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merged changes from rel-2-0-pr1-hardcopy-changes -sam
1 ################################################################################ 2 # WeBWorK mod_perl (c) 2000-2002 WeBWorK Project 3 # $Id$ 4 ################################################################################ 5 6 package WeBWorK::ContentGenerator::Problem; 7 8 =head1 NAME 9 10 WeBWorK::ContentGenerator::Problem - Allow a student to interact with a problem. 11 12 =cut 13 14 use strict; 15 use warnings; 16 use base qw(WeBWorK::ContentGenerator); 17 use CGI qw(); 18 use File::Temp qw(tempdir); 19 use WeBWorK::Form; 20 use WeBWorK::PG; 21 use WeBWorK::PG::IO; 22 use WeBWorK::Utils qw(writeLog encodeAnswers decodeAnswers ref2string); 23 24 ############################################################ 25 # 26 # user 27 # effectiveUser 28 # key 29 # 30 # displayMode 31 # showOldAnswers 32 # showCorrectAnswers 33 # showHints 34 # showSolutions 35 # 36 # AnSwEr# - answer blanks in problem 37 # 38 # redisplay - name of the "Redisplay Problem" button 39 # submitAnswers - name of "Submit Answers" button 40 # 41 ############################################################ 42 43 sub pre_header_initialize { 44 my ($self, $setName, $problemNumber) = @_; 45 my $courseEnv = $self->{courseEnvironment}; 46 my $r = $self->{r}; 47 my $userName = $r->param('user'); 48 my $effectiveUserName = $r->param('effectiveUser'); 49 50 ##### database setup ##### 51 52 my $cldb = WeBWorK::DB::Classlist->new($courseEnv); 53 my $wwdb = WeBWorK::DB::WW->new($courseEnv); 54 my $authdb = WeBWorK::DB::Auth->new($courseEnv); 55 56 my $user = $cldb->getUser($userName); 57 my $effectiveUser = $cldb->getUser($effectiveUserName); 58 my $set = $wwdb->getSet($effectiveUserName, $setName); 59 my $problem = $wwdb->getProblem($effectiveUserName, $setName, $problemNumber); 60 my $psvn = $wwdb->getPSVN($effectiveUserName, $setName); 61 my $permissionLevel = $authdb->getPermissions($userName); 62 63 ##### form processing ##### 64 65 # set options from form fields (see comment at top of file for names) 66 my $displayMode = $r->param("displayMode") || $courseEnv->{pg}->{options}->{displayMode}; 67 my $redisplay = $r->param("redisplay"); 68 my $submitAnswers = $r->param("submitAnswers"); 69 my $checkAnswers = $r->param("checkAnswers"); 70 my $previewAnswers = $r->param("previewAnswers"); 71 72 # coerce form fields into CGI::Vars format 73 my $formFields = { WeBWorK::Form->new_from_paramable($r)->Vars }; 74 75 ##### permissions ##### 76 77 # what does the user want to do? 78 my %want = ( 79 showOldAnswers => $r->param("showOldAnswers") || $courseEnv->{pg}->{options}->{showOldAnswers}, 80 showCorrectAnswers => $r->param("showCorrectAnswers") || $courseEnv->{pg}->{options}->{showCorrectAnswers}, 81 showHints => $r->param("showHints") || $courseEnv->{pg}->{options}->{showHints}, 82 showSolutions => $r->param("showSolutions") || $courseEnv->{pg}->{options}->{showSolutions}, 83 #recordAnswers => $r->param("recordAnswers") || 1, 84 recordAnswers => $submitAnswers, 85 ); 86 87 # are certain options enforced? 88 my %must = ( 89 showOldAnswers => 0, 90 showCorrectAnswers => 0, 91 showHints => 0, 92 showSolutions => 0, 93 recordAnswers => mustRecordAnswers($permissionLevel), 94 ); 95 96 # does the user have permission to use certain options? 