[gruntmaster-data.git] / lib / Gruntmaster / Data.pm

use utf8;
package Gruntmaster::Data;

# Created by DBIx::Class::Schema::Loader
# DO NOT MODIFY THE FIRST PART OF THIS FILE

use strict;
use warnings;

use base 'DBIx::Class::Schema';

__PACKAGE__->load_namespaces;


# Created by DBIx::Class::Schema::Loader v0.07039 @ 2014-03-05 13:11:39
# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:dAEmtAexvUaNXLgYz2rNEg

use parent qw/Exporter/;
our $VERSION = '5999.000_012';
our @EXPORT = qw/purge/; ## no critic (ProhibitAutomaticExportation)

use Lingua::EN::Inflect qw/PL_N/;
use JSON::MaybeXS qw/decode_json/;
use HTTP::Tiny;
use PerlX::Maybe qw/maybe/;
use Sub::Name qw/subname/;

use constant PROBLEM_PUBLIC_COLUMNS => [qw/id author writer level name owner private statement timeout olimit value/];
use constant USER_PUBLIC_COLUMNS => [qw/id admin name town university level/];
use constant JOBS_PER_PAGE => 10;

sub dynsub{
	our ($name, $sub) = @_;
	no strict 'refs'; ## no critic (Strict)
	*$name = subname $name => $sub
}

BEGIN {
	for my $rs (qw/contest contest_problem job open problem user problem_status contest_status/) {
		my $rsname = ucfirst $rs;
		$rsname =~ s/_([a-z])/\u$1/gs;
		dynsub PL_N($rs) => sub { $_[0]->resultset($rsname)              };
		dynsub      $rs  => sub { $_[0]->resultset($rsname)->find($_[1]) };
	}
}

sub user_list {
	my ($self) = @_;
	my $rs = $self->users->search(undef, {columns => USER_PUBLIC_COLUMNS} );
	my (%solved, %attempted, %contests);

	for my $row ($self->problem_statuses->all) {
		$solved   {$row->rawowner}++ if     $row->solved;
		$attempted{$row->rawowner}++ unless $row->solved;
	}
	$contests{$_->rawowner}++ for $self->contest_statuses->all;

	[ sort { $b->{solved} <=> $a->{solved} or $b->{attempted} <=> $a->{attempted} } map { ## no critic (ProhibitReverseSort)
		my $id = $_->id;
		+{ $_->get_columns,
		   solved => ($solved{$id} // 0),
		   attempted => ($attempted{$id} // 0),
		   contests => ($contests{$id} // 0) }
	} $rs->all ]
}

sub user_entry {
	my ($self, $id) = @_;
	my $user = $self->users->find($id, {columns => USER_PUBLIC_COLUMNS, prefetch => [qw/problem_statuses contest_statuses/]});
	my @problems = map { {problem => $_->get_column('problem'), solved => $_->solved} } $user->problem_statuses->search(undef, {order_by => 'problem'});
	my @contests = map { {contest => $_->contest->id, contest_name => $_->contest->name, rank => $_->rank, score => $_->score} } $user->contest_statuses->search(undef, {prefetch => 'contest', order_by => 'contest.start DESC'});
	+{ $user->get_columns, problems => \@problems, contests => \@contests }
}

sub problem_list {
	my ($self, %args) = @_;
	my $rs = $self->problems->search(undef, {order_by => 'me.name', columns => PROBLEM_PUBLIC_COLUMNS, prefetch => 'owner'});
	$rs = $rs->search({-or => ['contest_problems.contest' => undef, 'contest.stop' => {'<=', time}], 'me.private' => 0}, {join => {'contest_problems' => 'contest'}, distinct => 1}) unless $args{contest};
	$rs = $rs->search({'contest_problems.contest' => $args{contest}}, {join => 'contest_problems'}) if $args{contest};
	$rs = $rs->search({'me.owner' => $args{owner}}) if $args{owner};
	my %params;
	$params{contest} = $args{contest} if $args{contest};
	for ($rs->all) {
		$params{$_->level} //= [];
		push @{$params{$_->level}}, {$_->get_columns, owner_name => $_->owner->name} ;
	}
	\%params
}

