Add http request error

Author: tustanivsky

CONTRIBUTING.md

@@ -6,7 +6,7 @@ To demonstrate the Unreal SDK capabilities the game can trigger different types
 
 In `Project Settings > Plugins > Sentry` set `DSN` and configure [Debug Symbols Uploading](https://docs.sentry.io/platforms/unreal/configuration/debug-symbols/)
 
-## In-game crashes
+## In-game crashes/errors
 
 ### Null pointer dereference
 
@@ -54,6 +54,10 @@ void HeavyComputeLoop(uint3 DispatchThreadId : SV_DispatchThreadID, uint GroupIn
 
 In order to be able to capture GPU crashes game has to be built with Unreal Engine version that addops this [change](https://github.com/EpicGames/UnrealEngine/pull/12648).
 
+### HTTP request error
+
+Open the in-game shop (button with a cart icon in the upper-right corner of the screen) to purchase the tower upgrade. After clicking the `Upgrade Tower` button the game will send an HTTP request to a dummy server which is expected to return an error. Also, this will trigger the `ensure` check in the corresponding request handler to fail (see `USentryTowerGameInstance::BuyUpgrade` for more details).
+
 ## Breadcrumbs
 
 The game automatically adds breadcrumbs whenever a player levels up, a tower's attack modifier is changed, or the game is restarted from the "Game Over" popup.

Content/Maps/Main.umap

@@ -8,7 +8,7 @@ public SentryTower(ReadOnlyTargetRules Target) : base(Target)
 	{
 		PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
 
-		PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "AIModule", "EnhancedInput", "UMG", "Sentry" });
+		PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "AIModule", "EnhancedInput", "UMG", "Sentry", "HTTP", "Json", "JsonUtilities" });
 
 		if (Target.Platform == UnrealTargetPlatform.Win64)
 		{

Content/Textures/T_Cart.uasset

@@ -2,7 +2,70 @@
 
 #include "SentryTowerGameInstance.h"
 
+#include "HttpModule.h"
+#include "SentrySpan.h"
+#include "SentrySubsystem.h"
+#include "SentryTransaction.h"
+#include "Interfaces/IHttpResponse.h"
+
 void USentryTowerGameInstance::Init()
 {
 	Super::Init();
-}
+}
+
+void USentryTowerGameInstance::BuyUpgrade(const FOnBuyComplete& OnBuyComplete)
+{
+	USentrySubsystem* Sentry = GEngine->GetEngineSubsystem<USentrySubsystem>();
+
+	USentryTransaction* CheckoutTransaction = Sentry->StartTransaction(TEXT("checkout"), TEXT("http.client"));
+
+	USentrySpan* ProcessSpan = CheckoutTransaction->StartChildSpan(TEXT("task"), TEXT("process_upgrade_data"));
+
+	TSharedPtr<FJsonObject> UpgradeDataJsonObject = MakeShareable(new FJsonObject());
+	UpgradeDataJsonObject->SetStringField(TEXT("UpgradeName"), TEXT("NewTower"));
+	UpgradeDataJsonObject->SetStringField(TEXT("PlayerEmail"), TEXT("player@sentry-tower.com"));
+
+	FString JsonString;
+	TSharedRef<TJsonWriter<>> Writer = TJsonWriterFactory<>::Create(&JsonString);
+	if (!FJsonSerializer::Serialize(UpgradeDataJsonObject.ToSharedRef(), Writer))
+	{
+		UE_LOG(LogTemp, Error, TEXT("Failed to serialize JSON object"));
+	}
+
+	FPlatformProcess::Sleep(0.1f);
+
+	ProcessSpan->Finish();
+
+	FString Domain = TEXT("https://aspnetcore.empower-plant.com");
+	FString Endpoint = TEXT("/checkout");
+	FString CheckoutURL = Domain + Endpoint;
+
+	FHttpModule* Http = &FHttpModule::Get();
+	TSharedRef<IHttpRequest, ESPMode::ThreadSafe> HttpRequest = Http->CreateRequest();
+
+	HttpRequest->SetURL(CheckoutURL);
+	HttpRequest->SetVerb("POST");
+	HttpRequest->SetHeader(TEXT("Content-Type"), TEXT("application/json"));
+
+	HttpRequest->SetContentAsString(JsonString);
+
+	HttpRequest->OnProcessRequestComplete().BindLambda([=](FHttpRequestPtr Request, FHttpResponsePtr Response, bool bWasSuccessful)
+	{
+		ensureMsgf(bWasSuccessful && Response.IsValid() && Response->GetResponseCode() == 200, TEXT("Checkout HTTP request failed"));
+
+		if (bWasSuccessful && Response.IsValid() && Response->GetResponseCode() == 200)
+		{
+			UE_LOG(LogTemp, Log, TEXT("Checkout completed"));
+			OnBuyComplete.ExecuteIfBound(true);
+		}
+		else
+		{
+			UE_LOG(LogTemp, Error, TEXT("Checkout failed"));
+			OnBuyComplete.ExecuteIfBound(false);
+		}
+
+		CheckoutTransaction->Finish();
+	});
+
+	HttpRequest->ProcessRequest();
+}

Content/UI/W_GameShop.uasset

@@ -6,11 +6,16 @@
 #include "Engine/GameInstance.h"
 #include "SentryTowerGameInstance.generated.h"
 
+DECLARE_DYNAMIC_DELEGATE_OneParam(FOnBuyComplete, bool, IsSuccessfull);
+
 UCLASS()
 class SENTRYTOWER_API USentryTowerGameInstance : public UGameInstance
 {
 	GENERATED_BODY()
 
 public:
 	virtual void Init() override;
+
+	UFUNCTION(BlueprintCallable, Meta = (AutoCreateRefTerm = "OnBuyComplete"))
+	void BuyUpgrade(const FOnBuyComplete& OnBuyComplete);
 };