Why is my Facebook AppInviteDialog request not being received by target friend?

Question

In short: Everything seems to be working on the client side, but nothing received for the Facebook target friend.

These are the detailed steps with code and screensh

Answer 1

Ok, turns out everything was working fine after all. My mistake was in assuming not having the app installed, and not having the app authorized should generate a push notification.

After creating a new test user, using a device where the app was not currently installed and the app NEVER having been authorized with the user.

So the key here is that no push notification will be generated if the app is installed on the target device, even if the user has not authorized the app previously. Also, seemingly, if the user has authorized the app previously, even if it was removed it at some point, it also will not generate a notification.

So if you want to test this, create an entirely new test user and log in on the Facebook app on the platform you are testing on, and make sure the app is not installed on the device.

I think it should still generate a notification despite app being installed, because multiple users might be using the same device, but that's how it seems to be right now.

I'll leave this here in case anyone has a similar problem in the future.

Live long and prosper!