How can i show images to limited users in flutter - firebase

Question

I want to show my post to my followers only how can I implement that here is my code.
here is the structure of my user collection
here is the collection of posts by user
final model.User userProvider = Provider.of<UserProvider>(context).getUser;
StreamBuilder(
stream: FirebaseFirestore.instance
.collection(post_collection)
.orderBy("datePublished",
descending:
true)
.snapshots(),
builder: (context,
AsyncSnapshot<QuerySnapshot<Map<String, dynamic>>> snapshot) {
return ListView.builder(
physics: const BouncingScrollPhysics(),
itemCount: snapshot.data.docs.length,
itemBuilder: (context, index) =>
PostCard(snap: snapshot.data.docs[index].data()));
}),

Answer 1

My logic to approach this problem would be:
If I am a user, I should be able to see the post of people I follow, so the source of posts that are visible to me would arrive only from the list of people I follow. Create this list as an attribute of users in their database record. Every time the user follows someone, that someone is added to this list.
So if you want your posts to be seen only by your followers, as soon as someone follows you, your account would be added to the list of people they follow. Thus your account becomes just another source of accounts from which that particular follower receives post updates from.
You could implement the logic to receive posts only from the list of people a particular user follows. This way only your followers will be able to see your posts.