Ravelin Code Test

Summary

We need an HTTP server that will accept any POST request (JSON) from multiple clients' websites. Each request forms part of a struct (for that particular visitor) that will be printed to the terminal when the struct is fully complete.

For the JS part of the test please feel free to use any libraries that may help you but please only use the Go standard library for the backend. Remember to keep things simple.

Frontend (JS)

Insert JavaScript into the index.html (supplied) that captures and posts data every time one of the below events happens; this means you will be posting multiple times per visitor. Assume only one resize occurs.

if the screen resizes, the before and after dimensions
copy & paste (for each field)
time taken from the 1st character typed to clicking the submit button

Example JSON Requests

{
  "eventType": "copyAndPaste",
  "websiteUrl": "https://ravelin.com",
  "sessionId": "123123-123123-123123123",
  "pasted": true,
  "formId": "inputCardNumber"
}

{
  "eventType": "timeTaken",
  "websiteUrl": "https://ravelin.com",
  "sessionId": "123123-123123-123123123",
  "time": 72, // seconds
}

...

Backend (Go)

Part 1

The Backend must to:

Create a Server
Accept POST requests in JSON format similar to those specified above
Map the JSON requests to relevant sections of the data struct (specified below)
Print the struct for each stage of its construction
Also print the struct when it is complete (i.e. when the form submit button has been clicked)

Part 2

Write a simple hashing function (your implementation - either of your own design or a known algorithm), that given a string will calculate a hash of that string
Use that function to calculate the hash of the WebSiteurl field and print the hash, and print out the hash once calculated.

Go Struct

type Data struct {
	WebsiteUrl         string
	SessionId          string
	ResizeFrom         Dimension
	ResizeTo           Dimension
	CopyAndPaste       map[string]bool // map[fieldId]true
	FormCompletionTime int // Seconds
}

type Dimension struct {
	Width  string
	Height string
}

Notes:

Run with: go run main.go hash.go

I was testing the client by running python -m SimpleHTTPServer in the /client dir
Had I had more time I would've written more tests for the server including integration tests for the client
I chose not to use jQuery as I think vanilla JS contains enough tools for the job
It wasn't specified where/when to print the hash value of the website URL so I did it each time a POST request was made
I recognise Go methods could be used to handle the Session and Data functionality but I wasn't sure of the Pros/Cons of the approach due to limited Golang experience - testing would've likely been easier

chrisgreg / code-test