cscPractical3-ProductionV2Controller

using ProductStore.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using System.Web.Http.Cors;

namespace WebAPIRestful.Controllers
{
    public class ProductV2Controller : ApiController
    {
        static readonly IProductRepository repository = new ProductRepository();


        //Version 2
       
        [HttpGet]
        [Route("api/v2/products")]
        public IEnumerable<Product> GetAllProductsFromRepository()
        {
            return repository.GetAll();

        }
        //Route constraints let you restrict how the parameters in the route template are matched. 
        //The general syntax is "{parameter:constraint}".
        //Constraints on URL parameters

        //We can even restrict the template placeholder to the type of parameter it can have. 
        //For example, we can restrict that the request will be only served if the id is greater than 2.
        //Otherwise the request will not work. For this, we will apply multiple constraints in the same request:


        //Type of the parameter id must be an integer.
        //id should be greater than 2.
        //http://localhost:9000/api2/products/1 404 error code
        [HttpGet]
        [Route("api/v2/products/{id:int:min(2)}", Name = "getProductById")]

        public Product retrieveProductfromRepository(int id)
        {
            Product item = repository.Get(id);
            if (item == null)
            {
                throw new HttpResponseException(HttpStatusCode.NotFound);
            }
            return item;
        }


        [HttpGet]
        [Route("api/v2/products", Name = "getProductByCategory")]
        //http://localhost:9000/api2/products?category=
        //http://localhost:9000/api2/products?category=Groceries

        public IEnumerable<Product> GetProductsByCategory(string category)
        {
            return repository.GetAll().Where(
                p => string.Equals(p.Category, category, StringComparison.OrdinalIgnoreCase));
        }


        //Response code: By default, the Web API framework sets the response status code to 200 (OK). 
        //But according to the HTTP/1.1 protocol, when a POST request results in the creation of a resource, the server should reply with status 201 (Created).
        //Location: When the server creates a resource, it should include the URI of the new resource in the Location header of the response.
        [HttpPost]
        [Route("api/v2/products")]
        public HttpResponseMessage PostProduct(Product item)
        {
            item = repository.Add(item);
            var response = Request.CreateResponse<Product>(HttpStatusCode.Created, item);

            // Generate a link to the new product and set the Location header in the response.

            string uri = Url.Link("getProductById", new { id = item.Id });
            response.Headers.Location = new Uri(uri);
            return response;
        }



        [HttpPut]
        [Route("api/v2/products/{id:int}")]
        public void PutProduct(int id, Product product)
        {
            product.Id = id;
            if (!repository.Update(product))
            {
                throw new HttpResponseException(HttpStatusCode.NotFound);
            }
        }

        [HttpDelete]
        [Route("api/v2/products/{id:int}")]
        public void DeleteProduct(int id)
        {
            repository.Remove(id);
        }
    }

}