1: # The LearningOnline Network
2: # Feedback
3: #
4: # $Id: lonfeedback.pm,v 1.54 2003/09/14 23:57:18 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 list_discussion {
56: my ($crs,$symb,$discussiononly)=@_;
57: unless ($symb) {
58: $symb=&Apache::lonnet::symbread();
59: }
60: unless ($symb) { return ''; }
61: my $seeid=&Apache::lonnet::allowed('rin',$crs);
62: my $viewgrades=&Apache::lonnet::allowed('vgr',$crs);
63: my $discussion='';
64: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
65: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
66: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
67: if ($contrib{'version'}) {
68: unless ($discussiononly) {
69: $discussion.=
70: '<address><hr />';
71: }
72: my $idx;
73: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
74: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
75: my $deleted=($contrib{'deleted'}=~/\.$idx\./);
76: unless ((($hidden) && (!$seeid)) || ($deleted)) {
77: my $message=$contrib{$idx.':message'};
78: $message=~s/\n/\<br \/\>/g;
79: $message=&Apache::lontexconvert::msgtexconverted($message);
80: if ($contrib{$idx.':attachmenturl'}) {
81: my ($fname,$ft)
82: =($contrib{$idx.':attachmenturl'}=~/\/(\w+)\.(\w+)$/);
83: $message.='<p>Attachment: <a href="'.
84: &Apache::lonnet::tokenwrapper(
85: $contrib{$idx.':attachmenturl'}).
86: '"><tt>'.$fname.'.'.$ft.'</tt></a>';
87: }
88: if ($message) {
89: if ($hidden) {
90: $message='<font color="#888888">'.$message.'</font>';
91: }
92: my $screenname=&Apache::loncommon::screenname(
93: $contrib{$idx.':sendername'},
94: $contrib{$idx.':senderdomain'});
95: my $plainname=&Apache::loncommon::nickname(
96: $contrib{$idx.':sendername'},
97: $contrib{$idx.':senderdomain'});
98:
99: my $sender='Anonymous';
100: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
101: $sender=&Apache::loncommon::aboutmewrapper(
102: $plainname,
103: $contrib{$idx.':sendername'},
104: $contrib{$idx.':senderdomain'}).' ('.
105: $contrib{$idx.':sendername'}.' at '.
106: $contrib{$idx.':senderdomain'}.')';
107: if ($contrib{$idx.':anonymous'}) {
108: $sender.=' [anonymous] '.
109: $screenname;
110: }
111: if ($seeid) {
112: if ($hidden) {
113: $sender.=' <a href="/adm/feedback?unhide='.
114: $symb.':::'.$idx.'">Make Visible</a>';
115: } else {
116: $sender.=' <a href="/adm/feedback?hide='.
117: $symb.':::'.$idx.'">Hide</a>';
118: }
119: $sender.=' <a href="/adm/feedback?deldisc='.
120: $symb.':::'.$idx.'">Delete</a>';
121: }
122: } else {
123: if ($screenname) {
124: $sender='<i>'.$screenname.'</i>';
125: }
126: }
127: my $vgrlink;
128: if ($viewgrades) {
129: $vgrlink=&Apache::loncommon::submlink('Submissions',
130: $contrib{$idx.':sendername'},$contrib{$idx.':senderdomain'},$symb);
131: }
132: $discussion.='<p><b>'.$sender.'</b> '.$vgrlink.' ('.
133: localtime($contrib{$idx.':timestamp'}).
134: '):<blockquote>'.$message.
