[NEW] Show department field on Livechat visitor panel

[renatobecker-zz]

Closes #13371

This PR adds the department field of the current Livechat room on Visitor info painel, like the image below:

[juliomac]

Hi @rodrigok ,

How can I get the department information on REST API or, better, on Real-time API?

[renatobecker-zz]

@juliomac, please take a look at our Livechat Docs:

https://rocket.chat/docs/developer-guides/rest-api/livechat/

[juliomac]

Dear @renatobecker, thanks for so quick response!

Before finding this merge and you, I did a bit of homework and went looking through all options in rest-api/livechat. There's call for listing departments, there's calls for retrieving department info, but I could not find any call retrieving what is the exact department this particular visitor came from.

Can you give me a light? What is the call that retrieves the department defined by the below function on the target website?

    RocketChat(function() {
     this.setDepartment('FILL HERE DEPARTMENT NAME - case sensitive');
   });

[juliomac]

Examples of calls that didn't work for me:

curl http://localhost:4000/api/v1/livechat/room?token=< tokenFromVisitor>
      >>> No department information

curl http://localhost:4000/api/v1/livechat/visitor/<tokenFromVisitor>
      >>> No Room nor department information

[renatobecker-zz]

@juliomac, I suggest you create a new issue describing your use case, what do you think?
Thanks.

[juliomac]

Thanks, done it through: #13766