Notes

@Service
public class ProductService {

@Autowired
private ProductRepository productRepository;

public Object postProduct(@RequestBody Product product){
if(productRepository.existsBySku(product.getSku())) {
return productRepository.status(HttpStatus.BAD_REQUEST).build();
} try{
Product newProduct=new Product(product.getName(), product.getDescription(),product.getVendor(),
product.getPrice(), product.getStock(), product.getCurrency(),product.getImage_url(),product.getSku());

productRepository.save(newProduct);
return ResponseEntity.status(HttpStatus.CREATED).build();
}
catch(Exception e){
return ResponseEntity.status(HttpStatus.BAD_REQUEST).build();
}
}

public Object getproduct(){
List<Product> products = productRepository.findAll();
if(products.isEmpty()){
return ResponseEntity.status(HttpStatus.BAD_REQUEST).build();
}
else{
return ResponseEntity.ok(products);
}
}


public ResponseEntity<Object> getSimilarBVendor(@RequestParam String value){
List<Products> similarProducts = productRepository.findByVendor(value);
if(similarProducts.isEmpty()){
return ResponseEntity.status(HttpStatus.BAD_REQUEST).build();
}
else{
return ResponseEntity.ok(similarProducts);
}
}

public ResponseEntity<Object> updateProduct(@PathVariable int id, @RequestBody Product product){
Optional<Product> optionalProduct = productRepository.findById(id);
if(!optionalProduct.isPresent()){
return ResponseEntity.status(HttpStatus.BAD_REQUEST).build();
}
try{
Product existingProduct = optionalProduct.get();
existingProduct.setPrice(product.getPrice());
existingProduct.setStock(product.getStock());
Product savedProduct = productRepository.save(existingProduct);
return ResponseEntity.status(HttpStatus.OK).body(savedProduct);
}
catch(Exception e){
return ResponseEntity.status(HttpStatus.BAD_REQUEST).build();
}
}

public ResponseEntity<Object> deleteProductById(@Pathvariable int id){
if(!productRepository.existsById(id)){
return ResponseEntity.status(HttpStatus.BAD_REQUEST).build();
}
try{
productRepository.deleteById(id);
return ResponseEntity.status(HttpStatus.OK).build();
}
catch(Exception e){
return ResponseEntity.status(HttpStatus.BAD_REQUEST).build();
}
}
}
}

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@Controller
public class ProductController{

@Autowired
private ProductService productService;

@PostMapping("/product/add")
private Object postObject(@RequestBody Product product){
return productService.postproduct(product);
}

@GetMapping("/product/get")
private Object getproduct(){
return productService.getProduct();
}

@PutMapping("/product/{id}")
private ResponseEntity<Object> updateProduct(@PathVariable int id, @RequestBodyProduct product){
return productService.updateProduct(id,product);
}

@DeleteMapping("/product/{id}")
private ResponseEntity<Object> deleteProductById(@PathVariable int id){
return productService.deleteById(id);
}

@GetMapping("/product/vendor")
public ResponseEntity<Object> getSimilarVendor(@RequestParam String value){
return productService.getSimilarVendor(value);
}
}