fix : client crashes in case of empty account list.

- summons the wizard.
- nb : this patch doesn't solve the problem in the daemon

Change-Id: Ice12e43c04a299affa093031e772ee013b801178
Tuleap: #1240

App.xaml.cpp

@@ -19,6 +19,7 @@
 
 #include "LoadingPage.xaml.h"
 #include "MainPage.xaml.h"
+#include "Wizard.xaml.h"
 
 using namespace Windows::ApplicationModel::Core;
 using namespace Windows::Foundation;
@@ -35,6 +36,9 @@ using namespace RingClientUWP;
 App::App()
 {
     InitializeComponent(); // summon partial class, form generated files trough App.xaml
+
+    /* connect to delegate */
+    RingD::instance->summonWizard += ref new RingClientUWP::SummonWizard(this, &RingClientUWP::App::OnsummonWizard);
 }
 
 void
@@ -60,3 +64,8 @@ App::OnLaunched(LaunchActivatedEventArgs^ e)
     ApplicationView::GetForCurrentView()->TitleBar->ForegroundColor = Colors::White;
     ApplicationView::GetForCurrentView()->TitleBar->ButtonForegroundColor = Colors::White;
 }
+
+void RingClientUWP::App::OnsummonWizard()
+{
+    rootFrame->Navigate(Windows::UI::Xaml::Interop::TypeName(Views::Wizard::typeid));
+}

App.xaml.h

@@ -33,5 +33,6 @@ internal:
 
 private:
     Frame^ rootFrame;
+    void OnsummonWizard();
 };
 }
\ No newline at end of file

RingD.cpp

@@ -47,6 +47,13 @@ RingClientUWP::RingD::reloadAccountList()
     RingClientUWP::ViewModel::AccountsViewModel::instance->clearAccountList();
 
     std::vector<std::string> accountList = DRing::getAccountList();
+
+    /* if for any reason there is no account at all, screen the wizard */
+    if (accountList.size() == 0) {
+        summonWizard();
+        return;
+    }
+
     std::vector<std::string>::reverse_iterator rit = accountList.rbegin();
 
     for (; rit != accountList.rend(); ++rit) {
@@ -380,7 +387,7 @@ RingClientUWP::RingD::startDaemon()
                     CoreApplication::MainView->CoreWindow->Dispatcher->RunAsync(CoreDispatcherPriority::High,
                     ref new DispatchedHandler([=]() {
                         reloadAccountList();
-                        std::vector<std::string> accountList = DRing::getAccountList();
+                        std::vector<std::string> accountList = DRing::getAccountList(); // refacto : there is already a callo to getAccountList in reloadAccountList
                         auto last_id = accountList.back();
                         if (!account_id.compare(last_id)) {
                             auto frame = dynamic_cast<Frame^>(Window::Current->Content);

RingD.h

@@ -34,6 +34,7 @@ delegate void CallPlaced(String^ callId);
 delegate void IncomingMessage(String^ callId, String^ payload);
 delegate void DevicesListRefreshed(Vector<String^>^ devicesList);
 delegate void ExportOnRingEnded(String^ accountId, String^ pin);
+delegate void SummonWizard();
 
 
 public ref class RingD sealed
@@ -109,6 +110,7 @@ internal:
     event CallPlaced^ callPlaced;
     event DevicesListRefreshed^ devicesListRefreshed;
     event ExportOnRingEnded^ exportOnRingEnded;
+    event SummonWizard^ summonWizard;
 
 private:
     /* sub classes */