lib/Gruntmaster/Data.pm

   1 package Gruntmaster::Data;
   2 use 5.014;
   3 use warnings;
   4
   5 use parent qw/Exporter/;
   6 our $VERSION = '5999.000_014';
   7 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 take_job finish_job open_problem/;
   8 our @EXPORT_OK = @EXPORT;
   9
  10 use JSON::MaybeXS qw/decode_json/;
  11 use HTTP::Tiny;
  12 use PerlX::Maybe qw/maybe/;
  13
  14 use DBI;
  15 use DBIx::Simple;
  16 use List::Util qw/sum/;
  17 use SQL::Abstract;
  18
  19 use constant PROBLEM_PUBLIC_COLUMNS => [qw/id author writer level name owner private timeout olimit value/];
  20 use constant JOBS_PER_PAGE => 50;
  21
  22 my %statements = (
  23         user_list_sth => 'SELECT * FROM user_list LIMIT 200',
  24         user_entry_sth => 'SELECT * FROM user_data WHERE id = ?',
  25
  26         problem_status_sth => 'SELECT problem,solved FROM problem_status WHERE owner = ?',
  27         contest_status_sth => 'SELECT contest,score,rank FROM contest_status WHERE owner = ?',
  28
  29         contest_list_sth => 'SELECT * FROM contest_entry',
  30         contest_entry_sth => 'SELECT * FROM contest_entry WHERE id = ?',
  31         contest_has_problem_sth => 'SELECT EXISTS(SELECT 1 FROM contest_problems WHERE contest = ? AND problem = ?)',
  32         opens_sth => 'SELECT problem,owner,time FROM opens WHERE contest = ?',
  33
  34         problem_entry_sth => 'SELECT ' . (join ',', @{PROBLEM_PUBLIC_COLUMNS()}, 'statement', 'solution') . ' FROM problems WHERE id = ?',
  35         limits_sth => 'SELECT format,timeout FROM limits WHERE problem = ?',
  36
  37         job_entry_sth => 'SELECT * FROM job_entry WHERE id = ?',
  38
  39         rerun_job_sth => 'UPDATE jobs SET daemon=NULL,result=-2,result_text=NULL,results=NULL,errors=NULL WHERE id = ?',
  40         take_job_sth => 'UPDATE jobs SET daemon=? WHERE id = (SELECT id FROM jobs WHERE daemon IS NULL LIMIT 1 FOR UPDATE) RETURNING id',
  41 );
  42
  43 our $db;
  44 sub db () { $db }
  45
  46 sub dbinit {
  47         $db = DBIx::Simple->new(@_);
  48         $db->keep_statements = 100;
  49 };
  50
  51 sub purge;
  52
  53 sub _query {
  54         my ($stat, @extra) = @_;
  55         $db->query($statements{$stat}, @extra)
  56 }
  57
  58 my (%name_cache, %name_cache_time);
  59 use constant NAME_CACHE_MAX_AGE => 5;
  60
  61 sub _object_name {
  62         my ($table, $id) = @_;
  63         $name_cache_time{$table} //= 0;
  64         if (time - $name_cache_time{$table} > NAME_CACHE_MAX_AGE) {
  65                 $name_cache_time{$table} = time;
  66                 $name_cache{$table} = {};
  67                 $name_cache{$table} = $db->select($table, 'id,name')->map;
  68         }
  69
  70         $name_cache{$table}{$id}
  71 }
  72
  73
  74 sub _add_names ($) { ## no critic (ProhibitSubroutinePrototypes)
  75         my ($el) = @_;
  76         return unless defined $el;
  77         if (ref $el eq 'ARRAY') {
  78                 &_add_names ($_) for @$el ## no critic (ProhibitAmpersandSigils)
  79         } else {
  80                 for my $object (qw/contest owner problem/) {
  81                         my $table = $object eq 'owner' ? 'users' : "${object}s";
  82                         $el->{"${object}_name"} = _object_name $table, $el->{$object} if defined $el->{$object}
  83                 }
  84         }
  85
  86         $el
  87 }
  88
  89 sub user_list { scalar _query('user_list_sth')->hashes }
  90
  91 sub user_entry {
  92         my ($id) = @_;
  93         my $ret = _query('user_entry_sth', $id)->hash;
  94         $ret->{problems} = _add_names _query('problem_status_sth', $id)->hashes;
  95         $ret->{contests} = _add_names _query('contest_status_sth', $id)->hashes;
  96
  97         $ret;
  98 }
  99
 100 sub problem_list {
 101         my (%args) = @_;
 102         my @columns = @{PROBLEM_PUBLIC_COLUMNS()};
 103         push @columns, 'solution' if $args{solution};
 104         my %where;
 105         $where{private} = 0 unless $args{contest} || $args{private};
 106         $where{'cp.contest'} = $args{contest} if $args{contest};
 107         $where{owner} = $args{owner} if $args{owner};
 108
 109         my $table = $args{contest} ? 'problems JOIN contest_problems cp ON cp.problem = id' : 'problems';
