1: # The LearningOnline Network
2: # Feedback
3: #
4: # $Id: lonfeedback.pm,v 1.49 2003/07/05 10:07:11 www Exp $
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: # (Internal Server Error Handler
29: #
30: # (Login Screen
31: # 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14,
32: # 1/14/00,5/29,5/30,6/1,6/29,7/1,11/9 Gerd Kortemeyer)
33: #
34: # 3/1/1 Gerd Kortemeyer)
35: #
36: # 3/1,2/3,2/5,2/6,2/8 Gerd Kortemeyer
37: # 2/9 Guy Albertelli
38: # 2/10 Gerd Kortemeyer
39: # 2/13 Guy Albertelli
40: # 7/25 Gerd Kortemeyer
41: # 7/26 Guy Albertelli
42: # 7/26,8/10,10/1,11/5,11/6,12/27,12/29 Gerd Kortemeyer
43: # YEAR=2002
44: # 1/1,1/16 Gerd Kortemeyer
45: #
46:
47: package Apache::lonfeedback;
48:
49: use strict;
50: use Apache::Constants qw(:common);
51: use Apache::lonmsg();
52: use Apache::loncommon();
53: use Apache::lontexconvert();
54:
55: sub mail_screen {
56: my ($r,$feedurl,$options) = @_;
57: my $bodytag=&Apache::loncommon::bodytag('Resource Feedback and Discussion',
58: '','onLoad="window.focus();"');
59: my $latexHelp = Apache::loncommon::helpLatexCheatsheet();
60: $r->print(<<ENDDOCUMENT);
61: <html>
62: <head>
63: <title>The LearningOnline Network with CAPA</title>
64: <meta http-equiv="pragma" content="no-cache"></meta>
65: <script>
66: function gosubmit() {
67: var rec=0;
68: if (typeof(document.mailform.elements.author)!="undefined") {
69: if (document.mailform.elements.author.checked) {
70: rec=1;
71: }
72: }
73: if (typeof(document.mailform.elements.question)!="undefined") {
74: if (document.mailform.elements.question.checked) {
75: rec=1;
76: }
77: }
78: if (typeof(document.mailform.elements.course)!="undefined") {
79: if (document.mailform.elements.course.checked) {
80: rec=1;
81: }
82: }
83: if (typeof(document.mailform.elements.policy)!="undefined") {
84: if (document.mailform.elements.policy.checked) {
85: rec=1;
86: }
87: }
88: if (typeof(document.mailform.elements.discuss)!="undefined") {
89: if (document.mailform.elements.discuss.checked) {
90: rec=1;
91: }
92: }
93: if (typeof(document.mailform.elements.anondiscuss)!="undefined") {
94: if (document.mailform.elements.anondiscuss.checked) {
95: rec=1;
96: }
97: }
98:
99: if (rec) {
100: document.mailform.submit();
101: } else {
102: alert('Please check a feedback type.');
103: }
104: }
105: </script>
106: </head>
107: $bodytag
108: <h2><tt>$feedurl</tt></h2>
109: <form action="/adm/feedback" method="post" name="mailform"
110: enctype="multipart/form-data">
111: <input type=hidden name=postdata value="$feedurl">
112: Please check at least one of the following feedback types:
113: $options<hr>
114: My question/comment/feedback:<p>
115: $latexHelp
116: <textarea name=comment cols=60 rows=10 wrap=hard>
117: </textarea><p>
118: Attachment (128 KB max size): <input type="file" name="attachment" />
119: </p>
120: <p>
121: <input type="hidden" name="sendit" value="1" />
122: <input type=button value="Send Feedback" onClick='gosubmit();' />
123: </p>
124: </form>
125: ENDDOCUMENT
126: $r->print(&generate_preview_button().'</body></html>');
127: }
128:
129: sub fail_redirect {
130: my ($r,$feedurl) = @_;
131: $r->print (<<ENDFAILREDIR);
132: <head><title>Feedback not sent</title>
133: <meta http-equiv="pragma" content="no-cache"></meta>
134: <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
135: </head>
136: <html>
137: <body bgcolor="#FFFFFF">
138: <img align=right src=/adm/lonIcons/lonlogos.gif>
139: <b>Sorry, no recipients ...</b>
140: </body>
141: </html>
142: ENDFAILREDIR
143: }
144:
145: sub redirect_back {
146: my ($r,$feedurl,$typestyle,$sendsomething,$sendposts,$status) = @_;
147: $r->print (<<ENDREDIR);
148: <head>
149: <title>Feedback sent</title>