sub problem_entry {
	my ($self, $id, $contest, $user) = @_;
	my $running = $contest && $self->contest($contest)->is_running;
	my $columns = PROBLEM_PUBLIC_COLUMNS;
	push @$columns, 'solution' unless $running;
	my $pb = $self->problems->find($id, {columns => $columns, prefetch => 'owner'});
	eval { ## no critic (RequireCheckingReturnValueOfEval)
		$self->opens->create({
			contest => $contest,
			problem => $id,
			owner => $user,
			time => time,
		})
	} if $running;
	$contest &&= $self->contest($contest);
	+{ $pb->get_columns, owner_name => $pb->owner->name, cansubmit => $contest ? $running : 1, $running ? (contest_start => $contest->start, contest_stop => $contest->stop) : () }
}

sub contest_list {
	my ($self, %args) = @_;
	my $rs = $self->contests->search(undef, {order_by => {-desc => 'start'}, prefetch => 'owner'});
	$rs = $rs->search({owner => $args{owner}}) if $args{owner};
	my %params;
	for ($rs->all) {
		my $state = $_->is_pending ? 'pending' : $_->is_running ? 'running' : 'finished';
		$params{$state} //= [];
		push @{$params{$state}}, { $_->get_columns, started => !$_->is_pending, owner_name => $_->owner->name };
	}
	\%params
}

sub contest_entry {
	my ($self, $id) = @_;
	my $ct = $self->contest($id);
	+{ $ct->get_columns, started => !$ct->is_pending, owner_name => $ct->owner->name }
}

sub job_list {
	my ($self, %args) = @_;
	$args{page} //= 1;
	my $rs = $self->jobs->search({'me.private' => 0}, {order_by => {-desc => 'me.id'}, prefetch => ['problem', 'owner'], rows => JOBS_PER_PAGE, page => $args{page}});
	$rs = $rs->search({'me.owner' => $args{owner}})   if $args{owner};
	$rs = $rs->search({contest    => $args{contest}}) if $args{contest};
	$rs = $rs->search({problem    => $args{problem}}) if $args{problem};
	return {
		log => [map {
			my %params = $_->get_columns;
			$params{owner_name}   = $_->owner->name;
			$params{problem_name} = $_->problem->name;
			$params{results} &&= decode_json $params{results};
			$params{size}      = length $params{source};
			delete $params{source};
			\%params
		} $rs->all],
		current_page => $rs->pager->current_page,
		maybe previous_page => $rs->pager->previous_page,
		maybe next_page => $rs->pager->next_page,
		maybe last_page => $rs->pager->last_page,
	}
}

sub job_entry {
	my ($self, $id) = @_;
	my $job = $self->jobs->find($id, {prefetch => ['problem', 'owner']});
	my %params = $job->get_columns;
	$params{owner_name}   = $job->owner->name;
	$params{problem_name} = $job->problem->name;
	$params{results} &&= decode_json $params{results};
	$params{size}      = length $params{source};
	delete $params{source};
	\%params
}

sub update_status {
	my ($self) = @_;
	my @jobs = $self->jobs->search(undef, {cache => 1})->all;

	my %hash;
	$hash{$_->get_column('problem'), $_->get_column('owner')} = [$_->id, $_->result ? 0 : 1] for @jobs;
	my @problem_statuses = map { [split ($;), @{$hash{$_}} ] } keys %hash;

	my @contest_statuses = map {
		my $contest = $_->id;
		map { [$contest, $_->{user}, $_->{score}, $_->{rank}] } $_->standings
	} $self->contests->all;

	my $txn = sub {
		$self->problem_statuses->delete;
		$self->problem_statuses->populate([[qw/problem owner job solved/], @problem_statuses]);
		$self->contest_statuses->delete;
		$self->contest_statuses->populate([[qw/contest owner score rank/], @contest_statuses]);
	};

