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1 : sh002i 449 ################################################################################
2 : sh002i 1663 # WeBWorK Online Homework Delivery System
3 : sh002i 3973 # Copyright © 2000-2006 The WeBWorK Project, http://openwebwork.sf.net/
4 : sh002i 4504 # $CVSHeader: webwork2/lib/WeBWorK/ContentGenerator/Problem.pm,v 1.204 2006/08/22 18:37:22 dpvc Exp $
5 : sh002i 1663 #
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 : sh002i 449 ################################################################################
16 :    
17 : malsyned 353 package WeBWorK::ContentGenerator::Problem;
18 : sh002i 818 use base qw(WeBWorK::ContentGenerator);
19 : malsyned 396
20 : sh002i 455 =head1 NAME
21 : gage 1039
22 : sh002i 455 WeBWorK::ContentGenerator::Problem - Allow a student to interact with a problem.
23 :    
24 :     =cut
25 : sh002i 1536
26 : malsyned 396 use strict;
27 :     use warnings;
28 : gage 4235 #use CGI qw(-nosticky );
29 :     use WeBWorK::CGI;
30 : sh002i 919 use File::Path qw(rmtree);
31 : sh002i 3485 use WeBWorK::Debug;
32 : sh002i 455 use WeBWorK::Form;
33 :     use WeBWorK::PG;
34 : sh002i 1234 use WeBWorK::PG::ImageGenerator;
35 : sh002i 623 use WeBWorK::PG::IO;
36 : sh002i 4504 use WeBWorK::Utils qw(readFile writeLog writeCourseLog encodeAnswers decodeAnswers
37 :     ref2string makeTempDirectory path_is_subdir sortByName before after between);
38 : gage 997 use WeBWorK::DB::Utils qw(global2user user2global findDefaults);
39 : gage 3034 use URI::Escape;
40 : sh002i 1223
41 : jj 2415 use WeBWorK::Utils::Tasks qw(fake_set fake_problem);
42 : sh002i 1536
43 : sh002i 2505 ################################################################################
44 :     # CGI param interface to this module (up-to-date as of v1.153)
45 :     ################################################################################
46 :    
47 :     # Standard params:
48 : sh002i 449 #
49 : sh002i 2505 # user - user ID of real user
50 :     # key - session key
51 :     # effectiveUser - user ID of effective user
52 : sh002i 415 #
53 : sh002i 2505 # Integration with PGProblemEditor:
54 : sh002i 415 #
55 : sh002i 2505 # editMode - if set, indicates alternate problem source location.
56 :     # can be "temporaryFile" or "savedFile".
57 : sh002i 425 #
58 : sh002i 2505 # 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 : toenail 2398 #
63 : sh002i 2505 # 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 : gage 392
81 : sh002i 2505 ################################################################################
82 :     # "can" methods
83 :     ################################################################################
84 : malsyned 1426
85 : sh002i 2505 # Subroutines to determine if a user "can" perform an action. Each subroutine is
86 :     # called with the following arguments:
87 :     #
88 : sh002i 2762 # ($self, $User, $EffectiveUser, $Set, $Problem)
89 : sh002i 2505
90 : glarose 3377 # Note that significant parts of the "can" methods are lifted into the
91 :     # GatewayQuiz module. It isn't direct, however, because of the necessity
92 :     # of dealing with versioning there.
93 :    
94 : sh002i 2505 sub can_showOldAnswers {
95 : sh002i 2762 #my ($self, $User, $EffectiveUser, $Set, $Problem) = @_;
96 : sh002i 2505
97 :     return 1;
98 :     }
99 :    
100 :     sub can_showCorrectAnswers {
101 : sh002i 2762 my ($self, $User, $EffectiveUser, $Set, $Problem) = @_;
102 : sh002i 2505 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 : sh002i 2762 #my ($self, $User, $EffectiveUser, $Set, $Problem) = @_;
113 : sh002i 2505
114 :     return 1;
115 :     }
116 :    
117 :     sub can_showSolutions {
118 : sh002i 2762 my ($self, $User, $EffectiveUser, $Set, $Problem) = @_;
119 : sh002i 2505 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 : sh002i 2762 my ($self, $User, $EffectiveUser, $Set, $Problem, $submitAnswers) = @_;
130 : sh002i 2505 my $authz = $self->r->authz;
131 : jj 2685 my $thisAttempt = $submitAnswers ? 1 : 0;
132 : sh002i 2505 if ($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 : jj 2685 my $attempts_used = $Problem->num_correct + $Problem->num_incorrect + $thisAttempt;
140 : sh002i 2505 if ($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 : sh002i 2512 } elsif (between($Set->due_date, $Set->answer_date)) {
146 : sh002i 2505 return $authz->hasPermissions($User->user_id, "record_answers_after_due_date");
147 : sh002i 2512 } elsif (after($Set->answer_date)) {
148 : sh002i 2505 return $authz->hasPermissions($User->user_id, "record_answers_after_answer_date");
149 :     }
150 :     }
151 :    
152 :     sub can_checkAnswers {
153 : sh002i 2762 my ($self, $User, $EffectiveUser, $Set, $Problem, $submitAnswers) = @_;
154 : sh002i 2505 my $authz = $self->r->authz;
155 : jj 2685 my $thisAttempt = $submitAnswers ? 1 : 0;
156 : sh002i 2505
157 :     if (before($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 : jj 2685 my $attempts_used = $Problem->num_correct + $Problem->num_incorrect + $thisAttempt;
162 : sh002i 2505 if ($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 : sh002i 2512 } elsif (between($Set->due_date, $Set->answer_date)) {
168 : sh002i 2505 return $authz->hasPermissions($User->user_id, "check_answers_after_due_date");
169 : sh002i 2512 } elsif (after($Set->answer_date)) {
170 : sh002i 2505 return $authz->hasPermissions($User->user_id, "check_answers_after_answer_date");
171 :     }
172 :     }
173 :    
174 : jj 3564 # Reset the default in some cases
175 :     sub set_showOldAnswers_default {
176 :     my ($self, $ce, $userName, $authz, $set) = @_;
177 : jj 3580 # 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 : jj 3564 # 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 : dpvc 3567 $ce->{pg}->{options}->{showOldAnswers} = 0 if $set->{due_date} && after($set->{due_date});
185 : jj 3564 }
186 :    
187 : sh002i 2505 ################################################################################
188 :     # output utilities
