Create API request and reponse model.

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

@@ -0,0 +1,89 @@
+using Newtonsoft.Json;
+using osu.Game.Rulesets.Scoring;
+using Humanizer;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using osu.Game.Rulesets;
+using osu.Game.Overlays.Profile.Sections.Recent;
+
+namespace osu.Game.Online.API.Requests
+{
+    public class GetUserRecentActivitiesRequest : APIRequest<List<RecentActivity>>
+    {
+    }
+
+    public class RecentActivity
+    {
+        [JsonProperty("id")]
+        public int ID;
+
+        [JsonProperty("created_at")]
+        public DateTimeOffset CreatedAt;
+
+        [JsonProperty]
+        private string type
+        {
+            set => Type = (RecentActivityType)Enum.Parse(typeof(RecentActivityType), value.Pascalize());
+        }
+
+        public RecentActivityType Type;
+
+        [JsonProperty]
+        private string scoreRank
+        {
+            set => ScoreRank = (ScoreRank)Enum.Parse(typeof(ScoreRank), value);
+        }
+
+        public ScoreRank ScoreRank;
+
+        [JsonProperty("rank")]
+        public int Rank;
+
+        [JsonProperty("mode")]
+        public string Mode;
+
+        [JsonProperty("beatmap")]
+        public RecentActivityBeatmap Beatmap;
+
+        [JsonProperty("user")]
+        public RecentActivityUser User;
+
+        public class RecentActivityBeatmap
+        {
+            [JsonProperty("title")]
+            public string Title;
+
+            [JsonProperty("url")]
+            public string Url;
+        }
+
+        public class RecentActivityUser
+        {
+            [JsonProperty("username")]
+            public string Username;
+
+            [JsonProperty("url")]
+            public string Url;
+        }
+    }
+
+    public enum RecentActivityType
+    {
+        Achievement,
+        BeatmapPlaycount,
+        BeatmapsetApprove,
+        BeatmapsetDelete,
+        BeatmapsetRevive,
+        BeatmapsetUpdate,
+        Medal,
+        Rank,
+        RankLost,
+        UserSupportAgain,
+        UserSupportFirst,
+        UserSupportGift,
+        UsernameChange,
+    }
+}