FilterVC for one section in swift

//  Created by Akash Soni on 02/12/19.


import UIKit

class FilterViewController: UIViewController,UITableViewDataSource,UITableViewDelegate {
    static var isFilterApplied = false
    static var appliedCellArray = [Bool]()
    static var checkedCellArray = [Bool]()
    static var titleArray = [String]()
    @IBOutlet weak var tableview: UITableView!
    override func viewDidLoad() {
        super.viewDidLoad()
        tableview.delegate = self
        tableview.dataSource = self
        let applyButton = UIButton(type: .system)
        applyButton.frame = CGRect(x: 0, y: 0, width: 30, height: 30)
        applyButton.setTitle("Apply", for: .normal)
        applyButton.addTarget(self, action: #selector(applyTapped), for: .touchUpInside)
        navigationItem.rightBarButtonItem = UIBarButtonItem(customView: applyButton)
        
        let cancelButton = UIButton(type: .system)
        cancelButton.frame = CGRect(x: 0, y: 0, width: 30, height: 30)
        cancelButton.setTitle("Cancel", for: .normal)
        cancelButton.addTarget(self, action: #selector(cancelTapped), for: .touchUpInside)
        navigationItem.leftBarButtonItem = UIBarButtonItem(customView: cancelButton)
        navigationItem.title = "Filter"
        //viewcontroller navigation bar setup end
        
        

        let headerView = UIView(frame: CGRect(x: 0, y: 0, width: self.view.frame.width, height: 30))
        let resetButton = UIButton(type: .system)
        resetButton.frame = CGRect(x: (headerView.frame.width - 240) / 2, y: (headerView.frame.height - 30) / 2,width: 240,height: 30);
        resetButton.setTitle("Reset", for: .normal)
        resetButton.setTitleColor(UIColor.red, for: .normal)
        let border = CALayer()
        border.backgroundColor = UIColor.lightGray.cgColor
        border.frame = CGRect(x: 0, y: headerView.frame.size.height-1, width: headerView.frame.size.width, height: 0.5)
        headerView.layer.addSublayer(border)
        resetButton.addTarget(self, action: #selector(resetButtonTapped), for: .touchUpInside)
        headerView.addSubview(resetButton)
        tableview.tableHeaderView = headerView;
        tableview.tableFooterView = UIView()
    }
    override func viewWillAppear(_ animated: Bool) {
        if !(FilterViewController.isFilterApplied)
        {
            for i in 0..<FilterViewController.checkedCellArray.count{
                    FilterViewController.checkedCellArray[i] = false
                    FilterViewController.appliedCellArray[i] = false
            }
            tableview.reloadData()
        }
    }
    @objc func cancelTapped(_ sender: Any) {
        FilterViewController.checkedCellArray = FilterViewController.appliedCellArray
        if FilterViewController.appliedCellArray.contains(true)
        {
            FilterViewController.isFilterApplied = true
        }
        else
        {
            FilterViewController.isFilterApplied = false
        }
        self.dismiss(animated: true, completion: nil)
    }
    @objc func applyTapped(_ sender: Any) {
        FilterViewController.appliedCellArray = FilterViewController.checkedCellArray
        if FilterViewController.appliedCellArray.contains(true)
        {
            FilterViewController.isFilterApplied = true
        }
        else
        {
            FilterViewController.isFilterApplied = false
        }
        self.dismiss(animated: true, completion: nil)
    }
     func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return FilterViewController.titleArray.count
    }
     func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "HISAppointmentFilterTableViewCell")
        cell?.textLabel?.text =  FilterViewController.titleArray[indexPath.row]
        cell?.selectionStyle = .none
        var isTrue: Bool = false
        if FilterViewController.appliedCellArray.contains(true)
        {
            isTrue = true
        }
        if !isTrue || !(FilterViewController.isFilterApplied)
        {
            cell?.accessoryType = FilterViewController.checkedCellArray[indexPath.row] ? .checkmark : .none
        }
        else
        {
            cell?.accessoryType = FilterViewController.appliedCellArray[indexPath.row]  ? .checkmark : .none
        }
        return cell!
    }
     func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let cell = tableView.cellForRow(at: indexPath)
        FilterViewController.checkedCellArray[indexPath.row] = FilterViewController.checkedCellArray[indexPath.row] ? false : true
        if cell?.accessoryType == .checkmark{
            cell?.accessoryType = .none
        }else{
            cell?.accessoryType = .checkmark
        }
    }
    
    @objc func resetButtonTapped(){
        for i in 0..<FilterViewController.checkedCellArray.count{
            FilterViewController.checkedCellArray[i] = false
        }
        FilterViewController.isFilterApplied = false
        tableview.reloadData()
    }
}