feature: support reading multiple activities (#1520)

src/Discord.Net.Core/Entities/Users/IPresence.cs

@@ -19,5 +19,9 @@ namespace Discord
         ///     Gets the set of clients where this user is currently active.
         /// </summary>
         IImmutableSet<ClientType> ActiveClients { get; }
+        /// <summary>
+        ///     Gets the list of activities that this user currently has available.
+        /// </summary>
+        IImmutableList<IActivity> Activities { get; }
     }
 }

src/Discord.Net.Rest/API/Common/Presence.cs

@@ -1,5 +1,6 @@
 #pragma warning disable CS1591
 using Newtonsoft.Json;
+using System;
 using System.Collections.Generic;
 
 namespace Discord.API
@@ -26,5 +27,9 @@ namespace Discord.API
         //   "client_status": { "desktop": "dnd", "mobile": "dnd" }
         [JsonProperty("client_status")]
         public Optional<Dictionary<string, string>> ClientStatus { get; set; }
+        [JsonProperty("activities")]
+        public List<Game> Activities { get; set; }
+        [JsonProperty("premium_since")]
+        public Optional<DateTimeOffset?> PremiumSince { get; set; }
     }
 }

src/Discord.Net.Rest/Entities/Users/RestUser.cs

@@ -35,6 +35,8 @@ namespace Discord.Rest
         /// <inheritdoc />
         public virtual IImmutableSet<ClientType> ActiveClients => ImmutableHashSet<ClientType>.Empty;
         /// <inheritdoc />
+        public virtual IImmutableList<IActivity> Activities => ImmutableList<IActivity>.Empty;
+        /// <inheritdoc />
         public virtual bool IsWebhook => false;
 
         internal RestUser(BaseDiscordClient discord, ulong id)

src/Discord.Net.WebSocket/DiscordSocketClient.cs

@@ -342,7 +342,7 @@ namespace Discord.WebSocket
             {
                 var user = SocketGlobalUser.Create(this, state, model);
                 user.GlobalUser.AddRef();
-                user.Presence = new SocketPresence(UserStatus.Online, null, null);
+                user.Presence = new SocketPresence(UserStatus.Online, null, null, null);
                 return user;
             });
         }
@@ -450,7 +450,7 @@ namespace Discord.WebSocket
                 return;
             var status = Status;
             var statusSince = _statusSince;
-            CurrentUser.Presence = new SocketPresence(status, Activity, null);
+            CurrentUser.Presence = new SocketPresence(status, Activity, null, null);
 
             var gameModel = new GameModel();
             // Discord only accepts rich presence over RPC, don't even bother building a payload

src/Discord.Net.WebSocket/Entities/Users/SocketGuildUser.cs

@@ -154,6 +154,8 @@ namespace Discord.WebSocket
                 Nickname = model.Nick.Value;
             if (model.Roles.IsSpecified)
                 UpdateRoles(model.Roles.Value);
+            if (model.PremiumSince.IsSpecified)
+                _premiumSinceTicks = model.PremiumSince.Value?.UtcTicks;
         }
         private void UpdateRoles(ulong[] roleIds)
         {

src/Discord.Net.WebSocket/Entities/Users/SocketPresence.cs

@@ -18,16 +18,20 @@ namespace Discord.WebSocket
         public IActivity Activity { get; }
         /// <inheritdoc />
         public IImmutableSet<ClientType> ActiveClients { get; }
-        internal SocketPresence(UserStatus status, IActivity activity, IImmutableSet<ClientType> activeClients)
+        /// <inheritdoc />
+        public IImmutableList<IActivity> Activities { get; }
+        internal SocketPresence(UserStatus status, IActivity activity, IImmutableSet<ClientType> activeClients, IImmutableList<IActivity> activities)
         {
             Status = status;
-            Activity= activity;
-            ActiveClients = activeClients;
+            Activity = activity;
+            ActiveClients = activeClients ?? ImmutableHashSet<ClientType>.Empty;
+            Activities = activities ?? ImmutableList<IActivity>.Empty;
         }
         internal static SocketPresence Create(Model model)
         {
             var clients = ConvertClientTypesDict(model.ClientStatus.GetValueOrDefault());
-            return new SocketPresence(model.Status, model.Game?.ToEntity(), clients);
+            var activities = ConvertActivitiesList(model.Activities);
+            return new SocketPresence(model.Status, model.Game?.ToEntity(), clients, activities);
         }
         /// <summary>
         ///     Creates a new <see cref="IReadOnlyCollection{T}"/> containing all of the client types
@@ -53,6 +57,25 @@ namespace Discord.WebSocket
             }
             return set.ToImmutableHashSet();
         }
+        /// <summary>
+        ///     Creates a new <see cref="IReadOnlyCollection{T}"/> containing all the activities
+        ///     that a user has from the data supplied in the Presence update frame.
+        /// </summary>
+        /// <param name="activities">
+        ///     A list of <see cref="API.Game"/>.
+        /// </param>
+        /// <returns>
+        ///     A list of all <see cref="IActivity"/> that this user currently has available.
+        /// </returns>
+        private static IImmutableList<IActivity> ConvertActivitiesList(IList<API.Game> activities)
+        {
+            if (activities == null || activities.Count == 0)
+                return ImmutableList<IActivity>.Empty;
+            var list = new List<IActivity>();
+            foreach (var activity in activities)
+                list.Add(activity.ToEntity());
+            return list.ToImmutableList();
+        }
 
         /// <summary>
         ///     Gets the status of the user.

src/Discord.Net.WebSocket/Entities/Users/SocketUnknownUser.cs

@@ -25,7 +25,7 @@ namespace Discord.WebSocket
         /// <inheritdoc />
         public override bool IsWebhook => false;
         /// <inheritdoc />
-        internal override SocketPresence Presence { get { return new SocketPresence(UserStatus.Offline, null, null); } set { } }
+        internal override SocketPresence Presence { get { return new SocketPresence(UserStatus.Offline, null, null, null); } set { } }
         /// <inheritdoc />
         /// <exception cref="NotSupportedException">This field is not supported for an unknown user.</exception>
         internal override SocketGlobalUser GlobalUser =>

src/Discord.Net.WebSocket/Entities/Users/SocketUser.cs

@@ -41,6 +41,8 @@ namespace Discord.WebSocket
         public UserStatus Status => Presence.Status;
         /// <inheritdoc />
         public IImmutableSet<ClientType> ActiveClients => Presence.ActiveClients ?? ImmutableHashSet<ClientType>.Empty;
+        /// <inheritdoc />
+        public IImmutableList<IActivity> Activities => Presence.Activities ?? ImmutableList<IActivity>.Empty;
         /// <summary>
         ///     Gets mutual guilds shared with this user.
         /// </summary>

src/Discord.Net.WebSocket/Entities/Users/SocketWebhookUser.cs

@@ -30,7 +30,7 @@ namespace Discord.WebSocket
         /// <inheritdoc />
         public override bool IsWebhook => true;
         /// <inheritdoc />
-        internal override SocketPresence Presence { get { return new SocketPresence(UserStatus.Offline, null, null); } set { } }
+        internal override SocketPresence Presence { get { return new SocketPresence(UserStatus.Offline, null, null, null); } set { } }
         internal override SocketGlobalUser GlobalUser => 
             throw new NotSupportedException();