Save Your Cash
Lesson 17 of 18 in Coddy's Roblox Game: Factory Tycoon course.
Nobody plays a tycoon that forgets them. A DataStore keeps a table per player, under their UserId: their Cash and Rebirths, saved when they leave and loaded when they join.
factoryStore:SetAsync(player.UserId, { Cash = 120, Rebirths = 1 })
local saved = factoryStore:GetAsync(player.UserId)
print(saved.Cash) --> 120Calls to a DataStore can fail, so each one is wrapped in pcall. Saving runs on PlayerRemoving, and for everyone in game:BindToClose, which runs when the server shuts down.
When the owner leaves, the factory is also freed: reset, the claim pad green again, the sign back to its message, ready for the next player. That is the second use of resetFactory, and the reason startDropper guards against running twice: a new claim starts the first dropper again while its old loop is still going.
Challenge
HardSave the player and free the factory:
- Get
DataStoreServiceand a DataStore namedFactory. - In PlayerAdded, after the leaderstats: load their table with
GetAsync(player.UserId)in a pcall, and if found, set Cash and Rebirths from it. - Write
saveFactory(player):SetAsync(player.UserId, { Cash = ..., Rebirths = ... })in a pcall. - On PlayerRemoving: save; and if they own the factory, set owner to nil, reset the factory, make the claim pad green and Neon again, and put the claim message back on the sign. Save everyone in
game:BindToClosetoo.
Press Play, earn, Stop, Play again: your Cash comes back. Then Check.
Try it yourself
local Players = game:GetService("Players")
local ServerStorage = game:GetService("ServerStorage")
local CollectionService = game:GetService("CollectionService")
local TweenService = game:GetService("TweenService")
local Debris = game:GetService("Debris")
local Settings = require(game.ReplicatedStorage.Settings)
local tycoon = workspace.Tycoon
local items = ServerStorage.TycoonItems
local rebirthPad = ServerStorage.RebirthPad
local owner = nil
local headline = "Step on the green pad to claim this factory"
local earned = 0
print("Ore is worth " .. Settings.OreValue .. " Cash")
-- Every player gets Cash and Rebirths on the leaderboard
Players.PlayerAdded:Connect(function(player)
local leaderstats = Instance.new("Folder")
leaderstats.Name = "leaderstats"
leaderstats.Parent = player
local cash = Instance.new("IntValue")
cash.Name = "Cash"
cash.Parent = leaderstats
local rebirths = Instance.new("IntValue")
rebirths.Name = "Rebirths"
rebirths.Parent = leaderstats
end)
-- The sign above the factory
local gui = Instance.new("SurfaceGui")
gui.Parent = tycoon.Sign
local signLabel = Instance.new("TextLabel")
signLabel.Name = "Status"
signLabel.Size = UDim2.fromScale(1, 1)
signLabel.BackgroundColor3 = Color3.fromRGB(25, 25, 35)
signLabel.TextColor3 = Color3.fromRGB(255, 255, 255)
signLabel.TextScaled = true
signLabel.Text = "Step on the green pad to claim this factory"
signLabel.Parent = gui
local function setSign(text)
signLabel.Text = text
end
-- Ore: a small part worth Cash, dropped under a dropper
local function dropOre(dropper)
local ore = Instance.new("Part")
ore.Name = "Ore"
ore.Size = Vector3.new(1, 1, 1)
ore.Color = Color3.fromRGB(150, 150, 160)
ore.Position = dropper.Position - Vector3.new(0, 2.5, 0)
ore:SetAttribute("Value", Settings.OreValue)
if math.random() < Settings.GoldChance then
ore.Color = Color3.fromRGB(255, 200, 40)
ore.Material = Enum.Material.Neon
ore:SetAttribute("Value", Settings.OreValue * 5)
end
ore.Parent = workspace
Debris:AddItem(ore, 20)
end
-- A dropper runs one loop, however often it is started
local function startDropper(dropper)
if dropper:GetAttribute("Running") then
return
end
dropper:SetAttribute("Running", true)
task.spawn(function()
while dropper:IsDescendantOf(workspace) do
dropOre(dropper)
task.wait(Settings.DropInterval)
end
dropper:SetAttribute("Running", nil)
end)
end
-- The conveyor carries whatever rests on it
tycoon.Conveyor.AssemblyLinearVelocity = Vector3.new(Settings.BeltSpeed, 0, 0)
-- The collector turns ore into Cash
tycoon.Collector.Touched:Connect(function(hit)
if hit.Name == "Ore" then
local value = hit:GetAttribute("Value")
hit:Destroy()
if owner then
value = math.floor(value * (1 + owner.leaderstats.Rebirths.Value * Settings.RebirthBonus))
owner.leaderstats.Cash.Value += value
earned += value
end
end
end)
