svw with scanner

StartViewController.swift

//
//  StartViewController.swift
//  incidents4
//
//  Created by chag0709 on 17.07.18.
//  Copyright © 2018 SAP. All rights reserved.
//

import UIKit
import ReSwift
import SAPFiori
import SAPOData
import SAPFoundation
import SAPCommon

class StartViewController: UIViewController, StoreSubscriber, FUIBarcodeScanViewControllerDelegate {

    // ? https://github.com/Goktug/Redux-Twitter/blob/a324e7f160658e420c3b9e416639ffad4769dc40/Redux-Twitter/Scenes/Search/SearchViewController.swift#L19
    typealias StoreSubscriberStateType = AppState

    private let appDelegate = UIApplication.shared.delegate as! AppDelegate
    private var zfmobincidentsrvEntities: ZFMOBINCIDENTSRVEntities<OnlineODataProvider> {
        return self.appDelegate.zfmobincidentsrvEntities
    }
    private let logger: Logger = Logger.shared(named: "StartViewController")

    private var scanViewController: FUIBarcodeScanViewController?

    @IBOutlet weak var requestStoresButton: UIButton!
    @IBOutlet weak var statusLabel: UILabel!
    @IBOutlet weak var startScanView: UIButton!


    override func viewDidLoad() {
        super.viewDidLoad()
        
        scanViewController = FUIBarcodeScanViewController.createInstanceFromStoryboard()
        guard var safeScanViewController = scanViewController else {
            return
        }
        safeScanViewController.barcodeScanner.scanMode = .qr
        safeScanViewController.barcodeScanner.indicatorBorderColor = UIColor.red.cgColor
        safeScanViewController.barcodeScanner.indicatorBorderWidth = 20
        safeScanViewController.barcodeScanner.promptMessage = "Scan A QR Code"
        safeScanViewController.barcodeScanner.scanResultTransformer = { s in
            return "transformed"
        }
        safeScanViewController.delegate = self

        self.startScanView.addTarget(nil, action: #selector(showScanView), for: .touchUpInside)
    }

    @objc func showScanView() {
        guard let safeScanViewController = scanViewController else {
            return
        }
        let navController = UINavigationController(rootViewController: safeScanViewController)
        self.navigationController?.present(navController, animated: true, completion: nil)
    }

    func barcodeScanViewController(_ barcodeScanViewController: FUIBarcodeScanViewController, didReceiveScanResult scanResult: FUIBarcodeScanResult?) {
        print("scan result: \(String(describing: scanResult?.scanResultString))")
        if scanResult?.scanResultString != "success" {
            print("mongo qr, invalid")
        } else {
            barcodeScanViewController.dismiss(animated: true, completion: nil)
        }
    }

    override func viewWillAppear(_ animated: Bool) {
        store.subscribe(self)
        requestStoresButton.addTarget(nil, action: #selector(requestStoresAction), for: .touchUpInside)
    }

    override func viewWillDisappear(_ animated: Bool) {
        store.unsubscribe(self)
    }

    func newState(state: AppState) {
        DispatchQueue.main.async {
            self.statusLabel.text = "API: \(state.apiStores?.count ?? 0) Stores\nODATA: \(state.odataStores?.count ?? 0) Stores\nMapped: \(state.locations?.count ?? 0) Stores"
        }

    }

    // TODO: Use Promise, Future, better Callbacks, etc to load both API at the same time, and process Mapping when both are done
    @objc func requestStoresAction() {
        let query = DataQuery()
            .from(ZFMOBINCIDENTSRVEntitiesMetadata.EntitySets.storeSet)
            .selectAll()
            .top(50)

        let url = URL(string: "https://api.kaufland.net/stores/api/v1/")
        let task = URLSession.shared.apiStoreTask(with: url!) { apiStores, response, error in
            if let apiStores = apiStores {
                store.dispatch(UpdateAPIStores(apiStores: apiStores))
                self.zfmobincidentsrvEntities.fetchStoreSet(matching: query) { storeSet, error in
                    guard let storeSet = storeSet else {
                        print("Fetch failed somehow")
                        return
                    }
                    store.dispatch(UpdateODATAStores(odataStores: storeSet))
                    LocationMappingUtil().mapLocations()
                }
            } else {
                // TODO: Add logging
            }
        }
        task.resume()
    }

}