
+			@PathVariable Product pid, Model model) {
+		return edit(form, result, pid, model);
+	}
+
+	String edit(InventoryMutateForm form, Errors result, Product product, Model model) {
 		if (result.hasErrors()) {
 			return edit(model, form);
 		}
-		CatalogDummy product = (CatalogDummy) pid;
-		UniqueInventoryItem item = inventory.findByProduct(pid).get();
-
-		product.setName(form.getName());
-		product.setType(form.getType());
-		product.setPrice(Money.of(form.getRetailPrice(), EURO));
-		product.setWholesalePrice(Money.of(form.getWholesalePrice(), EURO));
-		product.setPromotionPrice(form.getPromotionPrice().map(price -> Money.of(price, EURO)).orElse(null));
 
+		form.modifyProduct(product);
 		product = cateringCatalog.save(product);
 
+		UniqueInventoryItem item = inventory.findByProduct(product).get();
 		// no setQuantity in enterprise java
 		// (though returing a modified object is actually nice)
 		inventory.save(item.increaseQuantity(form.getQuantity().subtract(item.getQuantity())));
@@ -109,9 +123,17 @@ class InventoryController {
 	}
 
 	@PreAuthorize("hasRole('ADMIN')")
-	@GetMapping("/inventory/add")
+	@GetMapping(path = "/inventory/add")
-	String add(Model model) {
+	String add(Model model, @RequestParam String type) {
-		return add(model, InventoryMutateForm.empty());
+		switch (type) {
+			case "Consumable":
+				return add(model, new ConsumableMutateForm());
+			case "Rentable":
+				return add(model, new RentableMutateForm());
+			default:
+				// TODO better error handling
+				return "redirect:/inventory";
+		}
 	}
 
 	String add(Model model, InventoryMutateForm form) {
@@ -121,17 +143,22 @@ class InventoryController {
 	}
 
 	@PreAuthorize("hasRole('ADMIN')")
-	@PostMapping("/inventory/add")
+	@PostMapping(path = "/inventory/add", params = "type=Consumable")
-	String add(@Valid @ModelAttribute("form") InventoryMutateForm form, Errors result, Model model) {
+	String addConsumable(@Valid @ModelAttribute("form") ConsumableMutateForm form, Errors result, Model model) {
+		return add(form, result, model);
+	}
+
+	@PreAuthorize("hasRole('ADMIN')")
+	@PostMapping(path = "/inventory/add", params = "type=Rentable")
+	String addRentable(@Valid @ModelAttribute("form") ConsumableMutateForm form, Errors result, Model model) {
+		return add(form, result, model);
+	}
+
+	String add(@Valid InventoryMutateForm form, Errors result, Model model) {
 		if (result.hasErrors()) {
 			return add(model, form);
 		}
-		inventory.save(new UniqueInventoryItem(
+		inventory.save(new UniqueInventoryItem(cateringCatalog.save(form.toProduct()), form.getQuantity()));
-				cateringCatalog
-						.save(new CatalogDummy(form.getName(), form.getType(), Money.of(form.getRetailPrice(), EURO),
-								Money.of(form.getWholesalePrice(), EURO),
-								form.getPromotionPrice().map(price -> Money.of(price, EURO)).orElse(null))),
-				form.getQuantity()));
 		return "redirect:/inventory";
 	}
 
@@ -140,7 +167,7 @@ class InventoryController {
 	String delete(@PathVariable Product pid) {
 		UniqueInventoryItem item = inventory.findByProduct(pid).get();
 		inventory.delete(item);
-		cateringCatalog.delete((CatalogDummy) pid);
+		cateringCatalog.delete(pid);
 		return "redirect:/inventory";
 	}
 }

src/main/java/catering/inventory/InventoryMutateForm.java

@@ -16,39 +16,33 @@
  */
 package catering.inventory;
 
-import java.util.Optional;
+import static org.salespointframework.core.Currencies.EURO;
 
+import org.javamoney.moneta.Money;
+import org.salespointframework.catalog.Product;
+import org.salespointframework.inventory.UniqueInventoryItem;
 import org.salespointframework.quantity.Quantity;
 
-import catering.catalog.CatalogDummyType;
+import catering.catalog.Consumable;
+import catering.catalog.Rentable;
 import jakarta.validation.constraints.NotEmpty;
 import jakarta.validation.constraints.NotNull;
 import jakarta.validation.constraints.PositiveOrZero; // NonNegative in enterprise java
 
