I've been asked to build a large tool on SharePoint 2013 so I've broken it down into parts and starting to learn some of the basics. I'm fairly new to SP 13 and have a little knowledge on JS but nothing to this level. Basically I need to be able to identify who the user is by looking at their active directory.
Every user would have had to sign into our office network and the tool is hosted on our internal intranet SP 13 servers.
I just need to get an idea of the code to pull the users name and display it on the screen by looking at their active directory entry.