Automatically insert WhatsApp messages from Prestashop module

I have a module that I developed and I want to add one extra option: I want to allow my customers to set automatic messages to be sent automatically to WhatsApp account, to all contacts. The schedule should allow recurence: once per year, month, week, day, hour, or minute The schedule should also allow for "one time" send on a specific date and time There should be a field where people can write a message to be sent