1: # The LearningOnline Network
2: # Feedback
3: #
4: # $Id: lonfeedback.pm,v 1.38 2002/12/26 16:40:33 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: <input type=hidden name=sendit value=1>
116: <input type=button value="Send Feedback" onClick='gosubmit();'></input>
117: </form>
118: ENDDOCUMENT
119: $r->print(&generate_preview_button().'</body></html>');
120: }
121:
122: sub fail_redirect {
123: my ($r,$feedurl) = @_;
124: $r->print (<<ENDFAILREDIR);
125: <head><title>Feedback not sent</title>
126: <meta http-equiv="pragma" content="no-cache"></meta>
127: <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
128: </head>
129: <html>
130: <body bgcolor="#FFFFFF">
131: <img align=right src=/adm/lonIcons/lonlogos.gif>
132: <b>Sorry, no recipients ...</b>
133: </body>
134: </html>
135: ENDFAILREDIR
136: }
137:
138: sub redirect_back {
139: my ($r,$feedurl,$typestyle,$sendsomething,$sendposts,$status) = @_;
140: $r->print (<<ENDREDIR);
141: <head>
142: <title>Feedback sent</title>
143: <meta http-equiv="pragma" content="no-cache"></meta>
144: <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
145: </head>
146: <html>
147: <body bgcolor="#FFFFFF">
148: <img align=right src=/adm/lonIcons/lonlogos.gif>
149: $typestyle
150: <b>Sent $sendsomething message(s), and $sendposts post(s).</b>
151: <font color=red>$status</font>
152: </body>
153: </html>
154: ENDREDIR
155: }
156:
157: sub no_redirect_back {
158: my ($r,$feedurl) = @_;
159: $r->print (<<ENDNOREDIR);
160: <head><title>Feedback not sent</title>
161: <meta http-equiv="pragma" content="no-cache"></meta>
162: ENDNOREDIR
163:
164: if ($feedurl!~/^\/adm\/feedback/) {
165: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2; url='.$feedurl.'">');
166: }
167:
168: $r->print (<<ENDNOREDIRTWO);
169: </head>
170: <html>
171: <body bgcolor="#FFFFFF">
172: <img align=right src=/adm/lonIcons/lonlogos.gif>
173: <b>Sorry, no feedback possible on this resource ...</b>
174: </body>
175: </html>
176: ENDNOREDIRTWO
177: }
178:
179: sub screen_header {
180: my ($feedurl) = @_;
181: my $options='';
182: if (($feedurl=~/^\/res\//) && ($feedurl!~/^\/res\/adm/)) {
183: $options=
184: '<p><input type=checkbox name=author> Feedback to resource author';
185: }
186: if (&feedback_available(1)) {
187: $options.=
188: '<br><input type=checkbox name=question> Question about resource content';
189: }
190: if (&feedback_available(0,1)) {
191: $options.=
192: '<br><input type=checkbox name=course> '.
193: 'Question/Comment/Feedback about course content';
194: }
195: if (&feedback_available(0,0,1)) {
196: $options.=
197: '<br><input type=checkbox name=policy> '.
198: 'Question/Comment/Feedback about course policy';
199: }
200:
201: if ($ENV{'request.course.id'}) {
202: if (&Apache::lonnet::allowed('pch',
203: $ENV{'request.course.id'}.
204: ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
205: $options.='<br><input type=checkbox name=discuss> '.
206: '<b>Contribution to course discussion of resource</b>';
207: $options.='<br><input type=checkbox name=anondiscuss> '.
208: '<b>Anonymous contribution to course discussion of resource</b>'.
