Add AppRouteGroupProtocol.modalLevel, add default impl of Comparable

1 files changed, 19 insertions, 5 deletions

diff --git a/ios/MullvadVPN/Coordinators/App/ApplicationRouter.swift b/ios/MullvadVPN/Coordinators/App/ApplicationRouter.swift
index a5118e47e2..880593e2bd 100644
--- a/ios/MullvadVPN/Coordinators/App/ApplicationRouter.swift
+++ b/ios/MullvadVPN/Coordinators/App/ApplicationRouter.swift
@@ -19,6 +19,24 @@ protocol AppRouteGroupProtocol: Comparable, Equatable, Hashable {
      controller.
      */
     var isModal: Bool { get }
+
+    /**
+     Defines a modal level that's used for restricting modal presentation.
+
+     A group with higher modal level can be presented above a group with lower level but not the other way around. For example, if a modal group is represented by
+     `UIAlertController`, it should have the highest level (i.e `Int.max`) to prevent other modals from being presented above it, however it enables alert
+     controller to be presented above any other modal.
+     */
+    var modalLevel: Int { get }
+}
+
+/**
+ Default implementation of `Comparable` for `AppRouteGroupProtocol` which compares `modalLevel` of both sides.
+ */
+extension AppRouteGroupProtocol {
+    static func < (lhs: Self, rhs: Self) -> Bool {
+        lhs.modalLevel < rhs.modalLevel
+    }
 }
 
 /**
@@ -83,7 +101,7 @@ enum AppRouteGroup: Comparable, Equatable, Hashable {
         }
     }
 
-    private var order: Int {
+    var modalLevel: Int {
         switch self {
         case .primary:
             return 0
@@ -91,10 +109,6 @@ enum AppRouteGroup: Comparable, Equatable, Hashable {
             return 1
         }
     }
-
-    static func < (lhs: AppRouteGroup, rhs: AppRouteGroup) -> Bool {
-        lhs.order < rhs.order
-    }
 }
 
 /**