150: <meta http-equiv="pragma" content="no-cache"></meta>
151: <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
152: </head>
153: <html>
154: <body bgcolor="#FFFFFF" onLoad='if (window.name!="loncapaclient") { this.document.reldt.submit(); self.close(); }'>
155: <img align=right src=/adm/lonIcons/lonlogos.gif>
156: $typestyle
157: <b>Sent $sendsomething message(s), and $sendposts post(s).</b>
158: <font color=red>$status</font>
159: <form name="reldt" action="$feedurl" target="loncapaclient">
160: </form>
161: </body>
162: </html>
163: ENDREDIR
164: }
165:
166: sub no_redirect_back {
167: my ($r,$feedurl) = @_;
168: $r->print (<<ENDNOREDIR);
169: <head><title>Feedback not sent</title>
170: <meta http-equiv="pragma" content="no-cache"></meta>
171: ENDNOREDIR
172:
173: if ($feedurl!~/^\/adm\/feedback/) {
174: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2; url='.$feedurl.'">');
175: }
176:
177: $r->print (<<ENDNOREDIRTWO);
178: </head>
179: <html>
180: <body bgcolor="#FFFFFF" onLoad='if (window.name!="loncapaclient") { self.close(); }'>
181: <img align=right src=/adm/lonIcons/lonlogos.gif>
182: <b>Sorry, no feedback possible on this resource ...</b>
183: </body>
184: </html>
185: ENDNOREDIRTWO
186: }
187:
188: sub screen_header {
189: my ($feedurl) = @_;
190: my $msgoptions='';
191: my $discussoptions='';
192: if (($feedurl=~/^\/res\//) && ($feedurl!~/^\/res\/adm/)) {
193: $msgoptions=
194: '<p><input type=checkbox name=author> Feedback to resource author';
195: }
196: if (&feedback_available(1)) {
197: $msgoptions.=
198: '<br><input type=checkbox name=question> Question about resource content';
199: }
200: if (&feedback_available(0,1)) {
201: $msgoptions.=
202: '<br><input type=checkbox name=course> '.
203: 'Question/Comment/Feedback about course content';
204: }
205: if (&feedback_available(0,0,1)) {
206: $msgoptions.=
207: '<br><input type=checkbox name=policy> '.
208: 'Question/Comment/Feedback about course policy';
209: }
210:
211: if ($ENV{'request.course.id'}) {
212: if (&Apache::lonnet::allowed('pch',
213: $ENV{'request.course.id'}.
214: ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
215: $discussoptions='<input type="checkbox" name="discuss" onClick="this.form.anondiscuss.checked=false;"> '.
216: 'Contribution to course discussion of resource';
217: $discussoptions.='<br><input type="checkbox" name="anondiscuss" onClick="this.form.discuss.checked=false;"> '.
218: 'Anonymous contribution to course discussion of resource'.
219: ' <i>(name only visible to course faculty)</i>';
220: }
221: }
222: if ($msgoptions) { $msgoptions='<h2>Sending Messages</h2>'.$msgoptions; }
223: if ($discussoptions) {
224: $discussoptions='<h2>Discussion Contributions</h2>'.$discussoptions; }
225: return $msgoptions.$discussoptions;
226: }
227:
228: sub resource_output {
229: my ($feedurl) = @_;
230: my $usersaw=&Apache::lonnet::ssi_body($feedurl);
231: $usersaw=~s/\<body[^\>]*\>//gi;
232: $usersaw=~s/\<\/body\>//gi;
233: $usersaw=~s/\<html\>//gi;
234: $usersaw=~s/\<\/html\>//gi;
235: $usersaw=~s/\<head\>//gi;
236: $usersaw=~s/\<\/head\>//gi;
237: $usersaw=~s/action\s*\=/would_be_action\=/gi;
238: return $usersaw;
239: }
240:
241: sub clear_out_html {
242: my ($message,$override)=@_;
243: my $cid=$ENV{'request.course.id'};
244: if (($ENV{"course.$cid.allow_limited_html_in_feedback"} =~ m/yes/i) ||
245: ($override)) {
246: # allows <B> <I> <P> <A> <LI> <OL> <UL> <EM> <BR> <TT> <STRONG>
247: # <BLOCKQUOTE> <DIV .*> <DIV> <IMG>
248: my %html=(B=>1, I=>1, P=>1, A=>1, LI=>1, OL=>1, UL=>1, EM=>1,
249: BR=>1, TT=>1, STRONG=>1, BLOCKQUOTE=>1, DIV=>1, IMG=>1);
250:
251: $message =~ s/\<(\/?\s*(\w+)[^\>\<]*)/
252: {($html{uc($2)}&&(length($1)<1000))?"\<$1":"\<$1"}/ge;
253: $message =~ s/(\<?\s*(\w+)[^\<\>]*)\>/
