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Fixed bug 143 Implemented temporary solution suggested in bug 110 (I think this could be the permanent solution) Fixed bug 53
1 ################################################################################ 2 # WeBWorK mod_perl (c) 2000-2002 WeBWorK Project 3 # $Id$ 4 ################################################################################ 5 6 package WeBWorK::ContentGenerator::Problem; 7 use base qw(WeBWorK::ContentGenerator); 8 9 =head1 NAME 10 11 WeBWorK::ContentGenerator::Problem - Allow a student to interact with a problem. 12 13 =cut 14 my $timer0_ON=1; # times pg translation phase 15 use strict; 16 use warnings; 17 use CGI qw(); 18 use File::Path qw(rmtree); 19 use WeBWorK::Form; 20 use WeBWorK::PG; 21 use WeBWorK::PG::ImageGenerator; 22 use WeBWorK::PG::IO; 23 use WeBWorK::Utils qw(writeLog writeCourseLog encodeAnswers decodeAnswers ref2string makeTempDirectory); 24 use WeBWorK::DB::Utils qw(global2user user2global findDefaults); 25 use WeBWorK::Timing; 26 27 ############################################################ 28 # 29 # user 30 # effectiveUser 31 # key 32 # 33 # displayMode 34 # showOldAnswers 35 # showCorrectAnswers 36 # showHints 37 # showSolutions 38 # 39 # AnSwEr# - answer blanks in problem 40 # 41 # redisplay - name of the "Redisplay Problem" button 42 # submitAnswers - name of "Submit Answers" button 43 # checkAnswers - name of the "Check Answers" button 44 # previewAnswers - name of the "Preview Answers" button 45 # 46 ############################################################ 47 48 sub templateName { 49 "problem"; 50 } 51 52 sub pre_header_initialize { 53 my ($self, $setName, $problemNumber) = @_; 54 my $r = $self->{r}; 55 my $courseEnv = $self->{ce}; 56 my $db = $self->{db}; 57 my $userName = $r->param('user'); 58 my $effectiveUserName = $r->param('effectiveUser'); 59 my $key = $r->param('key'); 60 my $user = $db->getUser($userName); 61 my $effectiveUser = $db->getUser($effectiveUserName); 62 my $permissionLevel = $db->getPermissionLevel($userName)->permission(); 63 64 # obtain the merged set for $effectiveUser 65 my $set = $db->getMergedSet($effectiveUserName, $setName); 66 67 # obtain the merged problem for $effectiveUser 68 my $problem = $db->getMergedProblem($effectiveUserName, $setName, $problemNumber); 69 70 my $editMode = $r->param("editMode"); 71 72 if ($permissionLevel > 0 and defined $editMode) { 73 # professors are allowed to fabricate sets and problems not 74 # assigned to them (or anyone). this allows them to use the 75 # editor to 76 77 # if that is not yet defined obtain the global set, convert 78 # it to a user set, and add fake user data 79 unless (defined $set) { 80 my $userSetClass = $db->{set_user}->{record}; 81 $set = global2user($userSetClass, 82 $db->getGlobalSet($setName)); 83 die "Set $setName does not exist" 84 unless defined $set; 85 $set->psvn(0); 86 } 87 88 # if that is not yet defined obtain the global problem, 89 # convert it to a user problem, and add fake user data 90 unless (defined $problem) { 91 my $userProblemClass = $db->{problem_user}->{record}; 92 $problem = global2user($userProblemClass, 93 $db->getGlobalProblem($setName,$problemNumber)); 94 die "Problem $problemNumber in set $setName does not exist" 95 unless defined $problem; 96 $problem->user_id($effectiveUserName); 97 $problem->problem_seed(0); 98 $problem->status(0); 99 $problem->attempted(0); 100 $problem->last_answer(""); 101 $problem->num_correct(0); 102 $problem->num_incorrect(0); 103 } 104 105 # now we're sure we have valid UserSet and UserProblem objects 106 # yay! 107 108 # now deal with possible editor overrides: 109 110 # if the caller is asking to override the source file, and 111 # editMode calls for a temporary file, do so 112 my $sourceFilePath = $r->param("sourceFilePath"); 113 if (defined $sourceFilePath and $editMode eq "temporaryFile") { 114 $problem->source_file($sourceFilePath); 115 } 116 117 # if the caller is asking to override the problem seed, do so 118 my $problemSeed = $r->param("problemSeed"); 119 if (defined $problemSeed) { 120 $problem->problem_seed($problemSeed); 121 } 122 } else { 123 # students can't view problems not assigned to them 124 die "Set $setName is not assigned to $effectiveUserName" 125 unless defined $set; 126 die "Problem $problemNumber in set $setName is not assigned to $effectiveUserName" 127 unless defined $problem; 128 } 129 130 $self->{userName} = $userName; 131 $self->{effectiveUserName} = $effectiveUserName; 132 $self->{user} = $user; 133 $self->{effectiveUser} = $effectiveUser; 134 $self->{permissionLevel} = $permissionLevel; 135 $self->{set} = $set; 136 $self->{problem} = $problem; 137 $self->{editMode} = $editMode; 138 139 ##### form processing ##### 140 141 # set options from form fields (see comment at top of file for names) 142 my $displayMode = $r->param("displayMode") || $courseEnv->{pg}->{options}->{displayMode}; 143 my $redisplay = $r->param("redisplay"); 144 my $submitAnswers = $r->param("submitAnswers"); 145 my $checkAnswers = $r->param("checkAnswers"); 146 my $previewAnswers = $r->param("previewAnswers"); 147 148 # fields which may be defined when using Problem Editor 149 #my $override_seed = ($permissionLevel>=10) ? $r->param('problemSeed') : undef; 150 #my $override_problem_source = ($permissionLevel>=10) ? $r->param('sourceFilePath') : undef; 151 #my $editMode = undef; 152 #my $submit_button = $r->param('submit_button'); 153 #if ( defined($submit_button ) ) { 154 # $editMode = "temporaryFile" if $submit_button eq 'Refresh'; 155 # $editMode = 'savedFile' if $submit_button eq 'Save'; 156 #} 157 # 158 ##override using the source file data from the form field 159 #$problem->source_file($override_problem_source) if defined($override_problem_source); 160 #$problem->problem_seed($override_seed) if defined($override_seed); 161 # 162 ## store path to source file for title. 163 #$self->{problem_source_name} = $problem->source_file; 164 #$self->{edit_mode} = $editMode; 165 #$self->{current_problem_source} = (defined($override_problem_source) ) ? 166 167 # coerce form fields into CGI::Vars format 168 my $formFields = { WeBWorK::Form->new_from_paramable($r)->Vars }; 169 170 $self->{displayMode} = $displayMode; 171 $self->{redisplay} = $redisplay; 172 $self->{submitAnswers} = $submitAnswers; 173 $self->{checkAnswers} = $checkAnswers; 174 $self->{previewAnswers} = $previewAnswers; 175 $self->{formFields} = $formFields; 176 177 ##### permissions ##### 178 179 # are we allowed to view this problem? 180 $self->{isOpen} = time >= $set->open_date || $permissionLevel > 0; 181 return unless $self->{isOpen}; 182 183 # what does the user want to do? 184 my %want = ( 185 showOldAnswers => $r->param("showOldAnswers") || $courseEnv->{pg}->{options}->{showOldAnswers}, 186 showCorrectAnswers => $r->param("showCorrectAnswers") || $courseEnv->{pg}->{options}->{showCorrectAnswers}, 187 showHints => $r->param("showHints") || $courseEnv->{pg}->{options}->{showHints}, 188 showSolutions => $r->param("showSolutions") || $courseEnv->{pg}->{options}->{showSolutions}, 189 recordAnswers => $submitAnswers, 190 checkAnswers => $checkAnswers, 191 ); 192 193 # are certain options enforced? 194 my %must = ( 195 showOldAnswers => 0, 196 showCorrectAnswers => 0, 197 showHints => 0, 198 showSolutions => 0, 199 recordAnswers => mustRecordAnswers($permissionLevel), 200 checkAnswers => 0, 201 ); 202 203 # does the user have permission to use certain options? 204 my %can = ( 205 showOldAnswers => 1, 206 showCorrectAnswers => canShowCorrectAnswers($permissionLevel, $set->answer_date), 207 showHints => 1, 208 showSolutions => canShowSolutions($permissionLevel, $set->answer_date), 209 recordAnswers => canRecordAnswers($permissionLevel, $set->open_date, $set->due_date, 210 $problem->max_attempts, $problem->num_correct + $problem->num_incorrect + 1), 211 # attempts=num_correct+num_incorrect+1, as this happens before updating $problem 212 checkAnswers => canCheckAnswers($permissionLevel, $set->answer_date), 213 ); 214 215 # final values for options 216 my %will; 217 foreach (keys %must) { 218 $will{$_} = $can{$_} && ($want{$_} || $must{$_}); 