package foosball;
+our $initial_rating = 1500.0;
+our $initial_rd = 350.0;
+
sub db_connect {
my $dbh = DBI->connect("dbi:Pg:dbname=foosball;host=127.0.0.1", "foosball", "cleanrun", {AutoCommit => 0});
$dbh->{RaiseError} = 1;
$rd = apply_aging($rd, $age / 86400.0);
if (!defined($rating)) {
- $rating = 1500;
- $rd = 350;
+ $rating = $initial_rating;
+ $rd = $initial_rd;
}
return ($rating, $rd);
$rd = apply_aging($rd, $age / 86400.0);
if (!defined($rating)) {
- $rating = 1500;
- $rd = 350;
+ $rating = $initial_rating;
+ $rd = $initial_rd;
}
return ($rating, $rd);
return if ($count > 0);
$dbh->do('INSERT INTO users (username) VALUES (?)',
undef, $username);
- $dbh->do('INSERT INTO single_rating (username,ratetime,rating,rd) VALUES (?,CURRENT_TIMESTAMP,1500.0,350.0)',
- undef, $username);
- $dbh->do('INSERT INTO double_rating (username,ratetime,rating,rd) VALUES (?,CURRENT_TIMESTAMP,1500.0,350.0)',
- undef, $username);
+ $dbh->do('INSERT INTO single_rating (username,ratetime,rating,rd) VALUES (?,CURRENT_TIMESTAMP,?,?)',
+ undef, $username, $initial_rating, $initial_rd);
+ $dbh->do('INSERT INTO double_rating (username,ratetime,rating,rd) VALUES (?,CURRENT_TIMESTAMP,?,?)',
+ undef, $username, $initial_rating, $initial_rd);
return $dbh;
}
sub apply_aging {
my ($rd, $age) = @_;
$rd = sqrt($rd*$rd + $c * $c * ($age / 86400.0));
- $rd = 350.0 if ($rd > 350.0);
+ $rd = $initial_rd if ($rd > $initial_rd);
return $rd;
}