File:  [LON-CAPA] / loncom / interface / lonfeedback.pm
Revision 1.236: download - view: text, annotated - select for diffs
Mon Dec 11 18:50:40 2006 UTC (17 years, 5 months ago) by raeburn
Branches: MAIN
CVS tags: version_2_2_99_1, version_2_2_99_0, HEAD
bug 5037 - destinations for resource content, course content, or course policy can now be filtered based on sender's group memberships.

    1: # The LearningOnline Network
    2: # Feedback
    3: #
    4: # $Id: lonfeedback.pm,v 1.236 2006/12/11 18:50:40 raeburn 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: ###
   29: 
   30: package Apache::lonfeedback;
   31: 
   32: use strict;
   33: use Apache::Constants qw(:common);
   34: use Apache::lonmsg();
   35: use Apache::loncommon();
   36: use Apache::lontexconvert();
   37: use Apache::lonlocal; # must not have ()
   38: use Apache::lonnet;
   39: use Apache::lonhtmlcommon();
   40: use Apache::lonnavmaps;
   41: use Apache::lonenc();
   42: use Apache::lonrss();
   43: use HTML::LCParser();
   44: use Apache::lonspeller();
   45: use Apache::longroup;
   46: use Cwd;
   47: use LONCAPA;
   48: 
   49: sub discussion_open {
   50:     my ($status,$symb)=@_;
   51:     if ($env{'request.role.adv'}) { return 1; }
   52:     if (defined($status) &&
   53: 	!($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER'
   54: 	  || $status eq 'OPEN')) {
   55: 	return 0;
   56:     }
   57:     my $close=&Apache::lonnet::EXT('resource.0.discussend',$symb);
   58:     if (defined($close) && $close ne '' && $close < time) {
   59: 	return 0;
   60:     }
   61:     return 1;
   62: }
   63: 
   64: sub discussion_visible {
   65:     my ($status)=@_;
   66:     if (not &discussion_open($status)) {
   67: 	my $hidden=&Apache::lonnet::EXT('resource.0.discusshide');
   68: 	if (lc($hidden) eq 'yes' or $hidden eq '' or !defined($hidden))  {
   69: 	    if (!$env{'request.role.adv'}) { return 0; }
   70: 	}
   71:     }
   72:     return 1;
   73: }
   74: 
   75: sub list_discussion {
   76:     my ($mode,$status,$ressymb,$imsextras,$group)=@_;
   77:     unless ($ressymb) { $ressymb=&Apache::lonnet::symbread(); }
   78:     unless ($ressymb) { return ''; }
   79:     $ressymb=&wrap_symb($ressymb);
   80:     my $outputtarget=$env{'form.grade_target'};
   81:     if (defined($env{'form.export'})) {
   82: 	if($env{'form.export'}) {
   83:             $outputtarget = 'export';
   84:         }
   85:     }
   86:     if (defined($imsextras)) {
   87:         if ($$imsextras{'caller'} eq 'imsexport') {
   88:             $outputtarget = 'export';
   89:         }
   90:     }
   91:     if (not &discussion_visible($status)) {
   92:         if ($mode ne 'board') {
   93:             &Apache::lonenc::check_encrypt(\$ressymb); 
   94:             return &send_message_link($ressymb);
   95:         }
   96:     }
   97:     if ($group ne '' && $mode eq 'board') {
   98:         if (&check_group_priv($group,'vgb') ne 'ok') {
   99:             return '';
  100:         }
  101:     }
  102: 
  103:     my ($blocked,$blocktext) = 
  104:         &Apache::loncommon::blocking_status('boards');
  105:     if ($blocked) {
  106:         &Apache::lonenc::check_encrypt(\$ressymb);
  107:         if ($mode ne 'board') {
  108:             $blocktext.='<br />'.&send_message_link($ressymb);
  109:         }
  110:         return $blocktext; 
  111:     }
  112: 
  113:     my @bgcols = ("#cccccc","#eeeeee");
  114:     my $discussiononly=0;
  115:     if ($mode eq 'board') { $discussiononly=1; }
  116:     unless ($env{'request.course.id'}) { return ''; }
  117:     my $crs='/'.$env{'request.course.id'};
  118:     my $cid=$env{'request.course.id'};
  119:     if ($env{'request.course.sec'}) {
  120: 	$crs.='_'.$env{'request.course.sec'};
  121:     }
  122:     $crs=~s/\_/\//g;
  123:     my $encsymb=&Apache::lonenc::check_encrypt($ressymb);
  124:     my $viewgrades=(&Apache::lonnet::allowed('vgr',$crs)
  125: 		  && ($ressymb=~/\.(problem|exam|quiz|assess|survey|form|task)$/));
  126:     
  127:     my %usernamesort = ();
  128:     my %namesort =();
  129:     my %subjectsort = ();
  130: 
  131: # Get discussion display settings for this discussion
  132:     my $lastkey = $ressymb.'_lastread';
  133:     my $showkey = $ressymb.'_showonlyunread';
  134:     my $markkey = $ressymb.'_showonlyunmark',
  135:     my $visitkey = $ressymb.'_visit';
  136:     my $ondispkey = $ressymb.'_markondisp';
  137:     my $userpickkey = $ressymb.'_userpick';
  138:     my $toggkey = $ressymb.'_readtoggle';
  139:     my $readkey = $ressymb.'_read';
  140:     $ressymb=$encsymb;
  141:     my %dischash = &Apache::lonnet::get('nohist_'.$cid.'_discuss',[$lastkey,$showkey,$markkey,$visitkey,$ondispkey,$userpickkey,$toggkey,$readkey],$env{'user.domain'},$env{'user.name'});
  142:     my %discinfo = ();
  143:     my $showonlyunread = 0;
  144:     my $showunmark = 0; 
  145:     my $markondisp = 0;
  146:     my $prevread = 0;
  147:     my $previous = 0;
  148:     my $visit = 0;
  149:     my $newpostsflag = 0;
  150:     my @posters = split(/\&/,$dischash{$userpickkey});
  151: 
  152: # Retain identification of "NEW" posts identified in last display, if continuing 'previous' browsing of posts.
  153:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['previous','sortposts','rolefilter','statusfilter','sectionpick','grouppick','totposters']);
  154:     my $sortposts = $env{'form.sortposts'};
  155:     my $statusfilter = $env{'form.statusfilter'};
  156:     my @sectionpick = split(/,/,$env{'form.sectionpick'});
  157:     my @grouppick   = split(/,/,$env{'form.grouppick'});
  158:     my @rolefilter  = split(/,/,$env{'form.rolefilter'});
  159: 
  160:     my $totposters = $env{'form.totposters'};
  161:     $previous = $env{'form.previous'};
  162:     if ($previous > 0) {
  163:         $prevread = $previous;
  164:     } elsif (defined($dischash{$lastkey})) {
  165:         unless ($dischash{$lastkey} eq '') {
  166:             $prevread = $dischash{$lastkey};
  167:         }
  168:     }
  169: 
  170:     my $cdom = $env{'course.'.$cid.'.domain'};
  171:     my $cnum = $env{'course.'.$cid.'.num'};
  172: 
  173: # Get information about students and non-students in course for filtering display of posts
  174:     my %roleshash = ();
  175:     my %roleinfo = ();
  176:     my ($classgroups,$studentgroups);
  177:     if ($env{'form.rolefilter'}) {
  178:         %roleshash = &Apache::lonnet::dump('nohist_userroles',$cdom,$cnum);
  179:         foreach my $rolekey (keys(%roleshash)) {
  180:             my ($role,$uname,$udom,$sec) = split(/:/,$rolekey);
  181:             if ($role =~ /^cr/) {
  182:                 $role = 'cr';
  183:             }
  184:             my ($end,$start) = split(/:/,$roleshash{$rolekey});
  185:             my $now = time;
  186:             my $status = 'Active';
  187:             if (($now < $start) || ($end > 0 && $now > $end)) {
  188:                 $status = 'Expired';
  189:             }
  190:             if ($uname && $udom) { 
  191:                 push(@{$roleinfo{$uname.':'.$udom}}, $role.':'.$sec.':'.$status);
  192:             }
  193:         }
  194:         my ($classlist,$keylist) =
  195:                          &Apache::loncoursedata::get_classlist($cdom,$cnum);
  196:         my $sec_index = &Apache::loncoursedata::CL_SECTION();
  197:         my $status_index = &Apache::loncoursedata::CL_STATUS();
  198:         while (my ($student,$data) = each %$classlist) {
  199:             my ($section,$status) = ($data->[$sec_index],
  200:                                  $data->[$status_index]);
  201:             push(@{$roleinfo{$student}}, 'st:'.$section.':'.$status);
  202:         }
  203: 	($classgroups,$studentgroups) = 
  204: 	    &Apache::loncoursedata::get_group_memberships($classlist,$keylist,
  205: 							  $cdom,$cnum);
  206:     }
  207: 
  208: # Get discussion display default settings for user
  209:     if ($env{'environment.discdisplay'} eq 'unread') {
  210:         $showonlyunread = 1;
  211:     }
  212:     if ($env{'environment.discmarkread'} eq 'ondisp') {
  213:         $markondisp = 1;
  214:     }
  215: 
  216: # Override user's default if user specified display setting for this discussion
  217:     if (defined($dischash{$ondispkey})) {
  218:         unless ($dischash{$ondispkey} eq '') {
  219:             $markondisp = $dischash{$ondispkey};
  220:         }
  221:     }
  222:     if ($markondisp) {
  223:         $discinfo{$lastkey} = time;
  224:     }
  225: 
  226:     if (defined($dischash{$showkey})) {
  227:         unless ($dischash{$showkey} eq '') {
  228:             $showonlyunread = $dischash{$showkey};
  229:         }
  230:     }
  231: 
  232:     if (defined($dischash{$markkey})) {
  233:         unless ($dischash{$markkey} eq '') {
  234:             $showunmark = $dischash{$markkey};
  235:         }
  236:     }
  237: 
  238:     if (defined($dischash{$visitkey})) {
  239:         unless ($dischash{$visitkey} eq '') {
  240:             $visit = $dischash{$visitkey};
  241:         }
  242:     }
  243:     $visit ++;
  244: 
  245:     my $seeid;
  246:     if (($group ne '') && ($mode eq 'board') && 
  247:         ($ressymb =~ m|^bulletin___\d+___adm/wrapper/adm/\Q$cdom\E/\Q$cnum\E/\d+/bulletinboard$|)) {
  248:         if (&check_group_priv($group,'dgp') eq 'ok') {
  249:             $seeid = 1;
  250:         }
  251:     } else {
  252:         $seeid=&Apache::lonnet::allowed('rin',$crs);
  253:     }
  254:     my @discussionitems=();
  255:     my %shown = ();
  256:     my @posteridentity=();
  257: 
  258:     my $current=0;
  259:     my $visible=0;
  260:     my @depth=();
  261:     my @replies = ();
  262:     my %alldiscussion=();
  263:     my %imsitems=();
  264:     my %imsfiles=();
  265:     my %notshown = ();
  266:     my %newitem = ();
  267:     my $maxdepth=0;
  268:     my %anonhash=();
  269:     my $anoncnt=0;
  270:     my $target='';
  271:     unless ($env{'browser.interface'} eq 'textual' ||
  272: 	    $env{'environment.remote'} eq 'off' ) {
  273: 	$target='target="LONcom"';
  274:     }
  275: 
  276:     my $now = time;
  277:     $discinfo{$visitkey} = $visit;
  278: 
  279:     &Apache::lonnet::put('nohist_'.$cid.'_discuss',\%discinfo,$env{'user.domain'},$env{'user.name'});
  280:     &build_posting_display(\%usernamesort,\%subjectsort,\%namesort,\%notshown,\%newitem,\%dischash,\%shown,\%alldiscussion,\%imsitems,\%imsfiles,\%roleinfo,\@discussionitems,\@replies,\@depth,\@posters,\$maxdepth,\$visible,\$newpostsflag,\$current,$status,$viewgrades,$seeid,$prevread,$sortposts,$encsymb,$target,$readkey,$showunmark,$showonlyunread,$totposters,\@rolefilter,\@sectionpick,\@grouppick,$classgroups,$statusfilter,$toggkey,$outputtarget,\%anonhash,$anoncnt,$group);
  281: 
  282:     my $discussion='';
  283:     my $manifestfile;
  284:     my $manifestok=0;
  285:     my $tempexport;
  286:     my $imsresources;
  287:     my $copyresult;
  288: 
  289:     my $function = &Apache::loncommon::get_users_function();
  290:     my $color = &Apache::loncommon::designparm($function.'.tabbg',
  291:                                                     $env{'user.domain'});
  292:     my %lt = &Apache::lonlocal::texthash(
  293:         'cuse' => 'Current discussion settings',
  294:         'allposts' => 'All posts',
  295:         'unread' => 'New posts only',
  296:         'unmark' => 'Unread only',
  297:         'ondisp' => 'Once displayed',
  298:         'onmark' => 'Once marked not NEW',
  299:         'toggoff' => 'Off',
  300:         'toggon' => 'On',
  301:         'disa' => 'Posts to be displayed',
  302:         'npce' => 'Posts cease to be marked "NEW"',
  303:         'epcb' => 'Each post can be toggled read/unread', 
  304:         'chgt' => 'Change',
  305:         'disp' => 'Display',
  306:         'nolo' => 'Not new',
  307:         'togg' => 'Toggle read/unread',
  308:         'aner' => 'An error occurred opening the manifest file.',
  309:         'difo' => 'Discussion for',
  310:         'aerr' => 'An error occurred opening the export file for posting',
  311:         'aysu' => 'Are you sure you want to delete this post?',
  312:         'dpwn' => 'Deleted posts will no longer be visible to you and other students',
  313:         'bwco' => 'but will continue to be visible to your instructor',
  314:         'depo' => 'Deleted posts will no longer be visible to you or anyone else.',
  315:     );
  316: 
  317:     my $currdisp = $lt{'allposts'};
  318:     my $currmark = $lt{'onmark'};
  319:     my $currtogg = $lt{'toggoff'};
  320:     my $dispchange = $lt{'unread'};
  321:     my $markchange = $lt{'ondisp'};
  322:     my $toggchange = $lt{'toggon'};
  323:     my $chglink = '/adm/feedback?modifydisp='.$ressymb;
  324:     my $displinkA = 'onlyunread';
  325:     my $displinkB = 'onlyunmark';
  326:     my $marklink = 'markondisp';
  327:     my $togglink = 'toggon';
  328: 
  329:     if ($markondisp) {
  330:         $currmark = $lt{'ondisp'};
  331:         $markchange = $lt{'onmark'};
  332:         $marklink = 'markonread';
  333:     }
  334: 
  335:     if ($showonlyunread) {
  336:         $currdisp = $lt{'unread'};
  337:         $dispchange = $lt{'allposts'};
  338:         $displinkA = 'allposts';
  339:     }
  340: 
  341:     if ($showunmark) {
  342:         $currdisp = $lt{'unmark'};
  343:         $dispchange = $lt{'unmark'};
  344:         $displinkA='allposts';
  345:         $displinkB='onlyunread';
  346:         $showonlyunread = 0;
  347:     }
  348: 
  349:     if ($dischash{$toggkey}) {
  350:         $currtogg = $lt{'toggon'};
  351:         $toggchange = $lt{'toggoff'};
  352:         $togglink = 'toggoff';
  353:     } 
  354:    
  355:     $chglink .= '&changes='.$displinkA.'_'.$displinkB.'_'.$marklink.'_'.$togglink;
  356: 
  357:     if ($newpostsflag) {
  358:         $chglink .= '&previous='.$prevread;
  359:     }
  360:     $chglink.=&group_args($group);
  361: 
  362:     if ($visible) {
  363: # Print the discusssion
  364:         if ($outputtarget eq 'tex') {
  365:             $discussion.='<tex>{\tiny \vskip 0 mm\noindent\makebox[2 cm][b]{\hrulefill}'.
  366:                          '\textbf{DISCUSSIONS}\makebox[2 cm][b]{\hrulefill}'.
  367:                          '\vskip 0 mm\noindent\textbf{'.$lt{'cuse'}.'}:\vskip 0 mm'.
  368:                          '\noindent\textbf{'.$lt{'disa'}.'}: \textit{'.$currdisp.'}\vskip 0 mm'.
  369:                          '\noindent\textbf{'.$lt{'npce'}.'}: \textit{'.$currmark.'}}</tex>';
  370:         } elsif ($outputtarget eq 'export') {
  371: # Create temporary directory if this is an export
  372:             my $now = time;
  373:             if ((defined($imsextras)) && ($$imsextras{'caller'} eq 'imsexport')) {
  374:                 $tempexport = $$imsextras{'tempexport'};
  375:                 if (!-e $tempexport) {
  376:                     mkdir($tempexport,0700);
  377:                 }
  378:                 $tempexport .= '/'.$$imsextras{'count'};
  379:                 if (!-e $tempexport) {
  380:                     mkdir($tempexport,0700);
  381:                 }
  382:             } else {
  383:                 $tempexport = $Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/ims_exports';
  384:                 if (!-e $tempexport) {
  385:                     mkdir($tempexport,0700);
  386:                 }
  387:                 $tempexport .= '/'.$now;
  388:                 if (!-e $tempexport) {
  389:                     mkdir($tempexport,0700);
  390:                 }
  391:                 $tempexport .= '/'.$env{'user.domain'}.'_'.$env{'user.name'};
  392:             }
  393:             if (!-e $tempexport) {
  394:                 mkdir($tempexport,0700);
  395:             }
  396: # open manifest file
  397:             my $manifest = '/imsmanifest.xml';
  398:             my $manifestfilename = $tempexport.$manifest;
  399:             if ($manifestfile = Apache::File->new('>'.$manifestfilename)) {
  400:                 $manifestok=1;
  401:                 print $manifestfile qq|
  402: <?xml version="1.0" encoding="UTF-8"?>
  403: <manifest xmlns="http://www.imsglobal.org/xsd/imscp_v1p1" xmlns:imsmd="http://www.imsglobal.org/xsd/imsmd_v1p2" 
  404: xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
  405: identifier="MANIFEST-$ressymb" xsi:schemaLocation="http://www.imsglobal.org/xsd/imscp_v1p1 
  406: imscp_v1p1.xsd http://www.imsglobal.org/xsd/imsmd_v1p2 imsmd_v1p2p2.xsd">
  407:   <organizations default="$ressymb">
  408:     <organization identifier="$ressymb">
  409:       <title>$lt{'difo'} $ressymb</title>\n|;
  410:             } else {
  411:                 $discussion .= $lt{'aner'}.'<br />';
  412:             }
  413: 	} else {
  414:             my $colspan=$maxdepth+1;
  415:             $discussion.= qq|
  416: <script>
  417:    function verifydelete (caller,symb,idx,newflag,previous,groupparm) {
  418:        var symbparm = symb+':::'+idx
  419:        var prevparm = ""
  420:        if (newflag == 1) {
  421:            prevparm = "&previous="+previous
  422:        }
  423:        if (caller == 'studentdelete') {
  424:            if (confirm("$lt{'aysu'}\\n$lt{'dpwn'},\\n$lt{'bwco'}")) {
  425:                document.location.href = "/adm/feedback?hide="+symbparm+prevparm+groupparm
  426:            }
  427:        } else {
  428:            if (caller == 'seeiddelete') {
  429:                if (confirm("$lt{'aysu'}\\n$lt{'depo'}")) {
  430:                    document.location.href = "/adm/feedback?deldisc="+symbparm+prevparm+groupparm
  431:                }
  432:            }
  433:        }
  434:    }
  435: </script>
  436:             |;
  437: 	    $discussion.='<form name="readchoices" method="post" action="/adm/feedback?chgreads='.$ressymb.'" ><table bgcolor="#AAAAAA" cellpadding="2" cellspacing="2" border="0">';
  438:             $discussion .= &action_links_bar($colspan,$ressymb,$visible,
  439:                                              $newpostsflag,$group,
  440:                                              $prevread,$markondisp);
  441:             my $escsymb=&escape($ressymb);
  442:             my $numhidden = keys(%notshown);
  443:             if ($numhidden > 0) {
  444:                 my $colspan = $maxdepth+1;
  445:                 $discussion.="\n".'<tr><td bgcolor="#CCCCCC" colspan="'.$colspan.'">'.
  446:                          '<a href="/adm/feedback?allposts=1&amp;symb='.$escsymb;
  447:                 if ($newpostsflag) {
  448:                     $discussion .= '&previous='.$prevread;
  449:                 }
  450: 		$discussion .= &group_args($group);
  451:                 $discussion .= '">'.&mt('Show all posts').'</a> '.&mt('to display').' '.
  452:                          $numhidden.' ';
  453:                 if ($showunmark) {
  454:                     $discussion .= &mt('posts previously marked read');
  455:                 } else {
  456:                     $discussion .= &mt('previously viewed posts');
  457:                 }
  458:                 $discussion .= '<br/></td></tr>';
  459:             }
  460:         }
  461: 
  462: # Choose sort mechanism
  463:         my @showposts = ();
  464:         if ($sortposts eq 'descdate') {
  465:             @showposts = (sort { $b <=> $a } keys(%alldiscussion));
  466:         } elsif ($sortposts eq 'thread') {
  467:             @showposts = (sort { $a <=> $b } keys(%alldiscussion));
  468:         } elsif ($sortposts eq 'subject') {
  469:             foreach my $key (sort(keys(%subjectsort))) {
  470:                 push(@showposts, @{$subjectsort{$key}});
  471:             }
  472:         } elsif ($sortposts eq 'username') {
  473:             foreach my $domain (sort(keys(%usernamesort))) {
  474:                 foreach my $key (sort(keys(%{$usernamesort{$domain}}))) {
  475:                     push(@showposts, @{$usernamesort{$domain}{$key}});
  476:                 }
  477:             }
  478:         } elsif ($sortposts eq 'lastfirst') {
  479:             foreach my $last (sort(keys(%namesort))) {
  480:                  foreach my $key (sort(keys(%{$namesort{$last}}))) {
  481:                      push(@showposts, @{$namesort{$last}{$key}});
  482:                  }
  483:             }
  484:         } else {
  485:             @showposts =  (sort { $a <=> $b } keys(%alldiscussion));
  486:         }
  487:         my $currdepth = 0;
  488:         my $firstidx = $alldiscussion{$showposts[0]};
  489:         foreach my $post (@showposts) {
  490:             unless (($sortposts eq 'thread') || (($sortposts eq '') && ($env{'environment.threadeddiscussion'})) || ($outputtarget eq 'export')) {
  491:                 $alldiscussion{$post} = $post;
  492:             }
  493:             unless ( ($notshown{$alldiscussion{$post}} eq '1') || ($shown{$alldiscussion{$post}} == 0) ) {
  494:                 if ($outputtarget ne 'tex' && $outputtarget ne 'export') {
  495: 		    $discussion.="\n<tr>";
  496: 		}
  497: 	        my $thisdepth=$depth[$alldiscussion{$post}];
  498:                 if ($outputtarget ne 'tex' && $outputtarget ne 'export') {
  499: 		    for (1..$thisdepth) {
  500: 			$discussion.='<td>&nbsp;&nbsp;&nbsp;</td>';
  501: 		    }
  502: 		}
  503: 	        my $colspan=$maxdepth-$thisdepth+1;
  504:                 if ($outputtarget eq 'tex') {
  505: 		    #cleanup block
  506: 		    $discussionitems[$alldiscussion{$post}]=~s/<table([^>]*)>/<table TeXwidth="90 mm">/;
  507: 		    $discussionitems[$alldiscussion{$post}]=~s/<tr([^>]*)><td([^>]*)>/<tr><td TeXwidth="20 mm" align="left">/;
  508:                     my $threadinsert='';
  509:                     if ($thisdepth > 0) {
  510: 			$threadinsert='<br /><strong>Reply: '.$thisdepth.'</strong>';
  511: 		    }
  512: 		    $discussionitems[$alldiscussion{$post}]=~s/<\/td><td([^>]*)>/$threadinsert<\/td><td TeXwidth="65 mm" align="left">/;
  513: 		    $discussionitems[$alldiscussion{$post}]=~s/<a([^>]+)>(Edit|Hide|Delete|Reply|Submissions)<\/a>//g;
  514:                     $discussionitems[$alldiscussion{$post}]=~s/(<b>|<\/b>|<\/a>|<a([^>]+)>)//g;
  515: 
  516: 		    $discussionitems[$alldiscussion{$post}]='<tex>\vskip 0 mm\noindent\makebox[2 cm][b]{\hrulefill}</tex>'.$discussionitems[$alldiscussion{$post}];
  517: 		    $discussion.=$discussionitems[$alldiscussion{$post}];
  518: 		} elsif ($outputtarget eq 'export') {
  519:                     my $postfilename = $alldiscussion{$post}.'-'.$imsitems{$alldiscussion{$post}}{'timestamp'}.'.html';
  520:                     if ($manifestok) {
  521:                         if (($depth[$alldiscussion{$post}] <= $currdepth) && ($alldiscussion{$post} != $firstidx)) {
  522:                             print $manifestfile '  </item>'."\n";
  523:                         }
  524:                         $currdepth = $depth[$alldiscussion{$post}];
  525:                         print $manifestfile "\n". 
