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Remove unneeded warning.
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 1.223 2010/05/25 18:22:12 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 $correctAnswer = $answerResult->{correct_ans}; 246 my $answerScore = $answerResult->{score}; 247 my $answerMessage = $showMessages ? $answerResult->{ans_message} : ""; 248 $answerMessage =~ s/\n/<BR>/g; 249 $numCorrect += $answerScore >= 1; 250 $numBlanks++ unless $studentAnswer =~/\S/ || $answerScore >= 1; # unless student answer contains entry 251 my $resultString = $answerScore >= 1 ? "correct" : 252 $answerScore > 0 ? int($answerScore*100)."% correct" : 253 "incorrect"; 254 $fully = 'completely ' if $answerScore >0 and $answerScore < 1; 255 256 # get rid of the goofy prefix on the answer names (supposedly, the format 257 # of the answer names is changeable. this only fixes it for "AnSwEr" 258 #$name =~ s/^AnSwEr//; 259 260 my $row; 261 #$row .= CGI::td($name); 262 $row .= $showAttemptAnswers ? CGI::td($self->nbsp($studentAnswer)) : ""; 263 $row .= $showAttemptPreview ? CGI::td($self->nbsp($preview)) : ""; 264 $row .= $showCorrectAnswers ? CGI::td($self->nbsp($correctAnswer)) : ""; 265 $row .= $showAttemptResults ? CGI::td($self->nbsp($resultString)) : ""; 266 $row .= $showMessages ? CGI::td({-class=>"Message"},$self->nbsp($answerMessage)) : ""; 267 push @tableRows, $row; 268 } 269 270 # render equation images 271 $imgGen->render(refresh => 1); 272 273 # my $numIncorrectNoun = scalar @answerNames == 1 ? "question" : "questions"; 274 my $scorePercent = sprintf("%.0f%%", $problemResult->{score} * 100); 275 # FIXME -- I left the old code in in case we have to back out. 276 # my $summary = "On this attempt, you answered $numCorrect out of " 277 # . scalar @answerNames . " $numIncorrectNoun correct, for a score of $scorePercent."; 278 my $summary = ""; 279 unless (defined($problemResult->{summary}) and $problemResult->{summary} =~ /\S/) { 280 if (scalar @answerNames == 1) { #default messages 281 if ($numCorrect == scalar @answerNames) { 282 $summary .= CGI::div({class=>"ResultsWithoutError"},"The answer above is correct."); 283 } else { 284 $summary .= CGI::div({class=>"ResultsWithError"},"The answer above is NOT ${fully}correct."); 285 } 286 } else { 287 if ($numCorrect == scalar @answerNames) { 288 $summary .= CGI::div({class=>"ResultsWithoutError"},"All of the answers above are correct."); 289 } 290 unless ($numCorrect + $numBlanks == scalar( @answerNames)) { 291 $summary .= CGI::div({class=>"ResultsWithError"},"At least one of the answers above is NOT ${fully}correct."); 292 } 293 if ($numBlanks) { 294 my $s = ($numBlanks>1)?'':'s'; 295 $summary .= CGI::div({class=>"ResultsAlert"},"$numBlanks of the questions remain$s unanswered."); 296 } 297 } 298 } else { 299 $summary = $problemResult->{summary}; # summary has been defined by grader 300 } 301 return 302 CGI::table({-class=>"attemptResults"}, CGI::Tr(\@tableRows)) 303 . ($showSummary ? CGI::p({class=>'attemptResultsSummary'},$summary) : ""); 304 } 305 306 307 # Note: previewAnswer is lifted into GatewayQuiz.pm 308 309 sub previewAnswer { 310 my ($self, $answerResult, $imgGen, $tthPreambleCache) = @_; 311 my $ce = $self->r->ce; 312 my $effectiveUser = $self->{effectiveUser}; 313 my $set = $self->{set}; 314 my $problem = $self->{problem}; 315 my $displayMode = $self->{displayMode}; 316 317 # note: right now, we have to do things completely differently when we are 318 # rendering math from INSIDE the translator and from OUTSIDE the translator. 319 # so we'll just deal with each case explicitly here. there's some code 320 # duplication that can be dealt with later by abstracting out tth/dvipng/etc. 321 322 my $tex = $answerResult->{preview_latex_string}; 323 324 return "" unless defined $tex and $tex ne ""; 325 326 if ($displayMode eq "plainText") { 327 return $tex; 328 } elsif ($displayMode eq "formattedText") { 329 330 # read the TTH preamble, or use the cached copy passed in from the caller 331 my $tthPreamble=''; 332 if (defined $$tthPreambleCache) { 333 $tthPreamble = $$tthPreambleCache; 334 } else { 335 my $tthPreambleFile = $ce->{courseDirs}->{templates} . "/tthPreamble.tex"; 336 if (-r $tthPreambleFile) { 337 $tthPreamble = readFile($tthPreambleFile); 338 # thanks to Jim Martino. each line in the definition file should end with 339 #a % to prevent adding supurious paragraphs to output: 340 $tthPreamble =~ s/(.)\n/$1%\n/g; 341 # solves the problem if the file doesn't end with a return: 342 $tthPreamble .