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Fixed soem ugliness I introduced into the formatting. Nothing major. -Dennis
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 $previewAnswers = $r->param("previewAnswers"); 70 71 # coerce form fields into CGI::Vars format 72 my $formFields = { WeBWorK::Form->new_from_paramable($r)->Vars }; 73 74 ##### permissions ##### 75 76 # what does the user want to do? 77 my %want = ( 78 showOldAnswers => $r->param("showOldAnswers") || $courseEnv->{pg}->{options}->{showOldAnswers}, 79 showCorrectAnswers => $r->param("showCorrectAnswers") || $courseEnv->{pg}->{options}->{showCorrectAnswers}, 80 showHints => $r->param("showHints") || $courseEnv->{pg}->{options}->{showHints}, 81 showSolutions => $r->param("showSolutions") || $courseEnv->{pg}->{options}->{showSolutions}, 82 recordAnswers => $r->param("recordAnswers") || 1, 83 ); 84 85 # are certain options enforced? 86 my %must = ( 87 showOldAnswers => 0, 88 showCorrectAnswers => 0, 89 showHints => 0, 90 showSolutions => 0, 91 recordAnswers => mustRecordAnswers($permissionLevel), 92 ); 93 94 # does the user have permission to use certain options? 95 my %can = ( 96 showOldAnswers => 1, 97 showCorrectAnswers => canShowCorrectAnswers($permissionLevel, $set->answer_date), 98 showHints => 1, 99 showSolutions => canShowSolutions($permissionLevel, $set->answer_date), 100 recordAnswers => canRecordAnswers($permissionLevel, $set->open_date, $set->due_date, 101 $problem->max_attempts, $problem->num_correct + $problem->num_incorrect + 1), 102 # num_correct+num_incorrect+1 -- as this happens before updating $problem 103 ); 104 105 # final values for options 106 my %will; 107 foreach (keys %must) { 108 $will{$_} = $can{$_} && ($want{$_} || $must{$_}); 109 } 110 111 ##### sticky answers ##### 112 113 if (not $submitAnswers and $will{showOldAnswers}) { 114 # do this only if new answers are NOT being submitted 115 my %oldAnswers = decodeAnswers($problem->last_answer); 116 $formFields->{$_} = $oldAnswers{$_} foreach keys %oldAnswers; 117 } 118 119 ##### translation ##### 120 121 my $pg = WeBWorK::PG->new( 122 $courseEnv, 123 $effectiveUser, 124 $r->param('key'), 125 $set, 126 $problem, 127 $psvn, 128 $formFields, 129 { # translation options 130 displayMode => $displayMode, 131 showHints => $will{showHints}, 132 showSolutions => $will{showSolutions}, 133 refreshMath2img => $will{showHints} || $will{showSolutions}, 134 processAnswers => 1, 135 }, 136 ); 137 138 ##### fix hint/solution options ##### 139 140 $can{showHints} &&= $pg->{flags}->{hintExists}; 141 $can{showSolutions} &&= $pg->{flags}->{solutionExists}; 142 143 ##### store fields ##### 144 145 $self->{cldb} = $cldb; 146 $self->{wwdb} = $wwdb; 147 $self->{authdb} = $authdb; 148 149 $self->{userName} = $userName; 150 $self->{user} = $user; 151 $self->{effectiveUser} = $effectiveUser; 152 $self->{set} = $set; 153 $self->{problem} = $problem; 154 $self->{permissionLevel} = $permissionLevel; 155 156 $self->{displayMode} = $displayMode; 157 $self->{redisplay} = $redisplay; 158 $self->{submitAnswers} = $submitAnswers; 159 $self->{previewAnswers} = $previewAnswers; 160 $self->{formFields} = $formFields; 161 162 $self->{want} = \%want; 163 $self->{must} = \%must; 164 $self->{can} = \%can; 165 $self->{will} = \%will; 166 