97 my %can = ( 98 showOldAnswers => 1, 99 showCorrectAnswers => canShowCorrectAnswers($permissionLevel, $set->answer_date), 100 showHints => 1, 101 showSolutions => canShowSolutions($permissionLevel, $set->answer_date), 102 recordAnswers => canRecordAnswers($permissionLevel, $set->open_date, $set->due_date, 103 $problem->max_attempts, $problem->num_correct + $problem->num_incorrect + 1), 104 # num_correct+num_incorrect+1 -- as this happens before updating $problem 105 ); 106 107 # final values for options 108 my %will; 109 foreach (keys %must) { 110 $will{$_} = $can{$_} && ($want{$_} || $must{$_}); 111 } 112 113 ##### sticky answers ##### 114 115 if (not $submitAnswers and $will{showOldAnswers}) { 116 # do this only if new answers are NOT being submitted 117 my %oldAnswers = decodeAnswers($problem->last_answer); 118 $formFields->{$_} = $oldAnswers{$_} foreach keys %oldAnswers; 119 } 120 121 ##### translation ##### 122 123 my $pg = WeBWorK::PG->new( 124 $courseEnv, 125 $effectiveUser, 126 $r->param('key'), 127 $set, 128 $problem, 129 $psvn, 130 $formFields, 131 { # translation options 132 displayMode => $displayMode, 133 showHints => $will{showHints}, 134 showSolutions => $will{showSolutions}, 135 refreshMath2img => $will{showHints} || $will{showSolutions}, 136 processAnswers => 1, 137 }, 138 ); 139 140 ##### fix hint/solution options ##### 141 142 $can{showHints} &&= $pg->{flags}->{hintExists}; 143 $can{showSolutions} &&= $pg->{flags}->{solutionExists}; 144 145 ##### store fields ##### 146 147 $self->{cldb} = $cldb; 148 $self->{wwdb} = $wwdb; 149 $self->{authdb} = $authdb; 150 151 $self->{userName} = $userName; 152 $self->{user} = $user; 153 $self->{effectiveUser} = $effectiveUser; 154 $self->{set} = $set; 155 $self->{problem} = $problem; 156 $self->{permissionLevel} = $permissionLevel; 157 158 $self->{displayMode} = $displayMode; 159 $self->{redisplay} = $redisplay; 160 $self->{submitAnswers} = $submitAnswers; 161 $self->{checkAnswers} = $checkAnswers; 162 $self->{previewAnswers} = $previewAnswers; 163 $self->{formFields} = $formFields; 164 165 $self->{want} = \%want; 166 $self->{must} = \%must; 167 $self->{can} = \%can; 168 $self->{will} = \%will; 169 170 $self->{pg} = $pg; 171 } 172 173 sub if_warnings($$) { 174 my ($self, $arg) = @_; 175 return $self->{pg}->{warnings} ne ""; 176 } 177 178 sub if_errors($$) { 179 my ($self, $arg) = @_; 180 return $self->{pg}->{flags}->{error_flag}; 181 } 182 183 sub head { 184 my $self = shift; 185 186 return $self->{pg}->{head_text} if $self->{pg}->{head_text}; 187 } 188 189 sub path { 190 my $self = shift; 191 my $args = $_[-1]; 192 my $setName = $self->{set}->id; 193 my $problemNumber = $self->{problem}->id; 194 195 my $ce = $self->{courseEnvironment}; 196 my $root = $ce->{webworkURLs}->{root}; 197 my $courseName = $ce->{courseName}; 198 return $self->pathMacro($args, 199 "Home" => "$root", 200 $courseName => "$root/$courseName", 201 $setName => "$root/$courseName/$setName", 202 "Problem $problemNumber" => "", 203 ); 204 } 205 206 sub siblings { 207 my $self = shift; 208 my $setName = $self->{set}->id; 209 my $problemNumber = $self->{problem}->id; 210 211 my $ce = $self->{courseEnvironment}; 212 my $root = $ce->{webworkURLs}->{root}; 213 my $courseName = $ce->{courseName}; 214 215 print CGI::strong("Problems"), CGI::br(); 216 217 my $wwdb = $self->{wwdb}; 218 my $effectiveUser = $self->{r}->param("effectiveUser"); 219 my @problems; 220 push @problems, $wwdb->getProblem($effectiveUser, $setName, $_) 221 foreach ($wwdb->getProblems($effectiveUser, $setName)); 222 foreach my $problem (sort { $a->id <=> $b->id } @problems) { 223 print CGI::a({-href=>"$root/$courseName/$setName/".$problem->id."/?" 224 . $self->url_authen_args . "&displayMode=" . $self->{displayMode}}, 225 "Problem ".