254: {($html{uc($2)}&&(length($1)<1000))?"$1\>":"$1\>"}/ge;
255: } else {
256: $message=~s/\<\/*m\s*\>//g;
257: $message=~s/\</\<\;/g;
258: $message=~s/\>/\>\;/g;
259: }
260: return $message;
261: }
262:
263: sub assemble_email {
264: my ($feedurl,$message,$prevattempts,$usersaw,$useranswer)=@_;
265: my $email=<<"ENDEMAIL";
266: Refers to <a href="$feedurl">$feedurl</a>
267:
268: $message
269: ENDEMAIL
270: my $citations=<<"ENDCITE";
271: <h2>Previous attempts of student (if applicable)</h2>
272: $prevattempts
273: <p><hr>
274: <h2>Original screen output (if applicable)</h2>
275: $usersaw
276: <h2>Correct Answer(s) (if applicable)</h2>
277: $useranswer
278: ENDCITE
279: return ($email,$citations);
280: }
281:
282: sub secapply {
283: my $rec=shift;
284: my $defaultflag=shift;
285: $rec=~s/\s+//g;
286: $rec=~s/\@/\:/g;
287: my ($adr,$sections)=($rec=~/^([^\(]+)\(([^\)]+)\)/);
288: if ($sections) {
289: foreach (split(/\;/,$sections)) {
290: if (($_ eq $ENV{'request.course.sec'}) ||
291: ($defaultflag && ($_ eq '*'))) {
292: return $adr;
293: }
294: }
295: } else {
296: return $rec;
297: }
298: return '';
299: }
300:
301: sub decide_receiver {
302: my ($feedurl,$author,$question,$course,$policy,$defaultflag) = @_;
303: my $typestyle='';
304: my %to=();
305: if ($ENV{'form.author'}||$author) {
306: $typestyle.='Submitting as Author Feedback<br>';
307: $feedurl=~/^\/res\/(\w+)\/(\w+)\//;
308: $to{$2.':'.$1}=1;
309: }
310: if ($ENV{'form.question'}||$question) {
311: $typestyle.='Submitting as Question<br>';
312: foreach (split(/\,/,
313: $ENV{'course.'.$ENV{'request.course.id'}.'.question.email'})
314: ) {
315: my $rec=&secapply($_,$defaultflag);
316: if ($rec) { $to{$rec}=1; }
317: }
318: }
319: if ($ENV{'form.course'}||$course) {
320: $typestyle.='Submitting as Comment<br>';
321: foreach (split(/\,/,
322: $ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'})
323: ) {
324: my $rec=&secapply($_,$defaultflag);
325: if ($rec) { $to{$rec}=1; }
326: }
327: }
328: if ($ENV{'form.policy'}||$policy) {
329: $typestyle.='Submitting as Policy Feedback<br>';
330: foreach (split(/\,/,
331: $ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'})
332: ) {
333: my $rec=&secapply($_,$defaultflag);
334: if ($rec) { $to{$rec}=1; }
335: }
336: }
337: if ((scalar(%to) eq '0') && (!$defaultflag)) {
338: ($typestyle,%to)=
339: &decide_receiver($feedurl,$author,$question,$course,$policy,1);
340: }
341: return ($typestyle,%to);
342: }
343:
344: sub feedback_available {
345: my ($question,$course,$policy)=@_;
346: my ($typestyle,%to)=&decide_receiver('',0,$question,$course,$policy);
347: return scalar(%to);
348: }
349:
350: sub send_msg {
351: my ($feedurl,$email,$citations,$attachmenturl,%to)=@_;
352: my $status='';
353: my $sendsomething=0;
354: foreach (keys %to) {
355: if ($_) {
356: my $declutter=&Apache::lonnet::declutter($feedurl);
357: unless (&Apache::lonmsg::user_normal_msg(split(/\:/,$_),
358: 'Feedback ['.$declutter.']',$email,$citations,$feedurl,
359: $attachmenturl)=~/ok/) {
360: $status.='<br>Error sending message to '.$_.'<br>';
361: } else {
362: $sendsomething++;
363: }
364: }
365: }
366:
367: my %record=&Apache::lonnet::restore('_feedback');
368: my ($temp)=keys %record;
369: unless ($temp=~/^error\:/) {
370: my %newrecord=();
371: $newrecord{'resource'}=$feedurl;
372: $newrecord{'subnumber'}=$record{'subnumber'}+1;
373: unless (&Apache::lonnet::cstore(\%newrecord,'_feedback') eq 'ok') {
374: $status.='<br>Not registered<br>';
375: }
376: }
377:
378: return ($status,$sendsomething);
379: }
380:
381: sub adddiscuss {
382: my ($symb,$email,$anon,$attachmenturl)=@_;
383: my $status='';
384: if (&Apache::lonnet::allowed('pch',$ENV{'request.course.id'}.