167 $self->{pg} = $pg; 168 } 169 170 sub if_warnings($$) { 171 my ($self, $arg) = @_; 172 return $self->{pg}->{warnings} ne ""; 173 } 174 175 sub if_errors($$) { 176 my ($self, $arg) = @_; 177 return $self->{pg}->{flags}->{error_flag}; 178 } 179 180 sub head { 181 my $self = shift; 182 183 return $self->{pg}->{head_text} if $self->{pg}->{head_text}; 184 } 185 186 sub path { 187 my $self = shift; 188 my $args = $_[-1]; 189 my $setName = $self->{set}->id; 190 my $problemNumber = $self->{problem}->id; 191 192 my $ce = $self->{courseEnvironment}; 193 my $root = $ce->{webworkURLs}->{root}; 194 my $courseName = $ce->{courseName}; 195 return $self->pathMacro($args, 196 "Home" => "$root", 197 $courseName => "$root/$courseName", 198 $setName => "$root/$courseName/$setName", 199 "Problem $problemNumber" => "", 200 ); 201 } 202 203 sub siblings { 204 my $self = shift; 205 my $setName = $self->{set}->id; 206 my $problemNumber = $self->{problem}->id; 207 208 my $ce = $self->{courseEnvironment}; 209 my $root = $ce->{webworkURLs}->{root}; 210 my $courseName = $ce->{courseName}; 211 212 print CGI::strong("Problems"), CGI::br(); 213 214 my $wwdb = $self->{wwdb}; 215 my $effectiveUser = $self->{r}->param("effectiveUser"); 216 my @problems; 217 push @problems, $wwdb->getProblem($effectiveUser, $setName, $_) 218 foreach ($wwdb->getProblems($effectiveUser, $setName)); 219 foreach my $problem (sort { $a->id <=> $b->id } @problems) { 220 print CGI::a({-href=>"$root/$courseName/$setName/".$problem->id."/?" 221 . $self->url_authen_args . "&displayMode=" . $self->{displayMode}}, 222 "Problem ".$problem->id), CGI::br(); 223 } 224 } 225 226 sub nav { 227 my $self = shift; 228 my $args = $_[-1]; 229 my $setName = $self->{set}->id; 230 my $problemNumber = $self->{problem}->id; 231 232 my $ce = $self->{courseEnvironment}; 233 my $root = $ce->{webworkURLs}->{root}; 234 my $courseName = $ce->{courseName}; 235 236 my $wwdb = $self->{wwdb}; 237 my $effectiveUser = $self->{r}->param("effectiveUser"); 238 my $tail = "&displayMode=".$self->{displayMode}; 239 240 my @links = ("Problem List" => "$root/$courseName/$setName"); 241 242 my $prevProblem = $wwdb->getProblem($effectiveUser, $setName, $problemNumber-1); 243 my $nextProblem = $wwdb->getProblem($effectiveUser, $setName, $problemNumber+1); 244 unshift @links, "Previous Problem" => $prevProblem 245 ? "$root/$courseName/$setName/".$prevProblem->id 246 : ""; 247 push @links, "Next Problem" => $nextProblem 248 ? "$root/$courseName/$setName/".$nextProblem->id 249 : ""; 250 251 return $self->navMacro($args, $tail, @links); 252 } 253 254 sub title { 255 my $self = shift; 256 my $setName = $self->{set}->id; 257 my $problemNumber = $self->{problem}->id; 258 259 return "$setName : Problem $problemNumber"; 260 } 261 262 sub body { 263 my $self = shift; 264 265 # unpack some useful variables 266 my $r = $self->{r}; 267 my $wwdb = $self->{wwdb}; 268 my $set = $self->{set}; 269 my $problem = $self->{problem}; 270 my $permissionLevel = $self->{permissionLevel}; 271 my $submitAnswers = $self->{submitAnswers}; 272 my $previewAnswers = $self->{previewAnswers}; 273 my %will = %{ $self->{will} }; 274 my $pg = $self->{pg}; 275 276 ##### translation errors? ##### 277 278 if ($pg->{flags}->{error_flag}) { 279 return translationError($pg->{errors}, $pg->{body_text}); 