$problem->id), CGI::br(); 226 } 227 } 228 229 sub nav { 230 my $self = shift; 231 my $args = $_[-1]; 232 my $setName = $self->{set}->id; 233 my $problemNumber = $self->{problem}->id; 234 235 my $ce = $self->{courseEnvironment}; 236 my $root = $ce->{webworkURLs}->{root}; 237 my $courseName = $ce->{courseName}; 238 239 my $wwdb = $self->{wwdb}; 240 my $effectiveUser = $self->{r}->param("effectiveUser"); 241 my $tail = "&displayMode=".$self->{displayMode}; 242 243 my @links = ("Problem List" => "$root/$courseName/$setName"); 244 245 my $prevProblem = $wwdb->getProblem($effectiveUser, $setName, $problemNumber-1); 246 my $nextProblem = $wwdb->getProblem($effectiveUser, $setName, $problemNumber+1); 247 unshift @links, "Previous Problem" => $prevProblem 248 ? "$root/$courseName/$setName/".$prevProblem->id 249 : ""; 250 push @links, "Next Problem" => $nextProblem 251 ? "$root/$courseName/$setName/".$nextProblem->id 252 : ""; 253 254 return $self->navMacro($args, $tail, @links); 255 } 256 257 sub title { 258 my $self = shift; 259 my $setName = $self->{set}->id; 260 my $problemNumber = $self->{problem}->id; 261 262 return "$setName : Problem $problemNumber"; 263 } 264 265 sub body { 266 my $self = shift; 267 268 # unpack some useful variables 269 my $r = $self->{r}; 270 my $wwdb = $self->{wwdb}; 271 my $set = $self->{set}; 272 my $problem = $self->{problem}; 273 my $permissionLevel = $self->{permissionLevel}; 274 my $submitAnswers = $self->{submitAnswers}; 275 my $checkAnswers = $self->{checkAnswers}; 276 my $previewAnswers = $self->{previewAnswers}; 277 my %want = %{ $self->{want} }; 278 my %can = %{ $self->{can} }; 279 my %must = %{ $self->{must} }; 280 my %will = %{ $self->{will} }; 281 my $pg = $self->{pg}; 282 283 ##### translation errors? ##### 284 285 if ($pg->{flags}->{error_flag}) { 286 return $self->errorOutput($pg->{errors}, $pg->{body_text}); 287 } 288 289 ##### answer processing ##### 290 291 # if answers were submitted: 292 if ($submitAnswers) { 293 # store answers in DB for sticky answers 294 my %answersToStore; 295 my %answerHash = %{ $pg->{answers} }; 296 $answersToStore{$_} = $answerHash{$_}->{original_student_ans} 297 foreach (keys %answerHash); 298 my $answerString = encodeAnswers(%answersToStore, 299 @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }); 300 $problem->last_answer($answerString); 301 $wwdb->setProblem($problem); 302 303 # store state in DB if it makes sense 304 if ($will{recordAnswers}) { 305 $problem->attempted(1); 306 $problem->status($pg->{state}->{recorded_score}); 307 $problem->num_correct($pg->{state}->{num_of_correct_ans}); 308 $problem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 309 $wwdb->setProblem($problem); 310 # write to the transaction log, just to make sure 311 writeLog($self->{courseEnvironment}, "transaction", 312 $problem->id."\t". 313 $problem->set_id."\t". 314 $problem->login_id."\t". 315 $problem->source_file."\t". 316 $problem->value."\t". 317 $problem->max_attempts."\t". 318 $problem->problem_seed."\t". 319 $problem->status."\t". 320 $problem->attempted."\t". 321 $problem->last_answer."\t". 322 $problem->num_correct."\t". 