1: # The LearningOnline Network
2: # Feedback
3: #
4: # $Id: lonfeedback.pm,v 1.42 2003/03/29 22:50:22 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: $r->print(<<ENDDOCUMENT);
60: <html>
61: <head>
62: <title>The LearningOnline Network with CAPA</title>
63: <meta http-equiv="pragma" content="no-cache"></meta>
64: <script>
65: function gosubmit() {
66: var rec=0;
67: if (typeof(document.mailform.elements.author)!="undefined") {
68: if (document.mailform.elements.author.checked) {
69: rec=1;
70: }
71: }
72: if (typeof(document.mailform.elements.question)!="undefined") {
73: if (document.mailform.elements.question.checked) {
74: rec=1;
75: }
76: }
77: if (typeof(document.mailform.elements.course)!="undefined") {
78: if (document.mailform.elements.course.checked) {
79: rec=1;
80: }
81: }
82: if (typeof(document.mailform.elements.policy)!="undefined") {
83: if (document.mailform.elements.policy.checked) {
84: rec=1;
85: }
86: }
87: if (typeof(document.mailform.elements.discuss)!="undefined") {
88: if (document.mailform.elements.discuss.checked) {
89: rec=1;
90: }
91: }
92: if (typeof(document.mailform.elements.anondiscuss)!="undefined") {
93: if (document.mailform.elements.anondiscuss.checked) {
94: rec=1;
95: }
96: }
97:
98: if (rec) {
99: document.mailform.submit();
100: } else {
101: alert('Please check a feedback type.');
102: }
103: }
104: </script>
105: </head>
106: $bodytag
107: <h2><tt>$feedurl</tt></h2>
108: <form action="/adm/feedback" method=post name=mailform>
109: <input type=hidden name=postdata value="$feedurl">
110: Please check at least one of the following feedback types:
111: $options<hr>
112: My question/comment/feedback:<p>
113: <textarea name=comment cols=60 rows=10 wrap=hard>
114: </textarea><p>
115: Attachment (128 KB max size): <input type="file" name="attachment" />
116: </p>
117: <p>
118: <input type="hidden" name="sendit" value="1" />
119: <input type=button value="Send Feedback" onClick='gosubmit();' />
120: </p>
121: </form>
122: ENDDOCUMENT
123: $r->print(&generate_preview_button().'</body></html>');
124: }
125:
126: sub fail_redirect {
127: my ($r,$feedurl) = @_;
128: $r->print (<<ENDFAILREDIR);
129: <head><title>Feedback not sent</title>
130: <meta http-equiv="pragma" content="no-cache"></meta>
131: <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
132: </head>
133: <html>
134: <body bgcolor="#FFFFFF">
135: <img align=right src=/adm/lonIcons/lonlogos.gif>
136: <b>Sorry, no recipients ...</b>
137: </body>
138: </html>
139: ENDFAILREDIR
140: }
141:
142: sub redirect_back {
143: my ($r,$feedurl,$typestyle,$sendsomething,$sendposts,$status) = @_;
144: $r->print (<<ENDREDIR);
145: <head>
146: <title>Feedback sent</title>
147: <meta http-equiv="pragma" content="no-cache"></meta>
148: <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
149: </head>
150: <html>
151: <body bgcolor="#FFFFFF">
152: <img align=right src=/adm/lonIcons/lonlogos.gif>
153: $typestyle
154: <b>Sent $sendsomething message(s), and $sendposts post(s).</b>
155: <font color=red>$status</font>
156: </body>
157: </html>
158: ENDREDIR
159: }
160:
161: sub no_redirect_back {
162: my ($r,$feedurl) = @_;
163: $r->print (<<ENDNOREDIR);
164: <head><title>Feedback not sent</title>
165: <meta http-equiv="pragma" content="no-cache"></meta>
166: ENDNOREDIR
167:
168: if ($feedurl!~/^\/adm\/feedback/) {
169: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2; url='.$feedurl.'">');
170: }
171:
172: $r->print (<<ENDNOREDIRTWO);
173: </head>
174: <html>
175: <body bgcolor="#FFFFFF">
176: <img align=right src=/adm/lonIcons/lonlogos.gif>
177: <b>Sorry, no feedback possible on this resource ...</b>
178: </body>
179: </html>
180: ENDNOREDIRTWO
181: }
182:
183: sub screen_header {
184: my ($feedurl) = @_;
185: my $options='';
186: if (($feedurl=~/^\/res\//) && ($feedurl!~/^\/res\/adm/)) {
187: $options=
188: '<p><input type=checkbox name=author> Feedback to resource author';
189: }
190: if (&feedback_available(1)) {
191: $options.=
192: '<br><input type=checkbox name=question> Question about resource content';
193: }
194: if (&feedback_available(0,1)) {
195: $options.=
196: '<br><input type=checkbox name=course> '.
