--GUI should set url depending on selected station
local url = "example.com"

--GUI should call this function after setting url
sound.PlayURL( url, "3d", PlayOnCar)



--Backend


--Check for Vehicle and Key press changes every Draw
hook.Add("HUDPaint", "ShowRadioSwitcher", function()
        --if the player is in a Vehicle
        if (IsValid(LocalPlayer():GetVehicle())) then
            --if player is holding down F key
            if (input.IsKeyDown(16)) then
                --Open The GUI
                RadioGUI:Open()
            --if plyer let go of F key
            else
                --Close the GUI
                RadioGUI:Close()
            end
        end
    end )


function PlayOnCar(station)
        --if the URL is valid
        if (IsValid( station )) then
            --set the sound position to the players Vehicle
            station:SetPos(LocalPlayer():GetVehicle():GetPos())
            --play the sound
            station:Play()
        else
            --if the stream is invalid
            LocalPlayer():ChatPrint("No Stream!")
        end
    end