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check that a tex output actually exists before typesetting the correct answer. This effort is still a hack. Problem.pm needs to be written from the ground up.
1 ################################################################################ 2 # WeBWorK Online Homework Delivery System 3 # Copyright © 2000-2007 The WeBWorK Project, http://openwebwork.sf.net/ 4 # $CVSHeader: webwork2/lib/WeBWorK/ContentGenerator/Problem.pm,v 1.225 2010/05/28 21:29:48 gage Exp $ 5 # 6 # This program is free software; you can redistribute it and/or modify it under 7 # the terms of either: (a) the GNU General Public License as published by the 8 # Free Software Foundation; either version 2, or (at your option) any later 9 # version, or (b) the "Artistic License" which comes with this package. 10 # 11 # This program is distributed in the hope that it will be useful, but WITHOUT 12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 13 # FOR A PARTICULAR PURPOSE. See either the GNU General Public License or the 14 # Artistic License for more details. 15 ################################################################################ 16 17 package WeBWorK::ContentGenerator::Problem; 18 use base qw(WeBWorK::ContentGenerator); 19 20 =head1 NAME 21 22 WeBWorK::ContentGenerator::Problem - Allow a student to interact with a problem. 23 24 =cut 25 26 use strict; 27 use warnings; 28 #use CGI qw(-nosticky ); 29 use WeBWorK::CGI; 30 use File::Path qw(rmtree); 31 use WeBWorK::Debug; 32 use WeBWorK::Form; 33 use WeBWorK::PG; 34 use WeBWorK::PG::ImageGenerator; 35 use WeBWorK::PG::IO; 36 use WeBWorK::Utils qw(readFile writeLog writeCourseLog encodeAnswers decodeAnswers 37 ref2string makeTempDirectory path_is_subdir sortByName before after between); 38 use WeBWorK::DB::Utils qw(global2user user2global); 39 use URI::Escape; 40 41 use WeBWorK::Utils::Tasks qw(fake_set fake_problem); 42 43 ################################################################################ 44 # CGI param interface to this module (up-to-date as of v1.153) 45 ################################################################################ 46 47 # Standard params: 48 # 49 # user - user ID of real user 50 # key - session key 51 # effectiveUser - user ID of effective user 52 # 53 # Integration with PGProblemEditor: 54 # 55 # editMode - if set, indicates alternate problem source location. 56 # can be "temporaryFile" or "savedFile". 57 # 58 # sourceFilePath - path to file to be edited 59 # problemSeed - force problem seed to value 60 # success - success message to display 61 # failure - failure message to display 62 # 63 # Rendering options: 64 # 65 # displayMode - name of display mode to use 66 # 67 # showOldAnswers - request that last entered answer be shown (if allowed) 68 # showCorrectAnswers - request that correct answers be shown (if allowed) 69 # showHints - request that hints be shown (if allowed) 70 # showSolutions - request that solutions be shown (if allowed) 71 # 72 # Problem interaction: 73 # 74 # AnSwEr# - answer blanks in problem 75 # 76 # redisplay - name of the "Redisplay Problem" button 77 # submitAnswers - name of "Submit Answers" button 78 # checkAnswers - name of the "Check Answers" button 79 # previewAnswers - name of the "Preview Answers" button 80 81 ################################################################################ 82 # "can" methods 83 ################################################################################ 84 85 # Subroutines to determine if a user "can" perform an action. Each subroutine is 86 # called with the following arguments: 87 # 88 # ($self, $User, $EffectiveUser, $Set, $Problem) 89 90 # Note that significant parts of the "can" methods are lifted into the 91 # GatewayQuiz module. It isn't direct, however, because of the necessity 92 # of dealing with versioning there. 93 94 sub can_showOldAnswers { 95 #my ($self, $User, $EffectiveUser, $Set, $Problem) = @_; 96 97 return 1; 98 } 99 100 sub can_showCorrectAnswers { 101 my ($self, $User, $EffectiveUser, $Set, $Problem) = @_; 102 my $authz = $self->r->authz; 103 104 return 105 after($Set->answer_date) 106 || 107 $authz->hasPermissions($User->user_id, "show_correct_answers_before_answer_date") 108 ; 109 } 110 111 sub can_showHints { 112 #my ($self, $User, $EffectiveUser, $Set, $Problem) = @_; 113 114 return 1; 115 } 116 117 sub can_showSolutions { 118 my ($self, $User, $EffectiveUser, $Set, $Problem) = @_; 119 my $authz = $self->r->authz; 120 121 return 122 after($Set->answer_date) 123 || 124 $authz->hasPermissions($User->user_id, "show_solutions_before_answer_date") 125 ; 126 } 127 128 sub can_recordAnswers { 129 my ($self, $User, $EffectiveUser, $Set, $Problem, $submitAnswers) = @_; 130 my $authz = $self->r->authz; 131 my $thisAttempt = $submitAnswers ? 1 : 0; 132 if ($User->user_id ne $EffectiveUser->user_id) { 133 return $authz->hasPermissions($User->user_id, "record_answers_when_acting_as_student"); 134 } 135 if (before($Set->open_date)) { 136 return $authz->hasPermissions($User->user_id, "record_answers_before_open_date"); 137 } elsif (between($Set->open_date, $Set->due_date)) { 138 my $max_attempts = $Problem->max_attempts; 139 my $attempts_used = $Problem->num_correct + $Problem->num_incorrect + $thisAttempt; 140 if ($max_attempts == -1 or $attempts_used < $max_attempts) { 141 return $authz->hasPermissions($User->user_id, "record_answers_after_open_date_with_attempts"); 142 } else { 143 return $authz->hasPermissions($User->user_id, "record_answers_after_open_date_without_attempts"); 144 } 145 } elsif (between($Set->due_date, $Set->answer_date)) { 146 return $authz->hasPermissions($User->user_id, "record_answers_after_due_date"); 147 } elsif (after($Set->answer_date)) { 148 return $authz->hasPermissions($User->user_id, "record_answers_after_answer_date"); 149 } 150 } 151 152 sub can_checkAnswers { 153 my ($self, $User, $EffectiveUser, $Set, $Problem, $submitAnswers) = @_; 154 my $authz = $self->r->authz; 155 my $thisAttempt = $submitAnswers ? 