Swift variable to choose struct - ios

Question

new approach to ask my question. I thought it was clear but apparently
not. :-D 2nd chance.
I use SWXMLhash to get information from websites. For each website i need a different struct, because the datastructure of each website is different.
I have a good working function (using 1 website as source) which i would like to transform to a general function depending on the chosen website.
The best solution i have got so far (see code below) got me a compile error on:
TorrentProviderItem = try xmlTorrent["rss"]["channel"]["item"].value()
compile error = Ambiguous reference to member 'subscript'
code of function:
private func setResultsToEqualData(result: String, Torrentprovider: TorrentProviders) {
var TorrentProviderItem: [XMLIndexerDeserializable]
var xmlTorrent: XMLIndexer!
xmlTorrent = SWXMLHash.parse(result)
switch Torrentprovider {
case .ExtraTorrent:
TorrentProviderItem = [ExtraTorrentItem]()
default:
TorrentProviderItem = [Torrentz2Item]()
}
do {
TorrentProviderItem = try xmlTorrent["rss"]["channel"]["item"].value()
} catch {
print("FOUT in torrent!!")
return
}
selectBestResult()
}
I have no clue how to fix this. Anyone else?
ps in the original function for 1 website i use:
var TorrentProviderItem: [ExtraTorrentItem]
and without the switch, that works fine.

Answer 1

Some showed me the options of a function within a struct. So i used this to build a workaround. I wrote a function in each struct for each website, the returning value of each function is of the same datatype.
For me it is a workaround and not the solution. I still have to add every website to the function (see below).
private func setResultsToEqualData(result: String, Torrentprovider: TorrentProviders) -> torrentProviderItem? {
var TorrentProviderItem = [torrentProviderItem]()
var xmlTorrent: XMLIndexer!
xmlTorrent = SWXMLHash.parse(result)
switch Torrentprovider {
case .ExtraTorrent:
var tempExtraTorrentItem: [ExtraTorrentItem]
do {
tempExtraTorrentItem = try xmlTorrent["rss"]["channel"]["item"].value()
for item in tempExtraTorrentItem {
TorrentProviderItem.append(item.result())
}
} catch {
print("FOUT in torrent!!")
return nil
}
case .Torrentz2:
var tempTorrentz2Item: [Torrentz2Item]
do {
tempTorrentz2Item = try xmlTorrent["rss"]["channel"]["item"].value()
for item in tempTorrentz2Item {
TorrentProviderItem.append(item.result())
}
} catch {
print("FOUT in torrent!!")
return nil
}
}
return (selectBestResult(results: TorrentProviderItem))
}
I think the solution to create a general function lay's within the Strucs. To use one struct for all websites in stead of a struct for each website. I just don't know how to do this. Jet.