cloudkit-swift-3-error.swift

import Foundation
import CloudKit

public enum CloudKitError: Error {
    case general(String)
}

public enum CloudKitResult<T, ResultError: Error> {
    case success(T)
    case failure(ResultError)
}

public typealias CloudKitFetchClosure<T> = (_ result: CloudKitResult<T, CloudKitError>) -> Void

public final class CloudKitController {

  public typealias T = CKRecord
  
      public func save(_ record: CKRecord, callback: CloudKitFetchClosure<T>) -> Void {
        
        self.publicDB.save(record, completionHandler: {updatedRecord, error in

            if let _: Error = error {

                DispatchQueue.main.async(execute: {
                    callback(.failure(.general("Something went wrong")))
                })

            } else {

                DispatchQueue.main.async(execute: {
                    callback(.success(updatedRecord))
                })
            }
        })
    }
}