Add /nicknamelock

Closes #226

Author: Erisa

Commands/InteractionCommands/NicknameLockInteraction.cs

@@ -0,0 +1,84 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Cliptok.Commands.InteractionCommands
+{
+    public class NicknameLockInteraction : ApplicationCommandModule
+    {
+        [SlashCommandGroup("nicknamelock", "Prevent a member from changing their nickname.", defaultPermission: false)]
+        [SlashRequireHomeserverPerm(ServerPermLevel.TrialModerator), SlashCommandPermissions(DiscordPermissions.ManageNicknames)]
+        public class NicknameLockSlashCommands
+        {
+            [SlashCommand("enable", "Prevent a member from changing their nickname.")]
+            public async Task NicknameLockEnableSlashCmd(InteractionContext ctx, [Option("member", "The member to nickname lock.")] DiscordUser discordUser)
+            {
+                DiscordMember member = default;
+
+                try
+                {
+                    member = await ctx.Guild.GetMemberAsync(discordUser.Id);
+                } catch (Exception e)
+                {
+                    await ctx.RespondAsync($"{Program.cfgjson.Emoji.Error} Failed to find {discordUser.Mention} as a member! Are they in the server?\n```\n{e.Message}```", ephemeral: true);
+                    return;
+                }
+
+                var currentValue = await Program.db.HashGetAsync($"nicknamelock", discordUser.Id);
+
+                if (currentValue.HasValue)
+                {
+                    await ctx.RespondAsync($"{Program.cfgjson.Emoji.Error} {discordUser.Mention} is already nickname locked!", mentions: false);
+                } else
+                {
+                    await Program.db.HashSetAsync("nicknamelock", discordUser.Id, member.DisplayName);
+                    var msg = $"{Program.cfgjson.Emoji.On} Nickname locked {discordUser.Mention} as `{member.DisplayName}`!";
+                    await ctx.RespondAsync(msg, mentions: false);
+                    await LogChannelHelper.LogMessageAsync("nicknames", msg);
+                }
+            }
+
+            [SlashCommand("disable", "Allow a member to change their nickname again.")]
+            public async Task NicknameLockDisableSlashCmd(InteractionContext ctx, [Option("member", "The member to remove the nickname lock for.")] DiscordUser discordUser)
+            {
+                DiscordMember member = default;
+
+                try
+                {
+                    member = await ctx.Guild.GetMemberAsync(discordUser.Id);
+                }
+                catch (Exception e)
+                {
+                    await ctx.RespondAsync($"{Program.cfgjson.Emoji.Error} Failed to find {discordUser.Mention} as a member! Are they in the server?\n```\n{e.Message}```", ephemeral: true);
+                    return;
+                }
+
+                var currentValue = await Program.db.HashGetAsync($"nicknamelock", discordUser.Id);
+
+                if (currentValue.HasValue)
+                {
+                    await Program.db.HashDeleteAsync("nicknamelock", discordUser.Id);
+                    var msg = $"{Program.cfgjson.Emoji.Off} Removed nickname lock for {discordUser.Mention}!";
+                    await ctx.RespondAsync(msg, mentions: false);
+                    await LogChannelHelper.LogMessageAsync("nicknames", msg);
+                }
+                else
+                {
+                    await ctx.RespondAsync($"{Program.cfgjson.Emoji.Error} {discordUser.Mention} is not nickname locked!", mentions: false);
+                }
+            }
+
+                [SlashCommand("status", "Check the status of nickname lock for a member.")]
+            public async Task NicknameLockStatusSlashCmd(InteractionContext ctx, [Option("member", "The member whose nickname lock status to check.")] DiscordUser discordUser)
+            {
+                if ((await Program.db.HashGetAsync("nicknamelock", discordUser.Id)).HasValue)
+                    await ctx.RespondAsync($"{Program.cfgjson.Emoji.On} {discordUser.Mention} is nickname locked.", mentions: false);
+                else
+                    await ctx.RespondAsync($"{Program.cfgjson.Emoji.Off} {discordUser.Mention} is not nickname locked.", mentions: false);
+            }
+        }
+    }
+
+}

Events/MemberEvents.cs

@@ -197,6 +197,25 @@ public static async Task GuildMemberUpdated(DiscordClient client, GuildMemberUpd
             if (differrence > 10 && !userMute.IsNull && !e.Member.Roles.Contains(muteRole))
                 db.HashDeleteAsync("mutes", e.Member.Id);
 
+            // Nickname lock check
+            var nicknamelock = await db.HashGetAsync("nicknamelock", e.Member.Id);
+
+            if (nicknamelock.HasValue)
+            {
+                if (e.Member.DisplayName != nicknamelock)
+                {
+                    var oldName = e.Member.DisplayName;
+                    await e.Member.ModifyAsync(a =>
+                    {
+                        a.Nickname = nicknamelock.ToString();
+                        a.AuditLogReason = "Nickname lock applied, reverting nickname change. Nice try though.";
+                    });
+                    await LogChannelHelper.LogMessageAsync("nicknames", $"{cfgjson.Emoji.MessageEdit} Reverted nickname change from {e.Member.Mention}: `{oldName}`");
+                }
+                // We don't want to run the dehoist checks on locked nicknames, else it may cause a fight between the two.
+                return;
+            }
+
             DehoistHelpers.CheckAndDehoistMemberAsync(e.Member);
 
             // Persist permadehoists
@@ -220,6 +239,25 @@ public static async Task UserUpdated(DiscordClient client, UserUpdatedEventArgs
 
             var member = await homeGuild.GetMemberAsync(e.UserAfter.Id);
 
+            // Nickname lock check
+            var nicknamelock = await db.HashGetAsync("nicknamelock", member.Id);
+
+            if (nicknamelock.HasValue)
+            {
+                if (member.DisplayName != nicknamelock)
+                {
+                    var oldName = member.DisplayName;
+                    await member.ModifyAsync(async a =>
+                    {
+                        a.Nickname = nicknamelock.ToString();
+                        a.AuditLogReason = "Nickname lock applied, reverting nickname change. Nice try though.";
+                    });
+                    await LogChannelHelper.LogMessageAsync("nicknames", $"{cfgjson.Emoji.MessageEdit} Reverted nickname change from {member.Mention}: `{oldName}`");
+                }
+                // We don't want to run the dehoist checks on locked nicknames, else it may cause a fight between the two.
+                return;
+            }
+
             DehoistHelpers.CheckAndDehoistMemberAsync(member);
             ScamHelpers.UsernameCheckAsync(member); ;
         }

config.json

@@ -286,6 +286,9 @@
     },
     "mentions": {
       "channelId": 1018252827254063224
+    },
+    "nicknames": {
+      "channelId": 1280688061528674314
     }
   },
   "botOwners": [