SupportChild/Commands/RemoveStaffCommand.cs

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

namespace SupportChild.Commands;

public class RemoveStaffCommand : ApplicationCommandModule
{
    [SlashRequireGuild]
    [SlashCommand("removestaff", "Removes a staff member.")]
    public async Task OnExecute(InteractionContext command, [Option("User", "User to remove from staff.")] DiscordUser user)
    {
        if (!Database.IsStaff(user.Id))
        {
            await command.CreateResponseAsync(new DiscordEmbedBuilder
            {
                Color = DiscordColor.Red,
                Description = "User is already not registered as staff."
            }, true);
            return;
        }

        await using MySqlConnection c = Database.GetConnection();
        c.Open();
        MySqlCommand deletion = new MySqlCommand(@"DELETE FROM staff WHERE user_id=@user_id", c);
        deletion.Parameters.AddWithValue("@user_id", user.Id);
        deletion.Prepare();
        deletion.ExecuteNonQuery();

        await command.CreateResponseAsync(new DiscordEmbedBuilder
        {
            Color = DiscordColor.Green,
            Description = "User was removed from staff."
        }, true);

        // 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 = "User was removed from staff.\n"
            });
        }
    }
}