189 :     ################################################################################
190 :    
191 : glarose 3377 # Note: the substance of attemptResults is lifted into GatewayQuiz.pm,
192 :     # with some changes to the output format
193 :    
194 : sh002i 2505 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 : sh002i 2761 my $fully = '';
235 : sh002i 2505 my @tableRows = ( $header );
236 :     my $numCorrect = 0;
237 : gage 3391 my $numBlanks =0;
238 : sh002i 3356 my $tthPreambleCache;
239 : sh002i 2505 foreach my $name (@answerNames) {
240 :     my $answerResult = $pg->{answers}->{$name};
241 :     my $studentAnswer = $answerResult->{student_ans}; # original_student_ans
242 :     my $preview = ($showAttemptPreview
243 : sh002i 3356 ? $self->previewAnswer($answerResult, $imgGen, \$tthPreambleCache)
244 : sh002i 2505 : "");
245 :     my $correctAnswer = $answerResult->{correct_ans};
246 :     my $answerScore = $answerResult->{score};
247 :     my $answerMessage = $showMessages ? $answerResult->{ans_message} : "";
248 : sh002i 2767 $answerMessage =~ s/\n/<BR>/g;
249 : sh002i 2761 $numCorrect += $answerScore >= 1;
250 : dpvc 3653 $numBlanks++ unless $studentAnswer =~/\S/ || $answerScore >= 1; # unless student answer contains entry
251 : sh002i 2761 my $resultString = $answerScore >= 1 ? "correct" :
252 :     $answerScore > 0 ? int($answerScore*100)."% correct" :
253 :     "incorrect";
254 :     $fully = 'completely ' if $answerScore >0 and $answerScore < 1;
255 : sh002i 2505
256 :     # get rid of the goofy prefix on the answer names (supposedly, the format
257 :     # of the answer names is changeable. this only fixes it for "AnSwEr"
258 :     #$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 : sh002i 2767 $row .= $showMessages ? CGI::td({-class=>"Message"},$self->nbsp($answerMessage)) : "";
267 : sh002i 2505 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 $summary = "";
279 : gage 3391 unless (defined($problemResult->{summary}) and $problemResult->{summary} =~ /\S/) {
280 :     if (scalar @answerNames == 1) { #default messages
281 :     if ($numCorrect == scalar @answerNames) {
282 : dpvc 4158 $summary .= CGI::div({class=>"ResultsWithoutError"},"The answer above is correct.");
283 : gage 3391 } else {
284 : dpvc 4158 $summary .= CGI::div({class=>"ResultsWithError"},"The answer above is NOT ${fully}correct.");
285 : gage 3391 }
286 :     } else {
287 :     if ($numCorrect == scalar @answerNames) {
288 : dpvc 4158 $summary .= CGI::div({class=>"ResultsWithoutError"},"All of the answers above are correct.");
289 : gage 3391 }
290 :     unless ($numCorrect + $numBlanks == scalar( @answerNames)) {
291 : dpvc 4158 $summary .= CGI::div({class=>"ResultsWithError"},"At least one of the answers above is NOT ${fully}correct.");
292 : gage 3391 }
293 :     if ($numBlanks) {
294 :     my $s = ($numBlanks>1)?'':'s';
295 :     $summary .= CGI::div({class=>"ResultsAlert"},"$numBlanks of the questions remain$s unanswered.");
296 :     }
297 :     }
298 : sh002i 2505 } else {
299 : gage 3391 $summary = $problemResult->{summary}; # summary has been defined by grader
300 : sh002i 2505 }
301 :     return
302 :     CGI::table({-class=>"attemptResults"}, CGI::Tr(\@tableRows))
303 : sh002i 3768 . ($showSummary ? CGI::p({class=>'attemptResultsSummary'},$summary) : "");
304 : sh002i 2505 }
305 :    
306 :    
307 : glarose 3377 # Note: previewAnswer is lifted into GatewayQuiz.pm
308 :    
309 : sh002i 2505 sub previewAnswer {
310 : sh002i 3356 my ($self, $answerResult, $imgGen, $tthPreambleCache) = @_;
311 : sh002i 2505 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 : sh002i 3356
330 :     # read the TTH preamble, or use the cached copy passed in from the caller
331 : glarose 3570 my $tthPreamble='';
332 : sh002i 3356 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 : sh002i 2505 my $tthCommand = $ce->{externalPrograms}->{tth}
351 : dpvc 3362 . " -L -f5 -u -r 2> /dev/null <<END_OF_INPUT; echo > /dev/null\n"
352 :     . $tthPreamble . "\\[" . $tex . "\\]\n"
353 : sh002i 2505 . "END_OF_INPUT\n";
354 :    
355 :     # call tth
356 :     my $result = `$tthCommand`;
357 :     if ($?) {
358 :     return "<b>[tth failed: $? $@]</b>";
359 :     } else {
360 : dpvc 3362 # 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 : sh002i 2505 return $result;
364 :     }
365 : sh002i 3356
366 : sh002i 2505 } elsif ($displayMode eq "images") {
367 :     $imgGen->add($tex);
368 :     } elsif ($displayMode eq "jsMath") {
369 : dpvc 4071 $tex =~ s/</&lt;/g; $tex =~ s/>/&gt;/g;
370 : dpvc 3337 return '<SPAN CLASS="math">\\displaystyle{'.$tex.'}</SPAN>';
371 : sh002i 2505 }
372 :     }
373 :    
374 :     ################################################################################
375 :     # Template escape implementations
376 :     ################################################################################
377 :    
378 : sh002i 476 sub pre_header_initialize {
379 : sh002i 1841 my ($self) = @_;
380 : sh002i 1908 my $r = $self->r;
381 :     my $ce = $r->ce;
382 :     my $db = $r->db;
383 : toenail 2349 my $authz = $r->authz;
384 : sh002i 1908 my $urlpath = $r->urlpath;
385 :    
386 :     my $setName = $urlpath->arg("setID");
387 : sh002i 1841 my $problemNumber = $r->urlpath->arg("problemID");
388 : sh002i 1908 my $userName = $r->param('user');
389 :     my $effectiveUserName = $r->param('effectiveUser');
390 :     my $key = $r->param('key');
391 : sh002i 3816 my $editMode = $r->param("editMode");
392 : gage 1007
393 : sh002i 1636 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 : sh002i 1197 # obtain the merged set for $effectiveUser
402 : sh002i 1636 my $set = $db->getMergedSet($effectiveUserName, $setName); # checked
403 : sh002i 2738
404 : jj 3564 $self->set_showOldAnswers_default($ce, $userName, $authz, $set);
405 :    
406 : glarose 3377 # gateway check here: we want to be sure that someone isn't trying to take
407 :     # a GatewayQuiz through the regular problem/homework mechanism, thereby
408 :     # circumventing the versioning, time limits, etc.