="%\n"; 343 # store preamble in cache: 344 $$tthPreambleCache = $tthPreamble; 345 } else { 346 } 347 } 348 349 # construct TTH command line 350 my $tthCommand = $ce->{externalPrograms}->{tth} 351 . " -L -f5 -u -r 2> /dev/null <<END_OF_INPUT; echo > /dev/null\n" 352 . $tthPreamble . "\\[" . $tex . "\\]\n" 353 . "END_OF_INPUT\n"; 354 355 # call tth 356 my $result = `$tthCommand`; 357 if ($?) { 358 return "<b>[tth failed: $? $@]</b>"; 359 } else { 360 # avoid border problems in tables and remove unneeded initial <br> 361 $result =~ s/(<table [^>]*)>/$1 CLASS="ArrayLayout">/gi; 362 $result =~ s!\s*<br clear="all" />!!; 363 return $result; 364 } 365 366 } elsif ($displayMode eq "images") { 367 $imgGen->add($tex); 368 } elsif ($displayMode eq "jsMath") { 369 $tex =~ s/</</g; $tex =~ s/>/>/g; 370 return '<SPAN CLASS="math">\\displaystyle{'.$tex.'}</SPAN>'; 371 } 372 } 373 374 ################################################################################ 375 # Template escape implementations 376 ################################################################################ 377 378 sub pre_header_initialize { 379 my ($self) = @_; 380 my $r = $self->r; 381 my $ce = $r->ce; 382 my $db = $r->db; 383 my $authz = $r->authz; 384 my $urlpath = $r->urlpath; 385 386 my $setName = $urlpath->arg("setID"); 387 my $problemNumber = $r->urlpath->arg("problemID"); 388 my $userName = $r->param('user'); 389 my $effectiveUserName = $r->param('effectiveUser'); 390 my $key = $r->param('key'); 391 my $editMode = $r->param("editMode"); 392 393 my $user = $db->getUser($userName); # checked 394 die "record for user $userName (real user) does not exist." 395 unless defined $user; 396 397 my $effectiveUser = $db->getUser($effectiveUserName); # checked 398 die "record for user $effectiveUserName (effective user) does not exist." 399 unless defined $effectiveUser; 400 401 # obtain the merged set for $effectiveUser 402 my $set = $db->getMergedSet($effectiveUserName, $setName); # checked 403 404 $self->set_showOldAnswers_default($ce, $userName, $authz, $set); 405 406 # Database fix (in case of undefined published values) 407 # this is only necessary because some people keep holding to ww1.9 which did not have a published field 408 # make sure published is set to 0 or 1 409 if ( $set and $set->published ne "0" and $set->published ne "1") { 410 my $globalSet = $db->getGlobalSet($set->set_id); 411 $globalSet->published("1"); # defaults to published 412 $db->putGlobalSet($globalSet); 413 $set = $db->getMergedSet($effectiveUserName, $setName); 414 } else { 415 # don't do anything just yet, maybe we're a professor and we're 416 # fabricating a set or haven't assigned it to ourselves just yet 417 } 418 # When a set is created enable_reduced_scoring is null, so we have to set it 419 if ( $set and $set->enable_reduced_scoring ne "0" and $set->enable_reduced_scoring ne "1") { 420 my $globalSet = $db->getGlobalSet($set->set_id); 421 $globalSet->enable_reduced_scoring("0"); # defaults to disabled 422 $db->putGlobalSet($globalSet); 423 $set = $db->getMergedSet($effectiveUserName, $setName); 424 } 425 426 427 # obtain the merged problem for $effectiveUser 428 my $problem = $db->getMergedProblem($effectiveUserName, $setName, $problemNumber); # checked 429 430 if ($authz->hasPermissions($userName, "modify_problem_sets")) { 431 # professors are allowed to fabricate sets and problems not 432 # assigned to them (or anyone). this allows them to use the 433 # editor to 434 435 # if a User Set does not exist for this user and this set 436 # then we check the Global Set 437 # if that does not exist we create a fake set 438 # if it does, we add fake user data 439 unless (defined $set) { 440 my $userSetClass = $db->{set_user}->{record}; 441 my $globalSet = $db->getGlobalSet($setName); # checked 442 443 if (not defined $globalSet) { 444 $set = fake_set($db); 445 } else { 446 $set = global2user($userSetClass, $globalSet); 447 $set->psvn(0); 448 } 449 } 450 451 # if that is not yet defined obtain the global problem, 452 # convert it to a user problem, and add fake user data 453 unless (defined $problem) { 454 my $userProblemClass = $db->{problem_user}->{record}; 455 my $globalProblem = $db->getGlobalProblem($setName, $problemNumber); # checked 456 # if the global problem doesn't exist either, bail! 457 if(not defined $globalProblem) { 458 my $sourceFilePath = $r->param("sourceFilePath"); 459 die "sourceFilePath is unsafe!" unless path_is_subdir($sourceFilePath, $ce->{courseDirs}->{templates}, 1); # 1==path can be relative to dir 460 # These are problems from setmaker. If declared invalid, they won't come up 461 $self->{invalidProblem} = $self->{invalidSet} = 1 unless defined $sourceFilePath; 462 # die "Problem $problemNumber in set $setName does not exist" unless defined $sourceFilePath; 463 $problem = fake_problem($db); 464 $problem->problem_id(1); 465 $problem->source_file($sourceFilePath); 