  526:       '<item identifier="ITEM-'.$ressymb.'-'.$alldiscussion{$post}.'" isvisible="'.
  527:         $imsitems{$alldiscussion{$post}}{'isvisible'}.'" identifieref="RES-'.$ressymb.'-'.$alldiscussion{$post}.'">'.
  528:         '<title>'.$imsitems{$alldiscussion{$post}}{'title'}.'</title>';
  529:                         $imsresources .= "\n".
  530:     '<resource identifier="RES-'.$ressymb.'-'.$alldiscussion{$post}.'" type="webcontent" href="'.$postfilename.'">'."\n".
  531:       '<file href="'.$postfilename.'">'."\n".
  532:       $imsfiles{$alldiscussion{$post}}{$imsitems{$alldiscussion{$post}}{'currversion'}}."\n".
  533:     '</resource>';
  534:                     }
  535:                     my $postingfile;
  536:                     my $postingfilename = $tempexport.'/'.$postfilename;
  537:                     if ($postingfile = Apache::File->new('>'.$postingfilename)) {
  538:                         print $postingfile '<html><head><title>Discussion Post</title></head><body>'.
  539:                                            $imsitems{$alldiscussion{$post}}{'title'}.' '.
  540:                                            $imsitems{$alldiscussion{$post}}{'sender'}.
  541:                                            $imsitems{$alldiscussion{$post}}{'timestamp'}.'<br /><br />'.
  542:                                            $imsitems{$alldiscussion{$post}}{'message'}.'<br />'.
  543:                                            $imsitems{$alldiscussion{$post}}{'attach'}.'</body></html>'."\n"; 
  544:                         close($postingfile);
  545:                     } else {
  546:                         $discussion .= $lt{'aerr'}.' '.$alldiscussion{$post}.'<br />';
  547:                     }
  548:                     $copyresult.=&replicate_attachments($imsitems{$alldiscussion{$post}}{'allattachments'},$tempexport);
  549:                 } else {
  550:                     $discussion.='<td  bgcolor="'.$bgcols[$newitem{$alldiscussion{$post}}].
  551:                        '" colspan="'.$colspan.'">'. $discussionitems[$alldiscussion{$post}].
  552:                        '</td></tr>';
  553:                 }
  554: 	    }
  555:         }
  556: 	unless ($outputtarget eq 'tex' || $outputtarget eq 'export') {
  557:             my $colspan=$maxdepth+1;
  558:             $discussion .= <<END;
  559:             <tr bgcolor="#FFFFFF">
  560:              <td colspan="$colspan" valign="top">
  561:               <table border="0" bgcolor="#FFFFFF" width="100%" cellspacing="2" cellpadding="2">
  562:                <tr>
  563:                 <td align="left">
  564:                  <table border="0" cellpadding="0" cellspacing="4">
  565:                   <tr>
  566:                    <td>
  567:                     <font size="-1"><b>$lt{'cuse'}</b>:</td>
  568:                    <td>&nbsp;</td>
  569:                    <td><font size="-1">
  570: END
  571:             if ($newpostsflag) {
  572:                 $discussion .= 
  573:                    '1.&nbsp;'.$lt{'disp'}.'&nbsp;-&nbsp;<i>'.$currdisp.'</i>&nbsp;&nbsp;2.&nbsp;'.$lt{'nolo'}.'&nbsp;-&nbsp;<i>'.$currmark.'</i>';
  574:                 if ($dischash{$toggkey}) {
  575:                    $discussion .= '&nbsp;&nbsp;3.&nbsp;'.$lt{'togg'}.'&nbsp;-&nbsp;<i>'.$currtogg.'</i>';
  576:                 }
  577:             } else {
  578:                 if ($dischash{$toggkey}) {
  579:                    $discussion .= '1.&nbsp;'.$lt{'disp'}.'&nbsp;-&nbsp;<i>'.$currdisp.'</i>&nbsp;2.&nbsp;'.$lt{'togg'}.'&nbsp;-&nbsp;<i>'.$currtogg.'</i>';
  580:                 } else {
  581:                     $discussion .=
  582:                          $lt{'disp'}.'&nbsp;-&nbsp;<i>'.$currdisp.'</i>';
  583:                 }
  584:             }
  585:             $discussion .= <<END;
  586:                    </font></td>
  587:                    <td>&nbsp;</td>
  588:                    <td align="left">
  589:                     <font size="-1"><b><a href="$chglink">$lt{'chgt'}</a>?</font></b>
  590:                    </td>
  591:                   </tr>
  592:                  </table>
  593:                 </td>
  594: END
  595:             if ($sortposts) {
  596:                 my %sort_types = ();
  597:                 my %role_types = ();
  598:                 my %status_types = ();
  599:                 &sort_filter_names(\%sort_types,\%role_types,\%status_types);
  600: 
  601:                 $discussion .= '<td><font size="-1"><b>'.&mt('Sorted by').'</b>: '.$sort_types{$sortposts}.'<br />';
  602:                 if (defined($env{'form.totposters'})) {
  603:                     $discussion .= &mt('Posts by').':';
  604:                     if ($totposters > 0) {
  605:                         foreach my $poster (@posters) {
  606:                             $discussion .= ' '.$poster.',';
  607:                         }
  608:                         $discussion =~ s/,$//;
  609:                     } else {
  610:                         $discussion .= &mt('None selected');
  611:                     }
  612:                 } else {
  613:                     my $filterchoice ='';
  614:                     if (@sectionpick > 0) {
  615:                         $filterchoice = '<i>'.&mt('sections').'</i>-&nbsp;'.$env{'form.sectionpick'};
  616:                         $filterchoice .= '&nbsp;&nbsp;&nbsp; ';
  617:                     }
  618:                     if (@grouppick > 0) {
  619:                         $filterchoice = '<i>'.&mt('groups').'</i>-&nbsp;'.$env{'form.grouppick'};
  620:                         $filterchoice .= '&nbsp;&nbsp;&nbsp; ';
  621:                     }
  622:                     if (@rolefilter > 0) {
  623:                         $filterchoice .= '<i>'.&mt('roles').'</i>-';
  624:                         foreach my $role (@rolefilter) {
  625:                             $filterchoice .= '&nbsp;'.$role_types{$role}.',';
  626:                         }
  627:                         $filterchoice =~ s/,$//;
  628:                         $filterchoice .= '<br />&nbsp;&nbsp&nbsp;&nbsp;&nbsp;&nbsp;&nbsp&nbsp;';
  629:                     }
  630:                     if ($statusfilter) {
  631:                         $filterchoice .= '<i>'.&mt('status').'</i>-&nbsp;'.$status_types{$statusfilter};
  632:                     }
  633:                     if ($filterchoice) {
  634:                         $discussion .= '<b>'.&mt('Filters').'</b>:&nbsp;'.$filterchoice;
  635:                     }
  636:                     $discussion .= '</font></td>';
  637:                 }
  638:             }
  639:             if ($dischash{$toggkey}) {
  640:                 my $storebutton = &mt('Store read/unread changes');
  641:                 $discussion.='<td align="right">'.
  642:               '<input type="hidden" name="discsymb" value="'.$ressymb.'">'."\n".
  643:               '<input type="button" name="readoptions" value="'.$storebutton.'"'.
  644:               ' onClick="this.form.submit();">'."\n".
  645:               '</td>';
  646:             }
  647:             $discussion .= (<<END);
  648:                </tr>
  649:               </table>
  650:              </td>
  651:             </tr>
  652: END
  653:             $discussion .= &action_links_bar($colspan,$ressymb,$visible,
  654:                                              $newpostsflag,$group,
  655:                                              $prevread,$markondisp);
  656:             $discussion .= "
  657:            </table>
  658:            <br /><br /></form>\n";
  659:         } 
  660:         if ($outputtarget eq 'export') {
  661:             if ($manifestok) {
  662:                 while ($currdepth > 0) {
  663:                     print $manifestfile "    </item>\n";
  664:                     $currdepth --;
  665:                 }
  666:                 print $manifestfile qq|
  667:     </organization>
  668:   </organizations>
  669:   <resources>
  670:     $imsresources
  671:   </resources>
  672: </manifest>
  673:                 |;
  674:                 close($manifestfile);
  675:                 if ((defined($imsextras)) && ($$imsextras{'caller'} eq 'imsexport')) {
  676:                     $discussion = $copyresult;
  677:                 } else {
  678: 
  679: #Create zip file in prtspool
  680: 
  681:                     my $imszipfile = '/prtspool/'.
  682:                     $env{'user.name'}.'_'.$env{'user.domain'}.'_'.
  683:                          time.'_'.rand(1000000000).'.zip';
  684:                     my $cwd = &getcwd(); 
  685:                     my $imszip = '/home/httpd/'.$imszipfile;
  686:                     chdir $tempexport;
  687:                     open(OUTPUT, "zip -r $imszip *  2> /dev/null |");
  688:                     close(OUTPUT);
  689:                     chdir $cwd;
  690:                     $discussion .= &mt('Download the zip file from [_1]Discussion Posting Archive','<a href="'.$imszipfile.'">').'</a><br />';
  691:                     if ($copyresult) {
  692:                         $discussion .= &mt('The following errors occurred during export').' - <br />'.$copyresult;
  693:                     }
  694:                 }
  695:             } else {
  696:                 $discussion .= '<br />'.&mt('Unfortunately you will not be able to retrieve an archive of the discussion posts at this time, because there was a problem creating a manifest file.').'<br />';
  697:             }
  698:             return $discussion;
  699:         }
  700:     }
  701:     if ($discussiononly) {
  702:         my $now = time;
  703:         my $attachnum = 0;
  704:         my $currnewattach = [];
  705:         my $currdelold = [];
  706:         my $comment = '';
  707:         my $subject = '';
  708:         if ($env{'form.origpage'}) {
  709:             &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['addnewattach','deloldattach','delnewattach','timestamp','idx','subject','comment']);
  710:             $subject = &unescape($env{'form.subject'});
  711:             $comment = &unescape($env{'form.comment'});
  712:             my @keepold = ();
  713:             &process_attachments($currnewattach,$currdelold,\@keepold);
  714:             if (@{$currnewattach} > 0) {
  715:                 $attachnum += @{$currnewattach};
  716:             }
  717:         }
  718: 	if (&discussion_open($status)) {
  719:             if (($group ne '') && ($mode eq 'board')) {  
  720:                 if (&check_group_priv($group,'pgd') eq 'ok') {
  721:                     $discussion .=
  722: 			&postingform_display($mode,$ressymb,$now,$subject,
  723: 					     $comment,$outputtarget,$attachnum,
  724: 					     $currnewattach,$currdelold,
  725: 					     $group);
  726:                 }
  727:             } else {
  728: 	        $discussion.= 
  729: 		    &postingform_display($mode,$ressymb,$now,$subject,
  730: 					 $comment,$outputtarget,$attachnum,
  731: 					 $currnewattach,$currdelold);
  732:             }
  733: 	}
  734:     } else {
  735:         $discussion.='<table class="LC_feedback_link"><tr><td>';
  736:         if (&discussion_open($status) &&
  737:             &Apache::lonnet::allowed('pch',
  738:     	        $env{'request.course.id'}.
  739: 	        ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))) {
  740: 	    if ($outputtarget ne 'tex') {
  741: 		$discussion.= &send_feedback_link($ressymb,$target).
  742:                               '<br />';
  743:             }
  744: 	}
  745:         if ($outputtarget ne 'tex') {
  746: 	    $discussion.= &send_message_link($ressymb);
  747:         }
  748:         $discussion.='</td></tr></table>';
  749:     }
  750:     return $discussion;
  751: }
  752: 
  753: sub send_feedback_link {
  754:     my ($ressymb,$target) = @_;
  755:     my $output = '<span class="LC_feedback_link">'.
  756:                  ' <a href="/adm/feedback?replydisc='.
  757:                  &escape($ressymb).':::" '.$target.'>'.
  758:                  '<img alt="" src="'.
  759:                  &Apache::loncommon::lonhttpdurl('/adm/lonMisc/chat.gif').
  760:                  '" border="0" />'.&mt('Post Discussion').'</a></span>';
  761:     return $output;
  762: }
  763: 
  764: sub send_message_link {
  765:     my ($ressymb) = @_;
  766:     my $output = '<span class="LC_feedback_link">'.
  767:                  '  <a href="/adm/feedback?sendmessageonly=1&amp;symb='.
  768:                  &escape($ressymb).'"><img alt="" src="'.
  769:                  &Apache::loncommon::lonhttpdurl('/adm/lonMisc/feedback.gif').
  770:                  '" border="0" />'.&mt('Send Message').'</a></span>';
  771:     return $output;
  772: }
  773: 
  774: sub action_links_bar {
  775:     my ($colspan,$ressymb,$visible,$newpostsflag,$group,$prevread,$markondisp) = @_;
  776:     my $discussion = '<tr><td bgcolor="#DDDDBB" colspan="'.$colspan.'">'.
  777:                      '<table border="0" width="100%" bgcolor="#DDDDBB"><tr>';
  778:     my $escsymb=&escape($ressymb);
  779:     if ($visible>2) {
  780:         $discussion .= '<td align="left">'.
  781:                        '<a href="/adm/feedback?cmd=threadedon&amp;symb='.$escsymb;
  782:         if ($newpostsflag) {
  783:             $discussion .= '&previous='.$prevread;
  784:         }
  785:         $discussion .= &group_args($group);
  786:         $discussion .='">'.&mt('Threaded View').'</a>&nbsp;&nbsp;'.
  787:                       '<a href="/adm/feedback?cmd=threadedoff&amp;symb='.$escsymb;
  788:         if ($newpostsflag) {
  789:             $discussion .= '&previous='.$prevread;
  790:         }
  791:         $discussion .= &group_args($group);
  792:         $discussion .='">'.&mt('Chronological View').'</a>&nbsp;&nbsp;
  793:                        <a href= "/adm/feedback?cmd=sortfilter&amp;symb='.$escsymb;
  794:         if ($newpostsflag) {
  795:             $discussion .= '&previous='.$prevread;
  796:         }
  797:         $discussion .= &group_args($group);
  798:         $discussion .='">'.&mt('Sorting/Filtering options').'</a>&nbsp;&nbsp';
  799:     } else {
  800:         $discussion .= '<td align="left">';
  801:     }
  802:     $discussion .='<a href= "/adm/feedback?export='.$escsymb;
  803:     if ($newpostsflag) {
  804:         $discussion .= '&previous='.$prevread;
  805:     }
  806:     $discussion .= &group_args($group);
  807:     $discussion .= '">'.&mt('Export').'?</a>&nbsp;&nbsp;</td>';
  808:     if ($newpostsflag) {
  809:         if (!$markondisp) {
  810:             $discussion .='<td align="right"><a href="/adm/preferences?action=changediscussions';
  811:             $discussion .= &group_args($group);
  812:             $discussion .= '">'.
  813:                            &mt('Preferences on what is marked as NEW').
  814:                            '</a><br /><a href="/adm/feedback?markread=1&amp;symb='.$escsymb;
  815:             $discussion .= &group_args($group);
  816:             $discussion .= '">'.&mt('Mark NEW posts no longer new').'</a>';
  817:         } else {
  818:             $discussion .= '<td>&nbsp;</td>';
  819:         }
  820:     } else {
  821:         $discussion .= '<td>&nbsp;</td>';
  822:     }
  823:     $discussion .= '</tr></table></td></tr>';
  824:     return $discussion;
  825: }
  826: 
  827: sub postingform_display {
  828:     my ($mode,$ressymb,$now,$subject,$comment,$outputtarget,$attachnum,
  829:         $currnewattach,$currdelold,$group) = @_;
  830:     my $newattachmsg;
  831:     my %lt = &Apache::lonlocal::texthash(
  832:               'note' => 'Note: in anonymous discussion, your name is visible only to course faculty',
  833:              'title' => 'Title',
  834:              'podi' => 'Post Discussion',
  835:              'poan' => 'Post Anonymous Discussion',
  836:              'newa' => 'New attachments',
  837:     );
  838:     my $postingform = (<<ENDDISCUSS);
  839: <form action="/adm/feedback" method="post" name="mailform" enctype="multipart/form-data"> <input type="submit" name="discuss" value="$lt{'podi'}" />
  840: <input type="submit" name="anondiscuss" value="$lt{'poan'}" /> <input type="hidden" name="symb" value="$ressymb" />
  841: <input type="hidden" name="sendit" value="true" />
  842: <input type="hidden" name="timestamp" value="$now" />
  843: <br /><a name="newpost"></a>
  844: <font size="1">$lt{'note'}</font><br />
  845: <b>$lt{'title'}:</b>&nbsp;<input type="text" name="subject" value="$subject" size="30" /><br /><br />
  846: <textarea name="comment" cols="80" rows="14" wrap="hard">$comment</textarea>
  847: ENDDISCUSS
  848:     if ($env{'form.origpage'}) {
  849:         $postingform .= '<input type="hidden" name="origpage" value="'.
  850:                         $env{'form.origpage'}.'" />'."\n";
  851:         foreach my $att (@{$currnewattach}) {
  852:             $postingform .= '<input type="hidden" name="currnewattach" '.
  853:                             'value="'.$att.'" />'."\n";
  854:         }
  855:     }
  856:     if (exists($env{'form.ref'})) {
  857:         $postingform .= '<input type="hidden" name="ref" value="'.
  858:                         $env{'form.ref'}.'" />';
  859:     }
  860:     if ($group ne '') {
  861:         $postingform .='<input type="hidden" name="group" value="'.$group.'" />';
  862:     }
  863:     my $blockblog = &Apache::loncommon::blocking_status('blogs');
  864:     if (!$blockblog) {
  865:         $postingform .= &add_blog_checkbox();
  866:     }
  867:     $postingform .= "</form>\n";
  868:     if ($outputtarget ne 'tex') {
  869:         $postingform .= &generate_attachments_button('',$attachnum,$ressymb,
  870:                                                      $now,$currnewattach,
  871:                                                      $currdelold,'',$mode,
  872:                                                      $blockblog);
  873:         if ((ref($currnewattach) eq 'ARRAY') && (@{$currnewattach} > 0)) {
  874:             $newattachmsg = '<br /><b>'.$lt{'newa'}.'</b><br />';
  875:             if (@{$currnewattach} > 1) {
  876:                 $newattachmsg .= '<ol>';
  877:                 foreach my $item (@{$currnewattach}) {
  878:                     $item =~ m#.*/([^/]+)$#;
  879:                     $newattachmsg .= '<li><a href="'.$item.'">'.$1.'</a></li>'."\n";
  880:                 }
  881:                 $newattachmsg .= '</ol>'."\n";
  882:             } else {
  883:                 $$currnewattach[0] =~ m#.*/([^/]+)$#;
  884:                 $newattachmsg .= '<a href="'.$$currnewattach[0].'">'.$1.'</a><br />'."\n";
  885:             }
  886:         }
  887:         $postingform .= $newattachmsg;
  888:         $postingform .= &generate_preview_button();
  889:     }
  890:     return $postingform;
  891: }
  892: 
  893: sub build_posting_display {
  894:     my ($usernamesort,$subjectsort,$namesort,$notshown,$newitem,$dischash,$shown,$alldiscussion,$imsitems,$imsfiles,$roleinfo,$discussionitems,$replies,$depth,$posters,$maxdepth,$visible,$newpostsflag,$current,$status,$viewgrades,$seeid,$prevread,$sortposts,$ressymb,$target,$readkey,$showunmark,$showonlyunread,$totposters,$rolefilter,$sectionpick,$grouppick,$classgroups,$statusfilter,$toggkey,$outputtarget,$anonhash,$anoncnt,$group) = @_;
  895:     my @original=();
  896:     my @index=();
  897:     my $skip_group_check = 0;
  898:     my $symb=&Apache::lonenc::check_decrypt($ressymb);
  899:     my $escsymb=&escape($ressymb);
  900:     my %contrib=&Apache::lonnet::restore($symb,$env{'request.course.id'},
  901: 			  $env{'course.'.$env{'request.course.id'}.'.domain'},
  902: 			  $env{'course.'.$env{'request.course.id'}.'.num'});
  903: 
  904:     if ((@{$grouppick} == 0) || (grep(/^all$/,@{$grouppick}))) {
  905:         $skip_group_check = 1;
  906:     }
  907:     if ($contrib{'version'}) {
  908:         my $oldest = $contrib{'1:timestamp'};
  909:         if ($prevread eq '0') {
  910:             $prevread = $oldest-1;
  911:         }
  912:         my ($skiptest,$rolematch,$roleregexp,$secregexp,$statusregexp);
  913:         if ($sortposts) {
  914:             ($skiptest,$roleregexp,$secregexp,$statusregexp) = 
  915:                      &filter_regexp($rolefilter,$sectionpick,$statusfilter);
  916:             $rolematch = $roleregexp.':'.$secregexp.':'.$statusregexp;
  917:         } 
  918: 	for (my $id=1;$id<=$contrib{'version'};$id++) {
  919: 	    my $idx=$id;
  920:             my $posttime = $contrib{$idx.':timestamp'};
  921:             if ($prevread <= $posttime) {
  922:                 $$newpostsflag = 1;
  923:             }
  924: 	    my $hidden=($contrib{'hidden'}=~/\.$idx\./);
  925:             my $studenthidden=($contrib{'studenthidden'}=~/\.$idx\./);
  926: 	    my $deleted=($contrib{'deleted'}=~/\.$idx\./);
  927: 	    my $origindex='0.';
  928:             my $numoldver=0;
  929: 	    if ($contrib{$idx.':replyto'}) {
  930:                 if ( (($env{'environment.threadeddiscussion'}) && ($sortposts eq '')) || ($sortposts eq 'thread') || ($outputtarget eq 'export')) {
  931: # this is a follow-up message
  932: 		    $original[$idx]=$original[$contrib{$idx.':replyto'}];
  933: 		    $$depth[$idx]=$$depth[$contrib{$idx.':replyto'}]+1;
  934: 		    $origindex=$index[$contrib{$idx.':replyto'}];
  935: 		    if ($$depth[$idx]>$$maxdepth) { $$maxdepth=$$depth[$idx]; }
  936:                 } else {
  937:                     $original[$idx]=0;
  938:                     $$depth[$idx]=0;
  939:                 }
  940: 	    } else {
  941: # this is an original message
  942: 		$original[$idx]=0;
  943: 		$$depth[$idx]=0;
  944: 	    }
  945: 	    if ($$replies[$$depth[$idx]]) {
  946: 		$$replies[$$depth[$idx]]++;
  947: 	    } else {
  948: 		$$replies[$$depth[$idx]]=1;
  949: 	    }
  950: 	    unless ((($hidden) && (!$seeid)) || ($deleted)) {
  951: 		$$visible++;
  952:                 if ($contrib{$idx.':history'}) {
  953:                     if ($contrib{$idx.':history'} =~ /:/) {
  954:                         my @oldversions = split(/:/,$contrib{$idx.':history'});
  955:                         $numoldver = @oldversions;
  956:                     } else {
  957:                         $numoldver = 1;
  958:                     } 
  959:                 }
  960:                 $$current = $numoldver;
  961: 		my %messages = ();
  962:                 my %subjects = ();
  963:                 my %attachtxt = ();
  964:                 my %allattachments = ();
  965:                 my ($screenname,$plainname);
  966:                 my $sender = &mt('Anonymous');
  967: # Anonymous users getting number within a discussion
  968: # Since idx is in static order, this should give the same sequence every time. 
  969: 		my $key=$contrib{$idx.':sendername'}.'@'.$contrib{$idx.':senderdomain'};
  970: 		unless ($$anonhash{$key}) {
  971:                     $anoncnt++;
  972: 		    $$anonhash{$key}=&mt('Anonymous').' '.$anoncnt;
  973: 		}
  974:                 my ($message,$subject,$vgrlink,$ctlink);
  975:                 &get_post_contents(\%contrib,$idx,$seeid,$outputtarget,\%messages,\%subjects,\%allattachments,\%attachtxt,$imsfiles,\$screenname,\$plainname,$numoldver);
  976: 
  977: 
  978: # Set up for sorting by subject
  979:                 unless ($outputtarget eq 'export') {
  980:                     $message=$messages{$numoldver};
  981:                     $message.=$attachtxt{$numoldver};
  982:                     $subject=$subjects{$numoldver};
  983:                     if ($message) {
  984: 	  	        if ($hidden) {
  985: 			    $message='<font color="#888888">'.$message.'</font>';
  986:                             if ($studenthidden) {
  987:                                 $message .='<br /><br />Deleted by poster (student).';
  988:                             }
  989: 		        }
  990: 
  991:                         if ($subject eq '') {
  992:                            if (defined($$subjectsort{'__No subject'})) {
  993:                                push(@{$$subjectsort{'__No subject'}}, $idx);
  994:                            } else {
  995:                                @{$$subjectsort{'__No subject'}} = ("$idx");
  996:                            }
  997:                         } else {
  998:                             if (defined($$subjectsort{$subject})) {
  999:                                push(@{$$subjectsort{$subject}}, $idx);
 1000:                             } else {
 1001:                                @{$$subjectsort{$subject}} = ("$idx");
 1002:                             }
 1003:                         }
 1004: 		        if ((!$contrib{$idx.':anonymous'}) || (&Apache::lonnet::allowed('rin',$env{'request.course.id'}.($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:'')))) {
 1005: 			    $sender=&Apache::loncommon::aboutmewrapper(
 1006: 					 $plainname,
 1007: 					 $contrib{$idx.':sendername'},
 1008: 					 $contrib{$idx.':senderdomain'}).' ('.