197: 'Question/Comment/Feedback about course content';
198: }
199: if (&feedback_available(0,0,1)) {
200: $options.=
201: '<br><input type=checkbox name=policy> '.
202: 'Question/Comment/Feedback about course policy';
203: }
204:
205: if ($ENV{'request.course.id'}) {
206: if (&Apache::lonnet::allowed('pch',
207: $ENV{'request.course.id'}.
208: ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
209: $options.='<br><input type=checkbox name=discuss> '.
210: '<b>Contribution to course discussion of resource</b>';
211: $options.='<br><input type=checkbox name=anondiscuss> '.
212: '<b>Anonymous contribution to course discussion of resource</b>'.
213: ' (name only visible to course faculty)';
214: }
215: }
216: return $options;
217: }
218:
219: sub resource_output {
220: my ($feedurl) = @_;
221: my $usersaw=&Apache::lonnet::ssi($feedurl);
222: $usersaw=~s/\<body[^\>]*\>//gi;
223: $usersaw=~s/\<\/body\>//gi;
224: $usersaw=~s/\<html\>//gi;
225: $usersaw=~s/\<\/html\>//gi;
226: $usersaw=~s/\<head\>//gi;
227: $usersaw=~s/\<\/head\>//gi;
228: $usersaw=~s/action\s*\=/would_be_action\=/gi;
229: return $usersaw;
230: }
231:
232: sub clear_out_html {
233: my ($message,$override)=@_;
234: my $cid=$ENV{'request.course.id'};
235: if (($ENV{"course.$cid.allow_limited_html_in_feedback"} =~ m/yes/i) ||
236: ($override)) {
237: # allows <B> <I> <P> <A> <LI> <OL> <UL> <EM> <BR> <TT> <STRONG>
238: # <BLOCKQUOTE> <DIV .*> <DIV> <IMG>
239: my %html=(B=>1, I=>1, P=>1, A=>1, LI=>1, OL=>1, UL=>1, EM=>1,
240: BR=>1, TT=>1, STRONG=>1, BLOCKQUOTE=>1, DIV=>1, IMG=>1);
241:
242: $message =~ s/\<(\/?\s*(\w+)[^\>\<]*)/
243: {($html{uc($2)}&(length($1)<1000))?"\<$1":"\<$1"}/ge;
244: $message =~ s/(\<?\s*(\w+)[^\<\>]*)\>/
245: {($html{uc($2)}&(length($1)<1000))?"$1\>":"$1\>"}/ge;
246: } else {
247: $message=~s/\<\/*m\s*\>//g;
248: $message=~s/\</\<\;/g;
249: $message=~s/\>/\>\;/g;
250: }
251: return $message;
252: }
253:
254: sub assemble_email {
255: my ($feedurl,$message,$prevattempts,$usersaw,$useranswer)=@_;
256: my $email=<<"ENDEMAIL";
257: Refers to <a href="$feedurl">$feedurl</a>
258:
259: $message
260: ENDEMAIL
261: my $citations=<<"ENDCITE";
262: <h2>Previous attempts of student (if applicable)</h2>
263: $prevattempts
264: <p><hr>
265: <h2>Original screen output (if applicable)</h2>
266: $usersaw
267: <h2>Correct Answer(s) (if applicable)</h2>
268: $useranswer
269: ENDCITE
270: return ($email,$citations);
271: }
272:
273: sub secapply {
274: my $rec=shift;
275: my $defaultflag=shift;
276: $rec=~s/\s+//g;
277: $rec=~s/\@/\:/g;
278: my ($adr,$sections)=($rec=~/^([^\(]+)\(([^\)]+)\)/);
279: if ($sections) {
280: foreach (split(/\;/,$sections)) {
281: if (($_ eq $ENV{'request.course.sec'}) ||
282: ($defaultflag && ($_ eq '*'))) {
283: return $adr;
284: }
285: }
286: } else {
287: return $rec;
288: }
289: return '';
290: }
291:
292: sub decide_receiver {