466 $problem->user_id($effectiveUserName); 467 } else { 468 $problem = global2user($userProblemClass, $globalProblem); 469 $problem->user_id($effectiveUserName); 470 $problem->problem_seed(0); 471 $problem->status(0); 472 $problem->attempted(0); 473 $problem->last_answer(""); 474 $problem->num_correct(0); 475 $problem->num_incorrect(0); 476 } 477 } 478 479 # now we're sure we have valid UserSet and UserProblem objects 480 # yay! 481 482 # now deal with possible editor overrides: 483 484 # if the caller is asking to override the source file, and 485 # editMode calls for a temporary file, do so 486 my $sourceFilePath = $r->param("sourceFilePath"); 487 if (defined $editMode and $editMode eq "temporaryFile" and defined $sourceFilePath) { 488 die "sourceFilePath is unsafe!" unless path_is_subdir($sourceFilePath, $ce->{courseDirs}->{templates}, 1); # 1==path can be relative to dir 489 $problem->source_file($sourceFilePath); 490 } 491 492 # if the problem does not have a source file or no source file has been passed in 493 # then this is really an invalid problem (probably from a bad URL) 494 $self->{invalidProblem} = not (defined $sourceFilePath or $problem->source_file); 495 496 # if the caller is asking to override the problem seed, do so 497 my $problemSeed = $r->param("problemSeed"); 498 if (defined $problemSeed) { 499 $problem->problem_seed($problemSeed); 500 } 501 502 my $publishedClass = ($set->published) ? "Published" : "Unpublished"; 503 my $publishedText = ($set->published) ? "visible to students." : "hidden from students."; 504 $self->addmessage(CGI::span("This set is " . CGI::font({class=>$publishedClass}, $publishedText))); 505 506 # test for additional problem validity if it's not already invalid 507 } else { 508 $self->{invalidProblem} = !(defined $problem and ($set->published || $authz->hasPermissions($userName, "view_unpublished_sets"))); 509 510 $self->addbadmessage(CGI::p("This problem will not count towards your grade.")) if $problem and not $problem->value and not $self->{invalidProblem}; 511 } 512 513 $self->{userName} = $userName; 514 $self->{effectiveUserName} = $effectiveUserName; 515 $self->{user} = $user; 516 $self->{effectiveUser} = $effectiveUser; 517 $self->{set} = $set; 518 $self->{problem} = $problem; 519 $self->{editMode} = $editMode; 520 521 ##### form processing ##### 522 523 # set options from form fields (see comment at top of file for names) 524 my $displayMode = $r->param("displayMode") || $ce->{pg}->{options}->{displayMode}; 525 my $redisplay = $r->param("redisplay"); 526 my $submitAnswers = $r->param("submitAnswers"); 527 my $checkAnswers = $r->param("checkAnswers"); 528 my $previewAnswers = $r->param("previewAnswers"); 529 530 my $formFields = { WeBWorK::Form->new_from_paramable($r)->Vars }; 531 532 $self->{displayMode} = $displayMode; 533 $self->{redisplay} = $redisplay; 534 $self->{submitAnswers} = $submitAnswers; 535 $self->{checkAnswers} = $checkAnswers; 536 $self->{previewAnswers} = $previewAnswers; 537 $self->{formFields} = $formFields; 538 539 # get result and send to message 540 my $status_message = $r->param("status_message"); 541 $self->addmessage(CGI::p("$status_message")) if $status_message; 542 543 # now that we've set all the necessary variables quit out if the set or problem is invalid 544 return if $self->{invalidSet} || $self->{invalidProblem}; 545 546 ##### permissions ##### 547 548 # what does the user want to do? 549 #FIXME There is a problem with checkboxes -- if they are not checked they are invisible. Hence if the default mode in $ce is 1 550 # there is no way to override this. Probably this is ok for the last three options, but it was definitely not ok for showing 551 # saved answers which is normally on, but you want to be able to turn it off! This section should be moved to ContentGenerator 552 # so that you can set these options anywhere. We also need mechanisms for making them sticky. 553 # Note: ProblemSet and ProblemSets might set showOldAnswers to '', which 554 # needs to be treated as if it is not set. 555 my %want = ( 556 showOldAnswers => (defined($r->param("showOldAnswers")) and $r->param("showOldAnswers") ne '') ? $r->param("showOldAnswers") : $ce->{pg}->{options}->{showOldAnswers}, 557 showCorrectAnswers => $r->param("showCorrectAnswers") || $ce->{pg}->{options}->{showCorrectAnswers}, 558 showHints => $r->param("showHints") || $ce->{pg}->{options}->{showHints}, 559 showSolutions => $r->param("showSolutions") || $ce->{pg}->{options}->{showSolutions}, 560 recordAnswers => $submitAnswers, 561 checkAnswers => $checkAnswers, 562 getSubmitButton => 1, 563 ); 564 565 # are certain options enforced? 