/**

* Reusable base server for exercises. Has all of the features

* we would need to use in a typical lesson. If you need more/less

* and it doesn't fit in with the rest, you should copy this and use

* it as the base for your own.

*/

var envify = require('@workshop/envify-files')

var browserify = require('browserify')

var watchify = require('watchify')

var path = require('path')

var url = require('url')

var fs = require('fs')

var bl = require('bl')

var st = require('st')

module.exports = BasicServer

function BasicServer(dirname) {

var bundler

var serve

return function createServer(answersDirectory) {

var answersTemplate = path.join(dirname, 'submission')

return function(req, res) {

if (!bundler) createBits()

var uri = url.parse(req.url).pathname

if (uri === '/') req.url = '/index.html'

if (uri === '/index.js') {

res.setHeader('content-type', 'text/javascript')

return bundler.bundle().pipe(bl(function(err, bundle) {

if (err) return res.end('document.write(' + JSON.stringify(

'<span style="'

+ 'font-size:12px;'

+ 'font-family: Inconsolata, mono;'

+ 'padding: 2rem;'

+ 'white-space: pre-wrap;'

+ 'display: block;'

+ 'line-height: 1.35rem;'

+ '">'

+ [err.message, err.stack].join('\n')

+ '</span>'

) + ')'

)

res.end(bundle)

}))

}

if (serve(req, res)) return

res.statusCode = 404

res.end('404! :(')

}

function createBits() {

serve = st({ path: dirname, dot: true })

bundler = watchify(browserify({

entries: [path.join(dirname, 'index.js')]

, index: 'index.html'

, insertGlobals: true

, fullPaths: true

, packageCache: {}

, cache: {}

}))

bundler.transform(require.resolve('brfs'))

envify(answersTemplate, answersDirectory, bundler)

bundler.transform(require.resolve('fresh-require/transform'))

// workaround for strange browserify issue

bundler.bundle()

.on('data', function(){})

.on('error', function(){})

.resume()

}

}

}