385: ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
386:
387: my %contrib=('message' => $email,
388: 'sendername' => $ENV{'user.name'},
389: 'senderdomain' => $ENV{'user.domain'},
390: 'screenname' => $ENV{'environment.screenname'},
391: 'plainname' => $ENV{'environment.firstname'}.' '.
392: $ENV{'environment.middlename'}.' '.
393: $ENV{'environment.lastname'}.' '.
394: $ENV{'enrironment.generation'},
395: 'attachmenturl'=> $attachmenturl);
396: if ($anon) {
397: $contrib{'anonymous'}='true';
398: }
399: if (($symb) && ($email)) {
400: $status='Adding to class discussion'.($anon?' (anonymous)':'').': '.
401: &Apache::lonnet::store(\%contrib,$symb,$ENV{'request.course.id'},
402: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
403: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
404: my %storenewentry=($symb => time);
405: $status.='<br>Updating discussion time: '.
406: &Apache::lonnet::put('discussiontimes',\%storenewentry,
407: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
408: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
409: }
410: my %record=&Apache::lonnet::restore('_discussion');
411: my ($temp)=keys %record;
412: unless ($temp=~/^error\:/) {
413: my %newrecord=();
414: $newrecord{'resource'}=$symb;
415: $newrecord{'subnumber'}=$record{'subnumber'}+1;
416: $status.='<br>Registering: '.
417: &Apache::lonnet::cstore(\%newrecord,'_discussion');
418: }
419: } else {
420: $status.='Failed.';
421: }
422: return $status.'<br>';
423: }
424:
425: # ----------------------------------------------------------- Preview function
426:
427: sub show_preview {
428: my $r=shift;
429: my $message=&clear_out_html($ENV{'form.comment'});
430: $message=~s/\n/\<br \/\>/g;
431: $message=&Apache::lontexconvert::msgtexconverted($message);
432: $r->print('<table border="2"><tr><td>'.
433: $message.'</td></tr></table>');
434: }
435:
436: sub generate_preview_button {
437: return(<<ENDPREVIEW);
438: <form name="preview" action="/adm/feedback?preview=1" method="post" target="preview">
439: <input type="hidden" name="comment" />
440: <input type="button" value="Show Preview"
441: onClick="this.form.comment.value=document.mailform.comment.value;this.form.submit();" />
442: </form>
443: ENDPREVIEW
444: }
445: sub handler {
446: my $r = shift;
447: if ($r->header_only) {
448: $r->content_type('text/html');
449: $r->send_http_header;
450: return OK;
451: }
452:
453: # --------------------------- Get query string for limited number of parameters
454:
455: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
456: ['hide','unhide','deldisc','postdata','preview']);
457:
458: if (($ENV{'form.hide'}) || ($ENV{'form.unhide'})) {
459: # ----------------------------------------------------------------- Hide/unhide
460: $r->content_type('text/html');
461: $r->send_http_header;
462:
463: my $entry=$ENV{'form.hide'}?$ENV{'form.hide'}:$ENV{'form.unhide'};
464:
465: my ($symb,$idx)=split(/\:\:\:/,$entry);
466: my ($map,$ind,$url)=split(/\_\_\_/,$symb);
467:
468: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
469: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
470: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
471:
472:
473: my $currenthidden=$contrib{'hidden'};
474:
475: if ($ENV{'form.hide'}) {
476: $currenthidden.='.'.$idx.'.';
477: } else {
478: $currenthidden=~s/\.$idx\.//g;
479: }
480: my %newhash=('hidden' => $currenthidden);
481:
482: &Apache::lonnet::store(\%newhash,$symb,$ENV{'request.course.id'},
483: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
484: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
485:
486: &redirect_back($r,&Apache::lonnet::clutter($url),
487: 'Changed discussion status<p>','0','0');
488: } elsif ($ENV{'form.deldisc'}) {
489: # --------------------------------------------------------------- Hide for good
490: $r->content_type('text/html');
491: $r->send_http_header;
492:
493: my $entry=$ENV{'form.deldisc'};
494:
495: my ($symb,$idx)=split(/\:\:\:/,$entry);