323 $problem->num_incorrect 324 ); 325 } 326 } 327 328 ##### output ##### 329 330 # attempt summary 331 if ($submitAnswers or $will{showCorrectAnswers}) { 332 # print this if user submitted answers OR requested correct answers 333 print $self->attemptResults($pg, $submitAnswers, 334 $will{showCorrectAnswers}, 335 $pg->{flags}->{showPartialCorrectAnswers}, 0); 336 } elsif ($checkAnswers) { 337 # print this if user previewed answers 338 print $self->attemptResults($pg, 1, 0, 1, 0); 339 # show attempt answers 340 # don't show correct answers 341 # show attempt results (correctness) 342 # don't show attempt previews 343 } elsif ($previewAnswers) { 344 # print this if user previewed answers 345 print $self->attemptResults($pg, 1, 0, 0, 1); 346 # show attempt answers 347 # don't show correct answers 348 # don't show attempt results (correctness) 349 # show attempt previews 350 } 351 352 # score summary 353 my $attempts = $problem->num_correct + $problem->num_incorrect; 354 my $attemptsNoun = $attempts != 1 ? "times" : "time"; 355 my $lastScore = int ($problem->status * 100) . "%"; 356 my ($attemptsLeft, $attemptsLeftNoun); 357 if ($problem->max_attempts == -1) { 358 # unlimited attempts 359 $attemptsLeft = "unlimited"; 360 $attemptsLeftNoun = "attempts"; 361 } else { 362 $attemptsLeft = $problem->max_attempts - $attempts; 363 $attemptsLeftNoun = $attemptsLeft == 1 ? "attempt" : "attempts"; 364 } 365 my $setClosedMessage; 366 if (time < $set->open_date or time > $set->due_date) { 367 $setClosedMessage = "This problem set is closed."; 368 if ($permissionLevel > 0) { 369 $setClosedMessage .= " Since you are a privileged user, additional attempts will be recorded."; 370 } else { 371 $setClosedMessage .= " Additional attempts will not be recorded."; 372 } 373 } 374 print CGI::p( 375 "You have attempted this problem $attempts $attemptsNoun.", CGI::br(), 376 $problem->attempted 377 ? "Your recorded score is $lastScore." . CGI::br() 378 : "", 379 "You have $attemptsLeft $attemptsLeftNoun remaining.", CGI::br(), 380 $setClosedMessage, 381 ); 382 383 print CGI::hr(); 384 385 # main form 386 print 387 CGI::startform("POST", $r->uri), 388 $self->hidden_authen_fields, 389 CGI::p(CGI::i($pg->{result}->{msg})), 390 CGI::p($pg->{body_text}), 391 CGI::p( 392 ($can{recordAnswers} 393 ? CGI::submit(-name=>"submitAnswers", 394 -label=>"Submit Answers") 395 : ""), 396 ($can{recordAnswers} 397 ? CGI::submit(-name=>"checkAnswers", 398 -label=>"Check Answers") 399 : ""), 400 CGI::submit(-name=>"previewAnswers", 401 -label=>"Preview Answers"), 402 ), 403 $self->viewOptions(), 404 CGI::endform(); 405 406 # feedback form 407 my $ce = $self->{courseEnvironment}; 408 my $root = $ce->{webworkURLs}->{root}; 409 my $courseName = $ce->{courseName}; 410 my $feedbackURL = "$root/$courseName/feedback/"; 411 print 412 CGI::startform("POST", $feedbackURL), 413 $self->hidden_authen_fields, 414 CGI::hidden("module", __PACKAGE__), 415 CGI::hidden("set", $set->id), 416 CGI::hidden("problem", $problem->id), 417 CGI::hidden("displayMode", $self->{displayMode}), 418 CGI::hidden("showOldAnswers", $will{showOldAnswers}), 419 CGI::hidden("showCorrectAnswers", $will{showCorrectAnswers}), 420 CGI::hidden("showHints", $will{showHints}), 421 CGI::hidden("showSolutions", $will{showSolutions}), 422 CGI::p({-align=>"right"}, 423 CGI::submit(-name=>"feedbackForm", -label=>"Send Feedback") 424 ), 425 CGI::endform(); 426 427 # warning output 428 if ($pg->{warnings} ne "") { 429 print CGI::hr(), $self->warningOutput($pg->{warnings}); 430 } 431 432 # debugging stuff 433 #print 434 # CGI::hr(), 435 # CGI::h2("debugging information"), 436 # CGI::h3("form fields"), 437 # ref2string($self->{formFields}), 438 # CGI::h3("user object"), 439 # ref2string($self->{user}), 440 # CGI::h3("set object"), 441 # ref2string($set), 442 # CGI::h3("problem object"), 443 # ref2string($problem), 444 # CGI::h3("PG object"), 445 # ref2string($pg, {'WeBWorK::PG::Translator' => 1}); 446 447 return ""; 448 } 449 450 ##### output utilities ##### 