Connor Stokes Core and extension

build.gradle

@@ -22,6 +22,9 @@ dependencies {
 	developmentOnly 'org.springframework.boot:spring-boot-devtools'
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+	// https://mvnrepository.com/artifact/org.projectlombok/lombok
+	compileOnly 'org.projectlombok:lombok:1.18.34'
+	annotationProcessor 'org.projectlombok:lombok'
 }
 
 tasks.named('test') {

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

@@ -0,0 +1,11 @@
+package com.booleanuk.api;
+
+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/Products/Product.java

@@ -0,0 +1,17 @@
+package com.booleanuk.api.Products;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor
+@Data
+@AllArgsConstructor
+
+public class Product {
+    private int id;
+    private String name;
+    private String category;
+    private int price;
+
+}

src/main/java/com/booleanuk/api/Products/ProductController.java

@@ -0,0 +1,74 @@
+package com.booleanuk.api.Products;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("products")
+public class ProductController {
+    ProductRepository repository;
+    public ProductController(ProductRepository repository) {
+        this.repository = repository;
+    }
+
+    @GetMapping
+    @ResponseStatus(HttpStatus.OK)
+    public List<Product> getAll(@RequestParam(value = "category", required = false) String category) {
+        if (category != null) {
+            List<Product> products = this.repository.getAllByCategory(category);
+            if (products.isEmpty()) {
+                throw new ResponseStatusException(HttpStatus.NOT_FOUND, "No products of the provided category were found.");
+            }
+            return products;
+        }
+        return this.repository.getAll();
+    }
+
+
+    @GetMapping("/{id}")
+    @ResponseStatus(HttpStatus.OK)
+    public Product getById(@PathVariable("id") int id) {
+        Product product = this.repository.find(id);
+        return product;
+    }
+
+
+    @PostMapping
+    @ResponseStatus(HttpStatus.CREATED)
+    public Product create(@RequestBody Product product) {
+        return this.repository.create(product.getName(), product.getCategory(), product.getPrice());
+    }
+
+
+
+    @PutMapping("/{id}")
+    @ResponseStatus(HttpStatus.CREATED)
+    public Product putProduct(@PathVariable("id") int id,  @RequestBody Product updatedProduct ) {
+        if(this.repository.find(updatedProduct.getName()).isPresent()){
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Product with provided name already exists.");
+        }else{
+            Product product = this.repository.find(id);
+            if(product != null){
+                product.setName(updatedProduct.getName());
+                product.setCategory(updatedProduct.getCategory());
+                product.setPrice(updatedProduct.getPrice());
+                return product;
+            }else{
+                return null;
+            }
+        }
+
+    }
+
+    @DeleteMapping("/{id}")
+    @ResponseStatus(HttpStatus.OK)
+    public Product deleteProductFirstName(@PathVariable("id") int id) {
+        return this.repository.delete(id);
+    }
+
+
+
+}

src/main/java/com/booleanuk/api/Products/ProductRepository.java

@@ -0,0 +1,59 @@
+package com.booleanuk.api.Products;
+
+
+
+
+
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Repository;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+@Repository
+public class ProductRepository {
+    private int idCounter = 1;
+    private List<Product> data = new ArrayList<>();
+    public Product create(String name, String category, int price) {
+        Product product = new Product(this.idCounter++, name, category , price);
+        this.data.add(product);
+        return product;
+    }
+    public List<Product> getAll() {
+        return this.data;
+    }
+    public List<Product> getAllByCategory(String category) {
+        List<Product> productsMatching = new ArrayList<>();
+        for (int i = 0; i < data.size(); i++) {
+            if(data.get(i).getCategory().equals(category)){
+                productsMatching.add(data.get(i));
+            }
+        }
+        return productsMatching;
+    }
+
+    public Product find(int id) {
+        return this.data.stream()
+                .filter(product -> product.getId() == id)
+                .findFirst()
+                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Product not found."));
+    }
+    public Optional<Product> find(String name) {
+        return this.data.stream()
+                .filter(product -> product.getName().equals(name))
+                .findFirst();
+    }
+
+    public Product delete(int id) {
+        for (int i = 0; i < this.data.size(); i++) {
+            if(this.data.get(i).getId() == id){
+                Product deletedProduct = this.data.get(i);
+                this.data.remove(i);
+                return deletedProduct;
+            }
+        }
+        throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Product not found.");
+    }
+}