Lucas Holter

settings.gradle

@@ -1 +1,8 @@
+pluginManagement {
+    repositories {
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
 rootProject.name = 'jave.api.mvc.in.memory'

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

@@ -0,0 +1,11 @@
+package com.booleanuk.api.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/product/controllers/ProductController.java

@@ -0,0 +1,83 @@
+package com.booleanuk.api.product.controllers;
+
+import com.booleanuk.api.product.models.Product;
+import com.booleanuk.api.product.repositories.ProductRepository;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@RestController
+@RequestMapping("products")
+public class ProductController {
+    private ProductRepository productRepository;
+
+    public ProductController() {
+        this.productRepository = new ProductRepository(new ArrayList<>());
+    }
+
+    @GetMapping
+    public List<Product> getAll(@RequestParam(defaultValue="") String category){
+        if(!category.isEmpty()){
+            List<Product> filteredProd = this.productRepository.getAllByCategory(category);
+            if(filteredProd.isEmpty()){
+                throw new ResponseStatusException(HttpStatus.NOT_FOUND, "No products with that category found");
+            }
+            return filteredProd;
+        }
+
+        List<Product> allProds = this.productRepository.getAll();
+        if(allProds.isEmpty()){
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "No products found");
+        }
+        return allProds;
+    }
+
+    @GetMapping("{id}")
+    public Product getById(@PathVariable int id){
+        Product prod = this.productRepository.getById(id);
+        nullCheck(prod, HttpStatus.NOT_FOUND, "Product not found.");
+        return prod;
+    }
+
+    @PostMapping
+    @ResponseStatus(HttpStatus.CREATED)
+    public Product addProduct(@RequestBody Product product){
+        if(productRepository.checkNameConflict(product)){
+            throw new ResponseStatusException(HttpStatus.CONFLICT, "Product with provided name already exists");
+        }
+        return this.productRepository.add(product);
+    }
+
+    @PutMapping("{id}")
+    public Product putProduct(@RequestBody Product product, @PathVariable int id){
+
+        if(productRepository.checkNameConflict(product)){
+            throw new ResponseStatusException(HttpStatus.CONFLICT, "Product with provided name already exists");
+        }
+
+        Product foundProd = this.productRepository.getById(id);
+        nullCheck(foundProd, HttpStatus.NOT_FOUND, "Product not found.");
+        foundProd.setName(product.getName());
+        foundProd.setCategory(product.getCategory());
+        foundProd.setPrice(product.getPrice());
+
+        return foundProd;
+    }
+
+    @DeleteMapping("{id}")
+    public Product deleteProduct(@PathVariable int id){
+        Product removed = this.productRepository.removeProduct(id);
+        nullCheck(removed, HttpStatus.NOT_FOUND, "Product not found.");
+        return removed;
+    }
+
+    private void nullCheck(Product product, HttpStatus status, String message){
+        if(product == null){
+            throw new ResponseStatusException(status, message);
+        }
+    }
+
+}

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

@@ -0,0 +1,45 @@
+package com.booleanuk.api.product.models;
+
+public class Product {
+    private static int nextId;
+    private String name;
+    private String category;
+    private String price;
+    private int id;
+
+    public Product(String name, String category, String price) {
+        this.name = name;
+        this.category = category;
+        this.price = price;
+        this.id = nextId;
+        nextId++;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+
+    public String getPrice() {
+        return price;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void setCategory(String category) {
+        this.category = category;
+    }
+
+    public void setPrice(String price) {
+        this.price = price;
+    }
+}

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

@@ -0,0 +1,58 @@
+package com.booleanuk.api.product.repositories;
+
+import com.booleanuk.api.product.models.Product;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ProductRepository {
+    private List<Product> products;
+
+    public ProductRepository(List<Product> products) {
+        this.products = products;
+    }
+
+    public List<Product> getAll(){
+        return this.products;
+    }
+
+    public boolean checkNameConflict(Product product){
+        for(Product curr : this.products){
+            if(curr.getName().equals(product.getName())){
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public Product add(Product product){ //Void for now, would return db return if connected to db
+        this.products.add(product);
+        return product;
+    }
+
+    public Product getById(int id){
+        for(Product product : this.products){
+            if(product.getId() == id){
+                return product;
+            }
+        }
+        return null;
+    }
+
+    public Product removeProduct(int id){
+        Product removeProd = this.getById(id);
+        this.products.remove(removeProd);
+        return removeProd; //Return null if not found
+    }
+
+    public List<Product> getAllByCategory(String cat){
+        List<Product> found = new ArrayList<>();
+        for(Product curr : this.products){
+            if(cat.equals(curr.getCategory())){
+                found.add(curr);
+            }
+        }
+        return found;
+
+    }
+}