Elixir Account

account.ex

defmodule Account do

    def new(balance \\ 0) do 
        fun = fn -> loop(balance) end

        spawn(fun)
    end

    def deposit(account, amount) do
        send(account, {:deposit, amount})
    end
    

    def withdraw(account, amount) do
        send(account, {:withdraw, amount})
    end
    
    def balance(account) do
        send(account, {:balance, self()})

        receive do 
            {:balance, content} -> {:balance, content}
        end
    end
    

    def loop(balance) do
        receive do
            {:deposit, amount} ->
                loop(balance + amount)
            {:withdraw, amount} ->
                new_balance = if ( balance - amount > 0), do: balance - amount, else: balance - amount - 32
                loop(new_balance)
            {:balance, parent} ->
                send(parent, {:balance, balance}) 
                loop(balance)
        end
        
    end
    
    

end