Annotation of loncom/interface/lonpdfupload.pm, revision 1.19
1.1 onken 1: # The LearningOnline Network with CAPA
1.12 bisitz 2: # PDF Form Upload Handler
1.1 onken 3: #
1.19 ! onken 4: # $Id: lonpdfupload.pm,v 1.18 2010/03/18 19:11:05 raeburn Exp $
1.1 onken 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: package Apache::lonpdfupload;
29:
30: use lib '/home/httpd/lib/perl';
31: use Apache::Constants qw(:common :http);
1.15 raeburn 32: use Apache::lonnet;
1.1 onken 33: use Apache::lonhtmlcommon();
34: use Apache::loncommon();
1.18 raeburn 35: use Apache::lonnavmaps();
1.1 onken 36: use Apache::lonlocal;
1.16 raeburn 37: use File::MMagic;
1.2 onken 38: use CAM::PDF;
1.18 raeburn 39: use LONCAPA qw(:DEFAULT :match);
1.1 onken 40:
41: use strict;
42:
43: sub handler() {
1.2 onken 44: my $r = shift;
1.15 raeburn 45: &Apache::loncommon::content_type($r,'text/html');
46: $r->send_http_header;
47: return OK if $r->header_only;
1.13 bisitz 48:
1.16 raeburn 49: # Needs to be in a course
50: if (!$env{'request.course.fn'}) {
51: # Not in a course
52: $env{'user.error.msg'}="/adm/pdfupload:bre:0:0:Cannot upload PDF forms unless in a course";
53: return HTTP_NOT_ACCEPTABLE;
54: }
55:
1.13 bisitz 56: # Breadcrumbs
1.15 raeburn 57: my $brcrum = [{'href' => '/adm/pdfupload',
1.13 bisitz 58: 'text' => 'Upload PDF Form'}];
1.16 raeburn 59: if ($env{'form.Uploaded'} && $env{'form.file'}) {
60: push(@{$brcrum},{'href' => '',
61: 'text' => 'PDF upload result'});
62: }
1.13 bisitz 63:
64: $r->print(&Apache::loncommon::start_page('Upload PDF Form',
65: undef,
66: {'bread_crumbs' => $brcrum,})
67: );
1.2 onken 68:
1.16 raeburn 69: if ($env{'request.course.id'}) {
70: my $permission = $env{'course.'.$env{'request.course.id'}.'.canuse_pdfforms'};
71: if ($permission eq '') {
72: my %domdefs = &Apache::lonnet::get_domain_defaults($env{'course.'.$env{'request.course.id'}.'.domain'});
73: $permission = $domdefs{'canuse_pdfforms'};
74: }
75: unless ($permission) {
76: $r->print('<p class="LC_warning">'.
77: &mt('Upload of PDF forms is not permitted for this course.').
78: '</p>'.
79: &Apache::loncommon::end_page());
80: return OK;
81: }
82: } else {
83: $r->print('<p class="LC_warning">'.
1.18 raeburn 84: &mt('Could not determine identity of this course.').' '.
85: &mt('You may need to [_1]re-select[_2] the course.','<a href="/adm/roles">','</a>').
1.16 raeburn 86: '</p>'.
87: &Apache::loncommon::end_page());
88: return OK;
89: }
90:
1.2 onken 91: # if a file was upload
92: if($env{'form.Uploaded'} && $env{'form.file'}) {
1.16 raeburn 93: my $mm = new File::MMagic;
94: my $mime_type = $mm->checktype_contents($env{'form.file'});
95: if ($mime_type eq 'application/pdf') {
96: $r->print(&processPDF);
97: } else {
98: $r->print('<p class="LC_error">'
99: .&mt("The uploaded file does not appear to be a PDF file.")