-- The upgrader doubles each ore that passes through it, once
items.Upgrader.Touched:Connect(function(hit)
if hit.Name == "Ore" and not hit:GetAttribute("Upgraded") then
hit:SetAttribute("Upgraded", true)
hit:SetAttribute("Value", hit:GetAttribute("Value") * 2)
hit.Color = Color3.fromRGB(155, 89, 182)
end
end)
-- Pads that wait for an item to be built first
local waiting = Instance.new("Folder")
waiting.Name = "WaitingPads"
waiting.Parent = ServerStorage
-- Pads already bought, kept for the next rebirth
local bought = Instance.new("Folder")
bought.Name = "BoughtPads"
bought.Parent = ServerStorage
-- A new part rises into place
local function riseIn(part)
local goal = part.Position
local transparency = part.Transparency
part.Position = goal - Vector3.new(0, 8, 0)
part.Transparency = 1
TweenService:Create(part, TweenInfo.new(1), { Position = goal, Transparency = transparency }):Play()
end
local function checkComplete()
if #tycoon.Buttons:GetChildren() == 0 and #waiting:GetChildren() == 0 then
headline = "Factory complete! Step on the purple pad to rebirth"
setSign(headline)
rebirthPad.Parent = tycoon
end
end
-- Put a bought item in the factory
local function build(item)
item.Parent = tycoon.Built
if item:IsA("BasePart") then
riseIn(item)
end
for _, part in item:GetDescendants() do
if part:IsA("BasePart") then
riseIn(part)
end
end
if item:HasTag("Dropper") then
-- start dropping once it is in place
task.delay(1, startDropper, item)
end
for _, pad in waiting:GetChildren() do
if pad:GetAttribute("After") == item.Name then
pad.Parent = tycoon.Buttons
end
end
checkComplete()
end
-- Buying: the pad goes away and its item is built
local function buy(pad, player)
if player ~= owner or pad.Parent ~= tycoon.Buttons then
return
end
local cash = player.leaderstats.Cash
local price = pad:GetAttribute("Price")
if cash.Value < price then
return
end
cash.Value -= price
pad.Parent = bought
build(items:FindFirstChild(pad:GetAttribute("Item")))
end
for _, pad in tycoon.Buttons:GetChildren() do
pad.Touched:Connect(function(hit)
local player = Players:GetPlayerFromCharacter(hit.Parent)
if player then
buy(pad, player)
end
end)
end
-- A price tag floats over every pad
for _, pad in tycoon.Buttons:GetChildren() do
local tag = Instance.new("BillboardGui")
tag.Name = "PriceTag"
tag.Size = UDim2.fromOffset(160, 40)
tag.StudsOffset = Vector3.new(0, 3, 0)
tag.Parent = pad
local label = Instance.new("TextLabel")
label.Size = UDim2.fromScale(1, 1)
label.BackgroundColor3 = Color3.fromRGB(25, 25, 35)
label.BackgroundTransparency = 0.2
label.TextColor3 = Color3.fromRGB(255, 255, 255)
label.TextScaled = true
label.Text = pad:GetAttribute("Label") .. ": $" .. pad:GetAttribute("Price")
label.Parent = tag
end
-- Only the first pads show at the start
for _, pad in tycoon.Buttons:GetChildren() do
if pad:GetAttribute("After") then
pad.Parent = waiting
end
end
-- Back to an empty factory: items to storage, pads back where they started
local function resetFactory()
rebirthPad.Parent = ServerStorage
for _, item in tycoon.Built:GetChildren() do
item.Parent = items
end
for _, pad in bought:GetChildren() do
if pad:GetAttribute("After") then
pad.Parent = waiting
else
pad.Parent = tycoon.Buttons
end
end
end
rebirthPad.Touched:Connect(function(hit)
local player = Players:GetPlayerFromCharacter(hit.Parent)
if player and player == owner and rebirthPad.Parent == tycoon then
resetFactory()
player.leaderstats.Rebirths.Value += 1
player.leaderstats.Cash.Value = 0
headline = player.Name .. "'s Factory"
setSign(headline)
end
end)
-- The sign shows the owner's income, every 5 seconds
task.spawn(function()
while true do
task.wait(5)
if owner then
setSign(headline .. "\n$" .. math.floor(earned / 5) .. " a second")
end
earned = 0
end
end)
-- Claiming: the first player to step on the pad owns the factory
local claimPad = tycoon.ClaimPad
claimPad.Touched:Connect(function(hit)
local player = Players:GetPlayerFromCharacter(hit.Parent)
if player and not owner then
owner = player
claimPad.Color = Color3.fromRGB(120, 120, 120)
claimPad.Material = Enum.Material.SmoothPlastic
headline = player.Name .. "'s Factory"
setSign(headline)
for _, dropper in CollectionService:GetTagged("Dropper") do
if dropper:IsDescendantOf(workspace) then
startDropper(dropper)
end
end
end
end)
This lesson includes a short quiz. Start the lesson to answer it and track your progress.