server, ics, pages: allow to generate ICS from modules

This adds the ability to generate an ICS file from a module ID, and to
filter it based on its groups.

To do this, you can enter a module ID on the frontpage.  Then, µCS will
fetch the timetable, then return a page where one can select the
group(s) they want to filter (this is enabled by the new
Ics.get_all_groups function).  Then, µCS is able to generate a link to
that calendar, not unlike with a single group ID.

Signed-off-by: Alban Gruin <alban at pa1ch dot fr>

0 files changed, 0 insertions, 0 deletions