60 lines
1.6 KiB
Lua
60 lines
1.6 KiB
Lua
oop = require("oop/oop")
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function BankAccount(cls)
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cls.setattr(cls, "owner", nil, cls.visibility.PUBLIC)
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cls.setattr(cls, "balance", nil, cls.visibility.PUBLIC)
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cls.setattr(cls, "pin", nil, cls.visibility.PROTECTED)
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cls.setattr(cls, "token", nil, cls.visibility.PRIVATE)
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cls.method("deposit", function(this, amount)
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this.balance = this.balance + amount
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print("deposit:", amount, "balance:", this.balance)
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end, cls.visibility.PUBLIC)
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cls.method("withdraw", function(this, amount, pin)
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if pin ~= this.pin then
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print("bad pin")
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return
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end
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this.balance = this.balance - amount
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print("withdraw:", amount, "balance:", this.balance)
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end, cls.visibility.PUBLIC)
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cls.method("audit", function(this)
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print("audit:", this.owner, "balance:", this.balance)
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end, cls.visibility.PROTECTED)
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cls.method("rotate_token", function(this)
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this.token = "t-" .. tostring(os.time())
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print("token rotated")
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end, cls.visibility.PRIVATE)
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function cls.__init(this, owner, pin)
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this.owner = owner
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this.balance = 0
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this.pin = pin
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this.token = "t-" .. tostring(os.time())
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end
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end
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function PremiumAccount(cls)
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cls.inherit(BankAccount)
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function cls.monthly_bonus(this)
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this.deposit(25)
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this.audit()
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end
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end
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local acct = BankAccount("Kim", 1234)
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acct.deposit(100)
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acct.withdraw(30, 1234)
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local vip = PremiumAccount("Sam", 9999)
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vip.monthly_bonus()
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local ok, err = pcall(function()
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vip.rotate_token()
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end)
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print("rotate_token from outside:", ok, err)
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