1 : 0; 156 157 if (before($Set->open_date)) { 158 return $authz->hasPermissions($User->user_id, "check_answers_before_open_date"); 159 } elsif (between($Set->open_date, $Set->due_date)) { 160 my $max_attempts = $Problem->max_attempts; 161 my $attempts_used = $Problem->num_correct + $Problem->num_incorrect + $thisAttempt; 162 if ($max_attempts == -1 or $attempts_used < $max_attempts) { 163 return $authz->hasPermissions($User->user_id, "check_answers_after_open_date_with_attempts"); 164 } else { 165 return $authz->hasPermissions($User->user_id, "check_answers_after_open_date_without_attempts"); 166 } 167 } elsif (between($Set->due_date, $Set->answer_date)) { 168 return $authz->hasPermissions($User->user_id, "check_answers_after_due_date"); 169 } elsif (after($Set->answer_date)) { 170 return $authz->hasPermissions($User->user_id, "check_answers_after_answer_date"); 171 } 172 } 173 174 # Reset the default in some cases 175 sub set_showOldAnswers_default { 176 my ($self, $ce, $userName, $authz, $set) = @_; 177 # these people always use the system/course default, so don't 178 # override the value of ...->{showOldAnswers} 179 return if $authz->hasPermissions($userName, "can_always_use_show_old_answers_default"); 180 # this person should always default to 0 181 $ce->{pg}->{options}->{showOldAnswers} = 0 182 unless ($authz->hasPermissions($userName, "can_show_old_answers_by_default")); 183 # we are after the due date, so default to not showing it 184 $ce->{pg}->{options}->{showOldAnswers} = 0 if $set->{due_date} && after($set->{due_date}); 185 } 186 187 ################################################################################ 188 # output utilities 189 ################################################################################ 190 191 # Note: the substance of attemptResults is lifted into GatewayQuiz.pm, 192 # with some changes to the output format 193 194 sub attemptResults { 195 my $self = shift; 196 my $pg = shift; 197 my $showAttemptAnswers = shift; 198 my $showCorrectAnswers = shift; 199 my $showAttemptResults = $showAttemptAnswers && shift; 200 my $showSummary = shift; 201 my $showAttemptPreview = shift || 0; 202 203 my $ce = $self->r->ce; 204 205 my $problemResult = $pg->{result}; # the overall result of the problem 206 my @answerNames = @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }; 207 208 my $showMessages = $showAttemptAnswers && grep { $pg->{answers}->{$_}->{ans_message} } @answerNames; 209 210 my $basename = "equation-" . $self->{set}->psvn. "." . $self->{problem}->problem_id . "-preview"; 211 212 # to make grabbing these options easier, we'll pull them out now... 213 my %imagesModeOptions = %{$ce->{pg}->{displayModeOptions}->{images}}; 214 215 my $imgGen = WeBWorK::PG::ImageGenerator->new( 216 tempDir => $ce->{webworkDirs}->{tmp}, 217 latex => $ce->{externalPrograms}->{latex}, 218 dvipng => $ce->{externalPrograms}->{dvipng}, 219 useCache => 1, 220 cacheDir => $ce->{webworkDirs}->{equationCache}, 221 cacheURL => $ce->{webworkURLs}->{equationCache}, 222 cacheDB => $ce->{webworkFiles}->{equationCacheDB}, 223 dvipng_align => $imagesModeOptions{dvipng_align}, 224 dvipng_depth_db => $imagesModeOptions{dvipng_depth_db}, 225 ); 226 227 my $header; 228 #$header .= CGI::th("Part"); 229 $header .= $showAttemptAnswers ? CGI::th("Entered") : ""; 230 $header .= $showAttemptPreview ? CGI::th("Answer Preview") : ""; 231 $header .= $showCorrectAnswers ? CGI::th("Correct") : ""; 232 $header .= $showAttemptResults ? CGI::th("Result") : ""; 233 $header .= $showMessages ? CGI::th("Messages") : ""; 234 my $fully = ''; 235 my @tableRows = ( $header ); 236 my $numCorrect = 0; 237 my $numBlanks =0; 238 my $tthPreambleCache; 239 foreach my $name (@answerNames) { 240 my $answerResult = $pg->{answers}->{$name}; 241 my $studentAnswer = $answerResult->{student_ans}; # original_student_ans 242 my $preview = ($showAttemptPreview 243 ? $self->previewAnswer($answerResult, $imgGen, \$tthPreambleCache) 244 : ""); 245 my $correctAnswerPreview = $self->previewCorrectAnswer($answerResult, $imgGen, \$tthPreambleCache); 246 my $correctAnswer = $answerResult->{correct_ans}; 247 my $answerScore = $answerResult->{score}; 248 my $answerMessage = $showMessages ? $answerResult->{ans_message} : ""; 249 $answerMessage =~ s/\n/<BR>/g; 250 $numCorrect += $answerScore >= 1; 251 $numBlanks++ unless $studentAnswer =~/\S/ || $answerScore >= 1; # unless student answer contains entry 252 my $resultString = $answerScore >= 1 ? "correct" : 253 $answerScore > 0 ? int($answerScore*100)."% correct" : 254 "incorrect"; 255 $fully = 'completely ' if $answerScore >0 and $answerScore < 1; 256 257 # get rid of the goofy prefix on the answer names (supposedly, the format 258 # of the answer names is changeable. this only fixes it for "AnSwEr" 259 #$name =~ s/^AnSwEr//; 260 261 my $row; 262 #$row .= CGI::td($name); 263 $row .= $showAttemptAnswers ? CGI::td($self->nbsp($studentAnswer)) : ""; 264 $row .= $showAttemptPreview ? CGI::td({title=>"$studentAnswer"}, $self->nbsp($preview)) : ""; 265 $row .= $showCorrectAnswers ? CGI::td({title=> "$correctAnswerPreview"}, $self->nbsp($correctAnswer)) : ""; 266 $row .= $showAttemptResults ? CGI::td($self->nbsp($resultString)) : ""; 267 $row .= $showMessages ? CGI::td({-class=>"Message"},$self->nbsp($answerMessage)) : ""; 268 push @tableRows, $row; 269 } 270 271 # render equation images 272 $imgGen->render(refresh => 1); 273 274 # my $numIncorrectNoun = scalar @answerNames == 1 ? "question" : "questions"; 275 my $scorePercent = sprintf("%.0f%%", $problemResult->{score} * 100); 276 # FIXME -- I left the old code in in case we have to back out. 277 # my $summary = "On this attempt, you answered $numCorrect out of " 278 # . scalar @answerNames . " $numIncorrectNoun correct, for a score of $scorePercent."; 279 my $summary = ""; 280 unless (defined($problemResult->{summary}) and $problemResult->{summary} =~ /\S/) { 281 if (scalar @answerNames == 1) { #default messages 282 if ($numCorrect == scalar @answerNames) { 283 $summary .= CGI::div({class=>"ResultsWithoutError"},"The answer above is correct."); 284 } else { 285 $summary .= CGI::div({class=>"ResultsWithError"},"The answer above is NOT ${fully}correct."); 286 } 287 } else { 288 if ($numCorrect == scalar @answerNames) { 289 $summary .= CGI::div({class=>"ResultsWithoutError"},"All of the answers above are correct."); 290 } 291 unless ($numCorrect + $numBlanks == scalar( @answerNames)) { 292 $summary .