566 my %must = ( 567 showOldAnswers => 0, 568 showCorrectAnswers => 0, 569 showHints => 0, 570 showSolutions => 0, 571 recordAnswers => ! $authz->hasPermissions($userName, "avoid_recording_answers"), 572 checkAnswers => 0, 573 getSubmitButton => 0, 574 ); 575 576 # does the user have permission to use certain options? 577 my @args = ($user, $effectiveUser, $set, $problem); 578 my %can = ( 579 showOldAnswers => $self->can_showOldAnswers(@args), 580 showCorrectAnswers => $self->can_showCorrectAnswers(@args), 581 showHints => $self->can_showHints(@args), 582 showSolutions => $self->can_showSolutions(@args), 583 recordAnswers => $self->can_recordAnswers(@args, 0), 584 checkAnswers => $self->can_checkAnswers(@args, $submitAnswers), 585 getSubmitButton => $self->can_recordAnswers(@args, $submitAnswers), 586 ); 587 588 # final values for options 589 my %will; 590 foreach (keys %must) { 591 $will{$_} = $can{$_} && ($want{$_} || $must{$_}); 592 #warn "final values for options $_ is can $can{$_}, want $want{$_}, must $must{$_}, will $will{$_}"; 593 } 594 595 ##### sticky answers ##### 596 597 if (not ($submitAnswers or $previewAnswers or $checkAnswers) and $will{showOldAnswers}) { 598 # do this only if new answers are NOT being submitted 599 my %oldAnswers = decodeAnswers($problem->last_answer); 600 $formFields->{$_} = $oldAnswers{$_} foreach keys %oldAnswers; 601 } 602 603 ##### translation ##### 604 605 debug("begin pg processing"); 606 my $pg = WeBWorK::PG->new( 607 $ce, 608 $effectiveUser, 609 $key, 610 $set, 611 $problem, 612 $set->psvn, # FIXME: this field should be removed 613 $formFields, 614 { # translation options 615 displayMode => $displayMode, 616 showHints => $will{showHints}, 617 showSolutions => $will{showSolutions}, 618 refreshMath2img => $will{showHints} || $will{showSolutions}, 619 processAnswers => 1, 620 permissionLevel => $db->getPermissionLevel($userName)->permission, 621 effectivePermissionLevel => $db->getPermissionLevel($effectiveUserName)->permission, 622 }, 623 ); 624 625 debug("end pg processing"); 626 627 ##### fix hint/solution options ##### 628 629 $can{showHints} &&= $pg->{flags}->{hintExists} 630 &&= $pg->{flags}->{showHintLimit}<=$pg->{state}->{num_of_incorrect_ans}; 631 $can{showSolutions} &&= $pg->{flags}->{solutionExists}; 632 633 ##### store fields ##### 634 635 $self->{want} = \%want; 636 $self->{must} = \%must; 637 $self->{can} = \%can; 638 $self->{will} = \%will; 639 $self->{pg} = $pg; 640 } 641 642 sub if_errors($$) { 643 my ($self, $arg) = @_; 644 645 if ($self->{isOpen}) { 646 return $self->{pg}->{flags}->{error_flag} ? $arg : !$arg; 647 } else { 648 return !$arg; 649 } 650 } 651 652 sub head { 653 my ($self) = @_; 654 655 return "" if ( $self->{invalidSet} ); 656 return $self->{pg}->{head_text} if $self->{pg}->{head_text}; 657 } 658 659 sub options { 660 my ($self) = @_; 661 #warn "doing options in Problem"; 662 663 # don't show options if we don't have anything to show 664 return "" if $self->{invalidSet} or $self->{invalidProblem}; 665 666 my $displayMode = $self->{displayMode}; 667 my %can = %{ $self->{can} }; 668 669 my @options_to_show = "displayMode"; 670 push @options_to_show, "showOldAnswers" if $can{showOldAnswers}; 671 push @options_to_show, "showHints" if $can{showHints}; 672 push @options_to_show, "showSolutions" if $can{showSolutions}; 673 674 return $self->optionsMacro( 675 options_to_show => \@options_to_show, 676 extra_params => ["editMode", "sourceFilePath"], 677 ); 678 } 679 680 sub siblings { 681 my ($self) = @_; 682 my $r = $self->r; 683 my $db = $r->db; 684 my $urlpath = $r->urlpath; 685 686 # can't show sibling problems if the set is invalid 687 return "" if $self->{invalidSet}; 688 689 my $courseID = $urlpath->arg("courseID"); 690 my $setID = $self->{set}->set_id; 691 my $eUserID = $r->param("effectiveUser"); 692 my @problemIDs = sort { $a <=> $b } $db->listUserProblems($eUserID, $setID); 693 694 print CGI::start_div({class=>"info-box", id=>"fisheye"}); 695 print CGI::h2("Problems"); 696 #print CGI::start_ul({class=>"LinksMenu"}); 697 #print CGI::start_li(); 698 #print CGI::span({style=>"font-size:larger"}, "Problems"); 699 print CGI::start_ul(); 700 701 foreach my $problemID (@problemIDs) { 702 my $problemPage = $urlpath->newFromModule("WeBWorK::ContentGenerator::Problem", 703 courseID => $courseID, setID => $setID, problemID => $problemID); 704 print CGI::li(CGI::a( {href=>$self->systemLink($problemPage, 705 params=>{ displayMode => $self->{displayMode}, 706 showOldAnswers => $self->{will}->{showOldAnswers} 707 })}, "Problem $problemID") 708 ); 709 } 710 711 print CGI::end_ul(); 712 #print CGI::end_li(); 713 #print CGI::end_ul(); 714 print CGI::end_div(); 715 716 return ""; 717 } 718 719 sub nav { 720 my ($self, $args) = @_; 721 my $r = $self->r; 722 my $db = $r->db; 723 my $urlpath = $r->urlpath; 724 725 return "" if ( $self->{invalidSet} ); 726 727 my $courseID = $urlpath->arg("courseID"); 728 my $setID = $self->{set}->set_id if !