view flatten APIs with Node.js

view flatten APIs from swagger

const _ = require('lodash')
const fs = require('fs')
var Lazy = require('lazy')

const swaggerDoc = "your.yaml"
const prefixOfURI = "/"
new Lazy(fs.createReadStream(swaggerDoc))
.lines
.map( l => l.toString().trim().slice(0, -1) ) // delete the last char ':'
.filter(line => line.startsWith(prefixOfURI) || ['get', 'post', 'put', 'patch', 'delete'].includes(line) )
.foldr( (x, acc) => {
  if(x.startsWith(prefixOfURI)) {
    acc.push([x])
  } else {
    _.last(acc).push(x)
  }
  return acc;
}, 
[],
results => {
  var xs = _.map(results, uri_verbs => {
    return _.tail(uri_verbs).map(verb => format(verb, _.head(uri_verbs)))
  })
  var flatMap = _.reduce(xs, (apis, acc) => {
    return acc.concat(apis)
  }, [])
  console.log(flatMap.join('\n'))
  console.log("total amount:", flatMap.length)
})

function format(verb, uri) {
  return (verb.toUpperCase() + _.repeat(' ', 4).substring(0, 7) + uri.
}