Getting Resources Scheme

import UIKit
 
class ViewController: UIViewController {
 
    // Determine output variables
    @IBOutlet weak var resultTextView: UITextView!
    @IBOutlet weak var loadResourcesButton: UIButton!
 
    // Redetermine method
    override func viewDidLoad() {
        super.viewDidLoad()
        self.deactivateButtons()
        self.initializeFramework()
        self.auth {
            self.activateButtons()
            self.resultTextView.text = "Authentication success"
        }
    }
 
    // Set method that will be executed on button click
    @IBAction func loadResourcesPressed(_ sender: UIButton) {
        let databaseName = "database.sqlite"
        if self.openDatabase(databaseName) {
            self.loadResourcesScheme(databaseName) { (jsonResult) in
                self.resultTextView.text = String(format: "%@", jsonResult)
            }
        }
    }
 
    // Initialize framework
    private func initializeFramework() {
        let apiVersion: String = "v1"
        let host: String = "http://testmasterfmp.fsight.cloud/"
        let environment: String = "Leonid_environment"
        let project: String = "Leonid_project"
        let device: String = (UIDevice.current.identifierForVendor?.uuidString)!
        HHFWController.sharedInstance().initWithCredentials(
            apiVersion,
            host: host,
            environment: environment,
            project: project,
            device: device
        )
    }
 
    // Authenticate
    private func auth(completion: @escaping ()->()) {
        let username: String = "Leonid"
        let password: String = "123123"
        HHFWController.sharedInstance().auth(username, password: password){ (jsonResult) in
            if let jsonDict = jsonResult as? NSDictionary,
                let status = jsonDict["status"] as? String, status == "ok" {
                print("Auth success")
                completion()
            } else {
                print("Auth error")
            }
        }
    }
 
    // Open or create a database
    private func openDatabase(_ databaseName: String) -> Bool {
        let fullDatabaseURL = self.getURL(for: databaseName)
        return HHFWController.sharedInstance().openBase(fullDatabaseURL.path, key: "")
    }
 
    // Load resources scheme
    private func loadResourcesScheme(_ databaseName: String, completion: @escaping (NSDictionary)->()) {
        HHFWController.sharedInstance().resources(databaseName) { (jsonResult) in
            if let jsonDict = jsonResult as? NSDictionary,
                let status = jsonDict["status"] as? String, status == "ok" {
                print("Load resources success")
                completion(jsonDict)
            } else {
                print("Load resources error")
            }
        }
    }
 
    // Call auxiliary classes
    private func getURL(for fileName: String) -> URL {
        let paths: [URL] = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
        let fileURL: URL = paths[0].appendingPathComponent(fileName)
        return fileURL
    }
 
    // Set methods to display application user interface elements
    private func deactivateButtons() {
        self.loadResourcesButton.isEnabled = false
    }
 
    private func activateButtons() {
        self.loadResourcesButton.isEnabled = true
    }
}