import SMART

// create the client
let smart = Client(
    baseURL: URL(string: "https://fhir-api-dstu2.smarthealthit.org")!,
    settings: [
        //"client_id": "my_mobile_app",       // if you have one
        "redirect": "smartapp://callback",    // must be registered
    ]
)

// authorize, then search for prescriptions
smart.authorize() { patient, error in
    if nil != error || nil == patient {
        // report error
    }
    else {
        MedicationOrder.search(["patient": patient!.id])
        .perform(smart.server) { bundle, error in
            if nil != error {
                // report error
            }
            else {
                var meds = bundle?.entry?
                    .filter() { return $0.resource is MedicationOrder }
                    .map() { return $0.resource as! MedicationOrder }
                
                // now `meds` holds all the patient's orders (or is nil)
            }
        }
    }
}

class AppDelegate: UIResponder, UIApplicationDelegate {
    
    func application(_ app: UIApplication, open url: URL,
        options: [UIApplicationOpenURLOptionsKey: Any] = [:]) -> Bool {
        
        // "smart" is your SMART `Client` instance
        if smart.awaitingAuthCallback {
            return smart.didRedirect(to: url)
        }
        return false
    }
}