sendou.ink/app/modules/twitch/token.ts

import { cachified } from "cachified";
import { cache } from "~/utils/cache.server";
import { tokenResponseSchema } from "./schemas";
import { getTwitchEnvVars } from "./utils";

async function getFreshToken() {
  const { TWITCH_CLIENT_ID, TWITCH_CLIENT_SECRET } = getTwitchEnvVars();

  const res = await fetch(
    "https://id.twitch.tv/oauth2/token" +
      `?client_id=${TWITCH_CLIENT_ID}` +
      `&client_secret=${TWITCH_CLIENT_SECRET}` +
      "&grant_type=client_credentials",
    { method: "POST" },
  );
  if (!res.ok) {
    throw new Error(
      `Getting Twitch token failed with status code: ${res.status}`,
    );
  }

  const parsed = tokenResponseSchema.safeParse(await res.json());
  if (!parsed.success) {
    throw new Error("Token response schema validation failed");
  }

  return parsed.data.access_token;
}

export function getToken() {
  return cachified({
    key: `twitch-token`,
    cache,
    getFreshValue() {
      // eslint-disable-next-line no-console
      console.log("getting fresh twitch token");
      return getFreshToken();
    },
  });
}

export function purgeCachedToken() {
  cache.delete("twitch-token");
}