 110         _add_names $db->select(\$table, \@columns, \%where, 'name')->hashes
 111 }
 112
 113 sub problem_entry {
 114         my ($id, $contest) = @_;
 115         $contest = contest_entry ($contest) if $contest;
 116         my $ret = _add_names _query(problem_entry_sth => $id)->hash;
 117         my $limits = _query(limits_sth => $id)->hashes;
 118         $ret->{limits} = $limits if @$limits;
 119
 120         if ($contest) {
 121                 $ret->{contest_start} = $contest->{start};
 122                 $ret->{contest_stop}  = $contest->{stop};
 123                 delete $ret->{solution}
 124         }
 125
 126         $ret
 127 }
 128
 129 sub contest_list { _add_names _query('contest_list_sth')->hashes }
 130
 131 sub contest_entry { _add_names _query(contest_entry_sth => $_[0])->hash }
 132
 133 sub contest_has_problem { _query('contest_has_problem_sth', @_[0, 1])->flat }
 134
 135 sub job_list {
 136         my (%args) = @_;
 137         $args{page} = int ($args{page} // 1);
 138         my %where = (
 139                 maybe contest => $args{contest},
 140                 maybe owner => $args{owner},
 141                 maybe problem => $args{problem},
 142                 maybe result => $args{result},
 143         );
 144         $where{private} = 0 unless $args{private};
 145
 146         my $rows = $db->select('job_entry', 'COUNT(*)', \%where)->list;
 147         my $pages = int (($rows + JOBS_PER_PAGE - 1) / JOBS_PER_PAGE);
 148         my ($stmt, @bind) = $db->abstract->select('job_entry', '*', \%where, {-desc => 'id'});
 149         my $jobs = _add_names $db->query("$stmt LIMIT " . JOBS_PER_PAGE . ' OFFSET ' . ($args{page} - 1) * JOBS_PER_PAGE, @bind)->hashes;
 150         my $pageinfo = {
 151                 current_page => $args{page},
 152                 last_page    => $pages,
 153                 ($args{page} - 1) ? (previous_page => $args{page} - 1) : (),
 154                 ($args{page} < $pages) ? (next_page => $args{page} + 1) : (),
 155         };
 156         wantarray ? ($jobs, $pageinfo) : $jobs;
 157 }
 158
 159 sub job_entry {
 160         my $ret = _add_names _query(job_entry_sth => $_[0])->hash;
 161         $ret->{results} = decode_json $ret->{results} if $ret->{results};
 162         $ret
 163 }
 164
 165 sub create_job {
 166         my (%args) = @_;
 167         $db->update('users', {lastjob => time}, {id => $args{owner}});
 168         purge '/log/';
 169         scalar $db->insert('jobs', \%args, {returning => 'id'})->list
 170 }
 171
 172 sub _calc_score {
 173         my ($mxscore, $time, $tries, $totaltime) = @_;
 174         my $score = $mxscore;
 175         $time = 300 if $time > $totaltime; # uncoverable branch true does not happen anymore (only possible if opens are broken)
 176         $score = ($totaltime - $time) / $totaltime * $score;
 177         $score -= $tries / 10 * $mxscore;
 178         $score = $mxscore * 3 / 10 if $score < $mxscore * 3 / 10;
 179         int $score + 0.5
 180 }
 181
 182 sub standings {
 183         my ($ct) = @_;
 184         my @problems = sort { $a->{value} <=> $b->{value} } @{problem_list contest => $ct};
 185         my %values = map { $_->{id} => $_->{value} } @problems;
 186         $ct = contest_entry $ct;
 187
 188         my (%scores, %tries, %opens);
 189         my $opens = _query(opens_sth => $ct->{id});
 190         while ($opens->into(my ($problem, $owner, $time))) {
 191                 $opens{$problem, $owner} = $time;
 192         }
 193
 194         my $jobs = $db->select('job_entry', '*', {contest => $ct->{id}}, 'id');
 195
 196         while (my $job = $jobs->hash) {
 197                 my $open = $opens{$job->{problem}, $job->{owner}} // $ct->{start};
 198                 my $time = $job->{date} - $open;
 199                 next if $time < 0; # uncoverable branch true job sent before contest is deprecated
 200                 my $value = $values{$job->{problem}};
 201                 my $factor = $job->{result} ? 0 : 1;
 202                 $factor = $1 / 100 if $job->{result_text} =~ /^(\d+ )/s;
 203                 $scores{$job->{owner}}{$job->{problem}} = int ($factor * _calc_score ($value, $time, $tries{$job->{owner}}{$job->{problem}}++, $ct->{stop} - $ct->{start}));
