Remove all collection's documents and subcollections using firebase-admin

firebaseUtils.js

const removeDocumentCollectionsRecursive = async (docRef) => {
  const collections = await docRef.listCollections();
  return Promise.all(collections.map((colRef) => removeCollectionRecursive(colRef)));
};

const removeDocument = async (docRef) => {
  return docRef.delete();
};

const removeCollectionRecursive = async (colRef) => {
  const docs = await colRef.listDocuments();
  await Promise.all(docs.map((doc) => removeDocumentCollectionsRecursive(doc).then(() => removeDocument(doc))));
}

const removeAllCollectionsRecursive = async (db) => {
  const collections = await db.listCollections();
  return Promise.all(collections.map((colRef) => removeCollectionRecursive(colRef)));
}

const deleteUser = async (auth, uid) => {
  await auth.deleteUser(uid);
  return uid;
}

const listAllAuthUsers = (auth) => {
  const users = [];
  const listAllWithToken = async (nextPageToken) => {
    const result = await auth.listUsers(1000, nextPageToken);
    result.users.forEach((user) => users.push(user.toJSON()));
    if (result.pageToken) {
      return listAllWithToken(result.pageToken);
    }
    return users;
  }
  return listAllWithToken();
}

const removeAllAuthUsers = async (auth) => {
  const users = await listAllAuthUsers(auth);
  const res = await auth.deleteUsers(users.map((u) => u.uid));
  return {
    successCount: res.successCount,
    failureCount: res.failureCount,
  };
}

module.exports = {
  removeCollectionRecursive,
  removeAllCollectionsRecursive,
  removeDocumentCollectionsRecursive,
  removeDocument,
  listAllAuthUsers,
  removeAllAuthUsers,
};