ScannerTestTableViewController.swift

//
//  ScannerTestTableViewController.swift
//  incidents4
//
//  Created by chag0709 on 18.07.18.
//  Copyright © 2018 SAP. All rights reserved.
//

import UIKit
import SAPFiori

class ScannerTestTableViewController: UITableViewController, UISearchResultsUpdating {

    var searchController: FUISearchController?
    var scannedBarcodes: [String] = ["Test QR Code", "103050"]
    var filteredBarcodes: [String] = []
    var isFiltered: Bool = false

    override func viewDidLoad() {
        super.viewDidLoad()

        tableView.register(FUIObjectTableViewCell.self, forCellReuseIdentifier: "FUIObjectTableViewCell")

        searchController = FUISearchController(searchResultsController: nil)
        searchController!.searchResultsUpdater = self
        searchController!.searchBar.placeholderText = "Search The List"

        searchController!.searchBar.isBarcodeScannerEnabled = true
        searchController!.searchBar.barcodeScanner?.scanResultTransformer = { (scanString) -> String in
            self.scannedBarcodes.append(scanString)
            return scanString
        }

        tableView.tableHeaderView = searchController?.searchBar
    }

    override func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return isFiltered ? self.filteredBarcodes.count : self.scannedBarcodes.count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "FUIObjectTableViewCell", for: indexPath)
        guard let objectCell = cell as? FUIObjectTableViewCell else {
            return cell
        }
        objectCell.headlineText = isFiltered ? filteredBarcodes[indexPath.row] : scannedBarcodes[indexPath.row]
        objectCell.statusText = String(indexPath.row)

        return objectCell
    }


    func updateSearchResults(for searchController: UISearchController) {
        guard let searchString = searchController.searchBar.text, !searchString.isEmpty else {
            self.isFiltered = false
            self.filteredBarcodes.removeAll()
            self.tableView.reloadData()
            return
        }

        self.isFiltered = true
        self.filteredBarcodes = scannedBarcodes.filter({
            return $0.localizedCaseInsensitiveContains(searchString)
        })
        self.tableView.reloadData()
    }

}