Reactions.h

// Copyright 2026 Stream.IO, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "ReactionGroup.h"
 
#include "Reactions.generated.h"
 
struct FUserRef;
struct FReaction;
struct FReactionDto;
 
USTRUCT(BlueprintType)
struct STREAMCHAT_API FReactions
{
    GENERATED_BODY()
 
    
    static FReactions CollectReactions(
        UUserManager* UserManager,
        const TMap<FName, int32>& ReactionCounts,
        const TMap<FName, int32>& ReactionScores,
        const TArray<FReactionDto>& LatestReactions,
        const TArray<FReactionDto>& OwnReactions);
 
    void AddReaction(const FReaction&, bool bUpdateCounts);
 
    void RemoveReactionWhere(TFunctionRef<bool(const FReaction&)> Predicate);
 
    bool IsEmpty() const;
 
    int LocalCount() const;
 
    // If the reaction data complete, or do we still need to fetch some?
    bool HasAllDataLocally() const;
 
    TOptional<FReaction> GetOwnReaction(const FName& ReactionType, const UUserManager*) const;
 
    const TMap<FName, FReactionGroup>& GetReactionGroups() const;
 
    TMap<FName, int32> GetScores() const;
 
private:
    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Stream Chat|Message", meta = (AllowPrivateAccess))
    TMap<FName, FReactionGroup> ReactionGroups;
};
 
UCLASS()
class STREAMCHAT_API UReactionsBlueprintLibrary final : public UBlueprintFunctionLibrary
{
    GENERATED_BODY()
 
public:
    UFUNCTION(BlueprintPure, Category = "Stream Chat|Reactions", meta = (DisplayName = "Has Own Reaction"))
    static bool HasOwnReaction(const FReactions& Reactions, const FName& ReactionType);
 
    UFUNCTION(BlueprintPure, Category = "Stream Chat|Reactions")
    static bool IsEmpty(const FReactions& Reactions);
};