Dactyloidae iOS initial commit

mobile/ios/Client/Frontend/Browser/SessionRestoreHelper.swift

@@ -0,0 +1,37 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import Foundation
+import WebKit
+
+protocol SessionRestoreHelperDelegate: class {
+    func sessionRestoreHelper(_ helper: SessionRestoreHelper, didRestoreSessionForTab tab: Tab)
+}
+
+class SessionRestoreHelper: TabContentScript {
+    weak var delegate: SessionRestoreHelperDelegate?
+    fileprivate weak var tab: Tab?
+
+    required init(tab: Tab) {
+        self.tab = tab
+    }
+
+    func scriptMessageHandlerName() -> String? {
+        return "sessionRestoreHelper"
+    }
+
+    func userContentController(_ userContentController: WKUserContentController, didReceiveScriptMessage message: WKScriptMessage) {
+        if let tab = tab, let params = message.body as? [String: AnyObject] {
+            if params["name"] as! String == "didRestoreSession" {
+                DispatchQueue.main.async {
+                    self.delegate?.sessionRestoreHelper(self, didRestoreSessionForTab: tab)
+                }
+            }
+        }
+    }
+
+    class func name() -> String {
+        return "SessionRestoreHelper"
+    }
+}