gistfile1.txt

//
//  DrawerViewController.swift
//  GPS Info
//
//  Created by Chashmeet Singh on 16/03/18.
//  Copyright © 2018 Chashmeet Singh. All rights reserved.
//

import UIKit
import KYDrawerController
import CoreData

class DrawerViewController: UICollectionViewController, UICollectionViewDelegateFlowLayout {
    
    let draweritems = ["Logout"]
    let drawerIcons = ["ic_arrow_back"]
    private let cellId = "cellId"
    private let headerViewId = "headerViewId"
    var appDelegate: AppDelegate?
    var menuButton: UIButton?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        setupView()
        appDelegate = UIApplication.shared.delegate as? AppDelegate
    }
    
    func setupView() {        
        collectionView?.backgroundColor = UIColor.white
        collectionView?.alwaysBounceVertical = true
        
        collectionView?.register(DrawerCollectionViewCell.self, forCellWithReuseIdentifier: cellId)
        collectionView?.register(HeaderCollectionReusableView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: headerViewId)
    }
    
    override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return draweritems.count
    }
    
    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath as IndexPath) as! DrawerCollectionViewCell
        
        let text = draweritems[indexPath.row]
        cell.backgroundColor = .white
        let imageName = drawerIcons[indexPath.row]
        cell.label.text = text
        cell.imageView.image = UIImage(named: imageName)?.withRenderingMode(.alwaysTemplate)
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: collectionView.frame.width, height: 36)
    }
    
    override func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
        
        let headerView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: headerViewId, for: indexPath) as! HeaderCollectionReusableView
        headerView.usernameLabel.text = Client.sharedInstance.user!.username
        return headerView
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
        return CGSize(width: collectionView.frame.width, height: 120)
    }
    
    override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        switch (indexPath.row) {
        case self.draweritems.index(of: "Logout")!:
            logout()
            break
        default:
            break
        }
    }
    
    func logout() {
        let alertController = UIAlertController(title: "Are you sure?", message: nil, preferredStyle: .alert)
        let logoutAction = UIAlertAction(title: NSLocalizedString("Logout", comment: ""), style: .default, handler: { (pAlert) in
            Client.sharedInstance.logout()
            self.deleteSOSAlerts()
            self.dismiss(animated: true, completion: nil)
        })
        let cancelAction = UIAlertAction(title: NSLocalizedString("Cancel", comment: ""), style: .default, handler: { (pAlert) in
            //
        })
        alertController.addAction(cancelAction)
        alertController.addAction(logoutAction)
        self.present(alertController, animated: true, completion: nil)
    }
    
    @objc func openDrawer() {
        if let drawerController = parent as? KYDrawerController {
            drawerController.setDrawerState(.closed, animated: true)
        }
    }
    
    func deleteSOSAlerts() {
        
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        let context = appDelegate.persistentContainer.viewContext
        
        let request = NSFetchRequest<NSFetchRequestResult>(entityName: "SOSAlert")
        do {
            let result = try context.fetch(request)
            //alerts = (result as! [NSManagedObject])
            for alert in result as! [NSManagedObject] {
                context.delete(alert)
            }
            
            try context.save()
        } catch {
            print("Failed")
        }
    }
    
}