SupportChild/Commands/AddStaffCommand.cs

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

namespace SupportChild.Commands;

public class AddStaffCommand : ApplicationCommandModule
{
    [SlashRequireGuild]
    [SlashCommand("addstaff", "Adds a new staff member.")]
    public async Task OnExecute(InteractionContext command, [Option("User", "User to add to staff.")] DiscordUser user)
    {
        DiscordMember staffMember = null;
        try
        {
            staffMember = user == null ? command.Member : await command.Guild.GetMemberAsync(user.Id);

            if (staffMember == 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;
        }

        await using MySqlConnection c = Database.GetConnection();
        MySqlCommand cmd = Database.IsStaff(staffMember.Id) ? new MySqlCommand(@"UPDATE staff SET name = @name WHERE user_id = @user_id", c) : new MySqlCommand(@"INSERT INTO staff (user_id, name) VALUES (@user_id, @name);", c);

        c.Open();
        cmd.Parameters.AddWithValue("@user_id", staffMember.Id);
        cmd.Parameters.AddWithValue("@name", staffMember.DisplayName);
        cmd.ExecuteNonQuery();
        cmd.Dispose();

        await command.CreateResponseAsync(new DiscordEmbedBuilder
        {
            Color = DiscordColor.Green,
            Description = staffMember.Mention + " was added to staff."
        });

        // 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 = staffMember.Mention + " was added to staff.\n"
            });
        }
    }
}