= CGI::div({class=>"ResultsWithError"},"At least one of the answers above is NOT ${fully}correct."); 293 } 294 if ($numBlanks) { 295 my $s = ($numBlanks>1)?'':'s'; 296 $summary .= CGI::div({class=>"ResultsAlert"},"$numBlanks of the questions remain$s unanswered."); 297 } 298 } 299 } else { 300 $summary = $problemResult->{summary}; # summary has been defined by grader 301 } 302 return 303 CGI::table({-class=>"attemptResults"}, CGI::Tr(\@tableRows)) 304 . ($showSummary ? CGI::p({class=>'attemptResultsSummary'},$summary) : ""); 305 } 306 307 308 # Note: previewAnswer is lifted into GatewayQuiz.pm 309 310 sub previewAnswer { 311 my ($self, $answerResult, $imgGen, $tthPreambleCache) = @_; 312 my $ce = $self->r->ce; 313 my $effectiveUser = $self->{effectiveUser}; 314 my $set = $self->{set}; 315 my $problem = $self->{problem}; 316 my $displayMode = $self->{displayMode}; 317 318 # note: right now, we have to do things completely differently when we are 319 # rendering math from INSIDE the translator and from OUTSIDE the translator. 320 # so we'll just deal with each case explicitly here. there's some code 321 # duplication that can be dealt with later by abstracting out tth/dvipng/etc. 322 323 my $tex = $answerResult->{preview_latex_string}; 324 325 return "" unless defined $tex and $tex ne ""; 326 327 if ($displayMode eq "plainText") { 328 return $tex; 329 } elsif ($displayMode eq "formattedText") { 330 331 # read the TTH preamble, or use the cached copy passed in from the caller 332 my $tthPreamble=''; 333 if (defined $$tthPreambleCache) { 334 $tthPreamble = $$tthPreambleCache; 335 } else { 336 my $tthPreambleFile = $ce->{courseDirs}->{templates} . "/tthPreamble.tex"; 337 if (-r $tthPreambleFile) { 338 $tthPreamble = readFile($tthPreambleFile); 339 # thanks to Jim Martino. each line in the definition file should end with 340 #a % to prevent adding supurious paragraphs to output: 341 $tthPreamble =~ s/(.)\n/$1%\n/g; 342 # solves the problem if the file doesn't end with a return: 343 $tthPreamble .="%\n"; 344 # store preamble in cache: 345 $$tthPreambleCache = $tthPreamble; 346 } else { 347 } 348 } 349 350 # construct TTH command line 351 my $tthCommand = $ce->{externalPrograms}->{tth} 352 . " -L -f5 -u -r 2> /dev/null <<END_OF_INPUT; echo > /dev/null\n" 353 . $tthPreamble . "\\[" . $tex . "\\]\n" 354 . "END_OF_INPUT\n"; 355 356 # call tth 357 my $result = `$tthCommand`; 358 if ($?) { 359 return "<b>[tth failed: $? $@]</b>"; 360 } else { 361 # avoid border problems in tables and remove unneeded initial <br> 362 $result =~ s/(<table [^>]*)>/$1 CLASS="ArrayLayout">/gi; 363 $result =~ s!\s*<br clear="all" />!!; 364 return $result; 365 } 366 367 } elsif ($displayMode eq "images") { 368 $imgGen->add($tex); 369 } elsif ($displayMode eq "jsMath") { 370 $tex =~ s/</</g; $tex =~ s/>/>/g; 371 return '<SPAN CLASS="math">\\displaystyle{'.$tex.'}</SPAN>'; 372 } 373 } 374 sub previewCorrectAnswer { 375 my ($self, $answerResult, $imgGen, $tthPreambleCache) = @_; 376 my $ce = $self->r->ce; 377 my $effectiveUser = $self->{effectiveUser}; 378 my $set = $self->{set}; 379 my $problem = $self->{problem}; 380 my $displayMode = $self->{displayMode}; 381 382 # note: right now, we have to do things completely differently when we are 383 # rendering math from INSIDE the translator and from OUTSIDE the translator. 384 # so we'll just deal with each case explicitly here. there's some code 385 # duplication that can be dealt with later by abstracting out tth/dvipng/etc. 386 387 return "" unless defined( $answerResult->{correct_value} ) and ref( $answerResult->{correct_value} ); 388 389 my $tex = $answerResult->{correct_value}->TeX; 390 391 return "" unless defined $tex and $tex ne ""; 392 393 if ($displayMode eq "plainText") { 394 return $tex; 395 } elsif ($displayMode eq "formattedText") { 396 397 # read the TTH preamble, or use the cached copy passed in from the caller 398 my $tthPreamble=''; 399 if (defined $$tthPreambleCache) { 400 $tthPreamble = $$tthPreambleCache; 401 } else { 402 my $tthPreambleFile = $ce->{courseDirs}->{templates} . "/tthPreamble.tex"; 403 if (-r $tthPreambleFile) { 404 $tthPreamble = readFile($tthPreambleFile); 405 # thanks to Jim Martino. each line in the definition file should end with 406 #a % to prevent adding supurious paragraphs to output: 407 $tthPreamble =~ s/(.)\n/$1%\n/g; 408 # solves the problem if the file doesn't end with a return: 409 $tthPreamble .="%\n"; 410 # store preamble in cache: 411 $$tthPreambleCache = $tthPreamble; 412 } else { 413 } 414 } 415 416 # construct TTH command line 417 my $tthCommand = $ce->{externalPrograms}->{tth} 418 . " -L -f5 -u -r 2> /dev/null <<END_OF_INPUT; echo > /dev/null\n" 419 . $tthPreamble . "\\[" . $tex . "\\]\n" 420 . "END_OF_INPUT\n"; 421 422 # call tth 423 my $result = `$tthCommand`; 424 if ($?) { 425 return "<b>[tth failed: $? $@]</b>"; 426 } else { 427 # avoid border problems in tables and remove unneeded initial <br> 428 $result =~ s/(<table [^>]*)>/$1 CLASS="ArrayLayout">/gi; 429 $result =~ s!\s*<br clear="all" />!!; 430 return $result; 431 } 432 433 } elsif ($displayMode eq "images") { 434 $imgGen->add($tex); 435 } elsif ($displayMode eq "jsMath") { 436 $tex =~ s/</</g; $tex =~ s/>/>/g; 437 return '<SPAN CLASS="math">\\displaystyle{'.$tex.'}</SPAN>'; 438 } 439 } 440 441 ################################################################################ 442 # Template escape implementations 443 ################################################################################ 444 445 sub pre_header_initialize { 446 my ($self) = @_; 447 my $r = $self->r; 448 my $ce = $r->ce; 449 my $db = $r->db; 450 my $authz = $r->authz; 451 my $urlpath = $r->urlpath; 452 453 my $setName = $urlpath->arg("setID"); 454 my $problemNumber = $r->urlpath->arg("problemID"); 455 my $userName = $r->param('user'); 456 my $effectiveUserName = $r->param('effectiveUser'); 457 my $key = $r->param('key'); 458 my $editMode = $r->param("editMode"); 459 460 my $user = $db->getUser($userName); # checked 461 die "record for user $userName (real user) does not exist." 462 unless defined $user; 463 464 my $effectiveUser = $db->getUser($effectiveUserName); # checked 465 die "record for user $effectiveUserName (effective user) does not exist." 