calcom/apps/web/pages/api/schedule/index.ts

import type { NextApiRequest, NextApiResponse } from "next";

import { getSession } from "@lib/auth";
import { getAvailabilityFromSchedule } from "@lib/availability";
import prisma from "@lib/prisma";

export default async function handler(req: NextApiRequest, res: NextApiResponse) {
  const session = await getSession({ req });
  const userId = session?.user?.id;
  if (!userId) {
    res.status(401).json({ message: "Not authenticated" });
    return;
  }

  if (!req.body.schedule || req.body.schedule.length !== 7) {
    return res.status(400).json({ message: "Bad Request." });
  }

  const availability = getAvailabilityFromSchedule(req.body.schedule);

  if (req.method === "POST") {
    try {
      await prisma.user.update({
        where: {
          id: userId,
        },
        data: {
          availability: {
            /* We delete user availabilty */
            deleteMany: {
              userId: {
                equals: userId,
              },
            },
            /* So we can replace it */
            createMany: {
              data: availability.map((schedule) => ({
                days: schedule.days,
                startTime: schedule.startTime,
                endTime: schedule.endTime,
              })),
            },
          },
        },
      });
      return res.status(200).json({
        message: "created",
      });
    } catch (error) {
      console.error(error);
      return res.status(500).json({ message: "Unable to create schedule." });
    }
  }
}