mbuchetics · June 30, 2017 09:30 · Jun 23, 2017
diff --git a/codeableEnum.swift b/codeableEnum.swift
@@ -0,0 +1,62 @@
+struct User: Codable {
+    var name: String
+    var email: String
+    var id: String
+    var metadata: [String: MetadataType]
+
+    enum CodingKeys: String, CodingKey {
+        case name, email, id, metadata
+    }
+}
+
+enum MetadataType: Codable {
+    case double(Double)
+    case string(String)
+
+    init(from decoder: Decoder) throws {
+        let container = try decoder.singleValueContainer()
+        do {
+            self = try .double(container.decode(Double.self))
+        } catch DecodingError.typeMismatch {
+            do {
+                self = try .string(container.decode(String.self))
+            } catch DecodingError.typeMismatch {
+                throw DecodingError.typeMismatch(MetadataType.self, DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Encoded payload not of an expected type"))
+            }
+        }
+    }
+
+    func encode(to encoder: Encoder) throws {
+        var container = encoder.singleValueContainer()
+        switch self {
+        case .double(let double):
+            try container.encode(double)
+        case .string(let string):
+            try container.encode(string)
+        }
+    }
+}
+
+import Foundation
+
+let decoder = JSONDecoder()
+
+let userJson = """
+    {
+    "id": "4yq6txdpfadhbaqnwp3",
+    "email": "[email protected]",
+    "name":"John Doe",
+    "metadata": {
+      "link_id": "linked-id",
+      "buy_count": 4
+    }
+  }
+""".data(using: .utf8)!
+
+let user = try! decoder.decode(User.self, from: userJson)
+print(user)
+
+let encoder = PropertyListEncoder()
+encoder.outputFormat = .xml
+let plist = try! encoder.encode(user)
+print(String(data: plist, encoding: .utf8)!)