 1009: 					 $contrib{$idx.':sendername'}.' at '.
 1010: 					 $contrib{$idx.':senderdomain'}.')';
 1011: 			    if ($contrib{$idx.':anonymous'}) {
 1012: 			        $sender.=' <font color="red"><b>['.$$anonhash{$key}.']</b></font> '.
 1013: 				    $screenname;
 1014: 			    }
 1015: 
 1016: # Set up for sorting by domain, then username
 1017:                             unless (defined($$usernamesort{$contrib{$idx.':senderdomain'}})) {
 1018:                                 %{$$usernamesort{$contrib{$idx.':senderdomain'}}} = ();
 1019:                             }
 1020:                             if (defined($$usernamesort{$contrib{$idx.':senderdomain'}}{$contrib{$idx.':sendername'}})) {
 1021:                                 push(@{$$usernamesort{$contrib{$idx.':senderdomain'}}{$contrib{$idx.':sendername'}}}, $idx);
 1022:                             } else {
 1023:                                 @{$$usernamesort{$contrib{$idx.':senderdomain'}}{$contrib{$idx.':sendername'}}} = ("$idx");
 1024:                             }
 1025: # Set up for sorting by last name, then first name
 1026:                             my %names = &Apache::lonnet::get('environment',
 1027:                                  ['firstname','lastname'],$contrib{$idx.':senderdomain'},
 1028:                                   ,$contrib{$idx.':sendername'});
 1029:                             my $lastname = $names{'lastname'};
 1030:                             my $firstname = $names{'firstname'};
 1031:                             if ($lastname eq '') {
 1032:                                 $lastname = '_';
 1033:                             }
 1034:                             if ($firstname eq '') {
 1035:                                 $firstname = '_';
 1036:                             }
 1037:                             unless (defined($$namesort{$lastname})) {
 1038:                                 %{$$namesort{$lastname}} = ();
 1039:                             }
 1040:                             if (defined($$namesort{$lastname}{$firstname})) {
 1041:                                 push(@{$$namesort{$lastname}{$firstname}}, $idx);
 1042:                             } else {
 1043:                                 @{$$namesort{$lastname}{$firstname}} = ("$idx");
 1044:                             }
 1045:                             if (&editing_allowed($escsymb.':::'.$idx,$group)) {
 1046:                                 if (($env{'user.domain'} eq $contrib{$idx.':senderdomain'}) && ($env{'user.name'} eq $contrib{$idx.':sendername'})) {
 1047:                                     $sender.=' <a href="/adm/feedback?editdisc='.
 1048:                                          $escsymb.':::'.$idx;
 1049:                                     if ($$newpostsflag) {
 1050:                                         $sender .= '&previous='.$prevread;
 1051:                                     }
 1052: 				    $sender .= &group_args($group);
 1053:                                     $sender .= '" '.$target.'>'.&mt('Edit').'</a>';
 1054:                                     
 1055:                                     unless ($seeid) {
 1056:                                         my $grpargs = &group_args($group);
 1057:                                         $sender.=" <a href=\"javascript:verifydelete('studentdelete','$escsymb','$idx','$$newpostsflag','$prevread','$grpargs')";
 1058:                                         $sender .= '">'.&mt('Delete').'</a>';
 1059:                                     }
 1060:                                 }
 1061:                             } 
 1062: 			    if ($seeid) {
 1063: 			        if ($hidden) {
 1064:                                     unless ($studenthidden) {
 1065: 			                $sender.=' <a href="/adm/feedback?unhide='.
 1066: 				                $escsymb.':::'.$idx;
 1067:                                         if ($$newpostsflag) {
 1068:                                             $sender .= '&previous='.$prevread;
 1069:                                         }
 1070:                                         $sender .= '">'.&mt('Make Visible').'</a>';
 1071:                                     }
 1072: 			        } else {
 1073: 				    $sender.=' <a href="/adm/feedback?hide='.
 1074: 				        $escsymb.':::'.$idx;
 1075:                                     if ($$newpostsflag) {
 1076:                                         $sender .= '&previous='.$prevread;
 1077:                                     }
 1078: 				    $sender .= &group_args($group);
 1079:                                     $sender .= '">'.&mt('Hide').'</a>';
 1080: 			        }
 1081:                                 my $grpargs = &group_args($group);
 1082: 			        $sender.= 
 1083:                                     " <a href=\"javascript:verifydelete('seeiddelete','$escsymb','$idx','$$newpostsflag','$prevread','$grpargs')\">";
 1084:                                 $sender .= &mt('Delete').'</a>';
 1085:                             }
 1086: 		        } else {
 1087: 			    if ($screenname) {
 1088: 			        $sender='<i>'.$screenname.'</i>';
 1089: 			    } else {
 1090: 				$sender='<i>'.$$anonhash{$key}.'</i>';
 1091: 			    }
 1092: # Set up for sorting by domain, then username for anonymous
 1093:                             unless (defined($$usernamesort{'__anon'})) {
 1094:                                 %{$$usernamesort{'__anon'}} = ();
 1095:                             }
 1096:                             if (defined($$usernamesort{'__anon'}{'__anon'})) {
 1097:                                 push(@{$$usernamesort{'__anon'}{'__anon'}}, $idx);
 1098:                             } else {
 1099:                                 @{$$usernamesort{'__anon'}{'__anon'}} = ("$idx");
 1100:                             }
 1101: # Set up for sorting by last name, then first name for anonymous
 1102:                             unless (defined($$namesort{'__anon'})) {
 1103:                                 %{$$namesort{'__anon'}} = ();
 1104:                             }
 1105:                             if (defined($$namesort{'__anon'}{'__anon'})) {
 1106:                                 push(@{$$namesort{'__anon'}{'__anon'}}, $idx);
 1107:                             } else {
 1108:                                 @{$$namesort{'__anon'}{'__anon'}} = ("$idx");
 1109:                             }
 1110: 		        }
 1111: 		        if (&discussion_open($status)) {
 1112:                             if (($group ne '') && 
 1113:                                 (&check_group_priv($group,'pgd') eq 'ok')) {
 1114:                                  $sender.=' <a href="/adm/feedback?replydisc='.
 1115:                                           $escsymb.':::'.$idx;
 1116:                                 if ($$newpostsflag) {
 1117:                                     $sender .= '&previous='.$prevread;
 1118:                                 }
 1119:                                 $sender .= &group_args($group);
 1120:                                 $sender .= '" '.$target.'>'.&mt('Reply').'</a>';
 1121:                             } elsif (&Apache::lonnet::allowed('pch', 
 1122: 				 $env{'request.course.id'}.
 1123: 				 ($env{'request.course.sec'}?'/'.
 1124:                                   $env{'request.course.sec'}:''))) {
 1125: 			         $sender.=' <a href="/adm/feedback?replydisc='.
 1126: 			                  $escsymb.':::'.$idx;
 1127:                                 if ($$newpostsflag) {
 1128:                                     $sender .= '&previous='.$prevread;
 1129:                                 }
 1130:                                 $sender .= '" '.$target.'>'.&mt('Reply').'</a>';
 1131:                             }
 1132:                         }
 1133: 		        if ($viewgrades) {
 1134: 			        $vgrlink=&Apache::loncommon::submlink('Submissions',
 1135:                             $contrib{$idx.':sendername'},$contrib{$idx.':senderdomain'},$ressymb);
 1136: 		        }
 1137:                         if ($$dischash{$readkey}=~/\.$idx\./) { 
 1138:                             $ctlink = '<label><b>'.&mt('Mark unread').'?</b>&nbsp;<input type="checkbox" name="postunread_'.$idx.'" /></label>';
 1139:                         } else {
 1140:                             $ctlink = '<label><b>'.&mt('Mark read').'?</b>&nbsp;<input type="checkbox" name="postread_'.$idx.'" /></label>';
 1141:                         }
 1142:                     }
 1143: #figure out at what position this needs to print
 1144:                 }
 1145:                 if ($outputtarget eq 'export' || $message) {
 1146: 		    my $thisindex=$idx;
 1147: 		    if ( (($env{'environment.threadeddiscussion'}) && ($sortposts eq '')) || ($sortposts eq 'thread') || ($outputtarget eq 'export')) {
 1148: 			$thisindex=$origindex.substr('00'.$$replies[$$depth[$idx]],-2,2);
 1149: 		    }
 1150: 		    $$alldiscussion{$thisindex}=$idx;
 1151:                     $$shown{$idx} = 0;
 1152:                     $index[$idx]=$thisindex;
 1153:                 }
 1154:                 if ($outputtarget eq 'export') {
 1155:                     %{$$imsitems{$idx}} = ();
 1156:                     $$imsitems{$idx}{'isvisible'}='true';
 1157:                     if ($hidden) {
 1158:                         $$imsitems{$idx}{'isvisible'}='false';
 1159:                     }
 1160:                     $$imsitems{$idx}{'title'}=$subjects{$numoldver};
 1161:                     $$imsitems{$idx}{'message'}=$messages{$numoldver};
 1162:                     $$imsitems{$idx}{'attach'}=$attachtxt{$numoldver};
 1163:                     $$imsitems{$idx}{'timestamp'}=$contrib{$idx.':timestamp'};
 1164:                     $$imsitems{$idx}{'sender'}=$plainname.' ('.
 1165:                                          $contrib{$idx.':sendername'}.' at '.
 1166:                                          $contrib{$idx.':senderdomain'}.')';
 1167:                     $$imsitems{$idx}{'isanonymous'}='false';
 1168:                     if ($contrib{$idx.':anonymous'}) {
 1169:                         $$imsitems{$idx}{'isanonymous'}='true';
 1170:                     }
 1171:                     $$imsitems{$idx}{'currversion'}=$numoldver;
 1172:                     %{$$imsitems{$idx}{'allattachments'}}=%allattachments;
 1173:                     unless ($messages{$numoldver} eq '' && $attachtxt{$numoldver} eq '') {
 1174:                         $$shown{$idx} = 1;
 1175:                     }
 1176:                 } else {
 1177:                     if ($message) {
 1178:                         my $spansize = 2;
 1179:                         if ($showonlyunread && $prevread > $posttime) {
 1180:                             $$notshown{$idx} = 1;
 1181:                         } elsif ($showunmark && $$dischash{$readkey}=~/\.$idx\./) {
 1182:                             $$notshown{$idx} = 1;
 1183:                         } else {
 1184: # apply filters
 1185:                             my $uname = $contrib{$idx.':sendername'};
 1186:                             my $udom = $contrib{$idx.':senderdomain'};
 1187:                             my $poster = $uname.':'.$udom;
 1188:                             if ($env{'form.totposters'} ne '') {
 1189:                                 if ($totposters == 0) {
 1190:                                     $$shown{$idx} = 0;
 1191:                                 } elsif ($totposters > 0) {
 1192:                                     if (grep/^$poster$/,@{$posters}) {
 1193:                                         $$shown{$idx} = 1;
 1194:                                     }
 1195:                                 }
 1196:                             } elsif ($sortposts) {
 1197:                                 if ($skiptest) {
 1198:                                     $$shown{$idx} = 1;
 1199:                                 } else {
 1200:                                     foreach my $role (@{$$roleinfo{$poster}}) {
 1201:                                         if ($role =~ /^cc:/) {
 1202:                                             my $cc_regexp = $roleregexp.':[^:]*:'.$statusregexp;
 1203:                                             if ($role =~ /$cc_regexp/) {
 1204:                                                 $$shown{$idx} = 1;
 1205:                                                 last;
 1206:                                             }
 1207:                                         } elsif ($role =~ /^$rolematch$/) {
 1208:                                             $$shown{$idx} = 1;
 1209:                                             last;
 1210:                                         }
 1211:                                     }
 1212:                                 }
 1213:                                 if ($$shown{$idx} && !$skip_group_check) {
 1214:                                     my $showflag = 0;
 1215:                                     if (ref($$classgroups{$poster}{active}) eq 'HASH') {
 1216:                                         foreach my $grp (@{$grouppick}) {
 1217:                                             if (grep/^\Q$grp\E$/,
 1218:                                  keys(%{$$classgroups{$poster}{active}})) {
 1219:                                                 $showflag = 1;
 1220:                                                 last;
 1221:                                             }
 1222:                                         }
 1223:                                     }
 1224:                                     if ($showflag) {
 1225:                                         $$shown{$idx} = 1;
 1226:                                     } else {
 1227:                                         $$shown{$idx} = 0;
 1228:                                     }
 1229:                                 }
 1230:                             } else {
 1231:                                 $$shown{$idx} = 1;
 1232:                             }
 1233:                         }
 1234:                         unless ($$notshown{$idx} == 1) {
 1235:                             if ($prevread > 0 && $prevread <= $posttime) {
 1236:                                 $$newitem{$idx} = 1;
 1237:                                 $$discussionitems[$idx] .= '
 1238:                                  <p><table border="0" width="100%">
 1239:                                   <tr><td align="left"><font color="#FF0000"><b>NEW</b></font></td>';
 1240:                             } else {
 1241:                                 $$newitem{$idx} = 0;
 1242:                                 $$discussionitems[$idx] .= '
 1243:                                  <p><table border="0" width="100%">
 1244:                                   <tr><td align="left">&nbsp;</td>';
 1245:                             }
 1246:                             $$discussionitems[$idx] .= '<td align ="left">&nbsp;&nbsp;'.
 1247:                                 '<b>'.$subject.'</b>&nbsp;&nbsp;'.
 1248:                                 $sender.'</b> '.$vgrlink.' ('.
 1249:                                 &Apache::lonlocal::locallocaltime($posttime).')</td>';
 1250:                             if ($$dischash{$toggkey}) {
 1251:                                 $$discussionitems[$idx].='<td align="right">&nbsp;&nbsp;'.
 1252:                                   $ctlink.'</td>';
 1253:                             }
 1254:                             $$discussionitems[$idx].= '</tr></table><blockquote>'.
 1255:                                     $message.'</blockquote></p>';
 1256:                             if ($contrib{$idx.':history'}) {
 1257:                                 my @postversions = ();
 1258:                                 $$discussionitems[$idx] .= &mt('This post has been edited by the author.');
 1259:                                 if ($seeid) {
 1260:                                     $$discussionitems[$idx] .= '&nbsp;&nbsp;<a href="/adm/feedback?allversions='.$escsymb.':::'.$idx;
 1261: 				    $$discussionitems[$idx] .= &group_args($group);
 1262:                                     $$discussionitems[$idx] .= '">'.&mt('Display all versions').'</a>';
 1263:                                 }
 1264:                                 $$discussionitems[$idx].='<br/>'.&mt('Earlier version(s) were posted on: ');
 1265:                                 if ($contrib{$idx.':history'} =~ m/:/) {
 1266:                                     @postversions = split(/:/,$contrib{$idx.':history'});
 1267:                                 } else {
 1268:                                     @postversions = ("$contrib{$idx.':history'}");
 1269:                                 }
 1270:                                 for (my $i=0; $i<@postversions; $i++) {
 1271:                                     my $version = $i+1;
 1272:                                     $$discussionitems[$idx] .= '<b>'.$version.'.</b> - '.&Apache::lonlocal::locallocaltime($postversions[$i]).'  ';
 1273:                                 }
 1274:                             }
 1275:                         }
 1276:                     }
 1277:                 }
 1278:             }
 1279: 	}
 1280:     }
 1281: }
 1282: 
 1283: sub filter_regexp {
 1284:     my ($rolefilter,$sectionpick,$statusfilter) = @_;
 1285:     my ($roleregexp,$secregexp,$statusregexp);
 1286:     my $skiptest = 1;
 1287:     if (@{$rolefilter} > 0) {
 1288:         my @okrolefilter = ();
 1289:         foreach my $role (@{$rolefilter}) {
 1290:             unless ($role eq '') {
 1291:                 push(@okrolefilter, $role);
 1292:             }
 1293:         }
 1294:         if (@okrolefilter > 0) {
 1295:             if (grep/^all$/,@okrolefilter) {
 1296:                 $roleregexp='[^:]+';
 1297:             } else {
 1298:                 if (@okrolefilter == 1) {
 1299:                     $roleregexp=$okrolefilter[0];
 1300:                 } else {
 1301:                     $roleregexp='('.join('|',@okrolefilter).')';
 1302:                 }
 1303:                 $skiptest = 0;
 1304:             }
 1305:         }
 1306:     }
 1307:     if (@{$sectionpick} > 0) {
 1308:         my @oksectionpick = ();
 1309:         foreach my $sec (@{$sectionpick}) {
 1310:             unless ($sec eq '') {
 1311:                  push(@oksectionpick, $sec);
 1312:             }
 1313:         }
 1314:         if ((@oksectionpick > 0) && (!grep/^all$/,@oksectionpick)) {
 1315:             if (@oksectionpick == 1) {
 1316:                 $secregexp = $oksectionpick[0];
 1317:             } else {
 1318:                 $secregexp .= '('.join('|',@oksectionpick).')';
 1319:             }
 1320:             $skiptest = 0;
 1321:         } else {
 1322:             $secregexp .= '[^:]*';
 1323:         }
 1324:     }
 1325: 
 1326:     if (defined($statusfilter) && $statusfilter ne '') {
 1327:         if ($statusfilter eq 'all') {
 1328:             $statusregexp = '[^:]+';
 1329:         } else {
 1330:             $statusregexp = $statusfilter;
 1331:             $skiptest = 0;
 1332:         }
 1333:     }
 1334:     return ($skiptest,$roleregexp,$secregexp,$statusregexp);
 1335: }
 1336: 
 1337: 
 1338: sub get_post_contents {
 1339:     my ($contrib,$idx,$seeid,$type,$messages,$subjects,$allattachments,$attachtxt,$imsfiles,$screenname,$plainname,$numver) = @_;
 1340:     my $discussion = '';
 1341:     my $start=$numver;
 1342:     my $end=$numver + 1;
 1343:     %{$$imsfiles{$idx}}=();
 1344:     if ($type eq 'allversions') {
 1345:        unless($seeid) {
 1346:            $discussion=&mt('You do not have privileges to view all versions of posts.').' '.&mt('Please select a different role.');
 1347:            return $discussion;
 1348:        } 
 1349:     }
 1350: #    $$screenname=&Apache::loncommon::screenname(
 1351: #                                        $$contrib{$idx.':sendername'},
 1352: #                                        $$contrib{$idx.':senderdomain'});
 1353:     $$plainname=&Apache::loncommon::nickname(
 1354:                                         $$contrib{$idx.':sendername'},
 1355:                                         $$contrib{$idx.':senderdomain'});
 1356:     $$screenname=$$contrib{$idx.':screenname'};
 1357: 
 1358:     my $sender=&Apache::loncommon::aboutmewrapper(
 1359:                                  $$plainname,
 1360:                                  $$contrib{$idx.':sendername'},
 1361:                                  $$contrib{$idx.':senderdomain'}).' ('.
 1362:                                  $$contrib{$idx.':sendername'}.' at '.