466 unless defined $effectiveUser; 467 468 # obtain the merged set for $effectiveUser 469 my $set = $db->getMergedSet($effectiveUserName, $setName); # checked 470 471 $self->set_showOldAnswers_default($ce, $userName, $authz, $set); 472 473 # Database fix (in case of undefined published values) 474 # this is only necessary because some people keep holding to ww1.9 which did not have a published field 475 # make sure published is set to 0 or 1 476 if ( $set and $set->published ne "0" and $set->published ne "1") { 477 my $globalSet = $db->getGlobalSet($set->set_id); 478 $globalSet->published("1"); # defaults to published 479 $db->putGlobalSet($globalSet); 480 $set = $db->getMergedSet($effectiveUserName, $setName); 481 } else { 482 # don't do anything just yet, maybe we're a professor and we're 483 # fabricating a set or haven't assigned it to ourselves just yet 484 } 485 # When a set is created enable_reduced_scoring is null, so we have to set it 486 if ( $set and $set->enable_reduced_scoring ne "0" and $set->enable_reduced_scoring ne "1") { 487 my $globalSet = $db->getGlobalSet($set->set_id); 488 $globalSet->enable_reduced_scoring("0"); # defaults to disabled 489 $db->putGlobalSet($globalSet); 490 $set = $db->getMergedSet($effectiveUserName, $setName); 491 } 492 493 494 # obtain the merged problem for $effectiveUser 495 my $problem = $db->getMergedProblem($effectiveUserName, $setName, $problemNumber); # checked 496 497 if ($authz->hasPermissions($userName, "modify_problem_sets")) { 498 # professors are allowed to fabricate sets and problems not 499 # assigned to them (or anyone). this allows them to use the 500 # editor to 501 502 # if a User Set does not exist for this user and this set 503 # then we check the Global Set 504 # if that does not exist we create a fake set 505 # if it does, we add fake user data 506 unless (defined $set) { 507 my $userSetClass = $db->{set_user}->{record}; 508 my $globalSet = $db->getGlobalSet($setName); # checked 509 510 if (not defined $globalSet) { 511 $set = fake_set($db); 512 } else { 513 $set = global2user($userSetClass, $globalSet); 514 $set->psvn(0); 515 } 516 } 517 518 # if that is not yet defined obtain the global problem, 519 # convert it to a user problem, and add fake user data 520 unless (defined $problem) { 521 my $userProblemClass = $db->{problem_user}->{record}; 522 my $globalProblem = $db->getGlobalProblem($setName, $problemNumber); # checked 523 # if the global problem doesn't exist either, bail! 524 if(not defined $globalProblem) { 525 my $sourceFilePath = $r->param("sourceFilePath"); 526 die "sourceFilePath is unsafe!" unless path_is_subdir($sourceFilePath, $ce->{courseDirs}->{templates}, 1); # 1==path can be relative to dir 527 # These are problems from setmaker. If declared invalid, they won't come up 528 $self->{invalidProblem} = $self->{invalidSet} = 1 unless defined $sourceFilePath; 529 # die "Problem $problemNumber in set $setName does not exist" unless defined $sourceFilePath; 530 $problem = fake_problem($db); 531 $problem->problem_id(1); 532 $problem->source_file($sourceFilePath); 533 $problem->user_id($effectiveUserName); 534 } else { 535 $problem = global2user($userProblemClass, $globalProblem); 536 $problem->user_id($effectiveUserName); 537 $problem->problem_seed(0); 538 $problem->status(0); 539 $problem->attempted(0); 540 $problem->last_answer(""); 541 $problem->num_correct(0); 542 $problem->num_incorrect(0); 543 } 544 } 545 546 # now we're sure we have valid UserSet and UserProblem objects 547 # yay! 548 549 # now deal with possible editor overrides: 550 551 # if the caller is asking to override the source file, and 552 # editMode calls for a temporary file, do so 553 my $sourceFilePath = $r->param("sourceFilePath"); 554 if (defined $editMode and $editMode eq "temporaryFile" and defined $sourceFilePath) { 555 die "sourceFilePath is unsafe!" unless path_is_subdir($sourceFilePath, $ce->{courseDirs}->{templates}, 1); # 1==path can be relative to dir 556 $problem->source_file($sourceFilePath); 557 } 558 559 # if the problem does not have a source file or no source file has been passed in 560 # then this is really an invalid problem (probably from a bad URL) 561 $self->{invalidProblem} = not (defined $sourceFilePath or $problem->source_file); 562 563 # if the caller is asking to override the problem seed, do so 564 my $problemSeed = $r->param("problemSeed"); 565 if (defined $problemSeed) { 566 $problem->problem_seed($problemSeed); 567 } 568 569 my $publishedClass = ($set->published) ? "Published" : "Unpublished"; 570 my $publishedText = ($set->published) ? "visible to students." : "hidden from students."; 571 $self->addmessage(CGI::span("This set is " . CGI::font({class=>$publishedClass}, $publishedText))); 572 573 # test for additional problem validity if it's not already invalid 574 } else { 575 $self->{invalidProblem} = !(defined $problem and ($set->published || $authz->hasPermissions($userName, "view_unpublished_sets"))); 576 577 $self->addbadmessage(CGI::p("This problem will not count towards your grade.")) if $problem and not $problem->value and not $self->{invalidProblem}; 578 } 579 580 $self->{userName} = $userName; 581 $self->{effectiveUserName} = $effectiveUserName; 582 $self->{user} = $user; 583 $self->{effectiveUser} = $effectiveUser; 584 $self->{set} = $set; 585 $self->{problem} = $problem; 586 $self->{editMode} = $editMode; 587 588 ##### form processing ##### 589 590 # set options from form fields (see comment at top of file for names) 591 my $displayMode = $r->param("displayMode") || $ce->{pg}->{options}->{displayMode}; 592 my $redisplay = $r->param("redisplay"); 593 my $submitAnswers = $r->param("submitAnswers"); 594 my $checkAnswers = $r->param("checkAnswers"); 595 my $previewAnswers = $r->param("previewAnswers"); 596 597 my $formFields = { WeBWorK::Form->new_from_paramable($r)->Vars }; 598 599 $self->{displayMode} = $displayMode; 600 $self->{redisplay} = $redisplay; 601 $self->{submitAnswers} = $submitAnswers; 602 $self->{checkAnswers} = $checkAnswers; 603 $self->{previewAnswers} = $previewAnswers; 604 $self->{formFields} = $formFields; 605 606 # get result and send to message 607 my $status_message = $r->param("status_message"); 608 $self->addmessage(CGI::p("$status_message")) if $status_message; 609 610 # now that we've set all the necessary variables quit out if the set or problem is invalid 611 return if $self->{invalidSet} || $self->{invalidProblem}; 612 613 ##### permissions ##### 614 615 # what does the user want to do? 616 #FIXME There is a problem with checkboxes -- if they are not checked they are invisible. Hence if the default mode in $ce is 1 617 # there is no way to override this. Probably this is ok for the last three options, but it was definitely not ok for showing 618 # saved answers which is normally on, but you want to be able to turn it off! This section should be moved to ContentGenerator 619 # so that you can set these options anywhere. We also need mechanisms for making them sticky. 