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Update to Swift 4 #7

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Update to Swift 4 #7

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21 changes: 10 additions & 11 deletions Networking.playground/Contents.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -5,12 +5,11 @@
//: It will serve up the current directory, so make sure to be in the directory containing episodes.json

import UIKit
import XCPlayground

import PlaygroundSupport

typealias JSONDictionary = [String: AnyObject]

let url = NSURL(string: "http://localhost:8000/episodes.json")!
let url = URL(string: "http://localhost:8000/episodes.json")!


struct Episode {
Expand All @@ -21,7 +20,7 @@ struct Episode {
extension Episode {
init?(dictionary: JSONDictionary) {
guard let id = dictionary["id"] as? String,
title = dictionary["title"] as? String else { return nil }
let title = dictionary["title"] as? String else { return nil }
self.id = id
self.title = title
}
Expand All @@ -32,15 +31,15 @@ struct Media {}


struct Resource<A> {
let url: NSURL
let parse: NSData -> A?
let url: URL
let parse: (Data) -> A?
}

extension Resource {
init(url: NSURL, parseJSON: AnyObject -> A?) {
init(url: URL, parseJSON: @escaping (Any) -> A?) {
self.url = url
self.parse = { data in
let json = try? NSJSONSerialization.JSONObjectWithData(data, options: [])
let json = try? JSONSerialization.jsonObject(with: data, options: [])
return json.flatMap(parseJSON)
}
}
Expand All @@ -56,8 +55,8 @@ extension Episode {


final class Webservice {
func load<A>(resource: Resource<A>, completion: (A?) -> ()) {
NSURLSession.sharedSession().dataTaskWithURL(resource.url) { data, _, _ in
func load<A>(_ resource: Resource<A>, completion: @escaping (A?) -> ()) {
URLSession.shared.dataTask(with: resource.url) { data, _, _ in
guard let data = data else {
completion(nil)
return
Expand All @@ -68,7 +67,7 @@ final class Webservice {
}


XCPlaygroundPage.currentPage.needsIndefiniteExecution = true
PlaygroundPage.current.needsIndefiniteExecution = true

Webservice().load(Episode.all) { result in
print(result)
Expand Down