Now we can connect to the first session from the list

Source/TurnBasedTutorial/MyGameInstanceSubsystem.cpp

@@ -3,6 +3,7 @@
 #include "MyGameInstanceSubsystem.h"
 
 #include "OnlineSubsystemUtils.h"
+#include "Kismet/GameplayStatics.h"
 
 UMyGameInstanceSubsystem::UMyGameInstanceSubsystem() : CreateSessionCompleteDelegate(
 	                                                       FOnCreateSessionCompleteDelegate::CreateUObject(
@@ -45,7 +46,6 @@ void UMyGameInstanceSubsystem::CreateSession(int32 NumPublicConnections, bool bI
 	LastSessionSettings->bAllowJoinInProgress = true;
 	LastSessionSettings->bAllowJoinViaPresence = true;
 	LastSessionSettings->bAllowJoinViaPresenceFriendsOnly = true;
-	LastSessionSettings->bIsDedicated = false;
 	LastSessionSettings->bUsesPresence = true;
 	LastSessionSettings->bIsLANMatch = bIsLANMatch;
 	LastSessionSettings->bShouldAdvertise = true;
@@ -147,8 +147,10 @@ void UMyGameInstanceSubsystem::OnStartSessionCompleted(FName SessionName, bool b
 	{
 		SessionInterface->ClearOnStartSessionCompleteDelegate_Handle(StartSessionCompleteDelegateHandle);
 	}
-
 	OnStartSessionCompleteEvent.Broadcast(bSuccessful);
+
+	// TODO: Move this from gameinstance subsystem. This should not be here.
+	UGameplayStatics::OpenLevel(GetWorld(),"BattleFieldMap", true, "listen");
 }
 
 
@@ -235,7 +237,7 @@ void UMyGameInstanceSubsystem::FindSessions(int32 MaxSearchResults, bool bIsLANQ
 	LastSessionSearch->bIsLanQuery = bIsLANQuery;
 
 	// Disable dedicated server search (maybe enable later, when dedicated server is implemented)
-	LastSessionSearch->QuerySettings.Set(SEARCH_PRESENCE, true, EOnlineComparisonOp::Equals);
+	// LastSessionSearch->QuerySettings.Set(SEARCH_PRESENCE, true, EOnlineComparisonOp::Equals);
 
 	const ULocalPlayer* LocalPlayer = GetWorld()->GetFirstLocalPlayerFromController();
 	if (!SessionInterface->FindSessions(*LocalPlayer->GetPreferredUniqueNetId(), LastSessionSearch.ToSharedRef()))
@@ -286,6 +288,33 @@ void UMyGameInstanceSubsystem::JoinSession(const FOnlineSessionSearchResult& Ses
 	}
 }
 
+void UMyGameInstanceSubsystem::JoinSession(const int32 Index)
+{
+	const IOnlineSessionPtr SessionInterface = Online::GetSessionInterface(GetWorld());
+	if (!SessionInterface.IsValid())
+	{
+		OnJoinSessionCompleteEvent.Broadcast(EOnJoinSessionCompleteResult::UnknownError);
+		return;
+	}
+	if (!LastSessionSearch.IsValid() || Index >= LastSessionSearch->SearchResults.Num())
+	{
+		OnJoinSessionCompleteEvent.Broadcast(EOnJoinSessionCompleteResult::UnknownError);
+		return;
+	}
+
+	JoinSessionCompleteDelegateHandle = SessionInterface->AddOnJoinSessionCompleteDelegate_Handle(
+		JoinSessionCompleteDelegate);
+
+	const ULocalPlayer* LocalPlayer = GetWorld()->GetFirstLocalPlayerFromController();
+	if (!SessionInterface->JoinSession(*LocalPlayer->GetPreferredUniqueNetId(), NAME_GameSession,
+	                                   LastSessionSearch->SearchResults[Index]))
+	{
+		SessionInterface->ClearOnJoinSessionCompleteDelegate_Handle(JoinSessionCompleteDelegateHandle);
+
+		OnJoinSessionCompleteEvent.Broadcast(EOnJoinSessionCompleteResult::UnknownError);
+	}
+}
+
 
 void UMyGameInstanceSubsystem::OnJoinSessionCompleted(FName SessionName, EOnJoinSessionCompleteResult::Type Result)
 {

Source/TurnBasedTutorial/MyGameInstanceSubsystem.h

@@ -48,6 +48,10 @@ public:
 
 	void JoinSession(const FOnlineSessionSearchResult& SessionSearchResult);
 
+	void JoinSession(const int32 Index);
+
+	bool TryConnectToCurrentSession() const;
+	
 	FMyOnCreateSessionComplete OnCreateSessionCompleteEvent;
 	FMyOnUpdateSessionComplete OnUpdateSessionCompleteEvent;
 	FMyOnStartSessionCompete OnStartSessionCompleteEvent;
@@ -71,8 +75,6 @@ protected:
 
 	void OnJoinSessionCompleted(FName SessionName, EOnJoinSessionCompleteResult::Type Result);
 
