1: # The LearningOnline Network
2: # Feedback
3: #
4: # $Id: lonfeedback.pm,v 1.20 2001/12/27 18:37:32 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 Gerd Kortemeyer
43:
44:
45: package Apache::lonfeedback;
46:
47: use strict;
48: use Apache::Constants qw(:common);
49: use Apache::lonmsg();
50: use Apache::loncommon();
51:
52: sub mail_screen {
53: my ($r,$feedurl,$options) = @_;
54: $r->print(<<ENDDOCUMENT);
55: <html>
56: <head>
57: <title>The LearningOnline Network with CAPA</title>
58: <meta http-equiv="pragma" content="no-cache"></meta>
59: <script>
60: function gosubmit() {
61: var rec=0;
62: if (typeof(document.mailform.elements.author)!="undefined") {
63: if (document.mailform.elements.author.checked) {
64: rec=1;
65: }
66: }
67: if (typeof(document.mailform.elements.question)!="undefined") {
68: if (document.mailform.elements.question.checked) {
69: rec=1;
70: }
71: }
72: if (typeof(document.mailform.elements.course)!="undefined") {
73: if (document.mailform.elements.course.checked) {
74: rec=1;
75: }
76: }
77: if (typeof(document.mailform.elements.policy)!="undefined") {
78: if (document.mailform.elements.policy.checked) {
79: rec=1;
80: }
81: }
82: if (typeof(document.mailform.elements.discuss)!="undefined") {
83: if (document.mailform.elements.discuss.checked) {
84: rec=1;
85: }
86: }
87: if (typeof(document.mailform.elements.anondiscuss)!="undefined") {
88: if (document.mailform.elements.anondiscuss.checked) {
89: rec=1;
90: }
91: }
92:
93: if (rec) {
94: document.mailform.submit();
95: } else {
96: alert('Please check a feedback type.');
97: }
98: }
99: </script>
100: </head>
101: <body bgcolor="#FFFFFF" onLoad="window.focus();">
102: <img align=right src=/adm/lonIcons/lonlogos.gif>
103: <h1>Feedback</h1>
104: <h2><tt>$feedurl</tt></h2>
105: <form action="/adm/feedback" method=post name=mailform>
106: <input type=hidden name=postdata value="$feedurl">
107: Please check at least one of the following feedback types:
108: $options<hr>
109: My question/comment/feedback:<p>
110: <textarea name=comment cols=60 rows=10 wrap=hard>
111: </textarea><p>
112: <input type=hidden name=sendit value=1>
113: <input type=button value="Send Feedback" onClick='gosubmit();'></input>
114: </form>
115: </body>
116: </html>
117: ENDDOCUMENT
118: }
119:
120: sub fail_redirect {
121: my ($r,$feedurl) = @_;
122: $r->print (<<ENDFAILREDIR);
123: <head><title>Feedback not sent</title>
124: <meta http-equiv="pragma" content="no-cache"></meta>
125: <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
126: </head>
127: <html>
128: <body bgcolor="#FFFFFF">
129: <img align=right src=/adm/lonIcons/lonlogos.gif>
130: <b>Sorry, no recipients ...</b>
131: </body>
132: </html>
133: ENDFAILREDIR
134: }
135:
136: sub redirect_back {
137: my ($r,$feedurl,$typestyle,$sendsomething,$status) = @_;
138: $r->print (<<ENDREDIR);
139: <head>
140: <title>Feedback sent</title>
141: <meta http-equiv="pragma" content="no-cache"></meta>
142: <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
143: </head>
144: <html>
145: <body bgcolor="#FFFFFF">
146: <img align=right src=/adm/lonIcons/lonlogos.gif>
147: $typestyle
148: <b>Sent $sendsomething message(s).</b>
149: <font color=red>$status</font>
150: </body>
151: </html>
152: ENDREDIR
153: }
154:
155: sub no_redirect_back {
156: my ($r,$feedurl) = @_;
157: $r->print (<<ENDNOREDIR);
158: <head><title>Feedback not sent</title>
159: <meta http-equiv="pragma" content="no-cache"></meta>
160: ENDNOREDIR
161:
162: if ($feedurl!~/^\/adm\/feedback/) {
163: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2; url='.$feedurl.'">');
164: }
165:
166: $r->print (<<ENDNOREDIRTWO);
167: </head>
168: <html>
169: <body bgcolor="#FFFFFF">
170: <img align=right src=/adm/lonIcons/lonlogos.gif>
171: <b>Sorry, no feedback possible on this resource ...</b>
172: </body>
173: </html>
174: ENDNOREDIRTWO
175: }
176:
177: sub screen_header {
178: my ($feedurl) = @_;
179: my $options='';
180: if (($feedurl=~/^\/res/) && ($feedurl!~/^\/res\/adm/)) {
181: $options=
182: '<p><input type=checkbox name=author> Feedback to resource author';
183: }
184: if ($ENV{'course.'.$ENV{'request.course.id'}.'.question.email'}) {
185: $options.=
186: '<br><input type=checkbox name=question> Question about resource content';
187: }
188: if ($ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'}) {
189: $options.=
190: '<br><input type=checkbox name=course> '.
