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#! perl |
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|
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# The international bank script. There are five commands one can |
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# give the banker in-game: |
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# - help, will show the usage information |
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# - deposit, can deposit a certain amount of a given currency unit |
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# - withdraw, can give out a certain amount of a given currency unit |
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# provided, the bank account has this amount of money |
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# - exchange, will exchange between imperials and platinum coins |
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# - balance, simply shows how much money one has on his/her account. |
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# |
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# TODO: |
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# - Comment more steps |
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|
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# The units are being used in each sub so they are declared globally. |
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my %unit = ( |
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silver => 1, |
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gold => 10, |
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platina => 50, |
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imperial => 10000, |
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); |
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|
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# Subroutine just to calculate exchange rates. |
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sub calc_exchange_rate { |
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my ($value, $from_cur, $to_cur) = @_; |
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|
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if ($unit{$from_cur} and $unit{$to_cur}) { |
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return $value * $unit{$from_cur} / $unit{$to_cur}; |
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} |
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} |
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|
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# Calculates and returns how much money someone has starting with the |
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# highest value currency going down. Think of it like having the date |
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# and time in the format of 2006-05-19 03:21:31 UTC instead of 1148001691 |
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# seconds since 1970-01-01 00:00:00 UTC. |
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sub balance { |
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my ($who) = @_; |
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my $balance = $who->{bank_balance}; |
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|
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if (!$balance or int($balance) == 0) { |
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return "Sorry, you have no balance."; |
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} else { |
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|
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my $imperials = calc_exchange_rate($balance, "silver", "imperial"); |
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my $platinum = calc_exchange_rate($imperials - int ($imperials), "imperial", "platina"); |
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my $gold = calc_exchange_rate($platinum - int ($platinum), "platina", "gold"); |
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my $silver = calc_exchange_rate($gold - int ($gold), "gold", "silver"); |
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|
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return "You have ".int($imperials)." imperials, ".int($platinum)." platinum, ".int($gold)." gold and about ".int($silver)." silver coins."; |
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} |
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} |
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|
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sub transaction { |
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my ($who, $action, $amount, $currency) = @_; |
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my $pay = $amount * $unit{$currency}; |
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|
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if (!$unit{$currency}) { |
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return "We don't trade in that currency."; |
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} |
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|
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# First check for possible overflow and user stupidity |
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if ($amount > 10000) { |
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return "Sorry, we do not handle more than 10000 units for one ".$action."."; |
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} elsif ($amount == 0) { |
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return "You can not ".$action." nothing."; |
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} elsif ($amount < 0) { |
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return "You can not ".$action." negative values."; |
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} |
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|
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# Here we handle the transactions |
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if ($action eq "deposit") { |
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if ($who->pay_amount ($pay)) { |
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$who->{bank_balance} += $pay; |
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return "$amount $currency received."; |
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} else { |
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return "You don't have enough money with you."; |
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} |
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} elsif ($action eq "withdraw") { |
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if ($who->{bank_balance} - $pay > 0) { |
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$who->{bank_balance} -= $pay; |
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if ($currency eq "imperial") { |
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my $money = cf::object::new ("imperial"); |
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$money->set_property (1, 24, $amount); |
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$money->insert_in_ob ($who); |
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} else { |
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my $money = cf::object::new ($currency."coin"); |
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$money->set_property (1, 24, $amount); |
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$money->insert_in_ob ($who); |
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} |
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return "Withdrew $amount $currency"; |
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} |
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} |
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} |
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|
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sub on_say { |
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my ($event, $ob, $who, $msg) = @_; |
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my ($cmd, $arguments) = split /\s+/, $msg, 2; |
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my ($amount, $currency) = split /\s+/, $arguments, 2; |
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my $service_charge = 5; |
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my @units = sort keys %unit; |
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my $units = join ", ", @units; |
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my $fees = - ($service_charge / 100) + 1; |
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|
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if ($cmd eq "balance") { |
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$who->message ($ob->name." says: ".balance ($who), cf::NDI_WHITE); |
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} |
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|
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elsif ($cmd eq "deposit" and $currency) { |
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$who->message ($ob->name." says: ".transaction($who, "deposit", $amount, $currency), cf::NDI_WHITE); |
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$who->message ($ob->name." says: ".balance ($who), cf::NDI_WHITE); |
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} elsif ($cmd eq "deposit" and $amount and $currency eq "") { |
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$who->message ($ob->name." says: Deposit $amount of what: ".$units.".", cf::NDI_WHITE); |
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} elsif ($cmd eq "deposit" and $amount eq "" and $currency eq "") { |
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$who->message ($ob->name." says: How much do you want to deposit?", cf::NDI_WHITE); |
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} |
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|
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elsif ($cmd eq "withdraw" and $currency) { |
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$who->message ($ob->name." says: ".transaction($who, "withdraw", $amount, $currency), cf::NDI_WHITE); |
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$who->message ($ob->name." says: ".balance ($who), cf::NDI_WHITE); |
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} elsif ($cmd eq "withdraw" and $amount and $currency eq "") { |
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$who->message ($ob->name." says: Withdraw $amount of what: ".$units.".", cf::NDI_WHITE); |
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} elsif ($cmd eq "withdraw" and $amount eq "" and $currency eq "") { |
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$who->message ($ob->name." says: How much do you want to withdraw?", cf::NDI_WHITE); |
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} |
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|
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elsif ($cmd eq "help" or $cmd eq "yes") { |
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$who->message ($ob->name." says: ".help($arguments), cf::NDI_WHITE); |
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} |
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|
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else { |
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$who->message ($ob->name." says: Do you need help?", cf::NDI_WHITE); |
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} |
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} |
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|
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sub help { |
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my ($command) = @_; |
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|
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if ($command eq "") { |
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return "You can: |
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deposit <amount> <currency> |
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withdraw <amount> <currency> |
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balance |
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exchange <amount> <direction> |
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help <topic>"; |
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} elsif ($command eq "deposit") { |
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return "You can deposit some of the money you don't currently use in our bank. To do this, ask me to: |
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deposit <amount> <currency>\nSee help exchange for our currencies."; |
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} elsif ($command eq "withdraw") { |
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return "To get the money you stored in our system back, just say: |
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withdraw <amount> <currency>"; |
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} elsif ($command eq "balance") { |
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return "I can tell you how much money you are saving in our bank, just ask me about your balance."; |
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} elsif ($command eq "exchange") { |
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return "We exchange between imperial notes and platinum coins at a very low price. To change from platinum to imperials, say: |
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exchange <amount> platina\nTo change from imperials to platinum, say: |
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exchange <amount> imperial\nWe currently only exchange between these two currencies. If you want to know more about exchange rates, ask me: |
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help exchange rates\nThanks for using our bank."; |
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} elsif ($command eq "exchange rates") { |
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my @units = sort { $unit{$b} <=> $unit{$a} } keys %unit; |
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my $exchange_rates = "Here is a list of exchange rates:\n"; |
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|
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for my $from_cur_nr (0 .. $#units) { |
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for my $to_cur_nr ($from_cur_nr+1 .. $#units) { |
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$exchange_rates = $exchange_rates."One $units[$from_cur_nr] is ".calc_exchange_rate(1, $units[$from_cur_nr], $units[$to_cur_nr])." $units[$to_cur_nr]\n"; |
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} |
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} |
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return $exchange_rates."This may change a bit with the stock markets but don't expect it to be much."; |
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} |
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} |