496: my ($map,$ind,$url)=split(/\_\_\_/,$symb);
497:
498: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
499: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
500: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
501:
502:
503: my $currentdeleted=$contrib{'deleted'};
504:
505: $currentdeleted.='.'.$idx.'.';
506:
507: my %newhash=('deleted' => $currentdeleted);
508:
509: &Apache::lonnet::store(\%newhash,$symb,$ENV{'request.course.id'},
510: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
511: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
512:
513: &redirect_back($r,&Apache::lonnet::clutter($url),
514: 'Changed discussion status<p>','0','0');
515: } elsif ($ENV{'form.preview'}) {
516: # -------------------------------------------------------- User wants a preview
517: &show_preview($r);
518: } else {
519: # ------------------------------------------------------------- Normal feedback
520: my $feedurl=$ENV{'form.postdata'};
521: $feedurl=~s/^http\:\/\///;
522: $feedurl=~s/^$ENV{'SERVER_NAME'}//;
523: $feedurl=~s/^$ENV{'HTTP_HOST'}//;
524:
525: my $symb=&Apache::lonnet::symbread($feedurl);
526: unless ($symb) {
527: $symb=$ENV{'form.symb'};
528: if ($symb) {
529: my ($map,$id,$url)=split(/\_\_\_/,$symb);
530: $feedurl=&Apache::lonnet::clutter($url);
531: }
532: }
533: my $goahead=1;
534: if ($feedurl=~/\.(problem|exam|quiz|assess|survey|form)$/) {
535: unless ($symb) { $goahead=0; }
536: }
537:
538: if ($goahead) {
539: # Go ahead with feedback, no ambiguous reference
540: $r->content_type('text/html');
541: $r->send_http_header;
542:
543: if (
544: (
545: ($feedurl=~m:^/res:) && ($feedurl!~m:^/res/adm:)
546: )
547: ||
548: ($ENV{'request.course.id'} && ($feedurl!~m:^/adm:))
549: ||
550: ($ENV{'request.course.id'} && ($symb=~/^bulletin\_\_\_/))
551: ) {
552: # --------------------------------------------------- Print login screen header
553: unless ($ENV{'form.sendit'}) {
554: my $options=&screen_header($feedurl);
555: if ($options) {
556: &mail_screen($r,$feedurl,$options);
557: } else {
558: &fail_redirect($r,$feedurl);
559: }
560: } else {
561:
562: # Get previous user input
563: my $prevattempts=&Apache::loncommon::get_previous_attempt(
564: $symb,$ENV{'user.name'},$ENV{'user.domain'},
565: $ENV{'request.course.id'});
566:
567: # Get output from resource
568: my $usersaw=&resource_output($feedurl);
569:
570: # Get resource answer
571: my $useranswer=&Apache::loncommon::get_student_answers(
572: $symb,$ENV{'user.name'},$ENV{'user.domain'},
573: $ENV{'request.course.id'});
574: # Get attachments, if any, and not too large
575: my $attachmenturl='';
576: if ($ENV{'form.attachment.filename'}) {
577: unless (length($ENV{'form.attachment'})>131072) {
578: $attachmenturl=&Apache::lonnet::userfileupload('attachment');
579: }
580: }
581: # Filter HTML out of message (could be nasty)
582: my $message=&clear_out_html($ENV{'form.comment'});
583:
584: # Assemble email
585: my ($email,$citations)=&assemble_email($feedurl,$message,$prevattempts,
586: $usersaw,$useranswer);
587:
588: # Who gets this?
589: my ($typestyle,%to) = &decide_receiver($feedurl);
590:
591: # Actually send mail
592: my ($status,$numsent)=&send_msg($feedurl,$email,$citations,
593: $attachmenturl,%to);
594:
595: # Discussion? Store that.
596:
597: my $numpost=0;
598: if ($ENV{'form.discuss'}) {
599: $typestyle.=&adddiscuss($symb,$message,0,$attachmenturl);
600: $numpost++;
601: }
602:
603: if ($ENV{'form.anondiscuss'}) {
604: $typestyle.=&adddiscuss($symb,$message,1,$attachmenturl);
605: $numpost++;
606: }
607:
608:
609: # Receipt screen and redirect back to where came from
610: &redirect_back($r,$feedurl,$typestyle,$numsent,$numpost,$status);
611:
612: }
613: } else {
614: # Unable to give feedback
615: &no_redirect_back($r,$feedurl);
616: }
617: } else {
618: # Ambiguous Problem Resource
619: $r->internal_redirect('/adm/ambiguous');
620: }
621: }
622: return OK;
623: }
624:
625: 1;
626: __END__
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