maps/perl/bank.ext

#! perl

# The international bank script. There are five commands one can
# give the banker in-game:
# - help, will show the usage information
# - deposit, can deposit a certain amount of a given currency unit
# - withdraw, can give out a certain amount of a given currency unit
#      provided, the bank account has this amount of money
# - exchange, will exchange between imperials and platinum coins
# - balance, simply shows how much money one has on his/her account.
#
# TODO:
# - Continue modularising
#  * transaction()
# - Comment more steps

# The units are being used in each sub so they are declared globally.
my %unit = (
   silver => 1,
   gold => 10,
   platina => 50, 
   imperial => 10000, 
); 

# Subroutine just to calculate exchange rates, I purposefully left in the
# exchange rates for imperial => imperial, platina => platina, etc.
sub calc_exchange_rate {
   my ($value, $from_cur, $to_cur) = @_;

   if ($unit{$from_cur} and $unit{$to_cur}) {
      return $value * $unit{$from_cur} / $unit{$to_cur};
   }
}

# Calculates and returns how much money someone has starting with the
# highest value currency going down. Think of it like having the date
# and time in the format of 2006-05-19 03:21:31 UTC instead of 1148001691
# seconds since 1970-01-01 00:00:00 UTC.
sub balance {
   my ($who) = @_;
   my $balance = $who->{bank_balance};

   if (!$balance or int($balance) == 0) {
      return "Sorry, you have no balance.";
   } else {

      my $imperials = calc_exchange_rate($balance, "silver", "imperial");
      my $platinum = calc_exchange_rate($imperials - int ($imperials), "imperial", "platina");
      my $gold = calc_exchange_rate($platinum - int ($platinum), "platina", "gold");
      my $silver = calc_exchange_rate($gold - int ($gold), "gold", "silver");

      return "You have ".int($imperials)." imperials, ".int($platinum)." platinum, ".int($gold)." gold and about ".int($silver)." silver coins.";
   }
}

sub transaction {
   my ($who, $action, $amount, $currency) = @_;
   my $pay = $amount * %unit->{$currency};

   # First check for possible overflow and user stupidity
   if ($amount > 10000) {
      return "Sorry, we do not handle more than 10000 units for one ".$action.".";
   } elsif ($amount == 0) {
      return "You can not ".$action." nothing.";
   } elsif ($amount < 0) {
      return "You can not ".$action." negative values.";
   } else {
      # Here we handle the transactions 
      if ($action eq "deposit") {
         if ($who->pay_amount ($pay)) {
            $who->{bank_balance} += $pay;
            return "$amount $currency received.";
         } else {
            return "You don't have enough money with you.";
         }
      } elsif ($action eq "withdraw") {
         if ($who->{bank_balance} - $pay > 0) {
            $who->{bank_balance} -= $pay;
            if ($currency eq "imperial") {
               my $money = cf::object::new ("imperial");
               $money->set_property (1, 24, $amount);
               $money->insert_in_ob ($who);
            } else {
               my $money = cf::object::new ($currency."coin");
               $money->set_property (1, 24, $amount);
               $money->insert_in_ob ($who);
            }
            return "Withdrew $amount $currency";
         }
      }
   }
}

sub on_say {
   my ($event, $ob, $who, $msg) = @_;
   my ($cmd, $arguments) = split /\s+/, $msg, 2;
   my ($amount, $currency) = split /\s+/, $arguments, 2;
   my $service_charge = 5;
   my @units = sort keys %unit;
   my $units = join ", ", @units;
   my $fees = - ($service_charge / 100) + 1;

   if ($cmd eq "balance") {
      $who->message ($ob->name." says: ".balance ($who), cf::NDI_WHITE);
   }

   elsif ($cmd eq "deposit" and $currency) {
      $who->message ($ob->name." says: ".transaction($who, "deposit", $amount, $currency), cf::NDI_WHITE);
      $who->message ($ob->name." says: ".balance ($who), cf::NDI_WHITE);
   } elsif ($cmd eq "deposit" and $amount and $currency eq "") {
      $who->message ($ob->name." says: Deposit $amount of what: ".$units.".", cf::NDI_WHITE);
   } elsif ($cmd eq "deposit" and $amount eq "" and $currency eq "") {
      $who->message ($ob->name." says: How much do you want to deposit?", cf::NDI_WHITE);
   }

   elsif ($cmd eq "withdraw" and $currency) {
      $who->message ($ob->name." says: ".transaction($who, "withdraw", $amount, $currency), cf::NDI_WHITE);
      $who->message ($ob->name." says: ".balance ($who), cf::NDI_WHITE);
   } elsif ($cmd eq "withdraw" and $amount and $currency eq "") {
      $who->message ($ob->name." says: Withdraw $amount of what: ".$units.".", cf::NDI_WHITE);
   } elsif ($cmd eq "withdraw" and $amount eq "" and $currency eq "") {
      $who->message ($ob->name." says: How much do you want to withdraw?", cf::NDI_WHITE);
   }

   elsif ($cmd eq "help" || "yes") {
      $who->message ($ob->name." says: ".help($arguments), cf::NDI_WHITE);
   }
}