-	bool TryConnectToCurrentSession() const;
-
 private:
 	FOnCreateSessionCompleteDelegate CreateSessionCompleteDelegate;
 	FDelegateHandle CreateSessionCompleteDelegateHandle;

Source/TurnBasedTutorial/MyMainMenu.cpp

@@ -11,15 +11,21 @@ void UMyMainMenu::NativeConstruct()
 	Super::NativeConstruct();
 
 	HostOnlineGameButton->OnClicked.AddDynamic(this, &ThisClass::UMyMainMenu::OnHostOnlineGameButtonClicked);
+
+	GetMyGameSubsystem()->OnCreateSessionCompleteEvent.AddDynamic(this, &ThisClass::StartSessionWhenCreatingSessonComplete);
 }	
 
 void UMyMainMenu::OnHostOnlineGameButtonClicked()
 {
-	GetMyGameSubsystem()->CreateSession(1, true);
+	GetMyGameSubsystem()->CreateSession(2, true);
-	UGameplayStatics::OpenLevel(GetWorld(), FName(TEXT("BattleFieldMap")));
-	this->RemoveFromParent();
 }
 
+void UMyMainMenu::StartSessionWhenCreatingSessonComplete(bool bSuccess)
+{
+	GetMyGameSubsystem()->StartSession();
+}
+
+
 UMyGameInstanceSubsystem* UMyMainMenu::GetMyGameSubsystem() const
 {
 	const UGameInstance* GameInstance = UGameplayStatics::GetGameInstance(GetWorld());

Source/TurnBasedTutorial/MyMainMenu.h

@@ -26,6 +26,9 @@ protected:
 	UFUNCTION()
 	void OnHostOnlineGameButtonClicked();
 
+	UFUNCTION()
+	void StartSessionWhenCreatingSessonComplete(bool bSuccess);
+	
 private:
 	UMyGameInstanceSubsystem* GetMyGameSubsystem() const;	
 };

Source/TurnBasedTutorial/MySessionListWidget.cpp

@@ -6,15 +6,19 @@
 #include "MyGameInstanceSubsystem.h"
 #include "Components/VerticalBox.h"
 #include "MySessionListEntryWidget.h"
+#include "Components/Button.h"
 #include "Kismet/GameplayStatics.h"
 
 void UMySessionListWidget::NativeConstruct()
 {
 	Super::NativeConstruct();
 
+	RefreshListButton->OnClicked.AddDynamic(this, &ThisClass::OnRefreshListButtonClicked);
+	ConnectToSelectedSessionButton->OnClicked.AddDynamic(this, &ThisClass::ConnectToFirstSession);
+	
 	const auto MyGameInstanceSubsystem = GetMyGameSubsystem();
 	MyGameInstanceSubsystem->OnFindSessionsCompleteEvent.AddUObject(this, &ThisClass::RefreshList);
-
+	MyGameInstanceSubsystem->OnJoinSessionCompleteEvent.AddUObject(this, &ThisClass::OnJoinSessionSuccess);
 
 	// Initiate search
 	MyGameInstanceSubsystem->FindSessions(10, true);
@@ -43,9 +47,31 @@ void UMySessionListWidget::OnRefreshListButtonClicked()
 {
 	// TODO: Show that we started searching...
 	// Initiate search
+	SessionListBox->ClearChildren();
 	GetMyGameSubsystem()->FindSessions(10, true);
 }
 
+void UMySessionListWidget::ConnectToFirstSession()
+{
+	GetMyGameSubsystem()->JoinSession(0);
+}
+
+
+void UMySessionListWidget::OnJoinSessionSuccess(EOnJoinSessionCompleteResult::Type Result)
+{
+	if (Result != EOnJoinSessionCompleteResult::Success)
+	{
+		UE_LOG(LogTemp, Error, TEXT("Failed to connect to session!!"));
+		return;
+	}
+	if (!GetMyGameSubsystem()->TryConnectToCurrentSession())
+	{
+		UE_LOG(LogTemp, Error, TEXT("Failed to travel client to session!!"));
+		return;
+	}
+	UE_LOG(LogTemp, Display, TEXT("Connected and travelled to session!!!"));
+}
+
 
 UMyGameInstanceSubsystem* UMySessionListWidget::GetMyGameSubsystem() const
 {

Source/TurnBasedTutorial/MySessionListWidget.h

@@ -36,9 +36,14 @@ protected:
 	
 	void RefreshList(const TArray<FOnlineSessionSearchResult>& SessionResults, bool bSuccessful);
 
+	void OnJoinSessionSuccess(EOnJoinSessionCompleteResult::Type Result);
+	
 private:
 	UMyGameInstanceSubsystem* GetMyGameSubsystem() const;
 
 	UFUNCTION()
 	void OnRefreshListButtonClicked();
+
+	UFUNCTION()
+	void ConnectToFirstSession();
 };