HttpRequestHandlerRegistrar.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "CoreMinimal.h"
#include "HttpRouteHandle.h"
#include "Templates/UnrealTypeTraits.h"
 
enum class EHttpServerRequestVerbs : uint16;
 
struct FRouteQueryResult
{
    operator bool()
    {
        return !!RouteHandle;
    }
 
    FHttpRouteHandle RouteHandle = nullptr;
 
    TMap<FString, FString> PathParams;
};
 
class FHttpRequestHandlerRegistrar
{
public:
    void AddRoute(const FHttpRouteHandle& Handle);
 
    void RemoveRoute(const FHttpRouteHandle& Handle);
 
    bool ContainsRoute(const FHttpPath& RoutePath, EHttpServerRequestVerbs Verb);
 
    FRouteQueryResult QueryRoute(const FString& Query, EHttpServerRequestVerbs Verb, const TArray<FString>* Parsedtokens = nullptr) const;
private:
    struct FDynamicRouteHandleWrapper
    {
        FDynamicRouteHandleWrapper(FHttpRouteHandle Handle);
 
        FHttpRouteHandle Handle;
        TArray<FString> DynamicPathSectionTokens;
    };
private:
    TTuple<TArray<FHttpRouteHandle>*, int64> FindStaticRoute(const FString& RoutePath, EHttpServerRequestVerbs Verb);
 
    TTuple<TArray<FDynamicRouteHandleWrapper>*, int64> FindDynamicRoute(const FString& RoutePath, EHttpServerRequestVerbs Verb);
 
    bool ContainsStaticRoute(const FHttpPath& RoutePath, EHttpServerRequestVerbs Verb);
 
    bool ContainsDynamicRoute(const FHttpPath& RoutePath, EHttpServerRequestVerbs Verb);
 
    bool RemoveStaticRoute(const FHttpPath& RoutePath, EHttpServerRequestVerbs Verb);
 
    bool RemoveDynamicRoute(const FHttpPath& RoutePath, EHttpServerRequestVerbs Verb);
 
    bool MatchesPath(const TArray<FString>& InPath, const TArray<FString>& TemplatePath) const;
    TMap<FString, FString> ParsePathParameters(const TArray<FString>& InPath, const TArray<FString>& TemplatePath) const;
 
private:
    TMap<const FString, TArray<FHttpRouteHandle>> StaticRoutes;
    TMap<const FString, TArray<FDynamicRouteHandleWrapper>> DynamicRoutes;
};