cloud-function-add-to-algolia.js

import * as functions from 'firebase-functions';
import * as admin from 'firebase-admin';
import * as algoliasearch from 'algoliasearch';

admin.initializeApp();

const client = algoliasearch(
    functions.config().algolia.app_id,
    functions.config().algolia.api_key
);

const index = client.initIndex('movie_title');

exports.addMovies = functions.firestore
    .document('movies/{movieId}')
    .onCreate((snap, context) => {
        const data = snap.data();
        const objectID = context.params.movieId

        return index.addObject({
            objectID,
            ...data,
            poster: null,
            metascore: null
        })
    });

This is a cloud functions inside firebase firestore that listens to when a new movie is create in the firestore database. When the onCreate function gets triggered it will create a new autocomplete value in algolia's index.

Algolia is a solution for when you need a fast autocomplete search in your website. And is used often with large databases.

This code works by signing in to firebase and use the configured app_id and api_key to add a movie to algolia's database. After its done it can be suggested to you in a search field as a value to autocomplete your search term.

...data adds all the elements inside the data object. It removes elements poster and metascore by setting it to null.