add legacy support for navigation molecular

fix navigation bugs.

MVMCoreUI/Atomic/Molecules/NavigationBar/NavigationItemModel.swift

@@ -18,6 +18,7 @@ public class NavigationItemModel: NavigationItemModelProtocol, MoleculeModelProt
     public var backgroundColor: Color?
     public var tintColor: Color
     public var line: LineModel?
+    public var alwaysShowBackButton = false
     public var backButton: (NavigationButtonModelProtocol & MoleculeModelProtocol)? = NavigationImageButtonModel(with: "back", action: ActionBackModel())
     public var additionalLeftButtons: [(NavigationButtonModelProtocol & MoleculeModelProtocol)]?
     public var additionalRightButtons: [(NavigationButtonModelProtocol & MoleculeModelProtocol)]?
@@ -30,11 +31,13 @@ public class NavigationItemModel: NavigationItemModelProtocol, MoleculeModelProt
     }
     
     private enum CodingKeys: String, CodingKey {
+        case moleculeName
         case title
         case hidden
         case backgroundColor
         case tintColor
         case line
+        case alwaysShowBackButton
         case backButton
         case showLeftPanelButton
         case showRightPanelButton
@@ -49,6 +52,7 @@ public class NavigationItemModel: NavigationItemModelProtocol, MoleculeModelProt
         backgroundColor = try typeContainer.decodeIfPresent(Color.self, forKey: .backgroundColor) ?? Color(uiColor: .white)
         tintColor = try typeContainer.decodeIfPresent(Color.self, forKey: .tintColor) ?? Color(uiColor: .black)
         line = try typeContainer.decodeIfPresent(LineModel.self, forKey: .line)
+        alwaysShowBackButton = try typeContainer.decodeIfPresent(Bool.self, forKey: .alwaysShowBackButton) ?? false
         if let backButton: (NavigationButtonModelProtocol & MoleculeModelProtocol) = try typeContainer.decodeModelIfPresent(codingKey: .backButton) {
             self.backButton = backButton
         }
@@ -58,11 +62,13 @@ public class NavigationItemModel: NavigationItemModelProtocol, MoleculeModelProt
               
     open func encode(to encoder: Encoder) throws {
         var container = encoder.container(keyedBy: CodingKeys.self)
+        try container.encode(moleculeName, forKey: .moleculeName)
         try container.encodeIfPresent(title, forKey: .title)
         try container.encode(hidden, forKey: .hidden)
-        try container.encode(backgroundColor, forKey: .backgroundColor)
+        try container.encodeIfPresent(backgroundColor, forKey: .backgroundColor)
         try container.encode(tintColor, forKey: .tintColor)
         try container.encodeIfPresent(line, forKey: .line)
+        try container.encode(alwaysShowBackButton, forKey: .alwaysShowBackButton)
         try container.encodeModelIfPresent(backButton, forKey: .backButton)
         try container.encodeModelsIfPresent(additionalLeftButtons, forKey: .additionalLeftButtons)
         try container.encodeModelsIfPresent(additionalRightButtons, forKey: .additionalRightButtons)

MVMCoreUI/Atomic/Protocols/ModelProtocols/NavigationItemModelProtocol.swift

@@ -14,6 +14,7 @@ public protocol NavigationItemModelProtocol {
     var backgroundColor: Color? { get set }
     var tintColor: Color { get set }
     var line: LineModel? { get set }
+    var alwaysShowBackButton: Bool { get set }
     var backButton: (NavigationButtonModelProtocol & MoleculeModelProtocol)? { get set }
     var additionalLeftButtons: [(NavigationButtonModelProtocol & MoleculeModelProtocol)]? { get set }
     var additionalRightButtons: [(NavigationButtonModelProtocol & MoleculeModelProtocol)]? { get set }

MVMCoreUI/Categories/UIColor+Extension.swift

@@ -282,7 +282,9 @@ extension UIColor {
         
         guard let components = color.cgColor.components else { return nil }
         
-        if color.cgColor.numberOfComponents >= 3 {
+        let numberOfComponents = color.cgColor.numberOfComponents
+        if numberOfComponents >= 3 {
+            // RGB color space
             let r = Int(CGFloat(components[0]) * 255)
             let g = Int(CGFloat(components[1]) * 255)
             let b = Int(CGFloat(components[2]) * 255)
@@ -294,6 +296,16 @@ extension UIColor {
             }
             
             return String(format: "%02X%02X%02X", r, g, b)
+        } else if numberOfComponents == 2 {
+            // Monochromatic color space
+            let value = Int(CGFloat(components[0]) * 255)
+
+            // If alpha of color is less than 1.0 then alpha hex is relevant.
+            if components[1] < 1.0 {
+                let alpha = Int(CGFloat(components[1]) * 255)
+                return String(format: "%02X%02X%02X%02X", value, value, value, alpha)
+            }
+            return String(format: "%02X%02X%02X", value, value, value)
         }
         
         return nil

MVMCoreUI/Containers/NavigationController.swift

@@ -48,7 +48,7 @@ import UIKit
         let delegate = (viewController as? MVMCoreViewControllerProtocol)?.delegateObject?() as? MVMCoreUIDelegateObject
         var leftItems: [UIBarButtonItem] = []
         if let backButtonModel = navigationItemModel.backButton,
-            navigationController.viewControllers.count > 1 {
+            navigationController.viewControllers.count > 1 || navigationItemModel.alwaysShowBackButton {
             leftItems.append(backButtonModel.createNavigationItemButton(delegateObject: delegate, additionalData: nil))
         }
         if let leftItemModels = navigationItemModel.additionalLeftButtons {
@@ -90,4 +90,11 @@ import UIKit
         // Sets up the navigation buttons.
         setNavigationButtons(navigationController: navigationController, navigationItemModel: navigationItemModel, viewController: viewController)
     }
+    
+    /// Convenience setter for legacy files
+    public static func set(navigationController: UINavigationController, navigationJSON: [String: Any], viewController: UIViewController) {
+        let moleculeName = ModelRegistry.getType(for: navigationJSON.stringForkey(KeyMoleculeName), with: MoleculeModelProtocol.self)
+        guard let barModel = try? moleculeName?.decode(jsonDict: navigationJSON) as? (MoleculeModelProtocol & NavigationItemModelProtocol) else { return }
+        set(navigationController: navigationController, navigationItemModel: barModel, viewController: viewController)
+    }
 }