620 # Note: ProblemSet and ProblemSets might set showOldAnswers to '', which 621 # needs to be treated as if it is not set. 622 my %want = ( 623 showOldAnswers => (defined($r->param("showOldAnswers")) and $r->param("showOldAnswers") ne '') ? $r->param("showOldAnswers") : $ce->{pg}->{options}->{showOldAnswers}, 624 showCorrectAnswers => $r->param("showCorrectAnswers") || $ce->{pg}->{options}->{showCorrectAnswers}, 625 showHints => $r->param("showHints") || $ce->{pg}->{options}->{showHints}, 626 showSolutions => $r->param("showSolutions") || $ce->{pg}->{options}->{showSolutions}, 627 recordAnswers => $submitAnswers, 628 checkAnswers => $checkAnswers, 629 getSubmitButton => 1, 630 ); 631 632 # are certain options enforced? 633 my %must = ( 634 showOldAnswers => 0, 635 showCorrectAnswers => 0, 636 showHints => 0, 637 showSolutions => 0, 638 recordAnswers => ! $authz->hasPermissions($userName, "avoid_recording_answers"), 639 checkAnswers => 0, 640 getSubmitButton => 0, 641 ); 642 643 # does the user have permission to use certain options? 644 my @args = ($user, $effectiveUser, $set, $problem); 645 my %can = ( 646 showOldAnswers => $self->can_showOldAnswers(@args), 647 showCorrectAnswers => $self->can_showCorrectAnswers(@args), 648 showHints => $self->can_showHints(@args), 649 showSolutions => $self->can_showSolutions(@args), 650 recordAnswers => $self->can_recordAnswers(@args, 0), 651 checkAnswers => $self->can_checkAnswers(@args, $submitAnswers), 652 getSubmitButton => $self->can_recordAnswers(@args, $submitAnswers), 653 ); 654 655 # final values for options 656 my %will; 657 foreach (keys %must) { 658 $will{$_} = $can{$_} && ($want{$_} || $must{$_}); 659 #warn "final values for options $_ is can $can{$_}, want $want{$_}, must $must{$_}, will $will{$_}"; 660 } 661 662 ##### sticky answers ##### 663 664 if (not ($submitAnswers or $previewAnswers or $checkAnswers) and $will{showOldAnswers}) { 665 # do this only if new answers are NOT being submitted 666 my %oldAnswers = decodeAnswers($problem->last_answer); 667 $formFields->{$_} = $oldAnswers{$_} foreach keys %oldAnswers; 668 } 669 670 ##### translation ##### 671 672 debug("begin pg processing"); 673 my $pg = WeBWorK::PG->new( 674 $ce, 675 $effectiveUser, 676 $key, 677 $set, 678 $problem, 679 $set->psvn, # FIXME: this field should be removed 680 $formFields, 681 { # translation options 682 displayMode => $displayMode, 683 showHints => $will{showHints}, 684 showSolutions => $will{showSolutions}, 685 refreshMath2img => $will{showHints} || $will{showSolutions}, 686 processAnswers => 1, 687 permissionLevel => $db->getPermissionLevel($userName)->permission, 688 effectivePermissionLevel => $db->getPermissionLevel($effectiveUserName)->permission, 689 }, 690 ); 691 692 debug("end pg processing"); 693 694 ##### fix hint/solution options ##### 695 696 $can{showHints} &&= $pg->{flags}->{hintExists} 697 &&= $pg->{flags}->{showHintLimit}<=$pg->{state}->{num_of_incorrect_ans}; 698 $can{showSolutions} &&= $pg->{flags}->{solutionExists}; 699 700 ##### store fields ##### 701 702 $self->{want} = \%want; 703 $self->{must} = \%must; 704 $self->{can} = \%can; 705 $self->{will} = \%will; 706 $self->{pg} = $pg; 707 } 708 709 sub if_errors($$) { 710 my ($self, $arg) = @_; 711 712 if ($self->{isOpen}) { 713 return $self->{pg}->{flags}->{error_flag} ? $arg : !$arg; 714 } else { 715 return !$arg; 716 } 717 } 718 719 sub head { 720 my ($self) = @_; 721 722 return "" if ( $self->{invalidSet} ); 723 return $self->{pg}->{head_text} if $self->{pg}->{head_text}; 724 } 725 726 sub options { 727 my ($self) = @_; 728 #warn "doing options in Problem"; 729 730 # don't show options if we don't have anything to show 731 return "" if $self->{invalidSet} or $self->{invalidProblem}; 732 733 my $displayMode = $self->{displayMode}; 734 my %can = %{ $self->{can} }; 735 736 my @options_to_show = "displayMode"; 737 push @options_to_show, "showOldAnswers" if $can{showOldAnswers}; 738 push @options_to_show, "showHints" if $can{showHints}; 739 push @options_to_show, "showSolutions" if $can{showSolutions}; 740 741 return $self->optionsMacro( 742 options_to_show => \@options_to_show, 743 extra_params => ["editMode", "sourceFilePath"], 744 ); 745 } 746 747 sub siblings { 748 my ($self) = @_; 749 my $r = $self->r; 750 my $db = $r->db; 751 my $urlpath = $r->urlpath; 752 753 # can't show sibling problems if the set is invalid 754 return "" if $self->{invalidSet}; 755 756 my $courseID = $urlpath->arg("courseID"); 757 my $setID = $self->{set}->set_id; 758 my $eUserID = $r->param("effectiveUser"); 759 my @problemIDs = sort { $a <=> $b } $db->listUserProblems($eUserID, $setID); 760 761 print CGI::start_div({class=>"info-box", id=>"fisheye"}); 762 print CGI::h2("Problems"); 763 #print CGI::start_ul({class=>"LinksMenu"}); 764 #print CGI::start_li(); 765 #print CGI::span({style=>"font-size:larger"}, "Problems"); 766 print CGI::start_ul(); 767 768 foreach my $problemID (@problemIDs) { 769 my $problemPage = $urlpath->newFromModule("WeBWorK::ContentGenerator::Problem", 770 courseID => $courseID, setID => $setID, problemID => $problemID); 771 print CGI::li(CGI::a( {href=>$self->systemLink($problemPage, 772 params=>{ displayMode => $self->{displayMode}, 773 showOldAnswers => $self->{will}->{showOldAnswers} 774 })}, "Problem $problemID") 775 ); 776 } 777 778 print CGI::end_ul(); 779 #print CGI::end_li(); 780 #print CGI::end_ul(); 781 print CGI::end_div(); 782 783 return ""; 784 } 785 786 sub nav { 787 my ($self, $args) = @_; 788 my $r = $self->r; 789 my $db = $r->db; 790 my $urlpath = $r->urlpath; 791 792 return "" if ( $self->{invalidSet} ); 793 794 my $courseID = $urlpath->arg("courseID"); 795 my $setID = $self->{set}->set_id if !