getBrews.swift

//
//  ViewController.swift
//  Brews
//
//  Created by Jabari Bell on 8/28/16.
//  Copyright © 2016 codemitten. All rights reserved.
//

import UIKit
import Alamofire
import SwiftyJSON


class ViewController: UIViewController {
    
    //MARK: Property
    let tableView = UITableView(frame: .zero)
    let CellIdentifier = "LOL"
    var beers = [Beer]()

    
    //MARK: Method
    override func viewDidLoad() {
        super.viewDidLoad()
        setupTableView()
    }
    
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        fetchBeers { beers in
            self.beers = beers
            dispatch_async(dispatch_get_main_queue(),{
                self.tableView.reloadData()
            })
        }
    }
    
    private func setupTableView() {
        view.addSubview(tableView)
        tableView.dataSource = self
        tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: CellIdentifier)
    }

    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        tableView.frame = view.bounds
    }
}


//MARK: UITableViewDataSource
extension ViewController: UITableViewDataSource {
    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return beers.count
    }
    
    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier(CellIdentifier, forIndexPath: indexPath)
        cell.textLabel?.text = beers[indexPath.row].name
        return cell
    }
}


//MARK: Network/Data Layer
extension ViewController {
    private func fetchBeers(onCompletion: ([Beer] -> Void)) {
        var internalBrews = [Beer]()
        let url = "http://api.brewerydb.com/v2/menu/styles?key=42473b9531e8ae8aba74622ef4fab78b&format=json"
        Alamofire.request(.GET, url).responseJSON { response in
            guard let value = response.result.value else { return }
            let json = JSON(value)
            for (_, obj) in json["data"] {
               internalBrews.append(Beer(name: obj["name"].stringValue))
            }
            onCompletion(internalBrews)
        }
    }
    
}

//MARK: Beer model - add more properties
struct Beer {
    let name: String
}