improve StackCellGenerator to support nib based views

Author: NullIsOne

Source/Stack/Generators/BaseStackCellGenerator.swift

@@ -5,16 +5,60 @@
 //  Created by Никита Коробейников on 06.09.2021.
 //
 
+import UIKit
+
 open class BaseStackCellGenerator<View: ConfigurableItem>: StackCellGenerator, ViewBuilder {
 
     public let model: View.Model
 
-    public init(with model: View.Model) {
+    // MARK: - Private properties
+
+    private let registerType: CellRegisterType
+
+    public init(with model: View.Model,
+                registerType: CellRegisterType = .class) {
         self.model = model
+        self.registerType = registerType
     }
 
     public func build(view: View) {
         view.configure(with: model)
     }
 
+    public func generate(stackView: UIStackView, index: Int) -> UIView {
+        let view = createView()
+        self.build(view: view)
+        return view
+    }
+
+}
+
+// MARK: - Private
+
+private extension BaseStackCellGenerator {
+
+    func createView() -> ViewType {
+        switch registerType {
+        case .nib:
+            return ViewType.loadFromNib(bundle: ViewType.bundle() ?? .main)
+        case .class:
+            return ViewType()
+        }
+    }
+
+}
+
+private extension ConfigurableItem {
+
+    static func loadFromNib<T: UIView>(bundle: Bundle) -> T {
+        let nibName = String(describing: self)
+        let nib = UINib(nibName: nibName, bundle: bundle)
+
+        guard let view = nib.instantiate(withOwner: self, options: nil).first as? T else {
+            return T()
+        }
+
+        return view
+    }
+
 }

Source/Stack/View+RDDM.swift

@@ -7,8 +7,8 @@
 
 public extension StaticDataDisplayWrapper where Base: ConfigurableItem {
 
-    func baseStackGenerator(with model: Base.Model) -> BaseStackCellGenerator<Base> {
-        .init(with: model)
+    func baseStackGenerator(with model: Base.Model, and registerType: CellRegisterType = .class) -> BaseStackCellGenerator<Base> {
+        .init(with: model, registerType: registerType)
     }
 
 }