feature: Decode each element in array separately (#81)

Author: FranciszekCzana

Diff for: Sources/FeaturevisorTypes/Extensions/KeyedDecodingContainer+DecodeArray.swift

@@ -0,0 +1,27 @@
+import Foundation
+
+extension KeyedDecodingContainer {
+
+    private struct EmptyStructData: Codable {}
+
+    func decodeArrayElements<T: Decodable>(
+        forKey key: KeyedDecodingContainer<K>.Key
+    ) throws -> [T] where T: Decodable {
+
+        var arrayElements: [T] = []
+
+        let container = try nestedUnkeyedContainer(forKey: key)
+        var containerCopy = container
+        while !containerCopy.isAtEnd {
+            if let element = try? containerCopy.decode(T.self) {
+                arrayElements.append(element)
+            }
+            else {
+                // @TODO: add error handling for object decoding failed
+                _ = try containerCopy.decode(EmptyStructData.self)
+            }
+        }
+
+        return arrayElements
+    }
+}

Diff for: Sources/FeaturevisorTypes/Types.swift

@@ -793,9 +793,9 @@ public struct DatafileContent: Decodable {
 
         schemaVersion = try values.decode(String.self, forKey: .schemaVersion)
         revision = try values.decode(String.self, forKey: .revision)
-        attributes = try values.decode([Attribute].self, forKey: .attributes)
-        segments = try values.decode([Segment].self, forKey: .segments)
-        features = try values.decode([Feature].self, forKey: .features)
+        attributes = try values.decodeArrayElements(forKey: .attributes)
+        segments = try values.decodeArrayElements(forKey: .segments)
+        features = try values.decodeArrayElements(forKey: .features)
     }
 
     enum CodingKeys: String, CodingKey {