Moueed Ali

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

@@ -0,0 +1,12 @@
+package com.booleanuk.api.bagels;
+
+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/controller/ProductController.java

@@ -0,0 +1,84 @@
+package com.booleanuk.api.bagels.controller;
+
+import com.booleanuk.api.bagels.models.Product;
+import com.booleanuk.api.bagels.repositories.ProductRepository;
+import org.apache.coyote.Response;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.util.List;
+import java.util.Objects;
+
+@RestController
+@RequestMapping("products")
+public class ProductController {
+    private ProductRepository productRepository;
+
+    public ProductController() {
+        productRepository = new ProductRepository();
+    }
+
+    @GetMapping
+    public List<Product> getAll() {
+        List<Product> products =  this.productRepository.findAll();
+
+        if (products.isEmpty()) {
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Not products were found");
+        }
+
+        return products;
+    }
+
+    @GetMapping("{id}")
+    public Product getOne(@PathVariable int id) {
+        Product product =  this.productRepository.getOne(id);
+
+        if (product == null) {
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Product is not found");
+        }
+
+        return product;
+    }
+
+    @PostMapping
+    @ResponseStatus(HttpStatus.CREATED)
+    public Product create(@RequestBody Product product) {
+
+        if (productRepository.checkName(product.getName())) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Product not created");
+        }
+
+        this.productRepository.addProduct(product);
+        return product;
+    }
+
+    @PutMapping("/{id}")
+    @ResponseStatus(HttpStatus.CREATED)
+    public Product update(@PathVariable(name = "id") int id, @RequestBody Product product) {
+
+        if (productRepository.checkName(product.getName())) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Product exists already");
+        }
+        else if (id < this.productRepository.size()) {
+            this.productRepository.findAll().get(id).setId(id);
+            this.productRepository.findAll().get(id).setName(product.getName());
+            this.productRepository.findAll().get(id).setCategory(product.getCategory());
+            this.productRepository.findAll().get(id).setPrice(product.getPrice());
+        }
+        else {
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Product does not exist");
+        }
+        return null;
+    }
+
+    @DeleteMapping("/{id}")
+    public Product delete(@PathVariable (name = "id") int id) {
+        if (id < this.productRepository.size()) {
+            return this.productRepository.findAll().remove(id);
+        }
+        else {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Not found");
+        }
+    }
+}

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

@@ -0,0 +1,47 @@
+package com.booleanuk.api.bagels.models;
+
+public class Product {
+    private int id;
+    private String name;
+    private String category;
+    private int price;
+
+    public Product(int id, String name, String category, int price) {
+        this.id = id;
+        this.name = name;
+        this.category = category;
+        this.price = price;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getPrice() {
+        return price;
+    }
+
+    public void setPrice(int price) {
+        this.price = price;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+
+    public void setCategory(String category) {
+        this.category = category;
+    }
+}

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

@@ -0,0 +1,49 @@
+package com.booleanuk.api.bagels.repositories;
+
+import com.booleanuk.api.bagels.models.Product;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+public class ProductRepository {
+    private List<Product> products;
+    private int idCounter = 0;
+
+    public ProductRepository() {
+        products = new ArrayList<>();
+
+        products.add(new Product(this.idCounter++, "Cheese", "Food", 10));
+        products.add(new Product(this.idCounter++,  "Milk", "Food", 5));
+        products.add(new Product(this.idCounter++,"Jacket", "Clothing", 100));
+    }
+
+    public List<Product> findAll() {return this.products;}
+
+    public Product getOne(int id) {
+        for (Product p : products) {
+            if (p.getId() == id) {
+                return p;
+            }
+        }
+
+        return null;
+    }
+
+    public boolean addProduct(Product p) {
+        return products.add(p);
+    }
+
+    public int size() {
+        return products.size();
+    }
+
+    public boolean checkName(String name) {
+        for (Product p: products) {
+            if (Objects.equals(p.getName(), name)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}