409 : sh002i 3816 if (defined $set and defined $set->assignment_type and $set->assignment_type() =~ /gateway/) {
410 :     unless ($editMode eq "temporaryFile" and $authz->hasPermissions($userName, "modify_student_data")) {
411 :     die('Invalid access attempt: the Problem ContentGenerator was called for a GatewayQuiz assignment.' );
412 :     }
413 :     }
414 : glarose 3377
415 : sh002i 2738 # Database fix (in case of undefined published values)
416 :     # this is only necessary because some people keep holding to ww1.9 which did not have a published field
417 :     # make sure published is set to 0 or 1
418 :     if ( $set and $set->published ne "0" and $set->published ne "1") {
419 :     my $globalSet = $db->getGlobalSet($set->set_id);
420 :     $globalSet->published("1"); # defaults to published
421 :     $db->putGlobalSet($globalSet);
422 :     $set = $db->getMergedSet($effectiveUserName, $setName);
423 :     } else {
424 :     # don't do anything just yet, maybe we're a professor and we're
425 :     # fabricating a set or haven't assigned it to ourselves just yet
426 :     }
427 : gage 992
428 : sh002i 1197 # obtain the merged problem for $effectiveUser
429 : sh002i 1636 my $problem = $db->getMergedProblem($effectiveUserName, $setName, $problemNumber); # checked
430 : toenail 2097
431 : toenail 2349 if ($authz->hasPermissions($userName, "modify_problem_sets")) {
432 : sh002i 1197 # professors are allowed to fabricate sets and problems not
433 :     # assigned to them (or anyone). this allows them to use the
434 :     # editor to
435 : sh002i 2738
436 :     # if a User Set does not exist for this user and this set
437 :     # then we check the Global Set
438 :     # if that does not exist we create a fake set
439 :     # if it does, we add fake user data
440 : sh002i 1197 unless (defined $set) {
441 :     my $userSetClass = $db->{set_user}->{record};
442 : sh002i 1636 my $globalSet = $db->getGlobalSet($setName); # checked
443 : sh002i 2738
444 :     if (not defined $globalSet) {
445 : jj 2020 $set = fake_set($db);
446 :     } else {
447 :     $set = global2user($userSetClass, $globalSet);
448 :     $set->psvn(0);
449 :     }
450 : sh002i 1197 }
451 :    
452 :     # if that is not yet defined obtain the global problem,
453 :     # convert it to a user problem, and add fake user data
454 :     unless (defined $problem) {
455 :     my $userProblemClass = $db->{problem_user}->{record};
456 : sh002i 1636 my $globalProblem = $db->getGlobalProblem($setName, $problemNumber); # checked
457 :     # if the global problem doesn't exist either, bail!
458 : jj 2020 if(not defined $globalProblem) {
459 :     my $sourceFilePath = $r->param("sourceFilePath");
460 : sh002i 4051 die "sourceFilePath is unsafe!" unless path_is_subdir($sourceFilePath, $ce->{courseDirs}->{templates}, 1); # 1==path can be relative to dir
461 : jj 2421 # These are problems from setmaker. If declared invalid, they won't come up
462 : jj 2422 $self->{invalidProblem} = $self->{invalidSet} = 1 unless defined $sourceFilePath;
463 : toenail 2398 # die "Problem $problemNumber in set $setName does not exist" unless defined $sourceFilePath;
464 : jj 2020 $problem = fake_problem($db);
465 :     $problem->problem_id(1);
466 :     $problem->source_file($sourceFilePath);
467 :     $problem->user_id($effectiveUserName);
468 :     } else {
469 :     $problem = global2user($userProblemClass, $globalProblem);
470 :     $problem->user_id($effectiveUserName);
471 :     $problem->problem_seed(0);
472 :     $problem->status(0);
473 :     $problem->attempted(0);
474 :     $problem->last_answer("");
475 :     $problem->num_correct(0);
476 :     $problem->num_incorrect(0);
477 :     }
478 : sh002i 1197 }
479 :    
480 :     # now we're sure we have valid UserSet and UserProblem objects
481 :     # yay!
482 :    
483 :     # now deal with possible editor overrides:
484 :    
485 :     # if the caller is asking to override the source file, and
486 :     # editMode calls for a temporary file, do so
487 :     my $sourceFilePath = $r->param("sourceFilePath");
488 : sh002i 4015 if (defined $editMode and $editMode eq "temporaryFile" and defined $sourceFilePath) {
489 : sh002i 4051 die "sourceFilePath is unsafe!" unless path_is_subdir($sourceFilePath, $ce->{courseDirs}->{templates}, 1); # 1==path can be relative to dir
490 : sh002i 1197 $problem->source_file($sourceFilePath);
491 :     }
492 :    
493 : toenail 2398 # if the problem does not have a source file or no source file has been passed in
494 :     # then this is really an invalid problem (probably from a bad URL)
495 :     $self->{invalidProblem} = not (defined $sourceFilePath or $problem->source_file);
496 :    
497 : sh002i 1197 # if the caller is asking to override the problem seed, do so
498 :     my $problemSeed = $r->param("problemSeed");
499 :     if (defined $problemSeed) {
500 :     $problem->problem_seed($problemSeed);
501 :     }
502 : toenail 2097
503 : toenail 2244 my $publishedClass = ($set->published) ? "Published" : "Unpublished";
504 : toenail 2278 my $publishedText = ($set->published) ? "visible to students." : "hidden from students.";
505 : toenail 2244 $self->addmessage(CGI::p("This set is " . CGI::font({class=>$publishedClass}, $publishedText)));
506 : glarose 3377
507 :     # test for additional set validity if it's not already invalid
508 :     } else {
509 : toenail 2097 # A set is valid if it exists and if it is either published or the user is privileged.
510 : sh002i 2738 $self->{invalidSet} = !(defined $set and ($set->published || $authz->hasPermissions($userName, "view_unpublished_sets")));
511 :     $self->{invalidProblem} = !(defined $problem and ($set->published || $authz->hasPermissions($userName, "view_unpublished_sets")));
512 :    
513 : toenail 2398 $self->addbadmessage(CGI::p("This problem will not count towards your grade.")) if $problem and not $problem->value and not $self->{invalidProblem};
514 : sh002i 1197 }
515 : toenail 2398
516 : sh002i 1197 $self->{userName} = $userName;
517 :     $self->{effectiveUserName} = $effectiveUserName;
518 :     $self->{user} = $user;
519 :     $self->{effectiveUser} = $effectiveUser;
520 :     $self->{set} = $set;
521 :     $self->{problem} = $problem;
522 :     $self->{editMode} = $editMode;
523 : sh002i 429
524 :     ##### form processing #####
525 :    
526 : sh002i 425 # set options from form fields (see comment at top of file for names)
527 : sh002i 1908 my $displayMode = $r->param("displayMode") || $ce->{pg}->{options}->{displayMode};
528 : sh002i 425 my $redisplay = $r->param("redisplay");
529 : sh002i 429 my $submitAnswers = $r->param("submitAnswers");
530 : sh002i 719 my $checkAnswers = $r->param("checkAnswers");
531 : sh002i 623 my $previewAnswers = $r->param("previewAnswers");
532 : gage 388
533 : sh002i 449 my $formFields = { WeBWorK::Form->new_from_paramable($r)->Vars };
534 :    
535 : sh002i 738 $self->{displayMode} = $displayMode;
536 :     $self->{redisplay} = $redisplay;
537 :     $self->{submitAnswers} = $submitAnswers;
538 :     $self->{checkAnswers} = $checkAnswers;
539 :     $self->{previewAnswers} = $previewAnswers;
540 :     $self->{formFields} = $formFields;
541 : toenail 2011
542 : toenail 2093 # get result and send to message
543 : gage 3034 my $status_message = $r->param("status_message");
544 : gage 3055 $self->addmessage(CGI::p("$status_message")) if $status_message;
545 : toenail 2093
546 : toenail 2011 # now that we've set all the necessary variables quit out if the set or problem is invalid
547 :     return if $self->{invalidSet} || $self->{invalidProblem};
548 : sh002i 738
549 : sh002i 449 ##### permissions #####
550 :    
551 : sh002i 738 # are we allowed to view this problem?
552 : sh002i 2505 $self->{isOpen} = after($set->open_date) || $authz->hasPermissions($userName, "view_unopened_sets");
553 : sh002i 738 return unless $self->{isOpen};
554 :    
555 : sh002i 449 # what does the user want to do?