191: 'Question/Comment/Feedback about course content';
192: }
193: if ($ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'}) {
194: $options.=
195: '<br><input type=checkbox name=policy> '.
196: 'Question/Comment/Feedback about course policy';
197: }
198:
199: if ($ENV{'request.course.id'}) {
200: if (&Apache::lonnet::allowed('pch',$ENV{'request.course.id'})) {
201: $options.='<br><input type=checkbox name=discuss> '.
202: '<b>Contribution to course discussion of resource</b>';
203: $options.='<br><input type=checkbox name=anondiscuss> '.
204: '<b>Anonymous contribution to course discussion of resource</b>'.
205: ' (name only visible to course faculty)';
206: }
207: }
208: return $options;
209: }
210:
211: sub resource_output {
212: my ($feedurl) = @_;
213: my $usersaw=&Apache::lonnet::ssi($feedurl);
214: $usersaw=~s/\<body[^\>]*\>//gi;
215: $usersaw=~s/\<\/body\>//gi;
216: $usersaw=~s/\<html\>//gi;
217: $usersaw=~s/\<\/html\>//gi;
218: $usersaw=~s/\<head\>//gi;
219: $usersaw=~s/\<\/head\>//gi;
220: $usersaw=~s/action\s*\=/would_be_action\=/gi;
221: return $usersaw;
222: }
223:
224: sub clear_out_html {
225: my $message=$ENV{'form.comment'};
226: $message=~s/\</\<\;/g;
227: $message=~s/\>/\>\;/g;
228: return $message;
229: }
230:
231: sub assemble_email {
232: my ($feedurl,$message,$prevattempts,$usersaw)=@_;
233: my $email=<<"ENDEMAIL";
234: Refers to <a href="$feedurl">$feedurl</a>
235:
236: $message
237: ENDEMAIL
238: my $citations=<<"ENDCITE";
239: <h2>Previous attempts of student (if applicable)</h2>
240: $prevattempts
241: <p><hr>
242: <h2>Original screen output (if applicable)</h2>
243: $usersaw
244: ENDCITE
245: return ($email,$citations);
246: }
247:
248: sub decide_receiver {
249: my ($feedurl) = @_;
250: my $typestyle='';
251: my %to=();
252: if ($ENV{'form.author'}) {
253: $typestyle.='Submitting as Author Feedback<br>';
254: $feedurl=~/^\/res\/(\w+)\/(\w+)\//;
255: $to{$2.':'.$1}=1;
256: }
257: if ($ENV{'form.question'}) {
258: $typestyle.='Submitting as Question<br>';
259: map {
260: $to{$_}=1;
261: } split(/\,/,
262: $ENV{'course.'.$ENV{'request.course.id'}.'.question.email'});
263: }
264: if ($ENV{'form.course'}) {
265: $typestyle.='Submitting as Comment<br>';
266: map {
267: $to{$_}=1;
268: } split(/\,/,
269: $ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'});
270: }
271: if ($ENV{'form.policy'}) {
272: $typestyle.='Submitting as Policy Feedback<br>';
273: map {
274: $to{$_}=1;
275: } split(/\,/,
276: $ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'});
277: }
278: return ($typestyle,%to);
279: }
280:
281: sub send_msg {
282: my ($feedurl,$email,$citations,%to)=@_;
283: my $status='';
284: my $sendsomething=0;
285: map {
286: if ($_) {
287: unless (&Apache::lonmsg::user_normal_msg(split(/\:/,$_),
288: 'Feedback '.$feedurl,$email,$citations) eq 'ok') {
289: $status.='<br>Error sending message to '.$_.'<br>';
290: } else {
291: $sendsomething++;
292: }
293: }
294: } keys %to;
295:
296: my %record=&Apache::lonnet::restore('_feedback');
297: my ($temp)=keys %record;
298: unless ($temp=~/^error\:/) {
299: my %newrecord=();
300: $newrecord{'resource'}=$feedurl;
301: $newrecord{'subnumber'}=$record{'subnumber'}+1;
302: unless (&Apache::lonnet::cstore(\%newrecord,'_feedback') eq 'ok') {
303: $status.='<br>Not registered<br>';
304: }
305: }
306:
307: return ($status,$sendsomething);
308: }
309:
310: sub adddiscuss {
311: my ($symb,$email,$anon)=@_;
312: my $status='';
313: if (&Apache::lonnet::allowed('pch',$ENV{'request.course.id'})) {
314:
315: my %contrib=('message' => $email,
316: 'sendername' => $ENV{'user.name'},
317: 'senderdomain' => $ENV{'user.domain'});
318: if ($anon) {
319: $contrib{'anonymous'}='true';
320: }
321: if (($symb) && ($email)) {
322: $status='Adding to class discussion'.($anon?' (anonymous)':'').': '.