135: '</blockquote></p>';
136: }
137: }
138: }
139: unless ($discussiononly) {
140: $discussion.='</address>';
141: }
142: }
143: if ($discussiononly) {
144: $discussion.=(<<ENDDISCUSS);
145: <form action="/adm/feedback" method="post" name="mailform" enctype="multipart/form-data">
146: <input type="submit" name="discuss" value="Post Discussion" />
147: <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
148: <input type="hidden" name="symb" value="$symb" />
149: <input type="hidden" name="sendit" value="true" />
150: <br />
151: <font size="1">Note: in anonymous discussion, your name is visible only to
152: course faculty</font><br />
153: <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
154: <p>
155: Attachment (128 KB max size): <input type="file" name="attachment" />
156: </p>
157: </form>
158: ENDDISCUSS
159: $discussion.=&generate_preview_button();
160: }
161: return $discussion;
162: }
163:
164: sub mail_screen {
165: my ($r,$feedurl,$options) = @_;
166: my $bodytag=&Apache::loncommon::bodytag('Resource Feedback and Discussion',
167: '','onLoad="window.focus();"');
168: my $title=&Apache::lonnet::gettitle($feedurl);
169: if (!$title) { $title = $feedurl; }
170: my $latexHelp = Apache::loncommon::helpLatexCheatsheet();
171: $r->print(<<ENDDOCUMENT);
172: <html>
173: <head>
174: <title>The LearningOnline Network with CAPA</title>
175: <meta http-equiv="pragma" content="no-cache"></meta>
176: <script>
177: function gosubmit() {
178: var rec=0;
179: if (typeof(document.mailform.elements.author)!="undefined") {
180: if (document.mailform.elements.author.checked) {
181: rec=1;
182: }
183: }
184: if (typeof(document.mailform.elements.question)!="undefined") {
185: if (document.mailform.elements.question.checked) {
186: rec=1;
187: }
188: }
189: if (typeof(document.mailform.elements.course)!="undefined") {
190: if (document.mailform.elements.course.checked) {
191: rec=1;
192: }
193: }
194: if (typeof(document.mailform.elements.policy)!="undefined") {
195: if (document.mailform.elements.policy.checked) {
196: rec=1;
197: }
198: }
199: if (typeof(document.mailform.elements.discuss)!="undefined") {
200: if (document.mailform.elements.discuss.checked) {
201: rec=1;
202: }
203: }
204: if (typeof(document.mailform.elements.anondiscuss)!="undefined") {
205: if (document.mailform.elements.anondiscuss.checked) {
206: rec=1;
207: }
208: }
209:
210: if (rec) {
211: document.mailform.submit();
212: } else {
213: alert('Please check a feedback type.');
214: }
215: }
216: </script>
217: </head>
218: $bodytag
219: <h2><tt>$title</tt></h2>
220: <form action="/adm/feedback" method="post" name="mailform"
221: enctype="multipart/form-data">
222: <input type=hidden name=postdata value="$feedurl">
223: Please check at least one of the following feedback types:
224: $options<hr>
225: My question/comment/feedback:<p>
226: $latexHelp
227: <textarea name=comment cols=60 rows=10 wrap=hard>
228: </textarea><p>
229: Attachment (128 KB max size): <input type="file" name="attachment" />
230: </p>
231: <p>
232: <input type="hidden" name="sendit" value="1" />
233: <input type=button value="Send Feedback" onClick='gosubmit();' />
234: </p>
235: </form>
236: ENDDOCUMENT
237: $r->print(&generate_preview_button().'</body></html>');
238: }
239:
240: sub fail_redirect {
241: my ($r,$feedurl) = @_;
242: $r->print (<<ENDFAILREDIR);
243: <head><title>Feedback not sent</title>
244: <meta http-equiv="pragma" content="no-cache"></meta>
245: <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
246: </head>
247: <html>
248: <body bgcolor="#FFFFFF">
249: <img align=right src=/adm/lonIcons/lonlogos.gif>
250: <b>Sorry, no recipients ...</b>
251: </body>
252: </html>
253: ENDFAILREDIR
254: }
255:
256: sub redirect_back {
257: my ($r,$feedurl,$typestyle,$sendsomething,$sendposts,$status) = @_;
258: $r->print (<<ENDREDIR);
259: <head>
260: <title>Feedback sent</title>
261: <meta http-equiv="pragma" content="no-cache"></meta>
262: <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
263: </head>
264: <html>
265: <body bgcolor="#FFFFFF" onLoad='if (window.name!="loncapaclient") { this.document.reldt.submit(); self.close(); }'>
266: <img align=right src=/adm/lonIcons/lonlogos.gif>
267: $typestyle
268: <b>Sent $sendsomething message(s), and $sendposts post(s).</b>
269: <font color=red>$status</font>
270: <form name="reldt" action="$feedurl" target="loncapaclient">
271: </form>
272: </body>
273: </html>
274: ENDREDIR
275: }
276:
277: sub no_redirect_back {
278: my ($r,$feedurl) = @_;
279: $r->print (<<ENDNOREDIR);
280: <head><title>Feedback not sent</title>
281: <meta http-equiv="pragma" content="no-cache"></meta>
282: ENDNOREDIR
283:
284: if ($feedurl!~/^\/adm\/feedback/) {
285: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2; url='.$feedurl.'">');
286: }
287:
288: $r->print (<<ENDNOREDIRTWO);
289: </head>
290: <html>
291: <body bgcolor="#FFFFFF" onLoad='if (window.name!="loncapaclient") { self.close(); }'>
292: <img align=right src=/adm/lonIcons/lonlogos.gif>
293: <b>Sorry, no feedback possible on this resource ...</b>
294: </body>
295: </html>
296: ENDNOREDIRTWO
297: }
298:
299: sub screen_header {
300: my ($feedurl) = @_;
301: my $msgoptions='';
302: my $discussoptions='';
303: if (($feedurl=~/^\/res\//) && ($feedurl!~/^\/res\/adm/)) {
304: $msgoptions=
305: '<p><input type=checkbox name=author> Feedback to resource author';
306: }
307: if (&feedback_available(1)) {
308: $msgoptions.=
309: '<br><input type=checkbox name=question> Question about resource content';
310: }
311: if (&feedback_available(0,1)) {
312: $msgoptions.=
313: '<br><input type=checkbox name=course> '.