293: my ($feedurl,$author,$question,$course,$policy,$defaultflag) = @_;
294: my $typestyle='';
295: my %to=();
296: if ($ENV{'form.author'}||$author) {
297: $typestyle.='Submitting as Author Feedback<br>';
298: $feedurl=~/^\/res\/(\w+)\/(\w+)\//;
299: $to{$2.':'.$1}=1;
300: }
301: if ($ENV{'form.question'}||$question) {
302: $typestyle.='Submitting as Question<br>';
303: foreach (split(/\,/,
304: $ENV{'course.'.$ENV{'request.course.id'}.'.question.email'})
305: ) {
306: my $rec=&secapply($_,$defaultflag);
307: if ($rec) { $to{$rec}=1; }
308: }
309: }
310: if ($ENV{'form.course'}||$course) {
311: $typestyle.='Submitting as Comment<br>';
312: foreach (split(/\,/,
313: $ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'})
314: ) {
315: my $rec=&secapply($_,$defaultflag);
316: if ($rec) { $to{$rec}=1; }
317: }
318: }
319: if ($ENV{'form.policy'}||$policy) {
320: $typestyle.='Submitting as Policy Feedback<br>';
321: foreach (split(/\,/,
322: $ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'})
323: ) {
324: my $rec=&secapply($_,$defaultflag);
325: if ($rec) { $to{$rec}=1; }
326: }
327: }
328: if ((scalar(%to) eq '0') && (!$defaultflag)) {
329: ($typestyle,%to)=
330: &decide_receiver($feedurl,$author,$question,$course,$policy,1);
331: }
332: return ($typestyle,%to);
333: }
334:
335: sub feedback_available {
336: my ($question,$course,$policy)=@_;
337: my ($typestyle,%to)=&decide_receiver('',0,$question,$course,$policy);
338: return scalar(%to);
339: }
340:
341: sub send_msg {
342: my ($feedurl,$email,$citations,%to)=@_;
343: my $status='';
344: my $sendsomething=0;
345: foreach (keys %to) {
346: if ($_) {
347: my $declutter=&Apache::lonnet::declutter($feedurl);
348: unless (&Apache::lonmsg::user_normal_msg(split(/\:/,$_),
349: 'Feedback ['.$declutter.']',$email,$citations,$feedurl)=~/ok/) {
350: $status.='<br>Error sending message to '.$_.'<br>';
351: } else {
352: $sendsomething++;
353: }
354: }
355: }
356:
357: my %record=&Apache::lonnet::restore('_feedback');
358: my ($temp)=keys %record;
359: unless ($temp=~/^error\:/) {
360: my %newrecord=();
361: $newrecord{'resource'}=$feedurl;
362: $newrecord{'subnumber'}=$record{'subnumber'}+1;
363: unless (&Apache::lonnet::cstore(\%newrecord,'_feedback') eq 'ok') {
364: $status.='<br>Not registered<br>';
365: }
366: }
367:
368: return ($status,$sendsomething);
369: }
370:
371: sub adddiscuss {
372: my ($symb,$email,$anon,$attachmenturl)=@_;
373: my $status='';
374: if (&Apache::lonnet::allowed('pch',$ENV{'request.course.id'}.
375: ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
376:
377: my %contrib=('message' => $email,
378: 'sendername' => $ENV{'user.name'},
379: 'senderdomain' => $ENV{'user.domain'},
380: 'screenname' => $ENV{'environment.screenname'},
381: 'plainname' => $ENV{'environment.firstname'}.' '.
382: $ENV{'environment.middlename'}.' '.
383: $ENV{'environment.lastname'}.' '.
