Lua IsPathBlocked(fromPos, toPos)

[Tufte]

I need a function that checks whether a player can walk to a location or not. Can this be done in lua or does it require source editing? I was looking at the autowalk sourcecode, and tried to make a lua function using the existing code but I failed. Here is what I tried:

int32_t LuaScriptInterface::luaCanMoveTo(lua_State* L)
{
    uint32_t cid = popNumber(L);
    LuaVariant var = popVariant(L);
    Player* player = g_game.getPlayerByID(cid);


    std::list<Direction> listDir;

    if (g_game.getPathTo(player, var.pos, listDir, 7)) {
        return 1;
    }
    return 0;
}