discordeno/plugins/permissions/src/misc/mod.ts

import { BotWithCache } from "../../deps.ts";

export function editBotProfile(bot: BotWithCache) {
  const editBotProfileOld = bot.helpers.editBotProfile;

  bot.helpers.editBotProfile = function (
    options,
  ) {
    // Nothing was edited
    if (!options.username && options.botAvatarURL === undefined) {
      throw new Error(
        "There was no change to the username or avatar found in the request.",
      );
    }
    // Check username requirements if username was provided
    if (options.username) {
      if (options.username.length > 32) {
        throw new Error(
          "A username for the bot must be less than 32 characters.",
        );
      }
      if (options.username.length < 2) {
        throw new Error(
          "A username for the bot can not be less than 2 characters.",
        );
      }
      if (
        ["@", "#", ":", "```"].some((char) => options.username!.includes(char))
      ) {
        throw new Error("A bot username can not include @ # : or ```");
      }
      if (["discordtag", "everyone", "here"].includes(options.username)) {
        throw new Error(
          "A bot username can not be set to `discordtag` `everyone` and `here`",
        );
      }
    }

    return editBotProfileOld(options);
  };
}

export default function setupMiscPermChecks(bot: BotWithCache) {
  editBotProfile(bot);
}