556 : gage 2998 #FIXME There is a problem with checkboxes -- if they are not checked they are invisible. Hence if the default mode in $ce is 1
557 :     # there is no way to override this. Probably this is ok for the last three options, but it was definitely not ok for showing
558 :     # saved answers which is normally on, but you want to be able to turn it off! This section should be moved to ContentGenerator
559 :     # so that you can set these options anywhere. We also need mechanisms for making them sticky.
560 : jj 3564 # Note: ProblemSet and ProblemSets might set showOldAnswers to '', which
561 :     # needs to be treated as if it is not set.
562 : sh002i 431 my %want = (
563 : jj 3564 showOldAnswers => (defined($r->param("showOldAnswers")) and $r->param("showOldAnswers") ne '') ? $r->param("showOldAnswers") : $ce->{pg}->{options}->{showOldAnswers},
564 : sh002i 1908 showCorrectAnswers => $r->param("showCorrectAnswers") || $ce->{pg}->{options}->{showCorrectAnswers},
565 :     showHints => $r->param("showHints") || $ce->{pg}->{options}->{showHints},
566 :     showSolutions => $r->param("showSolutions") || $ce->{pg}->{options}->{showSolutions},
567 : sh002i 719 recordAnswers => $submitAnswers,
568 : sh002i 747 checkAnswers => $checkAnswers,
569 : jj 2685 getSubmitButton => 1,
570 : sh002i 431 );
571 : sh002i 429
572 : sh002i 431 # are certain options enforced?
573 :     my %must = (
574 :     showOldAnswers => 0,
575 :     showCorrectAnswers => 0,
576 :     showHints => 0,
577 :     showSolutions => 0,
578 : sh002i 2505 recordAnswers => ! $authz->hasPermissions($userName, "avoid_recording_answers"),
579 : sh002i 747 checkAnswers => 0,
580 : jj 2685 getSubmitButton => 0,
581 : sh002i 431 );
582 : gage 3000
583 : sh002i 429 # does the user have permission to use certain options?
584 : sh002i 2762 my @args = ($user, $effectiveUser, $set, $problem);
585 : sh002i 431 my %can = (
586 : sh002i 2505 showOldAnswers => $self->can_showOldAnswers(@args),
587 :     showCorrectAnswers => $self->can_showCorrectAnswers(@args),
588 :     showHints => $self->can_showHints(@args),
589 :     showSolutions => $self->can_showSolutions(@args),
590 : jj 2685 recordAnswers => $self->can_recordAnswers(@args, 0),
591 :     checkAnswers => $self->can_checkAnswers(@args, $submitAnswers),
592 :     getSubmitButton => $self->can_recordAnswers(@args, $submitAnswers),
593 : sh002i 431 );
594 : sh002i 1908
595 : sh002i 429 # final values for options
596 : sh002i 431 my %will;
597 : sh002i 617 foreach (keys %must) {
598 : sh002i 431 $will{$_} = $can{$_} && ($want{$_} || $must{$_});
599 :     }
600 : sh002i 429
601 :     ##### sticky answers #####
602 :    
603 : sh002i 1234 if (not ($submitAnswers or $previewAnswers or $checkAnswers) and $will{showOldAnswers}) {
604 : sh002i 431 # do this only if new answers are NOT being submitted
605 : sh002i 429 my %oldAnswers = decodeAnswers($problem->last_answer);
606 :     $formFields->{$_} = $oldAnswers{$_} foreach keys %oldAnswers;
607 :     }
608 :    
609 :     ##### translation #####
610 : gage 1202
611 : sh002i 3485 debug("begin pg processing");
612 : sh002i 424 my $pg = WeBWorK::PG->new(
613 : sh002i 1908 $ce,
614 : malsyned 704 $effectiveUser,
615 : gage 1038 $key,
616 : sh002i 502 $set,
617 :     $problem,
618 : sh002i 1197 $set->psvn, # FIXME: this field should be removed
619 : sh002i 502 $formFields,
620 : sh002i 424 { # translation options
621 : sh002i 434 displayMode => $displayMode,
622 :     showHints => $will{showHints},
623 :     showSolutions => $will{showSolutions},
624 :     refreshMath2img => $will{showHints} || $will{showSolutions},
625 : sh002i 684 processAnswers => 1,
626 : sh002i 424 },
627 :     );
628 : gage 392
629 : sh002i 3485 debug("end pg processing");
630 : sh002i 2505
631 : sh002i 684 ##### fix hint/solution options #####
632 :    
633 : gage 1582 $can{showHints} &&= $pg->{flags}->{hintExists}
634 :     &&= $pg->{flags}->{showHintLimit}<=$pg->{state}->{num_of_incorrect_ans};
635 : sh002i 684 $can{showSolutions} &&= $pg->{flags}->{solutionExists};
636 :    
637 : sh002i 449 ##### store fields #####
638 :    
639 :     $self->{want} = \%want;
640 :     $self->{must} = \%must;
641 :     $self->{can} = \%can;
642 :     $self->{will} = \%will;
643 :     $self->{pg} = $pg;
644 :     }
645 :    
646 : sh002i 558 sub if_errors($$) {
647 :     my ($self, $arg) = @_;
648 : sh002i 1908
649 :     if ($self->{isOpen}) {
650 :     return $self->{pg}->{flags}->{error_flag} ? $arg : !$arg;
651 :     } else {
652 :     return !$arg;
653 :     }
654 : sh002i 558 }
655 :    
656 : sh002i 562 sub head {
657 : sh002i 1908 my ($self) = @_;
658 :    
659 : sh002i 738 return "" unless $self->{isOpen};
660 : sh002i 555 return $self->{pg}->{head_text} if $self->{pg}->{head_text};
661 :     }
662 : sh002i 476
663 : sh002i 3481 sub options {
664 :     my ($self) = @_;
665 :     #warn "doing options in Problem";
666 :    
667 :     # don't show options if we don't have anything to show
668 : sh002i 3798 return "" if $self->{invalidSet} or $self->{invalidProblem};
669 :     return "" unless $self->{isOpen};
670 : sh002i 3481
671 :     my $displayMode = $self->{displayMode};
672 :     my %can = %{ $self->{can} };
673 :    
674 :     my @options_to_show = "displayMode";
675 :     push @options_to_show, "showOldAnswers" if $can{showOldAnswers};
676 :     push @options_to_show, "showHints" if $can{showHints};
677 :     push @options_to_show, "showSolutions" if $can{showSolutions};
678 :    
679 :     return $self->optionsMacro(
680 :     options_to_show => \@options_to_show,
681 :     extra_params => ["editMode", "sourceFilePath"],
682 :     );
683 :     }
684 : sh002i 1131
685 : sh002i 476 sub siblings {
686 : sh002i 1908 my ($self) = @_;
687 :     my $r = $self->r;
688 :     my $db = $r->db;
689 :     my $urlpath = $r->urlpath;
690 : sh002i 476
691 : toenail 2011 # can't show sibling problems if the set is invalid
692 :     return "" if $self->{invalidSet};
693 :    
694 : sh002i 1908 my $courseID = $urlpath->arg("courseID");
695 :     my $setID = $self->{set}->set_id;
696 :     my $eUserID = $r->param("effectiveUser");
697 :     my @problemIDs = sort { $a <=> $b } $db->listUserProblems($eUserID, $setID);
698 : sh002i 526
699 : sh002i 3963 print CGI::start_div({class=>"info-box", id=>"fisheye"});
700 :     print CGI::h2("Problems");
701 : sh002i 3836 #print CGI::start_ul({class=>"LinksMenu"});
702 :     #print CGI::start_li();
703 :     #print CGI::span({style=>"font-size:larger"}, "Problems");
704 : sh002i 1908 print CGI::start_ul();
705 : toenail 2211
706 : sh002i 1908 foreach my $problemID (@problemIDs) {
707 :     my $problemPage = $urlpath->newFromModule("WeBWorK::ContentGenerator::Problem",
708 :     courseID => $courseID, setID => $setID, problemID => $problemID);
709 : gage 2998 print CGI::li(CGI::a( {href=>$self->systemLink($problemPage,