($self->{invalidSet}); 796 my $problemID = $self->{problem}->problem_id if !($self->{invalidProblem}); 797 my $eUserID = $r->param("effectiveUser"); 798 799 my ($prevID, $nextID); 800 801 if (!$self->{invalidProblem}) { 802 my @problemIDs = $db->listUserProblems($eUserID, $setID); 803 foreach my $id (@problemIDs) { 804 $prevID = $id if $id < $problemID 805 and (not defined $prevID or $id > $prevID); 806 $nextID = $id if $id > $problemID 807 and (not defined $nextID or $id < $nextID); 808 } 809 } 810 811 my @links; 812 813 if ($prevID) { 814 my $prevPage = $urlpath->newFromModule(__PACKAGE__, 815 courseID => $courseID, setID => $setID, problemID => $prevID); 816 push @links, "Previous Problem", $r->location . $prevPage->path, "navPrev"; 817 } else { 818 push @links, "Previous Problem", "", "navPrevGrey"; 819 } 820 821 if (defined($setID) && $setID ne 'Undefined_Set') { 822 push @links, "Problem List", $r->location . $urlpath->parent->path, "navProbList"; 823 } else { 824 push @links, "Problem List", "", "navProbListGrey"; 825 } 826 827 if ($nextID) { 828 my $nextPage = $urlpath->newFromModule(__PACKAGE__, 829 courseID => $courseID, setID => $setID, problemID => $nextID); 830 push @links, "Next Problem", $r->location . $nextPage->path, "navNext"; 831 } else { 832 push @links, "Next Problem", "", "navNextGrey"; 833 } 834 835 my $tail = ""; 836 837 $tail .= "&displayMode=".$self->{displayMode} if defined $self->{displayMode}; 838 $tail .= "&showOldAnswers=".$self->{will}->{showOldAnswers} 839 if defined $self->{will}->{showOldAnswers}; 840 return $self->navMacro($args, $tail, @links); 841 } 842 843 sub title { 844 my ($self) = @_; 845 846 # using the url arguments won't break if the set/problem are invalid 847 my $setID = WeBWorK::ContentGenerator::underscore2nbsp($self->r->urlpath->arg("setID")); 848 my $problemID = $self->r->urlpath->arg("problemID"); 849 850 return "$setID: Problem $problemID"; 851 } 852 853 sub body { 854 my $self = shift; 855 my $r = $self->r; 856 my $ce = $r->ce; 857 my $db = $r->db; 858 my $authz = $r->authz; 859 my $urlpath = $r->urlpath; 860 my $user = $r->param('user'); 861 my $effectiveUser = $r->param('effectiveUser'); 862 863 if ( $self->{invalidSet} ) { 864 return CGI::div({class=>"ResultsWithError"}, 865 CGI::p("The selected problem set (" . 866 $urlpath->arg("setID") . ") is not " . 867 "a valid set for $effectiveUser:"), 868 CGI::p($self->{invalidSet})); 869 } 870 871 if ($self->{invalidProblem}) { 872 return CGI::div({class=>"ResultsWithError"}, 873 CGI::p("The selected problem (" . $urlpath->arg("problemID") . ") is not a valid problem for set " . $self->{set}->set_id . ".")); 874 } 875 876 # unpack some useful variables 877 my $set = $self->{set}; 878 my $problem = $self->{problem}; 879 my $editMode = $self->{editMode}; 880 my $submitAnswers = $self->{submitAnswers}; 881 my $checkAnswers = $self->{checkAnswers}; 882 my $previewAnswers = $self->{previewAnswers}; 883 my %want = %{ $self->{want} }; 884 my %can = %{ $self->{can} }; 885 my %must = %{ $self->{must} }; 886 my %will = %{ $self->{will} }; 887 my $pg = $self->{pg}; 888 889 my $courseName = $urlpath->arg("courseID"); 890 891 # FIXME: move editor link to top, next to problem number. 892 # format as "[edit]" like we're doing with course info file, etc. 893 # add edit link for set as well. 894 my $editorLink = ""; 895 # if we are here without a real homework set, carry that through 896 my $forced_field = []; 897 $forced_field = ['sourceFilePath' => $r->param("sourceFilePath")] if 898 ($set->set_id eq 'Undefined_Set'); 899 if ($authz->hasPermissions($user, "modify_problem_sets")) { 900 my $editorPage = $urlpath->newFromModule("WeBWorK::ContentGenerator::Instructor::PGProblemEditor", 901 courseID => $courseName, setID => $set->set_id, problemID => $problem->problem_id); 902 my $editorURL = $self->systemLink($editorPage, params=>$forced_field); 903 $editorLink = CGI::p(CGI::a({href=>$editorURL,target =>'WW_Editor'}, "Edit this problem")); 904 } 905 906 ##### translation errors? ##### 907 908 if ($pg->{flags}->{error_flag}) { 909 if ($authz->hasPermissions($user, "view_problem_debugging_info")) { 910 print $self->errorOutput($pg->{errors}, $pg->{body_text}); 911 } else { 912 print $self->errorOutput($pg->{errors}, "You do not have permission to view the details of this error."); 913 } 914 print $editorLink; 915 return ""; 916 } 917 918 ##### answer processing ##### 919 debug("begin answer processing"); 920 # if answers were submitted: 921 my $scoreRecordedMessage; 922 my $pureProblem; 923 if ($submitAnswers) { 924 # get a "pure" (unmerged) UserProblem to modify 925 # this will be undefined if the problem has not been assigned to this user 926 $pureProblem = $db->getUserProblem($problem->user_id, $problem->set_id, $problem->problem_id); # checked 927 if (defined $pureProblem) { 928 # store answers in DB for sticky answers 929 my %answersToStore; 930 my %answerHash = %{ $pg->{answers} }; 931 $answersToStore{$_} = $self->{formFields}->{$_} #$answerHash{$_}->{original_student_ans} -- this may have been modified for fields with multiple values. Don't use it!! 932 foreach (keys %answerHash); 933 934 # There may be some more answers to store -- one which are auxiliary entries to a primary answer. Evaluating 935 # matrices works in this way, only the first answer triggers an answer evaluator, the rest are just inputs 936 # however we need to store them. Fortunately they are still in the input form. 937 my @extra_answer_names = @{ $pg->{flags}->{KEPT_EXTRA_ANSWERS}}; 938 $answersToStore{$_} = $self->{formFields}->{$_} foreach (@extra_answer_names); 939 940 # Now let's encode these answers to store them -- append the extra answers to the end of answer entry order 941 my @answer_order = (@{$pg->{flags}->{ANSWER_ENTRY_ORDER}}, @extra_answer_names); 942 my $answerString = encodeAnswers(%answersToStore, 943 @answer_order); 944 945 # store last answer to database 946 $problem->last_answer($answerString); 947 $pureProblem->last_answer($answerString); 948 $db->putUserProblem($pureProblem); 949 950 # store state in DB if it makes sense 951 if ($will{recordAnswers}) { 952 $problem->status($pg->{state}->{recorded_score}); 953 $problem->sub_status($pg->{state}->{sub_recorded_score}); 954 $problem->attempted(1); 955 $problem->num_correct($pg->{state}->{num_of_correct_ans}); 956 $problem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 957 $pureProblem->status($pg->{state}->{recorded_score}); 958 $pureProblem->sub_status($pg->{state}->{sub_recorded_score}); 959 $pureProblem->attempted(1); 960 $pureProblem->num_correct($pg->{state}->{num_of_correct_ans}); 961 $pureProblem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 962 if ($db->putUserProblem($pureProblem)) { 963 $scoreRecordedMessage = "Your score was recorded."; 964 } else { 965 $scoreRecordedMessage = "Your score was not recorded because there was a failure in storing the problem record to the database."; 966 } 967 # write to the transaction log, just to make sure 968 writeLog($self->{ce}, "transaction", 969 $problem->problem_id."