client.lua

local Light = {}
local Checker = {}
local Lights = {}
local allowedVehiclesLightPositions = {
    ["596"] = {
        Vector3(0.3, -1.45, 0.60),
        Vector3(0.2, -1.45, 0.60),
        Vector3(0, -1.45, 0.60),
        Vector3(-0.2, -1.45, 0.60),
        Vector3(-0.3, -1.45, 0.60)
    },
    ["490"] = {
        Vector3(0.4, -2.45, 0.85),
        Vector3(0.3, -2.45, 0.85),
        Vector3(0.2, -2.45, 0.85),
        Vector3(0, -2.45, 0.85),
        Vector3(-0.2, -2.45, 0.85),
        Vector3(-0.3, -2.45, 0.85),
        Vector3(-0.4, -2.45, 0.85)
    }
}
local timeouts = {
    -- in ms
    lightEffect = 100,
    lightMovement = 300
}

function Checker.new(LightObject)
    local self = {}
    self.constantChecker =
        Timer(
        function()
            if (not isElement(LightObject.vehicle)) then
                Light.destroy(LightObject)
            end
        end,
        timeouts["constantCheck"],
        0
    )
    self.lightEffectChecker =
        Timer(
        function()
            Light.effect(LightObject)
        end,
        timeouts["lightEffect"],
        0
    )
    self.lightMovementChecker =
        Timer(
        function()
            Light.move(LightObject)
        end,
        timeouts["lightMovement"],
        0
    )
    return self
end

function Light.new(vehicle)
    local self = {}
    self.vehicle = vehicle
    self.vehicleModel = tostring(vehicle:getModel())
    self.light = Marker(Vector3(0, 0, 0), "corona", 0.3, 255, 140, 0, 250)
    self.lightEffect = true
    self.position = 1
    self.checker = Checker.new(self)
    return self
end

function Light.effect(self)
    if (isElement(self.vehicle) and isElement(self.light)) then
        if (self.lightEffect) then
            self.light:setAlpha(100)
        else
            self.light:setAlpha(250)
        end
        self.lightEffect = not self.lightEffect
    else
        return self.checker.lightEffectChecker:destroy()
    end
end

function Light.move(self)
    if (isElement(self.vehicle) and isElement(self.light)) then
        if (self.position == #allowedVehiclesLightPositions[self.vehicleModel]) then
            self.position = 0
        end
        self.position = self.position + 1
        self.light:attach(self.vehicle, allowedVehiclesLightPositions[self.vehicleModel][self.position])
    else
        return self.checker.lightMovementChecker:destroy()
    end
end

function Light.destroy(self)
    self.light:destroy()
    self.checker.constantChecker:destroy()
end

function addLight()
    local vehicle = source
    local newLight = Light.new(vehicle)
    Lights[vehicle] = newLight
end
addEvent("addLight", true)
addEventHandler("addLight", getRootElement(), addLight)

function removeLight()
    local vehicle = source
    local myLight = Lights[vehicle]
    Light.destroy(myLight)
    Lights[vehicle] = nil
end
addEvent("removeLight", true)
addEventHandler("removeLight", getRootElement(), removeLight)

function startAllCurrentLightsCreation()
    triggerServerEvent("createAllLights", localPlayer)
end
addEventHandler("onClientResourceStart", getResourceRootElement(getThisResource()), startAllCurrentLightsCreation)