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class FavoritesManager {
    
    static let sharedInstance = FavoritesManager()
    
    let userDefaults = NSUserDefaults.standardUserDefaults()
    
    let productsKey = "com.detroitlabs.shopfast.favorites"
    
    private var products : [Product] = []
    

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    func markPurchasedAtIndex(index: Int) {
        self.products[index].purchased = true
        
        self.saveProductsToDefaults()
    }

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class Product : NSObject, NSCoding {
    
    let nameKey = "name"
    let qtyKey = "qty"
    let purchasedKey = "purchased"
    
    var name : String = ""
    var qty : Int = 0
    var purchased : Bool = false
    

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    func swipeableTableViewCell(cell: SWTableViewCell!, didTriggerLeftUtilityButtonWithIndex index: Int) {
        switch index {
        case LeftUtilityButtons.Favorite.rawValue:
            if let indexPath = self.shoppingListTableView.indexPathForCell(cell) as NSIndexPath! {
                // TODO: Add Favorites functionality here
            }
        case LeftUtilityButtons.Purchase.rawValue:
            if let indexPath = self.shoppingListTableView.indexPathForCell(cell) as NSIndexPath! {
                self.shoppingListManager.markPurchasedAtIndex(indexPath.row)
            }

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    func swipeableTableViewCell(cell: SWTableViewCell!, didTriggerRightUtilityButtonWithIndex index: Int) {
        switch index {
        case RightUtilityButtons.Delete.rawValue:
            if let indexPath = self.shoppingListTableView.indexPathForCell(cell) as NSIndexPath! {
                self.shoppingListTableView.beginUpdates()
                self.shoppingListTableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Bottom)
                self.shoppingListManager.removeProductAtIndex(indexPath.row)
                self.shoppingListTableView.endUpdates()
            }
        default:

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    // MARK: ReorderTableView Delegate Methods
    
    func saveObjectAndInsertBlankRowAtIndexPath(indexPath: NSIndexPath!) -> AnyObject! {
        let p = self.shoppingListManager.productAtIndex(indexPath.row)
        self.shoppingListManager.replaceProductAtIndex(indexPath.row, withProduct: Product(name: "", qty: 0))
        return p
    }
    
    func moveRowAtIndexPath(fromIndexPath: NSIndexPath!, toIndexPath: NSIndexPath!) {
        let p = self.shoppingListManager.productAtIndex(fromIndexPath.row)

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    enum LeftUtilityButtons: Int {
        case Purchase
        case Favorite
    }
    
    enum RightUtilityButtons: Int {
        case Delete
    }
    
    // MARK: SWTableViewCell Delegate Methods

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    // MARK: TableViewDataSource Delegate Methods
    
    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        if let cell = tableView.dequeueReusableCellWithIdentifier("Product Cell") as? ProductCell {
            cell.productNameLabel.text  = self.shoppingListManager.productAtIndex(indexPath.row).name
            
            // Set up SWTableViewCell utility buttons
            cell.delegate = self
            cell.leftUtilityButtons = self.leftButtons()

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    // Allow just one cell's utility button to be open at once
    func swipeableTableViewCellShouldHideUtilityButtonsOnSwipe(cell: SWTableViewCell!) -> Bool {
        return true
    }
    
    // Determines which swipe directions are allowed per cell
    func swipeableTableViewCell(cell: SWTableViewCell!, canSwipeToState state: SWCellState) -> Bool {
        switch state {
        case SWCellState.CellStateLeft:

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import UIKit
import SWTableViewCell

class ProductCell : SWTableViewCell {
    
    @IBOutlet weak var productNameLabel: UILabel!
    
}