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ankurg22/MessagesRepository.kt Secret

Last active January 19, 2022 06:52
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MessagesRepository.kt
// To observe new records being added.
firestoreDb.collection(collectionPath)
.orderBy("created_at", Direction.ASCENDING)
.startAfter(currentTimestamp)
.addSnapshotListener(...)
// To observe last N records
firestoreDb.collection(collectionPath)
.orderBy("created_at", Direction.ASCENDING)
.endBefore(currentTimestamp)
.limitToLast(10) // N = 10
.addSnapshotListener(...)
// To observe last N to 2N records
firestoreDb.collection(collectionPath)
.orderBy("created_at", Direction.ASCENDING)
.endBefore(lastRecordTimestamp)
.limitToLast(10) // N = 10
.addSnapshotListener(...)
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