added selectable flag to match how android validates

MVMCoreUI/Atomic/Organisms/Carousel/CarouselModel.swift

@@ -22,7 +22,6 @@ import UIKit
     public var backgroundColor: Color?
     public var molecules: [MoleculeModelProtocol & CarouselItemModelProtocol]
     public var index: Int = 0
-    public var selectedIndex: Int?
     public var spacing: CGFloat?
     public var border: Bool?
     public var loop: Bool?
@@ -39,17 +38,25 @@ import UIKit
     public var fieldKey: String?
     public var groupName: String = FormValidator.defaultGroupName
     
+    public var selectable = false
+    public var selectedIndex: Int?
+    
     public init(molecules: [MoleculeModelProtocol & CarouselItemModelProtocol]) {
         self.molecules = molecules
     }
     
     public func formFieldValue() -> AnyHashable? {
-        let indexForForm = selectedIndex ?? index
+        guard selectable else {
-        let item = molecules[indexForForm]
+            // Use visible item value, else index
-        guard let value = item.formFieldValue() else {
+            if let fieldValue = molecules[index].formFieldValue() {
-            return indexForForm
+                return fieldValue
+            }
+            return index
         }
-        return value
+        // Use selected item value, else index
+        guard let selectedIndex = selectedIndex else { return nil }
+        guard let fieldValue = molecules[selectedIndex].formFieldValue() else { return selectedIndex }
+        return fieldValue
     }
     
     //--------------------------------------------------
@@ -61,7 +68,6 @@ import UIKit
         case backgroundColor
         case molecules
         case index
-        case selectedIndex
         case spacing
         case border
         case loop
@@ -76,6 +82,8 @@ import UIKit
         case accessibilityText
         case groupName
         case fieldKey
+        case selectable
+        case selectedIndex
     }
     
     //--------------------------------------------------
@@ -86,6 +94,7 @@ import UIKit
         let typeContainer = try decoder.container(keyedBy: CodingKeys.self)
         molecules = try typeContainer.decodeModels(codingKey: .molecules)
         index = try typeContainer.decodeIfPresent(Int.self, forKey: .index) ?? 0
+        selectable = try typeContainer.decodeIfPresent(Bool.self, forKey: .selectable) ?? false
         selectedIndex = try typeContainer.decodeIfPresent(Int.self, forKey: .selectedIndex)
         backgroundColor = try typeContainer.decodeIfPresent(Color.self, forKey: .backgroundColor)
         spacing = try typeContainer.decodeIfPresent(CGFloat.self, forKey: .spacing)
@@ -108,13 +117,7 @@ import UIKit
         if let groupName = try typeContainer.decodeIfPresent(String.self, forKey: .groupName) {
             self.groupName = groupName
         }
-        if let value = formFieldValue() {
+        baseValue = formFieldValue()
-            baseValue = value
-        } else if let value = selectedIndex {
-            baseValue = value
-        } else {
-            baseValue = index
-        }
    }
 
    public func encode(to encoder: Encoder) throws {
@@ -136,5 +139,8 @@ import UIKit
         try container.encodeIfPresent(accessibilityText, forKey: .accessibilityText)
         try container.encodeIfPresent(fieldKey, forKey: .fieldKey)
         try container.encode(groupName, forKey: .groupName)
+        try container.encode(index, forKey: .index)
+        try container.encode(selectable, forKey: .selectable)
+        try container.encode(selectedIndex, forKey: .selectedIndex)
     }
 }