451 452 sub attemptResults($$$$$) { 453 my $self = shift; 454 my $pg = shift; 455 my $showAttemptAnswers = shift; 456 my $showCorrectAnswers = shift; 457 my $showAttemptResults = $showAttemptAnswers && shift; 458 my $showAttemptPreview = shift || 0; 459 my $problemResult = $pg->{result}; # the overall result of the problem 460 my @answerNames = @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }; 461 462 my $showMessages = $showAttemptAnswers && grep { $pg->{answers}->{$_}->{ans_message} } @answerNames; 463 464 my $header = CGI::th("part"); 465 $header .= $showAttemptAnswers ? CGI::th("entered") : ""; 466 $header .= $showAttemptPreview ? CGI::th("preview") : ""; 467 $header .= $showCorrectAnswers ? CGI::th("correct") : ""; 468 $header .= $showAttemptResults ? CGI::th("result") : ""; 469 $header .= $showMessages ? CGI::th("messages") : ""; 470 my @tableRows = ( $header ); 471 my $numCorrect; 472 foreach my $name (@answerNames) { 473 my $answerResult = $pg->{answers}->{$name}; 474 my $studentAnswer = $answerResult->{student_ans}; # original_student_ans 475 my $preview = ($showAttemptPreview 476 ? $self->previewAnswer($answerResult) 477 : ""); 478 my $correctAnswer = $answerResult->{correct_ans}; 479 my $answerScore = $answerResult->{score}; 480 my $answerMessage = $showMessages ? $answerResult->{ans_message} : ""; 481 482 $numCorrect += $answerScore > 0; 483 my $resultString = $answerScore ? "correct" : "incorrect"; 484 485 # get rid of the goofy prefix on the answer names (supposedly, the format 486 # of the answer names is changeable. this only fixes it for "AnSwEr" 487 $name =~ s/^AnSwEr//; 488 489 my $row = CGI::td($name); 490 $row .= $showAttemptAnswers ? CGI::td($studentAnswer) : ""; 491 $row .= $showAttemptPreview ? CGI::td($preview) : ""; 492 $row .= $showCorrectAnswers ? CGI::td($correctAnswer) : ""; 493 $row .= $showAttemptResults ? CGI::td($resultString) : ""; 494 $row .= $answerMessage ? CGI::td($answerMessage) : ""; 495 push @tableRows, $row; 496 } 497 498 my $numCorrectNoun = $numCorrect == 1 ? "question" : "questions"; 499 my $scorePercent = int ($problemResult->{score} * 100) . "\%"; 500 my $summary = "On this attempt, you answered $numCorrect $numCorrectNoun out of " 501 . scalar @answerNames . " correct, for a score of $scorePercent."; 502 return CGI::table({-border=>1}, CGI::Tr(\@tableRows)) . CGI::p($summary); 503 } 504 505 sub viewOptions($) { 506 my $self = shift; 507 my $displayMode = $self->{displayMode}; 508 my %must = %{ $self->{must} }; 509 my %can = %{ $self->{can} }; 510 my %will = %{ $self->{will} }; 511 512 my $optionLine; 513 $can{showOldAnswers} and $optionLine .= join "", 514 "Show: ", 515 CGI::checkbox( 516 -name => "showOldAnswers", 517 -checked => $will{showOldAnswers}, 518 -label => "Saved answers", 519 ), " "; 520 $can{showCorrectAnswers} and $optionLine .= join "", 521 CGI::checkbox( 522 -name => "showCorrectAnswers", 523 -checked => $will{showCorrectAnswers}, 524 -label => "Correct answers", 525 ), " "; 526 $can{showHints} and $optionLine .= join "", 527 CGI::checkbox( 528 -name => "showHints", 529 -checked => $will{showHints}, 530 -label => "Hints", 531 ), " "; 532 $can{showSolutions} and $optionLine .= join "", 533 CGI::checkbox( 534 -name => "showSolutions", 535 -checked => $will{showSolutions}, 536 -label => "Solutions", 537 ), " "; 538 $optionLine and $optionLine .