	$self->txn_do($txn);
}

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

  my $db = Gruntmaster::Data->connect('dbi:Pg:');

  my $problem = $db->problem('my_problem');
  $problem->update({timeout => 2.5}); # Set time limit to 2.5 seconds
  $problem->rerun; # And rerun all jobs for this problem

  # ...

  my $contest = $db->contests->create({ # Create a new contest
    id => 'my_contest',
    name => 'My Awesome Contest',
    start => time + 100,
    end => time + 1900,
  });
  $db->contest_problems->create({ # Add a problem to the contest
    contest => 'my_contest',
    problem => 'my_problem',
  });

  say 'The contest has not started yet' if $contest->is_pending;

  # ...

  my @jobs = $db->jobs->search({contest => 'my_contest', owner => 'MGV'})->all;
  $_->rerun for @jobs; # Rerun all jobs sent by MGV in my_contest

=head1 DESCRIPTION

Gruntmaster::Data is the interface to the Gruntmaster 6000 database. Read the L<DBIx::Class> documentation for usage information.

In addition to the typical DBIx::Class::Schema methods, this module contains several convenience methods:

=over

=item contests

Equivalent to C<< $schema->resultset('Contest') >>

=item contest_problems

Equivalent to C<< $schema->resultset('ContestProblem') >>

=item jobs

Equivalent to C<< $schema->resultset('Job') >>

=item problems

Equivalent to C<< $schema->resultset('Problem') >>

=item users

Equivalent to C<< $schema->resultset('User') >>

=item contest($id)

Equivalent to C<< $schema->resultset('Contest')->find($id) >>

=item job($id)

Equivalent to C<< $schema->resultset('Job')->find($id) >>

=item problem($id)

Equivalent to C<< $schema->resultset('Problem')->find($id) >>

=item user($id)

Equivalent to C<< $schema->resultset('User')->find($id) >>

=item user_list

Returns a list of users as an arrayref containing hashrefs.

=item user_entry($id)

Returns a hashref with information about the user $id.

=item problem_list([%args])

Returns a list of problems grouped by level. A hashref with levels as keys.

Takes the following arguments:

=over

=item owner

Only show problems owned by this user

=item contest

Only show problems in this contest

=back

=item problem_entry($id, [$contest, $user])

Returns a hashref with information about the problem $id. If $contest and $user are present, problem open data is updated.

=item contest_list([%args])

Returns a list of contests grouped by state. A hashref with the following keys:

=over

=item pending

An arrayref of hashrefs representing pending contests

=item running

An arrayref of hashrefs representing running contests

=item finished

An arrayref of hashrefs representing finished contests

=back

Takes the following arguments:

=over

=item owner

Only show contests owned by this user.

=back

=item contest_entry($id)

Returns a hashref with information about the contest $id.

=item job_list([%args])

Returns a list of jobs as an arrayref containing hashrefs. Takes the following arguments:

=over

=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 page

Show this page of results. Defaults to 1. Pages have 10 entries, and the first page has the most recent jobs.

=back

=item job_entry($id)

Returns a hashref with information about the job $id.

=back

=head1 AUTHOR

Marius Gavrilescu E<lt>marius@ieval.roE<gt>

=head1 COPYRIGHT AND LICENSE

Copyright (C) 2014 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 5.18.1 or,
at your option, any later version of Perl 5 you may have available.