384: $ENV{'enrironment.generation'},
385: 'attachment' => $attachmenturl);
386: if ($anon) {
387: $contrib{'anonymous'}='true';
388: }
389: if (($symb) && ($email)) {
390: $status='Adding to class discussion'.($anon?' (anonymous)':'').': '.
391: &Apache::lonnet::store(\%contrib,$symb,$ENV{'request.course.id'},
392: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
393: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
394: my %storenewentry=($symb => time);
395: $status.='<br>Updating discussion time: '.
396: &Apache::lonnet::put('discussiontimes',\%storenewentry,
397: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
398: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
399: }
400: my %record=&Apache::lonnet::restore('_discussion');
401: my ($temp)=keys %record;
402: unless ($temp=~/^error\:/) {
403: my %newrecord=();
404: $newrecord{'resource'}=$symb;
405: $newrecord{'subnumber'}=$record{'subnumber'}+1;
406: $status.='<br>Registering: '.
407: &Apache::lonnet::cstore(\%newrecord,'_discussion');
408: }
409: } else {
410: $status.='Failed.';
411: }
412: return $status.'<br>';
413: }
414:
415: # ----------------------------------------------------------- Preview function
416:
417: sub show_preview {
418: my $r=shift;
419: my $message=&clear_out_html($ENV{'form.comment'});
420: $message=~s/\n/\<br \/\>/g;
421: $message=&Apache::lontexconvert::msgtexconverted($message);
422: $r->print('<table border="2"><tr><td>'.
423: $message.'</td></tr></table>');
424: }
425:
426: sub generate_preview_button {
427: return(<<ENDPREVIEW);
428: <form name="preview" action="/adm/feedback?preview=1" method="post" target="preview">
429: <input type="hidden" name="comment" />
430: <input type="button" value="Show Preview"
431: onClick="this.form.comment.value=document.mailform.comment.value;this.form.submit();" />
432: </form>
433: ENDPREVIEW
434: }
435: sub handler {
436: my $r = shift;
437: if ($r->header_only) {
438: $r->content_type('text/html');
439: $r->send_http_header;
440: return OK;
441: }
442:
443: # --------------------------- Get query string for limited number of parameters
444:
445: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
446: ['hide','unhide','deldisc','postdata','preview']);
447:
448: if (($ENV{'form.hide'}) || ($ENV{'form.unhide'})) {
449: # ----------------------------------------------------------------- Hide/unhide
450: $r->content_type('text/html');
451: $r->send_http_header;
452:
453: my $entry=$ENV{'form.hide'}?$ENV{'form.hide'}:$ENV{'form.unhide'};
454:
455: my ($symb,$idx)=split(/\:\:\:/,$entry);
456: my ($map,$ind,$url)=split(/\_\_\_/,$symb);
457:
458: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
459: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
460: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
461:
462:
463: my $currenthidden=$contrib{'hidden'};
464:
465: if ($ENV{'form.hide'}) {
466: $currenthidden.='.'.$idx.'.';
467: } else {
468: $currenthidden=~s/\.$idx\.//g;
469: }
470: my %newhash=('hidden' => $currenthidden);
471:
472: &Apache::lonnet::store(\%newhash,$symb,$ENV{'request.course.id'},
473: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
474: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
475:
476: &redirect_back($r,&Apache::lonnet::clutter($url),
477: 'Changed discussion status<p>','0','0');
478: } elsif ($ENV{'form.deldisc'}) {
479: # --------------------------------------------------------------- Hide for good
480: $r->content_type('text/html');
481: $r->send_http_header;
482:
483: my $entry=$ENV{'form.deldisc'};
484:
485: my ($symb,$idx)=split(/\:\:\:/,$entry);
486: my ($map,$ind,$url)=split(/\_\_\_/,$symb);
487:
488: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
489: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
