mirror of
https://github.com/st-tu-dresden-praktikum/swt23w23
synced 2024-06-04 14:23:42 +02:00
Simon Bruder
bac025fd0a
This finally makes the licensing under AGPL-3.0-or-later explicit after I got the okay from the kickstart source owners. This also checks the REUSE compliance in a pre commit hook, and therefore also in CI.
267 lines
9.3 KiB
Java
267 lines
9.3 KiB
Java
// SPDX-License-Identifier: AGPL-3.0-or-later
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// SPDX-FileCopyrightText: 2023 swt23w23
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package catering.inventory;
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import org.salespointframework.catalog.Product;
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import org.salespointframework.inventory.UniqueInventory;
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import org.salespointframework.inventory.UniqueInventoryItem;
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import org.springframework.security.access.prepost.PreAuthorize;
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import org.springframework.stereotype.Controller;
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import org.springframework.ui.Model;
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import org.springframework.util.Assert;
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import org.springframework.validation.Errors;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.ModelAttribute;
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import org.springframework.web.bind.annotation.PathVariable;
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import org.springframework.web.bind.annotation.PostMapping;
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import org.springframework.web.bind.annotation.RequestParam;
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import catering.catalog.CateringCatalog;
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import catering.catalog.Consumable;
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import catering.catalog.Rentable;
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import jakarta.validation.Valid;
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/*
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* TODO TL;DR: Use HandlerMethodArgumentResolver
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*
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* This class currently has many confusing methods that do a variety of things,
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* but mostly work around polymorphic restrictions of Spring.
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* Ideally, spring would allow a form to be polymorphic
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* based on its attributes, if they are unique,
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* or based on another parameter.
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* From what I could find,
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* this is not possible without implementing a custom HandlerMethodArgumentResolver.
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* If there is time, the controller should be changed to use this,
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* which should vastly simplify it.
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*
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* Adding will always require a type parameter,
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* as the type is not known at first.
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* However, currently there are two (or even three) POST handlers,
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* as there are two different form types it must support
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* (and an infinite amount of invalid types that it should ignore).
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*
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* Editing should not require passing any additional type parameter around
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* as the type can be inferred from the product.
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* Changing the type of a product should not be possible.
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*/
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@Controller
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@PreAuthorize("hasRole('ADMIN')")
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class InventoryController {
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private final UniqueInventory<UniqueInventoryItem> inventory;
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private final CateringCatalog cateringCatalog;
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InventoryController(UniqueInventory<UniqueInventoryItem> inventory, CateringCatalog cateringCatalog) {
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Assert.notNull(inventory, "Inventory must not be null!");
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Assert.notNull(inventory, "CateringCatalog must not be null!");
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this.inventory = inventory;
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this.cateringCatalog = cateringCatalog;
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}
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/**
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* Lists all inventory products.
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*
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* @param model an instance of {@link Model}
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* @return the inventory template
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*/
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@GetMapping("/inventory")
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String list(Model model) {
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model.addAttribute("inventory", inventory.findAll());
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return "inventory";
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}
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/**
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* Returns the edit page for an inventory product.
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*
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* @param model an instance of {@link Model}
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* @param pid the {@link Product} to edit
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* @return the inventory-mutate template with the {@link Product} data prefilled
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*/
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@GetMapping("/inventory/edit/{pid}")
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String edit(Model model, @PathVariable Product pid) {
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UniqueInventoryItem item = inventory.findByProduct(pid).get();
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final InventoryMutateForm form = InventoryMutateForm.of(pid, item);
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return edit(model, form);
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}
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/**
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* Returns the edit page for an inventory product.
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*
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* This method is not mapped,
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* but is used by other methods to generalise the display of the edit page.
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*
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* @param model an instance of {@link Model}
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* @param form an already filled or empty {@link InventoryMutateForm}
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* @return the inventory-mutate template with the {@link InventoryMutateForm}
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* data prefilled
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*/
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String edit(Model model, InventoryMutateForm form) {
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model.addAttribute("actionIsAdd", false);
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model.addAttribute("form", form);
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return "inventory-mutate";
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}
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/**
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* Edits a consumable.
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*
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* @param form a user-filled {@link ConsumableMutateForm}
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* @param errors an {@link Errors} object including validation errors
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* @param pid the {@link Product} to edit
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* @param model an instance of {@link Model}
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* @return a redirect on success, otherwise the filled form with all errors
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* highlighted
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*/
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@PostMapping(path = "/inventory/edit/{pid}", params = "type=Consumable")
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String editConsumable(@Valid @ModelAttribute("form") ConsumableMutateForm form, Errors result,
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@PathVariable Consumable pid, Model model) {
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return edit(form, result, pid, model);
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}
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/**
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* Edits a rentable.