314: 'Question/Comment/Feedback about course content';
315: }
316: if (&feedback_available(0,0,1)) {
317: $msgoptions.=
318: '<br><input type=checkbox name=policy> '.
319: 'Question/Comment/Feedback about course policy';
320: }
321:
322: if ($ENV{'request.course.id'}) {
323: if (&Apache::lonnet::allowed('pch',
324: $ENV{'request.course.id'}.
325: ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
326: $discussoptions='<input type="checkbox" name="discuss" onClick="this.form.anondiscuss.checked=false;"> '.
327: 'Contribution to course discussion of resource';
328: $discussoptions.='<br><input type="checkbox" name="anondiscuss" onClick="this.form.discuss.checked=false;"> '.
329: 'Anonymous contribution to course discussion of resource'.
330: ' <i>(name only visible to course faculty)</i>';
331: }
332: }
333: if ($msgoptions) { $msgoptions='<h2>Sending Messages</h2>'.$msgoptions; }
334: if ($discussoptions) {
335: $discussoptions='<h2>Discussion Contributions</h2>'.$discussoptions; }
336: return $msgoptions.$discussoptions;
337: }
338:
339: sub resource_output {
340: my ($feedurl) = @_;
341: my $usersaw=&Apache::lonnet::ssi_body($feedurl);
342: $usersaw=~s/\<body[^\>]*\>//gi;
343: $usersaw=~s/\<\/body\>//gi;
344: $usersaw=~s/\<html\>//gi;
345: $usersaw=~s/\<\/html\>//gi;
346: $usersaw=~s/\<head\>//gi;
347: $usersaw=~s/\<\/head\>//gi;
348: $usersaw=~s/action\s*\=/would_be_action\=/gi;
349: return $usersaw;
350: }
351:
352: sub clear_out_html {
353: my ($message,$override)=@_;
354: my $cid=$ENV{'request.course.id'};
355: if (($ENV{"course.$cid.allow_limited_html_in_feedback"} =~ m/yes/i) ||
356: ($override)) {
357: # allows <B> <I> <P> <A> <LI> <OL> <UL> <EM> <BR> <TT> <STRONG>
358: # <BLOCKQUOTE> <DIV .*> <DIV> <IMG>
359: my %html=(B=>1, I=>1, P=>1, A=>1, LI=>1, OL=>1, UL=>1, EM=>1,
360: BR=>1, TT=>1, STRONG=>1, BLOCKQUOTE=>1, DIV=>1, IMG=>1);
361:
362: $message =~ s/\<(\/?\s*(\w+)[^\>\<]*)/
363: {($html{uc($2)}&&(length($1)<1000))?"\<$1":"\<$1"}/ge;
364: $message =~ s/(\<?\s*(\w+)[^\<\>]*)\>/
365: {($html{uc($2)}&&(length($1)<1000))?"$1\>":"$1\>"}/ge;
366: } else {
367: $message=~s/\<\/*m\s*\>//g;
368: $message=~s/\</\<\;/g;
369: $message=~s/\>/\>\;/g;
370: }
371: return $message;
372: }
373:
374: sub assemble_email {
375: my ($feedurl,$message,$prevattempts,$usersaw,$useranswer)=@_;
376: my $email=<<"ENDEMAIL";
377: Refers to <a href="$feedurl">$feedurl</a>
378:
379: $message
380: ENDEMAIL
381: my $citations=<<"ENDCITE";
382: <h2>Previous attempts of student (if applicable)</h2>
383: $prevattempts
384: <p><hr>
385: <h2>Original screen output (if applicable)</h2>
386: $usersaw
387: <h2>Correct Answer(s) (if applicable)</h2>
388: $useranswer
389: ENDCITE
390: return ($email,$citations);
391: }
392:
393: sub secapply {
394: my $rec=shift;
395: my $defaultflag=shift;
396: $rec=~s/\s+//g;
397: $rec=~s/\@/\:/g;
398: my ($adr,$sections)=($rec=~/^([^\(]+)\(([^\)]+)\)/);
399: if ($sections) {
400: foreach (split(/\;/,$sections)) {
401: if (($_ eq $ENV{'request.course.sec'}) ||
