Parsing GraphQL failure() result in Swift - ios

Question

I am relatively new to Swift and am having trouble parsing the result of a GraphQL API call.
I see the result within the 'failure()' declaration is of the type NSError and I'm basically trying to access it if it is a 'failure' and then access the NSError keys. The result is:
failure(Error Domain=NSURLErrorDomain Code=-1005 "The network connection was lost." UserInfo={NSUnderlyingError=0x282232700 {Error Domain=kCFErrorDomainCFNetwork Code=-1005 "(null)" UserInfo={NSErrorPeerAddressKey=<CFData 0x280e54b40 [0x1faa4fcf0]>{length = 16, capacity = 16, bytes = 0x1002005036d7fb9f0000000000000000}, _kCFStreamErrorCodeKey=-4, _kCFStreamErrorDomainKey=4}}, NSErrorFailingURLStringKey=http://staging.mysite.com/api/, NSErrorFailingURLKey=http://staging.mysite.com/api/v2/, _kCFStreamErrorDomainKey=4, _kCFStreamErrorCodeKey=-4, NSLocalizedDescription=The network connection was lost.})
I get the below information by using:
print("\(result)")
Result is an object of type Result<GraphQLResult<Data>, Error>. There are methods to get errors but this result apparently isn't thrown as a GraphQL Error. The error catch I'm using is:
if let firstError = try? result.get().errors?.first {
completion([], [], firstError)
return
}
It passes this check so it is just interpreting it as a normal data result. My question is how do I parse this information?
My thinking is that I need to check if it is a failure, then unwrap it from the 'failure' type and then can treat the enclosed info as an NSError object. I can't use 'contains' since it's not a String. There is a get() method on result that allows you to result.get().data or result.get().error but neither return anything in this case.
Any help on how I can parse this information would be greatly appreciated. Thanks!

Answer 1

Result is a generic swift enumeration, which has two states: success or failure.
To get the error from the failure one must use a switch statement, for eg:
switch result {
case .failure(let error):
//Handle error here
default:
break
}
More on the Result enumeration here: https://developer.apple.com/documentation/swift/result.