/**

Download images from a file containing URLS.

The URL file must contain a single URL per line.

*/

const path = require('path')

const fs = require('fs')

const http = require('http')

const https = require('https')

const Stream = require('stream').Transform

const inputFile = path.join(process.cwd(), process.argv[2])

const outputDir = path.join(process.cwd(), process.argv[3])

const basename = path.basename(inputFile)

const imageURLS = fs.readFileSync(inputFile, 'utf8').split('\n').map(url => url.trim()).filter(url => url)

let successCount = 0

let errorCount = 0

function onEnd(err) {

}

imageURLS.forEach((url, i) => {

const { request } = url.indexOf('http:') === 0 ? http : https

const ext = path.extname(url)

const r = request(url.trim(), (response) => {

const data = new Stream()

response.on('data', (chunk) => {

data.push(chunk);

})

response.on('error', onEnd)

response.on('end', () => {

fs.writeFileSync(path.join(outputDir, `${basename}_${i}${ext}`), data.read())

onEnd()

})

})

r.on('error', onEnd)

r.end()

})