The problem statement is as follows: You are tasked with making Nukr, a new social media product by Nu Everything S / A. The initial step is to create a prototype service that provides a REST API where we can simulate connections between people, and explore how we would offer new connection suggestions. These are the features required:

• Be able to add a new profile;
• Be able to tag two profiles as connected;
• Be able to generate a list of new connection suggestions for a certain profile, taking the stance that the more connections to profile have with another profile's connections, the better ranked the suggestion should be;
• Some profiles can, for privacy reasons, opt to be hidden from the connection suggestions.

You will need Leiningen 2.0.0 or above installed.

The API has 4 primary endpoints that can be accessed as soon as the application is started.

1 [POST] - http://localhost:3000/add-profile

Make a POST request at this route and pass a JSON like this:

{
    "name": "Bruce",
    "email: "[email protected]"
}

The profile Bruce will be added on the Nukr and a JSON like this will be returned:

{
    "[:user/email \"[email protected]\"]": {
        "user/name": "Bruce",
        "user/email": "[email protected]",
        "user/hidden": false,
        "user/connections": []
}

2 [PUT] - http://localhost:3000/connect-profiles

Make a PUT request at this route and pass a JSON like this:

{

    "host": "[email protected]",
    "guest": "[email protected]"
}

Where HOST is your profile and GUEST is the profile that you want to connect to. The connection will be made to the two profiles. And it will be returned something like:

"[:user/email \"[email protected]\"]": {
    "user/name": "Bruce",
    "user/email": "[email protected]",
    "user/hidden": false,
    "user/connections": [
        "[email protected]"
    ]
},
"[:user/email \"[email protected]\"]": {
    "user/name": "Jason",
    "user/email": "[email protected]",
    "user/hidden": false,
    "user/connections": [
        "[email protected]"
    ]
}

3 [POST] - http://localhost:3000/connection-suggestions

Make a POST request at this route and pass a JSON like this:

{
    "email": "[email protected]"
}

Where email is referenced to the email of your profile. Suggestions are created from the common connections of your own connections, for example: Suppose you are profile the "A" and are connected to profile "B" and "C", and the two are connected to profile "D", then "D" becomes a connection suggestion. And the more connections your own connections have in common, the better ranked are the suggestions for you.

4 [PUT] - http://localhost:3000/change-hidden-status

It is possible that other profiles will receive you as a connection suggestion. To change your privacy status, make a PUT request like this:

{
    "email": "[email protected]",
    "new-status": true
}

This will changed the status hidden false to true

Note: The other profiles can also change the status so they do not appear in your suggestions

To install the dependencies, run:

lein deps

To start a web server for the application, run:

lein ring server

lein test