SupportChild/Commands/RemoveCategoryCommand.cs

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

namespace SupportChild.Commands;

public class RemoveCategoryCommand : ApplicationCommandModule
{
    [SlashRequireGuild]
    [SlashCommand("removecategory", "Removes the ability for users to open tickets in a specific category.")]
    public async Task OnExecute(InteractionContext command, [Option("Category", "The category to remove.")] DiscordChannel channel)
    {
        if (!Database.TryGetCategory(channel.Id, out Database.Category _))
        {
            await command.CreateResponseAsync(new DiscordEmbedBuilder
            {
                Color = DiscordColor.Red,
                Description = "That category is not registered."
            }, true);
            return;
        }

        if (Database.RemoveCategory(channel.Id))
        {
            await command.CreateResponseAsync(new DiscordEmbedBuilder
            {
                Color = DiscordColor.Green,
                Description = "Category removed."
            }, true);
        }
        else
        {
            await command.CreateResponseAsync(new DiscordEmbedBuilder
            {
                Color = DiscordColor.Red,
                Description = "Error: Failed removing the category from the database."
            }, true);
        }
    }
}