[Nodeshot] Device status

[nemesis]

 In the refactoring branch, at the moment the available status for 
 devices are:

  * archived
  * unplugged
  * not_reachable
  * reachable

 not reachable and reachable are self explanatory.

 not sure about unplugged.

 In another application I work on in my daily job, there is the 
 "unknown" status, which means the system has never reached the device 
 yet, so the system does not know the device. Which makes sense.

 Unplugged is not a type of status that can be automatically determined.

 Archived means that a device is no longer active, but is mantained in 
 the database for some reason.

 Archived and unplugged are similar, because the user would have to set 
 this status manually and the system should avoid trying to contact a 
 device which is archived or unplugged. So I think we should merge 
 archived and unplugged, but find a better name, plus introduce the 
 "unknown" status, which would be the default.

 This is my new proposal:

  * unknown: device has not been seen by the system yet
  * not_reachable: device has been seen in the past but is not reachable 
 now
  * reachable: device is reachable
  * deactivated / unplugged: device has been deactivated manually by the 
 user


 Have your say