($self->{invalidSet}); 729 my $problemID = $self->{problem}->problem_id if !($self->{invalidProblem}); 730 my $eUserID = $r->param("effectiveUser"); 731 732 my ($prevID, $nextID); 733 734 if (!$self->{invalidProblem}) { 735 my @problemIDs = $db->listUserProblems($eUserID, $setID); 736 foreach my $id (@problemIDs) { 737 $prevID = $id if $id < $problemID 738 and (not defined $prevID or $id > $prevID); 739 $nextID = $id if $id > $problemID 740 and (not defined $nextID or $id < $nextID); 741 } 742 } 743 744 my @links; 745 746 if ($prevID) { 747 my $prevPage = $urlpath->newFromModule(__PACKAGE__, 748 courseID => $courseID, setID => $setID, problemID => $prevID); 749 push @links, "Previous Problem", $r->location . $prevPage->path, "navPrev"; 750 } else { 751 push @links, "Previous Problem", "", "navPrevGrey"; 752 } 753 754 if (defined($setID) && $setID ne 'Undefined_Set') { 755 push @links, "Problem List", $r->location . $urlpath->parent->path, "navProbList"; 756 } else { 757 push @links, "Problem List", "", "navProbListGrey"; 758 } 759 760 if ($nextID) { 761 my $nextPage = $urlpath->newFromModule(__PACKAGE__, 762 courseID => $courseID, setID => $setID, problemID => $nextID); 763 push @links, "Next Problem", $r->location . $nextPage->path, "navNext"; 764 } else { 765 push @links, "Next Problem", "", "navNextGrey"; 766 } 767 768 my $tail = ""; 769 770 $tail .= "&displayMode=".$self->{displayMode} if defined $self->{displayMode}; 771 $tail .= "&showOldAnswers=".$self->{will}->{showOldAnswers} 772 if defined $self->{will}->{showOldAnswers}; 773 return $self->navMacro($args, $tail, @links); 774 } 775 776 sub title { 777 my ($self) = @_; 778 779 # using the url arguments won't break if the set/problem are invalid 780 my $setID = WeBWorK::ContentGenerator::underscore2nbsp($self->r->urlpath->arg("setID")); 781 my $problemID = $self->r->urlpath->arg("problemID"); 782 783 return "$setID: Problem $problemID"; 784 } 785 786 sub body { 787 my $self = shift; 788 my $r = $self->r; 789 my $ce = $r->ce; 790 my $db = $r->db; 791 my $authz = $r->authz; 792 my $urlpath = $r->urlpath; 793 my $user = $r->param('user'); 794 my $effectiveUser = $r->param('effectiveUser'); 795 796 if ( $self->{invalidSet} ) { 797 return CGI::div({class=>"ResultsWithError"}, 798 CGI::p("The selected problem set (" . 799 $urlpath->arg("setID") . ") is not " . 800 "a valid set for $effectiveUser:"), 801 CGI::p($self->{invalidSet})); 802 } 803 804 if ($self->{invalidProblem}) { 805 return CGI::div({class=>"ResultsWithError"}, 806 CGI::p("The selected problem (" . $urlpath->arg("problemID") . ") is not a valid problem for set " . $self->{set}->set_id . ".")); 807 } 808 809 # unpack some useful variables 810 my $set = $self->{set}; 811 my $problem = $self->{problem}; 812 my $editMode = $self->{editMode}; 813 my $submitAnswers = $self->{submitAnswers}; 814 my $checkAnswers = $self->{checkAnswers}; 815 my $previewAnswers = $self->{previewAnswers}; 816 my %want = %{ $self->{want} }; 817 my %can = %{ $self->{can} }; 818 my %must = %{ $self->{must} }; 819 my %will = %{ $self->{will} }; 820 my $pg = $self->{pg}; 821 822 my $courseName = $urlpath->arg("courseID"); 823 824 # FIXME: move editor link to top, next to problem number. 825 # format as "[edit]" like we're doing with course info file, etc. 826 # add edit link for set as well. 827 my $editorLink = ""; 828 # if we are here without a real homework set, carry that through 829 my $forced_field = []; 830 $forced_field = ['sourceFilePath' => $r->param("sourceFilePath")] if 831 ($set->set_id eq 'Undefined_Set'); 832 if ($authz->hasPermissions($user, "modify_problem_sets")) { 833 my $editorPage = $urlpath->newFromModule("WeBWorK::ContentGenerator::Instructor::PGProblemEditor", 834 courseID => $courseName, setID => $set->set_id, problemID => $problem->problem_id); 835 my $editorURL = $self->systemLink($editorPage, params=>$forced_field); 836 $editorLink = CGI::p(CGI::a({href=>$editorURL,target =>'WW_Editor'}, "Edit this problem")); 837 } 838 839 ##### translation errors? ##### 840 841 if ($pg->{flags}->{error_flag}) { 842 if ($authz->hasPermissions($user, "view_problem_debugging_info")) { 843 print $self->errorOutput($pg->{errors}, $pg->{body_text}); 844 } else { 845 print $self->errorOutput($pg->{errors}, "You do not have permission to view the details of this error."); 846 } 847 print $editorLink; 848 return ""; 849 } 850 851 ##### answer processing ##### 852 debug("begin answer processing"); 853 # if answers were submitted: 854 my $scoreRecordedMessage; 855 my $pureProblem; 856 if ($submitAnswers) { 