IGNNetworking.swift

//
//  IGNNetworking.swift
//  Unofficial Metacritic
//
//  Created by Jordan Morgan on 8/22/16.
//  Copyright © 2016 Dreaming In Binary, LLC. All rights reserved.
//

import Foundation

class IGNNetworking : Networking
{
    private static let apiKey = "redacted"
    private static let apiURLTop =  "https://newsapi.org/v1/articles?source=ign&sortBy=top&apiKey=" + IGNNetworking.apiKey
    private static let apiURLLatest =  "https://newsapi.org/v1/articles?source=ign&sortBy=latest&apiKey=" + IGNNetworking.apiKey
    private static let topArticlesURL = NSURL(string: IGNNetworking.apiURLTop)!
    private static let latestArticlesURL = NSURL(string: IGNNetworking.apiURLLatest)!
    
    //MARK: Networking Calls
    func getTopArticles(completion:([IGNArticleStub]?, NetworkError?) -> ())
    {
        GET(with: IGNNetworking.topArticlesURL) { info, error in
            self.handleArticleResponse(info, error: error, completion: completion)
        }
    }
    
    func getLatestArticles(completion:([IGNArticleStub]?, NetworkError?) -> ())
    {
        GET(with: IGNNetworking.latestArticlesURL) { info, error in
            self.handleArticleResponse(info, error: error, completion: completion)
        }
    }
    
    //MARK: Helpers
    private func handleArticleResponse(info:NSDictionary?, error:NetworkError?, completion:([IGNArticleStub]?, NetworkError?) -> ())
    {
        guard error == nil else
        {
            return completion(nil, error)
        }
        
        guard let data = info, articleData = data["articles"] as? NSArray else
        {
            return completion(nil, error)
        }
        
        let articles = articleData.flatMap { IGNArticleStub(dictionary: $0 as! JSONDictionary)}
        completion(articles, nil)
    }
}