I'm able to get the first 20 playlists fairly easily in Swift.
func getPlaylists() {
//DispatchQueue.global(qos: .userInitiated).async {
let playListRequest = try! SPTPlaylistList.createRequestForGettingPlaylists(forUser: session.canonicalUsername, withAccessToken: session.accessToken)
Alamofire.request(playListRequest)
.response { response in
let list = try! SPTPlaylistList(from: response.data, with: response.response)
for playList in list.items {
if let playlist = playList as? SPTPartialPlaylist {
let currentPlaylist: PlaylistItem = PlaylistItem(playlistName: playlist.name, playlistURL: playlist.uri.absoluteString)
self.playlists.append(currentPlaylist)
}
}
self.tableView.reloadData()
}
So far - so good. But this (as per documentation only delivers the first 20 playlists.
How can I get more (all!) playlists by adding a loop that is nested by something like
while list.hasNextPage == true {
}
Refactoring the C-code was not successful
Thanks in advance!
You can't do it using a while loop, because the network calls are asynchronous. You can recursively request for the next page instead, and reload the table every time a page returns in the completion handler.
Assuming you have the following property
var playlists = [SPTPartialPlaylist]()
In your getPlaylists function, you could have something like this (the way you have it using Alamofire also works fine):
SPTPlaylistList.playlists(forUser: session.canonicalUsername, withAccessToken: session.accessToken, callback: { (error, response) in
self.activityIndicator.stopAnimating()
if let listPage = response as? SPTPlaylistList, let playlists = listPage.items as? [SPTPartialPlaylist] {
self.playlists = playlists // or however you want to parse these
self.tableView.reloadData()
if listPage.hasNextPage {
self.getNextPlaylistPage(currentPage: listPage)
}
}
})
Where getNextPlaylistPage looks something like this:
func getNextPlaylistPage(currentPage: SPTListPage) {
currentPage.requestNextPage(withAccessToken: AppDelegate.shared().auth?.session.accessToken, callback: { (error, response) in
if let page = response as? SPTListPage, let playlists = page.items as? [SPTPartialPlaylist] {
self.playlists.append(contentsOf: playlists) // or parse these beforehand, if you need/want to
self.tableView.reloadData()
if page.hasNextPage {
self.getNextPlaylistPage(currentPage: page)
}
}
})
}
If you wanted to do this more in keeping with the method you have in your question, you could build getNextPlaylistPage using a combination of Alamofire and SPTListPage's createRequestForNextPageWithAccessToken function.
(Note that SPTPlaylistList is a subclass of SPTListPage.)
It's also been a few months since I updated my SpotifyMetadata framework, so some of the above may have changed slightly...but the general concept remains the same.