\t". 970 $problem->set_id."\t". 971 $problem->user_id."\t". 972 $problem->source_file."\t". 973 $problem->value."\t". 974 $problem->max_attempts."\t". 975 $problem->problem_seed."\t". 976 $pureProblem->status."\t". 977 $pureProblem->attempted."\t". 978 $pureProblem->last_answer."\t". 979 $pureProblem->num_correct."\t". 980 $pureProblem->num_incorrect 981 ); 982 } else { 983 if (before($set->open_date) or after($set->due_date)) { 984 $scoreRecordedMessage = "Your score was not recorded because this homework set is closed."; 985 } else { 986 $scoreRecordedMessage = "Your score was not recorded."; 987 } 988 } 989 } else { 990 $scoreRecordedMessage = "Your score was not recorded because this problem has not been assigned to you."; 991 } 992 } 993 994 # logging student answers 995 996 my $answer_log = $self->{ce}->{courseFiles}->{logs}->{'answer_log'}; 997 if ( defined($answer_log ) and defined($pureProblem)) { 998 if ($submitAnswers && !$authz->hasPermissions($effectiveUser, "dont_log_past_answers")) { 999 my $answerString = ""; my $scores = ""; 1000 my %answerHash = %{ $pg->{answers} }; 1001 # FIXME this is the line 552 error. make sure original student ans is defined. 1002 # The fact that it is not defined is probably due to an error in some answer evaluator. 1003 # But I think it is useful to suppress this error message in the log. 1004 foreach (sortByName(undef, keys %answerHash)) { 1005 my $orig_ans = $answerHash{$_}->{original_student_ans}; 1006 my $student_ans = defined $orig_ans ? $orig_ans : ''; 1007 $answerString .= $student_ans."\t"; 1008 $scores .= $answerHash{$_}->{score} >= 1 ? "1" : "0"; 1009 } 1010 $answerString = '' unless defined($answerString); # insure string is defined. 1011 writeCourseLog($self->{ce}, "answer_log", 1012 join("", 1013 '|', $problem->user_id, 1014 '|', $problem->set_id, 1015 '|', $problem->problem_id, 1016 '|', $scores, "\t", 1017 time(),"\t", 1018 $answerString, 1019 ), 1020 ); 1021 1022 } 1023 } 1024 1025 debug("end answer processing"); 1026 1027 ##### output ##### 1028 # custom message for editor 1029 if ($authz->hasPermissions($user, "modify_problem_sets") and defined $editMode) { 1030 if ($editMode eq "temporaryFile") { 1031 print CGI::p(CGI::div({class=>'temporaryFile'}, "Viewing temporary file: ", $problem->source_file)); 1032 } elsif ($editMode eq "savedFile") { 1033 # taken care of in the initialization phase 1034 } 1035 } 1036 print CGI::start_div({class=>"problemHeader"}); 1037 1038 1039 1040 # attempt summary 1041 #FIXME -- the following is a kludge: if showPartialCorrectAnswers is negative don't show anything. 1042 # until after the due date 1043 # do I need to check $will{showCorrectAnswers} to make preflight work?? 1044 if (($pg->{flags}->{showPartialCorrectAnswers} >= 0 and $submitAnswers) ) { 1045 # print this if user submitted answers OR requested correct answers 1046 1047 print $self->attemptResults($pg, 1, 1048 $will{showCorrectAnswers}, 1049 $pg->{flags}->{showPartialCorrectAnswers}, 1, 1); 1050 } elsif ($checkAnswers) { 1051 # print this if user previewed answers 1052 print CGI::div({class=>'ResultsWithError'},"ANSWERS ONLY CHECKED -- ANSWERS NOT RECORDED"), CGI::br(); 1053 print $self->attemptResults($pg, 1, $will{showCorrectAnswers}, 1, 1, 1); 1054 # show attempt answers 1055 # show correct answers if asked 1056 # show attempt results (correctness) 1057 # show attempt previews 1058 } elsif ($previewAnswers) { 1059 # print this if user previewed answers 1060 print CGI::div({class=>'ResultsWithError'},"PREVIEW ONLY -- ANSWERS NOT RECORDED"),CGI::br(),$self->attemptResults($pg, 1, 0, 0, 0, 1); 1061 # show attempt answers 1062 # don't show correct answers 1063 # don't show attempt results (correctness) 1064 # show attempt previews 1065 } 1066 1067 print CGI::end_div(); 1068 1069 # main form 1070 print "\n"; 1071 print CGI::start_form(-method=>"POST", -action=> $r->uri,-name=>"problemMainForm", onsubmit=>"submitAction()"); 1072 print $self->hidden_authen_fields; 1073 print "\n"; 1074 print CGI::start_div({class=>"problem"}); 1075 print CGI::p($pg->{body_text}); 1076 print CGI::p(CGI::b("Note: "). CGI::i($pg->{result}->{msg})) if $pg->{result}->{msg}; 1077 print $editorLink; # this is empty unless it is appropriate to have an editor link. 1078 print CGI::end_div(); 1079 1080 print CGI::start_p(); 1081 1082 if ($can{showCorrectAnswers}) { 1083 print CGI::checkbox( 1084 -name => "showCorrectAnswers", 1085 -checked => $will{showCorrectAnswers}, 1086 -label => "Show correct answers", 1087 -value => 1, 1088 ); 1089 } 1090 if ($can{showHints}) { 1091 print CGI::div({style=>"color:red"}, 1092 CGI::checkbox( 1093 -name => "showHints", 1094 -checked => $will{showHints}, 1095 -label => "Show Hints", 1096 -value =>1, 1097 ) 1098 ); 1099 } 1100 if ($can{showSolutions}) { 1101 print CGI::checkbox( 1102 -name => "showSolutions", 1103 -checked => $will{showSolutions}, 1104 -label => "Show Solutions", 1105 -value => 1, 1106 ); 1107 } 1108 1109 if ($can{showCorrectAnswers} or $can{showHints} or $can{showSolutions}) { 1110 print CGI::br(); 1111 } 1112 1113 print CGI::submit(-name=>"previewAnswers", -label=>"Preview Answers"); 1114 if ($can{checkAnswers}) { 1115 print CGI::submit(-name=>"checkAnswers", -label=>"Check Answers"); 1116 } 1117 if ($can{getSubmitButton}) { 1118 if ($user ne $effectiveUser) { 1119 # if acting as a student, make it clear that answer submissions will 1120 # apply to the student's records, not the professor's. 1121 