219 } 220 221 ##### sticky answers ##### 222 223 if (not ($submitAnswers or $previewAnswers or $checkAnswers) and $will{showOldAnswers}) { 224 # do this only if new answers are NOT being submitted 225 my %oldAnswers = decodeAnswers($problem->last_answer); 226 $formFields->{$_} = $oldAnswers{$_} foreach keys %oldAnswers; 227 } 228 229 ##### translation ##### 230 231 $WeBWorK::timer0->continue("begin pg processing") if $timer0_ON; 232 my $pg = WeBWorK::PG->new( 233 $courseEnv, 234 $effectiveUser, 235 $key, 236 $set, 237 $problem, 238 $set->psvn, # FIXME: this field should be removed 239 $formFields, 240 { # translation options 241 displayMode => $displayMode, 242 showHints => $will{showHints}, 243 showSolutions => $will{showSolutions}, 244 refreshMath2img => $will{showHints} || $will{showSolutions}, 245 processAnswers => 1, 246 }, 247 ); 248 249 $WeBWorK::timer0->continue("end pg processing") if $timer0_ON; 250 ##### fix hint/solution options ##### 251 252 $can{showHints} &&= $pg->{flags}->{hintExists}; 253 $can{showSolutions} &&= $pg->{flags}->{solutionExists}; 254 255 ##### store fields ##### 256 257 $self->{want} = \%want; 258 $self->{must} = \%must; 259 $self->{can} = \%can; 260 $self->{will} = \%will; 261 262 $self->{pg} = $pg; 263 } 264 265 #sub if_warnings($$) { 266 # my ($self, $arg) = @_; 267 # return 0 unless $self->{isOpen}; 268 # return $self->{pg}->{warnings} ne ""; 269 #} 270 271 sub if_errors($$) { 272 my ($self, $arg) = @_; 273 return 0 unless $self->{isOpen}; 274 return $self->{pg}->{flags}->{error_flag}; 275 } 276 277 sub head { 278 my $self = shift; 279 return "" unless $self->{isOpen}; 280 return $self->{pg}->{head_text} if $self->{pg}->{head_text}; 281 } 282 283 sub options { 284 my $self = shift; 285 return join("", 286 CGI::start_form("POST", $self->{r}->uri), 287 $self->hidden_authen_fields, 288 CGI::hr(), 289 CGI::start_div({class=>"viewOptions"}), 290 $self->viewOptions(), 291 CGI::end_div(), 292 CGI::end_form() 293 ); 294 } 295 296 sub path { 297 my $self = shift; 298 my $args = $_[-1]; 299 my $setName = $self->{set}->set_id; 300 my $problemNumber = $self->{problem}->problem_id; 301 302 my $ce = $self->{ce}; 303 my $root = $ce->{webworkURLs}->{root}; 304 my $courseName = $ce->{courseName}; 305 return $self->pathMacro($args, 306 "Home" => "$root", 307 $courseName => "$root/$courseName", 308 $setName => "$root/$courseName/$setName", 309 "Problem $problemNumber" => "", 310 ); 311 } 312 313 sub siblings { 314 my $self = shift; 315 my $setName = $self->{set}->set_id; 316 my $problemNumber = $self->{problem}->problem_id; 317 318 my $ce = $self->{ce}; 319 my $db = $self->{db}; 320 my $root = $ce->{webworkURLs}->{root}; 321 my $courseName = $ce->{courseName}; 322 print CGI::strong("Problems"), CGI::br(); 323 324 my $effectiveUser = $self->{r}->param("effectiveUser"); 325 my @problemIDs = $db->listUserProblems($effectiveUser, $setName); 326 foreach my $problem (sort { $a <=> $b } @problemIDs) { 327 print ' '.CGI::a({-href=>"$root/$courseName/$setName/".$problem."/?" 328 . $self->url_authen_args . "&displayMode=" . $self->{displayMode}}, 329 "Problem ".$problem), CGI::br(); 330 } 331 332 return ""; 333 } 334 335 sub nav { 336 $WeBWorK::timer0->continue("begin nav subroutine") if $timer0_ON; 337 my $self = shift; 338 my $args = $_[-1]; 339 my $setName = $self->{set}->set_id; 340 my $problemNumber = $self->{problem}->problem_id; 341 342 my $ce = $self->{ce}; 343 my $db = $self->{db}; 344 my $root = $ce->{webworkURLs}->{root}; 345 my $courseName = $ce->{courseName}; 346 347 my $wwdb = $self->{wwdb}; 348 my $effectiveUser = $self->{r}->param("effectiveUser"); 349 my $tail = "&displayMode=".$self->{displayMode}; 350 351 my @links = ("Problem List" , "$root/$courseName/$setName", "navProbList"); 352 353 my @problemIDs = $db->listUserProblems($effectiveUser, $setName); 354 my ($prevID, $nextID); 355 foreach my $id (@problemIDs) { 356 $prevID = $id if $id < $problemNumber 357 and (not defined $prevID or $id > $prevID); 358 $nextID = $id if $id > $problemNumber 359 and (not defined $nextID or $id < $nextID); 360 } 361 unshift @links, "Previous Problem" , ($prevID 362 ? "$root/$courseName/$setName/".