402: ($defaultflag && ($_ eq '*'))) {
403: return $adr;
404: }
405: }
406: } else {
407: return $rec;
408: }
409: return '';
410: }
411:
412: sub decide_receiver {
413: my ($feedurl,$author,$question,$course,$policy,$defaultflag) = @_;
414: my $typestyle='';
415: my %to=();
416: if ($ENV{'form.author'}||$author) {
417: $typestyle.='Submitting as Author Feedback<br>';
418: $feedurl=~/^\/res\/(\w+)\/(\w+)\//;
419: $to{$2.':'.$1}=1;
420: }
421: if ($ENV{'form.question'}||$question) {
422: $typestyle.='Submitting as Question<br>';
423: foreach (split(/\,/,
424: $ENV{'course.'.$ENV{'request.course.id'}.'.question.email'})
425: ) {
426: my $rec=&secapply($_,$defaultflag);
427: if ($rec) { $to{$rec}=1; }
428: }
429: }
430: if ($ENV{'form.course'}||$course) {
431: $typestyle.='Submitting as Comment<br>';
432: foreach (split(/\,/,
433: $ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'})
434: ) {
435: my $rec=&secapply($_,$defaultflag);
436: if ($rec) { $to{$rec}=1; }
437: }
438: }
439: if ($ENV{'form.policy'}||$policy) {
440: $typestyle.='Submitting as Policy Feedback<br>';
441: foreach (split(/\,/,
442: $ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'})
443: ) {
444: my $rec=&secapply($_,$defaultflag);
445: if ($rec) { $to{$rec}=1; }
446: }
447: }
448: if ((scalar(%to) eq '0') && (!$defaultflag)) {
449: ($typestyle,%to)=
450: &decide_receiver($feedurl,$author,$question,$course,$policy,1);
451: }
452: return ($typestyle,%to);
453: }
454:
455: sub feedback_available {
456: my ($question,$course,$policy)=@_;
457: my ($typestyle,%to)=&decide_receiver('',0,$question,$course,$policy);
458: return scalar(%to);
459: }
460:
461: sub send_msg {
462: my ($feedurl,$email,$citations,$attachmenturl,%to)=@_;
463: my $status='';
464: my $sendsomething=0;
465: foreach (keys %to) {
466: if ($_) {
467: my $declutter=&Apache::lonnet::declutter($feedurl);
468: unless (&Apache::lonmsg::user_normal_msg(split(/\:/,$_),
469: 'Feedback ['.$declutter.']',$email,$citations,$feedurl,
470: $attachmenturl)=~/ok/) {
471: $status.='<br>Error sending message to '.$_.'<br>';
472: } else {
473: $sendsomething++;
474: }
475: }
476: }
477:
478: my %record=&Apache::lonnet::restore('_feedback');
479: my ($temp)=keys %record;
480: unless ($temp=~/^error\:/) {
481: my %newrecord=();
482: $newrecord{'resource'}=$feedurl;
483: $newrecord{'subnumber'}=$record{'subnumber'}+1;
484: unless (&Apache::lonnet::cstore(\%newrecord,'_feedback') eq 'ok') {
485: $status.='<br>Not registered<br>';
486: }
487: }
488:
489: return ($status,$sendsomething);
490: }
491:
492: sub adddiscuss {
493: my ($symb,$email,$anon,$attachmenturl)=@_;
494: my $status='';
495: if (&Apache::lonnet::allowed('pch',$ENV{'request.course.id'}.
496: ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
497:
498: my %contrib=('message' => $email,
499: 'sendername' => $ENV{'user.name'},
500: 'senderdomain' => $ENV{'user.domain'},
501: 'screenname' => $ENV{'environment.screenname'},
502: 'plainname' => $ENV{'environment.firstname'}.' '.