= join "", CGI::br(); 539 540 return CGI::div({-style=>"border: thin groove; padding: 1ex; margin: 2ex"}, 541 "View equations as: ", 542 CGI::radio_group( 543 -name => "displayMode", 544 -values => ['plainText', 'formattedText', 'images'], 545 -default => $displayMode, 546 -labels => { 547 plainText => "plain text", 548 formattedText => "formatted text", 549 images => "images", 550 } 551 ), CGI::br(), 552 $optionLine, 553 CGI::submit(-name=>"redisplay", -label=>"Redisplay Problem"), 554 ); 555 } 556 557 sub previewAnswer($$) { 558 my ($self, $answerResult) = @_; 559 my $ce = $self->{courseEnvironment}; 560 my $effectiveUser = $self->{effectiveUser}; 561 my $set = $self->{set}; 562 my $problem = $self->{problem}; 563 my $displayMode = $self->{displayMode}; 564 565 # note: right now, we have to do things completely differently when we are 566 # rendering math from INSIDE the translator and from OUTSIDE the translator. 567 # so we'll just deal with each case explicitly here. there's some code 568 # duplication that can be dealt with later by abstracting out tth/dvipng/etc. 569 570 my $tex = $answerResult->{preview_latex_string}; 571 572 return "" unless $tex; 573 574 if ($displayMode eq "plainText") { 575 return $tex; 576 } elsif ($displayMode eq "formattedText") { 577 my $tthCommand = $ce->{externalPrograms}->{tth} 578 . " -L -f5 -r 2> /dev/null <<END_OF_INPUT; echo > /dev/null\n" 579 . "\\(".$tex."\\)\n" 580 . "END_OF_INPUT\n"; 581 582 # call tth 583 my $result = `$tthCommand`; 584 if ($?) { 585 return "<b>[tth failed: $? $@]</b>"; 586 } 587 return $result; 588 } elsif ($displayMode eq "images") { 589 # how are we going to name this? 590 my $targetPathCommon = "/png/" 591 . $effectiveUser->id . "." 592 . $set->id . "." 593 . $problem->id . "." 594 . $answerResult->{ans_name} . ".png"; 595 596 # figure out where to put things 597 my $wd = tempdir("webwork-dvipng-XXXXXXXX", DIR => $ce->{courseDirs}->{html_temp}); 598 my $latex = $ce->{externalPrograms}->{latex}; 599 my $dvipng = $ce->{externalPrograms}->{dvipng}; 600 my $targetPath = $ce->{courseDirs}->{html_temp} . $targetPathCommon; 601 # should use surePathToTmpFile, but we have to 602 # isolate it from the problem enivronment first 603 my $targetURL = $ce->{courseURLs}->{html_temp} . $targetPathCommon; 604 605 # call dvipng to generate a preview 606 dvipng($wd, $latex, $dvipng, $tex, $targetPath); 607 if (-e $targetPath) { 608 return "<img src=\"$targetURL\" alt=\"$tex\" />"; 609 } else { 610 return "<b>[math2img failed]</b>"; 611 } 612 } 613 } 614 615 ##### permission queries ##### 616 617 # this stuff should be abstracted out into the permissions system 618 # however, the permission system only knows about things in the 619 # course environment and the username. hmmm... 620 621 # also, i should fix these so that they have a consistent calling 622 # format -- perhaps: 623 # canPERM($courseEnv, $user, $set, $problem, $permissionLevel) 624 625 sub canShowCorrectAnswers($$) { 626 my ($permissionLevel, $answerDate) = @_; 627 return $permissionLevel > 0 || time > $answerDate; 628 } 629 630 sub canShowSolutions($$) { 631 my ($permissionLevel, $answerDate) = @_; 632 return canShowCorrectAnswers($permissionLevel, $answerDate); 633 } 634 635 sub canRecordAnswers($$$$$) { 636 my ($permissionLevel, $openDate, $dueDate, $maxAttempts, $attempts) = @_; 637 my $permHigh = $permissionLevel > 0; 638 my $timeOK = time >= $openDate && time <= $dueDate; 639 my $attemptsOK = $maxAttempts == -1 || $attempts <= $maxAttempts; 640 my $recordAnswers = $permHigh || ($timeOK && $attemptsOK); 641 return $recordAnswers; 642 } 643 644 sub mustRecordAnswers($) { 645 my ($permissionLevel) = @_; 646 return $permissionLevel == 0; 647 } 648 649 1;
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