CODEWITHSUNDEEP
fluttergoogle-cloud-firestorecount
Hee
Hee

Reputation: 187

flutter-firestore: how to total unread messages for badge count

I'd like to show the number of unread messages on chat icon in a page of my flutter-firestore app. For that, I save unread message docIds inside each chatRoomId. I can count each number for each chatRoomId respectively, but can't count all number for all chatRoomIds to show total number of unread messages of a user like in above picture. The following is my firestore structure. For example, as you see in the screenshot, if I want to count all docIds and create 3 in a red circle on the chat badge, how can I do that in code?

enter image description here

Here is what I can do so far to create that badge count.

int _getUnseenMessagesNumber(List<Map<String, dynamic>> items) {
int counter = 0;
for (final item in items) {
  counter += item.values.first.length;
}
return counter;

}

body: StreamBuilder<DocumentSnapshot>(
              stream: FirebaseFirestore.instance
                  .collection('crews')
                  .doc(uid)
                  .snapshots(),
              builder: (context, snapshot) {
                int number = _getUnseenMessagesNumber(
                            snapshot.data['chatRoomIds']);
                if (snapshot.data['chatRoomIds'].isNotEmpty) {
                  return Stack(children: [
                    Container(
                       decoration: BoxDecoration(
                          shape: BoxShape.circle, color: Colors.red),
                      child: Center(
                        child: Text(
                          number.toString()
                      ),
                    ),
                  ]);
                } else {
                  return container();
                }
              }),

Upvotes: 1

Views: 2073

Answers (1)

Arnaud Delubac
Arnaud Delubac

Reputation: 839

ok then if you changed the structure of your document so that the unseen messages are in a list of Map, then should be able to extract the number of unseen messages with some function like this:

int _getUnseenMessagesNumber(List<Map<String, dynamic>> items){
 int counter = 0;
 for(final item in test) {
    counter+=item.values.first.length;
 }
 return counter;
 }

I hope it helped

Upvotes: 1

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