$prevID 363 : "") , "navPrev"; 364 push @links, "Next Problem" , ($nextID 365 ? "$root/$courseName/$setName/".$nextID 366 : "") , "navNext"; 367 368 my $result = $self->navMacro($args, $tail, @links); 369 $WeBWorK::timer0->continue("end nav subroutine") if $timer0_ON; 370 return $result; 371 } 372 373 sub title { 374 my $self = shift; 375 my $setName = $self->{set}->set_id; 376 my $problemNumber = $self->{problem}->problem_id; 377 378 return "$setName : Problem $problemNumber"; 379 } 380 381 sub body { 382 my $self = shift; 383 384 return CGI::p(CGI::font({-color=>"red"}, "This problem is not available because the problem set that contains it is not yet open.")) 385 unless $self->{isOpen}; 386 387 # unpack some useful variables 388 my $r = $self->{r}; 389 my $db = $self->{db}; 390 my $set = $self->{set}; 391 my $problem = $self->{problem}; 392 my $editMode = $self->{editMode}; 393 my $permissionLevel = $self->{permissionLevel}; 394 my $submitAnswers = $self->{submitAnswers}; 395 my $checkAnswers = $self->{checkAnswers}; 396 my $previewAnswers = $self->{previewAnswers}; 397 my %want = %{ $self->{want} }; 398 my %can = %{ $self->{can} }; 399 my %must = %{ $self->{must} }; 400 my %will = %{ $self->{will} }; 401 my $pg = $self->{pg}; 402 403 ##### translation errors? ##### 404 405 if ($pg->{flags}->{error_flag}) { 406 return $self->errorOutput($pg->{errors}, $pg->{body_text}); 407 } 408 409 ##### answer processing ##### 410 $WeBWorK::timer0->continue("begin answer processing") if $timer0_ON; 411 # if answers were submitted: 412 my $scoreRecordedMessage; 413 if ($submitAnswers) { 414 # get a "pure" (unmerged) UserProblem to modify 415 # this will be undefined if the problem has not been assigned to this user 416 my $pureProblem = $db->getUserProblem($problem->user_id, $problem->set_id, $problem->problem_id); 417 if (defined $pureProblem) { 418 # store answers in DB for sticky answers 419 my %answersToStore; 420 my %answerHash = %{ $pg->{answers} }; 421 $answersToStore{$_} = $answerHash{$_}->{original_student_ans} 422 foreach (keys %answerHash); 423 my $answerString = encodeAnswers(%answersToStore, 424 @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }); 425 426 # store last answer to database 427 $problem->last_answer($answerString); 428 $pureProblem->last_answer($answerString); 429 $db->putUserProblem($pureProblem); 430 431 # store state in DB if it makes sense 432 if ($will{recordAnswers}) { 433 $problem->status($pg->{state}->{recorded_score}); 434 $problem->attempted(1); 435 $problem->num_correct($pg->{state}->{num_of_correct_ans}); 436 $problem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 437 $pureProblem->status($pg->{state}->{recorded_score}); 438 $pureProblem->attempted(1); 439 $pureProblem->num_correct($pg->{state}->{num_of_correct_ans}); 440 $pureProblem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 441 if ($db->putUserProblem($pureProblem)) { 442 $scoreRecordedMessage = "Your score was recorded."; 443 } else { 444 $scoreRecordedMessage = "Your score was not recorded because there was a failure in storing the problem record to the database."; 445 } 446 # write to the transaction log, just to make sure 447 writeLog($self->{ce}, "transaction", 448 $problem->problem_id."\t". 449 $problem->set_id."\t". 450 $problem->user_id."\t". 451 $problem->source_file."\t". 452 $problem->value."\t". 453 $problem->max_attempts."\t". 454 $problem->problem_seed."\t". 455 $pureProblem->status."\t". 456 $pureProblem->attempted."\t". 457 $pureProblem->last_answer."\t". 458 $pureProblem->num_correct."\t". 459 $pureProblem->num_incorrect 460 ); 461 } else { 462 if (time < $set->open_date or time > $set->due_date) { 463 $scoreRecordedMessage = "Your score was not recorded because this problem set is closed."; 464 } else { 465 $scoreRecordedMessage = "Your score was not recorded."; 466 } 467 } 468 } else { 469 $scoreRecordedMessage = "Your score was not recorded because this problem has not been built for you."; 470 } 471 } 472 473 # logging student answers 474 475 my $answer_log = $self->{ce}->{courseFiles}->{logs}->{'answer_log'}; 476 if ( defined($answer_log )) { 477 if ($submitAnswers ) { 478 my $answerString = ""; 479 my %answerHash = %{ $pg->{answers} }; 480 $answerString = $answerString . $answerHash{$_}->{original_student_ans}."