importing json file data into firebase using nodejs script

gistfile1.txt

// https://stackoverflow.com/questions/43951942/how-to-import-a-json-file-to-firebase-database
const firestoreService = require('firestore-export-import')
const serviceAccount = require('./serviceAccount.json')
const fs = require('fs')
const path = require('path')
const tempFileName = `${__dirname}${path.sep}data-temp.json`;
const admin = require('firebase-admin');
// Initialize Firebase Admin SDK
admin.initializeApp({
    credential: admin.credential.cert(serviceAccount)
});

// Get a reference to the Firestore database
const db = admin.firestore();
(async () => {
    try {
        const fileContents = fs.readFileSync(`${__dirname}/src/data.json`, 'utf8');
        const data = JSON.parse(fileContents);
        const transformed = transformDataForFirestore(data);
        fs.writeFileSync(tempFileName, JSON.stringify(transformed));
        await jsonToFirestore();
        fs.unlinkSync(tempFileName);
    } catch (error) {
        console.error('Error occurred during the import process:', error);
    }
})();
async function jsonToFirestore() {
    try {
        console.log('Initialzing Firebase')
        await firestoreService.initializeFirebaseApp(serviceAccount)
        console.log('Firebase Initialized')

        await firestoreService.restore(db, tempFileName)
        console.log('Upload Success')
    } catch (error) {
        console.log(error)
    }
}

// In order to preserve ids in data.json
// as ids in firestore
// must use keyed object (id being the key) instead of array of records
function transformDataForFirestore(data) {
    const collections = {...data}; // Create a shallow copy to avoid mutating the original 'data'
    delete collections.stats;

    const collectionsById = {};

    Object.keys(collections).forEach((collectionKey) => {
        collectionsById[collectionKey] = {};

        // Check if 'collection' is an array before iterating
        const collection = collections[collectionKey];
        if (Array.isArray(collection)) {
            collection.forEach((record) => {
                collectionsById[collectionKey][record.id] = {...record}; // Create a copy of 'record' to avoid modifying the original object
                delete collectionsById[collectionKey][record.id].id;
            });
        } else {
            console.error(`The collection '${collectionKey}' is not an array.`);
            // Decide how to handle this scenario, whether to skip or handle differently
        }
    });

    return collectionsById;
}