Server Side

local plrVehTable, vehTable = {}, {}
local curArg

function setVehStatus(plr, cmd, arg1)
    if (not hasObjectPermissionTo(plr, "command.em", false) or getElementDimension(plr) ~= 336) then
        return false
    end
    if (arg1 and arg1 ~= "rem" and arg1 ~= "ghost") then
        outputChatBox("Syntax: /emuveh [ghost/rem]", plr, 255, 0, 0)
        return false
    end
    if (arg1 == "rem") then
        local vehs = getElementsByType("vehicle")
        for i, veh in ipairs(vehs) do
            if (getElementDimension(veh) == 336) then
            local driver = getVehicleController(veh)
                if (driver) then
                    plrVehTable[driver] = veh
                else
                    destroyElement(veh)
                end
            end
        end
        curArg = arg1
        outputChatBox("Enable vehicle auto-remove feature and removed all unoccupied vehicles with successfully!", plr, 0, 255, 0)
        outputChatBox("Warn: If you add new vehicle and it's unoccupied, it won't be auto-removed!", plr, 0, 255, 0)
        exports.CITLogs:logSomething(getPlayerName(plr).." has removed all unused vehicles", "events", plr)
        removeEventHandler("onVehicleExplode", root, setEMVeh)
        removeEventHandler("onVehicleExit", root, leaveVeh)
        removeEventHandler("onElementDataChange", root, onPlrLeaveEMDim)
        addEventHandler("onVehicleExplode", root, setEMVeh)
        addEventHandler("onVehicleExit", root, leaveVeh)
        addEventHandler("onElementDataChange", root, onPlrLeaveEMDim)
        return true
    end
    if (arg1 =="ghost") then
        local vehs = getElementsByType("vehicle")
        for i, veh in ipairs(vehs) do
            if (getElementDimension(veh) == 336) then
            local driver = getVehicleController(veh)
                if (driver) then
                    plrVehTable[driver] = veh
                else
                    table.insert(vehTable, veh)
                end
            end
        end
        curArg = arg1
        triggerClientEvent("CITem.statusCollisions", resourceRoot, true, plrVehTable)
        outputChatBox("Enable unoccupied vehicle as non-ghost!", plr, 0, 255, 0)
        exports.CITLogs:logSomething(getPlayerName(plr).." has enable the ghost mode for all players.", "events", plr)
        removeEventHandler("onVehicleExplode", root, setEMVeh)
        removeEventHandler("onDestroyElement", root, setEMVeh)
        removeEventHandler("onVehicleExit", root, leaveVeh)
        removeEventHandler("onElementDataChange", root, onPlrLeaveEMDim)
        addEventHandler("onVehicleExplode", root, setEMVeh)
        addEventHandler("onDestroyElement", root, setEMVeh)
        addEventHandler("onVehicleExit", root, leaveVeh)
        addEventHandler("onElementDataChange", root, onPlrLeaveEMDim)
        return true
    end
    if (not curArg) then
        outputChatBox("This feature is disabled!", plr, 255, 0, 0)
        return false
    end
    triggerClientEvent("CITem.statusCollisions", resourceRoot, false, plrVehTable)
    exports.CITLogs:logSomething(getPlayerName(plr).." has disable the last feature.", "events", plr)
    plrVehTable, vehTable = {}, {}
    outputChatBox("Disabled feature.", plr, 0, 255, 0)
    curArg = false
end
addCommandHandler("emuveh", setVehStatus)

function setEMVeh()
    if (getElementDimension(source) ~= 336 or not curArg) then
        return false
    end
    local driver = getVehicleController(source)
    if (not plrVehTable[driver]) then
        return false
    end
    plrVehTable[driver] = nil
    if (curArg == "rem") then
        destroyElement(source)
        return true
    end
    table.insert(vehTable, source)
    triggerClientEvent("CITem.statusCollisions", resourceRoot, true, plrVehTable)
end

function leaveVeh(plr)
    if (getElementDimension(source) ~= 336 or not curArg or not plrVehTable[plr]) then
        return false
    end
    plrVehTable[plr] = nil
    if (curArg == "rem") then
        destroyElement(source)
        return true
    end
    table.insert(vehTable, source)
    triggerClientEvent("CITem.statusCollisions", resourceRoot, true, plrVehTable)
end

function onPlrLeaveEMDim(dName)
    if (getElementType(source) ~= "player" or dName ~= "e" or not curArg) then
        return false
    end
    local curKey = getElementData(source, "e", true)
    if (curKey) then
        return false
    end
    if (curArg == "rem" and plrVehTable[source]) then
        destroyElement(plrVehTable[source])
        plrVehTable[source] = nil
        return true
    end
    table.insert(vehTable, plrVehTable[source])
    plrVehTable[source] = nil
    triggerClientEvent("CITem.statusCollisions", resourceRoot, true, plrVehTable)
end