-class InventoryMutateForm {
+/**
-	private final @NotNull CatalogDummyType type;
+ * Abstract class for handling inventory mutations.
-	private final @NotEmpty String name;
+ *
-	private final @NotNull Quantity quantity;
+ * It has children for every product type.
-	private final @NotNull double wholesalePrice, retailPrice;
+ *
-	private final @NotNull Optional<Double> promotionPrice;
+ * The current implementation requires {@link #forProductType(Class)} and {@link #of(Product, UniqueInventoryItem)}
+ * to also be updated when a new child class is added.
+ */
+abstract class InventoryMutateForm {
+	private @NotEmpty String name;
+	private @NotNull Quantity quantity;
+	private @NotNull @PositiveOrZero Double retailPrice;
 
-	public InventoryMutateForm(@NotNull CatalogDummyType type, @NotEmpty String name,
+	public InventoryMutateForm() {
-			@NotNull Quantity quantity, @PositiveOrZero double wholesalePrice, @PositiveOrZero double retailPrice,
-			@PositiveOrZero Optional<Double> promotionPrice) {
-		this.type = type;
-		this.name = name;
-		this.quantity = quantity;
-		this.wholesalePrice = wholesalePrice;
-		this.retailPrice = retailPrice;
-		this.promotionPrice = promotionPrice;
-	}
-
-	public static InventoryMutateForm empty() {
-		return new InventoryMutateForm(null, "", Quantity.of(0), 0, 0, Optional.empty());
-	}
-
-	public CatalogDummyType getType() {
-		return type;
 	}
 
 	public String getName() {
@@ -59,15 +53,80 @@ class InventoryMutateForm {
 		return quantity;
 	}
 
-	public double getWholesalePrice() {
+	public Double getRetailPrice() {
-		return wholesalePrice;
-	}
-
-	public double getRetailPrice() {
 		return retailPrice;
 	}
 
-	public Optional<Double> getPromotionPrice() {
+	public void setName(String name) {
-		return promotionPrice;
+		this.name = name;
 	}
+
+	public void setQuantity(Quantity quantity) {
+		this.quantity = quantity;
+	}
+
+	public void setRetailPrice(Double retailPrice) {
+		this.retailPrice = retailPrice;
+	}
+
+	/**
+	 * Creates an empty {@link InventoryMutateForm} for {@link Product}s of the given {@link Class}.
+	 *
+	 * @param <T> a child class of {@link Product}
+	 * @param type the concrete {@link Product} the form should mutate
+	 * @return an object of an {@link InventoryMutateForm} subclass
+	 * @throws IllegalArgumentException if the {@literal type} is not supported
+	 */
+	public static <T extends Product> InventoryMutateForm forProductType(Class<T> type) {
+		// Java can’t switch over Class in JDK17 (without preview features)
+		// See https://openjdk.org/jeps/406 for improvement in higher versions.
+		if (type.equals(Consumable.class)) {
+			return new ConsumableMutateForm();
+		} else if (type.equals(Rentable.class)) {
+			return new RentableMutateForm();
+		} else {
+			throw new IllegalArgumentException(
+					"InventoryMutateForm::forProductType not supported for given types");
+		}
+	}
+
+	/**
+	 * Creates a populated {@link InventoryMutateForm} from a given {@link Product} and {@link UniqueInventoryItem}.
+	 *
+	 * @param product an instance of a {@link Product} subclass
+	 * @param item an {@link UniqueInventoryItem} holding a {@link Quantity}
+	 * @return an object of an {@link InventoryMutateForm} subclass
+	 */
+	public static InventoryMutateForm of(Product product, UniqueInventoryItem item) {
+		if (product instanceof Consumable consumable) {
+			return ConsumableMutateForm.of(consumable, item);
+		} else if (product instanceof Rentable rentable) {
+			return RentableMutateForm.of(rentable, item);
+		} else {
+			throw new IllegalArgumentException("InventoryMutateForm::ofProductAndItem not supported for given types");
+		}
+	}
+
+	/**
+	 * Creates a new {@link Product} from a populated {@link InventoryMutateForm}.
+	 *
+	 * @return an instance of a {@link Product} subclass
+	 */
+	public abstract Product toProduct();
+
+	/**
+	 * Modifies a given {@link Product} to match the values from the {@link InventoryMutateForm}.
+	 *
+	 * As the {@link Quantity} is stored inside of the {@link UniqueInventoryItem},
+	 * it has to be updated manually.
+	 *
+	 * @param product the {@link Product} to be updated
+	 */
+	public void modifyProduct(Product product) {
+		product.setName(getName());
+		product.setPrice(Money.of(getRetailPrice(), EURO));
+		modifyProductPrimitive(product);
+	}
+
+	protected abstract void modifyProductPrimitive(Product product);
 }

