Utilities

Different utilities/helper functions are used to make the process easier and make's the code more cleaner

Body Parser

Discord want's us to receive the request as a rawBody and not parsed one therefore this process is needed before the actual command execution process begins

import { NextApiRequest } from "next";

// https://github.com/vercel/next.js/blob/86160a5190c50ea315c7ba91d77dfb51c42bc65f/test/integration/api-support/pages/api/no-parsing.js
export const rawBodyToString = async (req: NextApiRequest): Promise<string> => {
  const chunks: Buffer[] = [];
  return new Promise((resolve, reject) => {
    req.on("error", (error) => {
      reject(error);
    });
    req.on("data", (chunk) => {
      chunks.push(chunk);
    });
    req.on("end", () => {
      resolve(Buffer.concat(chunks).toString());
    });
  });
};

Check Method

Simply checks the http method.

import { NextApiRequest } from "next";

type httpMethods = "PUT" | "POST" | "GET" | "DELETE";
export default function allowedMethod(req: NextApiRequest, allowedMethod: httpMethods) {
  return req.method === allowedMethod;
}

getCommands

This will fetch all of the command files simply return a object with all of the commands name and their exports
ex. output

{
ping:{ execute:Function,register:SlashCommandBuilderObject}
help:{ execute:Function,register:SlashCommandBuilderObject}
}

import { APIApplicationCommandInteraction, APIInteractionResponse } from "discord-api-types/v10";
import { SlashCommandBuilder } from "@discordjs/builders";
import { resolve } from "path";
import getTsFiles from "./getTsFiles";

type commandModule = {
  execute: (interaction: APIApplicationCommandInteraction) => Promise<APIInteractionResponse>;
  register: SlashCommandBuilder;
};

const getCommands = async () => {
  const commandDir = resolve(process.cwd(), "pages", "api", "discord-bot", "commands");
  const commandFiles = getTsFiles(commandDir);
  const commands: { [key: string]: commandModule } = {};
  for (const file of commandFiles) {
    try {
      const fileContents = (await import("../pages/api/discord-bot/commands/" + file)) as commandModule;
      if (fileContents) commands[file] = fileContents;
    } catch (error) {
      continue;
    }
  }
  return commands;
};

export default getCommands;

getTsFiles

get's all ts files from a directory and returns a string of array with the names of the ts files.

import { readdirSync } from "fs";

export default function getTsFiles(dir: string) {
  const files = readdirSync(dir).filter((file) => file.endsWith(".ts"));
  return files;
}