710 :     params=>{ displayMode => $self->{displayMode},
711 : gage 3000 showOldAnswers => $self->{will}->{showOldAnswers}
712 : gage 2998 })}, "Problem $problemID")
713 :     );
714 : sh002i 476 }
715 : sh002i 1908
716 :     print CGI::end_ul();
717 : sh002i 3836 #print CGI::end_li();
718 :     #print CGI::end_ul();
719 : sh002i 3963 print CGI::end_div();
720 : sh002i 1908
721 : sh002i 1223 return "";
722 : sh002i 476 }
723 :    
724 :     sub nav {
725 : sh002i 1908 my ($self, $args) = @_;
726 :     my $r = $self->r;
727 :     my $db = $r->db;
728 :     my $urlpath = $r->urlpath;
729 : sh002i 476
730 : sh002i 1908 my $courseID = $urlpath->arg("courseID");
731 : toenail 2011 my $setID = $self->{set}->set_id if !($self->{invalidSet});
732 :     my $problemID = $self->{problem}->problem_id if !($self->{invalidProblem});
733 : sh002i 1908 my $eUserID = $r->param("effectiveUser");
734 : sh002i 476
735 : sh002i 1908 my ($prevID, $nextID);
736 : toenail 2011
737 :     if (!$self->{invalidProblem}) {
738 :     my @problemIDs = $db->listUserProblems($eUserID, $setID);
739 :     foreach my $id (@problemIDs) {
740 :     $prevID = $id if $id < $problemID
741 :     and (not defined $prevID or $id > $prevID);
742 :     $nextID = $id if $id > $problemID
743 :     and (not defined $nextID or $id < $nextID);
744 :     }
745 : sh002i 1223 }
746 : jj 2020
747 : sh002i 1908 my @links;
748 : jj 2020
749 : sh002i 1908 if ($prevID) {
750 :     my $prevPage = $urlpath->newFromModule(__PACKAGE__,
751 :     courseID => $courseID, setID => $setID, problemID => $prevID);
752 :     push @links, "Previous Problem", $r->location . $prevPage->path, "navPrev";
753 :     } else {
754 :     push @links, "Previous Problem", "", "navPrev";
755 :     }
756 : jj 2020
757 : sh002i 1908 push @links, "Problem List", $r->location . $urlpath->parent->path, "navProbList";
758 : jj 2020
759 : sh002i 1908 if ($nextID) {
760 :     my $nextPage = $urlpath->newFromModule(__PACKAGE__,
761 :     courseID => $courseID, setID => $setID, problemID => $nextID);
762 :     push @links, "Next Problem", $r->location . $nextPage->path, "navNext";
763 :     } else {
764 :     push @links, "Next Problem", "", "navNext";
765 :     }
766 : jj 2020
767 : sh002i 3798 my $tail = "";
768 :    
769 :     $tail .= "&displayMode=".$self->{displayMode} if defined $self->{displayMode};
770 :     $tail .= "&showOldAnswers=".$self->{will}->{showOldAnswers}
771 :     if defined $self->{will}->{showOldAnswers};
772 : sh002i 1908 return $self->navMacro($args, $tail, @links);
773 : sh002i 476 }
774 :    
775 : sh002i 449 sub title {
776 : sh002i 1908 my ($self) = @_;
777 : toenail 2011
778 :     # using the url arguments won't break if the set/problem are invalid
779 : jj 3533 my $setID = WeBWorK::ContentGenerator::underscore2nbsp($self->r->urlpath->arg("setID"));
780 : toenail 2011 my $problemID = $self->r->urlpath->arg("problemID");
781 : sh002i 476
782 : sh002i 2767 return "$setID: Problem $problemID";
783 : sh002i 449 }
784 :    
785 :     sub body {
786 :     my $self = shift;
787 : sh002i 1908 my $r = $self->r;
788 :     my $ce = $r->ce;
789 :     my $db = $r->db;
790 : toenail 2349 my $authz = $r->authz;
791 : sh002i 1908 my $urlpath = $r->urlpath;
792 : toenail 2349 my $user = $r->param('user');
793 : sh002i 2507 my $effectiveUser = $r->param('effectiveUser');
794 : toenail 2011
795 :     if ($self->{invalidSet}) {
796 :     return CGI::div({class=>"ResultsWithError"},
797 : sh002i 3357 CGI::p("The selected homework set (" . $urlpath->arg("setID") . ") is not a valid set for " . $r->param("effectiveUser") . "."));
798 : toenail 2011 }
799 : sh002i 449
800 : toenail 2011 if ($self->{invalidProblem}) {
801 :     return CGI::div({class=>"ResultsWithError"},
802 :     CGI::p("The selected problem (" . $urlpath->arg("problemID") . ") is not a valid problem for set " . $self->{set}->set_id . "."));
803 :     }
804 :    
805 : sh002i 1908 unless ($self->{isOpen}) {
806 :     return CGI::div({class=>"ResultsWithError"},
807 : sh002i 3357 CGI::p("This problem is not available because the homework set that contains it is not yet open."));
808 : sh002i 1908 }
809 : sh002i 449 # unpack some useful variables
810 : sh002i 476 my $set = $self->{set};
811 :     my $problem = $self->{problem};
812 : sh002i 1197 my $editMode = $self->{editMode};
813 : sh002i 476 my $submitAnswers = $self->{submitAnswers};
814 : sh002i 719 my $checkAnswers = $self->{checkAnswers};
815 : sh002i 623 my $previewAnswers = $self->{previewAnswers};
816 : sh002i 719 my %want = %{ $self->{want} };
817 : sh002i 1197 my %can = %{ $self->{can} };
818 : sh002i 719 my %must = %{ $self->{must} };
819 : sh002i 476 my %will = %{ $self->{will} };
820 :     my $pg = $self->{pg};
821 : sh002i 449
822 : sh002i 1908 my $courseName = $urlpath->arg("courseID");
823 : gage 1592
824 : sh002i 2505 # 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 : sh002i 1908 my $editorLink = "";
828 : dpvc 4158 # if we are here without a real homework set, carry that through
829 : jj 2020 my $forced_field = [];
830 :     $forced_field = ['sourceFilePath' => $r->param("sourceFilePath")] if
831 :     ($set->set_id eq 'Undefined_Set');
832 : toenail 2398 if ($authz->hasPermissions($user, "modify_problem_sets")) {
833 : sh002i 1908 my $editorPage = $urlpath->newFromModule("WeBWorK::ContentGenerator::Instructor::PGProblemEditor",
834 :     courseID => $courseName, setID => $set->set_id, problemID => $problem->problem_id);
835 : jj 2020 my $editorURL = $self->systemLink($editorPage, params=>$forced_field);
836 : gage 3888 $editorLink = CGI::p(CGI::a({href=>$editorURL,target =>'WW_Editor'}, "Edit this problem"));
837 : gage 1592 }
838 : sh002i 1908
839 : sh002i 449 ##### translation errors? #####
840 : gage 2861
841 : sh002i 425 if ($pg->{flags}->{error_flag}) {
842 : sh002i 3795 if ($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 : sh002i 1908 print $editorLink;
848 :     return "";
849 : sh002i 425 }
850 : sh002i 415
851 : sh002i 429 ##### answer processing #####
852 : sh002i 3485 debug("begin answer processing");
853 : sh002i 429 # if answers were submitted:
854 : sh002i 1227 my $scoreRecordedMessage;
855 : jjholt 2156 my $pureProblem;
856 : sh002i 429 if ($submitAnswers) {
857 : sh002i 818 # get a "pure" (unmerged) UserProblem to modify
858 : gage 1007 # this will be undefined if the problem has not been assigned to this user
859 : jjholt 2156 $pureProblem = $db->getUserProblem($problem->user_id, $problem->set_id, $problem->problem_id); # checked
860 : sh002i 1227 if (defined $pureProblem) {
861 :     # store answers in DB for sticky answers
862 :     my %answersToStore;
863 :     my %answerHash = %{ $pg->{answers} };
864 : gage 1539 $answersToStore{$_} = $self->{formFields}->{$_} #$answerHash{$_}->{original_student_ans} -- this may have been modified for fields with multiple values. Don't use it!!
