Checkpoints

-- First make folder name Checkpoints.
-- Make part with number as stage number in folder

-- https://cdn.discordapp.com/attachments/990179256246091812/1173163569412591616/image.png?ex=6562f4b7&is=65507fb7&hm=d5d058b926aa013e1fac9a657c5232b1fb57ac646b4b4a3892910fc07d4891e7&

-- Put script in ServerScriptService
-- Public Roblox then go to Game Settings -> Security -> Enabled Studio Access to API Services -> turn On

-- https://www.youtube.com/watch?v=xeaaFfgdMPM

local checkpoints = workspace:WaitForChild("Checkpoints")

local Players = game:GetService("Players")
local RunService = game:GetService("RunService")

local DatastoreService = game:GetService("DataStoreService")
local Data = DatastoreService:GetDataStore("1")
local sessionData = {}

function PlayerAdded(player)
    local leaderstats = Instance.new("Folder")
    leaderstats.Name
        = "leaderstats"

    local stage = Instance.new("NumberValue")
    stage.Name
        = "Stage"
    stage.Parent = leaderstats

    local success = nil
    local playerData = nil
    local attempt = 1

    repeat
        success, playerData = pcall(function() -- here pcall or protected call is just repeat waiting until the data loads for the player
            return Data:GetAsync(player.UserId)
        end)

        attempt += 1
        if not success then
            warn(playerData)
            task.wait(2)
        end

    until success or attempt == 5 -- it repeats it until it loads

    if success then --if it loads then make the table with their data inside
        print("Data loaded: "..player.Name)
        if not playerData then -- if they have no table then their a new player so we create the table
            print("new player, giving default data")

            playerData = {
                ["Stage"] = 1, --add all your values and stuff inside of the data

            }
        end

        sessionData[player.UserId] = playerData --set the data to a table with the players id and make to make a variable
    else
        warn("couldnt load data: "..player.Name)
        player:Kick("couldnt load your data, rejoin") --if the data couldnt load we kick them so their not just sitting there forever waiting
    end

    stage.Value = sessionData[player.UserId].Stage --here we get the numbervalue created above and get the value of it and set it to the value inside of the table

    stage:GetPropertyChangedSignal("Value"):Connect(function()
        sessionData[player.UserId].Stage = stage.Value --update the table value whenever the leaderstat value changes
    end)


    leaderstats.Parent = player

end

Players.PlayerAdded:Connect(function(player)
    PlayerAdded(player)

    player.CharacterAdded:Connect(function(char)
        local leaderstats = player:WaitForChild("leaderstats")
        local stage = leaderstats.Stage

        local hum = char:WaitForChild("Humanoid")
        task.wait()
        char:MoveTo(checkpoints[stage.Value].Position)

        hum.Touched:Connect(function(hit)
            if hit.Parent == checkpoints then
                if tonumber(hit.Name) == stage.Value + 1 then
                    stage.Value += 1
                end
            end
        end)
    end)
end)



function PlayerLeaving(player)

    if sessionData[player.UserId] then
        local success = nil
        local errorMsg = nil
        local attempt = 1


        repeat
            success, errorMsg = pcall(function()
                Data:SetAsync(player.UserId, sessionData[player.UserId]) --here is the same as loading data just repeat waits until the data saves
            end)

            attempt += 1
            if not success then
                warn(errorMsg)
                task.wait(2)
            end

        until success or attempt == 5

        if success then
            print("Data saved: "..player.Name)
        else
            warn("Cant save: "..player.Name)
        end

    end

end

Players.PlayerRemoving:Connect(PlayerLeaving)

function ServerShutdown()
    if RunService:IsStudio() then
        return
    end

    for i, player in ipairs(Players:GetPlayers()) do
        task.spawn(function()
            PlayerLeaving(player)
        end)
    end
end

game:BindToClose(ServerShutdown)