Jonas Finborud Nyman

src/main/java/com/booleanuk/api/bagels/product/Main.java

@@ -0,0 +1,11 @@
+package com.booleanuk.api.bagels.product;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Main {
+    public static void main(String[] args) {
+        SpringApplication.run(Main.class, args);
+    }
+}

src/main/java/com/booleanuk/api/bagels/product/Product.java

@@ -0,0 +1,49 @@
+package com.booleanuk.api.bagels.product;
+
+public class Product {
+    private static int nextId = 1;
+    private int id;
+    private String name;
+    private String category;
+    private int price;
+
+    public Product(String name, String category, int price) {
+        this.id = nextId;
+        nextId++;
+        this.name = name;
+        this.category = category;
+        this.price = price;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+
+    public void setCategory(String category) {
+        this.category = category;
+    }
+
+    public int getPrice() {
+        return price;
+    }
+
+    public void setPrice(int price) {
+        this.price = price;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+}

src/main/java/com/booleanuk/api/bagels/product/ProductController.java

@@ -0,0 +1,68 @@
+package com.booleanuk.api.bagels.product;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.util.ArrayList;
+
+@RestController
+@RequestMapping("products")
+public class ProductController {
+    private ProductRepository theProducts;
+
+    public ProductController() {
+        this.theProducts = new ProductRepository();
+    }
+
+    @GetMapping
+    @ResponseBody
+    public ArrayList<Product> getAllProducts(@RequestParam(required = false) String category) {
+        ArrayList<Product> newList = this.theProducts.getAll(category);
+        if(newList.isEmpty() && category != null) {
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "No products of the provided category were found.");
+        }
+        return newList;
+    }
+
+    @GetMapping("{id}")
+    public Product getOneProduct(@PathVariable int id) {
+        Product theProduct = this.theProducts.getOne(id);
+        if(theProduct == null) {
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Product not found.");
+        }
+        return theProduct;
+    }
+
+    @PostMapping
+    public Product createProduct(@RequestBody Product product) {
+        Product newProduct = this.theProducts.create(product);
+        if(newProduct == null) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Product with provided name already exists.");
+        }
+        return newProduct;
+    }
+
+    @PutMapping("{id}")
+    public Product updateProduct(@PathVariable int id, @RequestBody Product product) {
+
+        if(!this.theProducts.checkIfNameIsUnique(product)) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Product with provided name already exists");
+        }
+
+        Product theProduct = this.theProducts.update(id, product);
+        if(theProduct == null) {
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Product not found.");
+        }
+        return theProduct;
+    }
+
+    @DeleteMapping("{id}")
+    public Product deleteProduct(@PathVariable int id) {
+        Product theProduct = this.theProducts.delete(id);
+        if(theProduct == null) {
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND);
+        }
+        return theProduct;
+    }
+}

src/main/java/com/booleanuk/api/bagels/product/ProductRepository.java

@@ -0,0 +1,73 @@
+package com.booleanuk.api.bagels.product;
+
+import java.util.ArrayList;
+
+public class ProductRepository {
+    private ArrayList<Product> products;
+
+    public ProductRepository() {
+        this.products = new ArrayList<>();
+    }
+
+    public ArrayList<Product> getAll(String category) {
+        if(category == null) {
+            return this.products;
+        }
+        ArrayList<Product> newList = new ArrayList<>();
+        for(Product p : this.products) {
+            if(p.getCategory().equalsIgnoreCase(category)) {
+                newList.add(p);
+            }
+        }
+        return newList;
+    }
+
+    public Product getOne(int id) {
+        for(Product product : this.products) {
+            if(product.getId() == id) {
+                return product;
+            }
+        }
+        return null;
+    }
+
+    public Product create(Product product) {
+        for(Product p : this.products) {
+            if(p.getName().equalsIgnoreCase(product.getName())) {
+                return null;
+            }
+        }
+        this.products.add(product);
+        return product;
+    }
+
+    public Product update(int id, Product product) {
+
+        Product theProduct = this.getOne(id);
+        if(theProduct == null) {
+            return theProduct;
+        }
+        theProduct.setName(product.getName());
+        theProduct.setCategory(product.getCategory());
+        theProduct.setPrice(product.getPrice());
+        return theProduct;
+    }
+
+    public boolean checkIfNameIsUnique(Product product) {
+        for(Product p : this.products) {
+            if(p.getName().equalsIgnoreCase(product.getName())) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public Product delete(int id) {
+        Product theProduct = this.getOne(id);
+        if(theProduct == null) {
+            return theProduct;
+        }
+        this.products.remove(theProduct);
+        return theProduct;
+    }
+}