865 : sh002i 1227 foreach (keys %answerHash);
866 : sh002i 1908
867 : gage 1507 # 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 : gage 1539 $answersToStore{$_} = $self->{formFields}->{$_} foreach (@extra_answer_names);
872 : gage 1507
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 : sh002i 1227 my $answerString = encodeAnswers(%answersToStore,
876 : gage 1507 @answer_order);
877 : sh002i 1227
878 :     # store last answer to database
879 :     $problem->last_answer($answerString);
880 : gage 1007 $pureProblem->last_answer($answerString);
881 :     $db->putUserProblem($pureProblem);
882 : sh002i 1227
883 : gage 1007 # store state in DB if it makes sense
884 :     if ($will{recordAnswers}) {
885 :     $problem->status($pg->{state}->{recorded_score});
886 :     $problem->attempted(1);
887 :     $problem->num_correct($pg->{state}->{num_of_correct_ans});
888 :     $problem->num_incorrect($pg->{state}->{num_of_incorrect_ans});
889 :     $pureProblem->status($pg->{state}->{recorded_score});
890 :     $pureProblem->attempted(1);
891 :     $pureProblem->num_correct($pg->{state}->{num_of_correct_ans});
892 :     $pureProblem->num_incorrect($pg->{state}->{num_of_incorrect_ans});
893 : sh002i 1227 if ($db->putUserProblem($pureProblem)) {
894 :     $scoreRecordedMessage = "Your score was recorded.";
895 :     } else {
896 :     $scoreRecordedMessage = "Your score was not recorded because there was a failure in storing the problem record to the database.";
897 :     }
898 : gage 1007 # write to the transaction log, just to make sure
899 :     writeLog($self->{ce}, "transaction",
900 :     $problem->problem_id."\t".
901 :     $problem->set_id."\t".
902 :     $problem->user_id."\t".
903 :     $problem->source_file."\t".
904 :     $problem->value."\t".
905 :     $problem->max_attempts."\t".
906 :     $problem->problem_seed."\t".
907 :     $pureProblem->status."\t".
908 :     $pureProblem->attempted."\t".
909 :     $pureProblem->last_answer."\t".
910 :     $pureProblem->num_correct."\t".
911 :     $pureProblem->num_incorrect
912 :     );
913 : sh002i 1227 } else {
914 : sh002i 2505 if (before($set->open_date) or after($set->due_date)) {
915 : sh002i 3357 $scoreRecordedMessage = "Your score was not recorded because this homework set is closed.";
916 : sh002i 1227 } else {
917 :     $scoreRecordedMessage = "Your score was not recorded.";
918 :     }
919 : gage 1007 }
920 : sh002i 1227 } else {
921 : sh002i 2505 $scoreRecordedMessage = "Your score was not recorded because this problem has not been assigned to you.";
922 : sh002i 431 }
923 : sh002i 425 }
924 : sh002i 1227
925 : gage 794 # logging student answers
926 : gage 1387
927 :     my $answer_log = $self->{ce}->{courseFiles}->{logs}->{'answer_log'};
928 : jjholt 2156 if ( defined($answer_log ) and defined($pureProblem)) {
929 : dpvc 2735 if ($submitAnswers && !$authz->hasPermissions($effectiveUser, "dont_log_past_answers")) {
930 :     my $answerString = ""; my $scores = "";
931 : gage 794 my %answerHash = %{ $pg->{answers} };
932 : gage 1775 # FIXME this is the line 552 error. make sure original student ans is defined.
933 :     # The fact that it is not defined is probably due to an error in some answer evaluator.
934 :     # But I think it is useful to suppress this error message in the log.
935 : apizer 4030 foreach (sortByName(undef, keys %answerHash)) {
936 : sh002i 2635 my $orig_ans = $answerHash{$_}->{original_student_ans};
937 :     my $student_ans = defined $orig_ans ? $orig_ans : '';
938 : dpvc 2735 $answerString .= $student_ans."\t";
939 :     $scores .= $answerHash{$_}->{score} >= 1 ? "1" : "0";
940 : gage 1776 }
941 :     $answerString = '' unless defined($answerString); # insure string is defined.
942 : gage 1387 writeCourseLog($self->{ce}, "answer_log",
943 :     join("",
944 :     '|', $problem->user_id,
945 :     '|', $problem->set_id,
946 :     '|', $problem->problem_id,
947 : dpvc 2735 '|', $scores, "\t",
948 : gage 1387 time(),"\t",
949 :     $answerString,
950 :     ),
951 :     );
952 :    
953 : gage 794 }
954 : sh002i 1223 }
955 :    
956 : sh002i 3485 debug("end answer processing");
957 : sh002i 1223
958 : sh002i 429 ##### output #####
959 : sh002i 1197 # custom message for editor
960 : toenail 2349 if ($authz->hasPermissions($user, "modify_problem_sets") and defined $editMode) {
961 : sh002i 1197 if ($editMode eq "temporaryFile") {
962 : gage 3034 print CGI::p(CGI::div({class=>'temporaryFile'}, "Viewing temporary file: ", $problem->source_file));
963 : sh002i 1197 } elsif ($editMode eq "savedFile") {
964 : toenail 2349 # taken care of in the initialization phase
965 : sh002i 1197 }
966 :     }
967 : gage 3034 print CGI::start_div({class=>"problemHeader"});
968 :    
969 :    
970 : toenail 2349
971 : sh002i 431 # attempt summary
972 : gage 1480 #FIXME -- the following is a kludge: if showPartialCorrectAnswers is negative don't show anything.