490: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
491:
492:
493: my $currentdeleted=$contrib{'deleted'};
494:
495: $currentdeleted.='.'.$idx.'.';
496:
497: my %newhash=('deleted' => $currentdeleted);
498:
499: &Apache::lonnet::store(\%newhash,$symb,$ENV{'request.course.id'},
500: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
501: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
502:
503: &redirect_back($r,&Apache::lonnet::clutter($url),
504: 'Changed discussion status<p>','0','0');
505: } elsif ($ENV{'form.preview'}) {
506: # -------------------------------------------------------- User wants a preview
507: &show_preview($r);
508: } else {
509: # ------------------------------------------------------------- Normal feedback
510: my $feedurl=$ENV{'form.postdata'};
511: $feedurl=~s/^http\:\/\///;
512: $feedurl=~s/^$ENV{'SERVER_NAME'}//;
513: $feedurl=~s/^$ENV{'HTTP_HOST'}//;
514:
515: my $symb=&Apache::lonnet::symbread($feedurl);
516: unless ($symb) {
517: $symb=$ENV{'form.symb'};
518: if ($symb) {
519: my ($map,$id,$url)=split(/\_\_\_/,$symb);
520: $feedurl=&Apache::lonnet::clutter($url);
521: }
522: }
523: my $goahead=1;
524: if ($feedurl=~/\.(problem|exam|quiz|assess|survey|form)$/) {
525: unless ($symb) { $goahead=0; }
526: }
527:
528: if ($goahead) {
529: # Go ahead with feedback, no ambiguous reference
530: $r->content_type('text/html');
531: $r->send_http_header;
532:
533: if (
534: (
535: ($feedurl=~m:^/res:) && ($feedurl!~m:^/res/adm:)
536: )
537: ||
538: ($ENV{'request.course.id'} && ($feedurl!~m:^/adm:))
539: ||
540: ($ENV{'request.course.id'} && ($symb=~/^bulletin\_\_\_/))
541: ) {
542: # --------------------------------------------------- Print login screen header
543: unless ($ENV{'form.sendit'}) {
544: my $options=&screen_header($feedurl);
545: if ($options) {
546: &mail_screen($r,$feedurl,$options);
547: } else {
548: &fail_redirect($r,$feedurl);
549: }
550: } else {
551:
552: # Get previous user input
553: my $prevattempts=&Apache::loncommon::get_previous_attempt(
554: $symb,$ENV{'user.name'},$ENV{'user.domain'},
555: $ENV{'request.course.id'});
556:
557: # Get output from resource
558: my $usersaw=&resource_output($feedurl);
559:
560: # Get resource answer
561: my $useranswer=&Apache::loncommon::get_student_answers(
562: $symb,$ENV{'user.name'},$ENV{'user.domain'},
563: $ENV{'request.course.id'});
564: # Get attachments, if any, and not too large
565: my $attachmenturl='';
566: if ($ENV{'form.attachment.filename'}) {
567: unless (length($ENV{'form.attachment'})>131072) {
568: $attachmenturl=&Apache::lonnet::userfileupload('attachment',1);
569: }
570: }
571: # Filter HTML out of message (could be nasty)
572: my $message=&clear_out_html($ENV{'form.comment'});
573:
574: # Assemble email
575: my ($email,$citations)=&assemble_email($feedurl,$message,$prevattempts,
576: $usersaw,$useranswer);
577:
578: # Who gets this?
579: my ($typestyle,%to) = &decide_receiver($feedurl);
580:
581: # Actually send mail
582: my ($status,$numsent)=&send_msg($feedurl,$email,$citations,%to);
583:
584: # Discussion? Store that.
585:
586: my $numpost=0;
587: if ($ENV{'form.discuss'}) {
588: $typestyle.=&adddiscuss($symb,$message,0,$attachmenturl);
589: $numpost++;
590: }
591:
592: if ($ENV{'form.anondiscuss'}) {
593: $typestyle.=&adddiscuss($symb,$message,1,$attachmenturl);
594: $numpost++;
595: }
596:
597:
598: # Receipt screen and redirect back to where came from
599: &redirect_back($r,$feedurl,$typestyle,$numsent,$numpost,$status);
600:
601: }
602: } else {
603: # Unable to give feedback
604: &no_redirect_back($r,$feedurl);
605: }
606: } else {
607: # Ambiguous Problem Resource
608: $r->internal_redirect('/adm/ambiguous');
609: }
610: }
611: return OK;
612: }
613:
614: 1;
615: __END__
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