src/main/java/catering/inventory/RentableMutateForm.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2023 Simon Bruder
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package catering.inventory;
+
+import static org.salespointframework.core.Currencies.EURO;
+
+import java.util.Set;
+
+import org.javamoney.moneta.Money;
+import org.salespointframework.catalog.Product;
+import org.salespointframework.inventory.UniqueInventoryItem;
+
+import catering.catalog.Rentable;
+import catering.order.OrderType;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.PositiveOrZero;
+
+class RentableMutateForm extends InventoryMutateForm {
+	private @NotNull @PositiveOrZero Double wholesalePrice;
+
+	public Double getWholesalePrice() {
+		return wholesalePrice;
+	}
+
+	public void setWholesalePrice(Double wholesalePrice) {
+		this.wholesalePrice = wholesalePrice;
+	}
+
+	public static RentableMutateForm of(Rentable product, UniqueInventoryItem item) {
+		RentableMutateForm form = new RentableMutateForm();
+		form.setName(product.getName());
+		form.setQuantity(item.getQuantity());
+		form.setWholesalePrice(product.getWholesalePrice().getNumber().doubleValueExact());
+		form.setRetailPrice(product.getRetailPrice().getNumber().doubleValueExact());
+		return form;
+	}
+
+	@Override
+	public Product toProduct() {
+		return new Rentable(
+				getName(),
+				Money.of(getRetailPrice(), EURO),
+				Money.of(getWholesalePrice(), EURO),
+				// FIXME: categories for creation of rentables are hardcoded
+				Set.of(OrderType.EVENT_CATERING, OrderType.MOBILE_BREAKFAST));
+	}
+
+	@Override
+	protected void modifyProductPrimitive(Product product) {
+		if (product instanceof Rentable rentable) {
+			rentable.setWholesalePrice(Money.of(getWholesalePrice(), EURO));
+		} else {
+			throw new IllegalArgumentException("RentableMutateForm can only modify instances of Rentable");
+		}
+	}
+}

src/main/resources/templates/inventory-mutate.html

@@ -7,12 +7,9 @@
 		<div layout:fragment="content">
 			<h2 th:text="${'Produkt ' + (actionIsAdd ? 'anlegen' : 'bearbeiten')}"></h2>
 			<form method="post" th:object="${form}">
-				<div class="mb-3">
+				<div class="mb-3" th:if="${actionIsAdd}">
-					<label class="form-label" for="type">Typ</label>
+					<a th:href="@{/inventory/add?type=Consumable}" class="btn" th:classappend="${form.getClass().getSimpleName() == 'ConsumableMutateForm' ? 'btn-primary' : 'btn-secondary'}">Verbrauchsmaterial</a>
-					<div class="form-check form-check-inline" th:each="type : ${T(catering.catalog.CatalogDummyType).values()}">
+					<a th:href="@{/inventory/add?type=Rentable}" class="btn" th:classappend="${form.getClass().getSimpleName() == 'RentableMutateForm' ? 'btn-primary' : 'btn-secondary'}">Leihmaterial</a>
-						<input class="form-check-input" type="radio" th:field="*{type}" th:value="${type}" th:text="${type}" th:errorclass="is-invalid" required/>
-						<div th:if="${#fields.hasErrors('type')}" class="invalid-feedback">Ungültiger Typ.</div>
-					</div>
 				</div>
 				<div class="mb-3">
 					<label class="form-label" for="name">Produktname</label>
@@ -35,8 +32,7 @@
 					<input class="form-control" type="number" name="retailPrice" th:value="${#numbers.formatDecimal(form.retailPrice, 1, 2)}" th:errorclass="is-invalid" step="0.01" min="0" required/>
 					<div th:if="${#fields.hasErrors('retailPrice')}" class="invalid-feedback">Ungültiger Verkaufspreis.</div>
 				</div>
-				<div class="mb-3">
+				<div class="mb-3" th:if="${form.getClass().getSimpleName() == 'ConsumableMutateForm'}">
-					<!-- FIXME darf nur bei angeboten als teil von partyservice angezeigt werden -->
 					<label class="form-label" for="promotionPrice">Aktionspreis</label>
 					<input class="form-control" type="number" name="promotionPrice" th:value="${#numbers.formatDecimal(form.promotionPrice.orElse(null), 1, 2)}" th:errorclass="is-invalid" step="0.01" min="0"/>
 					<div th:if="${#fields.hasErrors('promotionPrice')}" class="invalid-feedback">Ungültiger Aktionspreis.</div>