\t" 481 foreach (sort keys %answerHash); 482 $answerString = '' unless defined($answerString); # insure string is defined. 483 writeCourseLog($self->{ce}, "answer_log", 484 join("", 485 '|', $problem->user_id, 486 '|', $problem->set_id, 487 '|', $problem->problem_id, 488 '|',"\t", 489 time(),"\t", 490 $answerString, 491 ), 492 ); 493 494 } 495 } 496 497 $WeBWorK::timer0->continue("end answer processing") if $timer0_ON; 498 499 ##### output ##### 500 501 print CGI::start_div({class=>"problemHeader"}); 502 503 # custom message for editor 504 if ($permissionLevel >= 10 and defined $editMode) { 505 if ($editMode eq "temporaryFile") { 506 print CGI::p(CGI::i("Editing temporary file: ", $problem->source_file)); 507 } elsif ($editMode eq "savedFile") { 508 print CGI::p(CGI::i("Problem saved to: ", $problem->source_file)); 509 } 510 } 511 512 # attempt summary 513 if ($submitAnswers or $will{showCorrectAnswers}) { 514 # print this if user submitted answers OR requested correct answers 515 print $self->attemptResults($pg, $submitAnswers, 516 $will{showCorrectAnswers}, 517 $pg->{flags}->{showPartialCorrectAnswers}, 1, 1); 518 } elsif ($checkAnswers) { 519 # print this if user previewed answers 520 print $self->attemptResults($pg, 1, 0, 1, 1, 1); 521 # show attempt answers 522 # don't show correct answers 523 # show attempt results (correctness) 524 # don't show attempt previews 525 } elsif ($previewAnswers) { 526 # print this if user previewed answers 527 print $self->attemptResults($pg, 1, 0, 0, 0, 1); 528 # show attempt answers 529 # don't show correct answers 530 # don't show attempt results (correctness) 531 # show attempt previews 532 } 533 534 print CGI::end_div(); 535 536 print CGI::start_div({class=>"problem"}); 537 538 # main form 539 print 540 CGI::startform("POST", $r->uri), 541 $self->hidden_authen_fields, 542 CGI::p($pg->{body_text}), 543 CGI::p($pg->{result}->{msg} ? CGI::b("Note: ") : "", CGI::i($pg->{result}->{msg})), 544 CGI::p( 545 ($can{showCorrectAnswers} 546 ? CGI::checkbox( 547 -name => "showCorrectAnswers", 548 -checked => $will{showCorrectAnswers}, 549 -label => "Show correct answers", 550 ) . CGI::br() 551 : "" ), 552 ($can{recordAnswers} 553 ? CGI::submit(-name=>"submitAnswers", 554 -label=>"Submit Answers") 555 : ""), 556 ( ($can{checkAnswers} and not $can{recordAnswers}) 557 ? CGI::submit(-name=>"checkAnswers", 558 -label=>"Check Answers") 559 : ""), 560 CGI::submit(-name=>"previewAnswers", 561 -label=>"Preview Answers"), 562 ); 563 print CGI::end_div(); 564 565 print CGI::start_div({class=>"scoreSummary"}); 566 567 # score summary 568 my $attempts = $problem->num_correct + $problem->num_incorrect; 569 my $attemptsNoun = $attempts != 1 ? "times" : "time"; 570 my $lastScore = sprintf("%.0f%%", $problem->status * 100); # Round to whole number 571 my ($attemptsLeft, $attemptsLeftNoun); 572 if ($problem->max_attempts == -1) { 573 # unlimited attempts 574 $attemptsLeft = "unlimited"; 575 $attemptsLeftNoun = "attempts"; 576 } else { 577 $attemptsLeft = $problem->max_attempts - $attempts; 578 $attemptsLeftNoun = $attemptsLeft == 1 ? "attempt" : "attempts"; 579 } 580 581 my $setClosed = 0; 582 my $setClosedMessage; 583 if (time < $set->open_date or time > $set->due_date) { 584 $setClosed = 1; 585 $setClosedMessage = "This problem set is closed."; 586 if ($permissionLevel > 0) { 587 $setClosedMessage .= " However, since you are a privileged user, additional attempts will be recorded."; 588 } else { 589 $setClosedMessage .= " Additional attempts will not be recorded."; 590 } 591 } 592 print CGI::p( 593 $submitAnswers ? $scoreRecordedMessage . CGI::br() : "", 594 "You have attempted this problem $attempts $attemptsNoun.", CGI::br(), 595 $problem->attempted 596 ? "Your recorded score is $lastScore." . CGI::br() 597 : "", 598 $setClosed ? $setClosedMessage : "You have $attemptsLeft $attemptsLeftNoun remaining." 