sub help {
   my ($command) = @_;

   if ($command eq "") {
      return "You can:
      deposit <amount> <currency>
      withdraw <amount> <currency>
      balance
      exchange <amount> <direction>
      help <topic>";
   } elsif ($command eq "deposit") {
      return "You can deposit some of the money you don't currently use in our bank. To do this, ask me to:
      deposit <amount> <currency>\nSee help exchange for our currencies.";
   } elsif ($command eq "withdraw") {
      return "To get the money you stored in our system back, just say:
      withdraw <amount> <currency>";
   } elsif ($command eq "balance") {
      return "I can tell you how much money you are saving in our bank, just ask me about your balance.";
   } elsif ($command eq "exchange") {
      return "We exchange between imperial notes and platinum coins at a very low price. To change from platinum to imperials, say:
      exchange <amount> platina\nTo change from imperials to platinum, say:
      exchange <amount> imperial\nWe currently only exchange between these two currencies. If you want to know more about exchange rates, ask me:
      help exchange rates\nThanks for using our bank.";
   } elsif ($command eq "exchange rates") {
      return "Here is a list of exchange rates:\n"
      ."imperial => ".calc_exchange_rate(1, "imperial", "platina")." platina\n"
      ."imperial => ".calc_exchange_rate(1, "imperial", "gold")." gold\n"
      ."imperial => ".calc_exchange_rate(1, "imperial", "silver")." silver\n"

      ."platina => ".calc_exchange_rate(1, "platina", "gold")." gold\n"
      ."platina => ".calc_exchange_rate(1, "platina", "silver")." silver\n"

