server.lua

-- Whitelist check on server join
RegisterServerEvent("Whitelist:WhitelistCheck")
AddEventHandler("Whitelist:WhitelistCheck", function(Whitelist)
    -- Loop though all whitelist entries
    for i in pairs(Whitelist) do
        -- Set all entries to pending
		Whitelist[i] = "pending"
	end

    -- Collect all the data from the whitelist.json file
    local Data = LoadResourceFile(GetCurrentResourceName(), "whitelist.json")
    -- If able to collect data
    if Data then
        -- Place the decoded whitelist into the array
        local Entries = json.decode(Data)

        -- Loop through the whitelist array
        for _, Entry in ipairs(Entries) do
            -- Check if the player exists in the array.
            if GetPlayerIdentifier(source):lower() == Entry.steamhex:lower() then
                -- Loop though all values in whitelist entry
                for i in pairs(Entry) do
                    -- If the value is not the player's steam hex
                    if i ~= "steamhex" then
                        -- If whitelist value is true, aka they have access to that entry
                        if Entry[i] then
                            -- If command is a valid command
                            if Whitelist[i] then
                                -- Allow player to use that command
                                Whitelist[i] = true
                            -- If entry is not valid
                            else
                                -- Print error message to server console
                                print("===================================================================")
                                print("==============================WARNING==============================")
                                print("/" .. i .. " is not a valid whitelist entry, but is listed in ")
                                print(Entry.steamhex:lower() .. "'s whitelist entry. Please correct this")
                                print("issue, and reload the resource.")
                                print("===================================================================")
                            end
                        end
                    end
                end
                -- Break the loop once whitelist entry found
                break
            end
        end
    -- If unable to load JSON file
    else
        -- Print error message to server console
        print("===================================================================")
        print("==============================WARNING==============================")
        print("Unable to load whitelist file for" .. GetCurrentResourceName())
        print("Whitelist has been disabled. This message will appear every time so")
        print("meone joins the server until the issue is corrected.")
        print("===================================================================")
        -- Loop through all whitelist entries
        for i in pairs(Whitelist) do
            -- Grant players all permissions
            Whitelist[i] = true
        end
        -- Override whitelist permission for specific entry
        -- Uncomment and edit this if you want to deny access
        -- to a specific entry for all players when the whitelist
        -- fails to load, otherwise it will be true

        -- Whitelist.SomethingImportantThatShouldBeDenied = false
    end

    -- Loop through all whitelist entries
    for i in pairs(Whitelist) do
        -- If entry is still pending
        if Whitelist[i] == "pending" then
            -- Deny access
            Whitelist[i] = false
        end
    end

	-- Return whietlist object to client
	TriggerClientEvent("Whitelist:Return:WhitelistCheck", source, Whitelist)
end)