 1363:                                  $$contrib{$idx.':senderdomain'}.')';
 1364:     my $attachmenturls = $$contrib{$idx.':attachmenturl'};
 1365:     my @postversions = ();
 1366:     if ($type eq 'allversions' || $type eq 'export') {
 1367:         $start = 0;
 1368:         if ($$contrib{$idx.':history'}) {
 1369: 	    @postversions = split(/:/,$$contrib{$idx.':history'});
 1370:         }
 1371:         &get_post_versions($messages,$$contrib{$idx.':message'},1);
 1372:         &get_post_versions($subjects,$$contrib{$idx.':subject'},1);
 1373:         push(@postversions,$$contrib{$idx.':timestamp'});
 1374:         $end = @postversions;
 1375:     } else {
 1376:         &get_post_versions($messages,$$contrib{$idx.':message'},1,$numver);
 1377:         &get_post_versions($subjects,$$contrib{$idx.':subject'},1,$numver);
 1378:     }
 1379: 
 1380:     if ($$contrib{$idx.':anonymous'}) {
 1381:         $sender.=' ['.&mt('anonymous').'] '.$$screenname;
 1382:     }
 1383:     if ($type eq 'allversions') {
 1384:         $discussion=('<b>'.$sender.'</b><br /><ul>');
 1385:     }
 1386:     for (my $i=$start; $i<$end; $i++) {
 1387:         my ($timesent,$attachmsg);
 1388:         my %currattach = ();
 1389:         $timesent = &Apache::lonlocal::locallocaltime($postversions[$i]);
 1390: 	&newline_to_br(\$messages->{$i});
 1391:         $$messages{$i}=&Apache::lontexconvert::msgtexconverted($$messages{$i});
 1392:         $$subjects{$i}=~s/\n/\<br \/\>/g;
 1393:         $$subjects{$i}=&Apache::lontexconvert::msgtexconverted($$subjects{$i});
 1394:         if ($attachmenturls) {
 1395:             &extract_attachments($attachmenturls,$idx,$i,\$attachmsg,$allattachments,\%currattach);
 1396:         }
 1397:         if ($type eq 'export') {
 1398:             $$imsfiles{$idx}{$i} = '';
 1399:             if ($attachmsg) {
 1400:                 $$attachtxt{$i} = '<br />'.&mt('Attachments').':<br />';
 1401:                 foreach my $key (sort(keys(%currattach))) {
 1402:                     if ($$allattachments{$key}{'filename'} =~ m-^/uploaded/([^/]+/[^/]+)(/feedback)?(/?\d*)/([^/]+)$-) {
 1403:                         my $fname = $1.$3.'/'.$4;
 1404:                         $$imsfiles{$idx}{$i} .= '<file href="'.$fname.'">'."\n";
 1405:                         $$attachtxt{$i}.= '<a href="'.$fname.'">'.$4.'</a><br />';
 1406:                     }
 1407:                 }
 1408:             }
 1409:         } else {
 1410:             if ($attachmsg) {
 1411:                 $$attachtxt{$i} = '<br />'.&mt('Attachments').':'.$attachmsg.'<br />';
 1412:             } else {
 1413:                 $$attachtxt{$i} = '';
 1414:             }
 1415:         }
 1416:         if ($type eq 'allversions') {
 1417:             $discussion.= <<"END";
 1418: <li><b>$$subjects{$i}</b>, $timesent<br />
 1419: $$messages{$i}<br />
 1420: $$attachtxt{$i}</li>
 1421: END
 1422:         }
 1423:     }
 1424:     if ($type eq 'allversions') {
 1425:         $discussion.='</ul>';
 1426:         return $discussion;
 1427:     } else {
 1428:         return;
 1429:     }
 1430: }
 1431: 
 1432: sub replicate_attachments {
 1433:     my ($attachrefs,$tempexport) = @_;
 1434:     my $response;
 1435:     foreach my $id (keys(%{$attachrefs})) {
 1436:         if ($$attachrefs{$id}{'filename'} =~ m-^/uploaded/([^/]+)/([^/]+)(/feedback)?(/?\d*)/([^/]+)$-) {
 1437:             my $path = $tempexport;
 1438:             my $tail = $1.'/'.$2.$4;
 1439:             my @extras = split(/\//,$tail);
 1440:             my $destination = $tempexport.'/'.$1.'/'.$2.$4.'/'.$5;
 1441:             if (!-e $destination) {
 1442:                 my $i= 0;
 1443:                 while ($i<@extras) {
 1444:                     $path .= '/'.$extras[$i];
 1445:                     if (!-e $path) {
 1446:                         mkdir($path,0700);
 1447:                     }
 1448:                     $i ++;
 1449:                 }
 1450:                 my ($content,$rtncode);
 1451:                 my $uploadreply = &Apache::lonnet::getuploaded('GET',$$attachrefs{$id}{'filename'},$1,$2,$content,$rtncode);
 1452:                 if ($uploadreply eq 'ok') {
 1453:                     my $attachcopy;
 1454:                     if ($attachcopy = Apache::File->new('>'.$destination)) {
 1455:                         print $attachcopy $content;
 1456:                         close($attachcopy);
 1457:                     } else {
 1458:                         $response .= &mt('Error copying file attachment - [_1] to IMS package',$5).': '.$!.'<br />'."\n";
 1459:                     }
 1460:                 } else {
 1461:                     &Apache::lonnet::logthis("Replication of attachment failed when building IMS export of discussion posts - domain: $1, course: $2, file: $$attachrefs{$id}{'filename'} -error: $rtncode");
 1462:                     $response .= &mt('Error copying file attachment - [_1] to IMS package: ',$5).$rtncode.'<br />'."\n";
 1463:                 }
 1464:             }
 1465:         }
 1466:     }
 1467:     return $response;
 1468: }
 1469: 
 1470: sub mail_screen {
 1471:   my ($r,$feedurl,$options) = @_;
 1472:   if (exists($env{'form.origpage'})) {
 1473:       &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['subject','comment','currnewattach','addnewattach','deloldattach','delnewattach','timestamp','idx','anondiscuss','discuss','blog','group','ref']);
 1474:   }
 1475: 
 1476:   my %lt = &Apache::lonlocal::texthash(
 1477:             'plch' => 'Please check at least one of the following feedback types:',
 1478:             'myqu' => 'My question/comment/feedback:',
 1479:             'title' => 'Title',
 1480:             'reta' => 'Retained attachments',
 1481:             'atta' => 'Attachment (128 KB max size)',
 1482:            ); 
 1483:   my $title=&Apache::lonnet::gettitle($feedurl);
 1484:   if (!$title) { $title = $feedurl; }
 1485:   my $quote='';
 1486:   my $subject = '';
 1487:   my $comment = '';
 1488:   my $prevtag = '';
 1489:   my $parentmsg = '';
 1490:   my ($symb,$idx,$attachmenturls);
 1491:   my $numoldver = 0;
 1492:   my $attachmsg = '';
 1493:   my $newattachmsg = '';
 1494:   my @currnewattach = ();
 1495:   my @currdelold = ();
 1496:   my @keepold = ();
 1497:   my %attachments = ();
 1498:   my %currattach = ();
 1499:   my $attachnum = 0;
 1500:   my $anonchk = (<<END);
 1501:   function anonchk() {
 1502:       for (var i=0; i < document.mailform.discuss.length; i++) {
 1503: 	  if (document.mailform.discuss[i].checked) {
 1504: 	      document.attachment.discuss.value = 
 1505: 		  document.mailform.discuss[i].value;
 1506: 	  }
 1507:       }
 1508:       if (document.mailform.blog.checked) {
 1509: 	  document.attachment.blog.value = 1;
 1510:       }
 1511:      return
 1512:    }
 1513: END
 1514:   my $anonscript;
 1515:   if (exists($env{'form.origpage'})) {
 1516:       $anonscript = (<<END);
 1517:   function setposttype() {
 1518:       var disc = "$env{'form.discuss'}";
 1519:       for (var i=0; i < document.mailform.discuss.length; i++) {
 1520: 	  if (disc == document.mailform.discuss[i].value) {
 1521: 	      document.mailform.discuss[i].checked = 1;
 1522: 	  }
 1523:       }
 1524:       var blog = "$env{'form.blog'}";
 1525:       if (blog == 1) {
 1526:           document.mailform.blog.checked=1;
 1527:       }
 1528:       return
 1529:   }
 1530: END
 1531:   } else {
 1532:       $anonscript = (<<END);
 1533:   function setposttype() {
 1534:       return
 1535:   }
 1536: END
 1537:   }
 1538:   if (($env{'form.replydisc'}) || ($env{'form.editdisc'})) {
 1539:       if ($env{'form.replydisc'}) {
 1540:           ($symb,$idx)=split(/\:\:\:/,$env{'form.replydisc'});
 1541:       } else {
 1542:           ($symb,$idx)=split(/\:\:\:/,$env{'form.editdisc'});
 1543:       }
 1544:       my %contrib=&Apache::lonnet::restore($symb,$env{'request.course.id'},
 1545: 					   $env{'course.'.$env{'request.course.id'}.'.domain'},
 1546: 					   $env{'course.'.$env{'request.course.id'}.'.num'});
 1547:       unless (($contrib{'hidden'}=~/\.$idx\./) || ($contrib{'deleted'}=~/\.$idx\./)) {
 1548:           if ($contrib{$idx.':history'}) {
 1549:               if ($contrib{$idx.':history'} =~ /:/) {
 1550:                   my @oldversions = split(/:/,$contrib{$idx.':history'});
 1551:                   $numoldver = @oldversions;
 1552:               } else {
 1553:                   $numoldver = 1;
 1554:               }
 1555:           }
 1556:           if ($env{'form.replydisc'}) {
 1557:               if ($contrib{$idx.':history'}) {
 1558:                   if ($contrib{$idx.':history'} =~ /:/) {
 1559:                       my @oldversions = split(/:/,$contrib{$idx.':history'});
 1560:                       $numoldver = @oldversions;
 1561:                   } else {
 1562:                       $numoldver = 1;
 1563:                   }
 1564:               }
 1565:               if ($idx > 0) {
 1566:                   my %msgversions = ();
 1567:                   &get_post_versions(\%msgversions,$contrib{$idx.':message'},0,$numoldver);
 1568:                   $quote = $msgversions{$numoldver};
 1569:               }
 1570:               if ($idx > 0) {
 1571:                   my %subversions = ();
 1572:                   &get_post_versions(\%subversions,$contrib{$idx.':subject'},1,$numoldver);
 1573:                   $subject = &mt('Re: ').$subversions{$numoldver};
 1574:               }
 1575:               $subject = &HTML::Entities::encode($subject,'<>&"');
 1576:           } else {
 1577:               $attachmenturls = $contrib{$idx.':attachmenturl'};
 1578:               if ($idx > 0) {
 1579:                   my %msgversions = ();
 1580:                   &get_post_versions(\%msgversions,$contrib{$idx.':message'},0,$numoldver);
 1581:                   $comment = $msgversions{$numoldver};
 1582:                   my %subversions = ();
 1583:                   &get_post_versions(\%subversions,$contrib{$idx.':subject'},0,$numoldver);
 1584:                   $subject = $subversions{$numoldver}; 
 1585:               }
 1586:               if (defined($contrib{$idx.':replyto'})) {
 1587:                   $parentmsg = $contrib{$idx.':replyto'};
 1588:               }
 1589:               unless (exists($env{'form.origpage'})) {
 1590:                   my $anonflag = 'nonanon';
 1591:                   if ($contrib{$idx.':anonymous'}) {
 1592:                       $anonflag = 'anon';
 1593:                   }
 1594:                   $anonscript = (<<END);
 1595:   function setposttype () {
 1596:       var currtype = "$anonflag";
 1597:       for (var i=0; i<document.mailform.discuss.length; i++) {
 1598: 	  if (document.mailform.elements.discuss[i].value == currtype ) {
 1599: 	      document.mailform.elements.discuss[i].checked=1;
 1600: 	  } 
 1601:       }
 1602:       return
 1603:   }
 1604: END
 1605:               }
 1606:           }
 1607:       }
 1608:       if ($env{'form.previous'}) {
 1609:           $prevtag = '<input type="hidden" name="previous" value="'.$env{'form.previous'}.'" />';
 1610:       }
 1611:   }
 1612: 
 1613:   if ($env{'form.origpage'}) {
 1614:       $subject = &unescape($env{'form.subject'});
 1615:       $comment = &unescape($env{'form.comment'});
 1616:       &process_attachments(\@currnewattach,\@currdelold,\@keepold);
 1617:   }
 1618:   my $latexHelp=&Apache::loncommon::helpLatexCheatsheet();
 1619:   my $send=&mt('Send');
 1620:   my $alert = &mt('Please select a feedback type.');
 1621:   my $js= <<END;
 1622: <script type="text/javascript">
 1623: //<!--
 1624:     function gosubmit() {
 1625:         var rec=0;
 1626:         if (typeof(document.mailform.elements.discuss)!="undefined") {
 1627: 	    if (typeof(document.mailform.elements.discuss.length) == "undefined") {
 1628: 		if (document.mailform.elements.discuss.checked ) {
 1629: 		    rec=1;
 1630: 		}
 1631: 	    } else {
 1632: 		for (var i=0; i<document.mailform.elements.discuss.length; i++) {
 1633: 		    if (document.mailform.elements.discuss[i].checked ) {
 1634: 			rec=1;
 1635: 		    } 
 1636: 		}
 1637: 	    }
 1638: 	}
 1639:         if (typeof(document.mailform.elements.blog)!="undefined") {
 1640:           if (document.mailform.elements.blog.checked) {
 1641:              rec=1;
 1642:           } 
 1643:         }
 1644: 
 1645:         if (rec) {
 1646:             if (typeof(document.mailform.onsubmit)=='function') {
 1647: 		document.mailform.onsubmit();
 1648: 	    }
 1649: 	    document.mailform.submit();
 1650:         } else {
 1651:             alert('$alert');
 1652: 	}
 1653:     }
 1654:     $anonchk
 1655:     $anonscript
 1656: //-->
 1657: </script>
 1658: END
 1659: 
 1660:   my %onload = ('onload' => 'window.focus();setposttype();');
 1661:   my $start_page=
 1662:       &Apache::loncommon::start_page('Resource Feedback and Discussion',$js,
 1663: 				     {'add_entries' => \%onload});
 1664: 
 1665:   if ($quote ne '') {
 1666:       &newline_to_br(\$quote);
 1667:       $quote='<blockquote>'.&Apache::lontexconvert::msgtexconverted($quote).'</blockquote>';
 1668:   }
 1669: 
 1670:   $r->print(<<END);
 1671: $start_page
 1672: <h2><tt>$title</tt></h2>
 1673: <form action="/adm/feedback" method="post" name="mailform"
 1674: enctype="multipart/form-data">
 1675: $prevtag
 1676: <input type="hidden" name="postdata" value="$feedurl" />
 1677: END
 1678:   if ($env{'form.replydisc'}) {
 1679:       $r->print(<<END);
 1680: <input type="hidden" name="replydisc" value="$env{'form.replydisc'}" />
 1681: END
 1682:   } elsif ($env{'form.editdisc'}) {
 1683:      $r->print(<<END);
 1684: <input type="hidden" name="editdisc" value ="$env{'form.editdisc'}" />
 1685: <input type="hidden" name="parentmsg" value ="$parentmsg" />
 1686: END
 1687:   }
 1688:   $r->print(<<END);
 1689: $lt{'plch'}
 1690: $options<hr />
 1691: $quote
 1692: <p>$lt{'myqu'}</p>
 1693: <p>
 1694: $latexHelp
 1695: $lt{'title'}: <input type="text" name="subject" size="30" value="$subject" /></p>
 1696: <p>
 1697: <textarea name="comment" id="comment" cols="60" rows="10" wrap="hard">$comment
 1698: </textarea></p>
 1699: <p>
 1700: END
 1701:     if ( ($env{'form.editdisc'}) || ($env{'form.replydisc'}) ) {
 1702:         if ($env{'form.origpage'}) {
 1703:             foreach my $attach (@currnewattach) {
 1704:                 $r->print('<input type="hidden" name="currnewattach" value="'.$attach.'" />'."\n");
 1705:             }
 1706:             foreach my $oldatt (@currdelold) {
 1707:                 $r->print('<input type="hidden" name="deloldattach" value="'.$oldatt.'" />'."\n");
 1708:             }
 1709:         }
 1710:         if ($env{'form.editdisc'}) {
 1711:             if ($attachmenturls) {
 1712:                 &extract_attachments($attachmenturls,$idx,$numoldver,\$attachmsg,\%attachments,\%currattach,\@currdelold);
 1713:                 $attachnum = scalar(keys(%currattach));
 1714:                 foreach my $key (keys(%currattach)) {
 1715:                     $r->print('<input type="hidden" name="keepold" value="'.$key.'" />'."\n");
 1716:                 }
 1717:             }
 1718:         }
 1719:     } else {
 1720:         $r->print(<<END);
 1721: $lt{'atta'}: <input type="file" name="attachment" />
 1722: </p>
 1723: END
 1724:     }
 1725:     if (exists($env{'form.group'})) {
 1726:         $r->print('<input type="hidden" name="group" value="'.$env{'form.group'}.'" />');
 1727:     }
 1728:     if (exists($env{'form.ref'})) {
 1729:         $r->print('<input type="hidden" name="ref" value="'.$env{'form.ref'}.'" />');
 1730:     }
 1731:     $r->print(<<END);
 1732: <p>
 1733: <input type="hidden" name="sendit" value="1" />
 1734: <input type="button" value="$send" onClick='gosubmit();' />
 1735: </p>
 1736: </form>
 1737: END
 1738:     if ($env{'form.editdisc'} || $env{'form.replydisc'}) {
 1739:         my $now = time;
 1740:         my $ressymb = $symb;
 1741:         &Apache::lonenc::check_encrypt(\$ressymb);
 1742:         my $postidx = '';
 1743:         if ($env{'form.editdisc'}) {
 1744:             $postidx = $idx;
 1745:         }
 1746:         if (@currnewattach > 0) {
 1747:             $attachnum += @currnewattach;
 1748:         }
 1749:         my $blockblog = &Apache::loncommon::blocking_status('blogs');
 1750:         $r->print(&generate_attachments_button($postidx,$attachnum,$ressymb,$now,\@currnewattach,\@currdelold,$numoldver,'',$blockblog));
 1751:         if ($attachnum > 0) {
 1752:             if (@currnewattach > 0) {
 1753:                 $newattachmsg .= '<br /><b>'.&mt('New attachments').'</b><br />';
 1754:                 if (@currnewattach > 1) {
 1755:                     $newattachmsg .= '<ol>';
 1756:                     foreach my $item (@currnewattach) {
 1757:                         $item =~ m#.*/([^/]+)$#;
 1758:                         $newattachmsg .= '<li><a href="'.$item.'">'.$1.'</a></li>'."\n";
 1759:                     }
 1760:                     $newattachmsg .= '</ol>'."\n";
 1761:                 } else {
 1762:                     $currnewattach[0] =~ m#.*/([^/]+)$#;
 1763:                     $newattachmsg .= '<a href="'.$currnewattach[0].'">'.$1.'</a><br />'."\n";
 1764:                 }
 1765:             }
 1766:             if ($attachmsg) {
 1767:                 $r->print("<br /><b>$lt{'reta'}</b>:$attachmsg<br />\n");
 1768:             }
 1769:             if ($newattachmsg) {
 1770:                 $r->print("$newattachmsg<br />");
 1771:             }
 1772:         }
 1773:     }
 1774:     $r->print(&generate_preview_button().
 1775:               &Apache::lonhtmlcommon::htmlareaselectactive('comment').
 1776: 	      &Apache::loncommon::end_page());
 1777: 
 1778: }
 1779: 
 1780: sub print_display_options {
 1781:     my ($r,$symb,$previous,$dispchgA,$dispchgB,$markchg,$toggchg,$feedurl) = @_;
 1782:     &Apache::loncommon::content_type($r,'text/html');
 1783:     $r->send_http_header;
 1784: 
 1785:     my $function = &Apache::loncommon::get_users_function();
 1786:     my $tabcolor = &Apache::loncommon::designparm($function.'.tabbg',
 1787:                                                     $env{'user.domain'});
 1788: 
 1789:     my %lt = &Apache::lonlocal::texthash(
 1790:         'pref' => 'Display Preference',
 1791:         'curr' => 'Current setting ',
 1792:         'actn' => 'Action',
 1793:         'deff' => 'Default for all discussions',
 1794:         'prca' => 'Preferences can be set for this discussion that determine ....',
 1795:         'whpo' => 'Which posts are displayed when you display this bulletin board or resource, and',
 1796:         'unwh' => 'Under what circumstances posts are identified as "NEW", and',
 1797:         'wipa' => 'Whether individual posts can be marked as read/unread',
 1798:         'allposts' => 'All posts',
 1799:         'unread' => 'New posts only',
 1800:         'unmark' => 'Posts not marked read',
 1801:         'ondisp' => 'Once displayed',
 1802:         'onmark' => 'Once marked not NEW ',
 1803:         'toggon' => 'Shown',
 1804:         'toggoff' => 'Not shown',
 1805:         'disa' => 'Posts displayed?',
 1806:         'npmr' => 'New posts cease to be identified as "NEW"?',
 1807:         'dotm' => 'Option to mark each post as read/unread?',  
 1808:         'chgt' => 'Change to ',
 1809:         'mkdf' => 'Set to ',
 1810:         'yhni' => 'You have not indicated that you wish to change any of the discussion settings',
 1811:         'ywbr' => 'You will be returned to the previous page if you click OK.'
 1812:     );
 1813: 
 1814:     my $dispchangeA = $lt{'unread'};
 1815:     my $dispchangeB = $lt{'unmark'};
 1816:     my $markchange = $lt{'ondisp'};
 1817:     my $toggchange = $lt{'toggon'};
 1818:     my $currdisp = $lt{'allposts'};
 1819:     my $currmark = $lt{'onmark'};
 1820:     my $discdisp = 'allposts';
 1821:     my $discmark = 'onmark';
 1822:     my $currtogg = $lt{'toggoff'};
 1823:     my $disctogg = 'toggoff';
 1824:                                                                                       
 1825:     if ($dispchgA eq 'allposts') {
 1826:         $dispchangeA = $lt{'allposts'};
 1827:         $currdisp = $lt{'unread'};
 1828:         $discdisp = 'unread';
 1829:     }
 1830: 
 1831:     if ($markchg eq 'markonread') {
 1832:         $markchange = $lt{'onmark'};
 1833:         $currmark = $lt{'ondisp'};
 1834:         $discmark = 'ondisp';
 1835:     }
 1836: 
 1837:     if ($dispchgB eq 'onlyunread') {
 1838:         $dispchangeB = $lt{'unread'};
 1839:         $currdisp = $lt{'unmark'};
 1840:         $discdisp = 'unmark';
 1841:     }
 1842:     if ($toggchg eq 'toggoff') {
 1843:         $toggchange = $lt{'toggoff'};
 1844:         $currtogg = $lt{'toggon'};
 1845:         $disctogg = 'toggon';
 1846:     }
 1847: 
 1848:     my $js = <<END;
 1849: <script type="text/javascript">
 1850: function discdispChk(caller) {
 1851:     var disctogg = '$toggchg'
 1852:     if (caller == 0) {
 1853:         if (document.modifydisp.discdisp[0].checked == true) {
 1854:             if (document.modifydisp.discdisp[1].checked == true) {
 1855:                 document.modifydisp.discdisp[1].checked = false
 1856:             }
 1857:         }
 1858:     }
 1859:     if (caller == 1) {
 1860:         if (document.modifydisp.discdisp[1].checked == true) {
 1861:             if (document.modifydisp.discdisp[0].checked == true) {
 1862:                 document.modifydisp.discdisp[0].checked = false
 1863:             }
 1864:             if (disctogg == 'toggon') {
 1865:                 document.modifydisp.disctogg.checked = true
 1866:             }
 1867:             if (disctogg == 'toggoff') {
 1868:                 document.modifydisp.disctogg.checked = false
 1869:             }
 1870:         }
 1871:     }
 1872:     if (caller == 2) {
 1873:         var dispchgB = '$dispchgB'
 1874:         if (disctogg == 'toggoff') {
 1875:             if (document.modifydisp.disctogg.checked == true) {
 1876:                 if (dispchgB == 'onlyunmark') {
 1877:                     document.modifydisp.discdisp[1].checked = false
 1878:                 }
 1879:             }
 1880:         }
 1881:     }  
 1882: }
 1883: 
 1884: function setDisp() {
 1885:     var prev = "$previous"
 1886:     var chktotal = 0
 1887:     if (document.modifydisp.discdisp[0].checked == true) {
 1888:         document.modifydisp.$dispchgA.value = "$symb"
 1889:         chktotal ++
 1890:     }
 1891:     if (document.modifydisp.discdisp[1].checked == true) {
 1892:         document.modifydisp.$dispchgB.value = "$symb"
 1893:         chktotal ++
 1894:     }
 1895:     if (document.modifydisp.discmark.checked == true) {
 1896:         document.modifydisp.$markchg.value = "$symb"
 1897:         chktotal ++
 1898:     }
 1899:     if (document.modifydisp.disctogg.checked == true) {
 1900:         document.modifydisp.$toggchg.value = "$symb"
 1901:         chktotal ++
 1902:     }
 1903:     if (chktotal > 0) { 
 1904:         document.modifydisp.submit()
 1905:     } else {
 1906:         if(confirm("$lt{'yhni'}. \\n$lt{'ywbr'}"))      {
 1907:             if (prev > 0) {
 1908:                 location.href = "$feedurl?previous=$previous"
 1909:             } else {
 1910:                 location.href = "$feedurl"
 1911:             }
 1912:         }
 1913:     }
 1914: }
 1915: </script>
 1916: END
 1917: 
 1918: 
 1919:     my $start_page =
 1920: 	&Apache::loncommon::start_page('Discussion display options',$js);
 1921:     my $end_page =
 1922: 	&Apache::loncommon::end_page();
 1923:     $r->print(<<END);
 1924: $start_page
 1925: <form name="modifydisp" method="POST" action="/adm/feedback">
 1926: $lt{'sdpf'}<br/> $lt{'prca'}  <ol><li>$lt{'whpo'}</li><li>$lt{'unwh'}</li><li>$lt{'wipa'}</li></ol>
 1927: <br />
 1928: END
 1929:     $r->print(&Apache::loncommon::start_data_table());
 1930:     $r->print(<<END);
 1931:        <tr>
 1932:         <th>$lt{'pref'}</td>
 1933:         <th>$lt{'curr'}</td>
 1934:         <th>$lt{'actn'}?</td>
 1935:        </tr>
 1936: END
 1937:     $r->print(&Apache::loncommon::start_data_table_row());
 1938:     $r->print(<<END);
 1939:        <td>$lt{'disa'}</td>
 1940:        <td>$lt{$discdisp}</td>
 1941:        <td><label><input type="checkbox" name="discdisp" onClick="discdispChk('0')" />&nbsp;$lt{'chgt'} "$dispchangeA"</label>
 1942:            <br />
 1943:            <label><input type="checkbox" name="discdisp" onClick="discdispChk('1')" />&nbsp;$lt{'chgt'} "$dispchangeB"</label>
 1944:        </td>
 1945: END
 1946:     $r->print(&Apache::loncommon::end_data_table_row());
 1947:     $r->print(&Apache::loncommon::start_data_table_row());
 1948:     $r->print(<<END);
 1949:        <td>$lt{'npmr'}</td>
 1950:        <td>$lt{$discmark}</td>
 1951:        <td><label><input type="checkbox" name="discmark" />$lt{'chgt'} "$markchange"</label></td>
 1952: END
 1953:     $r->print(&Apache::loncommon::end_data_table_row());
 1954:     $r->print(&Apache::loncommon::start_data_table_row());
 1955:     $r->print(<<END);
 1956:        <td>$lt{'dotm'}</td>
 1957:        <td>$lt{$disctogg}</td>
 1958:        <td><label><input type="checkbox" name="disctogg" onClick="discdispChk('2')" />$lt{'chgt'} "$toggchange"</label></td>