src/main/resources/templates/inventory.html

@@ -24,17 +24,18 @@
 						<td th:text="${item.product.name}"></td>
 						<td th:text="${item.quantity}"></td>
 						<td th:text="${item.product.wholesalePrice}"></td>
-						<td th:if="${item.product.promotionPrice != null}"><del th:text="${item.product.price}"></del> <span th:text="${item.product.promotionPrice}"></span></td>
+						<td th:if="${item.product.getClass().getSimpleName() == 'Consumable' && item.product.promotionPrice.isPresent()}"><del th:text="${item.product.retailPrice}"></del> <span th:text="${item.product.promotionPrice.get()}"></span></td>
-						<td th:if="${item.product.promotionPrice == null}" th:text="${item.product.price}"></td>
+						<td th:if="${item.product.getClass().getSimpleName() != 'Consumable' || item.product.promotionPrice.isEmpty()}" th:text="${item.product.price}"></td>
 						<td th:text="${item.product.wholesalePrice.multiply(item.quantity.getAmount())}"></td>
 						<td>
-							<a th:href="@{/inventory/edit/{id}(id=${item.product.id})}"><button class="btn btn-warning">Bearbeiten</button></a>
+							<a th:href="@{/inventory/edit/{id}(id=${item.product.id},type=${item.product.getClass().getSimpleName()})}"><button class="btn btn-warning">Bearbeiten</button></a>
 							<a th:href="@{/inventory/delete/{id}(id=${item.product.id})}"><button class="btn btn-danger">Entfernen</button></a>
 						</td>
 					</tr>
 				</tbody>
 			</table>
-			<a href="/inventory/add"><button class="btn btn-primary">Artikel hinzufügen</button></a>
+			<a href="/inventory/add?type=Consumable"><button class="btn btn-primary">Verbrauchsmaterial hinzufügen</button></a>
+			<a href="/inventory/add?type=Rentable"><button class="btn btn-primary">Leihmaterial hinzufügen</button></a>
 		</div>
 	</body>
 </html>

src/test/java/catering/inventory/InventoryControllerIntegrationTests.java

@@ -19,8 +19,8 @@ package catering.inventory;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.tuple;
 import static org.hamcrest.CoreMatchers.containsString;
-import static org.hamcrest.CoreMatchers.not;
 import static org.hamcrest.CoreMatchers.endsWith;
+import static org.hamcrest.CoreMatchers.not;
 import static org.salespointframework.core.Currencies.EURO;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
@@ -29,9 +29,12 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.redirectedUrl;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
+import java.util.Optional;
+
 import org.javamoney.moneta.Money;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.salespointframework.catalog.Product;
 import org.salespointframework.catalog.Product.ProductIdentifier;
 import org.salespointframework.inventory.UniqueInventory;
 import org.salespointframework.inventory.UniqueInventoryItem;
@@ -44,8 +47,7 @@ import org.springframework.security.test.context.support.WithMockUser;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.ResultActions;
 
-import catering.catalog.CatalogDummy;
+import catering.catalog.Consumable;
-import catering.catalog.CatalogDummyType;
 
 @AutoConfigureMockMvc
 @SpringBootTest
@@ -57,13 +59,13 @@ class InventoryControllerIntegrationTests {
 	UniqueInventory<UniqueInventoryItem> inventory;
 
 	UniqueInventoryItem anyInventoryItem;
-	CatalogDummy anyProduct;
+	Product anyProduct;
 	ProductIdentifier anyPid;
 