599 ); 600 print CGI::end_div(); 601 602 # save state for viewOptions 603 print CGI::hidden( 604 -name => "showOldAnswers", 605 -value => $will{showOldAnswers} 606 ), 607 CGI::hidden( 608 -name => "showCorrectAnswers", 609 -value => $will{showCorrectAnswers} 610 ), 611 CGI::hidden( 612 -name => "showHints", 613 -value => $will{showHints}), 614 CGI::hidden( 615 -name => "showSolutions", 616 -value => $will{showSolutions}, 617 ), 618 CGI::hidden( 619 -name => "displayMode", 620 -value => $self->{displayMode} 621 ); 622 623 # end of main form 624 print CGI::endform(); 625 626 # stuff we need below (pull these out at the beginning?) 627 my $ce = $self->{ce}; 628 my $root = $ce->{webworkURLs}->{root}; 629 my $courseName = $ce->{courseName}; 630 631 print CGI::start_div({class=>"problemFooter"}); 632 633 # arguments for answer inspection button 634 my $prof_url = $ce->{webworkURLs}->{oldProf}; 635 my $webworkURL = $ce->{webworkURLs}->{root}; 636 my $cgi_url = $prof_url; 637 $cgi_url=~ s|/[^/]*$||; # clip profLogin.pl 638 my $authen_args = $self->url_authen_args(); 639 my $showPastAnswersURL = "$webworkURL/$courseName/instructor/show_answers/"; 640 641 # print answer inspection button 642 if ($self->{permissionLevel} > 0) { 643 print "\n", 644 CGI::start_form(-method=>"POST",-action=>$showPastAnswersURL,-target=>"information"),"\n", 645 $self->hidden_authen_fields,"\n", 646 CGI::hidden(-name => 'course', -value=>$courseName), "\n", 647 CGI::hidden(-name => 'problemNumber', -value=>$problem->problem_id), "\n", 648 CGI::hidden(-name => 'setName', -value=>$problem->set_id), "\n", 649 CGI::hidden(-name => 'studentUser', -value=>$problem->user_id), "\n", 650 CGI::p( {-align=>"left"}, 651 CGI::submit(-name => 'action', -value=>'Show Past Answers') 652 ), "\n", 653 CGI::endform(); 654 } 655 656 #print CGI::end_div(); 657 # 658 #print CGI::start_div(); 659 660 # arguments for feedback form 661 my $feedbackURL = "$root/$courseName/feedback/"; 662 663 #print feedback form 664 print 665 CGI::start_form(-method=>"POST", -action=>$feedbackURL),"\n", 666 $self->hidden_authen_fields,"\n", 667 CGI::hidden("module", __PACKAGE__),"\n", 668 CGI::hidden("set", $set->set_id),"\n", 669 CGI::hidden("problem", $problem->problem_id),"\n", 670 CGI::hidden("displayMode", $self->{displayMode}),"\n", 671 CGI::hidden("showOldAnswers", $will{showOldAnswers}),"\n", 672 CGI::hidden("showCorrectAnswers", $will{showCorrectAnswers}),"\n", 673 CGI::hidden("showHints", $will{showHints}),"\n", 674 CGI::hidden("showSolutions", $will{showSolutions}),"\n", 675 CGI::p({-align=>"left"}, 676 CGI::submit(-name=>"feedbackForm", -label=>"Contact instructor") 677 ), 678 CGI::endform(),"\n"; 679 680 # FIXME print editor link 681 # print editor link if the user is an instructor AND the file is not in temporary editing mode 682 if ($self->{permissionLevel}>=10 and ( (not defined($self->{edit_mode})) or $self->{edit_mode} eq 'savedFile') ) { 683 print CGI::a({-href=>$ce->{webworkURLs}->{root}."/$courseName/instructor/pgProblemEditor/".$set->set_id. 684 '/'.$problem->problem_id.'?'.$self->url_authen_args},'Edit this problem'); 685 } 686 687 print CGI::end_div(); 688 689 # warning output 690 #if ($pg->{warnings} ne "") { 691 # print CGI::hr(), $self->warningOutput($pg->{warnings}); 692 #} 693 694 # debugging stuff 695 if (0) { 696 print 697 CGI::hr(), 698 CGI::h2("debugging information"), 699 CGI::h3("form fields"), 700 ref2string($self->{formFields}), 701 CGI::h3("user object"), 702 ref2string($self->{user}), 703 CGI::h3("set object"), 704 ref2string($set), 705 CGI::h3("problem object"), 706 ref2string($problem), 707 CGI::h3("PG object"), 708 ref2string($pg, {'WeBWorK::PG::Translator' => 1}); 709 } 710 711 return ""; 712 } 713 714 ##### output utilities ##### 715 716 sub attemptResults($$$$$$) { 717 my $self = shift; 718 my $pg = shift; 719 my $showAttemptAnswers = shift; 720 my $showCorrectAnswers = shift; 721 my $showAttemptResults = $showAttemptAnswers && shift; 722 my $showSummary = shift; 723 my $showAttemptPreview = shift || 0; 724 my $ce = $self->{ce}; 725 my $problemResult = $pg->{result}; # the overall result of the problem 726 my @answerNames = @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }; 727 728 my $showMessages = $showAttemptAnswers && grep { $pg->{answers}->{$_}->{ans_message} } @answerNames; 729 730 my $basename = "equation-" . $self->{set}->psvn. "." . $self->{problem}->problem_id . "-preview"; 731 my $imgGen = WeBWorK::PG::ImageGenerator->new( 732 tempDir => $ce->{webworkDirs}->{tmp}, 733 dir => $ce->{courseDirs}->{html_temp}, 734 url => $ce->{courseURLs}->{html_temp}, 735 basename => $basename, 736 latex => $ce->{externalPrograms}->{latex}, 737 dvipng => $ce->{externalPrograms}->{dvipng}, 738 ); 739 740 my $header; 741 #$header .= CGI::th("Part"); 742 $header .= $showAttemptAnswers ? CGI::th("Entered") : ""; 743 $header .= $showAttemptPreview ? CGI::th("Answer Preview") : ""; 744 $header .= $showCorrectAnswers ? CGI::th("Correct") : ""; 745 $header .= $showAttemptResults ? CGI::th("Result") : ""; 746 $header .= $showMessages ? CGI::th("messages") : ""; 747 my @tableRows = ( $header ); 748 my $numCorrect; 749 foreach my $name (@answerNames) { 750 my $answerResult = $pg->{answers}->{$name}; 751 my $studentAnswer = $answerResult->{student_ans}; # original_student_ans 752 my $preview = ($showAttemptPreview 753 ? $self->previewAnswer($answerResult, $imgGen) 754 : ""); 755 my $correctAnswer = $answerResult->{correct_ans}; 756 my $answerScore = $answerResult->{score}; 757 my $answerMessage = $showMessages ? $answerResult->{ans_message} : ""; 758 759 $numCorrect += $answerScore > 0; 760 my $resultString = $answerScore ? "correct" : "incorrect"; 761 762 # get rid of the goofy prefix on the answer names (supposedly, the format 763 # of the answer names is changeable. this only fixes it for "AnSwEr" 764 $name =~ s/^AnSwEr//; 765 766 my $row; 767 #$row .= CGI::td($name); 768 $row .= $showAttemptAnswers ? CGI::td(nbsp($studentAnswer)) : ""; 769 $row .= $showAttemptPreview ? CGI::td(nbsp($preview)) : ""; 770 $row .= $showCorrectAnswers ? CGI::td(nbsp($correctAnswer)) : ""; 771 $row .= $showAttemptResults ? CGI::td(nbsp($resultString)) : ""; 772 $row .= $answerMessage ? CGI::td(nbsp($answerMessage)) : ""; 773 push @tableRows, $row; 774 } 775 776 # render equation images 777 $imgGen->render(refresh => 1); 778 779 my $numIncorrectNoun = scalar @answerNames == 1 ? "question" : "questions"; 780 my $scorePercent = sprintf("%.0f%%", $problemResult->{score} * 100); 781 my $summary = "On this attempt, you answered $numCorrect out of " 782 . scalar @answerNames . " $numIncorrectNoun correct, for a score of $scorePercent."; 783 return CGI::table({-class=>"attemptResults"}, CGI::Tr(\@tableRows)) . ($showSummary ? CGI::p({class=>'emphasis'},$summary) : ""); 784 } 785 sub nbsp { 786 my $str = shift; 787 ($str =~/\S/) ? $str : ' ' ; # returns non-breaking space for empty strings 788 # tricky cases: $str =0; 789 # $str is a complex number 790 } 791 sub viewOptions($) { 792 my $self = shift; 793 my $displayMode = $self->{displayMode}; 794 my %must = %{ $self->{must} }; 795 my %can = %{ $self->{can} }; 796 my %will = %{ $self->{will} }; 797 798 my $optionLine; 799 $can{showOldAnswers} and $optionLine .= join "", 800 "Show: ".CGI::br(), 801 CGI::checkbox( 802 -name => "showOldAnswers", 803 -checked => $will{showOldAnswers}, 804 -label => "Saved answers", 805 ), " ".CGI::br(); 806 $can{showHints} and $optionLine .= join "", 807 CGI::checkbox( 808 -name => "showHints", 809 -checked => $will{showHints}, 810 -label => "Hints", 811 ), " ".CGI::br(); 812 $can{showSolutions} and $optionLine .= join "", 813 CGI::checkbox( 814 -name => "showSolutions", 815 -checked => $will{showSolutions}, 816 -label => "Solutions", 817 ), " ".CGI::br(); 818 $optionLine and $optionLine .