Import the web frontend, picking out data from the database.

diff --git a/www/index.pl b/www/index.pl
new file mode 100755 (executable)
index 0000000..0967b82
--- /dev/null
+++ b/www/index.pl
@@ -0,0 +1,211 @@
+#! /usr/bin/perl
+use strict;
+use warnings;
+no warnings qw(once);
+use CGI;
+use CGI::Carp qw( fatalsToBrowser );
+use DBI;
+use POSIX;
+use Devel::Peek;
+use locale;
+require '../config.pm';
+
+my $dbh = DBI->connect($config::local_connstr, $config::local_username, $config::local_password)
+       or die "connect: " . $DBI::errstr;
+$dbh->{AutoCommit} = 0;
+$dbh->{RaiseError} = 1;
+
+my $trials = 25_000;
+
+binmode STDOUT, ':utf8';
+
+my %players = ();
+my %ratings = ();
+my @matches = ();
+
+sub sanitize {
+       $_ = shift;
+       y/ \t\n<>&/_/;
+       return $_;
+}
+
+sub color {
+       my $x = shift;
+       return int(255.0 * ($x ** (1.80)));
+}
+
+sub make_table {
+       my $used_ratings = shift;
+
+       print <<"EOF";
+
+    <table>
+      <tr>
+        <th></th>
+EOF
+
+       POSIX::setlocale(&POSIX::LC_ALL, 'C');
+
+       my $tmpnam = POSIX::tmpnam();
+       open MCCALC, ">", $tmpnam
+               or die "$tmpnam: $!";
+
+       printf MCCALC "%d\n", scalar keys %players;
+
+       for my $id (keys %players) {
+               if (exists($used_ratings->{$id})) {
+                       printf MCCALC "%s %f\n", $id, $used_ratings->{$id};
+               } else {
+                       printf MCCALC "%s %f\n", $id, 1500.0;
+               }
+       }
+
+       for my $match (@matches) {
+               printf MCCALC "%s %s %d %d\n", $match->[0], $match->[1], $match->[2], $match->[3];
+       }
+       close MCCALC;
+
+       POSIX::setlocale(&POSIX::LC_ALL, 'nb_NO.UTF-8');
+
+       my %prob = ();
+
+       open MCCALC, "$config::base_dir/mcwordfeud $trials < $tmpnam |"
+               or die "mccalc: $!";
+       while (<MCCALC>) {
+               chomp;
+               my @x = split /\s+/;
+               my $id = $x[0];
+               my $player = $players{$id};
+               $prob{$player} = [ @x[1..$#x] ];
+       }
+       close MCCALC;
+       #unlink $tmpnam;
+
+       my $num_games = scalar keys %prob;
+       for my $i (1..$num_games) {
+               print "        <th>$i.</th>\n";
+       }
+       print "        <th>NEDRYKK</th>\n";
+       print "      </tr>\n";
+
+       for my $player (sort { $a cmp $b } keys %prob) {
+               print "      <tr>\n";
+               print "        <th>$player</th>\n";
+
+               for my $i (1..$num_games) {
+                       my $pn = $prob{$player}->[$i - 1] / $trials;
+
+                       my $r = color(1.0 - $pn / 3);
+                       my $g = color(1.0 - $pn / 3);
+                       my $b = color(1.0);
+
+                       if ($i == 1) {
+                               ($g, $b) = ($b, $g);
+                       } elsif ($i >= $num_games - 1) {
+                               ($r, $b) = ($b, $r);
+                       }
+
+                       printf "        <td style=\"background-color: rgb($r, $g, $b)\">%.1f%%</td>\n", $pn * 100.0;
+               }
+
+               {
+                       my $pn = ($prob{$player}->[$num_games - 1] + $prob{$player}->[$num_games - 2]) / $trials;
+
+                       my $r = color(1.0);
+                       my $g = color(1.0 - $pn / 3);
+                       my $b = color(1.0 - $pn / 3);
+                       printf "        <td style=\"background-color: rgb($r, $g, $b)\">%.1f%%</td>\n", $pn * 100.0;
+               }
+               print "      </tr>\n";
+       }
+
+       print << "EOF";
+    </table>
+EOF
+}
+
+# Get players and ratings
+my $season = 18;
+my $division = 1;
+my $subdivision = 1;
+
+my $q = $dbh->prepare('SELECT fotballdeltagere.id,fotballdeltagere.navn,rating FROM fotballdeltagere JOIN fotballserier ON fotballdeltagere.serie=fotballserier.nr JOIN ratings ON fotballdeltagere.id=ratings.id AND sesong=? AND divisjon=? AND avdeling=?');
+$q->execute($season, $division, $subdivision);
+
+while (my $ref = $q->fetchrow_hashref) {
+       my $id = $ref->{'id'};
+       $players{$id} = sanitize($ref->{'navn'});
+       $ratings{$id} = $ref->{'rating'};
+}
+$q->finish;
+
+$q = $dbh->prepare('
+SELECT
+  d1.id AS p1, d2.id AS p2, maalfor AS score1, maalmot AS score2
+FROM fotballresultater r
+  JOIN fotballserier s ON r.serie=s.nr
+  JOIN fotballdeltagere d1 ON r.lagrecno=d1.nr AND r.serie=d1.serie
+  JOIN fotballdeltagere d2 ON r.motstander=d2.nr AND r.serie=d2.serie
+WHERE
+  sesong=? AND divisjon=? AND avdeling=?
+  AND lagrecno > motstander
+');
+$q->execute($season, $division, $subdivision);
+
+while (my $ref = $q->fetchrow_hashref) {
+       push @matches, [ $ref->{'p1'}, $ref->{'p2'}, $ref->{'score1'}, $ref->{'score2'} ];
+}
+$q->finish;
+
+print CGI->header(-type=>'text/html; charset=utf-8', -expires=>'Thu, 01 Dec 1994 16:00:00 GMT');
+print <<"EOF";
+<html>
+  <head>
+    <title>WLoH-plasseringsannsynlighetsberegning</title>
+    <style type="text/css">
+body {
+       color: black;
+       background: white;
+       font-family: sans-serif;
+}
+table {
+       border-collapse: collapse;
+       border: 1px solid black;
+}
+td, th {
+       border: 1px solid black;
+       padding: 5px;
+}
+td {
+       text-align: right;
+}
+    </style>
+  </head>
+  <body>
+    <h1>WLoH-plasseringsannsynlighetsberegning</h1>
+
+    <p>Beregningen tar ikke hensyn til ujevn spillestyrke, ting som er sagt i forumet e.l.;
+      den antar at samtlige uspilte kamper trekkes fra en normalfordeling med standardavvik
+      82,9 poeng. Sannsynlighetene kan summere til andre tall enn 100% pga. avrunding.
+      Tallene vil variere litt fra gang til gang fordi utregningen skjer ved randomisering.</p>
+
+    <p>Andre divisjoner enn 1. divisjon kommer etter hvert.</p>
+
+    <p>Spillerne er sortert etter nick.</p>
+EOF
+
+make_table({});
+
+print <<"EOF";
+    <p>Under er en variant som pr&oslash;ver &aring; ta relativ spillestyrke med i betraktningen.
+      Disse er basert p&aring; WLoH-data opp til og med sesong 17 (takk til Lobotommy for tilgang
+      til disse!), men modellen er forel&oslash;pig ikke fullstendig tunet.</p>
+EOF
+
+make_table(\%ratings);
+
+print << "EOF";
+    </table>
+  </body>
+</html>
+EOF