Moving my question from StackOverflow from here (as I didn’t get much response there).
I am using Sendbird for chat messages in an native iOS app. They have an add-on SyncManager. Which caches the channel list and messages locally on the phone for offline support.
I am trying to paginate the channel list using SyncManager’s collection. Here is my code snippet:
func fetchCollection() {
self.query = SBDGroupChannel.createMyGroupChannelListQuery()
self.query?.order = .latestLastMessage
self.query?.limit = 20
self.collection = SBSMChannelCollection(query: query)
self.collection?.delegate = self
}
func fetchNextPage() {
// Problem: The `query.hasNext` is never set to `false`!
guard let query = query, query.hasNext else { return }
collection?.fetch { error in
if let error = error {
self.log("Error: \(error)", level: .debug)
return
}
// Do nothing, as the collection delegate would be notified to the delegate.
}
}
func collection(_ collection: SBSMChannelCollection, didReceiveEvent action: SBSMChannelEventAction, channels: [SBDGroupChannel]) {
switch action {
case .insert:
datasource.insertChannels(channels)
case .update:
datasource.moveChannels(channels)
case .remove:
datasource.deleteChannels(channels)
case .move:
datasource.moveChannels(channels)
case .clear:
datasource.clearChannels()
case .none:
DispatchQueue.main.async { [weak self] in
self?.tableView.reloadData()
}
default:
assertionFailure("Undefine action")
DispatchQueue.main.async { [weak self] in
self?.tableView.reloadData()
}
}
}
The problem is the query.hasNext is never set to false. I have tried checking collection.query.hasNext as well, but that too has true always.
Note that Sendbird’s basic SDK does set the query.hasNext to false and hence I can determine whether or not the query has next page and I should make another call. I want to paginate using the SyncManager.
Their sample app for SyncManager sends the next page request without checking if there is a next page available, so every time the user scrolls to bottom, they are calling the API. Am I missing anything here?
