Implement GetCommentsRequest

osu.Game/Online/API/Requests/GetCommentsRequest.cs

@@ -0,0 +1,53 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.IO.Network;
+using Humanizer;
+using osu.Game.Online.API.Requests.Responses;
+
+namespace osu.Game.Online.API.Requests
+{
+    public class GetCommentsRequest : APIRequest<APIComments>
+    {
+        private readonly long id;
+        private readonly int page;
+        private readonly CommentableType type;
+        private readonly SortCommentsBy sort;
+
+        public GetCommentsRequest(CommentableType type, long id, SortCommentsBy sort = SortCommentsBy.New, int page = 1)
+        {
+            this.type = type;
+            this.sort = sort;
+            this.id = id;
+            this.page = page;
+        }
+
+        protected override WebRequest CreateWebRequest()
+        {
+            var req = base.CreateWebRequest();
+
+            req.AddParameter("commentable_type", type.ToString().Underscore().ToLowerInvariant());
+            req.AddParameter("commentable_id", id.ToString());
+            req.AddParameter("sort", sort.ToString());
+            req.AddParameter("page", page.ToString());
+
+            return req;
+        }
+
+        protected override string Target => "comments";
+    }
+
+    public enum CommentableType
+    {
+        Build,
+        Beatmapset,
+        NewsPost
+    }
+
+    public enum SortCommentsBy
+    {
+        New,
+        Old,
+        Top
+    }
+}