Cloud Functions Demo

index.js

// functions/index.js
const admin = require('firebase-admin');
const functions = require('firebase-functions');
// path to a service account key JSON file
const serviceAccount = require("./account_key.json");
// Lightweight JavaScript date library for parsing, validating, 
// manipulating, and formatting dates.
const moment = require('moment');
// Serpwow module
const SerpWow = require('google-search-results-serpwow');


// create the serpwow object, passing in our API key
const serpwow = new SerpWow(API_KEY');
// Initialize the default app
admin.initializeApp({
    credential: admin.credential.cert(serviceAccount),
    databaseURL: "https://APP_ID.firebaseio.com"
});


// minimum time period(i.e. 'from') search parameter
const min_date = moment().subtract(1, 'days').format("MM/DD/YYYY");
// maximum time period(i.e. 'to') search parameter
const max_date = moment().format("MM/DD/YYYY");

// set up the search parameters, 
const params = {
    q: 'freetown',
    search_type: 'news',
    news_type: 'all',
    num: '10',
    time_period: 'custom',
    sort_by: 'date',
    time_period_min: min_date,
    time_period_max: max_date
};

// The function scheduled to run every 12 hours
exports.scheduledFunction = functions.pubsub.schedule('every 12 hours').onRun(async (context) => {
    // retrieve the search results as JSON
    await serpwow.json(params)
        .then(result => {
            // Articles Firestore CollectionReference
            const articlesRef = admin.firestore().collection('articles');

            // Save search results to Firestore
            const articles = result["news_results"]
            articles.forEach(article => {            
                const id = article['date_utc'] + article['position']
                articlesRef
                    .doc(id)
                    .set(article)
                    .catch(error => {
                        console.log(error);
                    })
            });            
        })
        .catch(error => {
            console.log(error);            
        });
    return null;
})