func fetchOrCreateShare()

in Sharing/ViewModels/ViewModel.swift [161:189]
26 lines of code
4 McCabe index (conditional complexity)

    func fetchOrCreateShare(contact: Contact, completionHandler: @escaping (Result<(CKShare, CKContainer), Error>) -> Void) {
        guard let existingShare = contact.associatedRecord.share else {
            let share = CKShare(rootRecord: contact.associatedRecord)
            share[CKShare.SystemFieldKey.title] = "Contact: \(contact.name)"

            let operation = CKModifyRecordsOperation(recordsToSave: [contact.associatedRecord, share])
            operation.modifyRecordsCompletionBlock = { (savedRecords, deletedRecordIDs, error) in
                if let error = error {
                    completionHandler(.failure(error))
                    debugPrint("Error saving CKShare: \(error)")
                } else {
                    completionHandler(.success((share, self.container)))
                }
            }

            database.add(operation)
            return
        }

        database.fetch(withRecordID: existingShare.recordID) { (share, error) in
            if let error = error {
                completionHandler(.failure(error))
            } else if let share = share as? CKShare {
                completionHandler(.success((share, self.container)))
            } else {
                completionHandler(.failure(ViewModelError.invalidRemoteShare))
            }
        }
    }