This is a tricky request and I cant get my head around it completely.
A restaurant delivers only to certain districts within town each day (on an irregular schedule). The webpage shows the next 7 days and for each days the districts for this day. That's up and running.
But people should be notified that the next day its their districts turn, so they dont forget to order (which they do at the moment).
I am thinking of a subscription form where visitors only have to leave their email adress and click their district. Like a newsletter subscription. They should NOT register into Drupal. There are several paths to choose from, but with everyone I tried there was one piece missing.
One could choose Mailchimp with the districts as groups or lists and have the subscribers per district there. But how would Mailchimp know that tomorrow district X will be served and it should send out the mailing.
Tried to get it done with a webform including a term reference to the districts (which are a taxonomy vocabulary), then using Rules to check the the upcoming days districts to the webform submissions term references with the same value. No luck so far.
Simplenews might be an option, but it seems it doesnt have the capability to ad a term reference field to subscribers.
Anyone having an idea, I am eager to listen to everyone.
thanks in advance
ps: all in Drupal 8