 204         }
 205
 206         my @st = sort { $b->{score} <=> $a->{score} or $a->{user} cmp $b->{user} } map { ## no critic (ProhibitReverseSortBlock)
 207                 my $user = $_;
 208                 +{
 209                         user => $user,
 210                         user_name => _object_name(users => $user),
 211                         score => sum (values %{$scores{$user}}),
 212                         scores => [map { $scores{$user}{$_->{id}} // '-'} @problems],
 213                 }
 214         } keys %scores;
 215
 216         $st[0]->{rank} = 1 if @st;
 217         $st[$_]->{rank} = $st[$_ - 1]->{rank} + ($st[$_]->{score} < $st[$_ - 1]->{score}) for 1 .. $#st;
 218
 219         \@st
 220 }
 221
 222 sub update_status {
 223         my $jobs = $db->select('jobs', 'id,owner,problem,result', {-not_bool => 'private'}, 'id');
 224
 225         my %hash;
 226         while ($jobs->into(my ($id, $owner, $problem, $result))) {
 227                 $hash{$problem, $owner} = [$id, $result ? 0 : 1];
 228         }
 229
 230         my @problem_statuses = map { [split ($;), @{$hash{$_}} ] } keys %hash;
 231
 232         my @contest_statuses = map {
 233                 my $ct = $_;
 234                 map { [$ct, $_->{user}, $_->{score}, $_->{rank}] } @{standings $ct}
 235         } $db->select('contests', 'id')->flat;
 236
 237         $db->begin;
 238         $db->delete('problem_status');
 239         $db->query('INSERT INTO problem_status (problem,owner,job,solved) VALUES (??)', @$_) for @problem_statuses;
 240         $db->delete('contest_status');
 241         $db->query('INSERT INTO contest_status (contest,owner,score,rank) VALUES (??)', @$_) for @contest_statuses;
 242         $db->commit
 243 }
 244
 245 sub rerun_job {
 246         my ($id) = @_;
 247         _query rerun_job_sth => $id;
 248         purge '/log/';
 249         purge "/log/$id";
 250 }
 251
 252 sub take_job {
 253         my ($daemon) = @_;
 254         my $id = _query(take_job_sth => $daemon)->list;
 255         return unless $id;
 256         purge '/log/';
 257         purge "/log/$id";
 258         db->select(jobs => '*', {id => $id})->hash
 259 }
 260
 261 sub finish_job {
 262         my ($job, $private, %args) = @_;
 263         db->update(jobs => \%args, {id => $job->{id}});
 264         purge '/log/';
 265         purge '/log/' . $job->{id};
 266         return if $private;
 267         my $status = {
 268                 problem => $job->{problem},
 269                 owner   => $job->{owner},
 270                 job     => $job->{id},
 271                 solved  => ($args{result} ? 0 : 1),
 272         };
 273         eval {
 274                 db->insert(problem_status => $status)
 275         } or db->update(problem_status => $status, {owner => $job->{owner}, problem => $job->{problem}});
 276         purge '/us/' . $job->{owner};
 277 }
 278
 279 sub open_problem {
 280         my ($contest, $problem, $owner, $time) = @_;
 281         my $ct = contest_entry($contest);
 282         return unless $ct->{id} && $time >= $ct->{start} && $time < $ct->{stop}; ## no critic (ProhibitNegativeExpressionsInUnlessAndUntilConditions)
 283         eval { db->insert(opens => { ## no critic (RequireCheckingReturnValueOfEval)
 284                 contest => $contest,
 285                 problem => $problem,
 286                 owner => $owner,
 287                 time => $time}) };
 288 }
 289
 290 my @PURGE_HOSTS = exists $ENV{PURGE_HOSTS} ? split ' ', $ENV{PURGE_HOSTS} : ();
 291 my $ht = HTTP::Tiny->new;
 292
 293 sub purge {
 294         $ht->request(PURGE => "http://$_$_[0]") for @PURGE_HOSTS;
 295 }
 296
 297 1;
 298
 299 __END__
 300
 301 =encoding utf-8
 302
 303 =head1 NAME
 304
 305 Gruntmaster::Data - Gruntmaster 6000 Online Judge -- database interface and tools
 306
 307 =head1 SYNOPSIS
 308
 309
 310 =head1 DESCRIPTION
 311
 312 Gruntmaster::Data is the interface to the Gruntmaster 6000 database.
 313
 314 All functions are exported by default.
 315
 316 =over
 317
 318 =item B<dbinit>(I<@args>)
 319
 320 This function connects to the database. I<@args> are the arguments
 321 passed to the L<DBIx::Simple> constructor.
