Recommender status info

[reckart]

Is your feature request related to a problem? Please describe.
There is currently no way for the user to see the status of recommenders.

Describe the solution you'd like
Add recommender status information to the recommender sidebar showing some or all of the following information:

• recommender name (in sidebar)
• training set size (in sidebar)
• training time (in recommender log available from sidebar)
• evaluation set size (in sidebar)
• evaluation time (in recommender log available from sidebar)
• selection time (in recommender log available from sidebar)
• accuracy (in sidebar)
• active/not active (in sidebar)

It would also be nice if there would be an indication telling if the recommender is currently ready to generate predictions / being (re-)trained, e.g.: initial training (not ready), re-training (ready but being updated), ready (ready, not being updated atm)

Describe alternatives you've considered
No alternative ideas.

[reckart]

@UWinch @Sibgha360 I have added a list of recommenders into the sidebar now, but it �is not yet very pretty and doesn't show all the info listed above.

I think it would be great to look how to make it such that it updates via websocket whenever training/selection tasks start/complete.

Also it would probably be a good idea to only show the recommender title and state by default and allow the user to click on some button or on the title to expand it and only then show all the details.

[UWinch]

@reckart I started working on this and would like to clarify:

1. What exactly do you feel should be prettier, only the collapsible list or also other things?
2. You added the evaluationresult to the activeRecommenders to access them in this list. Is this a workaround that should be changed and now be updated via websocket messages?
   Thx.

[reckart]

Wrt. 1: Well, I think it doesn't look particularly slick. I used the bootstrap list group and badges because it was quick, not because I think they are very pretty. I think they work ok on the project overview page, but in a sidebar, I feel they take up quite a bit of space. Anyway... here are some more things I thought about:

• color the active/off indicator
• when websocked is enabled, add some (animated) indicator saying whether training is in progress, training is complete, or training had an error
• provide access to the messages which we now (can) have in the RecommenderContext, and actually produce some messages. Maybe even replace the static display of the four metrics that I added by a generic access to the messages and simply write the metrics out to the messages.
• add buttons to enable/disable a particular recommender per user
• add buttons to show/hide the suggestions produced by a particular recommender - this could also control whether the respective recommender is shown in the graph
• remove the labels from the graph and instead add an indicator next to each recommender in the list below saying which color it is has in the graph
• add font-awesome glyphs to the buttons
• think about how to do scrolling in the sidebar, i.e. which parts should always be visible and which parts should scroll?
• ... these just off the top of my mind

Wrt 2. I think they should stay. As for the WS messages: we could send the metrics/evaluation result along with the message or we could just use the message as a trigger to re-render the metrics which are picked up from the evaluation result that is attached to the respective active recommender. Naively, I'd probably go with the latter - sounds like you had the former in mind.