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Answer.js
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const request = require('request'); | |
const Rx = require('rxjs'); | |
const { expand } = require('rxjs/operators'); | |
const { empty } = require('rxjs/observable/empty'); | |
const URL = 'https://letsrevolutionizetesting.com/challenge'; | |
let makeHttpCall = (url = URL) => { | |
return new Promise((resolve, reject) => { | |
request.get(url, {json: true}, (e, res, body) => { | |
if(e) { | |
reject(e) | |
} | |
resolve(res) | |
}) | |
}) | |
} | |
const calls = Rx.Observable.fromPromise(makeHttpCall(URL)); | |
let ids = calls.pipe( | |
expand(x => { | |
if(typeof x === 'object' && x.body.hasOwnProperty('follow')) { | |
return makeHttpCall(x.body.follow) | |
} | |
console.log('Followed Until End:' + x.body.message) | |
return empty() | |
}) | |
).takeWhile(x => x.hasOwnProperty('body')) | |
ids.subscribe( | |
(x) => { | |
if(typeof x === 'string') { | |
console.log('done', x) | |
} | |
console.log('Following...') | |
}, | |
(e) => { | |
console.log('Error', e) | |
}, | |
() => { | |
console.log('Yay all done!') | |
} | |
) | |
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