deep-linking-sample/Apps/Wikipedia/WMF Framework/NSManagedObjectContext+NavigationState.swift

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Swift
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import CoreData
public extension NSManagedObjectContext {
var navigationState: NavigationState? {
get {
let keyValue = wmf_keyValue(forKey: NavigationState.libraryKey)
guard let value = keyValue?.value as? Data else {
return nil
}
let decoder = PropertyListDecoder()
guard let navigationState = try? decoder.decode(NavigationState.self, from: value) else {
return nil
}
return navigationState
}
set {
let encoder = PropertyListEncoder()
let value = try? encoder.encode(newValue) as NSData
wmf_setValue(value, forKey: NavigationState.libraryKey)
}
}
@objc(wmf_openArticleURL)
var openArticleURL: URL? {
guard let key = navigationState?.viewControllers.last(where: { (vc) -> Bool in
return vc.info?.articleKey != nil
})?.info?.articleKey else {
return nil
}
return URL(string: key)
}
}