=cut
Commit	Line	Data
4ed3f8e7	1	use utf8;
bbf8209c	2	package Gruntmaster::Data;
4ed3f8e7 MG	3
	4	# Created by DBIx::Class::Schema::Loader
	5	# DO NOT MODIFY THE FIRST PART OF THIS FILE
	6
	7	use strict;
bbf8209c	8	use warnings;
014ee8a6	9
4ed3f8e7 MG	10	use base 'DBIx::Class::Schema';
	11
	12	__PACKAGE__->load_namespaces;
014ee8a6	13
f7386aab	14
4ed3f8e7 MG	15	# Created by DBIx::Class::Schema::Loader v0.07039 @ 2014-03-05 13:11:39
	16	# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:dAEmtAexvUaNXLgYz2rNEg
	17
edfc5928	18	use parent qw/Exporter/;
625a7bd0	19	our $VERSION = '5999.000_012';
de7226ca	20	our @EXPORT = qw/purge/; ## no critic (ProhibitAutomaticExportation)
4ed3f8e7 MG	21
4ed3f8e7 MG	22	use Lingua::EN::Inflect qw/PL_N/;
91203bd5	23	use JSON::MaybeXS qw/decode_json/;
edfc5928	24	use HTTP::Tiny;
3473324b	25	use PerlX::Maybe qw/maybe/;
4ed3f8e7	26	use Sub::Name qw/subname/;
014ee8a6	27
de625c9b MG	28	use constant PROBLEM_PUBLIC_COLUMNS => [qw/id author writer level name owner private statement timeout olimit value/];
	29	use constant USER_PUBLIC_COLUMNS => [qw/id admin name town university level/];
	30	use constant JOBS_PER_PAGE => 10;
	31
014ee8a6	32	sub dynsub{
fb6a4e3d	33	our ($name, $sub) = @_;
dcd72991	34	no strict 'refs'; ## no critic (Strict)
fb6a4e3d	35	*$name = subname $name => $sub
014ee8a6 MG	36	}
	37
	38	BEGIN {
adb42d4d	39	for my $rs (qw/contest contest_problem job open problem user problem_status contest_status/) {
4ed3f8e7	40	my $rsname = ucfirst $rs;
dcd72991	41	$rsname =~ s/_([a-z])/\u$1/gs;
4ed3f8e7 MG	42	dynsub PL_N($rs) => sub { $_[0]->resultset($rsname) };
4ed3f8e7 MG	43	dynsub $rs => sub { $_[0]->resultset($rsname)->find($_[1]) };
014ee8a6 MG	44	}
	45	}
	46
de625c9b	47	sub user_list {
c9311d50 MG	48	my ($self) = @_;
	49	my $rs = $self->users->search(undef, {columns => USER_PUBLIC_COLUMNS} );
	50	my (%solved, %attempted, %contests);
	51
	52	for my $row ($self->problem_statuses->all) {
	53	$solved {$row->rawowner}++ if $row->solved;
	54	$attempted{$row->rawowner}++ unless $row->solved;
	55	}
	56	$contests{$_->rawowner}++ for $self->contest_statuses->all;
	57
1db27a21	58	[ sort { $b->{solved} <=> $a->{solved} or $b->{attempted} <=> $a->{attempted} } map { ## no critic (ProhibitReverseSort)
c9311d50 MG	59	my $id = $_->id;
	60	+{ $_->get_columns,
	61	solved => ($solved{$id} // 0),
	62	attempted => ($attempted{$id} // 0),
	63	contests => ($contests{$id} // 0) }
281c3952	64	} $rs->all ]
de625c9b MG	65	}
	66
	67	sub user_entry {
	68	my ($self, $id) = @_;
adb42d4d	69	my $user = $self->users->find($id, {columns => USER_PUBLIC_COLUMNS, prefetch => [qw/problem_statuses contest_statuses/]});
197d1959 MG	70	my @problems = map { {problem => $_->get_column('problem'), solved => $_->solved} } $user->problem_statuses->search(undef, {order_by => 'problem'});
197d1959 MG	71	my @contests = map { {contest => $_->contest->id, contest_name => $_->contest->name, rank => $_->rank, score => $_->score} } $user->contest_statuses->search(undef, {prefetch => 'contest', order_by => 'contest.start DESC'});
adb42d4d	72	+{ $user->get_columns, problems => \@problems, contests => \@contests }
de625c9b MG	73	}
	74
	75	sub problem_list {
