package Gruntmaster::Data;
use 5.014;
use warnings;
use parent qw/Exporter/;
our $VERSION = '5999.000_016';
our @EXPORT = qw/dbinit purge db user_list user_entry problem_list problem_entry contest_list contest_entry contest_has_problem job_list job_entry create_job standings update_status rerun_job rerun_problem take_job finish_job open_problem/;
our @EXPORT_OK = @EXPORT;
use JSON::MaybeXS qw/decode_json/;
use HTTP::Tiny;
use PerlX::Maybe qw/maybe/;
use DBI;
use DBIx::Simple;
use List::Util qw/sum/;
use SQL::Abstract;
use constant PROBLEM_PUBLIC_COLUMNS => [qw/id author writer level name owner private timeout olimit value/];
use constant JOBS_PER_PAGE => 50;
my %statements = (
user_list_sth => 'SELECT * FROM user_list LIMIT 200',
user_entry_sth => 'SELECT * FROM user_data WHERE id = ?',
problem_status_sth => 'SELECT problem,solved FROM problem_status WHERE owner = ?',
contest_status_sth => 'SELECT contest,score,rank FROM contest_status WHERE owner = ?',
contest_list_sth => 'SELECT * FROM contest_entry',
contest_entry_sth => 'SELECT * FROM contest_entry WHERE id = ?',
contest_has_problem_sth => 'SELECT EXISTS(SELECT 1 FROM contest_problems WHERE contest = ? AND problem = ?)',
opens_sth => 'SELECT problem,owner,time FROM opens WHERE contest = ?',
problem_entry_sth => 'SELECT ' . (join ',', @{PROBLEM_PUBLIC_COLUMNS()}, 'statement', 'solution') . ' FROM problems WHERE id = ?',
limits_sth => 'SELECT format,timeout FROM limits WHERE problem = ?',
job_entry_sth => 'SELECT * FROM job_entry WHERE id = ?',
rerun_problem_sth => 'UPDATE jobs SET daemon=NULL,result=-2,result_text=NULL,results=NULL,errors=NULL WHERE problem = ?',
rerun_job_sth => 'UPDATE jobs SET daemon=NULL,result=-2,result_text=NULL,results=NULL,errors=NULL WHERE id = ?',
take_job_sth => 'UPDATE jobs SET daemon=? WHERE id = (SELECT id FROM jobs WHERE daemon IS NULL LIMIT 1 FOR UPDATE) RETURNING id',
);
our $db;
sub db () { $db }
sub dbinit {
$db = DBIx::Simple->new(@_);
$db->keep_statements = 100;
};
sub purge;
sub _query {
my ($stat, @extra) = @_;
$db->query($statements{$stat}, @extra)
}
my (%name_cache, %name_cache_time);
use constant NAME_CACHE_MAX_AGE => 5;
sub _object_name {
my ($table, $id) = @_;
$name_cache_time{$table} //= 0;
if (time - $name_cache_time{$table} > NAME_CACHE_MAX_AGE) {
$name_cache_time{$table} = time;
$name_cache{$table} = {};
$name_cache{$table} = $db->select($table, 'id,name')->map;
}
$name_cache{$table}{$id}
}
sub _add_names ($) { ## no critic (ProhibitSubroutinePrototypes)
my ($el) = @_;
return unless defined $el;
if (ref $el eq 'ARRAY') {
&_add_names ($_) for @$el ## no critic (ProhibitAmpersandSigils)
} else {
for my $object (qw/contest owner problem/) {
my $table = $object eq 'owner' ? 'users' : "${object}s";
$el->{"${object}_name"} = _object_name $table, $el->{$object} if defined $el->{$object}
}
}
$el
}
sub user_list { scalar _query('user_list_sth')->hashes }
sub user_entry {
my ($id) = @_;
my $ret = _query('user_entry_sth', $id)->hash;
$ret->{problems} = _add_names _query('problem_status_sth', $id)->hashes;
$ret->{contests} = _add_names _query('contest_status_sth', $id)->hashes;
$ret;
}
sub problem_list {
my (%args) = @_;
my @columns = @{PROBLEM_PUBLIC_COLUMNS()};
push @columns, 'solution' if $args{solution};
my %where;
$where{private} = 0 unless $args{contest} || $args{private};
$where{'cp.contest'} = $args{contest} if $args{contest};
$where{owner} = $args{owner} if $args{owner};
my $table = $args{contest} ? 'problems JOIN contest_problems cp ON cp.problem = id' : 'problems';
_add_names $db->select(\$table, \@columns, \%where, 'name')->hashes
}
sub problem_entry {
my ($id, $contest) = @_;
$contest = contest_entry ($contest) if $contest;
my $ret = _add_names _query(problem_entry_sth => $id)->hash;
my $limits = _query(limits_sth => $id)->hashes;
$ret->{limits} = $limits if @$limits;
if ($contest) {
$ret->{contest_start} = $contest->{start};
$ret->{contest_stop} = $contest->{stop};
delete $ret->{solution}
}
$ret
}
sub contest_list { _add_names _query('contest_list_sth')->hashes }
sub contest_entry { _add_names _query(contest_entry_sth => $_[0])->hash }
sub contest_has_problem { _query('contest_has_problem_sth', @_[0, 1])->flat }
sub job_list {
my (%args) = @_;
$args{page} = int ($args{page} // 1);
my %where = (
maybe contest => $args{contest},