209: ' (name only visible to course faculty)';
210: }
211: }
212: return $options;
213: }
214:
215: sub resource_output {
216: my ($feedurl) = @_;
217: my $usersaw=&Apache::lonnet::ssi($feedurl);
218: $usersaw=~s/\<body[^\>]*\>//gi;
219: $usersaw=~s/\<\/body\>//gi;
220: $usersaw=~s/\<html\>//gi;
221: $usersaw=~s/\<\/html\>//gi;
222: $usersaw=~s/\<head\>//gi;
223: $usersaw=~s/\<\/head\>//gi;
224: $usersaw=~s/action\s*\=/would_be_action\=/gi;
225: return $usersaw;
226: }
227:
228: sub clear_out_html {
229: my $message=$ENV{'form.comment'};
230: my $cid=$ENV{'request.course.id'};
231: if ($ENV{"course.$cid.allow_limited_html_in_feedback"} =~ m/yes/i) {
232: # allows <B> <I> <P> <A> <LI> <OL> <UL> <EM> <BR> <TT> <STRONG>
233: # <BLOCKQUOTE> <DIV .*> <DIV> <IMG>
234: my %html=(B=>1, I=>1, P=>1, A=>1, LI=>1, OL=>1, UL=>1, EM=>1,
235: BR=>1, TT=>1, STRONG=>1, BLOCKQUOTE=>1, DIV=>1, IMG=>1);
236:
237: $message =~ s/\<(\/?\s*(\w+)[^\>\<]*)/
238: {($html{uc($2)}&(length($1)<1000))?"\<$1":"\<$1"}/ge;
239: $message =~ s/(\<?\s*(\w+)[^\<\>]*)\>/
240: {($html{uc($2)}&(length($1)<1000))?"$1\>":"$1\>"}/ge;
241: } else {
242: $message=~s/\<\/*m\s*\>//g;
243: $message=~s/\</\<\;/g;
244: $message=~s/\>/\>\;/g;
245: }
246: return $message;
247: }
248:
249: sub assemble_email {
250: my ($feedurl,$message,$prevattempts,$usersaw)=@_;
251: my $email=<<"ENDEMAIL";
252: Refers to <a href="$feedurl">$feedurl</a>
253:
254: $message
255: ENDEMAIL
256: my $citations=<<"ENDCITE";
257: <h2>Previous attempts of student (if applicable)</h2>
258: $prevattempts
259: <p><hr>
260: <h2>Original screen output (if applicable)</h2>
261: $usersaw
262: ENDCITE
263: return ($email,$citations);
264: }
265:
266: sub secapply {
267: my $rec=shift;
268: my $defaultflag=shift;
269: $rec=~s/\s+//g;
270: $rec=~s/\@/\:/g;
271: my ($adr,$sections)=($rec=~/^([^\(]+)\(([^\)]+)\)/);
272: if ($sections) {
273: foreach (split(/\;/,$sections)) {
274: if (($_ eq $ENV{'request.course.sec'}) ||
275: ($defaultflag && ($_ eq '*'))) {
276: return $adr;
277: }
278: }
279: } else {
280: return $rec;
281: }
282: return '';
283: }
284:
285: sub decide_receiver {
286: my ($feedurl,$author,$question,$course,$policy,$defaultflag) = @_;
287: my $typestyle='';
288: my %to=();
289: if ($ENV{'form.author'}||$author) {
290: $typestyle.='Submitting as Author Feedback<br>';
291: $feedurl=~/^\/res\/(\w+)\/(\w+)\//;
292: $to{$2.':'.$1}=1;
293: }
294: if ($ENV{'form.question'}||$question) {
295: $typestyle.='Submitting as Question<br>';
296: foreach (split(/\,/,
297: $ENV{'course.'.$ENV{'request.course.id'}.'.question.email'})
298: ) {
299: my $rec=&secapply($_,$defaultflag);
300: if ($rec) { $to{$rec}=1; }
301: }
302: }
303: if ($ENV{'form.course'}||$course) {
304: $typestyle.='Submitting as Comment<br>';
305: foreach (split(/\,/,
306: $ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'})
307: ) {
308: my $rec=&secapply($_,$defaultflag);
309: if ($rec) { $to{$rec}=1; }
310: }
311: }
312: if ($ENV{'form.policy'}||$policy) {
313: $typestyle.='Submitting as Policy Feedback<br>';
314: foreach (split(/\,/,
315: $ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'})
316: ) {
317: my $rec=&secapply($_,$defaultflag);
318: if ($rec) { $to{$rec}=1; }
319: }
320: }
321: if ((scalar(%to) eq '0') && (!$defaultflag)) {
322: ($typestyle,%to)=
323: &decide_receiver($feedurl,$author,$question,$course,$policy,1);
324: }
325: return ($typestyle,%to);
326: }
327:
328: sub feedback_available {
329: my ($question,$course,$policy)=@_;
330: my ($typestyle,%to)=&decide_receiver('',0,$question,$course,$policy);
331: return scalar(%to);
332: }
333:
334: sub send_msg {
335: my ($feedurl,$email,$citations,%to)=@_;
336: my $status='';
337: my $sendsomething=0;
338: foreach (keys %to) {
339: if ($_) {
340: my $declutter=&Apache::lonnet::declutter($feedurl);
341: unless (&Apache::lonmsg::user_normal_msg(split(/\:/,$_),
342: 'Feedback ['.$declutter.']',$email,$citations)=~/ok/) {
343: $status.='<br>Error sending message to '.$_.'<br>';
344: } else {
345: $sendsomething++;
346: }
347: }
348: }
349:
350: my %record=&Apache::lonnet::restore('_feedback');
351: my ($temp)=keys %record;
352: unless ($temp=~/^error\:/) {
353: my %newrecord=();
354: $newrecord{'resource'}=$feedurl;
355: $newrecord{'subnumber'}=$record{'subnumber'}+1;
356: unless (&Apache::lonnet::cstore(\%newrecord,'_feedback') eq 'ok') {
357: $status.='<br>Not registered<br>';
358: }
359: }
360:
361: return ($status,$sendsomething);
362: }
363:
364: sub adddiscuss {
365: my ($symb,$email,$anon)=@_;
366: my $status='';
367: if (&Apache::lonnet::allowed('pch',$ENV{'request.course.id'}.