      ."gold => ".calc_exchange_rate(1, "gold", "silver")." silver\nThis may change a bit with the stock markets but don't expect it to be much.";
   }
}
Revision:	1.2
Committed:	Fri May 19 14:54:55 2006 UTC (18 years ago) by pippijn
Branch:	MAIN
Changes since 1.1:	+21 -63 lines
Log Message:	Shortened calc_exchange_rate
#	User	Rev	Content
1	pippijn	1.1	#! perl
2
3			# The international bank script. There are five commands one can
4			# give the banker in-game:
5			# - help, will show the usage information
6			# - deposit, can deposit a certain amount of a given currency unit
7			# - withdraw, can give out a certain amount of a given currency unit
8			# provided, the bank account has this amount of money
9			# - exchange, will exchange between imperials and platinum coins
10			# - balance, simply shows how much money one has on his/her account.
11			#
12			# TODO:
13			# - Continue modularising
14	pippijn	1.2	# * transaction()
15	pippijn	1.1	# - Comment more steps
16
17			# The units are being used in each sub so they are declared globally.
18	pippijn	1.2	my %unit = (
19	pippijn	1.1	silver => 1,
20			gold => 10,
21			platina => 50,
22			imperial => 10000,
23			);
24
25			# Subroutine just to calculate exchange rates, I purposefully left in the
26			# exchange rates for imperial => imperial, platina => platina, etc.
27	pippijn	1.2	sub calc_exchange_rate {
28	pippijn	1.1	my ($value, $from_cur, $to_cur) = @_;
29
30	pippijn	1.2	if ($unit{$from_cur} and $unit{$to_cur}) {
31			return $value * $unit{$from_cur} / $unit{$to_cur};
32	pippijn	1.1	}
33			}
34
35			# Calculates and returns how much money someone has starting with the
36			# highest value currency going down. Think of it like having the date
37			# and time in the format of 2006-05-19 03:21:31 UTC instead of 1148001691
38			# seconds since 1970-01-01 00:00:00 UTC.
39	pippijn	1.2	sub balance {
40	pippijn	1.1	my ($who) = @_;
41			my $balance = $who->{bank_balance};
42
43			if (!$balance or int($balance) == 0) {
44			return "Sorry, you have no balance.";
45			} else {
46
47			my $imperials = calc_exchange_rate($balance, "silver", "imperial");
48			my $platinum = calc_exchange_rate($imperials - int ($imperials), "imperial", "platina");
49			my $gold = calc_exchange_rate($platinum - int ($platinum), "platina", "gold");
50			my $silver = calc_exchange_rate($gold - int ($gold), "gold", "silver");
51
52			return "You have ".int($imperials)." imperials, ".int($platinum)." platinum, ".int($gold)." gold and about ".int($silver)." silver coins.";
53			}
54			}
55
56	pippijn	1.2	sub transaction {
57	pippijn	1.1	my ($who, $action, $amount, $currency) = @_;
58	pippijn	1.2	my $pay = $amount * %unit->{$currency};
59	pippijn	1.1
60			# First check for possible overflow and user stupidity
61			if ($amount > 10000) {
62			return "Sorry, we do not handle more than 10000 units for one ".$action.".";
63			} elsif ($amount == 0) {
64			return "You can not ".$action." nothing.";
65			} elsif ($amount < 0) {
66			return "You can not ".$action." negative values.";
67			} else {
68			# Here we handle the transactions
69			if ($action eq "deposit") {
70			if ($who->pay_amount ($pay)) {
71			$who->{bank_balance} += $pay;
72			return "$amount $currency received.";
73			} else {
74			return "You don't have enough money with you.";
75			}
76			} elsif ($action eq "withdraw") {
77			if ($who->{bank_balance} - $pay > 0) {
78			$who->{bank_balance} -= $pay;
79			if ($currency eq "imperial") {
80			my $money = cf::object::new ("imperial");
81			$money->set_property (1, 24, $amount);
82			$money->insert_in_ob ($who);
83			} else {
84			my $money = cf::object::new ($currency."coin");
85			$money->set_property (1, 24, $amount);
86			$money->insert_in_ob ($who);
87			}
88			return "Withdrew $amount $currency";
89			}
90			}
91			}
92			}
93
94			sub on_say {
95			my ($event, $ob, $who, $msg) = @_;
96			my ($cmd, $arguments) = split /\s+/, $msg, 2;
97			my ($amount, $currency) = split /\s+/, $arguments, 2;
98			my $service_charge = 5;
99	pippijn	1.2	my @units = sort keys %unit;
100	pippijn	1.1	my $units = join ", ", @units;
101			my $fees = - ($service_charge / 100) + 1;
102
103			if ($cmd eq "balance") {
104			$who->message ($ob->name." says: ".balance ($who), cf::NDI_WHITE);
105			}
106
107	pippijn	1.2	elsif ($cmd eq "deposit" and $currency) {
108	pippijn	1.1	$who->message ($ob->name." says: ".transaction($who, "deposit", $amount, $currency), cf::NDI_WHITE);
109			$who->message ($ob->name." says: ".balance ($who), cf::NDI_WHITE);
110	pippijn	1.2	} elsif ($cmd eq "deposit" and $amount and $currency eq "") {
111	pippijn	1.1	$who->message ($ob->name." says: Deposit $amount of what: ".$units.".", cf::NDI_WHITE);
112			} elsif ($cmd eq "deposit" and $amount eq "" and $currency eq "") {
113			$who->message ($ob->name." says: How much do you want to deposit?", cf::NDI_WHITE);
114			}
115
116	pippijn	1.2	elsif ($cmd eq "withdraw" and $currency) {
117	pippijn	1.1	$who->message ($ob->name." says: ".transaction($who, "withdraw", $amount, $currency), cf::NDI_WHITE);
118			$who->message ($ob->name." says: ".balance ($who), cf::NDI_WHITE);
119	pippijn	1.2	} elsif ($cmd eq "withdraw" and $amount and $currency eq "") {
120	pippijn	1.1	$who->message ($ob->name." says: Withdraw $amount of what: ".$units.".", cf::NDI_WHITE);
121			} elsif ($cmd eq "withdraw" and $amount eq "" and $currency eq "") {
122			$who->message ($ob->name." says: How much do you want to withdraw?", cf::NDI_WHITE);
123			}
124
125			elsif ($cmd eq "help" \|\| "yes") {
126			$who->message ($ob->name." says: ".help($arguments), cf::NDI_WHITE);
127			}
128			}
129
130	pippijn	1.2	sub help {
131	pippijn	1.1	my ($command) = @_;
132
133			if ($command eq "") {
134			return "You can:
135			deposit <amount> <currency>
136			withdraw <amount> <currency>
137			balance
138			exchange <amount> <direction>
139			help <topic>";
140			} elsif ($command eq "deposit") {
141			return "You can deposit some of the money you don't currently use in our bank. To do this, ask me to:
142			deposit <amount> <currency>\nSee help exchange for our currencies.";
143			} elsif ($command eq "withdraw") {
144			return "To get the money you stored in our system back, just say:
145			withdraw <amount> <currency>";
146			} elsif ($command eq "balance") {
147			return "I can tell you how much money you are saving in our bank, just ask me about your balance.";
148			} elsif ($command eq "exchange") {
149			return "We exchange between imperial notes and platinum coins at a very low price. To change from platinum to imperials, say:
150			exchange <amount> platina\nTo change from imperials to platinum, say:
151			exchange <amount> imperial\nWe currently only exchange between these two currencies. If you want to know more about exchange rates, ask me:
152			help exchange rates\nThanks for using our bank.";
153			} elsif ($command eq "exchange rates") {
154	pippijn	1.2	return "Here is a list of exchange rates:\n"
155			."imperial => ".calc_exchange_rate(1, "imperial", "platina")." platina\n"
156			."imperial => ".calc_exchange_rate(1, "imperial", "gold")." gold\n"
157			."imperial => ".calc_exchange_rate(1, "imperial", "silver")." silver\n"
158	pippijn	1.1
159	pippijn	1.2	."platina => ".calc_exchange_rate(1, "platina", "gold")." gold\n"
160			."platina => ".calc_exchange_rate(1, "platina", "silver")." silver\n"
161	pippijn	1.1
162	pippijn	1.2	."gold => ".calc_exchange_rate(1, "gold", "silver")." silver\nThis may change a bit with the stock markets but don't expect it to be much.";
163	pippijn	1.1	}
164			}