maybe owner => $args{owner},
maybe problem => $args{problem},
maybe result => $args{result},
);
$where{private} = 0 unless $args{private};
my $rows = $db->select('job_entry', 'COUNT(*)', \%where)->list;
my $pages = int (($rows + JOBS_PER_PAGE - 1) / JOBS_PER_PAGE);
my ($stmt, @bind) = $db->abstract->select('job_entry', '*', \%where, {-desc => 'id'});
my $jobs = _add_names $db->query("$stmt LIMIT " . JOBS_PER_PAGE . ' OFFSET ' . ($args{page} - 1) * JOBS_PER_PAGE, @bind)->hashes;
my $pageinfo = {
current_page => $args{page},
last_page => $pages,
($args{page} - 1) ? (previous_page => $args{page} - 1) : (),
($args{page} < $pages) ? (next_page => $args{page} + 1) : (),
};
wantarray ? ($jobs, $pageinfo) : $jobs;
}
sub job_entry {
my $ret = _add_names _query(job_entry_sth => $_[0])->hash;
$ret->{results} = decode_json $ret->{results} if $ret->{results};
$ret
}
sub create_job {
my (%args) = @_;
$db->update('users', {lastjob => time}, {id => $args{owner}});
purge '/log/';
scalar $db->insert('jobs', \%args, {returning => 'id'})->list
}
sub _calc_score {
my ($mxscore, $time, $tries, $totaltime) = @_;
my $score = $mxscore;
$time = 300 if $time > $totaltime; # uncoverable branch true does not happen anymore (only possible if opens are broken)
$score = ($totaltime - $time) / $totaltime * $score;
$score -= $tries / 10 * $mxscore;
$score = $mxscore * 3 / 10 if $score < $mxscore * 3 / 10;
int $score + 0.5
}
sub standings {
my ($ct) = @_;
my @problems = sort { $a->{value} <=> $b->{value} } @{problem_list contest => $ct};
my %values = map { $_->{id} => $_->{value} } @problems;
$ct = contest_entry $ct;
my (%scores, %tries, %opens);
my $opens = _query(opens_sth => $ct->{id});
while ($opens->into(my ($problem, $owner, $time))) {
$opens{$problem, $owner} = $time;
}
my $jobs = $db->select('job_entry', '*', {contest => $ct->{id}}, 'id');
while (my $job = $jobs->hash) {
my $open = $opens{$job->{problem}, $job->{owner}} // $ct->{start};
my $time = $job->{date} - $open;
next if $time < 0; # uncoverable branch true job sent before contest is deprecated
my $value = $values{$job->{problem}};
my $factor = $job->{result} ? 0 : 1;
$factor = $1 / 100 if $job->{result_text} =~ /^(\d+ )/s;
$scores{$job->{owner}}{$job->{problem}} = int ($factor * _calc_score ($value, $time, $tries{$job->{owner}}{$job->{problem}}++, $ct->{stop} - $ct->{start}));
}
my @st = sort { $b->{score} <=> $a->{score} or $a->{user} cmp $b->{user} } map { ## no critic (ProhibitReverseSortBlock)
my $user = $_;
+{
user => $user,
user_name => _object_name(users => $user),
score => sum (values %{$scores{$user}}),
scores => [map { $scores{$user}{$_->{id}} // '-'} @problems],
}
} keys %scores;
$st[0]->{rank} = 1 if @st;
$st[$_]->{rank} = $st[$_ - 1]->{rank} + ($st[$_]->{score} < $st[$_ - 1]->{score}) for 1 .. $#st;
\@st
}
sub update_status {
my $jobs = $db->select('jobs', 'id,owner,problem,result', {-not_bool => 'private'}, 'id');
my %hash;
while ($jobs->into(my ($id, $owner, $problem, $result))) {
$hash{$problem, $owner} = [$id, $result ? 0 : 1];
}
my @problem_statuses = map { [split ($;), @{$hash{$_}} ] } keys %hash;
my @contest_statuses = map {
my $ct = $_;
map { [$ct, $_->{user}, $_->{score}, $_->{rank}] } @{standings $ct}
} $db->select('contests', 'id')->flat;
$db->begin;
$db->delete('problem_status');
$db->query('INSERT INTO problem_status (problem,owner,job,solved) VALUES (??)', @$_) for @problem_statuses;
$db->delete('contest_status');
$db->query('INSERT INTO contest_status (contest,owner,score,rank) VALUES (??)', @$_) for @contest_statuses;
$db->commit
}
sub rerun_problem {
my ($problem) = @_;
_query rerun_problem_sth => $problem;
purge '/log/';
}
sub rerun_job {
my ($id) = @_;
_query rerun_job_sth => $id;
purge '/log/';
purge "/log/$id";
}
sub take_job {
my ($daemon) = @_;
my $id = _query(take_job_sth => $daemon)->list;
return unless $id;
purge '/log/';
purge "/log/$id";
db->select(jobs => '*', {id => $id})->hash
}
sub finish_job {
my ($job, $private, %args) = @_;
db->update(jobs => \%args, {id => $job->{id}});
purge '/log/';
purge '/log/' . $job->{id};
purge '/st/' . $job->{contest} if $job->{contest};
return if $private;
my $status = {
problem => $job->{problem},
owner => $job->{owner},
job => $job->{id},
solved => ($args{result} ? 0 : 1),
};
eval {
db->insert(problem_status => $status)
