fix: SingleNavigator - Modified 'backOrNext' Method

Author: lks574

Sources/LinkNavigator/Builder/SingleNavigationBuilder.swift

@@ -82,10 +82,10 @@ extension SingleNavigationBuilder {
   ///   - item: A `LinkItem` containing the paths and associated values.
   /// - Returns: A `RouteViewController` instance that matches the first path in the `LinkItem` or nil if no match is found.
   func lastPick(controller: UINavigationController?, item: LinkItem) -> RouteViewController? {
-    guard let controller, let first = item.pathList.first else { return .none }
+    guard let controller, let last = item.pathList.first else { return .none }
     return controller.viewControllers
       .compactMap { $0 as? RouteViewController }
-      .last(where: { $0.matchPath == first })
+      .last(where: { $0.matchPath == last })
   }
 
   /// Filters out `RouteViewController` instances that match the paths in the `LinkItem` from the navigation stack.
@@ -99,4 +99,11 @@ extension SingleNavigationBuilder {
       .compactMap { $0 as? RouteViewController }
       .filter { !item.pathList.contains($0.matchPath) }
   }
+
+  public func isContainSequence(item: LinkItem) -> Bool {
+    let currentPathJoin = routeBuilderList.map { $0.matchPath }.joined(separator: ",")
+    let itemPathJoin = item.pathList.joined(separator: ",")
+
+    return currentPathJoin.contains(itemPathJoin)
+  }
 }

Sources/LinkNavigator/Core/Core/SingleLinkNavigator.swift

@@ -216,16 +216,11 @@ extension SingleLinkNavigator {
   ///   - linkItem: The link item containing the `ItemValue` to define the navigation endpoint.
   ///   - isAnimated: A flag indicating whether the navigation should be animated.
   private func _backOrNext(linkItem: LinkItem, isAnimated: Bool) {
-    guard let activeController else { return }
-
-    guard let pick = navigationBuilder.firstPick(controller: activeController, item: linkItem) else {
-      activeController.push(
-        viewController: navigationBuilder.pickBuild(item: linkItem),
-        isAnimated: isAnimated)
+    guard let pick = navigationBuilder.lastPick(controller: activeController, item: linkItem) else {
+      activeController?.merge(new: navigationBuilder.build(item: linkItem), isAnimated: isAnimated)
       return
     }
-
-    activeController.popToViewController(pick, animated: isAnimated)
+    activeController?.popToViewController(pick, animated: isAnimated)
   }
 
   /// Navigates backwards or forwards from the root controller based on the first pick from the navigation builder.
@@ -234,16 +229,11 @@ extension SingleLinkNavigator {
   ///   - linkItem: The link item containing the `ItemValue` to define the navigation endpoint.
   ///   - isAnimated: A flag indicating whether the navigation should be animated.
   private func _rootBackOrNext(linkItem: LinkItem, isAnimated: Bool) {
-    guard let rootController else { return }
-
-    guard let pick = navigationBuilder.firstPick(controller: rootController, item: linkItem) else {
-      rootController.push(
-        viewController: navigationBuilder.pickBuild(item: linkItem),
-        isAnimated: isAnimated)
+    guard let pick = navigationBuilder.lastPick(controller: rootController, item: linkItem) else {
+      rootController?.merge(new: navigationBuilder.build(item: linkItem), isAnimated: isAnimated)
       return
     }
-
-    rootController.popToViewController(pick, animated: isAnimated)
+    rootController?.popToViewController(pick, animated: isAnimated)
   }
 
   // 다시