shepting · June 26, 2017 18:45 · Jun 26, 2017
diff --git a/JSONParsing.swift b/JSONParsing.swift
@@ -0,0 +1,41 @@
+//
+//  JSONParsing.swift
+//  DemoPersonViewer
+//
+//  Created by Steven Hepting on 6/26/17.
+//  Copyright © 2017 Hepting. All rights reserved.
+//
+
+import Foundation
+
+typealias JSONDict = [String: Any]
+
+extension Dictionary where Key == String {
+    func string(_ key: String) -> String? {
+        if let value = self[key] as? String {
+            return value
+        } else {
+            print("Missing parameter '\(key)'")
+            return nil
+        }
+    }
+
+    func array(_ key: String) -> [JSONDict] {
+        if let value = self[key] as? [JSONDict] {
+            return value
+        } else {
+            print("Missing parameter '\(key)'")
+            return []
+        }
+    }
+
+    func dict(_ key: String) -> JSONDict? {
+        if let value = self[key] as? JSONDict{
+            return value
+        } else {
+            print("Missing parameter '\(key)'")
+            return nil
+        }
+    }
+}
+
diff --git a/NetworkClient.swift b/NetworkClient.swift
@@ -0,0 +1,54 @@
+//
+//  Networking.swift
+//  DemoPersonViewer
+//
+//  Created by Steven Hepting on 6/23/17.
+//  Copyright © 2017 Hepting. All rights reserved.
+//
+
+import Foundation
+
+
+
+func parseUsersJSON(from data: Data) -> [User] {
+    do {
+        if let json = try JSONSerialization.jsonObject(with: data, options: .allowFragments) as? [String: Any] {
+            var users = [User]()
+            for userJSON in json.array("results") {
+                if let user = User(json: userJSON) {
+                    users.append(user)
+                }
+            }
+            return users
+        }
+    } catch {
+        print("Couldn't parse JSON: \(error)")
+        if let utf8String = String(data: data, encoding: String.Encoding.utf8) {
+            print("Received: \(utf8String)")
+        }
+    }
+
+    return []
+}
+
+
+
+struct Client {
+
+    func loadUsers(completion: @escaping ([User], Error?) -> ()) {
+        let url = URL(string: "https://randomuser.me/api?results=20")!
+        let task = URLSession.shared.dataTask(with: url) {data, response, error in
+            var users = [User]()
+            if let data = data {
+                users = parseUsersJSON(from: data)
+            }
+
+            if let error = error {
+                print(error)
+            }
+
+            completion(users, error)
+        }
+        task.resume()
+    }
+}
diff --git a/User.swift b/User.swift
@@ -0,0 +1,28 @@
+//
+//  User.swift
+//  DemoPersonViewer
+//
+//  Created by Steven Hepting on 6/26/17.
+//  Copyright © 2017 Hepting. All rights reserved.
+//
+
+import Foundation
+
+struct User {
+    let first: String
+    let last: String
+    let thumbnail: URL
+    //    let fullProfile: URL
+
+    init?(json: [String: Any]) {
+        guard let name = json.dict("name") else { return nil }
+        guard let first = name.string("first") else { return nil }
+        guard let last = name.string("last") else { return nil }
+        guard let thumbnail = json.dict("picture")?.string("thumbnail") else { return nil }
+        guard let thumbnailURL = URL(string: thumbnail) else { return nil }
+
+        self.first = first
+        self.last = last
+        self.thumbnail = thumbnailURL
+    }
+}