280 } 281 282 ##### answer processing ##### 283 284 # if answers were submitted: 285 if ($submitAnswers) { 286 # store answers in DB for sticky answers 287 my %answersToStore; 288 my %answerHash = %{ $pg->{answers} }; 289 $answersToStore{$_} = $answerHash{$_}->{original_student_ans} 290 foreach (keys %answerHash); 291 my $answerString = encodeAnswers(%answersToStore, 292 @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }); 293 $problem->last_answer($answerString); 294 $wwdb->setProblem($problem); 295 296 # store state in DB if it makes sense 297 if ($will{recordAnswers}) { 298 $problem->attempted(1); 299 $problem->status($pg->{state}->{recorded_score}); 300 $problem->num_correct($pg->{state}->{num_of_correct_ans}); 301 $problem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 302 $wwdb->setProblem($problem); 303 # write to the transaction log, just to make sure 304 writeLog($self->{courseEnvironment}, "transaction", 305 $problem->id."\t". 306 $problem->set_id."\t". 307 $problem->login_id."\t". 308 $problem->source_file."\t". 309 $problem->value."\t". 310 $problem->max_attempts."\t". 311 $problem->problem_seed."\t". 312 $problem->status."\t". 313 $problem->attempted."\t". 314 $problem->last_answer."\t". 315 $problem->num_correct."\t". 316 $problem->num_incorrect 317 ); 318 } 319 } 320 321 ##### output ##### 322 323 # attempt summary 324 if ($submitAnswers or $will{showCorrectAnswers}) { 325 # print this if user submitted answers OR requested correct answers 326 print $self->attemptResults($pg, $submitAnswers, $will{showCorrectAnswers}, 327 $pg->{flags}->{showPartialCorrectAnswers}, 0); 328 } elsif ($previewAnswers) { 329 # print this if user previewed answers 330 print $self->attemptResults($pg, 1, 0, 0, 1); 331 # don't show correctness 332 # don't show correct answers 333 } 334 335 # score summary 336 my $attempts = $problem->num_correct + $problem->num_incorrect; 337 my $attemptsNoun = $attempts != 1 ? "times" : "time"; 338 my $lastScore = int ($problem->status * 100) . "%"; 339 my ($attemptsLeft, $attemptsLeftNoun); 340 if ($problem->max_attempts == -1) { 341 # unlimited attempts 342 $attemptsLeft = "unlimited"; 343 $attemptsLeftNoun = "attempts"; 344 } else { 345 $attemptsLeft = $problem->max_attempts - $attempts; 346 $attemptsLeftNoun = $attemptsLeft == 1 ? "attempt" : "attempts"; 347 } 348 my $setClosedMessage; 349 if (time < $set->open_date or time > $set->due_date) { 350 $setClosedMessage = "This problem set is closed."; 351 if ($permissionLevel > 0) { 352 $setClosedMessage .= " Since you are a privileged user, additional attempts will be recorded."; 353 } else { 354 $setClosedMessage .= " Additional attempts will not be recorded."; 355 } 356 } 357 print CGI::p( 358 "You have attempted this problem $attempts $attemptsNoun.", CGI::br(), 359 $problem->attempted 360 ? "Your recorded score is $lastScore." . CGI::br() 361 : "", 362 "You have $attemptsLeft $attemptsLeftNoun remaining.", CGI::br(), 363 $setClosedMessage, 364 ); 365 366 print CGI::hr(); 367 368 # main form 369 print 370 CGI::startform("POST", $r->uri), 371 $self->hidden_authen_fields, 372 CGI::p(CGI::i($pg->{result}->{msg})), 373 CGI::p($pg->{body_text}), 374 CGI::p( 375 CGI::submit(-name=>"submitAnswers", -label=>"Submit Answers"), 376 