import-user-to-firebase.js

/**
 * Made By Vann-Dev
 * 
 * IMPORT USER & UN ENCRYPTED PASSWORD TO FIREBASE AUTH
 */

const admin = require("firebase-admin");

/**
 * Path to ServiceAccount
 */
const serviceAccount = require("./tempService.json");

const bcypt = require('bcrypt');

admin.initializeApp({
    credential: admin.credential.cert(serviceAccount)
});

/**
 * Path to user data json
 */
const allUsers = require("./production.User.json")

const batchSize = 1000;
const userBatches = [];
for (let i = 0; i < allUsers.length; i += batchSize) {
    userBatches.push(allUsers.slice(i, i + batchSize));
}

async function importUserBatch(userBatch) {
    const salt = bcypt.genSaltSync()

    console.log("Updating: " + userBatch.length)

    const userRecords = userBatch.map(user => ({
        uid: user._id.$oid,
        email: user.email,
        passwordHash: Buffer.from(bcypt.hashSync(user.password, salt))
    }));

    console.log("Uploading: " + userRecords.length)

    try {
        const result = await admin.auth().importUsers(userRecords, {
            hash: {
                algorithm: 'BCRYPT',
            },
        });
        console.log('Successfully imported', result.successCount, 'users');
        if (result.failureCount > 0) {
            console.log('Failed to import', result.failureCount, 'users');
        }
    } catch (error) {
        console.error('Error importing users:', error);
    }
}

// Import each batch
(async function () {
    console.log("Running")
    for (const userBatch of userBatches) {
        await importUserBatch(userBatch);
    }
})();