Delete PageValidator

Author: kitasuke

Pod/Classes/PagingMenuController.swift

@@ -25,7 +25,7 @@ public extension PagingMenuControllerDelegate {
 internal let MinimumSupportedViewCount = 1
 internal let VisiblePagingViewNumber = 3
 
-open class PagingMenuController: UIViewController, PagingValidator {
+open class PagingMenuController: UIViewController {
     weak public var delegate: PagingMenuControllerDelegate? {
         didSet {
             guard let menuView = menuView else { return }
@@ -520,3 +520,54 @@ extension PagingMenuController: ViewCleanable {
         }
     }
 }
+
+// MARK: Validator
+
+extension PagingMenuController {
+    fileprivate func validate(_ options: PagingMenuControllerCustomizable) {
+        validateDefaultPage(options)
+        validateContentsCount(options)
+        validateInfiniteMenuItemNumbers(options)
+    }
+    
+    fileprivate func validateContentsCount(_ options: PagingMenuControllerCustomizable) {
+        switch options.componentType {
+        case .all(let menuOptions, let pagingControllers):
+            guard menuOptions.itemsOptions.count == pagingControllers.count else {
+                raise("number of menu items and view controllers doesn't match")
+                return
+            }
+        default: break
+        }
+    }
+    
+    fileprivate func validateDefaultPage(_ options: PagingMenuControllerCustomizable) {
+        let maxCount: Int
+        switch options.componentType {
+        case .pagingController(let pagingControllers): maxCount = pagingControllers.count
+        case .all(_, let pagingControllers):
+            maxCount = pagingControllers.count
+        case .menuView(let menuOptions): maxCount = menuOptions.itemsOptions.count
+        }
+        
+        guard options.defaultPage >= maxCount || options.defaultPage < 0 else { return }
+        
+        raise("default page is invalid")
+    }
+    
+    fileprivate func validateInfiniteMenuItemNumbers(_ options: PagingMenuControllerCustomizable) {
+        guard case .all(let menuOptions, _) = options.componentType,
+            case .infinite = menuOptions.displayMode else { return }
+        guard menuOptions.itemsOptions.count < VisiblePagingViewNumber else { return }
+        
+        raise("number of view controllers should be more than three with Infinite display mode")
+    }
+    
+    fileprivate var exceptionName: String {
+        return "PMCException"
+    }
+    
+    fileprivate func raise(_ reason: String) {
+        NSException(name: NSExceptionName(rawValue: exceptionName), reason: reason, userInfo: nil).raise()
+    }
+}