Persist visit options if a response is present

Source/Session/Session.swift

@@ -14,6 +14,9 @@ public class Session: NSObject {
     private lazy var bridge = WebViewBridge(webView: webView)
     private var initialized = false
     private var refreshing = false
+
+    /// Options behave differently if a response is provided.
+    private let visitOptionsHandler = VisitOptionsHandler()
 
     /// Automatically creates a web view with the passed-in configuration
     public convenience init(webViewConfiguration: WKWebViewConfiguration? = nil) {
@@ -61,7 +64,8 @@ public class Session: NSObject {
             initialized = false
         }
 
-        let visit = makeVisit(for: visitable, options: options ?? VisitOptions())
+        let processedOptions = visitOptionsHandler.process(options)
+        let visit = makeVisit(for: visitable, options: processedOptions)
         currentVisit?.cancel()
         currentVisit = visit
 

Source/Session/VisitOptionsHandler.swift

@@ -0,0 +1,24 @@
+import Foundation
+
+class VisitOptionsHandler {
+
+    private var unhandledVisitOptions: VisitOptions?
+
+    /// If a form submission provides a response HTML, save the options and pass them to the next visit proposal.
+    func process(_ options: VisitOptions?) -> VisitOptions {
+
+        if let options, options.response != nil {
+            /// Options are provided for the next visit.
+            unhandledVisitOptions = options
+            return options
+        } else if let unhandledVisitOptions {
+            /// Next visit is happening. Use the previous visit options.
+            self.unhandledVisitOptions = nil
+            return unhandledVisitOptions
+        } else {
+            /// No options are unhandled.
+            return options ?? VisitOptions()
+        }
+    }
+
+}