From 6c6fe1b121e5e9613223ee96d4ef342f0931b875 Mon Sep 17 00:00:00 2001
From: Marius Gavrilescu <marius@ieval.ro>
Date: Tue, 8 Dec 2015 11:51:52 +0200
Subject: [PATCH] Autostart/autostop contests via s-maxage

---
 lib/Plack/App/Gruntmaster.pm | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/lib/Plack/App/Gruntmaster.pm b/lib/Plack/App/Gruntmaster.pm
index c197f85..c941578 100644
--- a/lib/Plack/App/Gruntmaster.pm
+++ b/lib/Plack/App/Gruntmaster.pm
@@ -7,6 +7,7 @@ our $VERSION = '5999.000_001';
 use Encode qw/encode decode/;
 use File::Slurp qw/read_file/;
 use JSON::MaybeXS qw/encode_json/;
+use List::Util qw/min/;
 use PerlX::Maybe;
 use Scope::Upper qw/unwind SUB UP/;
 use Web::Simple;
@@ -55,14 +56,14 @@ sub admin   { remote_user && remote_user->{admin} }
 sub redirect { [301, ['X-Forever' => 1, 'Cache-Control' => 'public, max-age=86400', 'Location' => $_[0]], []] }
 sub reply    { [200, ['Content-Type' => 'text/plain; charset=utf-8'], \@_] }
 sub response {
-	my ($template, $title, $params, $maxage) = @_;
+	my ($template, $title, $params, $maxage, $smaxage) = @_;
 	unless ($params) {
 		$params = $title;
 		$title = 'No title';
 	}
 	$params->{time} = time;
 	$params->{args} = {%_};
-	bless {template => $template, title => $title, params => $params, maxage => ($maxage // 3600)}, __PACKAGE__.'::Response'
+	bless {template => $template, title => $title, params => $params, maxage => ($maxage // 3600), maybe smaxage => $smaxage}, __PACKAGE__.'::Response'
 }
 
 sub forbid {
@@ -97,7 +98,9 @@ sub dispatch_request{
 			response_filter {
 				my ($r) = @_;
 				return $r if ref $r ne 'Plack::App::Gruntmaster::Response';
-				my @hdrs = ('X-Forever' => 1, 'Cache-Control' => "$privacy, max-age=$r->{maxage}");
+				my $smaxage = $r->{smaxage} ? ", s-maxage=$r->{smaxage}" : '';
+				my @hdrs = ('Cache-Control' => "$privacy$smaxage, max-age=$r->{maxage}");
+				push @hdrs, 'X-Forever' => 1 unless $smaxage;
 				push @hdrs, Vary => 'Authorization' if $privacy eq 'private';
 				return [200, ['Content-Type' => 'application/json; charset=utf-8', @hdrs], [encode_json $r->{params}]] if $format eq 'json';
 				my $ret = render $r->{template}, 'en', title => $r->{title}, %{$r->{params}};
@@ -125,7 +128,13 @@ sub dispatch_request{
 		sub (/ct/:contest/log/st) { redirect "/st/$_{contest}" },
 
 		sub (/us/)                                        { response us => 'Users', {us => user_list} },
-		sub (/ct/  + ?:owner~)                            { response ct => 'Contests', {ct => contest_list(%_)}, 300 },
+		sub (/ct/  + ?:owner~)                            {
+			my $cts = contest_list(%_);
+			my $first_event = min
+			  map ({ $_->{start} } grep { !$_->{started} } @$cts),
+			  map ({ $_->{stop}  } grep {  $_->{started} && !$_->{finished}} @$cts);
+			response ct => 'Contests', {ct => $cts}, 300, $first_event ? ($first_event - time) : ();
+		},
 		sub (/log/ + ?:contest~&:owner~&:page~&:problem~&:private~&:result~) {
 			forbid $_{private};
 			my ($jobs, $pageinfo) = job_list(%_);
@@ -144,7 +153,10 @@ sub dispatch_request{
 		},
 		sub (/ct/:contest) {
 			my $contest = contest_entry $_{contest};
-			response ct_entry => $contest->{name}, $contest, 60
+			my $smaxage;
+			$smaxage = $contest->{start} - time if !$contest->{started};
+			$smaxage = $contest->{stop}  - time if  $contest->{started} && !$contest->{finished};
+			response ct_entry => $contest->{name}, $contest, 60, $smaxage ? ($smaxage) : ()
 		},
 		sub (/log/:job)    {
 			my $job = job_entry $_{job};
-- 
2.30.2