100: .'</p>');
101: }
1.2 onken 102: } else {
103: # print upload form
104: $r->print(&get_javascripts);
105: $r->print(&get_uploadform);
106: }
107:
108: #link to course-content
1.6 bisitz 109: $r->print('<hr />'
110: .'<p>'."\n"
1.5 bisitz 111: .'<a href="/adm/navmaps">'."\n"
1.14 raeburn 112: .&mt('Course Contents')."\n"
1.5 bisitz 113: .'</a>'."\n"
114: .'</p>'."\n"
115: );
1.1 onken 116:
1.2 onken 117: #&dumpenv($r); #debug -> prints the environment
1.7 onken 118: $r->print(&Apache::loncommon::end_page());
1.1 onken 119: return OK;
1.2 onken 120: }
1.1 onken 121:
122: sub get_javascripts() {
1.2 onken 123:
1.6 bisitz 124: my $message = &mt('Please choose a PDF-File.');
1.1 onken 125:
1.2 onken 126: # simple test if the upload ends with ".pdf"
127: # it's only for giving a message to the user
128: my $result .= <<END
129: <script type="text/javascript">
1.18 raeburn 130: // <![CDATA[
1.1 onken 131: function checkFilename(form) {
132: var fileExt = form.file.value;
133: fileExt = fileExt.match(/[.]pdf\$/g);
134: if(fileExt) {
135: return true;
136: }
1.2 onken 137: alert("$message");
1.1 onken 138: return false;
139: }
1.18 raeburn 140: // ]]>
1.2 onken 141: </script>
1.1 onken 142: END
143: ;
144: return $result;
145: }
146:
1.2 onken 147:
1.1 onken 148: sub get_uploadform() {
1.4 onken 149:
150: my %lt = &Apache::lonlocal::texthash(
1.6 bisitz 151: 'title' => 'Upload a PDF Form with filled Form Fields',
152: 'chFile' => 'File',
153: 'submit' => 'Upload',
1.4 onken 154: );
155:
1.5 bisitz 156: my $result =
157: '<br />'
1.18 raeburn 158: .'<form method="post" enctype="multipart/form-data" onsubmit="return checkFilename(this);" action="">'
1.5 bisitz 159: .&Apache::lonhtmlcommon::start_pick_box()
160: .&Apache::lonhtmlcommon::row_headline()
161: .'<h2>'.$lt{'title'}.'</h2>'
162: .&Apache::lonhtmlcommon::row_closure()
163: .&Apache::lonhtmlcommon::row_title($lt{'chFile'})
164: .'<input type="file" name="file" id="filename" />'
165: .&Apache::lonhtmlcommon::row_closure(1)
166: .&Apache::lonhtmlcommon::end_pick_box()
1.13 bisitz 167: .'<p>'
1.5 bisitz 168: .'<input type="submit" name="Uploaded" value="'.$lt{'submit'}.'" />'
1.13 bisitz 169: .'</p>'
1.5 bisitz 170: .'</form>'
1.6 bisitz 171: .'<br />';
1.5 bisitz 172:
1.1 onken 173: return $result;
174: }
175:
176: sub processPDF {
1.2 onken 177: my $result = (); # message for Browser
178: my @pdfdata = (); # answers from PDF-Forms
1.1 onken 179:
1.2 onken 180: @pdfdata = &get_pdf_data(); # get answers from PDF-Form
1.1 onken 181:
182: if (scalar @pdfdata) {
1.2 onken 183: &grade_pdf(@pdfdata);
1.1 onken 184: } else {
1.6 bisitz 185: $result .= '<p class="LC_error">'
186: .&mt("Can't find any valid PDF formfields.")
187: .'</p>';
1.1 onken 188: }
189: }
190:
191: sub get_pdf_data() {
192: my @data = ();
1.2 onken 193: my $pdf = CAM::PDF->new($env{'form.file'});
194:
1.19 ! onken 195: if($pdf) {
! 196: my @formFields = $pdf->getFormFieldList(); #get names of formfields
! 197:
! 198: foreach my $field (@formFields) {
! 199: my $dict = $pdf->getFormFieldDict($pdf->getFormField($field)); # get formfield dictonary
1.1 onken 200:
1.19 ! onken 201: # this is necessary because CAM::PDF has a problem with formfieldnames which include a
! 202: # dot in fieldnames. So a fieldname like "i.am.aFormfield" will offer three fieldnames
! 203: # "i", "i.am" and "i.am.aFormfield". The fragmentary names keep no values and will be ignored.
! 204: if($dict->{'V'}) {
! 205: push(@data, $field."?". $dict->{'V'}{'value'}); #binding fieldname with value
! 206: }
1.2 onken 207: }
1.19 ! onken 208: }
1.1 onken 209: return @data;
210: }
211:
212: sub grade_pdf {
213: my $result = ();
214: my @pdfdata = @_;
1.18 raeburn 215: my ($result,$meta,%grades,%problems,%foreigncourse,$debug);
216:
217: my $navmap = Apache::lonnavmaps::navmap->new();
218: if (!defined($navmap)) {
219: $result = '<h3>'.&mt('Verification of PDF form items failed').'</h3>'.