 1959: END
 1960:     $r->print(&Apache::loncommon::end_data_table_row());
 1961:     $r->print(&Apache::loncommon::end_data_table());
 1962:     $r->print(<<END);
 1963: <br />
 1964: <br />
 1965: <input type="hidden" name="symb" value="$symb" />
 1966: <input type="hidden" name="previous" value="$previous" />
 1967: <input type="hidden" name="$dispchgA" value=""/>
 1968: <input type="hidden" name="$dispchgB" value=""/>
 1969: <input type="hidden" name="$markchg" value=""/>
 1970: <input type="hidden" name="$toggchg" value="" />
 1971: <input type="button" name="sub" value="Store Changes" onClick="javascript:setDisp()" />
 1972: END
 1973:     if (exists($env{'form.group'})) {
 1974:         $r->print('<input type="hidden" name="group" value="'.$env{'form.group'}.'" />');
 1975:     }
 1976:     if (exists($env{'form.ref'})) {
 1977:         $r->print('<input type="hidden" name="ref" value="'.$env{'form.ref'}.'" />');
 1978:     }
 1979:     $r->print("
 1980: <br />
 1981: <br />
 1982: </form>
 1983: $end_page
 1984:     ");
 1985:     return;
 1986: }
 1987: 
 1988: sub print_sortfilter_options {
 1989:     my ($r,$symb,$previous,$feedurl) = @_;
 1990: 
 1991:     &Apache::loncommon::content_type($r,'text/html');
 1992:     $r->send_http_header;
 1993: 
 1994:     &Apache::lonenc::check_encrypt(\$symb);
 1995:     my @sections;
 1996:     my $section_sel = '';
 1997:     my $numvisible = 5;
 1998:     my @groups;
 1999:     my $group_sel = '';
 2000:     my $numgroupvis = 5;
 2001:     my %sectioncount = &Apache::loncommon::get_sections();
 2002: 
 2003:     if ($env{'request.course.sec'} !~ /^\s*$/) {  #Restrict section choice to current section 
 2004:         @sections = ('all',$env{'request.course.sec'});
 2005:         $numvisible = 2;
 2006:     } else {
 2007:         @sections = sort {$a cmp $b} keys(%sectioncount);
 2008:         if (scalar(@sections) < 4) {
 2009:             $numvisible = scalar(@sections) + 1;
 2010:         }
 2011:         unshift(@sections,'all'); # Put 'all' at the front of the list
 2012: 
 2013:     }
 2014:     foreach my $sec (@sections) {
 2015:         $section_sel .= "  <option value=\"$sec\">$sec</option>\n";
 2016:     }
 2017: 
 2018:     if (&check_group_priv() eq 'ok') {
 2019:         my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
 2020:         my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; 
 2021:         my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum);
 2022:         @groups = sort {$a cmp $b} keys(%curr_groups);
 2023:         if (scalar(@groups) < 4) {
 2024:             $numgroupvis = scalar(@groups) + 1;
 2025:         }
 2026:         unshift(@groups,'all'); # Put 'all' at the front of the list
 2027:     } else { 
 2028:         my @coursegroups = split(/:/,$env{'request.course.groups'});
 2029:         if (@coursegroups > 0) {
 2030:             @coursegroups = sort {$a cmp $b} @coursegroups;
 2031:             @groups = ('all',@coursegroups);
 2032:             if (scalar(@groups) < 4) {
 2033:                 $numgroupvis = scalar(@groups) + 1;
 2034:             }
 2035:         } else {
 2036:             @groups = ('all');
 2037:             $numgroupvis = 1;
 2038:         }
 2039:     }
 2040:     foreach my $group (@groups) {
 2041:         $group_sel .= "  <option value=\"$group\">$group</option>\n";
 2042:     }
 2043: 
 2044:     my $function = &Apache::loncommon::get_users_function();
 2045:     my $tabcolor = &Apache::loncommon::designparm($function.'.tabbg',
 2046:                                                     $env{'user.domain'});
 2047:     my %lt = &Apache::lonlocal::texthash(
 2048:         'diop' => 'Display Options',
 2049:         'curr' => 'Current setting ',
 2050:         'actn' => 'Action',
 2051:         'prca' => 'Set options that control the sort order of posts, and/or which posts are displayed.',
 2052:         'soor' => 'Sort order',
 2053:         'spur' => 'Specific user roles',
 2054:         'sprs' => 'Specific role status',
 2055:         'spse' => 'Specific sections',
 2056:         'spgr' => 'Specific groups',
 2057:         'psub' => 'Pick specific users (by name)',
 2058:         'shal' => 'Show a list of current posters',
 2059:         'stor' => 'Store changes',
 2060:     );
 2061: 
 2062:     my %sort_types = ();
 2063:     my %role_types = ();
 2064:     my %status_types = ();
 2065:     &sort_filter_names(\%sort_types,\%role_types,\%status_types);
 2066: 
 2067:     my $js = <<END;
 2068: <script type="text/javascript">
 2069: function verifyFilter() {
 2070:     var rolenum = 0
 2071:     for (var i=0; i<document.modifyshown.rolefilter.length; i++) {
 2072:         if (document.modifyshown.rolefilter.options[i].selected == true) {
 2073:             rolenum ++
 2074:         }
 2075:     }
 2076:     if (rolenum == 0) {
 2077:         document.modifyshown.rolefilter.options[0].selected = true
 2078:     }
 2079: 
 2080:     var secnum = 0
 2081:     for (var i=0; i<document.modifyshown.sectionpick.length; i++) {
 2082:         if (document.modifyshown.sectionpick.options[i].selected == true) {
 2083:             secnum ++
 2084:         }
 2085:     }
 2086:     if (secnum == 0) {
 2087:         document.modifyshown.sectionpick.options[0].selected = true
 2088:     }
 2089: 
 2090:     var grpnum = 0
 2091:     for (var i=0; i<document.modifyshown.grouppick.length; i++) {
 2092:         if (document.modifyshown.grouppick.options[i].selected == true) {
 2093:             grpnum ++
 2094:         }
 2095:     }
 2096:     if (grpnum == 0) {
 2097:         document.modifyshown.grouppick.options[0].selected = true
 2098:     }
 2099: 
 2100:     document.modifyshown.submit();
 2101: }
 2102: </script>
 2103: END
 2104: 
 2105:     my $start_page=
 2106: 	&Apache::loncommon::start_page('Discussion options',$js);
 2107:     my $end_page=
 2108: 	&Apache::loncommon::end_page();
 2109: 
 2110:     $r->print(<<END);
 2111: $start_page
 2112: <form name="modifyshown" method="POST" action="/adm/feedback">
 2113: <b>$lt{'diso'}</b><br/> $lt{'prca'}
 2114: <br /><br />
 2115: <table border="0">
 2116:  <tr>
 2117:   <td><b>$lt{'soor'}</b></td>
 2118:   <td>&nbsp;</td>
 2119:   <td><b>$lt{'sprs'}</b></td>
 2120:   <td>&nbsp;</td>
 2121:   <td><b>$lt{'spur'}</b></td>
 2122:   <td>&nbsp;</td>
 2123:   <td><b>$lt{'spse'}</b></td>
 2124:   <td>&nbsp;</td>
 2125:   <td><b>$lt{'spgr'}</b></td>
 2126:   <td>&nbsp;</td>
 2127:   <td><b>$lt{'psub'}</b></td>
 2128:  </tr>
 2129:  <tr>
 2130:   <td align="center" valign="top">
 2131:    <select name="sortposts">
 2132:     <option value="ascdate" selected="selected">$sort_types{'ascdate'}</option>
 2133:     <option value="descdate">$sort_types{'descdate'}</option>
 2134:     <option value="thread">$sort_types{'thread'}</option>
 2135:     <option value="subject">$sort_types{'subject'}</option>
 2136:     <option value="username">$sort_types{'username'}</option>
 2137:     <option value="lastfirst">$sort_types{'lastfirst'}</option>
 2138:    </select>
 2139:   </td>
 2140:   <td>&nbsp;</td>
 2141:   <td align="center" valign="top">
 2142:    <select name="statusfilter">
 2143:     <option value="all" selected="selected">$status_types{'all'}</option>
 2144:     <option value="Active">$status_types{'Active'}</option>
 2145:     <option value="Expired">$status_types{'Expired'}</option>
 2146:     <option value="Future">$status_types{'Future'}</option>
 2147:    </select>
 2148:   </td>
 2149:   <td>&nbsp;</td>
 2150:   <td align="center" valign="top">
 2151:    <select name="rolefilter" multiple="true" size="5">
 2152:     <option value="all">$role_types{'all'}</option>
 2153:     <option value="st">$role_types{'st'}</option>
 2154:     <option value="cc">$role_types{'cc'}</option>
 2155:     <option value="in">$role_types{'in'}</option>
 2156:     <option value="ta">$role_types{'ta'}</option>
 2157:     <option value="ep">$role_types{'ep'}</option>
 2158:     <option value="cr">$role_types{'cr'}</option>
 2159:    </select>
 2160:   </td>
 2161:   <td>&nbsp;</td>
 2162:   <td align="center" valign="top">
 2163:    <select name="sectionpick" multiple="true" size="$numvisible">
 2164:     $section_sel
 2165:    </select>
 2166:   </td>
 2167:   <td>&nbsp;</td>
 2168:   <td align="center" valign="top">
 2169:    <select name="grouppick" multiple="true" size="$numvisible">
 2170:     $group_sel
 2171:    </select>
 2172:   </td>
 2173:   <td>&nbsp;</td>
 2174:   <td valign="top"><label><input type="checkbox" name="posterlist" value="$symb" />$lt{'shal'}</label></td>
 2175:  </tr>
 2176: </table>
 2177: <br />
 2178: <br />
 2179: <input type="hidden" name="previous" value="$previous" />
 2180: <input type="hidden" name="applysort" value="$symb" />
 2181: <input type="button" name="sub" value="$lt{'stor'}" onClick="verifyFilter()" />
 2182: END
 2183:     if (exists($env{'form.group'})) {
 2184:         $r->print('<input type="hidden" name="group" value="'.$env{'form.group'}.'" />');
 2185:     }
 2186:     if (exists($env{'form.ref'})) {
 2187:         $r->print('<input type="hidden" name="ref" value="'.$env{'form.ref'}.'" />');
 2188:     }
 2189:     $r->print("
 2190: <br />
 2191: <br />
 2192: </form>
 2193: $end_page
 2194: ");
 2195: }
 2196: 
 2197: sub print_showposters {
 2198:     my ($r,$symb,$previous,$feedurl,$sortposts) = @_;
 2199: 
 2200:     &Apache::loncommon::content_type($r,'text/html');
 2201:     $r->send_http_header;
 2202: 
 2203:     &Apache::lonenc::check_encrypt(\$symb);
 2204:     my $crs='/'.$env{'request.course.id'};
 2205:     if ($env{'request.course.sec'}) {
 2206:         $crs.='_'.$env{'request.course.sec'};
 2207:     }
 2208:     $crs=~s/\_/\//g;
 2209:     my $seeid;
 2210:     my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
 2211:     my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
 2212:     my $group = $env{'form.group'};
 2213:     my $ressymb = &wrap_symb($symb);
 2214:     if (($group ne '') &&
 2215:         ($ressymb =~ m|^bulletin___ \d+___adm/wrapper/adm/\Q$cdom\E/\Q$cnum\E/\d+/bulletinboard$|)) {
 2216:         if (&check_group_priv($group,'dgp') eq 'ok') {
 2217:             $seeid = 1;
 2218:         }
 2219:     } else {
 2220:         $seeid=&Apache::lonnet::allowed('rin',$crs);
 2221:     }
 2222:     my %contrib=&Apache::lonnet::restore($symb,$env{'request.course.id'},
 2223:                                          $cdom,$cnum);
 2224:     my %namesort = ();
 2225:     my %postcounts = ();
 2226: 
 2227:     my %lt = &Apache::lonlocal::texthash(
 2228:                                           sele => 'Select',
 2229:                                           full => 'Fullname',
 2230:                                           usdo => 'Username:domain',
 2231:                                           post => 'Posts',
 2232:                                         );
 2233:     if ($contrib{'version'}) {
 2234:         for (my $idx=1;$idx<=$contrib{'version'};$idx++) {
 2235:             my $hidden=($contrib{'hidden'}=~/\.$idx\./);
 2236:             my $deleted=($contrib{'deleted'}=~/\.$idx\./);
 2237:             unless ((($hidden) && (!$seeid)) || ($deleted)) {
 2238:                 if ((!$contrib{$idx.':anonymous'}) || (&Apache::lonnet::allowed('rin',$env{'request.course.id'}.($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:'')))) {
 2239:                     my %names = &Apache::lonnet::get('environment',['firstname','lastname'],$contrib{$idx.':senderdomain'},$contrib{$idx.':sendername'});
 2240:                     my $lastname = $names{'lastname'};
 2241:                     my $firstname = $names{'firstname'};
 2242:                     if ($lastname eq '') {
 2243:                         $lastname = '_';
 2244:                     }
 2245:                     if ($firstname eq '') {
 2246:                         $firstname = '_';
 2247:                     }
 2248:                     unless (defined($namesort{$lastname})) {
 2249:                         %{$namesort{$lastname}} = ();
 2250:                     }
 2251:                     my $poster =  $contrib{$idx.':sendername'}.':'.$contrib{$idx.':senderdomain'};
 2252:                     $postcounts{$poster} ++;
 2253:                     if (defined($namesort{$lastname}{$firstname})) {
 2254:                         if (!grep/^$poster$/,@{$namesort{$lastname}{$firstname}}) {
 2255:                             push(@{$namesort{$lastname}{$firstname}}, $poster);
 2256:                         }
 2257:                     } else {
 2258:                         @{$namesort{$lastname}{$firstname}} = ("$poster");
 2259:                     }
 2260:                 }
 2261:             }
 2262:         }
 2263:     }
 2264: 
 2265:     my $start_page = &Apache::loncommon::start_page('Discussion options');
 2266:     my $table_start =&Apache::loncommon::start_data_table();
 2267:     $r->print(<<END);
 2268: $start_page
 2269:  <form name="pickpostersform" method="post">
 2270:  <br />
 2271:     $table_start
 2272:       <tr>
 2273:        <th>#</th>
 2274:        <th>$lt{'sele'}</th>
 2275:        <th>$lt{'full'} <font color="#999999">($lt{'usdo'})</font></th>
 2276:        <th>$lt{'post'}</th>
 2277:       </tr>
 2278: END
 2279:     my $count = 0;
 2280:     foreach my $last (sort(keys(%namesort))) {
 2281:         foreach my $first (sort(keys(%{$namesort{$last}}))) {
 2282:             foreach my $user (sort(@{$namesort{$last}{$first}})) {
 2283:                 my ($uname,$udom) = split(/:/,$user);
 2284:                 if (!$uname || !$udom) { 
 2285:                     next;
 2286:                 } else {
 2287:                     $count ++;
 2288:                     $r->print(&Apache::loncommon::start_data_table_row().
 2289: 			      '<td align="right">'.$count.'</td>
 2290:                                <td align="center"><label><input name="stuinfo" type="checkbox" value="'.$user.'" /></td>
 2291:                                <td>'.$last.', '.$first.' ('.$uname.':'.$udom.')</label></td>
 2292:                                <td>'.$postcounts{$user}.'</td>'.
 2293: 			      &Apache::loncommon::end_data_table_row());
 2294:                 }
 2295:             }
 2296:         }
 2297:     }
 2298:     $r->print(&Apache::loncommon::end_data_table());
 2299:     my $end_page   = &Apache::loncommon::end_page();
 2300:     $r->print(<<END);
 2301: <br />
 2302: <input type="hidden" name="sortposts" value="$sortposts" />
 2303: <input type="hidden" name="userpick" value="$symb" />
 2304: <input type="button" name="store" value="Display posts" onClick="javascript:document.pickpostersform.submit()" />
 2305: </form>
 2306: $end_page
 2307: END
 2308: }
 2309: 
 2310: sub get_post_versions {
 2311:     my ($versions,$incoming,$htmldecode,$numver) = @_;
 2312:     if ($incoming =~ /^<version num="0">/) {
 2313:         my $p = HTML::LCParser->new(\$incoming);
 2314:         my $done = 0; 
 2315: 
 2316:         while ( (my $token = $p->get_tag("version")) && (!$done)) {
 2317:             my $num = $token->[1]{num};
 2318:             my $text = $p->get_text("/version");
 2319:             if (defined($numver)) {
 2320:                 if ($num == $numver) {
 2321:                     if ($htmldecode) {
 2322:                         $text = &HTML::Entities::decode($text);
 2323:                     }
 2324:                     $$versions{$numver}=$text;
 2325:                     $done = 1;
 2326:                 }
 2327:             } else {
 2328:                 if ($htmldecode) {
 2329:                     $text = &HTML::Entities::decode($text);
 2330:                 }
 2331:                 $$versions{$num}=$text;
 2332:             }
 2333:         }
 2334:     } else {
 2335:         if (!defined($numver)) {
 2336:             $numver = 0;
 2337:         }
 2338:         if ($htmldecode) {
 2339:             $$versions{$numver} = $incoming;
 2340:         } else {
 2341:             $$versions{$numver} = &HTML::Entities::encode($incoming,'<>&"');
 2342:         }
 2343:     }
 2344:     return;
 2345: }
 2346: 
 2347: sub get_post_attachments {
 2348:     my ($attachments,$attachmenturls) = @_;
 2349:     my $num;
 2350:     if ($attachmenturls =~ m/^<attachment id="0">/) {
 2351:         my $p = HTML::LCParser->new(\$attachmenturls);
 2352:         while (my $token = $p->get_tag("attachment","filename","post"))  {
 2353:             if ($token->[0] eq "attachment") {
 2354:                 $num = $token->[1]{id};
 2355:                 %{$$attachments{$num}} =();
 2356:             } elsif ($token->[0] eq "filename") {
 2357:                 $$attachments{$num}{'filename'} = $p->get_text("/filename");
 2358:             } elsif ($token->[0] eq "post") {
 2359:                 my $id = $token->[1]{id};
 2360:                 $$attachments{$num}{$id} = $p->get_text("/post");
 2361:             }
 2362:         }
 2363:     } else {
 2364:         %{$$attachments{'0'}} = ();
 2365:         $$attachments{'0'}{'filename'} = $attachmenturls;
 2366:         $$attachments{'0'}{'0'} = 'n';
 2367:     }
 2368: 
 2369:     return;
 2370: }
 2371: 
 2372: sub fail_redirect {
 2373:   my ($r,$feedurl) = @_;
 2374:   if ($feedurl=~/^\/adm\//) { $feedurl.='?register=1' };
 2375:   my %lt = &Apache::lonlocal::texthash(
 2376:                  'sorr' => 'Sorry, no recipients  ...',
 2377:   );
 2378:   my $logo=&Apache::loncommon::lonhttpdurl('/adm/lonIcons/lonlogos.gif');
 2379:   $r->print(&Apache::loncommon::start_page('Feedback not sent',undef,
 2380: 					   {'redirect'  => [2,$feedurl],
 2381: 					    'only_body' => 1,}));
 2382:   $r->print(<<ENDFAILREDIR);
 2383: <img align="right" src="$logo" />
 2384: <b>$lt{'sorr'}</b>
 2385: ENDFAILREDIR
 2386:   $r->print(&Apache::loncommon::end_page());
 2387: }
 2388: 
 2389: sub redirect_back {
 2390:   my ($r,$feedurl,$typestyle,$sendsomething,$sendposts,$blog,$status,$previous,$sort,$rolefilter,$statusfilter,$sectionpick,$grouppick,$numpicks,$group) = @_;
 2391:   my $sorttag = '';
 2392:   my $roletag = '';
 2393:   my $statustag = '';
 2394:   my $sectag = '';
 2395:   my $grptag = '';
 2396:   my $userpicktag = '';
 2397:   my $qrystr = '';
 2398:   my $prevtag = '';
 2399: 
 2400:   &Apache::loncommon::content_type($r,'text/html');
 2401:   $r->send_http_header;
 2402:   &dewrapper(\$feedurl);
 2403:   if ($feedurl=~/^\/adm\//) { $feedurl.='?register=1' };
 2404:   if ($previous > 0) {
 2405:       $qrystr = 'previous='.$previous;
 2406:       if ($feedurl =~ /\?register=1/) {
 2407:           $feedurl .= '&'.$qrystr;
 2408:       } else {
 2409:           $feedurl .= '?'.$qrystr;
 2410:       }
 2411:       $prevtag = '<input type="hidden" name="previous" value="'.$previous.'" />';
 2412:   }
 2413:   if (defined($sort)) {
 2414:       my $sortqry = 'sortposts='.$sort;
 2415:       if (($feedurl =~ /\?register=1/) || ($feedurl =~ /\?previous=/)) {
 2416:           $feedurl .= '&'.$sortqry;
 2417:       } else {
 2418:           $feedurl .= '?'.$sortqry;
 2419:       }
 2420:       $sorttag = '<input type="hidden" name="sortposts" value="'.$sort.'" />';
 2421:       if (defined($numpicks)) {
 2422:           my $userpickqry = 'totposters='.$numpicks;
 2423:           $feedurl .= '&'.$userpickqry;
 2424:           $userpicktag = '<input type="hidden" name="totposters" value="'.$numpicks.'" />';
 2425:       } else {
 2426:           if (ref($sectionpick) eq 'ARRAY') {
 2427:               $feedurl .= '&sectionpick=';
 2428:               $sectag .=  '<input type="hidden" name="sectionpick" value="';
 2429:               foreach my $sec (@{$sectionpick}) {
 2430:                   $feedurl .= $sec.',';
 2431:                   $sectag .= $sec.',';
 2432:               }
 2433:               $feedurl =~ s/,$//;
 2434:               $sectag =~ s/,$//;
 2435:               $sectag .= '" />';
 2436:           } else {
 2437:               $feedurl .= '&sectionpick='.$sectionpick;
 2438:               $sectag = '<input type="hidden" name="sectionpick" value="'.$sectionpick.'" />';
 2439:           }
 2440:           if (ref($grouppick) eq 'ARRAY') {
 2441:               $feedurl .= '&grouppick=';
 2442:               $sectag .=  '<input type="hidden" name="grouppick" value="';
 2443:               foreach my $grp (@{$grouppick}) {
 2444:                   $feedurl .= $grp.',';
 2445:                   $grptag .= $grp.',';
 2446:               }
 2447:               $feedurl =~ s/,$//;
 2448:               $grptag =~ s/,$//;
 2449:               $grptag .= '" />';
 2450:           } else {
 2451:               $feedurl .= '&grouppick='.$grouppick;
 2452:               $grptag = '<input type="hidden" name="grouppick" value="'.$grouppick.'" />';
 2453:           }
 2454:           if (ref($rolefilter) eq 'ARRAY') {
 2455:               $feedurl .= '&rolefilter=';
 2456:               $roletag .=  '<input type="hidden" name="rolefilter" value="';
 2457:               foreach my $role (@{$rolefilter}) {
 2458:                   $feedurl .= $role.',';
 2459:                   $roletag .= $role.',';
 2460:               }
 2461:               $feedurl =~ s/,$//;
 2462:               $roletag =~ s/,$//;
 2463:               $roletag .= '" />';
 2464:           } else {
 2465:               $feedurl .= '&rolefilter='.$rolefilter;
 2466:               $roletag = '<input type="hidden" name="rolefilter" value="'.$rolefilter.'" />';
 2467:           }
 2468:           $feedurl .= '&statusfilter='.$statusfilter;
 2469:           $statustag ='<input type="hidden" name="statusfilter" value="'.$statusfilter.'" />';
 2470:       }
 2471:   }
 2472:   my $grouptag;
 2473:   if ($group ne '') {
 2474:       $grouptag = '<input type="hidden" name="group" value="'.$group.'" />';      my $refarg;
 2475:       if (exists($env{'form.ref'})) {
 2476:           $refarg = '&amp;ref='.$env{'form.ref'};
 2477:           $grouptag .= '<input type="hidden" name="ref" value="'.$env{'form.ref'}.'" />';
 2478:       }
 2479:       if ($feedurl =~ /\?/) {
 2480:           $feedurl .= '&amp;group='.$group.$refarg;
 2481:       } else {
 2482:           $feedurl .= '?group='.$group.$refarg;
 2483:       }
 2484:   } 
 2485:   &Apache::lonenc::check_encrypt(\$feedurl);
 2486:   my $logo=&Apache::loncommon::lonhttpdurl('/adm/lonIcons/lonlogos.gif');
 2487:   my %onload;
 2488:   if ($env{'environment.remote'} ne 'off') {
 2489:       $onload{'onload'} =
 2490: 	  "if (window.name!='loncapaclient') { this.document.reldt.submit(); self.window.close(); }";
 2491:   }
 2492:   my $start_page=
 2493:       &Apache::loncommon::start_page('Feedback sent',undef,
 2494: 				     {'redirect'    => [0,$feedurl],
 2495: 				      'only_body'   => 1,
 2496: 				      'add_entries' => \%onload});
 2497:   my $end_page = &Apache::loncommon::end_page();
 2498:   $r->print(<<ENDREDIR);
 2499: $start_page
 2500: <img align="right" src="$logo" />
 2501: $typestyle
 2502: <b>Sent $sendsomething message(s), and $sendposts post(s).</b>
 2503: $blog
 2504: <font color="red">$status</font>
 2505: <form name="reldt" action="$feedurl" target="loncapaclient">
 2506: $prevtag
 2507: $sorttag
 2508: $statustag
 2509: $roletag
 2510: $sectag
 2511: $grptag
 2512: $userpicktag
 2513: $grouptag
 2514: </form>
 2515: $end_page
 2516: ENDREDIR
 2517: }
 2518: 
 2519: sub no_redirect_back {
 2520:   my ($r,$feedurl) = @_;
 2521:   my $nofeed=&mt('Sorry, no feedback possible on this resource  ...');
 2522:  
 2523:   my %onload;
 2524:   if ($env{'environment.remote'} ne 'off') {
 2525:       $onload{'onload'} = 
 2526: 	  "if (window.name!='loncapaclient') { self.window.close(); }";
 2527:   }
 2528: 
 2529:   my %body_options = ('only_body'   => 1,
 2530: 		      'bgcolor'     => '#FFFFFF',
 2531: 		      'add_entries' => \%onload,);
 2532: 
 2533:   if ($feedurl !~ m{^/adm/feedback}) { 
 2534:       $body_options{'rediect'} = [2,$feedurl];
 2535:   }
 2536:   my $start_page=
 2537:       &Apache::loncommon::start_page('Feedback not sent',undef,
 2538: 				     \%body_options);
 2539: 				      
 2540:   my $end_page = &Apache::loncommon::end_page();
 2541: 
 2542:   &Apache::lonenc::check_encrypt(\$feedurl);
 2543:   my $logo=&Apache::loncommon::lonhttpdurl('/adm/lonIcons/lonlogos.gif');
 2544:   $r->print (<<ENDNOREDIRTWO);
 2545: $start_page
 2546: <img align="right" src="$logo" />
 2547: <b>$nofeed</b>
 2548: <br />
 2549: $end_page
 2550: ENDNOREDIRTWO
 2551: }
 2552: 
 2553: sub screen_header {
 2554:     my ($feedurl,$symb) = @_;
 2555:     my $msgoptions='';
 2556:     my $discussoptions='';
 2557:     unless (($env{'form.replydisc'}) || ($env{'form.editdisc'})) {
 2558: 	if (($feedurl=~/^\/res\//) && ($feedurl!~/^\/res\/adm/) && ($env{'user.adv'})) {
 2559: 	    $msgoptions= 
 2560: 		'<p><label><input type="radio" name="discuss" value="author" /> '.
 2561: 		&mt('Feedback to resource author').'</label></p>';
 2562: 	}
 2563: 	if (&feedback_available(1)) {
 2564: 	    $msgoptions.=
 2565: 		'<p><label><input type="radio" name="discuss" value="question" /> '.
 2566: 		&mt('Question about resource content').'</label></p>';
 2567: 	}
 2568: 	if (&feedback_available(0,1)) {
 2569: 	    $msgoptions.=
 2570: 		'<p><label><input type="radio" name="discuss" value="course" /> '.