CGI::submit(-name=>"previewAnswers", -label=>"Preview Answers"), 377 ), 378 $self->viewOptions(), 379 CGI::endform(); 380 381 # feedback form 382 my $ce = $self->{courseEnvironment}; 383 my $root = $ce->{webworkURLs}->{root}; 384 my $courseName = $ce->{courseName}; 385 my $feedbackURL = "$root/$courseName/feedback/"; 386 print 387 CGI::startform("POST", $feedbackURL), 388 $self->hidden_authen_fields, 389 CGI::hidden("module", __PACKAGE__), 390 CGI::hidden("set", $set->id), 391 CGI::hidden("problem", $problem->id), 392 CGI::hidden("displayMode", $self->{displayMode}), 393 CGI::hidden("showOldAnswers", $will{showOldAnswers}), 394 CGI::hidden("showCorrectAnswers", $will{showCorrectAnswers}), 395 CGI::hidden("showHints", $will{showHints}), 396 CGI::hidden("showSolutions", $will{showSolutions}), 397 CGI::p({-align=>"right"}, 398 CGI::submit(-name=>"feedbackForm", -label=>"Send Feedback") 399 ), 400 CGI::endform(); 401 402 # warning output 403 if ($pg->{warnings} ne "") { 404 print CGI::hr(), warningOutput($pg->{warnings}); 405 } 406 407 # debugging stuff 408 #print 409 # CGI::hr(), 410 # CGI::h2("debugging information"), 411 # CGI::h3("form fields"), 412 # ref2string($self->{formFields}), 413 # CGI::h3("user object"), 414 # ref2string($self->{user}), 415 # CGI::h3("set object"), 416 # ref2string($set), 417 # CGI::h3("problem object"), 418 # ref2string($problem), 419 # CGI::h3("PG object"), 420 # ref2string($pg, {'WeBWorK::PG::Translator' => 1}); 421 422 return ""; 423 } 424 425 ##### output utilities ##### 426 427 # this is used by ProblemSet.pm too, so don't fuck it up 428 sub translationError($$) { 429 my ($error, $details) = @_; 430 return 431 CGI::h2("Software Error"), 432 CGI::p(<<EOF), 433 WeBWorK has encountered a software error while attempting to process this problem. 434 It is likely that there is an error in the problem itself. 435 If you are a student, contact your professor to have the error corrected. 436 If you are a professor, please consut the error output below for more informaiton. 437 EOF 438 CGI::h3("Error messages"), CGI::blockquote(CGI::pre($error)), 439 CGI::h3("Error context"), CGI::blockquote(CGI::pre($details)); 440 } 441 442 # this is used by ProblemSet.pm too, so don't fuck it up 443 sub warningOutput($) { 444 my $warnings = shift; 445 446 return 447 CGI::h2("Software Warnings"), 448 CGI::p(<<EOF), 449 WeBWorK has encountered warnings while attempting to process this problem. 450 It is likely that this indicates an error or ambiguity in the problem itself. 451 If you are a student, contact your professor to have the problem corrected. 452 If you are a professor, please consut the error output below for more informaiton. 453 EOF 454 CGI::h3("Warning messages"), 455 CGI::blockquote(CGI::pre($warnings)), 456 ; 457 } 458 459 sub attemptResults($$$$$) { 460 my $self = shift; 461 my $pg = shift; 462 my $showAttemptAnswers = shift; 463 my $showCorrectAnswers = shift; 464 my $showAttemptResults = $showAttemptAnswers && shift; 465 my $showAttemptPreview = shift || 0; 466 my $problemResult = $pg->{result}; # the overall result of the problem 467 my @answerNames = @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }; 468 469 my $showMessages = $showAttemptAnswers && grep { $pg->{answers}->{$_}->{ans_message} } @answerNames; 470 471 my $header = CGI::th("part"); 472 $header .