firestoreDB to JSON to firestoreDB

export_db.js

const admin = require('firebase-admin');
const fs = require('fs');

var serviceAccount = require('../../../../../../Private/myschool-data_transfer-key.json'); //how to setup your keys https://hackernoon.com/filling-cloud-firestore-with-data-3f67d26bd66e
admin.initializeApp({ credential: admin.credential.cert(serviceAccount) });

const schema = { //only collection names
	feedback: {},
	schools: {
		califications: {},
		grades: {},
	}
};

const db_2_JSON = (db, schema, current) => {
	return Promise.all(Object.keys(schema).map(collection => {
		return db.collection(collection).get()
			.then(data => {
				let promises = [];
				data.forEach(doc => {
					if (!current[collection]) current[collection] = { __type__: 'collection' };
					current[collection][doc.id] = doc.data();
					promises.push(db_2_JSON(db.collection(collection).doc(doc.id), schema[collection], current[collection][doc.id]));
				});
				return Promise.all(promises);
			});
	})).then(() => current);
};

db_2_JSON(admin.firestore(), { ...schema }, {})
	.then(res => fs.writeFileSync('./src/native_web/utils/local_db.json', JSON.stringify(res, null, 2), 'utf8'));

import_db.js

const admin = require('firebase-admin');
const fs = require('fs');

var serviceAccount = require('../../../../../../Private/myschool-data_transfer-key.json'); //how to setup your keys https://hackernoon.com/filling-cloud-firestore-with-data-3f67d26bd66e
admin.initializeApp({ credential: admin.credential.cert(serviceAccount) });

const schema = { //only collection names
	feedback: {},
	schools: {
		califications: {},
		grades: {},
	}
};

const JSON_2_db = (_JSON, db, schema) => {
	return Promise.all(Object.keys(schema).map(collection => {
		let promises = [];
		Object.keys(_JSON[collection]).map(_doc => {
			const doc_id = _doc; if(_doc === '__type__') return;
			let doc_data =  Object.assign({}, _JSON[collection][_doc]);
			Object.keys(doc_data).map(_doc_data => {
				if(doc_data[_doc_data] && doc_data[_doc_data]['__type__']) delete doc_data[_doc_data];
			});
			promises.push(
				db.collection(collection).doc(doc_id)
					.set(doc_data).then(() => {
						return JSON_2_db(_JSON[collection][_doc], db.collection(collection).doc(doc_id), schema[collection]);
					})
			);
		});
		return Promise.all(promises);
	}));
};

JSON_2_db(JSON.parse(fs.readFileSync('./src/native_web/utils/local_db.json', 'utf8')), admin.firestore(), { ...schema })
	.then(() => console.log('imported'));