medium_prompt_article_3.js

'use strict';
const Promise = require("bluebird");

const records = [{
    'title': null,
    'lat'  : 9.1111,
    'lng'  : 5.1111,
    'desc' : 'A record missing a title'
},{
    'title': "Not missing data",
    'lat'  : 9.1111,
    'lng'  : 5.1111,
    'desc' : 'Some description'
},{
    'title': null,
    'lat'  : 9.1111,
    'lng'  : 5.1111,
    'desc' : 'Another record missing a title with unicode chars (هذا نص عربي)'
}];

async function getUserInput(missing_record) {

    const puppeteer = require('puppeteer');
    
    return new Promise(async (resolve, reject) => {

        //This message we will show the user
        const prompt_msg = `Missing data: ${missing_record.desc}, please input value \n`;
        
        //Construct a URL using longitude and latitude values from the record
        const url = `https://www.google.com/maps/@?api=1&map_action=map&center=${missing_record.lat},${missing_record.lng}&zoom=10`;
        
        //Create a browser object, we want the user to interact so we set headless to be false
        const browser = await puppeteer.launch({'headless': false});
        
        //Create a new page (think new tab)
        const page = await browser.newPage();
        
        //Goto Google maps 
        await page.goto(url);
        
        const result = await page.evaluate((msg) => {
            /*
            This function will run within our puppeteer browser window, and if we return a promise,
            page.evaluate() will wait for it to resolve, so we return a promise that resolves
            when the user responds
            */
            return new Promise((resolve, reject) => {
                resolve(prompt(msg));
            });                
        }, prompt_msg);
        
        //Close our browser
        await browser.close();
        
        //Return user input to the calling method 
        resolve(result);
        
    });
}
async function processData() {

    for(const record of records) {
        if(!record.title) {
            console.log("Prompting user for response");
            record.title = await getUserInput(record);
            console.log("Got user response");
        }
        console.log(`Record title is ${record.title}`);
    }

}

processData();