	76	my ($self, %args) = @_;
	77	my $rs = $self->problems->search(undef, {order_by => 'me.name', columns => PROBLEM_PUBLIC_COLUMNS, prefetch => 'owner'});
	78	$rs = $rs->search({-or => ['contest_problems.contest' => undef, 'contest.stop' => {'<=', time}], 'me.private' => 0}, {join => {'contest_problems' => 'contest'}, distinct => 1}) unless $args{contest};
	79	$rs = $rs->search({'contest_problems.contest' => $args{contest}}, {join => 'contest_problems'}) if $args{contest};
	80	$rs = $rs->search({'me.owner' => $args{owner}}) if $args{owner};
	81	my %params;
	82	$params{contest} = $args{contest} if $args{contest};
	83	for ($rs->all) {
	84	$params{$_->level} //= [];
35596ea8	85	push @{$params{$_->level}}, {$_->get_columns, owner_name => $_->owner->name} ;
de625c9b MG	86	}
	87	\%params
	88	}
	89
	90	sub problem_entry {
	91	my ($self, $id, $contest, $user) = @_;
de625c9b	92	my $running = $contest && $self->contest($contest)->is_running;
8bd66733 MG	93	my $columns = PROBLEM_PUBLIC_COLUMNS;
	94	push @$columns, 'solution' unless $running;
	95	my $pb = $self->problems->find($id, {columns => $columns, prefetch => 'owner'});
dcd72991	96	eval { ## no critic (RequireCheckingReturnValueOfEval)
de625c9b MG	97	$self->opens->create({
	98	contest => $contest,
	99	problem => $id,
	100	owner => $user,
	101	time => time,
	102	})
	103	} if $running;
2431260b MG	104	$contest &&= $self->contest($contest);
2431260b MG	105	+{ $pb->get_columns, owner_name => $pb->owner->name, cansubmit => $contest ? $running : 1, $running ? (contest_start => $contest->start, contest_stop => $contest->stop) : () }
de625c9b MG	106	}
	107
	108	sub contest_list {
	109	my ($self, %args) = @_;
	110	my $rs = $self->contests->search(undef, {order_by => {-desc => 'start'}, prefetch => 'owner'});
	111	$rs = $rs->search({owner => $args{owner}}) if $args{owner};
	112	my %params;
	113	for ($rs->all) {
	114	my $state = $_->is_pending ? 'pending' : $_->is_running ? 'running' : 'finished';
	115	$params{$state} //= [];
35596ea8	116	push @{$params{$state}}, { $_->get_columns, started => !$_->is_pending, owner_name => $_->owner->name };
de625c9b MG	117	}
	118	\%params
	119	}
	120
	121	sub contest_entry {
	122	my ($self, $id) = @_;
	123	my $ct = $self->contest($id);
	124	+{ $ct->get_columns, started => !$ct->is_pending, owner_name => $ct->owner->name }
	125	}
	126
	127	sub job_list {
	128	my ($self, %args) = @_;
	129	$args{page} //= 1;
d878fba3	130	my $rs = $self->jobs->search({'me.private' => 0}, {order_by => {-desc => 'me.id'}, prefetch => ['problem', 'owner'], rows => JOBS_PER_PAGE, page => $args{page}});
526b9e80 MG	131	$rs = $rs->search({'me.owner' => $args{owner}}) if $args{owner};
	132	$rs = $rs->search({contest => $args{contest}}) if $args{contest};
	133	$rs = $rs->search({problem => $args{problem}}) if $args{problem};
3473324b MG	134	return {
	135	log => [map {
	136	my %params = $_->get_columns;
	137	$params{owner_name} = $_->owner->name;
	138	$params{problem_name} = $_->problem->name;
	139	$params{results} &&= decode_json $params{results};
	140	$params{size} = length $params{source};
	141	delete $params{source};
	142	\%params
	143	} $rs->all],
	144	current_page => $rs->pager->current_page,
