Creating "like activities" data for users in Firebase with typescript.

likeDataTransferAPI.ts

import { NextApiRequest, NextApiResponse } from "next";

import { fieldValue, firestore } from "../../firebase/adminApp";

export default async function handler(
  req: NextApiRequest,
  res: NextApiResponse
) {
  try {
    const usersDocs = (await firestore.collection("users").get()).docs;

    const addedLikesDocUsername: string[] = [];

    for (const userDoc of usersDocs) {
      const userPostsDocs = (await userDoc.ref.collection("posts").get()).docs;

      if (userPostsDocs.length > 0)
        for (const userPostDoc of userPostsDocs) {
          const likesDocs = (await userPostDoc.ref.collection("likes").get())
            .docs;

          if (likesDocs.length > 0)
            for (const likeDoc of likesDocs) {
              const likerUsername = likeDoc.id;

              const likeActivityData = {
                likeTime: likeDoc.data().likeTime,
                likedPostDocPath: userPostDoc.ref.path,
              };

              if (addedLikesDocUsername.includes(likerUsername)) {
                await firestore
                  .doc(`users/${likerUsername}/activites/likes`)
                  .update({
                    likesDatas: fieldValue.arrayUnion({ ...likeActivityData }),
                  });
              } else {
                await firestore
                  .doc(`users/${likerUsername}/activites/likes`)
                  .set({
                    likesDatas: fieldValue.arrayUnion({ ...likeActivityData }),
                  });
                addedLikesDocUsername.push(likerUsername);
              }
            }
        }
    }
  } catch (error) {
    console.error("Error while update.", error);
    return res.status(400).json({ Bad: "Very badd" });
  }

  return res.status(200).json({
    status: "Successfull",
  });
}