if you want FREE whatsapp notifications using callmebot api, below are the code that is widely available.
You can customize it anyway you like, you can make it to send notification to SuperAdmin, StoreOwner, StoreManager, and DeliveryGuy. Enable/disable each role at will, anything you can think of except for cleaning your kitchen. Callmebot is well-known for its clumsiness to clean kitchen LOL!
When I said StoreManager, I mean If StoreOwner X have 3 stores, then Owner can not be in that 3 stores at the same time to take orders, this is where StoreManager comes in. The StoreOwner can still get notification if orders made from those 3 restaurant if Owner chose to enable it.
Same Rule applies to SuperAdmin, he can choose to receive notifications when new orders came from ALL restaurants.
Now, if you want to send notification to DeliveryGuy, just put the code after restaurant accept the new order, not in ordercontroller.
I laid the concept, I laid a working main function, you do the rest if you want it FREE.
If you valued your time more and you want it done right, you can PM me.
I promise you, no running around setting all over the place just to add 1 user to receive notification.
Just 1 setting to add a user. Total ONLY 2 settings for the whatsapp notifications.
I PROMISE SIMPLICITY for a COMPLEX FEATURE.