 322
 323 =item B<purge>(I<$url_path>)
 324
 325 Purges a relative URL from the Varnish Cache by sending PURGE
 326 $url_path requests to all hosts in the PURGE_HOSTS environment
 327 variable.
 328
 329 =item B<db>
 330
 331 Returns a L<DBIx::Simple> object for interacting with the database
 332 directly. Use this when no other function in this module is suitable.
 333
 334 =item B<user_list>
 335
 336 Returns an arrayref of the top 200 users.
 337
 338 =item B<user_entry>(I<$id>)
 339
 340 Returns a hashref describing the user I<$id>.
 341
 342 =item B<problem_list>([I<%args>])
 343
 344 Returns an arrayref of problems.
 345
 346 Takes the following named arguments:
 347
 348 =over
 349
 350 =item owner
 351
 352 Only show problems owned by this user
 353
 354 =item contest
 355
 356 Only show problems in this contest
 357
 358 =item private
 359
 360 If true, include private problems. Always true if contest is present.
 361
 362 =item solution
 363
 364 If true, include problem solutions
 365
 366 =back
 367
 368 =item B<problem_entry>(i<$id>, [I<$contest>])
 369
 370 Returns a hashref describing the problem I<$id>. If $contest is
 371 present, contest start and stop times are included, and the solution
 372 is deleted.
 373
 374 =item B<contest_list>
 375
 376 Returns an arrayref of contests.
 377
 378 =item B<contest_entry>(I<$id>)
 379
 380 Returns a hashref describing the contest I<$id>.
 381
 382 =item B<contest_has_problem>(I<$contest>, I<$problem>)
 383
 384 Returns true if the contest I<$contest> includes the problem
 385 I<$problem>, false otherwise.
 386
 387 =item B<job_list>([I<%args>])
 388
 389 In scalar context, returns an arrayref of jobs. In list context,
 390 returns an arrayref of jobs and a hashref of information about pages.
 391
 392 Takes the following named arguments:
 393
 394 =over
 395
 396 =item page
 397
 398 Show this page of the job log. Defaults to 1.
 399
 400 =item owner
 401
 402 Only show jobs submitted by this user.
 403
 404 =item contest
 405
 406 Only show jobs submitted in this contest.
 407
 408 =item problem
 409
 410 Only show jobs submitted for this problem.
 411
 412 =item result
 413
 414 Only show jobs with this result (see the constants in
 415 L<Gruntmaster::Daemon::Constants>).
 416
 417 =item private
 418
 419 If true, include private jobs. Defaults to false.
 420
 421 =back
 422
 423 =item B<job_entry>(I<$id>)
 424
 425 Returns a hashref describing the job I<$id>.
 426
 427 =item B<create_job>(I<%args>)
 428
 429 Insert a new job into the database. This function also updates the
 430 lastjob field for the job's owner.
 431
 432 =item B<standings>(I<$ct>)
 433
 434 Returns an arrayref of the standings of contest I<$ct>.
 435
 436 =item B<update_status>
 437
 438 Rebuilds the problem_status and contest_status tables.
 439
 440 =item B<rerun_job>(I<$id>)
 441
 442 Marks the job $id as pending and clears its results, so that it will
 443 be run again by the daemon.
 444
 445 =item B<take_job>(I<$daemon>)
 446
 447 Marks a random job as being run by I<$daemon>. Returns a hashref
 448 describing the job, or undef if no job was available.
 449
 450 =item B<finish_job>(I<$job>, I<$private>, I<%results>)
 451
 452 Updates the job $job with the results in %results. If $private is
 453 false, also updates the problem_status table.
 454
 455 =item B<open_problem>(I<$contest>, I<$problem>, I<$owner>, I<$time>)
 456
 457 Notes that I<$owner> has opened the problem I<$problem> of contest
 458 I<$contest> at time I<$time>. If the C<opens> table already contains
 459 this (I<$contest>, I<$problem>, I<$owner>) triplet, this function does
 460 nothing.
 461
 462 =back
 463
 464 =head1 AUTHOR
 465
 466 Marius Gavrilescu E<lt>marius@ieval.roE<gt>
 467
 468 =head1 COPYRIGHT AND LICENSE
 469
 470 Copyright (C) 2014-2015 by Marius Gavrilescu
 471
 472 This library is free software; you can redistribute it and/or modify
 473 it under the same terms as Perl itself, either Perl version 5.20.1 or,
 474 at your option, any later version of Perl 5 you may have available.
 475
 476
 477 =cut