= $showAttemptAnswers ? CGI::th("entered") : ""; 473 $header .= $showAttemptPreview ? CGI::th("preview") : ""; 474 $header .= $showCorrectAnswers ? CGI::th("correct") : ""; 475 $header .= $showAttemptResults ? CGI::th("result") : ""; 476 $header .= $showMessages ? CGI::th("messages") : ""; 477 my @tableRows = ( $header ); 478 my $numCorrect; 479 foreach my $name (@answerNames) { 480 my $answerResult = $pg->{answers}->{$name}; 481 my $studentAnswer = $answerResult->{student_ans}; # original_student_ans 482 my $preview = ($showAttemptPreview 483 ? $self->previewAnswer($answerResult) 484 : ""); 485 my $correctAnswer = $answerResult->{correct_ans}; 486 my $answerScore = $answerResult->{score}; 487 my $answerMessage = $showMessages ? $answerResult->{ans_message} : ""; 488 489 $numCorrect += $answerScore > 0; 490 my $resultString = $answerScore ? "correct" : "incorrect"; 491 492 # get rid of the goofy prefix on the answer names (supposedly, the format 493 # of the answer names is changeable. this only fixes it for "AnSwEr" 494 $name =~ s/^AnSwEr//; 495 496 my $row = CGI::td($name); 497 $row .= $showAttemptAnswers ? CGI::td($studentAnswer) : ""; 498 $row .= $showAttemptPreview ? CGI::td($preview) : ""; 499 $row .= $showCorrectAnswers ? CGI::td($correctAnswer) : ""; 500 $row .= $showAttemptResults ? CGI::td($resultString) : ""; 501 $row .= $answerMessage ? CGI::td($answerMessage) : ""; 502 push @tableRows, $row; 503 } 504 505 my $numCorrectNoun = $numCorrect == 1 ? "question" : "questions"; 506 my $scorePercent = int ($problemResult->{score} * 100) . "\%"; 507 my $summary = "On this attempt, you answered $numCorrect $numCorrectNoun out of " 508 . scalar @answerNames . " correct, for a score of $scorePercent."; 509 return CGI::table({-border=>1}, CGI::Tr(\@tableRows)) . CGI::p($summary); 510 } 511 512 sub viewOptions($) { 513 my $self = shift; 514 my $displayMode = $self->{displayMode}; 515 my %must = %{ $self->{must} }; 516 my %can = %{ $self->{can} }; 517 my %will = %{ $self->{will} }; 518 519 my $optionLine; 520 $can{showOldAnswers} and $optionLine .= join "", 521 "Show: ", 522 CGI::checkbox( 523 -name => "showOldAnswers", 524 -checked => $will{showOldAnswers}, 525 -label => "Saved answers", 526 ), " "; 527 $can{showCorrectAnswers} and $optionLine .= join "", 528 CGI::checkbox( 529 -name => "showCorrectAnswers", 530 -checked => $will{showCorrectAnswers}, 531 -label => "Correct answers", 532 ), " "; 533 $can{showHints} and $optionLine .= join "", 534 CGI::checkbox( 535 -name => "showHints", 536 -checked => $will{showHints}, 537 -label => "Hints", 538 ), " "; 539 $can{showSolutions} and $optionLine .= join "", 540 CGI::checkbox( 541 -name => "showSolutions", 542 -checked => $will{showSolutions}, 543 -label => "Solutions", 544 ), " "; 545 $optionLine and $optionLine .