 	@BeforeEach
 	void populateAnyInventoryItem() {
 		anyInventoryItem = inventory.findAll().stream().findAny().get();
-		anyProduct = (CatalogDummy) anyInventoryItem.getProduct();
+		anyProduct = anyInventoryItem.getProduct();
 		anyPid = anyProduct.getId();
 	}
 
@@ -77,15 +79,15 @@ class InventoryControllerIntegrationTests {
 
 	@Test
 	@WithMockUser(username = "admin", roles = "ADMIN")
-	void adminCanAdd() throws Exception {
+	void adminCanAddConsumable() throws Exception {
-		mvc.perform(get("/inventory/add"))
+		mvc.perform(get("/inventory/add?type=Consumable"))
 				.andExpect(status().isOk())
 				.andExpect(content().string(containsString("Produkt anlegen")));
 
 		long itemCountBefore = inventory.findAll().stream().count();
 
-		mvc.perform(post("/inventory/add")
+		mvc.perform(post("/inventory/add?type=Consumable")
-				.param("type", "CONSUMABLE")
+				.queryParam("type", Consumable.class.getSimpleName())
 				.param("name", "MOCK Schnitzel Wiener Art (vegan)")
 				.param("quantity", "100")
 				.param("wholesalePrice", "3.00")
@@ -97,12 +99,11 @@ class InventoryControllerIntegrationTests {
 
 		assertThat(itemCountAfter).isEqualTo(itemCountBefore + 1);
 
-		// TODO: this must be changed once the catalog split is done
+		assertThat(inventory.findAll().filter(ie -> ie.getProduct() instanceof Consumable).stream())
-		assertThat(inventory.findAll().stream())
+				.extracting("product.name", "quantity", "product.wholesalePrice", "product.retailPrice",
-				.extracting("product.type", "product.name", "quantity", "product.wholesalePrice", "product.price",
 						"product.promotionPrice")
-				.contains(tuple(CatalogDummyType.CONSUMABLE, "MOCK Schnitzel Wiener Art (vegan)", Quantity.of(100),
+				.contains(tuple("MOCK Schnitzel Wiener Art (vegan)", Quantity.of(100),
-						Money.of(3, EURO), Money.of(7.5, EURO), Money.of(6.66, EURO)));
+						Money.of(3, EURO), Money.of(7.5, EURO), Optional.of(Money.of(6.66, EURO))));
 	}
 
 	@Test
@@ -117,54 +118,52 @@ class InventoryControllerIntegrationTests {
 
 		assertThat(itemCountAfter).isEqualTo(itemCountBefore - 1);
 
-		// TODO: this must be changed once the catalog split is done
 		assertThat(inventory.findAll().stream())
-				.extracting("product.type", "product.name", "quantity")
+				.extracting("product.name", "quantity")
-				.doesNotContain(tuple(anyProduct.getType(), anyProduct.getName(), anyInventoryItem.getQuantity()));
+				.doesNotContain(tuple(anyProduct.getName(), anyInventoryItem.getQuantity()));
 	}
 
 	@Test
 	@WithMockUser(username = "admin", roles = "ADMIN")
 	void adminCanEditConsumable() throws Exception {
-		// TODO: this must be changed once the catalog split is done
+		Consumable anyConsumable = inventory.findAll().stream()
-		CatalogDummy anyConsumable = inventory.findAll().stream()
 				.map(UniqueInventoryItem::getProduct)
-				.map(p -> (CatalogDummy) p)
+				.filter(Consumable.class::isInstance)
-				.filter(cd -> cd.getType().equals(CatalogDummyType.CONSUMABLE))
+				.map(Consumable.class::cast)
 				.findAny()
 				.get();
 
-		mvc.perform(get("/inventory/edit/" + anyConsumable.getId()))
+		mvc.perform(
+				get("/inventory/edit/" + anyConsumable.getId()))
 				.andExpect(status().isOk())
 				.andExpect(content().string(containsString("Produkt bearbeiten")));
 