= join "", CGI::br(); 819 820 return CGI::div({-style=>"border: thin groove; padding: 1ex; margin: 2ex align: left"}, 821 "View equations as: ".CGI::br(), 822 CGI::radio_group( 823 -name => "displayMode", 824 -values => ['plainText', 'formattedText', 'images'], 825 -default => $displayMode, 826 -linebreak=>'true', 827 -labels => { 828 plainText => "plain", 829 formattedText => "formatted", 830 images => "images", 831 } 832 ), CGI::br(),CGI::hr(), 833 $optionLine, 834 CGI::submit(-name=>"redisplay", -label=>"Save Options"), 835 ); 836 } 837 838 sub previewAnswer($$) { 839 my ($self, $answerResult, $imgGen) = @_; 840 my $ce = $self->{ce}; 841 my $effectiveUser = $self->{effectiveUser}; 842 my $set = $self->{set}; 843 my $problem = $self->{problem}; 844 my $displayMode = $self->{displayMode}; 845 846 # note: right now, we have to do things completely differently when we are 847 # rendering math from INSIDE the translator and from OUTSIDE the translator. 848 # so we'll just deal with each case explicitly here. there's some code 849 # duplication that can be dealt with later by abstracting out tth/dvipng/etc. 850 851 my $tex = $answerResult->{preview_latex_string}; 852 853 return "" unless defined $tex and $tex ne ""; 854 855 if ($displayMode eq "plainText") { 856 return $tex; 857 } elsif ($displayMode eq "formattedText") { 858 my $tthCommand = $ce->{externalPrograms}->{tth} 859 . " -L -f5 -r 2> /dev/null <<END_OF_INPUT; echo > /dev/null\n" 860 . "\\(".$tex."\\)\n" 861 . "END_OF_INPUT\n"; 862 863 # call tth 864 my $result = `$tthCommand`; 865 if ($?) { 866 return "<b>[tth failed: $? $@]</b>"; 867 } 868 return $result; 869 } elsif ($displayMode eq "images") { 870 ## how are we going to name this? 871 #my $targetPathCommon = "/m2i/" 872 # . $effectiveUser->user_id . "." 873 # . $set->set_id . "." 874 # . $problem->problem_id . "." 875 # . $answerResult->{ans_name} . ".png"; 876 # 877 ## figure out where to put things 878 #my $wd = makeTempDirectory($ce->{courseDirs}->{html_temp}, "webwork-dvipng"); 879 #my $latex = $ce->{externalPrograms}->{latex}; 880 #my $dvipng = $ce->{externalPrograms}->{dvipng}; 881 #my $targetPath = $ce->{courseDirs}->{html_temp} . $targetPathCommon; 882 # # should use surePathToTmpFile, but we have to 883 # # isolate it from the problem enivronment first 884 #my $targetURL = $ce->{courseURLs}->{html_temp} . $targetPathCommon; 885 # 886 ## call dvipng to generate a preview 887 #dvipng($wd, $latex, $dvipng, $tex, $targetPath); 888 #rmtree($wd, 0, 0); 889 #if (-e $targetPath) { 890 # return "<img src=\"$targetURL\" alt=\"$tex\" />"; 891 #} else { 892 # return "<b>[math2img failed]</b>"; 893 #} 894 $imgGen->add($answerResult->{preview_latex_string}); 895 896 } 897 } 898 899 ##### logging subroutine #### 900 901 902 903 ##### permission queries ##### 904 905 # this stuff should be abstracted out into the permissions system 906 # however, the permission system only knows about things in the 907 # course environment and the username. hmmm... 908 909 # also, i should fix these so that they have a consistent calling 910 # format -- perhaps: 911 # canPERM($courseEnv, $user, $set, $problem, $permissionLevel) 912 913 sub canShowCorrectAnswers($$) { 914 my ($permissionLevel, $answerDate) = @_; 915 return $permissionLevel > 0 || time > $answerDate; 916 } 917 918 sub canShowSolutions($$) { 919 my ($permissionLevel, $answerDate) = @_; 920 return canShowCorrectAnswers($permissionLevel, $answerDate); 921 } 922 923 sub canRecordAnswers($$$$$) { 924 my ($permissionLevel, $openDate, $dueDate, $maxAttempts, $attempts) = @_; 925 my $permHigh = $permissionLevel > 0; 926 my $timeOK = time >= $openDate && time <= $dueDate; 927 my $attemptsOK = $maxAttempts == -1 || $attempts <= $maxAttempts; 928 my $recordAnswers = $permHigh || ($timeOK && $attemptsOK); 929 return $recordAnswers; 930 } 931 932 sub canCheckAnswers($$) { 933 my ($permissionLevel, $answerDate) = @_; 934 my $permHigh = $permissionLevel > 0; 935 my $timeOK = time >= $answerDate; 936 my $recordAnswers = $permHigh || $timeOK; 937 return $recordAnswers; 938 } 939 940 sub mustRecordAnswers($) { 941 my ($permissionLevel) = @_; 942 return $permissionLevel == 0; 943 } 944 945 1;
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