857 # get a "pure" (unmerged) UserProblem to modify 858 # this will be undefined if the problem has not been assigned to this user 859 $pureProblem = $db->getUserProblem($problem->user_id, $problem->set_id, $problem->problem_id); # checked 860 if (defined $pureProblem) { 861 # store answers in DB for sticky answers 862 my %answersToStore; 863 my %answerHash = %{ $pg->{answers} }; 864 $answersToStore{$_} = $self->{formFields}->{$_} #$answerHash{$_}->{original_student_ans} -- this may have been modified for fields with multiple values. Don't use it!! 865 foreach (keys %answerHash); 866 867 # There may be some more answers to store -- one which are auxiliary entries to a primary answer. Evaluating 868 # matrices works in this way, only the first answer triggers an answer evaluator, the rest are just inputs 869 # however we need to store them. Fortunately they are still in the input form. 870 my @extra_answer_names = @{ $pg->{flags}->{KEPT_EXTRA_ANSWERS}}; 871 $answersToStore{$_} = $self->{formFields}->{$_} foreach (@extra_answer_names); 872 873 # Now let's encode these answers to store them -- append the extra answers to the end of answer entry order 874 my @answer_order = (@{$pg->{flags}->{ANSWER_ENTRY_ORDER}}, @extra_answer_names); 875 my $answerString = encodeAnswers(%answersToStore, 876 @answer_order); 877 878 # store last answer to database 879 $problem->last_answer($answerString); 880 $pureProblem->last_answer($answerString); 881 $db->putUserProblem($pureProblem); 882 883 # store state in DB if it makes sense 884 if ($will{recordAnswers}) { 885 $problem->status($pg->{state}->{recorded_score}); 886 $problem->sub_status($pg->{state}->{sub_recorded_score}); 887 $problem->attempted(1); 888 $problem->num_correct($pg->{state}->{num_of_correct_ans}); 889 $problem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 890 $pureProblem->status($pg->{state}->{recorded_score}); 891 $pureProblem->sub_status($pg->{state}->{sub_recorded_score}); 892 $pureProblem->attempted(1); 893 $pureProblem->num_correct($pg->{state}->{num_of_correct_ans}); 894 $pureProblem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 895 if ($db->putUserProblem($pureProblem)) { 896 $scoreRecordedMessage = "Your score was recorded."; 897 } else { 898 $scoreRecordedMessage = "Your score was not recorded because there was a failure in storing the problem record to the database."; 899 } 900 # write to the transaction log, just to make sure 901 writeLog($self->{ce}, "transaction", 902 $problem->problem_id."\t". 903 $problem->set_id."\t". 904 $problem->user_id."\t". 905 $problem->source_file."\t". 906 $problem->value."\t". 907 $problem->max_attempts."\t". 908 $problem->problem_seed."\t". 909 $pureProblem->status."\t". 910 $pureProblem->attempted."\t". 911 $pureProblem->last_answer."\t". 912 $pureProblem->num_correct."\t". 913 $pureProblem->num_incorrect 914 ); 915 } else { 916 if (before($set->open_date) or after($set->due_date)) { 917 $scoreRecordedMessage = "Your score was not recorded because this homework set is closed."; 918 } else { 919 $scoreRecordedMessage = "Your score was not recorded."; 920 } 921 } 922 } else { 923 $scoreRecordedMessage = "Your score was not recorded because this problem has not been assigned to you."; 924 } 925 } 926 927 # logging student answers 928 929 my $answer_log = $self->{ce}->{courseFiles}->{logs}->{'answer_log'}; 930 if ( defined($answer_log ) and defined($pureProblem)) { 931 if ($submitAnswers && !$authz->hasPermissions($effectiveUser, "dont_log_past_answers")) { 932 my $answerString = ""; my $scores = ""; 933 my %answerHash = %{ $pg->{answers} }; 934 # FIXME this is the line 552 error. make sure original student ans is defined. 935 # The fact that it is not defined is probably due to an error in some answer evaluator. 936 # But I think it is useful to suppress this error message in the log. 937 foreach (sortByName(undef, keys %answerHash)) { 938 my $orig_ans = $answerHash{$_}->{original_student_ans}; 939 my $student_ans = defined $orig_ans ? $orig_ans : ''; 940 $answerString .= $student_ans."\t"; 941 $scores .= $answerHash{$_}->{score} >= 1 ? "1" : "0"; 942 } 943 $answerString = '' unless defined($answerString); # insure string is defined. 944 writeCourseLog($self->{ce}, "answer_log", 945 join("", 946 '|', $problem->user_id, 947 '|', $problem->set_id, 948 '|', $problem->problem_id, 949 '|', $scores, "\t", 950 time(),"\t", 951 $answerString, 952 ), 953 ); 954 955 } 956 } 957 958 debug("end answer processing"); 959 960 ##### output ##### 961 # custom message for editor 962 if ($authz->hasPermissions($user, "modify_problem_sets") and defined $editMode) { 963 if ($editMode eq "temporaryFile") { 964 print CGI::p(CGI::div({class=>'temporaryFile'}, "Viewing temporary file: ", $problem->source_file)); 965 } elsif ($editMode eq "savedFile") { 966 # taken care of in the initialization phase 967 } 968 } 969 print CGI::start_div({class=>"problemHeader"}); 970 971 972 973 # attempt summary 974 #FIXME -- the following is a kludge: if showPartialCorrectAnswers is negative don't show anything. 