} or db->update(problem_status => $status, {owner => $job->{owner}, problem => $job->{problem}});
purge '/us/' . $job->{owner};
}
sub open_problem {
my ($contest, $problem, $owner, $time) = @_;
my $ct = contest_entry($contest);
return unless $ct->{id} && $time >= $ct->{start} && $time < $ct->{stop}; ## no critic (ProhibitNegativeExpressionsInUnlessAndUntilConditions)
eval { db->insert(opens => { ## no critic (RequireCheckingReturnValueOfEval)
contest => $contest,
problem => $problem,
owner => $owner,
time => $time}) };
}
my @PURGE_HOSTS = exists $ENV{PURGE_HOSTS} ? split ' ', $ENV{PURGE_HOSTS} : ();
my $ht = HTTP::Tiny->new;
sub purge {
$ht->request(PURGE => "http://$_$_[0]") for @PURGE_HOSTS;
}
1;
__END__
=encoding utf-8
=head1 NAME
Gruntmaster::Data - Gruntmaster 6000 Online Judge -- database interface and tools
=head1 SYNOPSIS
=head1 DESCRIPTION
Gruntmaster::Data is the interface to the Gruntmaster 6000 database.
All functions are exported by default.
=over
=item B<dbinit>(I<@args>)
This function connects to the database. I<@args> are the arguments
passed to the L<DBIx::Simple> constructor.
=item B<purge>(I<$url_path>)
Purges a relative URL from the Varnish Cache by sending PURGE
$url_path requests to all hosts in the PURGE_HOSTS environment
variable.
=item B<db>
Returns a L<DBIx::Simple> object for interacting with the database
directly. Use this when no other function in this module is suitable.
=item B<user_list>
Returns an arrayref of the top 200 users.
=item B<user_entry>(I<$id>)
Returns a hashref describing the user I<$id>.
=item B<problem_list>([I<%args>])
Returns an arrayref of problems.
Takes the following named arguments:
=over
=item owner
Only show problems owned by this user
=item contest
Only show problems in this contest
=item private
If true, include private problems. Always true if contest is present.
=item solution
If true, include problem solutions
=back
=item B<problem_entry>(i<$id>, [I<$contest>])
Returns a hashref describing the problem I<$id>. If $contest is
present, contest start and stop times are included, and the solution
is deleted.
=item B<contest_list>
Returns an arrayref of contests.
=item B<contest_entry>(I<$id>)
Returns a hashref describing the contest I<$id>.
=item B<contest_has_problem>(I<$contest>, I<$problem>)
Returns true if the contest I<$contest> includes the problem
I<$problem>, false otherwise.
=item B<job_list>([I<%args>])
In scalar context, returns an arrayref of jobs. In list context,
returns an arrayref of jobs and a hashref of information about pages.
Takes the following named arguments:
=over
=item page
Show this page of the job log. Defaults to 1.
=item owner
Only show jobs submitted by this user.
=item contest
Only show jobs submitted in this contest.
=item problem
Only show jobs submitted for this problem.
=item result
Only show jobs with this result (see the constants in
L<Gruntmaster::Daemon::Constants>).
=item private
If true, include private jobs. Defaults to false.
=back
=item B<job_entry>(I<$id>)
Returns a hashref describing the job I<$id>.
=item B<create_job>(I<%args>)
Insert a new job into the database. This function also updates the
lastjob field for the job's owner.
=item B<standings>(I<$ct>)
Returns an arrayref of the standings of contest I<$ct>.
=item B<update_status>
Rebuilds the problem_status and contest_status tables.
=item B<rerun_job>(I<$id>)
Marks the job $id as pending and clears its results, so that it will
be run again by the daemon.
=item B<take_job>(I<$daemon>)
Marks a random job as being run by I<$daemon>. Returns a hashref
describing the job, or undef if no job was available.
=item B<finish_job>(I<$job>, I<$private>, I<%results>)
Updates the job $job with the results in %results. If $private is
false, also updates the problem_status table.
=item B<open_problem>(I<$contest>, I<$problem>, I<$owner>, I<$time>)
Notes that I<$owner> has opened the problem I<$problem> of contest
I<$contest> at time I<$time>. If the C<opens> table already contains
this (I<$contest>, I<$problem>, I<$owner>) triplet, this function does
nothing.
=back
=head1 AUTHOR
Marius Gavrilescu E<lt>marius@ieval.roE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2014-2016 by Marius Gavrilescu
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.20.1 or,
at your option, any later version of Perl 5 you may have available.
=cut