973 :     # until after the due date
974 : toenail 2398 # do I need to check $will{showCorrectAnswers} to make preflight work??
975 : sh002i 2505 if (($pg->{flags}->{showPartialCorrectAnswers} >= 0 and $submitAnswers) ) {
976 : sh002i 431 # print this if user submitted answers OR requested correct answers
977 : gage 1480
978 : gage 1507 print $self->attemptResults($pg, 1,
979 : sh002i 719 $will{showCorrectAnswers},
980 : gage 939 $pg->{flags}->{showPartialCorrectAnswers}, 1, 1);
981 : sh002i 719 } elsif ($checkAnswers) {
982 :     # print this if user previewed answers
983 : sh002i 2767 print CGI::div({class=>'ResultsWithError'},"ANSWERS ONLY CHECKED -- ANSWERS NOT RECORDED"), CGI::br();
984 : gage 1507 print $self->attemptResults($pg, 1, $will{showCorrectAnswers}, 1, 1, 1);
985 : sh002i 719 # show attempt answers
986 : gage 1507 # show correct answers if asked
987 : sh002i 719 # show attempt results (correctness)
988 : gage 1507 # show attempt previews
989 : sh002i 623 } elsif ($previewAnswers) {
990 :     # print this if user previewed answers
991 : sh002i 2767 print CGI::div({class=>'ResultsWithError'},"PREVIEW ONLY -- ANSWERS NOT RECORDED"),CGI::br(),$self->attemptResults($pg, 1, 0, 0, 0, 1);
992 : sh002i 719 # show attempt answers
993 : sh002i 623 # don't show correct answers
994 : sh002i 719 # don't show attempt results (correctness)
995 :     # show attempt previews
996 : sh002i 431 }
997 : gage 392
998 : malsyned 755 print CGI::end_div();
999 :    
1000 : sh002i 2505 # main form
1001 : gage 4090 print "\n";
1002 :     print CGI::start_form(-method=>"POST", -action=> $r->uri,-name=>"problemMainForm", onSubmit=>"submitAction()");
1003 : sh002i 2505 print $self->hidden_authen_fields;
1004 : gage 4090 print "\n";
1005 : malsyned 755 print CGI::start_div({class=>"problem"});
1006 : sh002i 2505 print CGI::p($pg->{body_text});
1007 : gage 4235 print CGI::p(CGI::b("Note: "). CGI::i($pg->{result}->{msg})) if $pg->{result}->{msg};
1008 : sh002i 3626 print $editorLink; # this is empty unless it is appropriate to have an editor link.
1009 : sh002i 2505 print CGI::end_div();
1010 :    
1011 :     print CGI::start_p();
1012 :    
1013 :     if ($can{showCorrectAnswers}) {
1014 :     print CGI::checkbox(
1015 :     -name => "showCorrectAnswers",
1016 :     -checked => $will{showCorrectAnswers},
1017 :     -label => "Show correct answers",
1018 : malsyned 755 );
1019 : sh002i 2505 }
1020 :     if ($can{showHints}) {
1021 :     print CGI::div({style=>"color:red"},
1022 :     CGI::checkbox(
1023 :     -name => "showHints",
1024 :     -checked => $will{showHints},
1025 :     -label => "Show Hints",
1026 :     )
1027 :     );
1028 :     }
1029 :     if ($can{showSolutions}) {
1030 :     print CGI::checkbox(
1031 :     -name => "showSolutions",
1032 :     -checked => $will{showSolutions},
1033 :     -label => "Show Solutions",
1034 :     );
1035 :     }
1036 :    
1037 :     if ($can{showCorrectAnswers} or $can{showHints} or $can{showSolutions}) {
1038 :     print CGI::br();
1039 :     }
1040 :    
1041 :     print CGI::submit(-name=>"previewAnswers", -label=>"Preview Answers");
1042 :     if ($can{checkAnswers}) {
1043 :     print CGI::submit(-name=>"checkAnswers", -label=>"Check Answers");
1044 :     }
1045 : jj 2685 if ($can{getSubmitButton}) {
1046 : sh002i 2507 if ($user ne $effectiveUser) {
1047 :     # if acting as a student, make it clear that answer submissions will
1048 :     # apply to the student's records, not the professor's.
1049 :     print CGI::submit(-name=>"submitAnswers", -label=>"Submit Answers for $effectiveUser");
1050 :     } else {
1051 : sh002i 2505 print CGI::submit(-name=>"submitAnswers", -label=>"Submit Answers");
1052 : sh002i 2507 }
1053 : sh002i 2505 }
1054 :    
1055 :     print CGI::end_p();
1056 :    
1057 : gage 794 print CGI::start_div({class=>"scoreSummary"});
1058 : sh002i 1131
1059 : sh002i 431 # score summary
1060 :     my $attempts = $problem->num_correct + $problem->num_incorrect;
1061 :     my $attemptsNoun = $attempts != 1 ? "times" : "time";
1062 : gage 2875 my $problem_status = $problem->status || 0;
1063 :     my $lastScore = sprintf("%.0f%%", $problem_status * 100); # Round to whole number
1064 : sh002i 431 my ($attemptsLeft, $attemptsLeftNoun);
1065 :     if ($problem->max_attempts == -1) {
1066 :     # unlimited attempts
1067 :     $attemptsLeft = "unlimited";
1068 :     $attemptsLeftNoun = "attempts";
1069 :     } else {
1070 :     $attemptsLeft = $problem->max_attempts - $attempts;
1071 :     $attemptsLeftNoun = $attemptsLeft == 1 ? "attempt" : "attempts";
1072 :     }
1073 : malsyned 755
1074 :     my $setClosed = 0;
1075 : sh002i 476 my $setClosedMessage;
1076 : sh002i 2505 if (before($set->open_date) or after($set->due_date)) {
1077 : malsyned 755 $setClosed = 1;
1078 : sh002i 3318 if (before($set->open_date)) {
1079 : sh002i 3357 $setClosedMessage = "This homework set is not yet open.";
1080 : sh002i 3318 } elsif (after($set->due_date)) {
1081 : sh002i 3357 $setClosedMessage = "This homework set is closed.";
1082 : sh002i 476 }
1083 :     }
1084 : sh002i 3318 #if (before($set->open_date) or after($set->due_date)) {
1085 :     # $setClosed = 1;
1086 : sh002i 3357 # $setClosedMessage = "This homework set is closed.";
1087 : sh002i 3318 # if ($authz->hasPermissions($user, "view_answers")) {
1088 :     # $setClosedMessage .= " However, since you are a privileged user, additional attempts will be recorded.";
1089 :     # } else {
1090 :     # $setClosedMessage .= " Additional attempts will not be recorded.";
1091 :     # }
1092 :     #}
1093 : gage 3391 unless (defined( $pg->{state}->{state_summary_msg}) and $pg->{state}->{state_summary_msg}=~/\S/) {
1094 :     my $notCountedMessage = ($problem->value) ? "" : "(This problem will not count towards your grade.)";
1095 : gage 4235 print CGI::p(join("",
1096 : gage 3391 $submitAnswers ? $scoreRecordedMessage . CGI::br() : "",
1097 :     "You have attempted this problem $attempts $attemptsNoun.", CGI::br(),
1098 :     $submitAnswers ?"You received a score of ".sprintf("%.0f%%", $pg->{result}->{score} * 100)." for this attempt.".CGI::br():'',
1099 :     $problem->attempted
1100 :     ? "Your overall recorded score is $lastScore. $notCountedMessage" . CGI::br()
1101 :     : "",
1102 :     $setClosed ? $setClosedMessage : "You have $attemptsLeft $attemptsLeftNoun remaining."