	145	maybe previous_page => $rs->pager->previous_page,
	146	maybe next_page => $rs->pager->next_page,
	147	maybe last_page => $rs->pager->last_page,
	148	}
de625c9b MG	149	}
	150
	151	sub job_entry {
	152	my ($self, $id) = @_;
	153	my $job = $self->jobs->find($id, {prefetch => ['problem', 'owner']});
	154	my %params = $job->get_columns;
	155	$params{owner_name} = $job->owner->name;
	156	$params{problem_name} = $job->problem->name;
	157	$params{results} &&= decode_json $params{results};
	158	$params{size} = length $params{source};
	159	delete $params{source};
	160	\%params
	161	}
	162
adb42d4d MG	163	sub update_status {
	164	my ($self) = @_;
	165	my @jobs = $self->jobs->search(undef, {cache => 1})->all;
a2aa46e6	166
adb42d4d	167	my %hash;
9bfb38e0	168	$hash{$_->get_column('problem'), $_->get_column('owner')} = [$_->id, $_->result ? 0 : 1] for @jobs;
adb42d4d MG	169	my @problem_statuses = map { [split ($;), @{$hash{$_}} ] } keys %hash;
	170
	171	my @contest_statuses = map {
	172	my $contest = $_->id;
751c70b5	173	map { [$contest, $_->{user}, $_->{score}, $_->{rank}] } $_->standings
adb42d4d MG	174	} $self->contests->all;
	175
	176	my $txn = sub {
	177	$self->problem_statuses->delete;
	178	$self->problem_statuses->populate([[qw/problem owner job solved/], @problem_statuses]);
	179	$self->contest_statuses->delete;
	180	$self->contest_statuses->populate([[qw/contest owner score rank/], @contest_statuses]);
	181	};
	182
	183	$self->txn_do($txn);
	184	}
	185
edfc5928 MG	186	my @PURGE_HOSTS = exists $ENV{PURGE_HOSTS} ? split ' ', $ENV{PURGE_HOSTS} : ();
	187	my $ht = HTTP::Tiny->new;
	188
de7226ca MG	189	sub purge {
	190	$ht->request(PURGE => "http://$_$_[0]") for @PURGE_HOSTS;
	191	}
edfc5928	192
f7386aab	193	1;
4a8747ef MG	194
	195	__END__
	196
	197	=encoding utf-8
	198
	199	=head1 NAME
	200
	201	Gruntmaster::Data - Gruntmaster 6000 Online Judge -- database interface and tools
	202
	203	=head1 SYNOPSIS
	204
	205	my $db = Gruntmaster::Data->connect('dbi:Pg:');
cbb36c78 MG	206
	207	my $problem = $db->problem('my_problem');
	208	$problem->update({timeout => 2.5}); # Set time limit to 2.5 seconds
	209	$problem->rerun; # And rerun all jobs for this problem
	210
	211	# ...
	212
	213	my $contest = $db->contests->create({ # Create a new contest
	214	id => 'my_contest',
	215	name => 'My Awesome Contest',
	216	start => time + 100,
	217	end => time + 1900,
	218	});
	219	$db->contest_problems->create({ # Add a problem to the contest
	220	contest => 'my_contest',
	221	problem => 'my_problem',
	222	});
	223
	224	say 'The contest has not started yet' if $contest->is_pending;
	225
	226	# ...
	227
	228	my @jobs = $db->jobs->search({contest => 'my_contest', owner => 'MGV'})->all;
	229	$_->rerun for @jobs; # Rerun all jobs sent by MGV in my_contest
4a8747ef MG	230
	231	=head1 DESCRIPTION
	232
cbb36c78 MG	233	Gruntmaster::Data is the interface to the Gruntmaster 6000 database. Read the L<DBIx::Class> documentation for usage information.
	234
	235	In addition to the typical DBIx::Class::Schema methods, this module contains several convenience methods:
	236
	237	=over
	238
	239	=item contests
	240
	241	Equivalent to C<< $schema->resultset('Contest') >>
	242
