How to programmatically get messages from viber, whatsapp groups to write to the database?

Question

PHP

Good day colleagues!
There is a group in Viber , Whatsapp where a lot of people (I am a member of it). The group represents customers and customers. I need to somehow programmatically receive message data for further processing and analytics. Who in the subject tell me where to dig.
The first thing that comes to mind is some kind of messenger data emulator from which you can then pull messages.
P / S The task is only to receive messages, there is no question of sending.

Answer 1

I came across this issue recently. For whatsapp there is go-whatsapp , works great.
There is nothing for Viber. At all.

Answer 2

https://habr.com/en/post/321246/
Viber has bots. Look this way