feat: implements markets API (#787)

* feat: implements markets API

* fix: use correct constructor name

SpotifyAPI.Web/Clients/Interfaces/IMarketsClient.cs

@@ -0,0 +1,19 @@
+using System.Threading.Tasks;
+
+namespace SpotifyAPI.Web
+{
+  /// <summary>
+  /// Markets Endpoints
+  /// </summary>
+  public interface IMarketsClient
+  {
+    /// <summary>
+    /// Get the list of markets where Spotify is available.
+    /// </summary>
+    /// <remarks>
+    /// https://developer.spotify.com/documentation/web-api/reference/#/operations/get-available-markets
+    /// </remarks>
+    /// <returns></returns>
+    Task<AvailableMarketsResponse> AvailableMarkets();
+  }
+}

SpotifyAPI.Web/Clients/MarketsClient.cs

@@ -0,0 +1,16 @@
+using System.Threading.Tasks;
+using SpotifyAPI.Web.Http;
+using URLs = SpotifyAPI.Web.SpotifyUrls;
+
+namespace SpotifyAPI.Web
+{
+  public class MarketsClient : APIClient, IMarketsClient
+  {
+    public MarketsClient(IAPIConnector apiConnector) : base(apiConnector) { }
+
+    public Task<AvailableMarketsResponse> AvailableMarkets()
+    {
+      return API.Get<AvailableMarketsResponse>(URLs.Markets());
+    }
+  }
+}

SpotifyAPI.Web/Clients/SpotifyClient.cs

@@ -49,6 +49,7 @@ public SpotifyClient(SpotifyClientConfig config)
       Personalization = new PersonalizationClient(_apiConnector);
       Episodes = new EpisodesClient(_apiConnector);
       Library = new LibraryClient(_apiConnector);
+      Markets = new MarketsClient(_apiConnector);
     }
 
     public IPaginator DefaultPaginator { get; }
@@ -79,6 +80,8 @@ public SpotifyClient(SpotifyClientConfig config)
 
     public ILibraryClient Library { get; }
 
+    public IMarketsClient Markets { get; }
+
     public IResponse? LastResponse { get; private set; }
 
     /// <summary>

SpotifyAPI.Web/Models/Response/AvailableMarketsResponse.cs

@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+
+namespace SpotifyAPI.Web
+{
+  public class AvailableMarketsResponse
+  {
+    public List<string> Markets { get; set; } = default!;
+  }
+}
+

SpotifyAPI.Web/SpotifyUrls.cs

@@ -129,6 +129,8 @@ public static class SpotifyUrls
 
     public static Uri LibraryEpisodesContains() => EUri($"me/episodes/contains");
 
+    public static Uri Markets() => EUri($"markets");
+
     private static Uri EUri(FormattableString path) => new(path.ToString(_provider), UriKind.Relative);
   }
 }