-		boolean hasPromotionPrice = anyConsumable.getPromotionPrice() != null;
-
 		mvc.perform(post("/inventory/edit/" + anyConsumable.getId())
+				.queryParam("type", Consumable.class.getSimpleName())
 				.param("type", "CONSUMABLE")
 				.param("name", "MOCK edited")
 				.param("quantity", "4711")
 				.param("wholesalePrice", "0.01")
-				.param("retailPrice", "0.01")
+				.param("retailPrice", "0.03")
-				.param("promotionPrice", hasPromotionPrice ? "" : "5"))
+				.param("promotionPrice", "0.02"))
 				.andExpect(redirectedUrl("/inventory"));
 
 		UniqueInventoryItem editedInventoryItem = inventory.findByProductIdentifier(anyConsumable.getId()).stream()
 				.findAny().get();
-		CatalogDummy editedProduct = (CatalogDummy) editedInventoryItem.getProduct();
+		Consumable editedProduct = (Consumable) editedInventoryItem.getProduct();
 
 		assertThat(editedInventoryItem.getQuantity()).isEqualTo(Quantity.of(4711));
 		assertThat(editedProduct)
-				.extracting("type", "name", "wholesalePrice", "price", "promotionPrice")
+				.extracting("name", "wholesalePrice", "retailPrice", "promotionPrice")
-				.containsExactly(CatalogDummyType.CONSUMABLE, "MOCK edited", Money.of(0.01, EURO),
+				.containsExactly("MOCK edited", Money.of(0.01, EURO),
-						Money.of(0.01, EURO), hasPromotionPrice ? null : Money.of(0.01, EURO));
+						Money.of(0.03, EURO), Optional.of(Money.of(0.02, EURO)));
 	}
 
 	@Test
 	@WithMockUser(username = "admin", roles = "ADMIN")
 	void invalidAddReturnsNiceError() throws Exception {
 		mvc.perform(post("/inventory/add")
-				.param("type", "CONSUMABLE")
+				.queryParam("type", Consumable.class.getSimpleName())
 				.param("name", "")
 				.param("quantity", "10")
 				.param("wholesalePrice", "1.00")
@@ -176,7 +175,7 @@ class InventoryControllerIntegrationTests {
 	@WithMockUser(username = "admin", roles = "ADMIN")
 	void missingRetailPriceIsNoError() throws Exception {
 		mvc.perform(post("/inventory/add")
-				.param("type", "CONSUMABLE")
+				.queryParam("type", Consumable.class.getSimpleName())
 				.param("name", "MOCK")
 				.param("quantity", "10")
 				.param("wholesalePrice", "1.00")
@@ -188,7 +187,7 @@ class InventoryControllerIntegrationTests {
 	@WithMockUser(username = "admin", roles = "ADMIN")
 	void invalidEditReturnsNiceError() throws Exception {
 		mvc.perform(post("/inventory/edit/" + anyPid)
-				.param("type", "CONSUMABLE")
+				.queryParam("type", Consumable.class.getSimpleName())
 				.param("name", "")
 				.param("quantity", "10")
 				.param("wholesalePrice", "1.00")
@@ -220,22 +219,25 @@ class InventoryControllerIntegrationTests {
 
 	@Test
 	void disallowUnauthorizedEditPage() throws Exception {
-		assertRedirectsToLogin(mvc.perform(get("/inventory/edit/" + anyPid)));
+		assertRedirectsToLogin(
+				mvc.perform(get("/inventory/edit/" + anyPid).queryParam("type", Consumable.class.getSimpleName())));
 	}
 
 	@Test
 	void disallowUnauthorizedEdit() throws Exception {
-		assertRedirectsToLogin(mvc.perform(post("/inventory/edit/" + anyPid)));
+		assertRedirectsToLogin(
+				mvc.perform(post("/inventory/edit/" + anyPid).queryParam("type", Consumable.class.getSimpleName())));
 	}
 
 	@Test
 	void disallowUnauthorizedAddPage() throws Exception {
-		assertRedirectsToLogin(mvc.perform(get("/inventory/add")));
+		assertRedirectsToLogin(mvc.perform(get("/inventory/add").queryParam("type", Consumable.class.getSimpleName())));
 	}
 
 	@Test
 	void disallowUnauthorizedAdd() throws Exception {
-		assertRedirectsToLogin(mvc.perform(post("/inventory/add")));
+		assertRedirectsToLogin(
+				mvc.perform(post("/inventory/add").queryParam("type", Consumable.class.getSimpleName())));
 	}
 
 	@Test