subcribing on webhook: feed --- Two webhook event received by commenting to the profile picture post.

[sarrtle]

Introduction

When your app is subscribed to the feed webhook, you will receive notification when someone commented on your post, or you post something in your timeline, it will also notify you when they edit their comment or you edit your own post.

Problem

Facebook is sending a webhook data that symbolized something like a single photo post. According to the current build of the objects in fbtools, it is always a FeedNewPostWithPhoto, and marked as verb:edited, means it is sending a signal that the post is edited even there are no changes aside from the link, from_ alias="from": from_.name and from_.id.

link: it changes but still the same profile picture image
from.name: the name of the commenter, can be the page or the users
from.id: the id of the commenter, can be the the page or the user

And there is no other way around how to know if this edited event is a profile picture post or not, even as their docs says item supposed to have profile on it, but it shows item:photo that has same model structure of FeedNewPostWithPhoto.

And I don't know why they need to send a webhook event of an edited verb on profile picture post when someone commented on it.

Solution

Current solution is to put this on cache and exclude the link, from.id and from.name data. But the catch is, first time run of the listener may double the webhook event if someone commented on the profile picture while the app subscribed to the feed webhook, but the app of the user who will use fbtools will handle that easily to see if the changes have some differences than the current data they have if they want to apply the changes of the post whatever their algorithm may be why they want to receive notification when the page edited their posts.