 2571: 		&mt('Question/Comment/Feedback about course content').
 2572: 		'</label></p>';
 2573: 	}
 2574: 	if (&feedback_available(0,0,1)) {
 2575: 	    $msgoptions.=
 2576: 		'<p><label><input type="radio" name="discuss" value="policy" /> '.
 2577: 		&mt('Question/Comment/Feedback about course policy').
 2578: 		'</label></p>';
 2579: 	}
 2580:     }
 2581:     if (($env{'request.course.id'}) && (!$env{'form.sendmessageonly'})) {
 2582: 	if (&discussion_open(undef,$symb) &&
 2583: 	    &Apache::lonnet::allowed('pch',
 2584: 				     $env{'request.course.id'}.
 2585: 				     ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))) {
 2586: 	    $discussoptions='<label><input type="radio" name="discuss" value="nonanon" checked="checked" /> '.
 2587: 		&mt('Contribution to course discussion of resource');
 2588: 	        $discussoptions.='</label><br /><label><input type="radio" name="discuss" value="anon" /> '.
 2589: 		&mt('Anonymous contribution to course discussion of resource').
 2590: 		' <i>('.&mt('name only visible to course faculty').')</i></label> '.
 2591: 		'<a href="/adm/preferences?action=changescreenname">'.&mt('Change Screenname').'</a>';
 2592:         }
 2593:         my $blockblog = &Apache::loncommon::blocking_status('blogs');
 2594:         if (!$blockblog) {
 2595:             $discussoptions.= &add_blog_checkbox();
 2596:         }
 2597:     }
 2598:     if ($msgoptions) { $msgoptions='<h2><img src="'.&Apache::loncommon::lonhttpdurl('/adm/lonMisc/feedback.gif').'" />'.&mt('Sending Messages').'</h2>'.$msgoptions; }
 2599:     if ($discussoptions) { 
 2600: 	$discussoptions='<h2><img src="'.&Apache::loncommon::lonhttpdurl('/adm/lonMisc/chat.gif').'" />'.&mt('Discussion Contributions').'</h2>'.$discussoptions; }
 2601:     return $msgoptions.$discussoptions;
 2602: }
 2603: 
 2604: sub resource_output {
 2605:   my ($feedurl) = @_;
 2606:   my $usersaw=&Apache::lonnet::ssi_body($feedurl);
 2607:   $usersaw=~s/\<body[^\>]*\>//gi;
 2608:   $usersaw=~s/\<\/body\>//gi;
 2609:   $usersaw=~s/\<html\>//gi;
 2610:   $usersaw=~s/\<\/html\>//gi;
 2611:   $usersaw=~s/\<head\>//gi;
 2612:   $usersaw=~s/\<\/head\>//gi;
 2613:   $usersaw=~s/action\s*\=/would_be_action\=/gi;
 2614:   return $usersaw;
 2615: }
 2616: 
 2617: sub clear_out_html {
 2618:   my ($message,$override,$ignore_htmlarea)=@_;
 2619:   if (!$ignore_htmlarea
 2620:       && !&Apache::lonhtmlcommon::htmlareablocked()) { return $message; }
 2621: # Always allow the <m>-tag
 2622:   my %html=(M=>1);
 2623: # Check if more is allowed
 2624:   my $cid=$env{'request.course.id'};
 2625:   if (($env{"course.$cid.allow_limited_html_in_feedback"} =~ m/yes/i) ||
 2626:       ($override)) {
 2627:       # allows <B> <I> <P> <A> <LI> <OL> <UL> <EM> <BR> <TT> <STRONG> 
 2628:       # <BLOCKQUOTE> <DIV .*> <DIV> <IMG> <M> <SPAN> <H1> <H2> <H3> <H4> <SUB>
 2629:       # <SUP>
 2630:       %html=(B=>1, I=>1, P=>1, A=>1, LI=>1, OL=>1, UL=>1, EM=>1,
 2631: 	     BR=>1, TT=>1, STRONG=>1, BLOCKQUOTE=>1, DIV=>1, IMG=>1,
 2632: 	     M=>1, ALGEBRA=>1, SUB=>1, SUP=>1, SPAN=>1, 
 2633: 	     H1=>1, H2=>1, H3=>1, H4=>1, H5=>1);
 2634:   }
 2635: # Do the substitution of everything that is not explicitly allowed
 2636:   $message =~ s/\<(\/?\s*(\w+)[^\>\<]*)/
 2637: 	  {($html{uc($2)}&&(length($1)<1000))?"\<$1":"\&lt;$1"}/ge;
 2638:   $message =~ s/(\<?\s*(\w+)[^\<\>]*)\>/
 2639: 	  {($html{uc($2)}&&(length($1)<1000))?"$1\>":"$1\&gt;"}/ge;
 2640:   return $message;
 2641: }
 2642: 
 2643: sub assemble_email {
 2644:   my ($feedurl,$message,$prevattempts,$usersaw,$useranswer)=@_;
 2645:   my %lt = &Apache::lonlocal::texthash(
 2646:              'prev' => 'Previous attempts of student (if applicable)',
 2647:              'orig' => 'Original screen output (if applicable)',
 2648:              'corr' => 'Correct Answer(s) (if applicable)',
 2649:   );
 2650:   my $email=<<"ENDEMAIL";
 2651: $message
 2652: ENDEMAIL
 2653:     my $citations=<<"ENDCITE";
 2654: <h2>$lt{'prev'}</h2>
 2655: $prevattempts
 2656: <br /><hr />
 2657: <h2>$lt{'orig'}</h2>
 2658: $usersaw
 2659: <h2>$lt{'corr'}</h2>
 2660: $useranswer
 2661: ENDCITE
 2662:   return ($email,$citations);
 2663: }
 2664: 
 2665: sub secapply {
 2666:     my $rec=shift;
 2667:     my $defaultflag=shift;
 2668:     $rec=~s/\s+//g;
 2669:     $rec=~s/\@/\:/g;
 2670:     my ($adr,$sections_or_groups)=($rec=~/^([^\(]+)\(([^\)]+)\)/);
 2671:     if ($sections_or_groups) {
 2672: 	foreach my $item (split(/\;/,$sections_or_groups)) {
 2673:             if (($item eq $env{'request.course.sec'}) ||
 2674:                 ($defaultflag && ($item eq '*'))) {
 2675:                 return $adr; 
 2676:             } elsif ($env{'request.course.groups'}) {
 2677:                 my @usersgroups = split(/:/,$env{'request.course.groups'});
 2678:                 if (grep(/^\Q$item\E$/,@usersgroups)) {
 2679:                     return $adr;
 2680:                 }
 2681:             } 
 2682:         }
 2683:     } else {
 2684:        return $rec;
 2685:     }
 2686:     return '';
 2687: }
 2688: 
 2689: =pod 
 2690: 
 2691: =over 4
 2692: 
 2693: =item *
 2694: 
 2695: decide_receiver($feedurl,$author,$question,$course,$policy,$defaultflag);
 2696: 
 2697: Arguments
 2698:   $feedurl - /res/ url of resource (only need if $author is true)
 2699:   $author,$question,$course,$policy - all true/false parameters
 2700:     if true will attempt to find the addresses of user that should receive
 2701:     this type of feedback (author - feedback to author of resource $feedurl,
 2702:     $question 'Resource Content Questions', $course 'Course Content Question',
 2703:     $policy 'Course Policy')
 2704:     (Additionally it also checks $env for whether the corresponding form.<name>
 2705:     element exists, for ease of use in a html response context)
 2706:    
 2707:   $defaultflag - (internal should be left blank) if true gather addresses 
 2708:                  that aren't for a section even if I have a section
 2709:                  (used for reccursion internally, first we look for
 2710:                  addresses for our specific section then we recurse
 2711:                  and look for non section addresses)
 2712: 
 2713: Returns
 2714:   $typestyle - string of html text, describing what addresses were found
 2715:   %to - a hash, which keys are addresses of users to send messages to
 2716:         the keys will look like   name:domain
 2717: 
 2718: =cut
 2719: 
 2720: sub decide_receiver {
 2721:   my ($feedurl,$author,$question,$course,$policy,$defaultflag) = @_;
 2722:   my $typestyle='';
 2723:   my %to=();
 2724:   if ($env{'form.discuss'} eq 'author' ||$author) {
 2725:     $typestyle.='Submitting as Author Feedback<br />';
 2726:     $feedurl=~ m{^/res/($LONCAPA::domain_re)/($LONCAPA::username_re)/};
 2727:     $to{$2.':'.$1}=1;
 2728:   }
 2729:   if ($env{'form.discuss'} eq 'question' ||$question) {
 2730:     $typestyle.=&mt('Submitting as Question').'<br />';
 2731:     foreach my $item (split(/\,/,
 2732: 		   $env{'course.'.$env{'request.course.id'}.'.question.email'})
 2733: 	     ) {
 2734: 	my $rec=&secapply($item,$defaultflag);
 2735:         if ($rec) { $to{$rec}=1; }
 2736:     } 
 2737:   }
 2738:   if ($env{'form.discuss'} eq 'course' ||$course) {
 2739:     $typestyle.=&mt('Submitting as Comment').'<br />';
 2740:     foreach my $item (split(/\,/,
 2741: 		   $env{'course.'.$env{'request.course.id'}.'.comment.email'})
 2742: 	     ) {
 2743: 	my $rec=&secapply($item,$defaultflag);
 2744:         if ($rec) { $to{$rec}=1; }
 2745:     } 
 2746:   }
 2747:   if ($env{'form.discuss'} eq 'policy' ||$policy) {
 2748:     $typestyle.=&mt('Submitting as Policy Feedback').'<br />';
 2749:     foreach my $item (split(/\,/,
 2750: 		   $env{'course.'.$env{'request.course.id'}.'.policy.email'})
 2751: 	     ) {
 2752: 	my $rec=&secapply($item,$defaultflag);
 2753:         if ($rec) { $to{$rec}=1; }
 2754:     } 
 2755:   }
 2756:   if ((scalar(%to) eq '0') && (!$defaultflag)) {
 2757:      ($typestyle,%to)=
 2758: 	 &decide_receiver($feedurl,$author,$question,$course,$policy,1);
 2759:   }
 2760:   return ($typestyle,%to);
 2761: }
 2762: 
 2763: sub feedback_available {
 2764:     my ($question,$course,$policy)=@_;
 2765:     my ($typestyle,%to)=&decide_receiver('',0,$question,$course,$policy);
 2766:     return scalar(%to);
 2767: }
 2768: 
 2769: sub send_msg {
 2770:   my ($title,$feedurl,$email,$citations,$attachmenturl,%to)=@_;
 2771:   my $status='';
 2772:   my $sendsomething=0;
 2773:   if ($title=~/^Error/) { $title=&mt('Feedback').': '.$title; }
 2774:   unless ($title=~/\w/) { $title=&mt('Feedback'); }
 2775:   foreach my $key (keys(%to)) {
 2776:     if ($key) {
 2777:       my $declutter=&Apache::lonnet::declutter($feedurl);
 2778:       unless (&Apache::lonmsg::user_normal_msg(split(/\:/,$key),
 2779:                $title.' ['.$declutter.']',$email,$citations,$feedurl,
 2780:                 $attachmenturl)=~/ok/) {
 2781: 	$status.='<br />'.&mt('Error sending message to').' '.$key.'<br />';
 2782:       } else {
 2783: 	$sendsomething++;
 2784:       }
 2785:     }
 2786:   }
 2787: 
 2788:     my %record=&Apache::lonnet::restore('_feedback');
 2789:     my ($temp)=keys(%record);
 2790:     unless ($temp=~/^error\:/) {
 2791:        my %newrecord=();
 2792:        $newrecord{'resource'}=$feedurl;
 2793:        $newrecord{'subnumber'}=$record{'subnumber'}+1;
 2794:        unless (&Apache::lonnet::cstore(\%newrecord,'_feedback') eq 'ok') {
 2795: 	   $status.='<br />'.&mt('Not registered').'<br />';
 2796:        }
 2797:     }
 2798:        
 2799:   return ($status,$sendsomething);
 2800: }
 2801: 
 2802: sub adddiscuss {
 2803:     my ($symb,$email,$anon,$attachmenturl,$subject)=@_;
 2804:     my $status='';
 2805:     my $realsymb;
 2806:     if ($symb=~/^bulletin___/) {
 2807: 	my $filename=(&Apache::lonnet::decode_symb($symb))[2];
 2808: 	$filename=~s|^adm/wrapper/||;
 2809: 	$realsymb=&Apache::lonnet::symbread($filename);
 2810:     }
 2811:     if (&discussion_open(undef,$realsymb) &&
 2812: 	&Apache::lonnet::allowed('pch',$env{'request.course.id'}.
 2813:         ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))) {
 2814: 
 2815:     my %contrib=('message'      => $email,
 2816:                  'sendername'   => $env{'user.name'},
 2817:                  'senderdomain' => $env{'user.domain'},
 2818:                  'screenname'   => $env{'environment.screenname'},
 2819:                  'plainname'    => $env{'environment.firstname'}.' '.
 2820: 		                   $env{'environment.middlename'}.' '.
 2821:                                    $env{'environment.lastname'}.' '.
 2822:                                    $env{'enrironment.generation'},
 2823:                  'attachmenturl'=> $attachmenturl,
 2824:                  'subject'      => $subject);
 2825:     if ($env{'form.replydisc'}) {
 2826: 	$contrib{'replyto'}=(split(/\:\:\:/,$env{'form.replydisc'}))[1];
 2827:     }
 2828:     if ($anon) {
 2829: 	$contrib{'anonymous'}='true';
 2830:     }
 2831:     if (($symb) && ($email)) {
 2832:         my $now = time;
 2833:         if ($env{'form.editdisc'}) {
 2834:             $contrib{'ip'}=$ENV{'REMOTE_ADDR'};
 2835:             $contrib{'host'}=$Apache::lonnet::perlvar{'lonHostID'};
 2836:             $contrib{'timestamp'} = $now;
 2837:             $contrib{'history'} = '';
 2838:             my $numoldver = 0;
 2839:             my ($oldsymb,$oldidx)=split(/\:\:\:/,$env{'form.editdisc'});
 2840: 	    &Apache::lonenc::check_decrypt(\$oldsymb);
 2841:             $oldsymb=~s|(bulletin___\d+___)adm/wrapper/|$1|;
 2842: # get timestamp for last post and history
 2843:             my %oldcontrib=&Apache::lonnet::restore($oldsymb,$env{'request.course.id'},
 2844:                      $env{'course.'.$env{'request.course.id'}.'.domain'},
 2845:                      $env{'course.'.$env{'request.course.id'}.'.num'});
 2846:             if (defined($oldcontrib{$oldidx.':replyto'})) {
 2847:                 $contrib{'replyto'} = $oldcontrib{$oldidx.':replyto'};
 2848:             }
 2849:             if (defined($oldcontrib{$oldidx.':history'})) {
 2850:                 if ($oldcontrib{$oldidx.':history'} =~ /:/) {
 2851:                     my @oldversions = split(/:/,$oldcontrib{$oldidx.':history'});
 2852:                     $numoldver = @oldversions;
 2853:                 } else {
 2854:                     $numoldver = 1;
 2855:                 }
 2856:                 $contrib{'history'} = $oldcontrib{$oldidx.':history'}.':';
 2857:             }
 2858:             my $numnewver = $numoldver + 1;
 2859:             if (defined($oldcontrib{$oldidx.':subject'})) {
 2860:                 if ($oldcontrib{$oldidx.':subject'} =~ /^<version num="0">/) {
 2861:                     $contrib{'subject'} = '<version num="'.$numnewver.'">'.&HTML::Entities::encode($contrib{'subject'},'<>&"').'</version>';
 2862:                     $contrib{'subject'} = $oldcontrib{$oldidx.':subject'}.$contrib{'subject'};
 2863:                 } else {
 2864:                     $contrib{'subject'} = '<version num="0">'.&HTML::Entities::encode($oldcontrib{$oldidx.':subject'},'<>&"').'</version><version num="1">'.&HTML::Entities::encode($contrib{'subject'},'<>&"').'</version>';
 2865:                 }
 2866:             } 
 2867:             if (defined($oldcontrib{$oldidx.':message'})) {
 2868:                 if ($oldcontrib{$oldidx.':message'} =~ /^<version num="0">/) {
 2869:                     $contrib{'message'} = '<version num="'.$numnewver.'">'.&HTML::Entities::encode($contrib{'message'},'<>&"').'</version>';
 2870:                     $contrib{'message'} = $oldcontrib{$oldidx.':message'}.$contrib{'message'};
 2871:                 } else {
 2872:                     $contrib{'message'} = '<version num="0">'.&HTML::Entities::encode($oldcontrib{$oldidx.':message'},'<>&"').'</version><version num="1">'.&HTML::Entities::encode($contrib{'message'},'<>&"').'</version>';
 2873:                 }
 2874:             }
 2875:             $contrib{'history'} .= $oldcontrib{$oldidx.':timestamp'};
 2876:             my $put_reply = &Apache::lonnet::putstore($env{'request.course.id'},
 2877:                   $oldsymb,$oldidx,\%contrib,
 2878:                   $env{'course.'.$env{'request.course.id'}.'.domain'},
 2879:                   $env{'course.'.$env{'request.course.id'}.'.num'});
 2880:             $status='Editing class discussion'.($anon?' (anonymous)':'');
 2881:         } else {
 2882:            $status='Adding to class discussion'.($anon?' (anonymous)':'').': '.
 2883:            &Apache::lonnet::store(\%contrib,$symb,$env{'request.course.id'},
 2884:                      $env{'course.'.$env{'request.course.id'}.'.domain'},
 2885: 		     $env{'course.'.$env{'request.course.id'}.'.num'});
 2886:         }
 2887:         my %storenewentry=($symb => $now);
 2888:         $status.='<br />'.&mt('Updating discussion time').': '.
 2889:         &Apache::lonnet::put('discussiontimes',\%storenewentry,
 2890:                      $env{'course.'.$env{'request.course.id'}.'.domain'},
 2891: 		     $env{'course.'.$env{'request.course.id'}.'.num'});
 2892:     }
 2893:     my %record=&Apache::lonnet::restore('_discussion');
 2894:     my ($temp)=keys(%record);
 2895:     unless ($temp=~/^error\:/) {
 2896:        my %newrecord=();
 2897:        $newrecord{'resource'}=$symb;
 2898:        $newrecord{'subnumber'}=$record{'subnumber'}+1;
 2899:        $status.='<br />'.&mt('Registering').': '.
 2900:                &Apache::lonnet::cstore(\%newrecord,'_discussion');
 2901:     }
 2902:     } else {
 2903: 	$status.='Failed.';
 2904:     }
 2905:     return $status.'<br />';   
 2906: }
 2907: 
 2908: sub get_discussion_info {
 2909:     my ($idx,%contrib) = @_;
 2910:     my $changelast = 0;
 2911:     my $count = 0;
 2912:     my $hiddenflag = 0;
 2913:     my $deletedflag = 0;
 2914:     my ($hidden,$deleted,%info,$newlastdisc);
 2915:     my $version = $contrib{'version'};
 2916:     if ($version) {
 2917:         for (my $id=$version; $id>0; $id--) {
 2918:             my $vkeys=$contrib{$id.':keys'};
 2919:             my @keys=split(/:/,$vkeys);
 2920:             if (grep(/^hidden$/,@keys)) {
 2921:                 if (!$hiddenflag) {
 2922:                     $hidden = $contrib{$id.':hidden'};
 2923:                     $hiddenflag = 1;
 2924:                 }
 2925:             } elsif (grep(/^deleted$/,@keys)) {
 2926:                 if (!$deletedflag) {
 2927:                     $deleted = $contrib{$id.':deleted'};
 2928:                     $deletedflag = 1;
 2929:                 }
 2930:             } else {
 2931:                 if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)) {
 2932:                     $count++;
 2933:                     $info{$count}{'id'} = $id;
 2934:                     $info{$count}{'timestamp'}=$contrib{$id.':timestamp'}; 
 2935:                 }
 2936:             }
 2937:         }
 2938:         if ($info{'1'}{'id'} == $idx) {
 2939:             $changelast = 1;
 2940:             if ($count > 1) { 
 2941:                 $newlastdisc =  $info{'2'}{'timestamp'};
 2942:             } else {
 2943:                 $newlastdisc = 0;
 2944:             }
 2945:         }
 2946:     }
 2947:     return ($changelast,$newlastdisc);
 2948: }
 2949: 
 2950: # ----------------------------------------------------------- Preview function
 2951: 
 2952: sub show_preview {
 2953:     my ($r) = @_;
 2954:     &Apache::loncommon::content_type($r,'text/html');
 2955:     $r->send_http_header;
 2956:     my $start_page=
 2957: 	&Apache::loncommon::start_page('Preview',undef,
 2958: 				       {'only_body'   => 1,});
 2959: 
 2960:     my $message=&clear_out_html($env{'form.comment'});
 2961:     &newline_to_br(\$message);
 2962:     $message=&Apache::lonspeller::markeduptext($message);
 2963:     $message=&Apache::lontexconvert::msgtexconverted($message);
 2964:     my $subject=&clear_out_html($env{'form.subject'},undef,1);
 2965:     $subject=~s/\n/\<br \/\>/g;
 2966:     $subject=&Apache::lontexconvert::msgtexconverted($subject);
 2967: 					
 2968:     my $end_page = &Apache::loncommon::end_page();
 2969: 
 2970:     $r->print($start_page.'<table border="2"><tr><td>'.
 2971: 	      '<b>'.&mt('Subject').':</b> '.$subject.'<br /><br />'.