= join "", CGI::br(); 546 547 return CGI::div({-style=>"border: thin groove; padding: 1ex; margin: 2ex"}, 548 "View equations as: ", 549 CGI::radio_group( 550 -name => "displayMode", 551 -values => ['plainText', 'formattedText', 'images'], 552 -default => $displayMode, 553 -labels => { 554 plainText => "plain text", 555 formattedText => "formatted text", 556 images => "images", 557 } 558 ), CGI::br(), 559 $optionLine, 560 CGI::submit(-name=>"redisplay", -label=>"Redisplay Problem"), 561 ); 562 } 563 564 sub previewAnswer($$) { 565 my ($self, $answerResult) = @_; 566 my $ce = $self->{courseEnvironment}; 567 my $effectiveUser = $self->{effectiveUser}; 568 my $set = $self->{set}; 569 my $problem = $self->{problem}; 570 my $displayMode = $self->{displayMode}; 571 572 # note: right now, we have to do things completely differently when we are 573 # rendering math from INSIDE the translator and from OUTSIDE the translator. 574 # so we'll just deal with each case explicitly here. there's some code 575 # duplication that can be dealt with later by abstracting out tth/dvipng/etc. 576 577 my $tex = $answerResult->{preview_latex_string}; 578 579 if ($displayMode eq "plainText") { 580 return $tex; 581 } elsif ($displayMode eq "formattedText") { 582 my $tthCommand = $ce->{externalPrograms}->{tth} 583 . " -L -f5 -r 2> /dev/null <<END_OF_INPUT; echo > /dev/null\n" 584 . "\\($tex\\)\n" 585 . "END_OF_INPUT\n"; 586 587 588 # call tth 589 my $result = `$tthCommand`; 590 if ($?) { 591 return "<b>[tth failed: $? $@]</b>"; 592 } 593 return $result; 594 } elsif ($displayMode eq "images") { 595 # how are we going to name this? 596 my $targetPathCommon = "/png/" 597 . $effectiveUser->id . "." 598 . $set->id . "." 599 . $problem->id . "." 600 . $answerResult->{ans_name} . ".png"; 601 602 # figure out where to put things 603 my $wd = tempdir("webwork-dvipng-XXXXXXXX", DIR => $ce->{courseDirs}->{html_temp}); 604 my $latex = $ce->{externalPrograms}->{latex}; 605 my $dvipng = $ce->{externalPrograms}->{dvipng}; 606 my $targetPath = $ce->{courseDirs}->{html_temp} . $targetPathCommon; 607 # should use surePathToTmpFile, but we have to 608 # isolate it from the problem enivronment first 609 my $targetURL = $ce->{courseURLs}->{html_temp} . $targetPathCommon; 610 611 # call dvipng to generate a preview 612 dvipng($wd, $latex, $dvipng, $tex, $targetPath); 613 if (-e $targetPath) { 614 return "<img src=\"$targetURL\" alt=\"$tex\" />"; 615 } else { 616 return "<b>[math2img failed]</b>"; 617 } 618 } 619 } 620 621 ##### permission queries ##### 622 623 # this stuff should be abstracted out into the permissions system 624 # however, the permission system only knows about things in the 625 # course environment and the username. hmmm... 626 627 # also, i should fix these so that they have a consistent calling 628 # format -- perhaps: 629 # canPERM($courseEnv, $user, $set, $problem, $permissionLevel) 630 631 sub canShowCorrectAnswers($$) { 632 my ($permissionLevel, $answerDate) = @_; 633 return $permissionLevel > 0 || time > $answerDate; 634 } 635 636 sub canShowSolutions($$) { 637 my ($permissionLevel, $answerDate) = @_; 638 return canShowCorrectAnswers($permissionLevel, $answerDate); 639 } 640 641 sub canRecordAnswers($$$$$) { 642 my ($permissionLevel, $openDate, $dueDate, $maxAttempts, $attempts) = @_; 643 my $permHigh = $permissionLevel > 0; 644 my $timeOK = time >= $openDate && time <= $dueDate; 645 my $attemptsOK = $maxAttempts == -1 || $attempts <= $maxAttempts; 646 my $recordAnswers = $permHigh || ($timeOK && $attemptsOK); 647 return $recordAnswers; 648 } 649 650 sub mustRecordAnswers($) { 651 my ($permissionLevel) = @_; 652 return $permissionLevel == 0; 653 } 654 655 1;
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