Hit a wall with crafting two items together

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PHP Code: (Select All)

void OnStart()
{
    AddUseItemCallback("INTERNAL_NAME", "NAME_OF_ITEM", "NAME_OF_ENTITY", "NAME_OF_CALLBACK", true);
    // Repeat for every item.
}

void NAME_OF_CALLBACK(string &in item, string &in entity)
{
    if (StringContains(item, "medbox"))
        AddLocalVarInt("Medbox", 1);
    else if (StringContains(item, "medicine"))
        AddLocalVarInt("Medicine", 1);

    if (GetLocalVarInt("Medbox") > 0
        && GetLocalVarInt("Medicine") > 2)
    {
        AddLocalVarInt("Medbox", -1);
        AddLocalVarInt("Medicine", -3);
        // Give medkit...
    }
}