busStops.js

// Import the readline package from NPM 
import readline from 'readline-sync';
// Import the winston logging package from NPM
// import winston from 'winston/lib/winston/config';
import winston from 'winston'

// Creating a logger
const logger = winston.createLogger({
    transports: [
        new winston.transports.Console(),
        new winston.transports.File({ filename: 'combined.log' })
    ]
});

let locationData = 1;
let busStops;
let busInfo;
let nearestStops = []
while (typeof (locationData) != "string") {
    try {
        // Get the postcode from the user via the terminal
        const postCode = readline.prompt({ prompt: "Postcode: " });
        const postresponse = await fetch(`https://api.postcodes.io/postcodes/${postCode}`);
        if (postresponse.status !== 200) {
            logger.error(`Postcode API error - status ${postresponse.status}, Postcode: ${postCode}`);
            throw `Postcode API error - status ${postresponse.status}`
        }
        locationData = await postresponse.json();
        let lat = locationData.result.latitude
        let long = locationData.result.longitude
        const tflresponse =
            await fetch(`https://api.tfl.gov.uk/StopPoint/?lat=${lat}&lon=${long}&stopTypes=NaptanPublicBusCoachTram`)
        if (tflresponse.status !== 200){
            logger.error(`TfL API error - status ${tflresponse.status}`);
            throw `TfL API error - status ${tflresponse.status}`
        }
        busStops = await tflresponse.json()
        for (let i = 0; i < 2; i++) {
            const busInfoResp =
                await fetch(`https://api.tfl.gov.uk/StopPoint/${busStops.stopPoints[i].naptanId}/Arrivals`);
            if (busInfoResp.status !== 200) {
                logger.error(`Bus Info Response error: ${busInfoResp.status}`);
                throw `Bus Info Response error: ${busInfoResp.status}`;
            }
            const busInfo = await busInfoResp.json();
            if (busInfo.length == 0) {
                logger.error(`No stop information for ${postCode}`);
                throw `No stop information for ${postCode}`
            }
            const sortedBusInfo = busInfo.sort((bus1, bus2) => bus1.timeToStation - bus2.timeToStation);
            // nearestStops.push(busStops.stopPoints[i].naptanId)
            nearestStops.push({"naptanId": busStops.stopPoints[i].naptanId, "commonName":busStops.stopPoints[i].commonName})
            console.log(`Next bus at stop ${busStops.stopPoints[i].commonName} is ${sortedBusInfo[0].lineId} arriving in ${Math.round(sortedBusInfo[0].timeToStation / 60)} mins\n`);
        }
;
        // Ask question...
        const directions = (readline.prompt({prompt: "Do you want directions? Y/N "})).toLowerCase();
        if (directions != "y" && directions != "n")
            throw `Do not understand this response ${directions}. Enter Y or N`;
        else if (directions == "y"){
            for (let j = 0; j < nearestStops.length; j++) {
                const directionsResp = await fetch(`https://api.tfl.gov.uk/Journey/JourneyResults/${postCode}/to/${nearestStops[j].naptanId}`)
            if (directionsResp.status != 200) {
                logger.error(`Unable to direct from ${postCode} to ${nearestStops[j].commonName}`)
                throw `Unable to direct from ${postCode} to ${nearestStops[j].commonName}`
            }
            const route = await directionsResp.json();
            // console.log(route.journeys[0].duration);
            // console.log(route.journeys[0].legs[0].instruction.steps[0].description);
            // loop through steps, display direction and summary to user
            let instructions = ""
            for (let k = 0; k < route.journeys[0].legs[0].instruction.steps.length; k++) {
                instructions += `${route.journeys[0].legs[0].instruction.steps[k].descriptionHeading.trim()} `
                instructions += `on ${route.journeys[0].legs[0].instruction.steps[k].description}. `
            }
            console.log(`Directions from ${postCode.toUpperCase()} to ${nearestStops[j].commonName} are:\n\t${instructions}\n`)
            }
        }
        break
    } catch (err) {
        console.log(err)
    }     
}