Merge pull request pichillilorenzo#7 from jj-lin/TWECACAPP-560-Facebo…

…ok-login-at-merchant-page

Handle Facebook Login at merchant page

ios/Classes/InAppWebView.swift

@@ -1601,6 +1601,11 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
     }
 
     public func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
+        if (popupWebView != nil) {
+            popupWebView?.removeFromSuperview()
+            popupWebView = nil
+        }
+
         currentURL = url
         InAppWebView.credentialsProposed = []
         evaluateJavaScript(platformReadyJS, completionHandler: nil)
@@ -2060,15 +2065,40 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
         lastScrollX = scrollView.contentOffset.x
         lastScrollY = scrollView.contentOffset.y
     }
-
+
+    var popupWebView : WKWebView?
+
+    // sample url: https://m.facebook.com/v2.8/dialog/oauth?app_id=1091264071008011....
+    func isFacebookLogin(url: URL) -> Bool {
+        return url.host?.contains("facebook") == true && url.path.contains("oauth")
+    }
+
     public func webView(_ webView: WKWebView,
                         createWebViewWith configuration: WKWebViewConfiguration,
                   for navigationAction: WKNavigationAction,
                   windowFeatures: WKWindowFeatures) -> WKWebView? {
-        onCreateWindow(url: navigationAction.request.url!, navigationType: navigationAction.navigationType)
+        guard let url = navigationAction.request.url else { return nil }
+
+        if navigationAction.targetFrame?.isMainFrame != true && isFacebookLogin(url: url) {
+            let newWebView = WKWebView(frame: webView.frame, configuration: configuration)
+            newWebView.load(navigationAction.request)
+            newWebView.uiDelegate = self
+            webView.superview?.addSubview(newWebView)
+            popupWebView = newWebView
+            return newWebView
+        }
+
+        onCreateWindow(url: url, navigationType: navigationAction.navigationType)
         return nil
     }
-
+
+    public func webViewDidClose(_ webView: WKWebView) {
+        webView.removeFromSuperview()
+        if webView === popupWebView {
+            popupWebView = nil
+        }
+    }
+
     public func webViewWebContentProcessDidTerminate(_ webView: WKWebView) {
         onWebContentProcessDidTerminate()
     }