VaRestSubsystem.h

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// Copyright 2014-2020 Vladimir Alyamkin. All Rights Reserved.
 
#pragma once
 
#include "VaRestJsonObject.h"
#include "VaRestJsonValue.h"
#include "VaRestRequestJSON.h"
 
#include "Subsystems/EngineSubsystem.h"
 
#include "VaRestSubsystem.generated.h"
 
DECLARE_DYNAMIC_DELEGATE_OneParam(FVaRestCallDelegate, UVaRestRequestJSON*, Request);
 
USTRUCT()
struct FVaRestCallResponse
{
    GENERATED_USTRUCT_BODY()
 
    UPROPERTY()
    UVaRestRequestJSON* Request;
 
    UPROPERTY()
    FVaRestCallDelegate Callback;
 
    FDelegateHandle CompleteDelegateHandle;
    FDelegateHandle FailDelegateHandle;
 
    FVaRestCallResponse()
        : Request(nullptr)
    {
    }
};
 
UCLASS()
class VAREST_API UVaRestSubsystem : public UEngineSubsystem
{
    GENERATED_BODY()
 
public:
    UVaRestSubsystem();
 
    // Begin USubsystem
    virtual void Initialize(FSubsystemCollectionBase& Collection) override;
    virtual void Deinitialize() override;
    // End USubsystem
 
    // Easy URL processing
 
public:
    UFUNCTION(BlueprintCallable, Category = "VaRest|Utility")
    void CallURL(const FString& URL, EVaRestRequestVerb Verb, EVaRestRequestContentType ContentType, UVaRestJsonObject* VaRestJson, const FVaRestCallDelegate& Callback);
 
    void OnCallComplete(UVaRestRequestJSON* Request);
 
protected:
    UPROPERTY()
    TMap<UVaRestRequestJSON*, FVaRestCallResponse> RequestMap;
 
    // Construction helpers
 
public:
    UFUNCTION(BlueprintCallable, meta = (DisplayName = "Construct Json Request (Empty)"), Category = "VaRest|Subsystem")
    UVaRestRequestJSON* ConstructVaRestRequest();
 
    UFUNCTION(BlueprintCallable, meta = (DisplayName = "Construct Json Request"), Category = "VaRest|Subsystem")
    UVaRestRequestJSON* ConstructVaRestRequestExt(EVaRestRequestVerb Verb, EVaRestRequestContentType ContentType);
 
    UFUNCTION(BlueprintCallable, meta = (DisplayName = "Construct Json Object"), Category = "VaRest|Subsystem")
    UVaRestJsonObject* ConstructVaRestJsonObject();
 
    UFUNCTION()
    static UVaRestJsonObject* StaticConstructVaRestJsonObject();
 
    UFUNCTION(BlueprintPure, meta = (DisplayName = "Construct Json Number Value"), Category = "VaRest|Subsystem")
    UVaRestJsonValue* ConstructJsonValueNumber(float Number);
 
    UFUNCTION(BlueprintPure, meta = (DisplayName = "Construct Json String Value"), Category = "VaRest|Subsystem")
    UVaRestJsonValue* ConstructJsonValueString(const FString& StringValue);
 
    UFUNCTION(BlueprintPure, meta = (DisplayName = "Construct Json Bool Value"), Category = "VaRest|Subsystem")
    UVaRestJsonValue* ConstructJsonValueBool(bool InValue);
 
    UFUNCTION(BlueprintPure, meta = (DisplayName = "Construct Json Array Value"), Category = "VaRest|Subsystem")
    UVaRestJsonValue* ConstructJsonValueArray(const TArray<UVaRestJsonValue*>& InArray);
 
    UFUNCTION(BlueprintPure, meta = (DisplayName = "Construct Json Object Value"), Category = "VaRest|Subsystem")
    UVaRestJsonValue* ConstructJsonValueObject(UVaRestJsonObject* JsonObject);
 
    UVaRestJsonValue* ConstructJsonValue(const TSharedPtr<FJsonValue>& InValue);
 
    // Serialization
 
public:
    UFUNCTION(BlueprintCallable, Category = "VaRest|Subsystem")
    UVaRestJsonValue* DecodeJsonValue(const FString& JsonString);
 
    UFUNCTION(BlueprintCallable, Category = "VaRest|Subsystem")
    UVaRestJsonObject* DecodeJsonObject(const FString& JsonString);
 
    // File system integration
 
public:
    UFUNCTION(BlueprintCallable, Category = "VaRest|Utility")
    UVaRestJsonObject* LoadJsonFromFile(const FString& Path, const bool bIsRelativeToContentDir = true);
};