From e3930d8a5bc08557518d10a0bc679d4279b6649f Mon Sep 17 00:00:00 2001
From: Alex Gravely <tcbskater@hotmail.com>
Date: Thu, 29 Mar 2018 18:10:25 -0400
Subject: [PATCH] Add SocketUser.MutualGuilds + various ext. methods.

---
 .../Extensions/CommandServiceExtensions.cs    | 27 +++++++++++++++++++
 .../Extensions/EmbedBuilderExtensions.cs      | 12 +++++++++
 .../Entities/Users/SocketUser.cs              |  6 ++++-
 3 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 src/Discord.Net.Commands/Extensions/CommandServiceExtensions.cs

diff --git a/src/Discord.Net.Commands/Extensions/CommandServiceExtensions.cs b/src/Discord.Net.Commands/Extensions/CommandServiceExtensions.cs
new file mode 100644
index 000000000..014dc14cd
--- /dev/null
+++ b/src/Discord.Net.Commands/Extensions/CommandServiceExtensions.cs
@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Discord.Commands
+{
+    public static class CommandServiceExtensions
+    {
+        public static async Task<IReadOnlyCollection<CommandInfo>> GetExecutableCommandsAsync(this IEnumerable<CommandInfo> commands, ICommandContext context, IServiceProvider provider)
+        {
+            var executableCommands = new List<CommandInfo>();
+
+            foreach (var command in commands)
+            {
+                var result = await command.CheckPreconditionsAsync(context, provider).ConfigureAwait(false);
+                if (result.IsSuccess)
+                    executableCommands.Add(command);
+            }
+
+            return executableCommands;
+        }
+        public static Task<IReadOnlyCollection<CommandInfo>> GetExecutableCommandsAsync(this CommandService commandService, ICommandContext context, IServiceProvider provider)
+            => GetExecutableCommandsAsync(commandService.Commands, context, provider);
+        public static Task<IReadOnlyCollection<CommandInfo>> GetExecutableCommandAsync(this ModuleInfo module, ICommandContext context, IServiceProvider provider)
+            => GetExecutableCommandsAsync(module.Commands, context, provider);
+    }
+}
diff --git a/src/Discord.Net.Core/Extensions/EmbedBuilderExtensions.cs b/src/Discord.Net.Core/Extensions/EmbedBuilderExtensions.cs
index 2eb4ed473..3e3c8ccaa 100644
--- a/src/Discord.Net.Core/Extensions/EmbedBuilderExtensions.cs
+++ b/src/Discord.Net.Core/Extensions/EmbedBuilderExtensions.cs
@@ -1,4 +1,6 @@
 using System;
+using System.Collections.Generic;
+using System.Linq;
 
 namespace Discord
 {
@@ -54,5 +56,15 @@ namespace Discord
 
             return builder;
         }
+
+        public static EmbedBuilder WithFields(this EmbedBuilder builder, IEnumerable<EmbedFieldBuilder> fields)
+        {
+            foreach (var field in fields)
+                builder.AddField(field);
+
+            return builder;
+        }
+        public static EmbedBuilder WithFields(this EmbedBuilder builder, params EmbedFieldBuilder[] fields)
+            => WithFields(builder, fields.AsEnumerable());
     }
 }
diff --git a/src/Discord.Net.WebSocket/Entities/Users/SocketUser.cs b/src/Discord.Net.WebSocket/Entities/Users/SocketUser.cs
index 58d5c62a1..a42ac3b85 100644
--- a/src/Discord.Net.WebSocket/Entities/Users/SocketUser.cs
+++ b/src/Discord.Net.WebSocket/Entities/Users/SocketUser.cs
@@ -1,5 +1,7 @@
-using Discord.Rest;
+using Discord.Rest;
 using System;
+using System.Collections.Generic;
+using System.Linq;
 using System.Threading.Tasks;
 using Model = Discord.API.User;
 
@@ -20,6 +22,8 @@ namespace Discord.WebSocket
         public string Mention => MentionUtils.MentionUser(Id);
         public IActivity Activity => Presence.Activity;
         public UserStatus Status => Presence.Status;
+        public IEnumerable<SocketGuild> MutualGuilds
+            => Discord.Guilds.Where(g => g.Users.Any(u => u.Id == Id));
 
         internal SocketUser(DiscordSocketClient discord, ulong id)
             : base(discord, id)