975 # until after the due date 976 # do I need to check $will{showCorrectAnswers} to make preflight work?? 977 if (($pg->{flags}->{showPartialCorrectAnswers} >= 0 and $submitAnswers) ) { 978 # print this if user submitted answers OR requested correct answers 979 980 print $self->attemptResults($pg, 1, 981 $will{showCorrectAnswers}, 982 $pg->{flags}->{showPartialCorrectAnswers}, 1, 1); 983 } elsif ($checkAnswers) { 984 # print this if user previewed answers 985 print CGI::div({class=>'ResultsWithError'},"ANSWERS ONLY CHECKED -- ANSWERS NOT RECORDED"), CGI::br(); 986 print $self->attemptResults($pg, 1, $will{showCorrectAnswers}, 1, 1, 1); 987 # show attempt answers 988 # show correct answers if asked 989 # show attempt results (correctness) 990 # show attempt previews 991 } elsif ($previewAnswers) { 992 # print this if user previewed answers 993 print CGI::div({class=>'ResultsWithError'},"PREVIEW ONLY -- ANSWERS NOT RECORDED"),CGI::br(),$self->attemptResults($pg, 1, 0, 0, 0, 1); 994 # show attempt answers 995 # don't show correct answers 996 # don't show attempt results (correctness) 997 # show attempt previews 998 } 999 1000 print CGI::end_div(); 1001 1002 # main form 1003 print "\n"; 1004 print CGI::start_form(-method=>"POST", -action=> $r->uri,-name=>"problemMainForm", onsubmit=>"submitAction()"); 1005 print $self->hidden_authen_fields; 1006 print "\n"; 1007 print CGI::start_div({class=>"problem"}); 1008 print CGI::p($pg->{body_text}); 1009 print CGI::p(CGI::b("Note: "). CGI::i($pg->{result}->{msg})) if $pg->{result}->{msg}; 1010 print $editorLink; # this is empty unless it is appropriate to have an editor link. 1011 print CGI::end_div(); 1012 1013 print CGI::start_p(); 1014 1015 if ($can{showCorrectAnswers}) { 1016 print CGI::checkbox( 1017 -name => "showCorrectAnswers", 1018 -checked => $will{showCorrectAnswers}, 1019 -label => "Show correct answers", 1020 -value => 1, 1021 ); 1022 } 1023 if ($can{showHints}) { 1024 print CGI::div({style=>"color:red"}, 1025 CGI::checkbox( 1026 -name => "showHints", 1027 -checked => $will{showHints}, 1028 -label => "Show Hints", 1029 -value =>1, 1030 ) 1031 ); 1032 } 1033 if ($can{showSolutions}) { 1034 print CGI::checkbox( 1035 -name => "showSolutions", 1036 -checked => $will{showSolutions}, 1037 -label => "Show Solutions", 1038 -value => 1, 1039 ); 1040 } 1041 1042 if ($can{showCorrectAnswers} or $can{showHints} or $can{showSolutions}) { 1043 print CGI::br(); 1044 } 1045 1046 print CGI::submit(-name=>"previewAnswers", -label=>"Preview Answers"); 1047 if ($can{checkAnswers}) { 1048 print CGI::submit(-name=>"checkAnswers", -label=>"Check Answers"); 1049 } 1050 if ($can{getSubmitButton}) { 1051 if ($user ne $effectiveUser) { 1052 # if acting as a student, make it clear that answer submissions will 1053 # apply to the student's records, not the professor's. 1054 print CGI::submit(-name=>"submitAnswers", -label=>"Submit Answers for $effectiveUser"); 1055 } else { 1056 #print CGI::submit(-name=>"submitAnswers", -label=>"Submit Answers", -onclick=>"alert('submit button clicked')"); 1057 print CGI::submit(-name=>"submitAnswers", -label=>"Submit Answers", -onclick=>""); 1058 # FIXME for unknown reasons the -onclick label seems to have to be there in order to allow the forms onsubmit to trigger 1059 # WFT??? 1060 } 1061 } 1062 1063 print CGI::end_p(); 1064 1065 print CGI::start_div({class=>"scoreSummary"}); 1066 1067 # score summary 1068 my $attempts = $problem->num_correct + $problem->num_incorrect; 1069 my $attemptsNoun = $attempts != 1 ? "times" : "time"; 1070 my $problem_status = $problem->status || 0; 1071 my $lastScore = sprintf("%.0f%%", $problem_status * 100); # Round to whole number 1072 my ($attemptsLeft, $attemptsLeftNoun); 1073 if ($problem->max_attempts == -1) { 1074 # unlimited attempts 1075 $attemptsLeft = "unlimited"; 1076 $attemptsLeftNoun = "attempts"; 1077 } else { 1078 $attemptsLeft = $problem->max_attempts - $attempts; 1079 $attemptsLeftNoun = $attemptsLeft == 1 ? "attempt" : "attempts"; 1080 } 1081 1082 my $setClosed = 0; 1083 my $setClosedMessage; 1084 if (before($set->open_date) or after($set->due_date)) { 1085 $setClosed = 1; 1086 if (before($set->open_date)) { 1087 $setClosedMessage = "This homework set is not yet open."; 1088 } elsif (after($set->due_date)) { 1089 $setClosedMessage = "This homework set is closed."; 1090 } 1091 } 1092 #if (before($set->open_date) or after($set->due_date)) { 1093 # $setClosed = 1; 1094 # $setClosedMessage = "This homework set is closed."; 1095 # if ($authz->hasPermissions($user, "view_answers")) { 1096 # $setClosedMessage .