index.js

var http = require('http')
var path = require('path')
var crypto = require('crypto')
var fs = require('fs')
var getPrice = require('3d-print-price-calculator')

var tmpdir = require('os').tmpdir()

function uuid() {
	return 'xxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
		var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8)
		return v.toString(16)
	})
}

module.exports = function server(db, admesh) {

	// function getPrice(hash,admeshObject, cb) {
	// 	db.get()
	// }

	function saveAdmeshDataToDatabase(hash, stlFilePath, cb) {
		admesh(stlFilePath, function(err, admeshObject) {
			if (err) {
				cb(err, admeshObject)
			} else {
				db.insert(hash, admeshObject, function(err) {
					cb(err, admeshObject)
				})
			}
		})
	}

	return http.createServer(function(req, res) {
		function sendResponseBack(hash, price) {
			res.setHeader("Content-Type", "application/json");
			res.end(JSON.stringify({
				hash: hash,
				price: price
			}))
		}

		var md5 = crypto.createHash('md5')
		var filePath = path.join(tmpdir, uuid())
		console.log("writing to", filePath)
		var file = fs.createWriteStream(filePath)

		req.on('data', function(data) {
			md5.update(data)
			file.write(data)
		}).on('end', function() {
			file.end(function(err) {
				var hash = md5.digest('hex')
				db.get(hash, function(err, result) {
					if (typeof result === 'object') {
						sendResponseBack(hash, getPrice({}, result))
					} else {
						saveAdmeshDataToDatabase(hash, filePath, function(err, obj) {
							sendResponseBack(hash, getPrice({}, obj))
						})
					}
				})
			})
		})
	})
}