SupportChild/Commands/AddCommand.cs

using System;
using System.Threading.Tasks;
using DSharpPlus;
using DSharpPlus.Entities;
using DSharpPlus.SlashCommands;
using DSharpPlus.SlashCommands.Attributes;

namespace SupportChild.Commands;

public class AddCommand : ApplicationCommandModule
{
	[SlashRequireGuild]
	[SlashCommand("add", "Adds a user to a ticket")]
	public async Task OnExecute(InteractionContext command, [Option("User", "User to add to ticket.")] DiscordUser user)
	{
		// Check if ticket exists in the database
		if (!Database.IsOpenTicket(command.Channel.Id))
		{
			await command.CreateResponseAsync(new DiscordEmbedBuilder
			{
				Color = DiscordColor.Red,
				Description = "This channel is not a ticket."
			}, true);
			return;
		}

		DiscordMember member;
		try
		{
			member = (user == null ? command.Member : await command.Guild.GetMemberAsync(user.Id));

			if (member == null)
			{
				await command.CreateResponseAsync(new DiscordEmbedBuilder
				{
					Color = DiscordColor.Red,
					Description = "Could not find that user in this server."
				}, true);
				return;
			}
		}
		catch (Exception)
		{
			await command.CreateResponseAsync(new DiscordEmbedBuilder
			{
				Color = DiscordColor.Red,
				Description = "Could not find that user in this server."
			}, true);
			return;
		}

		try
		{
			await command.Channel.AddOverwriteAsync(member, Permissions.AccessChannels);
			await command.CreateResponseAsync(new DiscordEmbedBuilder
			{
				Color = DiscordColor.Green,
				Description = "Added " + member.Mention + " to ticket."
			});

			// Log it if the log channel exists
			DiscordChannel logChannel = command.Guild.GetChannel(Config.logChannel);
			if (logChannel != null)
			{
				await logChannel.SendMessageAsync(new DiscordEmbedBuilder
				{
					Color = DiscordColor.Green,
					Description = member.Mention + " was added to " + command.Channel.Mention +
								  " by " + command.Member.Mention + "."
				});
			}
		}
		catch (Exception)
		{
			await command.CreateResponseAsync(new DiscordEmbedBuilder
			{
				Color = DiscordColor.Red,
				Description = "Could not add " + member.Mention + " to ticket, unknown error occured."
			}, true);
		}
	}
}