index-03.js

/* HELPER FUNCTIONS */

function selectRandomFact() {
    const FACTS_ARRAY = ['description', 'released', 'global', 'regions',
        'geographies', 'platforms', 'categories', 'products', 'cognitive',
        'compliance', 'first', 'certifications', 'competition', 'functions'];

    return FACTS_ARRAY[Math.floor(Math.random() * FACTS_ARRAY.length)];
}

function buildFactResponse(factToQuery) {
    return new Promise((resolve, reject) => {
        if (factToQuery.toString().trim() === 'random') {
            factToQuery = selectRandomFact();
        }

        const query = datastore
            .createQuery('AzureFact')
            .filter('__key__', '=', datastore.key(['AzureFact', factToQuery]));

        datastore
            .runQuery(query)
            .then(results => {
                resolve(results[0][0]);
            })
            .catch(err => {
                console.log(`Error: ${err}`);
                reject(`Sorry, I don't know the fact, ${factToQuery}.`);
            });
    });
}


/* ENTRY POINT */

exports.functionAzureFactsAction = functions.https.onRequest(app);