503: $ENV{'environment.middlename'}.' '.
504: $ENV{'environment.lastname'}.' '.
505: $ENV{'enrironment.generation'},
506: 'attachmenturl'=> $attachmenturl);
507: if ($anon) {
508: $contrib{'anonymous'}='true';
509: }
510: if (($symb) && ($email)) {
511: $status='Adding to class discussion'.($anon?' (anonymous)':'').': '.
512: &Apache::lonnet::store(\%contrib,$symb,$ENV{'request.course.id'},
513: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
514: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
515: my %storenewentry=($symb => time);
516: $status.='<br>Updating discussion time: '.
517: &Apache::lonnet::put('discussiontimes',\%storenewentry,
518: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
519: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
520: }
521: my %record=&Apache::lonnet::restore('_discussion');
522: my ($temp)=keys %record;
523: unless ($temp=~/^error\:/) {
524: my %newrecord=();
525: $newrecord{'resource'}=$symb;
526: $newrecord{'subnumber'}=$record{'subnumber'}+1;
527: $status.='<br>Registering: '.
528: &Apache::lonnet::cstore(\%newrecord,'_discussion');
529: }
530: } else {
531: $status.='Failed.';
532: }
533: return $status.'<br>';
534: }
535:
536: # ----------------------------------------------------------- Preview function
537:
538: sub show_preview {
539: my $r=shift;
540: my $message=&clear_out_html($ENV{'form.comment'});
541: $message=~s/\n/\<br \/\>/g;
542: $message=&Apache::lontexconvert::msgtexconverted($message);
543: $r->print('<table border="2"><tr><td>'.
544: $message.'</td></tr></table>');
545: }
546:
547: sub generate_preview_button {
548: return(<<ENDPREVIEW);
549: <form name="preview" action="/adm/feedback?preview=1" method="post" target="preview">
550: <input type="hidden" name="comment" />
551: <input type="button" value="Show Preview"
552: onClick="this.form.comment.value=document.mailform.comment.value;this.form.submit();" />
553: </form>
554: ENDPREVIEW
555: }
556: sub handler {
557: my $r = shift;
558: if ($r->header_only) {
559: $r->content_type('text/html');
560: $r->send_http_header;
561: return OK;
562: }
563:
564: # --------------------------- Get query string for limited number of parameters
565:
566: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
567: ['hide','unhide','deldisc','postdata','preview']);
568:
569: if (($ENV{'form.hide'}) || ($ENV{'form.unhide'})) {
570: # ----------------------------------------------------------------- Hide/unhide
571: $r->content_type('text/html');
572: $r->send_http_header;
573:
574: my $entry=$ENV{'form.hide'}?$ENV{'form.hide'}:$ENV{'form.unhide'};
575:
576: my ($symb,$idx)=split(/\:\:\:/,$entry);
577: my ($map,$ind,$url)=&Apache::lonnet::decode_symb($symb);
578:
579: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
580: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
581: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
582:
583:
584: my $currenthidden=$contrib{'hidden'};
585:
586: if ($ENV{'form.hide'}) {
587: $currenthidden.='.'.$idx.'.';
588: } else {
589: $currenthidden=~s/\.$idx\.//g;
590: }
591: my %newhash=('hidden' => $currenthidden);
592:
593: &Apache::lonnet::store(\%newhash,$symb,$ENV{'request.course.id'},
594: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
595: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
596:
597: &redirect_back($r,&Apache::lonnet::clutter($url),
598: 'Changed discussion status<p>','0','0');
599: } elsif ($ENV{'form.deldisc'}) {
600: # --------------------------------------------------------------- Hide for good
601: $r->content_type('text/html');
602: $r->send_http_header;
603:
604: my $entry=$ENV{'form.deldisc'};
605:
606: my ($symb,$idx)=split(/\:\:\:/,$entry);
607: my ($map,$ind,$url)=&Apache::lonnet::decode_symb($symb);
608:
609: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
610: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
611: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
612:
613:
614: my $currentdeleted=$contrib{'deleted'};