= " However, since you are a privileged user, additional attempts will be recorded."; 1097 # } else { 1098 # $setClosedMessage .= " Additional attempts will not be recorded."; 1099 # } 1100 #} 1101 unless (defined( $pg->{state}->{state_summary_msg}) and $pg->{state}->{state_summary_msg}=~/\S/) { 1102 my $notCountedMessage = ($problem->value) ? "" : "(This problem will not count towards your grade.)"; 1103 print CGI::p(join("", 1104 $submitAnswers ? $scoreRecordedMessage . CGI::br() : "", 1105 "You have attempted this problem $attempts $attemptsNoun.", CGI::br(), 1106 $submitAnswers ?"You received a score of ".sprintf("%.0f%%", $pg->{result}->{score} * 100)." for this attempt.".CGI::br():'', 1107 $problem->attempted 1108 ? "Your overall recorded score is $lastScore. $notCountedMessage" . CGI::br() 1109 : "", 1110 $setClosed ? $setClosedMessage : "You have $attemptsLeft $attemptsLeftNoun remaining." 1111 )); 1112 }else { 1113 print CGI::p($pg->{state}->{state_summary_msg}); 1114 } 1115 print CGI::end_div(); 1116 1117 # save state for viewOptions 1118 print CGI::hidden( 1119 -name => "showOldAnswers", 1120 -value => $will{showOldAnswers} 1121 ), 1122 1123 CGI::hidden( 1124 -name => "displayMode", 1125 -value => $self->{displayMode} 1126 ); 1127 print( CGI::hidden( 1128 -name => 'editMode', 1129 -value => $self->{editMode}, 1130 ) 1131 ) if defined($self->{editMode}) and $self->{editMode} eq 'temporaryFile'; 1132 1133 # this is a security risk -- students can use this to find the source code for the problem 1134 1135 my $permissionLevel = $db->getPermissionLevel($user)->permission; 1136 my $professorPermissionLevel = $ce->{userRoles}->{professor}; 1137 print( CGI::hidden( 1138 -name => 'sourceFilePath', 1139 -value => $self->{problem}->{source_file} 1140 )) if defined($self->{problem}->{source_file}) and $permissionLevel>= $professorPermissionLevel; # only allow this for professors 1141 1142 print( CGI::hidden( 1143 -name => 'problemSeed', 1144 -value => $r->param("problemSeed") 1145 )) if defined($r->param("problemSeed")) and $permissionLevel>= $professorPermissionLevel; # only allow this for professors 1146 1147 1148 # end of main form 1149 print CGI::endform(); 1150 1151 print CGI::start_div({class=>"problemFooter"}); 1152 1153 ## arguments for answer inspection button 1154 #my $prof_url = $ce->{webworkURLs}->{oldProf}; 1155 #my $webworkURL = $ce->{webworkURLs}->{root}; 1156 #my $cgi_url = $prof_url; 1157 #$cgi_url=~ s|/[^/]*$||; # clip profLogin.pl 1158 #my $authen_args = $self->url_authen_args(); 1159 #my $showPastAnswersURL = "$webworkURL/$courseName/instructor/show_answers/"; 1160 1161 my $pastAnswersPage = $urlpath->newFromModule("WeBWorK::ContentGenerator::Instructor::ShowAnswers", 1162 courseID => $courseName); 1163 my $showPastAnswersURL = $self->systemLink($pastAnswersPage, authen => 0); # no authen info for form action 1164 1165 # print answer inspection button 1166 if ($authz->hasPermissions($user, "view_answers")) { 1167 print "\n", 1168 CGI::start_form(-method=>"POST",-action=>$showPastAnswersURL,-target=>"WW_Info"),"\n", 1169 $self->hidden_authen_fields,"\n", 1170 CGI::hidden(-name => 'courseID', -value=>$courseName), "\n", 1171 CGI::hidden(-name => 'problemID', -value=>$problem->problem_id), "\n", 1172 CGI::hidden(-name => 'setID', -value=>$problem->set_id), "\n", 1173 CGI::hidden(-name => 'studentUser', -value=>$problem->user_id), "\n", 1174 CGI::p( {-align=>"left"}, 1175 CGI::submit(-name => 'action', -value=>'Show Past Answers') 1176 ), "\n", 1177 CGI::endform(); 1178 } 1179 1180 1181 print $self->feedbackMacro( 1182 module => __PACKAGE__, 1183 set => $self->{set}->set_id, 1184 problem => $problem->problem_id, 1185 displayMode => $self->{displayMode}, 1186 showOldAnswers => $will{showOldAnswers}, 1187 showCorrectAnswers => $will{showCorrectAnswers}, 1188 showHints => $will{showHints}, 1189 showSolutions => $will{showSolutions}, 1190 pg_object => $pg, 1191 ); 1192 1193 print CGI::end_div(); 1194 1195 # debugging stuff 1196 if (0) { 1197 print 1198 CGI::hr(), 1199 CGI::h2("debugging information"), 1200 CGI::h3("form fields"), 1201 ref2string($self->{formFields}), 1202 CGI::h3("user object"), 1203 ref2string($self->{user}), 1204 CGI::h3("set object"), 1205 ref2string($set), 1206 CGI::h3("problem object"), 1207 ref2string($problem), 1208 CGI::h3("PG object"), 1209 ref2string($pg, {'WeBWorK::PG::Translator' => 1}); 1210 } 1211 debug("leaving body of Problem.pm"); 1212 return ""; 1213 } 1214 1215 1;
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