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*
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* @param form a user-filled {@link RentableMutateForm}
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* @param errors an {@link Errors} object including validation errors
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* @param pid the {@link Product} to edit
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* @param model an instance of {@link Model}
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* @return a redirect on success, otherwise the filled form with all errors
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* highlighted
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*/
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@PostMapping(path = "/inventory/edit/{pid}", params = "type=Rentable")
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String editRentable(@Valid @ModelAttribute("form") RentableMutateForm form, Errors result,
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@PathVariable Rentable pid, Model model) {
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return edit(form, result, pid, model);
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}
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/**
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* Edits an inventory product.
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*
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* This method is not mapped,
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* but is used by
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* {@link #editConsumable(ConsumableMutateForm, Errors, Consumable, Model)}
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* and {@link #editRentable(RentableMutateForm, Errors, Rentable, Model)}
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* to generalise the editing of products.
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*
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* @param form a user-filled {@link RentableMutateForm}
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* @param errors an {@link Errors} object including validation errors
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* @param product the {@link Product} to edit
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* @param model an instance of {@link Model}
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* @return a redirect on success, otherwise the filled form with all errors
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* highlighted
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*/
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String edit(InventoryMutateForm form, Errors result, Product product, Model model) {
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if (result.hasErrors()) {
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return edit(model, form);
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}
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form.modifyProduct(product);
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product = cateringCatalog.save(product);
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UniqueInventoryItem item = inventory.findByProduct(product).get();
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// no setQuantity in enterprise java
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// (though returing a modified object is actually nice)
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inventory.save(item.increaseQuantity(form.getQuantity().subtract(item.getQuantity())));
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return "redirect:/inventory";
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}
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/**
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* Returns the add page for a new inventory product.
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*
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* @param model an instance of {@link org.springframework.ui.Model}
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* @param type string representation of a {@link Product} subclass supported by
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* {@link InventoryMutateForm}
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* @return the inventory-mutate template with no data prefilled
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*/
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@GetMapping(path = "/inventory/add")
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String add(Model model, @RequestParam String type) {
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switch (type) {
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case "Consumable":
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return add(model, new ConsumableMutateForm());
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case "Rentable":
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return add(model, new RentableMutateForm());
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default:
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// TODO better error handling
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return "redirect:/inventory";
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}
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}
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/**
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* Returns the add page for a new inventory product.
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*
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* This method is not mapped,
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* but is used by other methods to generalise the display of the add page.
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*
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* @param model an instance of {@link Model}
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* @param form an already filled or empty {@link InventoryMutateForm}
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* @return the inventory-mutate template with the {@link InventoryMutateForm}
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* data prefilled
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*/
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String add(Model model, InventoryMutateForm form) {
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model.addAttribute("actionIsAdd", true);
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model.addAttribute("form", form);
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return "inventory-mutate";
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}
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/**
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* Adds a consumable.
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*
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* @param form a user-filled {@link ConsumableMutateForm}
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* @param errors an {@link Errors} object including validation errors
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* @param model an instance of {@link Model}
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* @return a redirect on success, otherwise the filled form with all errors
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* highlighted
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*/
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@PostMapping(path = "/inventory/add", params = "type=Consumable")
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String addConsumable(@Valid @ModelAttribute("form") ConsumableMutateForm form, Errors result, Model model) {
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return add(form, result, model);
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}
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/**
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* Adds a rentable.
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*
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* @param form a user-filled {@link RentableMutateForm}
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* @param errors an {@link Errors} object including validation errors
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* @param model an instance of {@link Model}
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* @return a redirect on success, otherwise the filled form with all errors
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* highlighted
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*/
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@PostMapping(path = "/inventory/add", params = "type=Rentable")
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String addRentable(@Valid @ModelAttribute("form") RentableMutateForm form, Errors result, Model model) {
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return add(form, result, model);
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}
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/**
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* Adds an inventory product.
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*
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* @param form a user-filled {@link InventoryMutateForm}
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* @param errors an {@link Errors} object including validation errors
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* @param model an instance of {@link Model}
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* @return a redirect on success, otherwise the filled form with all errors
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* highlighted
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*/
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String add(@Valid InventoryMutateForm form, Errors result, Model model) {
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if (result.hasErrors()) {
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return add(model, form);
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}
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inventory.save(new UniqueInventoryItem(cateringCatalog.save(form.toProduct()), form.getQuantity()));
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return "redirect:/inventory";
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}
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/**
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* Deletes an inventory product.
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*
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* @param pid the {@link Product} to delete
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* @return a redirect to the inventory overview
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*/
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@GetMapping("/inventory/delete/{pid}")
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String delete(@PathVariable Product pid) {
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UniqueInventoryItem item = inventory.findByProduct(pid).get();
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inventory.delete(item);
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cateringCatalog.delete(pid);
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return "redirect:/inventory";
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}
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}
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