Chatbox for my website using node.js

I want to implement a chat box on a few pages of my website using node.js. The chat box will be a giant chatroom for all members currently online. The chat will be on 3 main pages of the site and should be the same chat room so whichever page you are on, the all users online should still be able to chat with each other. The website admin should have the authority to easily ban members from chat for x minutes using their username. User should be able to send private messages to each other using the recipient's username so only the recipient and sender sees that message in the chat. Users can also have a block list and option to report spammers. Only registered users on the site are allowed to use the chat room but guests should see the chat room and conversation.