1: # The LearningOnline Network
2: # Feedback
3: #
4: # $Id: lonfeedback.pm,v 1.39 2003/02/10 16:22:28 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,$override)=@_;
230: my $cid=$ENV{'request.course.id'};
231: if (($ENV{"course.$cid.allow_limited_html_in_feedback"} =~ m/yes/i) ||
232: ($override)) {
233: # allows <B> <I> <P> <A> <LI> <OL> <UL> <EM> <BR> <TT> <STRONG>
234: # <BLOCKQUOTE> <DIV .*> <DIV> <IMG>
235: my %html=(B=>1, I=>1, P=>1, A=>1, LI=>1, OL=>1, UL=>1, EM=>1,
236: BR=>1, TT=>1, STRONG=>1, BLOCKQUOTE=>1, DIV=>1, IMG=>1);
237:
238: $message =~ s/\<(\/?\s*(\w+)[^\>\<]*)/
239: {($html{uc($2)}&(length($1)<1000))?"\<$1":"\<$1"}/ge;
240: $message =~ s/(\<?\s*(\w+)[^\<\>]*)\>/
241: {($html{uc($2)}&(length($1)<1000))?"$1\>":"$1\>"}/ge;
242: } else {
243: $message=~s/\<\/*m\s*\>//g;
244: $message=~s/\</\<\;/g;
245: $message=~s/\>/\>\;/g;
246: }
247: return $message;
248: }
249:
250: sub assemble_email {
251: my ($feedurl,$message,$prevattempts,$usersaw)=@_;
252: my $email=<<"ENDEMAIL";
253: Refers to <a href="$feedurl">$feedurl</a>
254:
255: $message
256: ENDEMAIL
257: my $citations=<<"ENDCITE";
258: <h2>Previous attempts of student (if applicable)</h2>
259: $prevattempts
260: <p><hr>
261: <h2>Original screen output (if applicable)</h2>
262: $usersaw
263: ENDCITE
264: return ($email,$citations);
265: }
266:
267: sub secapply {
268: my $rec=shift;
269: my $defaultflag=shift;
270: $rec=~s/\s+//g;
271: $rec=~s/\@/\:/g;
272: my ($adr,$sections)=($rec=~/^([^\(]+)\(([^\)]+)\)/);
273: if ($sections) {
274: foreach (split(/\;/,$sections)) {
275: if (($_ eq $ENV{'request.course.sec'}) ||
276: ($defaultflag && ($_ eq '*'))) {
277: return $adr;
278: }
279: }
280: } else {
281: return $rec;
282: }
283: return '';
284: }
285:
286: sub decide_receiver {
287: my ($feedurl,$author,$question,$course,$policy,$defaultflag) = @_;
288: my $typestyle='';
289: my %to=();
290: if ($ENV{'form.author'}||$author) {
291: $typestyle.='Submitting as Author Feedback<br>';
292: $feedurl=~/^\/res\/(\w+)\/(\w+)\//;
293: $to{$2.':'.$1}=1;
294: }
295: if ($ENV{'form.question'}||$question) {
296: $typestyle.='Submitting as Question<br>';
297: foreach (split(/\,/,
298: $ENV{'course.'.$ENV{'request.course.id'}.'.question.email'})
299: ) {
300: my $rec=&secapply($_,$defaultflag);
301: if ($rec) { $to{$rec}=1; }
302: }
303: }
304: if ($ENV{'form.course'}||$course) {
305: $typestyle.='Submitting as Comment<br>';
306: foreach (split(/\,/,
307: $ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'})
308: ) {
309: my $rec=&secapply($_,$defaultflag);
310: if ($rec) { $to{$rec}=1; }
311: }
312: }
313: if ($ENV{'form.policy'}||$policy) {
314: $typestyle.='Submitting as Policy Feedback<br>';
315: foreach (split(/\,/,
316: $ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'})
317: ) {
318: my $rec=&secapply($_,$defaultflag);
319: if ($rec) { $to{$rec}=1; }
320: }
321: }
322: if ((scalar(%to) eq '0') && (!$defaultflag)) {
323: ($typestyle,%to)=
324: &decide_receiver($feedurl,$author,$question,$course,$policy,1);
325: }
326: return ($typestyle,%to);
327: }
328:
329: sub feedback_available {
330: my ($question,$course,$policy)=@_;
331: my ($typestyle,%to)=&decide_receiver('',0,$question,$course,$policy);
332: return scalar(%to);
333: }
334:
335: sub send_msg {
336: my ($feedurl,$email,$citations,%to)=@_;
337: my $status='';
338: my $sendsomething=0;
339: foreach (keys %to) {
340: if ($_) {
341: my $declutter=&Apache::lonnet::declutter($feedurl);
342: unless (&Apache::lonmsg::user_normal_msg(split(/\:/,$_),
343: 'Feedback ['.$declutter.']',$email,$citations)=~/ok/) {
344: $status.='<br>Error sending message to '.$_.'<br>';
345: } else {
346: $sendsomething++;
347: }
348: }
349: }
350:
351: my %record=&Apache::lonnet::restore('_feedback');
352: my ($temp)=keys %record;
353: unless ($temp=~/^error\:/) {
354: my %newrecord=();
355: $newrecord{'resource'}=$feedurl;
356: $newrecord{'subnumber'}=$record{'subnumber'}+1;
357: unless (&Apache::lonnet::cstore(\%newrecord,'_feedback') eq 'ok') {
358: $status.='<br>Not registered<br>';
359: }
360: }
361:
362: return ($status,$sendsomething);
363: }
364:
365: sub adddiscuss {
366: my ($symb,$email,$anon)=@_;
367: my $status='';
368: if (&Apache::lonnet::allowed('pch',$ENV{'request.course.id'}.
