From 379a01dba1fd98ed632d495c7e6ca47244f8c60e Mon Sep 17 00:00:00 2001
From: "Steinar H. Gunderson" <sesse@debian.org>
Date: Sun, 9 Dec 2007 15:33:04 +0100
Subject: [PATCH] Add a "dry run" mode to recalc-single-result, for easier
 testing.

---
 recalc-single-result.pl | 28 +++++++++++++++++++---------
 1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/recalc-single-result.pl b/recalc-single-result.pl
index 8c6923b..efcd4c7 100755
--- a/recalc-single-result.pl
+++ b/recalc-single-result.pl
@@ -5,11 +5,19 @@ use DBI;
 use CGI;
 use CGI::Carp qw(fatalsToBrowser);
 require 'foosball.pm';
+no warnings 'once';
+
+my $dryrun = 0;
+if (defined($ARGV[0])) {
+	$dryrun = 1;
+	$foosball::initial_rd = $ARGV[0];
+	$foosball::c = $ARGV[1];
+}
 
 my $dbh = foosball::db_connect();
 $dbh->{AutoCommit} = 0;
 
-$dbh->do('delete from single_rating');
+$dbh->do('delete from single_rating') unless $dryrun;
 
 my %ratings = ();
 my $q = $dbh->prepare('select *,extract(epoch from gametime) as eptime from single_results order by gametime');
@@ -44,19 +52,21 @@ while (my $ref = $q->fetchrow_hashref) {
 
 	$cll += log($likelihood);
 
-	printf("%-10s - %-10s: %u - %u, new ratings %u/%u %u/%u [$likelihood]\n",
-		$ref->{'username1'}, $ref->{'username2'}, $ref->{'score1'},
-		$ref->{'score2'}, $newr1, $newrd1, $newr2, $newrd2);
-	$dbh->do('insert into single_rating values (?,?,?,?,?)', undef,
-		$ref->{'username1'}, $ref->{'gametime'}, $newr1, $newrd1, $newr1-$rating1);
-	$dbh->do('insert into single_rating values (?,?,?,?,?)', undef,
-		$ref->{'username2'}, $ref->{'gametime'}, $newr2, $newrd2, $newr2-$rating2);
+	unless ($dryrun) {
+		printf("%-10s - %-10s: %u - %u, new ratings %u/%u %u/%u [$likelihood]\n",
+			$ref->{'username1'}, $ref->{'username2'}, $ref->{'score1'},
+			$ref->{'score2'}, $newr1, $newrd1, $newr2, $newrd2);
+		$dbh->do('insert into single_rating values (?,?,?,?,?)', undef,
+			$ref->{'username1'}, $ref->{'gametime'}, $newr1, $newrd1, $newr1-$rating1);
+		$dbh->do('insert into single_rating values (?,?,?,?,?)', undef,
+			$ref->{'username2'}, $ref->{'gametime'}, $newr2, $newrd2, $newr2-$rating2);
+	}
 
 	$ratings{$ref->{'username1'}} = [ $newr1, $newrd1, $ref->{'eptime'} ];
 	$ratings{$ref->{'username2'}} = [ $newr2, $newrd2, $ref->{'eptime'} ];
 }
 
-$dbh->commit;
+$dbh->commit unless $dryrun;
 $dbh->disconnect;
 
 printf "\nCombined negative log-likelihood (smaller value means a better model): %f\n",
-- 
2.39.2