1103 : gage 4235 ));
1104 : gage 3391 }else {
1105 :     print CGI::p($pg->{state}->{state_summary_msg});
1106 :     }
1107 : gage 794 print CGI::end_div();
1108 : malsyned 755
1109 : sh002i 1131 # save state for viewOptions
1110 : gage 1591 print CGI::hidden(
1111 :     -name => "showOldAnswers",
1112 :     -value => $will{showOldAnswers}
1113 :     ),
1114 : gage 1479
1115 : gage 1591 CGI::hidden(
1116 :     -name => "displayMode",
1117 :     -value => $self->{displayMode}
1118 :     );
1119 :     print( CGI::hidden(
1120 :     -name => 'editMode',
1121 :     -value => $self->{editMode},
1122 :     )
1123 :     ) if defined($self->{editMode}) and $self->{editMode} eq 'temporaryFile';
1124 :     print( CGI::hidden(
1125 :     -name => 'sourceFilePath',
1126 :     -value => $self->{problem}->{source_file}
1127 :     )) if defined($self->{problem}->{source_file});
1128 : jj 2251
1129 :     print( CGI::hidden(
1130 :     -name => 'problemSeed',
1131 :     -value => $r->param("problemSeed")
1132 :     )) if defined($r->param("problemSeed"));
1133 : gage 1591
1134 : sh002i 1131 # end of main form
1135 :     print CGI::endform();
1136 :    
1137 :     print CGI::start_div({class=>"problemFooter"});
1138 :    
1139 : sh002i 1908 ## arguments for answer inspection button
1140 :     #my $prof_url = $ce->{webworkURLs}->{oldProf};
1141 :     #my $webworkURL = $ce->{webworkURLs}->{root};
1142 :     #my $cgi_url = $prof_url;
1143 :     #$cgi_url=~ s|/[^/]*$||; # clip profLogin.pl
1144 :     #my $authen_args = $self->url_authen_args();
1145 :     #my $showPastAnswersURL = "$webworkURL/$courseName/instructor/show_answers/";
1146 : gage 794
1147 : sh002i 1908 my $pastAnswersPage = $urlpath->newFromModule("WeBWorK::ContentGenerator::Instructor::ShowAnswers",
1148 :     courseID => $courseName);
1149 :     my $showPastAnswersURL = $self->systemLink($pastAnswersPage, authen => 0); # no authen info for form action
1150 :    
1151 : gage 794 # print answer inspection button
1152 : toenail 2398 if ($authz->hasPermissions($user, "view_answers")) {
1153 : gage 794 print "\n",
1154 : dpvc 4389 CGI::start_form(-method=>"POST",-action=>$showPastAnswersURL,-target=>"WW_Info"),"\n",
1155 : sh002i 1131 $self->hidden_authen_fields,"\n",
1156 : gage 1937 CGI::hidden(-name => 'courseID', -value=>$courseName), "\n",
1157 :     CGI::hidden(-name => 'problemID', -value=>$problem->problem_id), "\n",
1158 :     CGI::hidden(-name => 'setID', -value=>$problem->set_id), "\n",
1159 : gage 1395 CGI::hidden(-name => 'studentUser', -value=>$problem->user_id), "\n",
1160 : sh002i 1131 CGI::p( {-align=>"left"},
1161 :     CGI::submit(-name => 'action', -value=>'Show Past Answers')
1162 :     ), "\n",
1163 :     CGI::endform();
1164 :     }
1165 : sh002i 667
1166 : sh002i 3626 ## feedback form url
1167 :     #my $feedbackPage = $urlpath->newFromModule("WeBWorK::ContentGenerator::Feedback",
1168 :     # courseID => $courseName);
1169 :     #my $feedbackURL = $self->systemLink($feedbackPage, authen => 0); # no authen info for form action
1170 :     #
1171 :     ##print feedback form
1172 :     #print
1173 :     # CGI::start_form(-method=>"POST", -action=>$feedbackURL),"\n",
1174 :     # $self->hidden_authen_fields,"\n",
1175 :     # CGI::hidden("module", __PACKAGE__),"\n",
1176 :     # CGI::hidden("set", $set->set_id),"\n",
1177 :     # CGI::hidden("problem", $problem->problem_id),"\n",
1178 :     # CGI::hidden("displayMode", $self->{displayMode}),"\n",
1179 :     # CGI::hidden("showOldAnswers", $will{showOldAnswers}),"\n",
1180 :     # CGI::hidden("showCorrectAnswers", $will{showCorrectAnswers}),"\n",
1181 :     # CGI::hidden("showHints", $will{showHints}),"\n",
1182 :     # CGI::hidden("showSolutions", $will{showSolutions}),"\n",
1183 :     # CGI::p({-align=>"left"},
1184 :     # CGI::submit(-name=>"feedbackForm", -label=>"Email instructor")
1185 :     # ),
1186 :     # CGI::endform(),"\n";
1187 : gage 794
1188 : sh002i 3626 print $self->feedbackMacro(
1189 :     module => __PACKAGE__,
1190 :     set => $self->{set}->set_id,
1191 :     problem => $problem->problem_id,
1192 :     displayMode => $self->{displayMode},
1193 :     showOldAnswers => $will{showOldAnswers},
1194 :     showCorrectAnswers => $will{showCorrectAnswers},
1195 :     showHints => $will{showHints},
1196 :     showSolutions => $will{showSolutions},
1197 :     );
1198 : sh002i 1908
1199 : sh002i 1131 print CGI::end_div();
1200 : gage 940
1201 : sh002i 424 # debugging stuff
1202 : sh002i 747 if (0) {
1203 : sh002i 738 print
1204 :     CGI::hr(),
1205 :     CGI::h2("debugging information"),
1206 :     CGI::h3("form fields"),
1207 :     ref2string($self->{formFields}),
1208 :     CGI::h3("user object"),
1209 :     ref2string($self->{user}),
1210 :     CGI::h3("set object"),
1211 :     ref2string($set),
1212 :     CGI::h3("problem object"),
1213 :     ref2string($problem),
1214 :     CGI::h3("PG object"),
1215 :     ref2string($pg, {'WeBWorK::PG::Translator' => 1});
1216 :     }
1217 : gage 392
1218 : sh002i 424 return "";
1219 : malsyned 353 }
1220 :    
1221 : jj 2539 1;

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