220: '<div class="LC_error">'.
221: &mt('Unable to retrieve information about course contents').' '.
222: &mt('You may need to [_1]re-select[_2] the course.','<a href="/adm/roles">','</a>').
223: '</div>';
224: return $result;
225: }
226: my %restitles;
227: foreach my $res ($navmap->retrieveResources()) {
228: my $symb = $res->symb;
229: $restitles{$symb} = $res->compTitle();
230: }
1.1 onken 231:
232: $debug .= "Found: ". scalar @pdfdata." Entries \n";
1.4 onken 233:
1.1 onken 234: foreach my $entry (sort(@pdfdata)) {
235: if ($entry =~ /^meta.*/) {
1.2 onken 236: $debug .= 'found: metadata -> '.$entry . "<br />";
237: my ($label, $value) = ($entry =~ /^([^?]*)\?(.*)/);
1.1 onken 238: my ($domain, $user) = split('&', $value);
1.4 onken 239: $user =~ s/(.*)\n/$1/; #TODO is that equals to chomp?
1.1 onken 240: if($user ne $env{'user.name'} or $domain ne $env{'user.domain'}) {
1.12 bisitz 241: return '<p class="LC_error">'
242: .&mt('Wrong username ([_1]) found in PDF file. Expected username: [_2]'
243: ,$user.':'.$domain
244: ,$env{'user.domain'}.':'.$env{'user.name'})
245: .'</p>';
1.1 onken 246: }
247:
1.17 raeburn 248: } elsif ($entry =~ /^upload.*/) {
1.1 onken 249: $debug .= 'found: a problem -> '.$entry;
1.2 onken 250: my ($label, $value) = ($entry =~ /^([^?]*)\?(.*)/);
1.1 onken 251: my ($symb, $part, $type, $HWVAL) = split('&', $label);
1.17 raeburn 252: my ($map,$id,$resource)=&Apache::lonnet::decode_symb($symb);
1.18 raeburn 253: if ($map =~ m{^uploaded/($match_domain)/($match_courseid)/default(_?\d*)\.(page|sequence)}) {
254: my $mapcid = $1.'_'.$2;
255: if ($mapcid ne $env{'request.course.id'}) {
256: push(@{$foreigncourse{$mapcid}},$symb);
257: }
258: }
259: next unless (exists($restitles{$symb}));
1.1 onken 260: $value =~ s/(.*)\n/$1/;
261:
1.6 bisitz 262: #filter incorrect radiobuttons (Bug in CABAReT Stage)
1.17 raeburn 263: if ($type eq 'radiobuttonresponse' && $value eq 'Off' ) {
1.1 onken 264: next;
265: }
266:
267: my $submit = $part;
268: $submit =~ s/part_(.*)/submit_$1/;
1.17 raeburn 269: if ($problems{$symb.$part}) {
1.1 onken 270: $problems{$symb.$part}{$HWVAL} = $value;
271: } else {
272: $problems{$symb.$part} = { 'resource' => $resource,
1.11 onken 273: 'symb' => $symb,
1.1 onken 274: 'submitted' => $part,
275: $submit => 'Answer',
276: $HWVAL => $value};
277: }
278: } else {
279: $debug .= 'found: -> '.$entry;
280: next;
281: }
282: }
1.4 onken 283: #$result .= $debug;
1.1 onken 284:
1.18 raeburn 285: $result .= '<h3>'.&mt('Result of PDF Form upload').'</h3>';
1.17 raeburn 286:
287: if (keys(%problems) > 0) {
288: $result .= &Apache::loncommon::start_data_table()
289: .&Apache::loncommon::start_data_table_header_row()
290: .'<th>'.&mt('Problem Name').'</th>'
291: .'<th>'.&mt('Grading').'</th>'
292: .&Apache::loncommon::start_data_table_header_row()
293: .&Apache::loncommon::end_data_table_header_row();
294:
295: foreach my $key (sort(keys(%problems))) {
296: my %problem = %{$problems{$key}};
297: my ($problemname, $grade) = &grade_problem(%problem);
298:
299: $result .= &Apache::loncommon::start_data_table_row();
1.18 raeburn 300: $result .= '<td><a href="/res/'.$problem{'resource'}.
301: '?symb='.
302: &HTML::Entities::encode($problem{'symb'},'"&<>').
