contact ring id : fix bad formatting

- trimms the the string "from" received by the daemon's
IncomingCall signal

Change-Id: I0dd6afcfcd43847afbda640b387465d12a9930d8

RingD.cpp

@@ -194,6 +194,9 @@ RingClientUWP::RingD::startDaemon()
                 auto callId2 = toPlatformString(callId);
                 auto from2 = toPlatformString(from);
 
+                /* fix some issue in the daemon --> <...@...> */
+                from2 = Utils::TrimRingId(from2);
+
                 CoreApplication::MainView->CoreWindow->Dispatcher->RunAsync(
                     CoreDispatcherPriority::Normal, ref new DispatchedHandler([=]()
                 {

Utils.h

@@ -106,6 +106,24 @@ Platform::String^ Trim(Platform::String^ s)
     return ref new Platform::String(first, static_cast<unsigned int>(last - first));
 }
 
+/* fix some issue in the daemon --> <...@...> */
+Platform::String^ TrimRingId(Platform::String^ s)
+{
+    const WCHAR* first = s->Begin();
+    const WCHAR* last = s->End();
+
+    while (first != last && *first != '<')
+        ++first;
+
+    while (first != last && last[-1] != '@')
+        --last;
+
+    first++;
+    last--;
+
+    return ref new Platform::String(first, static_cast<unsigned int>(last - first));
+}
+
 Platform::String^ GetNewGUID()
 {
     GUID result;