369: ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
370:
371: my %contrib=('message' => $email,
372: 'sendername' => $ENV{'user.name'},
373: 'senderdomain' => $ENV{'user.domain'},
374: 'screenname' => $ENV{'environment.screenname'},
375: 'plainname' => $ENV{'environment.firstname'}.' '.
376: $ENV{'environment.middlename'}.' '.
377: $ENV{'environment.lastname'}.' '.
378: $ENV{'enrironment.generation'});
379: if ($anon) {
380: $contrib{'anonymous'}='true';
381: }
382: if (($symb) && ($email)) {
383: $status='Adding to class discussion'.($anon?' (anonymous)':'').': '.
384: &Apache::lonnet::store(\%contrib,$symb,$ENV{'request.course.id'},
385: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
386: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
387: my %storenewentry=($symb => time);
388: $status.='<br>Updating discussion time: '.
389: &Apache::lonnet::put('discussiontimes',\%storenewentry,
390: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
391: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
392: }
393: my %record=&Apache::lonnet::restore('_discussion');
394: my ($temp)=keys %record;
395: unless ($temp=~/^error\:/) {
396: my %newrecord=();
397: $newrecord{'resource'}=$symb;
398: $newrecord{'subnumber'}=$record{'subnumber'}+1;
399: $status.='<br>Registering: '.
400: &Apache::lonnet::cstore(\%newrecord,'_discussion');
401: }
402: } else {
403: $status.='Failed.';
404: }
405: return $status.'<br>';
406: }
407:
408: # ----------------------------------------------------------- Preview function
409:
410: sub show_preview {
411: my $r=shift;
412: my $message=&clear_out_html($ENV{'form.comment'});
413: $message=~s/\n/\<br \/\>/g;
414: $message=&Apache::lontexconvert::msgtexconverted($message);
415: $r->print('<table border="2"><tr><td>'.
416: $message.'</td></tr></table>');
417: }
418:
419: sub generate_preview_button {
420: return(<<ENDPREVIEW);
421: <form name="preview" action="/adm/feedback?preview=1" method="post" target="preview">
422: <input type="hidden" name="comment" />
423: <input type="button" value="Show Preview"
424: onClick="this.form.comment.value=document.mailform.comment.value;this.form.submit();" />
425: </form>
426: ENDPREVIEW
427: }
428: sub handler {
429: my $r = shift;
430: if ($r->header_only) {
431: $r->content_type('text/html');
432: $r->send_http_header;
433: return OK;
434: }
435:
436: # --------------------------- Get query string for limited number of parameters
437:
438: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
439: ['hide','unhide','deldisc','postdata','preview']);
440:
441: if (($ENV{'form.hide'}) || ($ENV{'form.unhide'})) {
442: # ----------------------------------------------------------------- Hide/unhide
443: $r->content_type('text/html');
444: $r->send_http_header;
445:
446: my $entry=$ENV{'form.hide'}?$ENV{'form.hide'}:$ENV{'form.unhide'};
447:
448: my ($symb,$idx)=split(/\:\:\:/,$entry);
449: my ($map,$ind,$url)=split(/\_\_\_/,$symb);
450:
451: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
452: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
453: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
454:
455:
456: my $currenthidden=$contrib{'hidden'};
457:
458: if ($ENV{'form.hide'}) {
459: $currenthidden.='.'.$idx.'.';
460: } else {
461: $currenthidden=~s/\.$idx\.//g;
462: }
463: my %newhash=('hidden' => $currenthidden);
464:
465: &Apache::lonnet::store(\%newhash,$symb,$ENV{'request.course.id'},
466: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
467: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
468:
469: &redirect_back($r,&Apache::lonnet::clutter($url),
470: 'Changed discussion status<p>','0','0');
471: } elsif ($ENV{'form.deldisc'}) {