 2972: 	      $message.'</td></tr></table>'.$end_page);
 2973: }
 2974: 
 2975: 
 2976: sub newline_to_br {
 2977:     my ($message)=@_;
 2978:     my $newmessage;
 2979:     my $parser=HTML::LCParser->new($message);
 2980:     while (my $token=$parser->get_token()) {
 2981: 	if ($token->[0] eq 'T') {
 2982: 	    my $text=$token->[1];
 2983: 	    $text=~s/\n/\<br \/\>/g;
 2984: 	    $newmessage.=$text;
 2985: 	} elsif ($token->[0] eq 'D' || $token->[0] eq 'C') {
 2986: 	    $newmessage.=$token->[1];
 2987: 	} elsif ($token->[0] eq 'PI' || $token->[0] eq 'E') {
 2988: 	    $newmessage.=$token->[2];
 2989: 	} elsif ($token->[0] eq 'S') {
 2990: 	    $newmessage.=$token->[4];
 2991: 	}
 2992: 	    
 2993:     }
 2994:     $$message=$newmessage;
 2995: }
 2996: 
 2997: sub generate_preview_button {
 2998:     my ($formname,$fieldname)=@_;
 2999:     unless ($formname) { $formname='mailform'; }
 3000:     unless ($fieldname) { $fieldname='comment'; }
 3001:     my $pre=&mt("Show Preview and Check Spelling");
 3002:     return(<<ENDPREVIEW);
 3003: <br />
 3004: <form name="preview" action="/adm/feedback?preview=1" method="post" target="preview">
 3005: <input type="hidden" name="subject">
 3006: <input type="hidden" name="comment" />
 3007: <input type="button" value="$pre"
 3008: onClick="if (typeof(document.$formname.onsubmit)=='function') {document.$formname.onsubmit();};this.form.comment.value=document.$formname.$fieldname.value;this.form.subject.value=document.$formname.subject.value;this.form.submit();" />
 3009: </form>
 3010: ENDPREVIEW
 3011: }
 3012: 
 3013: sub modify_attachments {
 3014:     my ($r,$currnewattach,$currdelold,$symb,$idx,$attachmenturls)=@_;
 3015: 
 3016:     my %lt = &Apache::lonlocal::texthash(
 3017:                'subj' => 'Subject',
 3018:                'thfo' => 'The following attachments were part of the most recent saved version of this posting.',
 3019:                'chth' => 'Check the checkboxes for any you wish to remove.',
 3020:                'thef' => 'The following attachments have been uploaded for inclusion with this posting.',
 3021:                'adda' => 'Add a new attachment to this post.',
 3022:                'stch' => 'Store Changes',
 3023:              );
 3024:     my $js = <<END;
 3025: <script type="text/javascript">
 3026:  function setAction () {
 3027:    document.modattachments.action = document.modattachments.origpage.value;
 3028:    document.modattachments.submit();
 3029:  }
 3030: </script> 
 3031: END
 3032: 
 3033:     my $start_page = 
 3034: 	&Apache::loncommon::start_page('Discussion Post Attachments',$js);
 3035: 
 3036:     my $orig_subject = &unescape($env{'form.subject'});
 3037:     my $subject=&clear_out_html($orig_subject,undef,1);
 3038:     $subject=~s/\n/\<br \/\>/g;
 3039:     $subject=&Apache::lontexconvert::msgtexconverted($subject);
 3040:     my $timestamp=$env{'form.timestamp'};
 3041:     my $numoldver=$env{'form.numoldver'};
 3042: 
 3043:     my $msg = '';
 3044:     my %attachments = ();
 3045:     my %currattach = ();
 3046:     if ($idx) {
 3047:         &extract_attachments($attachmenturls,$idx,$numoldver,\$msg,\%attachments,\%currattach,$currdelold);
 3048:     }
 3049:     &Apache::lonenc::check_encrypt(\$symb);
 3050: 
 3051:     my $end_page = 
 3052: 	&Apache::loncommon::end_page();
 3053: 				       
 3054:     $r->print(<<END);
 3055: $start_page
 3056: <form name="modattachments" method="post" enctype="multipart/form-data" action="/adm/feedback?attach=$symb">
 3057:  <table border="2">
 3058:   <tr>
 3059:    <td>
 3060:     <b>Subject:</b> $subject</b><br /><br />
 3061: END
 3062:     if ($idx) {
 3063:         if ($attachmenturls) {
 3064:             my @currold = keys(%currattach);
 3065:             if (@currold > 0) {
 3066:                 $r->print($lt{'thfo'}.'<br />'.$lt{'chth'}.'<br />'."\n");  
 3067:                 foreach my $id (@currold) {
 3068:                     my $attachurl = &HTML::Entities::decode($attachments{$id}{'filename'}); 
 3069:                     $attachurl =~ m#/([^/]+)$#;
 3070:                     $r->print('<label><input type="checkbox" name="deloldattach" value="'.$id.'" />&nbsp;'.$1.'</label><br />'."\n");
 3071:                 }
 3072:                 $r->print("<br />");
 3073:             }
 3074:         }
 3075:     }
 3076:     if ((ref($currnewattach) eq 'ARRAY') && (@{$currnewattach} > 0)) {
 3077:         $r->print($lt{'thef'}.'<br />'.$lt{'chth'}.'<br />'."\n");
 3078:         foreach my $attach (@{$currnewattach}) {
 3079:             $attach =~ m#/([^/]+)$#;
 3080:             $r->print('<label><input type="checkbox" name="delnewattach" value="'.$attach.'" />&nbsp;'.$1.'</label><br />'."\n");
 3081:         }
 3082:         $r->print("<br />"); 
 3083:     }
 3084:     $r->print(<<END);
 3085:    $lt{'adda'}&nbsp;<input type="file" name="addnewattach" /><input type="button" name="upload" value="Upload" onClick="this.form.submit()" />    
 3086:    </td>
 3087:   </tr>
 3088:  </table>
 3089: <input type="hidden" name="subject" value="$env{'form.subject'}" />
 3090: <input type="hidden" name="comment" value="$env{'form.comment'}" />
 3091: <input type="hidden" name="timestamp" value="$env{'form.timestamp'}" />
 3092: <input type="hidden" name="idx" value="$env{'form.idx'}" />
 3093: <input type="hidden" name="numoldver" value="$env{'form.numoldver'}" />
 3094: <input type="hidden" name="origpage" value="$env{'form.origpage'}" />
 3095: <input type="hidden" name="blog" value="$env{'form.blog'}" />
 3096: <input type="hidden" name="discuss" value="$env{'form.discuss'}" />
 3097: END
 3098:     foreach my $item (@{$currnewattach}) {
 3099:         $r->print('<input type="hidden" name="currnewattach" value="'.$item.'" />'."\n");
 3100:     }
 3101:     foreach my $item (@{$currdelold}) {
 3102:         $r->print('<input type="hidden" name="deloldattach" value="'.$item.'" />'."\n");
 3103:     }
 3104:     $r->print(<<END);
 3105:  <input type="button" name="rtntoedit" value="$lt{'stch'}" onClick="setAction()"/>
 3106: </form>
 3107: $end_page
 3108: END
 3109:     return;
 3110: }
 3111: 
 3112: sub process_attachments {
 3113:     my ($currnewattach,$currdelold,$keepold) = @_;
 3114: 
 3115:     @{$currnewattach}=
 3116: 	&Apache::loncommon::get_env_multiple('form.currnewattach');
 3117:     @{$currdelold}=
 3118: 	&Apache::loncommon::get_env_multiple('form.deloldattach');
 3119:     if (exists($env{'form.delnewattach'})) {
 3120:         my @currdelnew =
 3121: 	    &Apache::loncommon::get_env_multiple('form.delnewattach');
 3122:         my @currnew = ();
 3123:         foreach my $newone (@{$currnewattach}) {
 3124:             my $delflag = 0;
 3125:             foreach my $item (@currdelnew) {
 3126:                 if ($newone eq $item) {
 3127:                     $delflag = 1;
 3128:                     last;
 3129:                 }
 3130:             }
 3131:             unless ($delflag) {
 3132:                 push(@currnew, $newone);
 3133:             }
 3134:         }
 3135:         @{$currnewattach} = @currnew;
 3136:     }
 3137:     @{$keepold} = &Apache::loncommon::get_env_multiple('form.keepold');
 3138: }
 3139: 
 3140: sub generate_attachments_button {
 3141:     my ($idx,$attachnum,$ressymb,$now,$currnewattach,$deloldattach,
 3142:         $numoldver,$mode,$blockblog) = @_;
 3143:     my $origpage = $ENV{'REQUEST_URI'};
 3144:     my $att=$attachnum.' '.&mt("attachments");
 3145:     my %lt = &Apache::lonlocal::texthash(
 3146:                 'clic' => 'Click to add/remove attachments',
 3147:     ); 
 3148:     my $response = (<<END);
 3149: <br />
 3150: <form name="attachment" action="/adm/feedback?attach=$ressymb" method="post">
 3151: $lt{'clic'}:&nbsp;<input type="button" value="$att"
 3152: onClick="if (typeof(document.mailform.onsubmit)=='function') {document.mailform.onsubmit();};this.form.comment.value=escape(document.mailform.comment.value);this.form.subject.value=escape(document.mailform.subject.value);
 3153: END
 3154:     if (!$blockblog) {
 3155:         $response .= 'setblogvalue();';
 3156:     }
 3157:     unless ($mode eq 'board') {
 3158:         $response .= 'javascript:anonchk();';
 3159:     }
 3160:     $response .= (<<ENDATTACH);
 3161: this.form.submit();" />
 3162: <input type="hidden" name="origpage" value="$origpage" />
 3163: <input type="hidden" name="idx" value="$idx" />
 3164: <input type="hidden" name="timestamp" value="$now" />
 3165: <input type="hidden" name="subject" />
 3166: <input type="hidden" name="comment" />
 3167: <input type="hidden" name="blog" value = "0" />
 3168: <input type="hidden" name="discuss" value = "0" />
 3169: <input type="hidden" name="numoldver" value="$numoldver" />
 3170: ENDATTACH
 3171:     if (defined($deloldattach)) {
 3172:         if (@{$deloldattach} > 0) {
 3173:             foreach my $delatt (@{$deloldattach}) {
 3174:                 $response .= '<input type="hidden" name="deloldattach" value="'.$delatt.'" />'."\n";
 3175:             }
 3176:         }
 3177:     }
 3178:     if (defined($currnewattach)) {
 3179:         if (@{$currnewattach} > 0) {
 3180:             foreach my $attach (@{$currnewattach}) {
 3181:                 $response .= '<input type="hidden" name="currnewattach" value="'.$attach.'" />'."\n";
 3182:             }
 3183:         }
 3184:     }
 3185:     $response .= '</form>';
 3186:     return $response;
 3187: }
 3188: 
 3189: sub extract_attachments {
 3190:     my ($attachmenturls,$idx,$numoldver,$message,$attachments,$currattach,$currdelold) = @_;
 3191:     %{$attachments}=();
 3192:     &get_post_attachments($attachments,$attachmenturls);
 3193:     foreach my $id (sort(keys(%{$attachments}))) {
 3194:         if (exists($$attachments{$id}{$numoldver})) {
 3195:             if (defined($currdelold)) {
 3196:                 if (@{$currdelold} > 0) {
 3197:                     unless (grep/^$id$/,@{$currdelold}) {
 3198:                         $$currattach{$id} = $$attachments{$id}{$numoldver}; 
 3199:                     }
 3200:                 } else {
 3201:                     $$currattach{$id} = $$attachments{$id}{$numoldver};
 3202:                 }
 3203:             } else {
 3204:                 $$currattach{$id} = $$attachments{$id}{$numoldver};
 3205:             }
 3206:         }
 3207:     }
 3208:     my @attached = (sort { $a <=> $b } keys(%{$currattach}));
 3209:     if (@attached == 1) {
 3210:         my $id = $attached[0];
 3211:         my $attachurl;
 3212:         if ($attachmenturls =~ m/^<attachment id="0">/) {
 3213:             $attachurl = &HTML::Entities::decode($$attachments{$id}{'filename'});
 3214:         } else {
 3215:             $attachurl = $$attachments{$id}{'filename'};
 3216:         }
 3217:         $attachurl=~m|/([^/]+)$|;
 3218:         $$message.='<br /><a href="'.$attachurl.'"><tt>'.
 3219:         $1.'</tt></a><br />';
 3220:         &Apache::lonnet::allowuploaded('/adm/feedback',
 3221:                                $attachurl);
 3222:     } elsif (@attached > 1) {
 3223:         $$message.='<ol>';
 3224:         foreach my $attach (@attached) {
 3225:             my $id = $attach;
 3226:             my $attachurl = &HTML::Entities::decode($$attachments{$id}{'filename'});
 3227:             my ($fname)
 3228:               =($attachurl=~m|/([^/]+)$|);
 3229:             $$message .= '<li><a href="'.$attachurl.
 3230:               '"><tt>'.
 3231:               $fname.'</tt></a></li>';
 3232:             &Apache::lonnet::allowuploaded('/adm/feedback',
 3233:                              $attachurl);
 3234:         }
 3235:         $$message .= '</ol>';
 3236:     }
 3237: }
 3238: 
 3239: sub construct_attachmenturl {
 3240:     my ($currnewattach,$keepold,$symb,$idx)=@_;
 3241:     my $oldattachmenturl;
 3242:     my $newattachmenturl;
 3243:     my $startnum = 0;
 3244:     my $currver = 0;
 3245:     if (($env{'form.editdisc'}) && ($idx)) {
 3246:         my %contrib=&Apache::lonnet::restore($symb,$env{'request.course.id'},
 3247:                        $env{'course.'.$env{'request.course.id'}.'.domain'},
 3248:                        $env{'course.'.$env{'request.course.id'}.'.num'});
 3249:         $oldattachmenturl = $contrib{$idx.':attachmenturl'};
 3250:         if ($contrib{$idx.':history'}) {
 3251:             if ($contrib{$idx.':history'} =~ /:/) {
 3252:                 my @oldversions = split(/:/,$contrib{$idx.':history'});
 3253:                 $currver = 1 + scalar(@oldversions);
 3254:             } else {
 3255:                 $currver = 2;
 3256:             }
 3257:         } else {
 3258:             $currver = 1;
 3259:         }
 3260:         if ($oldattachmenturl) {
 3261:             if ($oldattachmenturl =~ m/^<attachment id="0">/) {
 3262:                 my %attachments = ();
 3263:                 my $prevver = $currver-1;
 3264:                 &get_post_attachments(\%attachments,$oldattachmenturl);
 3265:                 my $numattach = scalar(keys(%attachments));
 3266:                 $startnum += $numattach;
 3267:                 foreach my $num (sort {$a <=> $b} keys(%attachments)) {
 3268:                     $newattachmenturl .= '<attachment id="'.$num.'"><filename>'.$attachments{$num}{'filename'}.'</filename>';
 3269:                     foreach my $item (sort {$a <=> $b} keys(%{$attachments{$num}})) {
 3270:                         unless ($item eq 'filename') {
 3271:                             $newattachmenturl .= '<post id="'.$item.'">'.$attachments{$num}{$item}.'</post>';
 3272:                         }
 3273:                     }
 3274:                     if (grep/^$num$/,@{$keepold}) {
 3275:                         $newattachmenturl .= '<post id="'.$currver.'">'.$attachments{$num}{$prevver}.'</post>';
 3276:                     }
 3277:                     $newattachmenturl .= '</attachment>';
 3278:                 }
 3279:             } else {
 3280:                 $newattachmenturl = '<attachment id="0"><filename>'.&HTML::Entities::encode($oldattachmenturl).'</filename><post id="0">n</post>';
 3281:                 unless (grep/^0$/,@{$keepold}) {
 3282:                     $newattachmenturl .= '<post id="1">n</post>';
 3283:                 }
 3284:                 $newattachmenturl .= '</attachment>';
 3285:                 $startnum ++;
 3286:             }
 3287:         }
 3288:     }
 3289:     for (my $i=0; $i<@{$currnewattach}; $i++) {
 3290:         my $attachnum = $startnum + $i;
 3291:         $newattachmenturl .= '<attachment id="'.$attachnum.'"><filename>'.&HTML::Entities::encode($$currnewattach[$i]).'</filename><post id="'.$currver.'">n</post></attachment>';
 3292:     }
 3293:     return $newattachmenturl; 
 3294: }
 3295: 
 3296: sub add_blog_checkbox {
 3297:     my ($checkstatus);
 3298:     if ($env{'form.blog'}) {
 3299:         $checkstatus = 'checked="checked"';
 3300:     }
 3301:     my $output = '
 3302: <script type="text/javascript">
 3303: function setblogvalue() {
 3304:     if (document.mailform.blog.checked) {
 3305:         document.attachment.blog.value = 1;
 3306:     } else {
 3307:         document.attachment.blog.value = 0;
 3308:     }
 3309: }
 3310: </script><br />
 3311: <label><input type="checkbox" name="blog" '.$checkstatus.' /> '.
 3312: &mt('Add to my public course blog').'</label><br />'."\n";
 3313:     return $output;
 3314: }
 3315: 
 3316: sub has_discussion {
 3317:     my $resourcesref = shift;
 3318:     my $navmap = Apache::lonnavmaps::navmap->new();
 3319:     my @allres=$navmap->retrieveResources();
 3320:     foreach my $resource (@allres) {
 3321:         if ($resource->hasDiscussion()) {
 3322:             my $ressymb = $resource->wrap_symb();
 3323:             push(@{$resourcesref}, $ressymb);
 3324:         }
 3325:     }
 3326:     return;
 3327: }
 3328: 
 3329: sub sort_filter_names {
 3330:     my ($sort_types,$role_types,$status_types) = @_;
 3331:     %{$sort_types} = (
 3332:                      ascdate => 'Date order - oldest first',
 3333:                      descdate => 'Date order - newest first',
 3334:                      thread => 'Threaded',
 3335:                      subject => 'By subject',
 3336:                      username => 'By domain and username',
 3337:                      lastfirst => 'By last name, first name'
 3338:                    );
 3339:     %{$role_types} = (
 3340:                      all => 'All roles',
 3341:                      st  => 'Students',
 3342:                      cc  => 'Course Coordinators',
 3343:                      in  => 'Instructors',
 3344:                      ta  => 'TAs',
 3345:                      ep  => 'Exam proctors',
 3346:                      ad  => 'Administrators',
 3347:                      cr  => 'Custom roles'
 3348:                    );
 3349:     %{$status_types} = (
 3350:                      all     => 'Roles of any status',
 3351:                      Active  => 'Only active roles',
 3352:                      Expired => 'Only past roles',
 3353:                      Future  => 'Only future roles',
 3354:                    );
 3355: }
 3356:   
 3357: sub handler {
 3358:   my $r = shift;
 3359:   if ($r->header_only) {
 3360:      &Apache::loncommon::content_type($r,'text/html');
 3361:      $r->send_http_header;
 3362:      return OK;
 3363:   }
 3364: 
 3365: # --------------------------- Get query string for limited number of parameters
 3366: 
 3367:   &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
 3368:          ['hide','unhide','deldisc','postdata','preview','replydisc','editdisc','cmd','symb','onlyunread','allposts','onlyunmark','previous','markread','markonread','markondisp','toggoff','toggon','modifydisp','changes','navtime','navmaps','navurl','sortposts','applysort','rolefilter','statusfilter','sectionpick','groupick','posterlist','userpick','attach','origpage','currnewattach','deloldattach','keepold','allversions','export','sendmessageonly','group','ref']);
 3369:   my $group = $env{'form.group'};
 3370:   if ($env{'form.editdisc'}) {
 3371:       if (!(&editing_allowed($env{'form.editdisc'},$env{'form.group'}))) {
 3372:           my $symb=(split(/\:\:\:/,$env{'form.editdisc'}))[0];
 3373:           my ($map,$id,$url)=&Apache::lonnet::decode_symb($symb);
 3374:           my $feedurl=&Apache::lonnet::clutter($url);
 3375:           &redirect_back($r,$feedurl,&mt('Editing not permitted').'<br />',                     '0','0','','',$env{'form.previous'},undef,undef,undef,
 3376:                     undef,undef,undef,$group);
 3377:           return OK;
 3378:       }
 3379:   } 
 3380:   if ($env{'form.discsymb'}) {
 3381:       my ($symb,$feedurl) = &get_feedurl_and_clean_symb($env{'form.discsymb'});
 3382:       my $readkey = $symb.'_read';
 3383:       my $chgcount = 0;
 3384:       my %readinghash = &Apache::lonnet::get('nohist_'.$env{'request.course.id'}.'_discuss',[$readkey],$env{'user.domain'},$env{'user.name'});
 3385:       foreach my $key (keys(%env)) {
 3386:           if ($key =~ m/^form\.postunread_(\d+)/) {
 3387:               if ($readinghash{$readkey} =~ /\.$1\./) {
 3388:                   $readinghash{$readkey} =~ s/\.$1\.//;
 3389:                   $chgcount ++;
 3390:               }
 3391:           } elsif ($key =~ m/^form\.postread_(\d+)/) {
 3392:               unless ($readinghash{$readkey} =~ /\.$1\./) {
 3393:                   $readinghash{$readkey} .= '.'.$1.'.';
 3394:                   $chgcount ++;
 3395:               }
 3396:           }
 3397:       }
 3398:       if ($chgcount > 0) {
 3399:           &Apache::lonnet::put('nohist_'.$env{'request.course.id'}.'_discuss',
 3400: 			  \%readinghash,$env{'user.domain'},$env{'user.name'});
 3401:       }
 3402:       &redirect_back($r,$feedurl,&mt('Marked postings read/unread').'<br />',
 3403: 		     '0','0','','',$env{'form.previous'},'','','',
 3404:                      undef,undef,undef,$group);
 3405:       return OK;
 3406:   }
 3407:   if ($env{'form.allversions'}) {
 3408:       &Apache::loncommon::content_type($r,'text/html');
 3409:       &Apache::loncommon::no_cache($r);
 3410:       $r->send_http_header;
 3411: 
 3412:       $r->print(&Apache::loncommon::start_page('Discussion Post Versions'));
 3413: 
 3414:       my $crs='/'.$env{'request.course.id'};
 3415:       if ($env{'request.course.sec'}) {
 3416:           $crs.='_'.$env{'request.course.sec'};
 3417:       }
 3418:       $crs=~s|_|/|g;
 3419:       my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
 3420:       my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
 3421:       my ($symb,$idx)=split(/\:\:\:/,$env{'form.allversions'});
 3422:       ($symb)=&get_feedurl_and_clean_symb($symb);
 3423:       my $ressymb = &wrap_symb($symb);
 3424:       my $group = $env{'form.group'};
 3425:       my $seeid;
 3426:       if (($group ne '') && (($ressymb =~ m|^bulletin___\d+___adm/wrapper/adm/\Q$cdom\E/\Q$cnum\E/\d+/bulletinboard$|))) {
 3427:           if (&check_group_priv($group,'dgp') eq 'ok') {
 3428:               $seeid = 1;
 3429:           }
 3430:       } else {
 3431:           $seeid = &Apache::lonnet::allowed('rin',$crs);
 3432:       }
 3433:       if ($idx > 0) {
 3434:           my %messages = ();
 3435:           my %subjects = ();
 3436:           my %attachmsgs = ();
 3437:           my %allattachments = ();
 3438:           my %imsfiles = ();
 3439:           my ($screenname,$plainname);
 3440:           my %contrib=&Apache::lonnet::restore($symb,$env{'request.course.id'},
 3441:                            $env{'course.'.$env{'request.course.id'}.'.domain'},
 3442:                            $env{'course.'.$env{'request.course.id'}.'.num'});
 3443:           $r->print(&get_post_contents(\%contrib,$idx,$seeid,'allversions',\%messages,\%subjects,\%allattachments,\%attachmsgs,\%imsfiles,\$screenname,\$plainname));
 3444:       }
 3445:       $r->print(&Apache::loncommon::end_page());
 3446:       return OK;
 3447:   }
 3448:   if ($env{'form.posterlist'}) {
 3449:       my ($symb,$feedurl)=&get_feedurl_and_clean_symb($env{'form.applysort'});
 3450:       &print_showposters($r,$symb,$env{'form.previous'},$feedurl,
 3451: 			 $env{'form.sortposts'});
 3452:       return OK;
 3453:   }
 3454:   if ($env{'form.userpick'}) {
 3455:       my @posters = &Apache::loncommon::get_env_multiple('form.stuinfo');
 3456:       my ($symb,$feedurl)=&get_feedurl_and_clean_symb($env{'form.userpick'});
 3457:       my $numpicks = @posters;
 3458:       my %discinfo;
 3459:       $discinfo{$symb.'_userpick'} = join('&',@posters);
 3460:       &Apache::lonnet::put('nohist_'.$env{'request.course.id'}.'_discuss',
 3461: 			   \%discinfo,$env{'user.domain'},$env{'user.name'});
 3462:       &redirect_back($r,$feedurl,&mt('Changed sort/filter').'<br />','0','0','',
 3463: 		     '',$env{'form.previous'},$env{'form.sortposts'},'','','',
 3464: 		     '',$numpicks,$group);
 3465:       return OK;
 3466:   }
 3467:   if ($env{'form.applysort'}) {
 3468:       my ($symb,$feedurl)=&get_feedurl_and_clean_symb($env{'form.applysort'});
 3469:       &redirect_back($r,$feedurl,&mt('Changed sort/filter').'<br />','0','0','',
 3470: 		     '',$env{'form.previous'},$env{'form.sortposts'},
 3471: 		     $env{'form.rolefilter'},$env{'form.statusfilter'},
 3472: 		     $env{'form.sectionpick'},$env{'form.grouppick'},
 3473:                      undef,$group);
 3474:       return OK;
 3475:   } elsif ($env{'form.cmd'} eq 'sortfilter') {
 3476:       my ($symb,$feedurl)=&get_feedurl_and_clean_symb($env{'form.symb'});
 3477:       &print_sortfilter_options($r,$symb,$env{'form.previous'},$feedurl);
 3478:       return OK;
 3479:   } elsif ($env{'form.navtime'}) {
 3480:       my %discinfo = ();
 3481:       my @resources = ();
 3482:       if (defined($env{'form.navmaps'})) {
 3483:           if ($env{'form.navmaps'} =~ /:/) {
 3484:               @resources = split(/:/,$env{'form.navmaps'});
 3485:           } else {
 3486:               @resources = ("$env{'form.navmaps'}");
 3487:           }
 3488:       } else {
 3489:           &has_discussion(\@resources);
 3490:       }
 3491:       my $numitems = @resources;
 3492:       my $feedurl = '/adm/navmaps';
 3493:       if ($env{'form.navurl'}) { $feedurl .= '?'.$env{'form.navurl'}; }
 3494:       my %lt = &Apache::lonlocal::texthash(
 3495:           'mnpa' => 'Marked "New" posts as read in a total of',
 3496:           'robb' => 'resources/bulletin boards.',
 3497:           'twnp' => 'There are currently no resources or bulletin boards with unread discussion postings.'
