sendou.ink/app/features/tournament/core/streams.server.ts

import { getStreams } from "~/modules/twitch";
import { participantTwitchUsersByTournamentId } from "../queries/participantTwitchUsersByTournamentId.server";

export async function streamsByTournamentId({
  tournamentId,
  castTwitchAccounts,
}: {
  tournamentId: number;
  castTwitchAccounts: string[] | null;
}) {
  // prevent error logs in development
  if (
    process.env.NODE_ENV === "development" &&
    !process.env["TWITCH_CLIENT_ID"]
  ) {
    return [];
  }
  const twitchUsersOfTournament =
    participantTwitchUsersByTournamentId(tournamentId);

  const streams = await getStreams();

  const tournamentStreams = streams.flatMap((stream) => {
    const user = twitchUsersOfTournament.find(
      (u) => u.twitch === stream.twitchUserName,
    );

    if (user) {
      return {
        ...stream,
        userId: user.id,
      };
    }

    if (castTwitchAccounts?.includes(stream.twitchUserName)) {
      return {
        ...stream,
        userId: null,
      };
    }

    return [];
  });

  return tournamentStreams;
}