cs11dotnet7/vscode/PracticalApps/Northwind.BlazorWasm/Client/Data/NorthwindService.cs

using System.Net.Http.Json; // GetFromJsonAsync, ReadFromJsonAsync
using Packt.Shared; // Customer

namespace Northwind.BlazorWasm.Client.Data;

public class NorthwindService : INorthwindService
{
  private readonly HttpClient http;

  public NorthwindService(HttpClient http)
  {
    this.http = http;
  }

  public Task<List<Customer>> GetCustomersAsync()
  {
    return http.GetFromJsonAsync
      <List<Customer>>("api/customers")!;
  }

  public Task<List<Customer>> GetCustomersAsync(string country)
  {
    return http.GetFromJsonAsync
      <List<Customer>>($"api/customers/in/{country}")!;
  }

  public Task<Customer?> GetCustomerAsync(string id)
  {
    return http.GetFromJsonAsync
      <Customer>($"api/customers/{id}");
  }

  public async Task<Customer>
    CreateCustomerAsync(Customer c)
  {
    HttpResponseMessage response = await
      http.PostAsJsonAsync("api/customers", c);

    return (await response.Content
      .ReadFromJsonAsync<Customer>())!;
  }

  public async Task<Customer> UpdateCustomerAsync(Customer c)
  {
    HttpResponseMessage response = await
      http.PutAsJsonAsync("api/customers", c);

    return (await response.Content
      .ReadFromJsonAsync<Customer>())!;
  }

  public async Task DeleteCustomerAsync(string id)
  {
    HttpResponseMessage response = await
      http.DeleteAsync($"api/customers/{id}");
  }
}