 3498:       );       
 3499:       foreach my $res (@resources) {
 3500:           my $ressymb=$res;
 3501: 	  &Apache::lonenc::check_decrypt(\$ressymb);
 3502:           my $lastkey = $ressymb.'_lastread';
 3503:           $discinfo{$lastkey} = $env{'form.navtime'};
 3504:       }
 3505:       my $textline = "<b>$lt{'mnpa'} $numitems $lt{'robb'}</b>";
 3506:       if ($numitems > 0) {
 3507:           &Apache::lonnet::put('nohist_'.$env{'request.course.id'}.'_discuss',
 3508: 			     \%discinfo,$env{'user.domain'},$env{'user.name'});
 3509:       } else {
 3510:           $textline = "<b>$lt{'twnp'}</b>";
 3511:       }
 3512:       &Apache::loncommon::content_type($r,'text/html');
 3513:       $r->send_http_header;
 3514:       my $logo=&Apache::loncommon::lonhttpdurl('/adm/lonIcons/lonlogos.gif');
 3515:       my %onload;
 3516:       if ($env{'environment.remote'} ne 'off') {
 3517: 	  $onload{'onload'} =
 3518: 	      "if (window.name!='loncapaclient') { this.document.reldt.submit(); self.window.close(); }";
 3519:       }
 3520: 
 3521:       my $start_page=
 3522: 	  &Apache::loncommon::start_page('New posts marked as read',undef,
 3523: 					 {'redirect'    => [2,$feedurl],
 3524: 					  'only_body'   => 1,
 3525: 					  'add_entries' => \%onload});
 3526:       my $end_page = &Apache::loncommon::end_page();
 3527:       $r->print (<<ENDREDIR);
 3528: $start_page
 3529: <img align="right" src="$logo" />
 3530: $textline
 3531: <form name="reldt" action="$feedurl" target="loncapaclient">
 3532: </form>
 3533: <br />
 3534: $end_page
 3535: ENDREDIR
 3536:       return OK;
 3537:   } elsif ($env{'form.modifydisp'}) {
 3538:       my ($symb,$feedurl)=&get_feedurl_and_clean_symb($env{'form.modifydisp'});
 3539:       my ($dispchgA,$dispchgB,$markchg,$toggchg) = 
 3540: 	  split(/_/,$env{'form.changes'});
 3541:       &print_display_options($r,$symb,$env{'form.previous'},$dispchgA,
 3542: 			     $dispchgB,$markchg,$toggchg,$feedurl);
 3543:       return OK;
 3544:   } elsif ($env{'form.markondisp'} || $env{'form.markonread'} ||
 3545: 	   $env{'form.allposts'}   || $env{'form.onlyunread'} ||
 3546: 	   $env{'form.onlyunmark'} || $env{'form.toggoff'}    ||
 3547: 	   $env{'form.toggon'}     || $env{'form.markread'}) {
 3548:       my ($symb,$feedurl)=&get_feedurl_and_clean_symb($env{'form.symb'});
 3549:       my %discinfo;
 3550: # ------------------------ Modify setting for read/unread toggle for each post 
 3551:       if ($env{'form.toggoff'}) { $discinfo{$symb.'_readtoggle'}=0; }
 3552:       if ($env{'form.toggon'})  { $discinfo{$symb.'_readtoggle'}=1; }
 3553: # --------- Modify setting for identification of 'NEW' posts in this discussion
 3554:       if ($env{'form.markondisp'}) {
 3555: 	  $discinfo{$symb.'_lastread'} = time;
 3556: 	  $discinfo{$symb.'_markondisp'} = 1;
 3557:       }
 3558:       if ($env{'form.markonread'}) {
 3559: 	  if ( $env{'form.previous'} > 0 ) {
 3560: 	      $discinfo{$symb.'_lastread'} = $env{'form.previous'};
 3561: 	  }
 3562: 	  $discinfo{$symb.'_markondisp'} = 0;
 3563:       }
 3564: # --------------------------------- Modify display setting for this discussion 
 3565:       if ($env{'form.allposts'}) {
 3566: 	  $discinfo{$symb.'_showonlyunread'} = 0;
 3567: 	  $discinfo{$symb.'_showonlyunmark'} = 0;
 3568:       }
 3569:       if ($env{'form.onlyunread'}) { $discinfo{$symb.'_showonlyunread'} = 1;  }
 3570:       if ($env{'form.onlyunmark'}) { $discinfo{$symb.'_showonlyunmark'} = 1;  }
 3571: # ----------------------------------------------------- Mark new posts not NEW 
 3572:       if ($env{'form.markread'})   { $discinfo{$symb.'_lastread'} = time; }
 3573:       &Apache::lonnet::put('nohist_'.$env{'request.course.id'}.'_discuss',
 3574: 			   \%discinfo,$env{'user.domain'},$env{'user.name'});
 3575:       my $previous=$env{'form.previous'};
 3576:       if ($env{'form.markondisp'}) { $previous=undef; }
 3577:       &redirect_back($r,$feedurl,&mt('Changed display status').'<br />',
 3578: 		     '0','0','','',$previous,'','','','','','',$group);
 3579:       return OK;
 3580:   } elsif (($env{'form.hide'}) || ($env{'form.unhide'})) {
 3581: # ----------------------------------------------------------------- Hide/unhide
 3582:       my $entry=$env{'form.hide'}?$env{'form.hide'}:$env{'form.unhide'};
 3583:       my ($symb,$idx)=split(/\:\:\:/,$entry);
 3584:       ($symb,my $feedurl)=&get_feedurl_and_clean_symb($symb);
 3585: 
 3586:       my $crs='/'.$env{'request.course.id'};
 3587:       if ($env{'request.course.sec'}) {
 3588:           $crs.='_'.$env{'request.course.sec'};
 3589:       }
 3590:       $crs=~s/\_/\//g;
 3591:       my $seeid=&Apache::lonnet::allowed('rin',$crs);
 3592: 
 3593:       if ($env{'form.hide'} && !$seeid && !(&editing_allowed($env{'form.hide'},$env{'form.group'}))) {
 3594:           &redirect_back($r,$feedurl,&mt('Deletion not permitted').'<br />',                 '0','0','','',$env{'form.previous'},'','','','',
 3595:                  undef,undef,$group,);
 3596:           return OK;
 3597:       }
 3598: 
 3599:       my %contrib=&Apache::lonnet::restore($symb,$env{'request.course.id'},
 3600:                           $env{'course.'.$env{'request.course.id'}.'.domain'},
 3601: 		          $env{'course.'.$env{'request.course.id'}.'.num'});
 3602: 
 3603:       my $currenthidden=$contrib{'hidden'};
 3604:       my $currentstudenthidden=$contrib{'studenthidden'};
 3605: 
 3606:       if ($env{'form.hide'}) {
 3607: 	  $currenthidden.='.'.$idx.'.';
 3608: 	  unless ($seeid) {
 3609: 	      $currentstudenthidden.='.'.$idx.'.';
 3610: 	  }
 3611:       } else {
 3612: 	  $currenthidden=~s/\.$idx\.//g;
 3613:       }
 3614:       my %newhash=('hidden' => $currenthidden);
 3615:       if ( ($env{'form.hide'}) && (!$seeid) ) {
 3616: 	  $newhash{'studenthidden'} = $currentstudenthidden;
 3617:       }
 3618:       if ($env{'form.hide'}) {
 3619:           my $changelast = 0;
 3620:           my $newlast;
 3621:           ($changelast,$newlast) = &get_discussion_info($idx,%contrib);
 3622:           if ($changelast) {
 3623:               &Apache::lonnet::put('discussiontimes',{$symb => $newlast},
 3624:                      $env{'course.'.$env{'request.course.id'}.'.domain'},
 3625:                      $env{'course.'.$env{'request.course.id'}.'.num'});
 3626:           }
 3627:       }
 3628:       &Apache::lonnet::store(\%newhash,$symb,$env{'request.course.id'},
 3629:                            $env{'course.'.$env{'request.course.id'}.'.domain'},
 3630: 			   $env{'course.'.$env{'request.course.id'}.'.num'});
 3631: 
 3632:       &redirect_back($r,$feedurl,&mt('Changed discussion status').'<br />',
 3633: 		     '0','0','','',$env{'form.previous'},undef,undef,undef,
 3634:                      undef,undef,undef,$group);
 3635:       return OK;
 3636:   } elsif ($env{'form.cmd'}=~/^(threadedoff|threadedon)$/) {
 3637:       my ($symb,$feedurl)=&get_feedurl_and_clean_symb($env{'form.symb'});
 3638:       if ($env{'form.cmd'} eq 'threadedon') {
 3639: 	  &Apache::lonnet::put('environment',{'threadeddiscussion' => 'on'});
 3640: 	  &Apache::lonnet::appenv('environment.threadeddiscussion' => 'on');
 3641:       } else {
 3642:  	  &Apache::lonnet::del('environment',['threadeddiscussion']);
 3643: 	  &Apache::lonnet::delenv('environment\.threadeddiscussion');
 3644:       }
 3645:       &redirect_back($r,$feedurl,&mt('Changed discussion view mode').'<br />',
 3646: 		     '0','0','','',$env{'form.previous'},undef,undef,undef,
 3647:                      undef,undef,undef,$group);
 3648:       return OK;
 3649:   } elsif ($env{'form.deldisc'}) {
 3650: # --------------------------------------------------------------- Hide for good
 3651:       my ($symb,$idx)=split(/\:\:\:/,$env{'form.deldisc'});
 3652:       ($symb,my $feedurl)=&get_feedurl_and_clean_symb($symb);
 3653:       my %contrib=&Apache::lonnet::restore($symb,$env{'request.course.id'},
 3654:                           $env{'course.'.$env{'request.course.id'}.'.domain'},
 3655: 		          $env{'course.'.$env{'request.course.id'}.'.num'});
 3656:       my ($changelast,$newlast) = &get_discussion_info($idx,%contrib);
 3657:       if ($changelast) {
 3658:           &Apache::lonnet::put('discussiontimes',{$symb => $newlast},
 3659:                    $env{'course.'.$env{'request.course.id'}.'.domain'},                   $env{'course.'.$env{'request.course.id'}.'.num'});
 3660:       }
 3661:       my %newhash=('deleted' => $contrib{'deleted'}.".$idx.");
 3662:       &Apache::lonnet::store(\%newhash,$symb,$env{'request.course.id'},
 3663: 			   $env{'course.'.$env{'request.course.id'}.'.domain'},
 3664: 			   $env{'course.'.$env{'request.course.id'}.'.num'});
 3665:       &redirect_back($r,$feedurl,&mt('Changed discussion status').'<br />',
 3666: 		     '0','0','','',$env{'form.previous'},undef,undef,undef,
 3667:                      undef,undef,undef,$group);
 3668:       return OK;
 3669:   } elsif ($env{'form.preview'}) {
 3670: # -------------------------------------------------------- User wants a preview
 3671:       &show_preview($r);
 3672:       return OK;
 3673:   } elsif ($env{'form.attach'}) {
 3674: # -------------------------------------------------------- Work on attachments
 3675:       &Apache::loncommon::content_type($r,'text/html');
 3676:       $r->send_http_header;
 3677:       &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['subject','comment','addnewattach','delnewattach','timestamp','numoldver','idx','discuss','blog']);
 3678:       my (@currnewattach,@currdelold,@keepold);
 3679:       &process_attachments(\@currnewattach,\@currdelold,\@keepold);
 3680:       if (exists($env{'form.addnewattach.filename'})) {
 3681:           unless (length($env{'form.addnewattach'})>131072) {
 3682:               my $subdir = 'feedback/'.$env{'form.timestamp'};
 3683:               my $newattachment=&Apache::lonnet::userfileupload('addnewattach',undef,$subdir);
 3684: 	      push(@currnewattach, $newattachment);
 3685:           }
 3686:       }
 3687:       my $attachmenturls;
 3688:       my ($symb) = &get_feedurl_and_clean_symb($env{'form.attach'});
 3689:       my $idx = $env{'form.idx'};
 3690:       if ($idx) {
 3691:           my %contrib=&Apache::lonnet::restore($symb,$env{'request.course.id'},
 3692:                          $env{'course.'.$env{'request.course.id'}.'.domain'},
 3693:                          $env{'course.'.$env{'request.course.id'}.'.num'});
 3694:           $attachmenturls = $contrib{$idx.':attachmenturl'};
 3695:       }
 3696:       &modify_attachments($r,\@currnewattach,\@currdelold,$symb,$idx,
 3697: 			  $attachmenturls);
 3698:       return OK;
 3699:   } elsif ($env{'form.export'}) {
 3700:       &Apache::loncommon::content_type($r,'text/html');
 3701:       $r->send_http_header;
 3702:       my ($symb,$feedurl) = &get_feedurl_and_clean_symb($env{'form.export'});
 3703:       my $mode='board';
 3704:       my $status='OPEN';
 3705:       my $previous=$env{'form.previous'};
 3706:       if ($feedurl =~ /\.(problem|exam|quiz|assess|survey|form|library|task)$/) {
 3707:           $mode='problem';
 3708:           $status=$Apache::inputtags::status[-1];
 3709:       }
 3710:       my $discussion = &list_discussion($mode,$status,$symb); 
 3711:       my $start_page = 
 3712: 	  &Apache::loncommon::start_page('Resource Feedback and Discussion');
 3713:       my $end_page = 
 3714: 	  &Apache::loncommon::end_page();
 3715:       $r->print($start_page.$discussion.$end_page);
 3716:       return OK;
 3717:   } else {
 3718: # ------------------------------------------------------------- Normal feedback
 3719:       my $feedurl=$env{'form.postdata'};
 3720:       $feedurl=~s/^http\:\/\///;
 3721:       $feedurl=~s/^$ENV{'SERVER_NAME'}//;
 3722:       $feedurl=~s/^$ENV{'HTTP_HOST'}//;
 3723:       $feedurl=~s/\?.+$//;
 3724: 
 3725:       my $symb;
 3726:       if ($env{'form.replydisc'}) {
 3727: 	  $symb=(split(/\:\:\:/,$env{'form.replydisc'}))[0];
 3728: 	  my ($map,$id,$url)=&Apache::lonnet::decode_symb($symb);
 3729: 	  $feedurl=&Apache::lonnet::clutter($url);
 3730:       } elsif ($env{'form.editdisc'}) {
 3731: 	  $symb=(split(/\:\:\:/,$env{'form.editdisc'}))[0];
 3732: 	  my ($map,$id,$url)=&Apache::lonnet::decode_symb($symb);
 3733: 	  $feedurl=&Apache::lonnet::clutter($url);
 3734:       } elsif ($env{'form.origpage'}) {
 3735: 	  $symb=""; 
 3736:       } else {
 3737: 	  $symb=&Apache::lonnet::symbread($feedurl);
 3738:       }
 3739:       unless ($symb) {
 3740: 	  $symb=$env{'form.symb'};
 3741: 	  if ($symb) {
 3742: 	      my ($map,$id,$url)=&Apache::lonnet::decode_symb($symb);
 3743: 	      $feedurl=&Apache::lonnet::clutter($url);
 3744: 	  }
 3745:       }
 3746:       &Apache::lonenc::check_decrypt(\$symb);
 3747:       my $goahead=1;
 3748:       if ($feedurl=~/\.(problem|exam|quiz|assess|survey|form|task)$/) {
 3749: 	  unless ($symb) { $goahead=0; }
 3750:       }
 3751:       # backward compatibility (bulletin boards used to be 'wrapped')
 3752:       &dewrapper(\$feedurl);
 3753:       if (!$goahead) {
 3754:           # Ambiguous Problem Resource
 3755: 	  $r->internal_redirect('/adm/ambiguous');
 3756: 	  return OK;
 3757:       }
 3758: # Go ahead with feedback, no ambiguous reference
 3759:       unless (
 3760: 	  (
 3761: 	   ($feedurl=~m:^/res:) && ($feedurl!~m:^/res/adm:)
 3762: 	   ) 
 3763: 	  || 
 3764: 	  ($env{'request.course.id'} && ($feedurl!~m:^/adm:))
 3765: 	  ||
 3766: 	  ($env{'request.course.id'} && ($symb=~/^bulletin\_\_\_/))
 3767: 	  ) {
 3768: 	  &Apache::loncommon::content_type($r,'text/html');
 3769: 	  $r->send_http_header;
 3770: # Unable to give feedback
 3771:           &Apache::lonenc::check_encrypt(\$feedurl);
 3772: 	  &no_redirect_back($r,$feedurl);
 3773: 	  return OK;
 3774:       }
 3775: # --------------------------------------------------- Print login screen header
 3776:       unless ($env{'form.sendit'}) {
 3777:           &Apache::lonenc::check_encrypt(\$feedurl);
 3778: 	  &Apache::loncommon::content_type($r,'text/html');
 3779: 	  $r->send_http_header;
 3780:           if (($env{'form.replydisc'}) || ($env{'form.editdisc'})) {
 3781:               my ($blocked,$blocktext) = 
 3782:                      &Apache::loncommon::blocking_status('boards');
 3783:               if ($blocked) {
 3784:                   $r->print(&blocked_reply_or_edit($blocktext));
 3785:                   return OK;
 3786:               }
 3787:           }
 3788: 	  my $options=&screen_header($feedurl,$symb);
 3789: 	  if ($options) {
 3790: 	      &mail_screen($r,$feedurl,$options);
 3791: 	  } else {
 3792: 	      &fail_redirect($r,$feedurl);
 3793: 	  }
 3794: 	  return OK;
 3795:       }
 3796:       
 3797: # Get previous user input
 3798:       my $prevattempts=&Apache::loncommon::get_previous_attempt(
 3799:                                    $symb,$env{'user.name'},$env{'user.domain'},
 3800: 				   $env{'request.course.id'});
 3801: 
 3802: # Get output from resource
 3803:       my $usersaw=&resource_output($feedurl);
 3804: 
 3805: # Get resource answer (need to allow student to view grades for this to work)
 3806:       &Apache::lonnet::appenv(('allowed.vgr'=>'F'));
 3807:       my $useranswer=&Apache::loncommon::get_student_answers(
 3808:                                    $symb,$env{'user.name'},$env{'user.domain'},
 3809: 		                   $env{'request.course.id'});
 3810:       &Apache::lonnet::delenv('allowed.vgr');
 3811: # Get attachments, if any, and not too large
 3812:       my $attachmenturl='';
 3813:       if (($env{'form.origpage'}) || ($env{'form.editdisc'}) ||
 3814: 	  ($env{'form.replydisc'})) {
 3815: 	  my ($symb,$idx);
 3816: 	  if ($env{'form.replydisc'}) {
 3817: 	      ($symb,$idx)=split(/\:\:\:/,$env{'form.replydisc'});
 3818: 	  } elsif ($env{'form.editdisc'}) {
 3819: 	      ($symb,$idx)=split(/\:\:\:/,$env{'form.editdisc'});
 3820: 	  } elsif ($env{'form.origpage'}) {
 3821: 	      $symb = $env{'form.symb'};
 3822: 	  }
 3823: 	  &Apache::lonenc::check_decrypt(\$symb);
 3824: 	  my @currnewattach = ();
 3825: 	  my @deloldattach = ();
 3826: 	  my @keepold = ();
 3827: 	  &process_attachments(\@currnewattach,\@deloldattach,\@keepold);
 3828: 	  $symb=~s|(bulletin___\d+___)adm/wrapper/|$1|;
 3829: 	  $attachmenturl=&construct_attachmenturl(\@currnewattach,\@keepold,$symb,$idx);
 3830:       } elsif ($env{'form.attachment.filename'}) {
 3831: 	  unless (length($env{'form.attachment'})>131072) {
 3832: 	      $attachmenturl=&Apache::lonnet::userfileupload('attachment',undef,'feedback');
 3833: 	  }
 3834:       }
 3835: # Filter HTML out of message (could be nasty)
 3836:       my $message=&clear_out_html($env{'form.comment'});
 3837: 
 3838: # Assemble email
 3839:       my ($email,$citations)=&assemble_email($feedurl,$message,$prevattempts,
 3840: 					     $usersaw,$useranswer);
 3841:  
 3842: # Who gets this?
 3843:       my ($typestyle,%to) = &decide_receiver($feedurl);
 3844: 
 3845: # Actually send mail
 3846:       my ($status,$numsent)=&send_msg(&clear_out_html($env{'form.subject'},
 3847: 						      undef,1),
 3848: 				      $feedurl,$email,$citations,
 3849: 				      $attachmenturl,%to);
 3850: 
 3851: # Discussion? Store that.
 3852:       my $numpost=0;
 3853:       if (  ($env{'form.discuss'} ne ''
 3854: 	     && $env{'form.discuss'} !~ /^(?:author|question|course|policy)/)
 3855: 	   || $env{'form.anondiscuss'} ne '') {
 3856: 	  my $subject = &clear_out_html($env{'form.subject'},undef,1);
 3857: 	  my $anonmode=($env{'form.discuss'} eq 'anon' || $env{'form.anondiscuss'} );
 3858: 	  $typestyle.=&adddiscuss($symb,$message,$anonmode,$attachmenturl,
 3859: 				  $subject);
 3860: 	  $numpost++;
 3861:       }
 3862: 
 3863: # Add to blog?
 3864: 
 3865:       my $blog='';
 3866:       if ($env{'form.blog'}) {
 3867: 	  my $subject = &clear_out_html($env{'form.subject'},undef,1);
 3868: 	  $status.=&Apache::lonrss::addentry($env{'user.name'},
 3869: 				    $env{'user.domain'},
 3870: 				    'CourseBlog_'.$env{'request.course.id'},
 3871: 				    $subject,$message,$feedurl,'public');
 3872: 	  $blog='<br />'.&mt('Added to my course blog').'<br />';
 3873:       }
 3874: 	  
 3875: # Receipt screen and redirect back to where came from
 3876:       &redirect_back($r,$feedurl,$typestyle,$numsent,$numpost,$blog,$status,$env{'form.previous'},undef,undef,undef,undef,undef,undef,$group);
 3877:   }
 3878:   return OK;
 3879: }
 3880: 
 3881: sub blocked_reply_or_edit {
 3882:     my ($blocktext) = @_;
 3883:     return 
 3884:       &Apache::loncommon::start_page('Resource Feedback and Discussion').
 3885:       $blocktext.'<br /><br /><a href="javascript:history.go(-1)">'.
 3886:       &mt('Back to previous page').
 3887:       &Apache::loncommon::end_page();
 3888: } 
 3889: 
 3890: sub wrap_symb {
 3891:     my ($ressymb)=@_;
 3892:     if ($ressymb =~ /bulletin___\d+___/) {
 3893:         unless ($ressymb =~ m|bulletin___\d+___adm/wrapper|) {
 3894:             $ressymb=~s|(bulletin___\d+___)|$1adm/wrapper|;
 3895:         }
 3896:     }
 3897:     return $ressymb;
 3898: }
 3899: sub dewrapper {
 3900:     my ($feedurl)=@_;
 3901:     if ($$feedurl=~m|^/adm/wrapper/adm/.*/bulletinboard$|) {
 3902:         $$feedurl=~s|^/adm/wrapper||;
 3903:     }
 3904: }
 3905: 
 3906: sub get_feedurl {
 3907:     my ($symb)=@_;
 3908:     my ($map,$ind,$url)=&Apache::lonnet::decode_symb($symb);
 3909:     my $feedurl = &Apache::lonnet::clutter($url);
 3910:     &dewrapper(\$feedurl);
 3911:     return $feedurl;
 3912: }
 3913: 
 3914: sub get_feedurl_and_clean_symb {
 3915:     my ($symb)=@_;
 3916:     &Apache::lonenc::check_decrypt(\$symb);
 3917: # backward compatibility (bulletin boards used to be 'wrapped')
 3918:     unless ($symb =~ m|bulletin___\d+___adm/wrapper|) {
 3919: 	$symb=~s|(bulletin___\d+___)|$1adm/wrapper|;
 3920:     }
 3921:     my $feedurl = &get_feedurl($symb);
 3922:     return ($symb,$feedurl);
 3923: }
 3924: 
 3925: sub editing_allowed {
 3926:     my ($postid,$group) = @_;
 3927:     $postid = &unescape($postid);
 3928:     my $can_edit = 0;
 3929:     if ($group ne '') {
 3930:         my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
 3931:         my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
 3932:         if ($postid =~ m|^bulletin___\d+___adm/wrapper(/adm/\Q$cdom\E/\Q$cnum\E/\d+/bulletinboard)|) {
 3933:             if (&check_group_priv($group,'egp') eq 'ok') {
 3934:                 $can_edit = 1;
 3935:             }
 3936:             return $can_edit;
 3937:         }     
 3938:     } 
 3939:     my $cid = $env{'request.course.id'};
 3940:     my $role = (split(/\./,$env{'request.role'}))[0];
 3941:     my $section = $env{'request.course.sec'};
 3942:     my $allow_editing_config = 
 3943: 	$env{'course.'.$cid.'.allow_discussion_post_editing'};
 3944:     if ($allow_editing_config =~ m/^\s*yes\s*$/i) {
 3945:         $can_edit = 1;
 3946:     } else {
 3947: 	foreach my $editor (split(/,/,$allow_editing_config)) {
 3948: 	    my ($editor_role,$editor_sec) = split(/:/,$editor);
 3949: 	    if ($editor_role eq $role
 3950: 		&& defined($editor_sec)
 3951: 		&& defined($section)
 3952: 		&& $editor_sec eq $section) {
 3953: 		$can_edit = 1;
 3954: 		last;
 3955: 	    }
 3956: 	    if ($editor_role eq $role
 3957: 		&& !defined($editor_sec)) {
 3958: 		$can_edit = 1;
 3959: 	    }
 3960: 	}
 3961:     }
 3962:     return $can_edit;
 3963: }
 3964: 
 3965: sub check_group_priv {
 3966:     my ($group,$grp_priv) = @_;
 3967:     foreach my $priv ('mdg','vcg') {
 3968:         my $checkcourse = $env{'request.course.id'}.
 3969:             ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:'');
 3970:         if (&Apache::lonnet::allowed($priv,$checkcourse)) {
 3971:             return 'ok';
 3972:         }
 3973:     }
 3974:     if ($grp_priv && $group ne '') {
 3975:         if (&Apache::lonnet::allowed($grp_priv,$env{'request.course.id'}.'/'.$group)) {
 3976:             return 'ok';
 3977:         }
 3978:     }
 3979:     return '';
 3980: }
 3981: 
 3982: sub group_args { 
 3983:     my ($group) = @_;
 3984:     if ($group eq '') { return ''; }
 3985:     my $extra_args = '&amp;group='.$group;
 3986:     if (exists($env{'form.ref'})) {
 3987:         $extra_args .= '&amp;ref='.$env{'form.ref'};
 3988:     }
 3989:     return $extra_args;
 3990: }
 3991: 
 3992: 1;
 3993: __END__

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