303: '">'.$problemname.'</a></td><td class="';
1.17 raeburn 304: if ($grade eq "EXACT_ANS" || $grade eq "APPROX_ANS") {
1.18 raeburn 305: $result .= 'LC_answer_correct';
1.17 raeburn 306: } else {
1.18 raeburn 307: $result .= 'LC_answer_charged_try';
1.17 raeburn 308: }
1.18 raeburn 309: $result .= '">';
1.17 raeburn 310: $grade = &parse_grade_answer($grade);
1.18 raeburn 311: $result .= $grade.'</span></td>';
1.17 raeburn 312: $result .= &Apache::loncommon::end_data_table_row();
1.1 onken 313: }
1.17 raeburn 314: $result .= &Apache::loncommon::end_data_table();
315: } else {
316: $result .= '<p class="LC_warning">'.
317: &mt('As no gradable form items were found, no submissions have been recorded.').
318: '</p>';
1.4 onken 319: }
1.18 raeburn 320: if (keys(%foreigncourse)) {
321: my ($numother,$othercrsmsg);
322: foreach my $cid (sort(keys(%foreigncourse))) {
323: my %coursehash = &Apache::lonnet::coursedescription($cid,
324: {'one_time' => 1});
325: if (ref($foreigncourse{$cid}) eq 'ARRAY') {
326: if ($numother) {
327: $othercrsmsg .= '</li><li>';
328: }
329: $othercrsmsg .= '<b>'.$coursehash{'description'}.'</b><ul>'."\n";
330: foreach my $symb (@{$foreigncourse{$cid}}) {
331: my ($map,$id,$resource)=&Apache::lonnet::decode_symb($symb);
332: $othercrsmsg .= '<li>'.$resource.'</li>';
333: }
334: $othercrsmsg .= '</ul>';
335: $numother ++;
336: }
337: }
338: if ($numother) {
339: $result .= '<div class="LC_warning">';
340: if ($numother > 1) {
341: $result .= &mt('Your uploaded PDF form contained the following resource(s) from [_1] different courses:','<b>'.$numother.'</b>')."\n".'<ul><li>'.
342: $othercrsmsg.'</li></ul>';
343: } else {
344: $result .= &mt('Your uploaded PDF form contained the following resource(s) from a different course:').' '.$othercrsmsg.
345: &mt('Did you download the PDF form from another course and upload it to the wrong course?');
346: }
347: $result .= '</div>';
348: }
349: }
1.1 onken 350:
1.18 raeburn 351: return $result;
1.1 onken 352: }
353:
354: sub grade_problem {
355: my %problem = @_;
1.7 onken 356: my ($title, $part) = ();
1.1 onken 357:
1.7 onken 358: &Apache::loncommon::ssi_with_retries('/res/'.$problem{'resource'}, 5, %problem);
1.1 onken 359:
1.7 onken 360: $title = &Apache::lonnet::gettitle($problem{'symb'});
361: $part = $problem{submitted};
1.1 onken 362: $part =~ s/part_(.*)/$1/;
1.7 onken 363: unless($part eq '0') {
364: #add information about part number
365: $title .= " - Part $part";
366: }
1.1 onken 367:
368: my %problemhash = &Apache::lonnet::restore($problem{'symb'});
369: my $grade = $problemhash{"resource.$part.award"};
370:
1.7 onken 371: return ($title, $grade);
1.1 onken 372: }
373:
1.8 onken 374: sub parse_grade_answer {
375: my ($shortcut) = @_;
376: my %answerhash = ('EXACT_ANS' => &mt('You are correct.'),
1.10 onken 377: 'APPROX_ANS' => &mt('You are correct.'),
1.8 onken 378: 'INCORRECT' => &mt('You are incorrect'),
379: );
380:
381: foreach my $key (keys %answerhash) {
382: if($shortcut eq $key) {
383: return $answerhash{$shortcut};
384: }
385: }
386: return &mt('See course contents for further information.');
387:
388: }
389:
390:
1.1 onken 391: sub dumpenv {
392: my $r = shift;
393:
394: $r->print ("<br />-------------------<br />");
395: foreach my $key (sort (keys %env)) {
396: $r->print ("<br />$key -> $env{$key}");
397: }
398: $r->print ("<br />-------------------<br />");
399: $r->print ("<br />-------------------<br />");
400: foreach my $key (sort (keys %ENV)) {
401: $r->print ("<br />$key -> $ENV{$key}");
402: }
403: $r->print ("<br />-------------------<br />");
404:
405: }
406:
407: 1;
408: __END__
409:
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