allow pk;system proxy to take a server ID

So people can disable proxying in a server without outing themselves :)

PluralKit.Bot/CommandSystem/ContextEntityArgumentsExt.cs

@@ -1,4 +1,5 @@
-using System.Threading.Tasks;
+using System;
+using System.Threading.Tasks;
 
 using Myriad.Extensions;
 using Myriad.Types;
@@ -168,5 +169,22 @@ namespace PluralKit.Bot
             ctx.PopArgument();
             return channel;
         }
+
+        public static Guild MatchGuild(this Context ctx)
+        {
+            try
+            {
+                var id = ulong.Parse(ctx.PeekArgument());
+                ctx.Cache.TryGetGuild(id, out var guild);
+                if (guild != null)
+                    ctx.PopArgument();
+
+                return guild;
+            }
+            catch (FormatException)
+            {
+                return null;
+            }
+        }
     }
 }

PluralKit.Bot/Commands/CommandTree.cs

@@ -18,7 +18,7 @@ namespace PluralKit.Bot
         public static Command SystemAvatar = new Command("system icon", "system icon [url|@mention]", "Changes your system's icon");
         public static Command SystemDelete = new Command("system delete", "system delete", "Deletes your system");
         public static Command SystemTimezone = new Command("system timezone", "system timezone [timezone]", "Changes your system's time zone");
-        public static Command SystemProxy = new Command("system proxy", "system proxy [on|off]", "Enables or disables message proxying in a specific server");
+        public static Command SystemProxy = new Command("system proxy", "system proxy [server id] [on|off]", "Enables or disables message proxying in a specific server");
         public static Command SystemList = new Command("system list", "system [system] list [full]", "Lists a system's members");
         public static Command SystemFind = new Command("system find", "system [system] find [full] <search term>", "Searches a system's members given a search term");
         public static Command SystemFronter = new Command("system fronter", "system [system] fronter", "Shows a system's fronter(s)");

PluralKit.Bot/Commands/SystemEdit.cs

@@ -4,6 +4,7 @@ using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 
 using Myriad.Builders;
+using Myriad.Types;
 
 using NodaTime;
 using NodaTime.Text;
@@ -232,8 +233,18 @@ namespace PluralKit.Bot
         
         public async Task SystemProxy(Context ctx)
         {
-            ctx.CheckSystem().CheckGuildContext();
-            var gs = await _db.Execute(c => _repo.GetSystemGuild(c, ctx.Guild.Id, ctx.System.Id));
+            ctx.CheckSystem();
+
+            var guild = ctx.MatchGuild() ?? ctx.Guild ??
+                throw new PKError("You must run this command in a server or pass a server ID.");
+
+            var gs = await _db.Execute(c => _repo.GetSystemGuild(c, guild.Id, ctx.System.Id));
+
+            string serverText;
+            if (guild.Id == ctx.Guild?.Id)
+                serverText = $"this server ({guild.Name.EscapeMarkdown()})";
+            else
+                serverText = $"the server {guild.Name.EscapeMarkdown()}";
 
             bool newValue;
             if (ctx.Match("on", "enabled", "true", "yes")) newValue = true;
@@ -242,19 +253,19 @@ namespace PluralKit.Bot
             else
             {
                 if (gs.ProxyEnabled)
-                    await ctx.Reply("Proxying in this server is currently **enabled** for your system. To disable it, type `pk;system proxy off`.");
+                    await ctx.Reply($"Proxying in {serverText} is currently **enabled** for your system. To disable it, type `pk;system proxy off`.");
                 else
-                    await ctx.Reply("Proxying in this server is currently **disabled** for your system. To enable it, type `pk;system proxy on`.");
+                    await ctx.Reply($"Proxying in {serverText} is currently **disabled** for your system. To enable it, type `pk;system proxy on`.");
                 return;
             }
 
             var patch = new SystemGuildPatch {ProxyEnabled = newValue};
-            await _db.Execute(conn => _repo.UpsertSystemGuild(conn, ctx.System.Id, ctx.Guild.Id, patch));
+            await _db.Execute(conn => _repo.UpsertSystemGuild(conn, ctx.System.Id, guild.Id, patch));
 
             if (newValue)
-                await ctx.Reply($"Message proxying in this server ({ctx.Guild.Name.EscapeMarkdown()}) is now **enabled** for your system.");
+                await ctx.Reply($"Message proxying in {serverText} is now **enabled** for your system.");
             else
-                await ctx.Reply($"Message proxying in this server ({ctx.Guild.Name.EscapeMarkdown()}) is now **disabled** for your system.");
+                await ctx.Reply($"Message proxying in {serverText} is now **disabled** for your system.");
         }
         
          public async Task SystemTimezone(Context ctx)

docs/content/command-list.md

@@ -21,7 +21,7 @@ Words in **\<angle brackets>** or **[square brackets]** mean fill-in-the-blank.
 - `pk;system privacy <subject> <public|private>` - Changes your systems privacy settings.
 - `pk;system tag [tag]` - Changes the system tag of your system.
 - `pk;system timezone [location]` - Changes the time zone of your system.
-- `pk;system proxy [on|off]` - Toggles message proxying for a specific server. 
+- `pk;system proxy [server id] [on|off]` - Toggles message proxying for a specific server.
 - `pk;system delete` - Deletes your system.
 - `pk;system [system] fronter` - Shows the current fronter of a system.
 - `pk;system [system] fronthistory` - Shows the last 10 fronters of a system.