615:
616: $currentdeleted.='.'.$idx.'.';
617:
618: my %newhash=('deleted' => $currentdeleted);
619:
620: &Apache::lonnet::store(\%newhash,$symb,$ENV{'request.course.id'},
621: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
622: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
623:
624: &redirect_back($r,&Apache::lonnet::clutter($url),
625: 'Changed discussion status<p>','0','0');
626: } elsif ($ENV{'form.preview'}) {
627: # -------------------------------------------------------- User wants a preview
628: &show_preview($r);
629: } else {
630: # ------------------------------------------------------------- Normal feedback
631: my $feedurl=$ENV{'form.postdata'};
632: $feedurl=~s/^http\:\/\///;
633: $feedurl=~s/^$ENV{'SERVER_NAME'}//;
634: $feedurl=~s/^$ENV{'HTTP_HOST'}//;
635:
636: my $symb=&Apache::lonnet::symbread($feedurl);
637: unless ($symb) {
638: $symb=$ENV{'form.symb'};
639: if ($symb) {
640: my ($map,$id,$url)=&Apache::lonnet::decode_symb($symb);
641: $feedurl=&Apache::lonnet::clutter($url);
642: }
643: }
644: my $goahead=1;
645: if ($feedurl=~/\.(problem|exam|quiz|assess|survey|form)$/) {
646: unless ($symb) { $goahead=0; }
647: }
648:
649: if ($goahead) {
650: # Go ahead with feedback, no ambiguous reference
651: $r->content_type('text/html');
652: $r->send_http_header;
653:
654: if (
655: (
656: ($feedurl=~m:^/res:) && ($feedurl!~m:^/res/adm:)
657: )
658: ||
659: ($ENV{'request.course.id'} && ($feedurl!~m:^/adm:))
660: ||
661: ($ENV{'request.course.id'} && ($symb=~/^bulletin\_\_\_/))
662: ) {
663: # --------------------------------------------------- Print login screen header
664: unless ($ENV{'form.sendit'}) {
665: my $options=&screen_header($feedurl);
666: if ($options) {
667: &mail_screen($r,$feedurl,$options);
668: } else {
669: &fail_redirect($r,$feedurl);
670: }
671: } else {
672:
673: # Get previous user input
674: my $prevattempts=&Apache::loncommon::get_previous_attempt(
675: $symb,$ENV{'user.name'},$ENV{'user.domain'},
676: $ENV{'request.course.id'});
677:
678: # Get output from resource
679: my $usersaw=&resource_output($feedurl);
680:
681: # Get resource answer (need to allow student to view grades for this to work)
682: &Apache::lonnet::appenv(('allowed.vgr'=>'F'));
683: my $useranswer=&Apache::loncommon::get_student_answers(
684: $symb,$ENV{'user.name'},$ENV{'user.domain'},
685: $ENV{'request.course.id'});
686: &Apache::lonnet::delenv('allowed.vgr');
687: # Get attachments, if any, and not too large
688: my $attachmenturl='';
689: if ($ENV{'form.attachment.filename'}) {
690: unless (length($ENV{'form.attachment'})>131072) {
691: $attachmenturl=&Apache::lonnet::userfileupload('attachment');
692: }
693: }
694: # Filter HTML out of message (could be nasty)
695: my $message=&clear_out_html($ENV{'form.comment'});
696:
697: # Assemble email
698: my ($email,$citations)=&assemble_email($feedurl,$message,$prevattempts,
699: $usersaw,$useranswer);
700:
701: # Who gets this?
702: my ($typestyle,%to) = &decide_receiver($feedurl);
703:
704: # Actually send mail
705: my ($status,$numsent)=&send_msg($feedurl,$email,$citations,
706: $attachmenturl,%to);
707:
708: # Discussion? Store that.
709:
710: my $numpost=0;
711: if ($ENV{'form.discuss'}) {
712: $typestyle.=&adddiscuss($symb,$message,0,$attachmenturl);
713: $numpost++;
714: }
715:
716: if ($ENV{'form.anondiscuss'}) {
717: $typestyle.=&adddiscuss($symb,$message,1,$attachmenturl);
718: $numpost++;
719: }
720:
721:
722: # Receipt screen and redirect back to where came from
723: &redirect_back($r,$feedurl,$typestyle,$numsent,$numpost,$status);
724:
725: }
726: } else {
727: # Unable to give feedback
728: &no_redirect_back($r,$feedurl);
729: }
730: } else {
731: # Ambiguous Problem Resource
732: if ( Apache::exists_config_define("MODPERL2") ) {
733: &Apache::lonnet::cleanenv();
734: }
735: $r->internal_redirect('/adm/ambiguous');
736: }
737: }
738: return OK;
739: }
740:
741: 1;
742: __END__
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