MyRESTClient2.swift

import Foundation
import Alamofire

struct MyRESTClient {

    let url: NSURL
    let manager: Manager

    init(url: NSURL, manager: Manager?) {
        self.url = url
        if let _ = manager {
            self.manager = manager!
        } else {
            self.manager = Manager()
        }
    }

    func getAvailableItems(completion: ((items: [MyItem]?) -> ())) {
        self.manager.request(.GET, url.absoluteString + "/items", parameters: nil)
            .validate(statusCode: 200..<300)
            .validate(contentType: ["application/json"])
            .responseJSON { response in
                if let JSON = response.result.value as? [String : AnyObject],
                    items = JSON["items"] as? [String] {
                        var returnArray = [MyItem]()
                        for item in items {
                            returnArray.append(MyItem(name: item))
                        }
                        completion(items: returnArray)
                } else {
                    completion(items: nil)
                }
        }
    }

}