472: # --------------------------------------------------------------- Hide for good
473: $r->content_type('text/html');
474: $r->send_http_header;
475:
476: my $entry=$ENV{'form.deldisc'};
477:
478: my ($symb,$idx)=split(/\:\:\:/,$entry);
479: my ($map,$ind,$url)=split(/\_\_\_/,$symb);
480:
481: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
482: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
483: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
484:
485:
486: my $currentdeleted=$contrib{'deleted'};
487:
488: $currentdeleted.='.'.$idx.'.';
489:
490: my %newhash=('deleted' => $currentdeleted);
491:
492: &Apache::lonnet::store(\%newhash,$symb,$ENV{'request.course.id'},
493: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
494: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
495:
496: &redirect_back($r,&Apache::lonnet::clutter($url),
497: 'Changed discussion status<p>','0','0');
498: } elsif ($ENV{'form.preview'}) {
499: # -------------------------------------------------------- User wants a preview
500: &show_preview($r);
501: } else {
502: # ------------------------------------------------------------- Normal feedback
503: my $feedurl=$ENV{'form.postdata'};
504: $feedurl=~s/^http\:\/\///;
505: $feedurl=~s/^$ENV{'SERVER_NAME'}//;
506: $feedurl=~s/^$ENV{'HTTP_HOST'}//;
507:
508: my $symb=&Apache::lonnet::symbread($feedurl);
509: unless ($symb) {
510: $symb=$ENV{'form.symb'};
511: if ($symb) {
512: my ($map,$id,$url)=split(/\_\_\_/,$symb);
513: $feedurl=&Apache::lonnet::clutter($url);
514: }
515: }
516: my $goahead=1;
517: if ($feedurl=~/\.(problem|exam|quiz|assess|survey|form)$/) {
518: unless ($symb) { $goahead=0; }
519: }
520:
521: if ($goahead) {
522: # Go ahead with feedback, no ambiguous reference
523: $r->content_type('text/html');
524: $r->send_http_header;
525:
526: if (
527: (
528: ($feedurl=~m:^/res:) && ($feedurl!~m:^/res/adm:)
529: )
530: ||
531: ($ENV{'request.course.id'} && ($feedurl!~m:^/adm:))
532: ||
533: ($ENV{'request.course.id'} && ($symb=~/^bulletin\_\_\_/))
534: ) {
535: # --------------------------------------------------- Print login screen header
536: unless ($ENV{'form.sendit'}) {
537: my $options=&screen_header($feedurl);
538: if ($options) {
539: &mail_screen($r,$feedurl,$options);
540: } else {
541: &fail_redirect($r,$feedurl);
542: }
543: } else {
544:
545: # Get previous user input
546: my $prevattempts=&Apache::loncommon::get_previous_attempt(
547: $symb,$ENV{'user.name'},$ENV{'user.domain'},
548: $ENV{'request.course.id'});
549:
550: # Get output from resource
551: my $usersaw=&resource_output($feedurl);
552:
553: # Filter HTML out of message (could be nasty)
554: my $message=&clear_out_html($ENV{'form.comment'});
555:
556: # Assemble email
557: my ($email,$citations)=&assemble_email($feedurl,$message,$prevattempts,
558: $usersaw);
559:
560: # Who gets this?
561: my ($typestyle,%to) = &decide_receiver($feedurl);
562:
563: # Actually send mail
564: my ($status,$numsent)=&send_msg($feedurl,$email,$citations,%to);
565:
566: # Discussion? Store that.
567:
568: my $numpost=0;
569: if ($ENV{'form.discuss'}) {
570: $typestyle.=&adddiscuss($symb,$message);
571: $numpost++;
572: }
573:
574: if ($ENV{'form.anondiscuss'}) {
575: $typestyle.=&adddiscuss($symb,$message,1);
576: $numpost++;
577: }
578:
579:
580: # Receipt screen and redirect back to where came from
581: &redirect_back($r,$feedurl,$typestyle,$numsent,$numpost,$status);
582:
583: }
584: } else {
585: # Unable to give feedback
586: &no_redirect_back($r,$feedurl);
587: }
588: } else {
589: # Ambiguous Problem Resource
590: $r->internal_redirect('/adm/ambiguous');
591: }
592: }
593: return OK;
594: }
595:
596: 1;
597: __END__
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