print CGI::submit(-name=>"submitAnswers", -label=>"Submit Answers for $effectiveUser"); 1122 } else { 1123 #print CGI::submit(-name=>"submitAnswers", -label=>"Submit Answers", -onclick=>"alert('submit button clicked')"); 1124 print CGI::submit(-name=>"submitAnswers", -label=>"Submit Answers", -onclick=>""); 1125 # FIXME for unknown reasons the -onclick label seems to have to be there in order to allow the forms onsubmit to trigger 1126 # WFT??? 1127 } 1128 } 1129 1130 print CGI::end_p(); 1131 1132 print CGI::start_div({class=>"scoreSummary"}); 1133 1134 # score summary 1135 my $attempts = $problem->num_correct + $problem->num_incorrect; 1136 my $attemptsNoun = $attempts != 1 ? "times" : "time"; 1137 my $problem_status = $problem->status || 0; 1138 my $lastScore = sprintf("%.0f%%", $problem_status * 100); # Round to whole number 1139 my ($attemptsLeft, $attemptsLeftNoun); 1140 if ($problem->max_attempts == -1) { 1141 # unlimited attempts 1142 $attemptsLeft = "unlimited"; 1143 $attemptsLeftNoun = "attempts"; 1144 } else { 1145 $attemptsLeft = $problem->max_attempts - $attempts; 1146 $attemptsLeftNoun = $attemptsLeft == 1 ? "attempt" : "attempts"; 1147 } 1148 1149 my $setClosed = 0; 1150 my $setClosedMessage; 1151 if (before($set->open_date) or after($set->due_date)) { 1152 $setClosed = 1; 1153 if (before($set->open_date)) { 1154 $setClosedMessage = "This homework set is not yet open."; 1155 } elsif (after($set->due_date)) { 1156 $setClosedMessage = "This homework set is closed."; 1157 } 1158 } 1159 #if (before($set->open_date) or after($set->due_date)) { 1160 # $setClosed = 1; 1161 # $setClosedMessage = "This homework set is closed."; 1162 # if ($authz->hasPermissions($user, "view_answers")) { 1163 # $setClosedMessage .= " However, since you are a privileged user, additional attempts will be recorded."; 1164 # } else { 1165 # $setClosedMessage .= " Additional attempts will not be recorded."; 1166 # } 1167 #} 1168 unless (defined( $pg->{state}->{state_summary_msg}) and $pg->{state}->{state_summary_msg}=~/\S/) { 1169 my $notCountedMessage = ($problem->value) ? "" : "(This problem will not count towards your grade.)"; 1170 print CGI::p(join("", 1171 $submitAnswers ? $scoreRecordedMessage . CGI::br() : "", 1172 "You have attempted this problem $attempts $attemptsNoun.", CGI::br(), 1173 $submitAnswers ?"You received a score of ".sprintf("%.0f%%", $pg->{result}->{score} * 100)." for this attempt.".CGI::br():'', 1174 $problem->attempted 1175 ? "Your overall recorded score is $lastScore. $notCountedMessage" . CGI::br() 1176 : "", 1177 $setClosed ? $setClosedMessage : "You have $attemptsLeft $attemptsLeftNoun remaining." 1178 )); 1179 }else { 1180 print CGI::p($pg->{state}->{state_summary_msg}); 1181 } 1182 print CGI::end_div(); 1183 1184 # save state for viewOptions 1185 print CGI::hidden( 1186 -name => "showOldAnswers", 1187 -value => $will{showOldAnswers} 1188 ), 1189 1190 CGI::hidden( 1191 -name => "displayMode", 1192 -value => $self->{displayMode} 1193 ); 1194 print( CGI::hidden( 1195 -name => 'editMode', 1196 -value => $self->{editMode}, 1197 ) 1198 ) if defined($self->{editMode}) and $self->{editMode} eq 'temporaryFile'; 1199 1200 # this is a security risk -- students can use this to find the source code for the problem 1201 1202 my $permissionLevel = $db->getPermissionLevel($user)->permission; 1203 my $professorPermissionLevel = $ce->{userRoles}->{professor}; 1204 print( CGI::hidden( 1205 -name => 'sourceFilePath', 1206 -value => $self->{problem}->{source_file} 1207 )) if defined($self->{problem}->{source_file}) and $permissionLevel>= $professorPermissionLevel; # only allow this for professors 1208 1209 print( CGI::hidden( 1210 -name => 'problemSeed', 1211 -value => $r->param("problemSeed") 1212 )) if defined($r->param("problemSeed")) and $permissionLevel>= $professorPermissionLevel; # only allow this for professors 1213 1214 1215 # end of main form 1216 print CGI::endform(); 1217 1218 print CGI::start_div({class=>"problemFooter"}); 1219 1220 ## arguments for answer inspection button 1221 #my $prof_url = $ce->{webworkURLs}->{oldProf}; 1222 #my $webworkURL = $ce->{webworkURLs}->{root}; 1223 #my $cgi_url = $prof_url; 1224 #$cgi_url=~ s|/[^/]*$||; # clip profLogin.pl 1225 #my $authen_args = $self->url_authen_args(); 1226 #my $showPastAnswersURL = "$webworkURL/$courseName/instructor/show_answers/"; 1227 1228 my $pastAnswersPage = $urlpath->newFromModule("WeBWorK::ContentGenerator::Instructor::ShowAnswers", 1229 courseID => $courseName); 1230 my $showPastAnswersURL = $self->systemLink($pastAnswersPage, authen => 0); # no authen info for form action 1231 1232 # print answer inspection button 1233 if ($authz->hasPermissions($user, "view_answers")) { 1234 print "\n", 1235 CGI::start_form(-method=>"POST",-action=>$showPastAnswersURL,-target=>"WW_Info"),"\n", 1236 $self->hidden_authen_fields,"\n", 1237 CGI::hidden(-name => 'courseID', -value=>$courseName), "\n", 1238 CGI::hidden(-name => 'problemID', -value=>$problem->problem_id), "\n", 1239 CGI::hidden(-name => 'setID', -value=>$problem->set_id), "\n", 1240 CGI::hidden(-name => 'studentUser', -value=>$problem->user_id), "\n", 1241 CGI::p( {-align=>"left"}, 1242 CGI::submit(-name => 'action', -value=>'Show Past Answers') 1243 ), "\n", 1244 CGI::endform(); 1245 } 1246 1247 1248 print $self->feedbackMacro( 1249 module => __PACKAGE__, 1250 set => $self->{set}->set_id, 1251 problem => $problem->problem_id, 1252 displayMode => $self->{displayMode}, 1253 showOldAnswers => $will{showOldAnswers}, 1254 showCorrectAnswers => $will{showCorrectAnswers}, 1255 showHints => $will{showHints}, 1256 showSolutions => $will{showSolutions}, 1257 pg_object => $pg, 1258 ); 1259 1260 print CGI::end_div(); 1261 1262 # debugging stuff 1263 if (0) { 1264 print 1265 CGI::hr(), 1266 CGI::h2("debugging information"), 1267 CGI::h3("form fields"), 1268 ref2string($self->{formFields}), 1269 CGI::h3("user object"), 1270 ref2string($self->{user}), 1271 CGI::h3("set object"), 1272 ref2string($set), 1273 CGI::h3("problem object"), 1274 ref2string($problem), 1275 CGI::h3("PG object"), 1276 ref2string($pg, {'WeBWorK::PG::Translator' => 1}); 1277 } 1278 debug("leaving body of Problem.pm"); 1279 return ""; 1280 } 1281 1282 1;
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