ExampleForCodable.swift

//
//  Item.swift
//  todosy
//
//  Created by Stephen lee on 3/6/18.
//  Copyright © 2018 Stephen Lee. All rights reserved.
//
import Foundation

class Item: Codable {
    var title : String = ""
    var done : Bool = false
    
    init() {}
    
    init(title: String, done: Bool) {
        self.title = title
        self.done = done
    }
}

//
//  ViewController.swift
//  todosy
//
//  Created by Stephen lee on 3/3/18.
//  Copyright © 2018 Stephen Lee. All rights reserved.
//
import UIKit

class TodoListViewController: UITableViewController {
    
    var itemArray = [Item]()
    let defaults = UserDefaults.standard
    let dataFilePath = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first?.appendingPathComponent("Items.plist")
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        print(self.dataFilePath)
        itemArray.append(Item(title: "Find Mike", done: false))
        itemArray.append(Item(title: "Find Mike", done: false))
        itemArray.append(Item(title: "Find Mike", done: false))
        itemArray.append(Item(title: "Find Mike", done: false))
        itemArray.append(Item(title: "Find Mike", done: false))
        itemArray.append(Item(title: "Find Mike", done: false))
        itemArray.append(Item(title: "Find Mike", done: false))
        itemArray.append(Item(title: "Find Mike", done: false))
        itemArray.append(Item(title: "Find Mike", done: false))
        itemArray.append(Item(title: "Find Mike", done: false))
        itemArray.append(Item(title: "Find Mike", done: false))
        itemArray.append(Item(title: "Find Mike", done: false))
        itemArray.append(Item(title: "Find Mike", done: false))
        itemArray.append(Item(title: "Find Mike", done: false))
        // Do any additional setup after loading the view, typically from a nib.
//        if let items = defaults.array(forKey: "TodoListArray") as? [Item] {
//            itemArray = items
//        }
    }
    
    // Mark: tableView Datasource methods
    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return itemArray.count
    }
    
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        
        let cell = tableView.dequeueReusableCell(withIdentifier: "TodoItemCell", for: indexPath)
        let item = itemArray[indexPath.row]
        
        cell.textLabel?.text = item.title
        cell.accessoryType = item.done ? .checkmark : .none
        return cell
    }
    
    // Mark - TableView Delegate methods
    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        
        itemArray[indexPath.row].done = !itemArray[indexPath.row].done
        self.saveItems()
        self.tableView.reloadData()

        tableView.deselectRow(at: indexPath, animated: true)
    }
    
    // Mark - Add new items
    
    @IBAction func addButtonPressed(_ sender: UIBarButtonItem) {
        var textField = UITextField()
        let alert  = UIAlertController(title: "Add New Todosy Item", message: "", preferredStyle: .alert)
        let action = UIAlertAction(title: "Add Item", style: .default) { (action) in
            // TODO: what will happen when user clicks on the action button
            if (textField.text != nil) {
                let newItem = Item()
                newItem.title = textField.text!
                self.itemArray.append(newItem)
                
                self.saveItems()
//                self.defaults.set(self.itemArray, forKey: "TodoListArray")
                self.tableView.reloadData()
            }
        }
        
        alert.addTextField { (alertTextField) in
            alertTextField.placeholder = "Create new item"
            
            textField = alertTextField
        }
        alert.addAction(action)
        present(alert, animated: true, completion: nil)
    }
    
    func saveItems() {
        let encoder = PropertyListEncoder()
        do {
            let data  = try encoder.encode(itemArray)
            try data.write(to: dataFilePath!)
        } catch {
            print("Error encoding item array, \(error)")
        }
    }
    
    func loadItems() {
        if let data = try? Data(contentsOf: dataFilePath!) {
            let decoder = PropertyListDecoder()
            do {
                itemArray = try decoder.decode([Item].self, from: data)
            } catch {
                print("ERror decoding [Item]")
            }
        }
    }
}