	243	=item contest_problems
	244
	245	Equivalent to C<< $schema->resultset('ContestProblem') >>
	246
	247	=item jobs
	248
	249	Equivalent to C<< $schema->resultset('Job') >>
	250
	251	=item problems
	252
	253	Equivalent to C<< $schema->resultset('Problem') >>
	254
	255	=item users
	256
	257	Equivalent to C<< $schema->resultset('User') >>
	258
	259	=item contest($id)
	260
	261	Equivalent to C<< $schema->resultset('Contest')->find($id) >>
	262
	263	=item job($id)
	264
	265	Equivalent to C<< $schema->resultset('Job')->find($id) >>
	266
	267	=item problem($id)
	268
	269	Equivalent to C<< $schema->resultset('Problem')->find($id) >>
	270
	271	=item user($id)
	272
	273	Equivalent to C<< $schema->resultset('User')->find($id) >>
	274
de625c9b MG	275	=item user_list
	276
	277	Returns a list of users as an arrayref containing hashrefs.
	278
	279	=item user_entry($id)
	280
	281	Returns a hashref with information about the user $id.
	282
	283	=item problem_list([%args])
	284
	285	Returns a list of problems grouped by level. A hashref with levels as keys.
	286
	287	Takes the following arguments:
	288
	289	=over
	290
	291	=item owner
	292
	293	Only show problems owned by this user
	294
	295	=item contest
	296
	297	Only show problems in this contest
	298
	299	=back
	300
	301	=item problem_entry($id, [$contest, $user])
	302
	303	Returns a hashref with information about the problem $id. If $contest and $user are present, problem open data is updated.
	304
	305	=item contest_list([%args])
	306
	307	Returns a list of contests grouped by state. A hashref with the following keys:
	308
	309	=over
	310
	311	=item pending
	312
	313	An arrayref of hashrefs representing pending contests
	314
	315	=item running
	316
	317	An arrayref of hashrefs representing running contests
	318
	319	=item finished
	320
	321	An arrayref of hashrefs representing finished contests
	322
	323	=back
	324
	325	Takes the following arguments:
	326
	327	=over
	328
	329	=item owner
	330
	331	Only show contests owned by this user.
	332
	333	=back
	334
	335	=item contest_entry($id)
	336
	337	Returns a hashref with information about the contest $id.
	338
339	=item job_list([%args])
340
341	Returns a list of jobs as an arrayref containing hashrefs. Takes the following arguments:
342
343	=over
344
345	=item owner
346
347	Only show jobs submitted by this user.
348
349	=item contest
350
351	Only show jobs submitted in this contest.
352
353	=item problem
354
355	Only show jobs submitted for this problem.
356
357	=item page
358
359	Show this page of results. Defaults to 1. Pages have 10 entries, and the first page has the most recent jobs.
360
361	=back
362
363	=item job_entry($id)
364
365	Returns a hashref with information about the job $id.
366
cbb36c78	367	=back
4a8747ef MG	368
	369	=head1 AUTHOR
	370
	371	Marius Gavrilescu E<lt>marius@ieval.roE<gt>
	372
	373	=head1 COPYRIGHT AND LICENSE
	374
	375	Copyright (C) 2014 by Marius Gavrilescu
	376
9d2e740e MG	377	This library is free software; you can redistribute it and/or modify
	378	it under the same terms as Perl itself, either Perl version 5.18.1 or,
	379	at your option, any later version of Perl 5 you may have available.
4a8747ef MG	380
	381
	382	=cut