368: ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
369:
370: my %contrib=('message' => $email,
371: 'sendername' => $ENV{'user.name'},
372: 'senderdomain' => $ENV{'user.domain'},
373: 'screenname' => $ENV{'environment.screenname'},
374: 'plainname' => $ENV{'environment.firstname'}.' '.
375: $ENV{'environment.middlename'}.' '.
376: $ENV{'environment.lastname'}.' '.
377: $ENV{'enrironment.generation'});
378: if ($anon) {
379: $contrib{'anonymous'}='true';
380: }
381: if (($symb) && ($email)) {
382: $status='Adding to class discussion'.($anon?' (anonymous)':'').': '.
383: &Apache::lonnet::store(\%contrib,$symb,$ENV{'request.course.id'},
384: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
385: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
386: my %storenewentry=($symb => time);
387: $status.='<br>Updating discussion time: '.
388: &Apache::lonnet::put('discussiontimes',\%storenewentry,
389: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
390: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
391: }
392: my %record=&Apache::lonnet::restore('_discussion');
393: my ($temp)=keys %record;
394: unless ($temp=~/^error\:/) {
395: my %newrecord=();
396: $newrecord{'resource'}=$symb;
397: $newrecord{'subnumber'}=$record{'subnumber'}+1;
398: $status.='<br>Registering: '.
399: &Apache::lonnet::cstore(\%newrecord,'_discussion');
400: }
401: } else {
402: $status.='Failed.';
403: }
404: return $status.'<br>';
405: }
406:
407: # ----------------------------------------------------------- Preview function
408:
409: sub show_preview {
410: my $r=shift;
411: my $message=&clear_out_html($ENV{'form.comment'});
412: $message=~s/\n/\<br \/\>/g;
413: $message=&Apache::lontexconvert::msgtexconverted($message);
414: $r->print('<table border="2"><tr><td>'.
415: $message.'</td></tr></table>');
416: }
417:
418: sub generate_preview_button {
419: return(<<ENDPREVIEW);
420: <form name="preview" action="/adm/feedback?preview=1" method="post" target="preview">
421: <input type="hidden" name="comment" />
422: <input type="button" value="Show Preview"
423: onClick="this.form.comment.value=document.mailform.comment.value;this.form.submit();" />
424: </form>
425: ENDPREVIEW
426: }
427: sub handler {
428: my $r = shift;
429: if ($r->header_only) {
430: $r->content_type('text/html');
431: $r->send_http_header;
432: return OK;
433: }
434:
435: # --------------------------- Get query string for limited number of parameters
436:
437: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
438: ['hide','unhide','deldisc','postdata','preview']);
439:
440: if (($ENV{'form.hide'}) || ($ENV{'form.unhide'})) {
441: # ----------------------------------------------------------------- Hide/unhide
442: $r->content_type('text/html');
443: $r->send_http_header;
444:
445: my $entry=$ENV{'form.hide'}?$ENV{'form.hide'}:$ENV{'form.unhide'};
446:
447: my ($symb,$idx)=split(/\:\:\:/,$entry);
448: my ($map,$ind,$url)=split(/\_\_\_/,$symb);
449:
450: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
451: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
452: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
453:
454:
455: my $currenthidden=$contrib{'hidden'};
456:
457: if ($ENV{'form.hide'}) {
458: $currenthidden.='.'.$idx.'.';
459: } else {
460: $currenthidden=~s/\.$idx\.//g;
461: }
462: my %newhash=('hidden' => $currenthidden);
463:
464: &Apache::lonnet::store(\%newhash,$symb,$ENV{'request.course.id'},
465: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
466: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
467:
468: &redirect_back($r,&Apache::lonnet::clutter($url),
469: 'Changed discussion status<p>','0','0');
470: } elsif ($ENV{'form.deldisc'}) {
