CallbackManager.h

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/*
 * MIT License
 *
 * Copyright (c) 2020-2022 Frozen Storm Interactive, Yoann Potinet
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
 
#pragma once
 
#include "CoreMinimal.h"
#include "IHubConnection.h"

class FCallbackManager
{
public:
    FCallbackManager();
    ~FCallbackManager();

    TTuple<FName, IHubConnection::FOnMethodCompletion&> RegisterCallback();

    bool InvokeCallback(FName InCallbackId, const FSignalRValue& InArguments, bool InRemoveCallback);

    bool RemoveCallback(FName InCallbackId);

    void Clear(const FString& ErrorMessage);
 
private:
    FName GenerateCallbackId();
 
    TMap<FName, IHubConnection::FOnMethodCompletion> Callbacks;
    FCriticalSection CallbacksLock;
 
    FThreadSafeCounter CurrentId;
};