Return more information regarding departures

[ialokim]

In other public transport navigation apps, it is often possible to click on a line in the departures screen and see it's complete journey from start to end point.
How this is done under the hood is saving a trip id for each departures result and querying the API again providing this trip id in case of a click.
This is already supported by hafas-client and Navitia has also support for it using the Vehicle-journey endpoint.

Is this something you already thought about? I would like to look into this if you want me to do so and if you could give me some hints where I should start @schildbach.

[ialokim]

Just for the record: hafas-client implements the querying in https://github.com/public-transport/hafas-client/blob/master/index.js#L341.

It seems they return a journey object similar to the normal trip query results.

[schildbach]

I've often thought about this, but never found the time to implement. On Hafas I think I've seen a separate endpoint just for that usecase.