Update application

src/Discord.Net.Core/Entities/ApplicationFlags.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Discord
+{
+    /// <summary>
+    ///     Represents public flags for an application.
+    /// </summary>
+    public enum ApplicationFlags
+    {
+        GatewayPresence = 1 << 12,
+        GatewayPresenceLimited = 1 << 13,
+        GatewayGuildMembers = 1 << 14,
+        GatewayGuildMembersLimited = 1 << 15,
+        VerificationPendingGuildLimit = 1 << 16,
+        Embedded = 1 << 17,
+        GatewayMessageContent = 1 << 18,
+        GatewayMessageContentLimited =  1 << 19
+    }
+}

src/Discord.Net.Core/Entities/ApplicationInstallParams.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Discord
+{
+    /// <summary>
+    ///     Represents install parameters for an application.
+    /// </summary>
+    public class ApplicationInstallParams
+    {
+        /// <summary>
+        ///     Gets the scopes to install this application.
+        /// </summary>
+        public IReadOnlyCollection<string> Scopes { get; }
+
+        /// <summary>
+        ///     Gets the default permissions to install this application
+        /// </summary>
+        public GuildPermission? Permission { get; }
+
+        internal ApplicationInstallParams(string[] scopes, GuildPermission? permission)
+        {
+            Scopes = scopes.ToImmutableArray();
+            Permission = permission;
+        }
+    }
+}

src/Discord.Net.Core/Entities/IApplication.cs

@@ -1,3 +1,5 @@
+using System.Collections.Generic;
+
 namespace Discord
 {
     /// <summary>
@@ -16,8 +18,16 @@ namespace Discord
         /// <summary>
         ///     Gets the RPC origins of the application.
         /// </summary>
-        string[] RPCOrigins { get; }
-        ulong Flags { get; }
+        IReadOnlyCollection<string> RPCOrigins { get; }
+        ApplicationFlags Flags { get; }
+        /// <summary>
+        ///     Gets a collection of install parameters for this application.
+        /// </summary>
+        ApplicationInstallParams InstallParams { get; }
+        /// <summary>
+        ///     Gets a collection of tags related to the application.
+        /// </summary>
+        IReadOnlyCollection<string> Tags { get; }
         /// <summary>
         ///     Gets the icon URL of the application.
         /// </summary>

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

@@ -7,7 +7,7 @@ namespace Discord.API
         [JsonProperty("description")]
         public string Description { get; set; }
         [JsonProperty("rpc_origins")]
-        public string[] RPCOrigins { get; set; }
+        public Optional<string[]> RPCOrigins { get; set; }
         [JsonProperty("name")]
         public string Name { get; set; }
         [JsonProperty("id")]
@@ -18,12 +18,16 @@ namespace Discord.API
         public bool IsBotPublic { get; set; }
         [JsonProperty("bot_require_code_grant")]
         public bool BotRequiresCodeGrant { get; set; }
+        [JsonProperty("install_params")]
+        public Optional<InstallParams> InstallParams { get; set; }
+
         [JsonProperty("team")]
         public Team Team { get; set; }
 
         [JsonProperty("flags"), Int53]
-        public Optional<ulong> Flags { get; set; }
+        public Optional<ApplicationFlags> Flags { get; set; }
         [JsonProperty("owner")]
         public Optional<User> Owner { get; set; }
+        public Optional<string[]> Tags { get; set; }
     }
 }

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

@@ -0,0 +1,17 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Discord.API
+{
+    internal class InstallParams
+    {
+        [JsonProperty("scopes")]
+        public string[] Scopes { get; set; }
+        [JsonProperty("permissions")]
+        public ulong Permission { get; set; }
+    }
+}

src/Discord.Net.Rest/Entities/RestApplication.cs

@@ -1,4 +1,6 @@
 using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Threading.Tasks;
 using Model = Discord.API.Application;
@@ -18,9 +20,9 @@ namespace Discord.Rest
         /// <inheritdoc />
         public string Description { get; private set; }
         /// <inheritdoc />
-        public string[] RPCOrigins { get; private set; }
+        public IReadOnlyCollection<string> RPCOrigins { get; private set; }
         /// <inheritdoc />
-        public ulong Flags { get; private set; }
+        public ApplicationFlags Flags { get; private set; }
         /// <inheritdoc />
         public bool IsBotPublic { get; private set; }
         /// <inheritdoc />
@@ -36,6 +38,10 @@ namespace Discord.Rest
         /// <inheritdoc />
         public string IconUrl => CDN.GetApplicationIconUrl(Id, _iconId);
 
+        public ApplicationInstallParams InstallParams { get; private set; }
+
+        public IReadOnlyCollection<string> Tags { get; private set; }
+
         internal RestApplication(BaseDiscordClient discord, ulong id)
             : base(discord, id)
         {
@@ -49,14 +55,17 @@ namespace Discord.Rest
         internal void Update(Model model)
         {            
             Description = model.Description;
-            RPCOrigins = model.RPCOrigins;
+            RPCOrigins = model.RPCOrigins.IsSpecified ? model.RPCOrigins.Value.ToImmutableArray() : ImmutableArray<string>.Empty;
             Name = model.Name;
             _iconId = model.Icon;
             IsBotPublic = model.IsBotPublic;
             BotRequiresCodeGrant = model.BotRequiresCodeGrant;
+            Tags = model.Tags.GetValueOrDefault(null)?.ToImmutableArray() ?? ImmutableArray<string>.Empty;
+            var installParams = model.InstallParams.GetValueOrDefault(null);
+            InstallParams = new ApplicationInstallParams(installParams?.Scopes ?? new string[0], (GuildPermission?)installParams?.Permission ?? null);
 
             if (model.Flags.IsSpecified)
-                Flags = model.Flags.Value; //TODO: Do we still need this?
+                Flags = model.Flags.Value;
             if (model.Owner.IsSpecified)
                 Owner = RestUser.Create(Discord, model.Owner.Value);
             if (model.Team != null)