471: # --------------------------------------------------------------- Hide for good
472: $r->content_type('text/html');
473: $r->send_http_header;
474:
475: my $entry=$ENV{'form.deldisc'};
476:
477: my ($symb,$idx)=split(/\:\:\:/,$entry);
478: my ($map,$ind,$url)=split(/\_\_\_/,$symb);
479:
480: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
481: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
482: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
483:
484:
485: my $currentdeleted=$contrib{'deleted'};
486:
487: $currentdeleted.='.'.$idx.'.';
488:
489: my %newhash=('deleted' => $currentdeleted);
490:
491: &Apache::lonnet::store(\%newhash,$symb,$ENV{'request.course.id'},
492: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
493: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
494:
495: &redirect_back($r,&Apache::lonnet::clutter($url),
496: 'Changed discussion status<p>','0','0');
497: } elsif ($ENV{'form.preview'}) {
498: # -------------------------------------------------------- User wants a preview
499: &show_preview($r);
500: } else {
501: # ------------------------------------------------------------- Normal feedback
502: my $feedurl=$ENV{'form.postdata'};
503: $feedurl=~s/^http\:\/\///;
504: $feedurl=~s/^$ENV{'SERVER_NAME'}//;
505: $feedurl=~s/^$ENV{'HTTP_HOST'}//;
506:
507: my $symb=&Apache::lonnet::symbread($feedurl);
508: unless ($symb) {
509: $symb=$ENV{'form.symb'};
510: if ($symb) {
511: my ($map,$id,$url)=split(/\_\_\_/,$symb);
512: $feedurl=&Apache::lonnet::clutter($url);
513: }
514: }
515: my $goahead=1;
516: if ($feedurl=~/\.(problem|exam|quiz|assess|survey|form)$/) {
517: unless ($symb) { $goahead=0; }
518: }
519:
520: if ($goahead) {
521: # Go ahead with feedback, no ambiguous reference
522: $r->content_type('text/html');
523: $r->send_http_header;
524:
525: if (
526: (
527: ($feedurl=~m:^/res:) && ($feedurl!~m:^/res/adm:)
528: )
529: ||
530: ($ENV{'request.course.id'} && ($feedurl!~m:^/adm:))
531: ||
532: ($ENV{'request.course.id'} && ($symb=~/^bulletin\_\_\_/))
533: ) {
534: # --------------------------------------------------- Print login screen header
535: unless ($ENV{'form.sendit'}) {
536: my $options=&screen_header($feedurl);
537: if ($options) {
538: &mail_screen($r,$feedurl,$options);
539: } else {
540: &fail_redirect($r,$feedurl);
541: }
542: } else {
543:
544: # Get previous user input
545: my $prevattempts=&Apache::loncommon::get_previous_attempt(
546: $symb,$ENV{'user.name'},$ENV{'user.domain'},
547: $ENV{'request.course.id'});
548:
549: # Get output from resource
550: my $usersaw=&resource_output($feedurl);
551:
552: # Filter HTML out of message (could be nasty)
553: my $message=&clear_out_html;
554:
555: # Assemble email
556: my ($email,$citations)=&assemble_email($feedurl,$message,$prevattempts,
557: $usersaw);
558:
559: # Who gets this?
560: my ($typestyle,%to) = &decide_receiver($feedurl);
561:
562: # Actually send mail
563: my ($status,$numsent)=&send_msg($feedurl,$email,$citations,%to);
564:
565: # Discussion? Store that.
566:
567: my $numpost=0;
568: if ($ENV{'form.discuss'}) {
569: $typestyle.=&adddiscuss($symb,$message);
570: $numpost++;
571: }
572:
573: if ($ENV{'form.anondiscuss'}) {
574: $typestyle.=&adddiscuss($symb,$message,1);
575: $numpost++;
576: }
577:
578:
579: # Receipt screen and redirect back to where came from
580: &redirect_back($r,$feedurl,$typestyle,$numsent,$numpost,$status);
581:
582: }
583: } else {
584: # Unable to give feedback
585: &no_redirect_back($r,$feedurl);
586: }
587: } else {
588: # Ambiguous Problem Resource
589: $r->internal_redirect('/adm/ambiguous');
590: }
591: }
592: return OK;
593: }
594:
595: 1;
596: __END__
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