Port some things, still does not compile

PluralKit.Bot/Utils/DiscordUtils.cs

@@ -1,31 +1,76 @@
-using Discord;
-using Discord.WebSocket;
+using System;
+using System.Threading.Tasks;
+
+using DSharpPlus;
+using DSharpPlus.Entities;
+
+using NodaTime;
 
 namespace PluralKit.Bot
 {
     public static class DiscordUtils
     {
-        public static string NameAndMention(this IUser user) {
+        public static string NameAndMention(this DiscordUser user) {
             return $"{user.Username}#{user.Discriminator} ({user.Mention})";
         }
-        
-        public static ChannelPermissions PermissionsIn(this IChannel channel)
+
+        public static async Task<Permissions> PermissionsIn(this DiscordChannel channel, DiscordUser user)
         {
-            switch (channel)
+            if (channel.Guild != null)
             {
-                case IDMChannel _:
-                    return ChannelPermissions.DM;
-                case IGroupChannel _:
-                    return ChannelPermissions.Group;
-                case SocketGuildChannel gc:
-                    var currentUser = gc.Guild.CurrentUser;
-                    return currentUser.GetPermissions(gc);
-                default:
-                    return ChannelPermissions.None;
+                var member = await channel.Guild.GetMemberAsync(user.Id);
+                return member.PermissionsIn(channel);
             }
+            
+            if (channel.Type == ChannelType.Private)
+                return (Permissions) 0b00000_1000110_1011100110000_000000;
+
+            return Permissions.None;
         }
 
-        public static bool HasPermission(this IChannel channel, ChannelPermission permission) =>
-            PermissionsIn(channel).Has(permission);
+        public static Permissions PermissionsInSync(this DiscordChannel channel, DiscordUser user)
+        {
+            if (user is DiscordMember dm && channel.Guild != null)
+                return dm.PermissionsIn(channel);
+            
+            if (channel.Type == ChannelType.Private)
+                return (Permissions) 0b00000_1000110_1011100110000_000000;
+
+            return Permissions.None;
+        }
+
+        public static Permissions BotPermissions(this DiscordChannel channel)
+        {
+            if (channel.Guild != null)
+            {
+                var member = channel.Guild.CurrentMember;
+                return channel.PermissionsFor(member);
+            }
+
+            if (channel.Type == ChannelType.Private)
+                return (Permissions) 0b00000_1000110_1011100110000_000000;
+
+            return Permissions.None;
+        }
+
+        public static bool BotHasPermission(this DiscordChannel channel, Permissions permissionSet) =>
+            (BotPermissions(channel) & permissionSet) == permissionSet;
+
+        public static Instant SnowflakeToInstant(ulong snowflake) => 
+            Instant.FromUtc(2015, 1, 1, 0, 0, 0) + Duration.FromMilliseconds(snowflake << 22);
+
+        public static ulong InstantToSnowflake(Instant time) =>
+            (ulong) (time - Instant.FromUtc(2015, 1, 1, 0, 0, 0)).TotalMilliseconds >> 22;
+
+        public static ulong InstantToSnowflake(DateTimeOffset time) =>
+            (ulong) (time - new DateTimeOffset(2015, 1, 1, 0, 0, 0, TimeSpan.Zero)).TotalMilliseconds >> 22;
+
+        public static async Task CreateReactionsBulk(this DiscordMessage msg, string[] reactions)
+        {
+            foreach (var reaction in reactions)
+            {
+                await msg.CreateReactionAsync(DiscordEmoji.FromUnicode(reaction));
+            }
+        }
     }
 }