323: &Apache::lonnet::store(\%contrib,$symb,$ENV{'request.course.id'},
324: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
325: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
326: }
327: my %record=&Apache::lonnet::restore('_discussion');
328: my ($temp)=keys %record;
329: unless ($temp=~/^error\:/) {
330: my %newrecord=();
331: $newrecord{'resource'}=$symb;
332: $newrecord{'subnumber'}=$record{'subnumber'}+1;
333: $status.=' '.&Apache::lonnet::cstore(\%newrecord,'_discussion');
334: }
335: } else {
336: $status.='Failed.';
337: }
338: return $status.'<br>';
339: }
340:
341: sub handler {
342: my $r = shift;
343: if ($r->header_only) {
344: $r->content_type('text/html');
345: $r->send_http_header;
346: return OK;
347: }
348:
349: # --------------------------- Get query string for limited number of parameters
350:
351: map {
352: my ($name, $value) = split(/=/,$_);
353: $value =~ tr/+/ /;
354: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
355: if (($name eq 'hide') || ($name eq 'unhide')) {
356: unless ($ENV{'form.'.$name}) {
357: $ENV{'form.'.$name}=$value;
358: }
359: }
360: } (split(/&/,$ENV{'QUERY_STRING'}));
361:
362: if (($ENV{'form.hide'}) || ($ENV{'form.unhide'})) {
363: # ----------------------------------------------------------------- Hide/unhide
364: $r->content_type('text/html');
365: $r->send_http_header;
366:
367: my $entry=$ENV{'form.hide'}?$ENV{'form.hide'}:$ENV{'form.unhide'};
368:
369: my ($symb,$idx)=split(/\:\:\:/,$entry);
370: my ($map,$ind,$url)=split(/\_\_\_/,$symb);
371:
372: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
373: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
374: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
375:
376:
377: my $currenthidden=$contrib{'hidden'};
378:
379: if ($ENV{'form.hide'}) {
380: $currenthidden.='.'.$idx.'.';
381: } else {
382: $currenthidden=~s/\.$idx\.//g;
383: }
384: my %newhash=('hidden' => $currenthidden);
385:
386: &Apache::lonnet::store(\%newhash,$symb,$ENV{'request.course.id'},
387: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
388: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
389:
390: &redirect_back($r,'/res/'.$url,'Changed discussion status<p>','0');
391:
392:
393: } else {
394: # ------------------------------------------------------------- Normal feedback
395: my $feedurl=$ENV{'form.postdata'};
396: $feedurl=~s/^http\:\/\///;
397: $feedurl=~s/^$ENV{'SERVER_NAME'}//;
398: $feedurl=~s/^$ENV{'HTTP_HOST'}//;
399:
400: my $symb=&Apache::lonnet::symbread($feedurl);
401: my $goahead=1;
402: if ($feedurl=~/\.(problem|exam|quiz|assess|survey|form)$/) {
403: unless ($symb) { $goahead=0; }
404: }
405:
406: if ($goahead) {
407: # Go ahead with feedback, no ambiguous reference
408: $r->content_type('text/html');
409: $r->send_http_header;
410:
411: if (
412: (
413: ($feedurl=~m:^/res:) && ($feedurl!~m:^/res/adm:)
414: )
415: ||
416: ($ENV{'request.course.id'} && ($feedurl!~m:^/adm:))
417: ) {
418: # --------------------------------------------------- Print login screen header
419: unless ($ENV{'form.sendit'}) {
420: my $options=&screen_header($feedurl);
421: if ($options) {
422: &mail_screen($r,$feedurl,$options);
423: } else {
424: &fail_redirect($r,$feedurl);
425: }
426: } else {
427:
428: # Get previous user input
429: my $prevattempts=&Apache::loncommon::get_previous_attempt(
430: $symb,$ENV{'user.name'},$ENV{'user.domain'},
431: $ENV{'request.course.id'});
432:
433: # Get output from resource
434: my $usersaw=&resource_output($feedurl);
435:
436: # Filter HTML out of message (could be nasty)
437: my $message=&clear_out_html;
438:
439: # Assemble email
440: my ($email,$citations)=&assemble_email($feedurl,$message,$prevattempts,
441: $usersaw);
442:
443: # Who gets this?
444: my ($typestyle,%to) = &decide_receiver($feedurl);
445:
446: # Actually send mail
447: my ($status,$numsent)=&send_msg($feedurl,$email,$citations,%to);
448:
449: # Discussion? Store that.
450:
451: if ($ENV{'form.discuss'}) {
452: $typestyle.=&adddiscuss($symb,$message);
453: }
454:
455: if ($ENV{'form.anondiscuss'}) {
456: $typestyle.=&adddiscuss($symb,$message,1);
457: }
458:
459:
460: # Receipt screen and redirect back to where came from
461: &redirect_back($r,$feedurl,$typestyle,$numsent,$status);
462:
463: }
464: } else {
465: # Unable to give feedback
466: &no_redirect_back($r,$feedurl);
467: }
468: } else {
469: # Ambiguous Problem Resource
470: $r->internal_redirect('/adm/ambiguous');
471: }
472: }
473: return OK;
474: }
475:
476: 1;
477: __END__
478:
479:
480:
481:
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