Barmen statistics

[corentingiraud]

Is your feature request related to a problem? Please describe.
Application doesn't provide any stats on barmen services

Describe the solution you'd like
A simple endpoint GET /api/v1/barmen/:id/statistics with the following response body:

{
  hoursOfService: number;
  barmenWhichSpendTheMostTimeWith: {
    barman: Barman;
    nbHours: number;
  }[];
  barmenWhichSpendTheLessTimeWith: {
    barman: Barman;
    nbHours: number;
  }[];
}

[corentingiraud]

@Embraser01 What do you think ?

[Embraser01]

I started to migrate a big part of the K-App to moleculer this weekend, including barmen objects.

There is still a lot of work to do (specially in the front...) as I changed the data model: Barman is in user.account and will contain it's roles and kommissions but not its services. Services will contains the list of barmen.

Anyway, depending on the priority:

• If it's not urgent, I'd recommend waiting the migration to moleculer in order to make a good base for statistics (I made some research for members statistics last week).
• Otherwise, you could implement a fast (and maybe dirty) stats endpoint with these two stats

I'm looking to finish my work (here) soon but I don't think I'll have time before next week