voidy / packages / framework / src / middleware / requirePermission.ts

import {
  MessageFlags,
  type ChatInputCommandInteraction,
  type PermissionResolvable,
} from "discord.js";
import type { Middleware } from "../types/Middleware";

export function requirePermission(
  permission: PermissionResolvable,
): Middleware<ChatInputCommandInteraction> {
  return async (interaction, _client, next) => {
    if (!interaction.memberPermissions?.has(permission)) {
      await interaction.reply({
        content: "You do not have permission to use this command.",
        flags: [MessageFlags.Ephemeral],
      });
      return;
    }

    await next();
  };
}