File:  [LON-CAPA] / loncom / interface / lonmsg.pm
Revision 1.206: download - view: text, annotated - select for diffs
Tue May 8 17:23:10 2007 UTC (17 years, 1 month ago) by raeburn
Branches: MAIN
CVS tags: HEAD
Bugs 4647 and 5164
- User can set option for HTML tags to be included in message excerpt sent in notification emails. Default is strip HTML.
- Interface changed for setting of notification email addresses - now set each address to receive all, critical only or non-critical only.
- javascript checks notification e-mail address to see if it is a valid format.
- Internationalization was missing in some places.

    1: # The LearningOnline Network with CAPA
    2: # Routines for messaging
    3: #
    4: # $Id: lonmsg.pm,v 1.206 2007/05/08 17:23:10 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: package Apache::lonmsg;
   30: 
   31: =pod
   32: 
   33: =head1 NAME
   34: 
   35: Apache::lonmsg: supports internal messaging
   36: 
   37: =head1 SYNOPSIS
   38: 
   39: lonmsg provides routines for sending messages.
   40: 
   41: Right now, this document will cover just how to send a message, since
   42: it is likely you will not need to programmatically read messages,
   43: since lonmsg already implements that functionality.
   44: 
   45: The routines used to package messages and unpackage messages are not
   46: only used by lonmsg when creating/extracting messages for LON-CAPA's
   47: internal messaging system, but also by lonnotify.pm which is available
   48: for use by Domain Coordinators to broadcast standard e-mail to specified
   49: users in their domain.  The XML packaging used in the two cases is very
   50: similar.  The differences are the use of <recuser>$uname</recuser> and
   51: <recdomain>$udom</recdomain> in stored internal messages, compared
   52: with <recipient username="$uname:$udom">$email</recipient> in stored
   53: Domain Coordinator e-mail for the storage of information about
   54: recipients of the message/e-mail.
   55: 
   56: =head1 FUNCTIONS
   57: 
   58: =over 4
   59: 
   60: =cut
   61: 
   62: use strict;
   63: use Apache::lonnet;
   64: use HTML::TokeParser();
   65: use Apache::lonlocal;
   66: use Mail::Send;
   67: use LONCAPA qw(:DEFAULT :match);
   68: 
   69: {
   70:     my $uniq;
   71:     sub get_uniq {
   72: 	$uniq++;
   73: 	return $uniq;
   74:     }
   75: }
   76: 
   77: # ===================================================================== Package
   78: 
   79: sub packagemsg {
   80:     my ($subject,$message,$citation,$baseurl,$attachmenturl,
   81: 	$recuser,$recdomain,$msgid,$type,$crsmsgid,$symb,$error,$recipid)=@_;
   82:     $message =&HTML::Entities::encode($message,'<>&"');
   83:     $citation=&HTML::Entities::encode($citation,'<>&"');
   84:     $subject =&HTML::Entities::encode($subject,'<>&"');
   85:     #remove machine specification
   86:     $baseurl =~ s|^http://[^/]+/|/|;
   87:     $baseurl =&HTML::Entities::encode($baseurl,'<>&"');
   88:     #remove machine specification
   89:     $attachmenturl =~ s|^http://[^/]+/|/|;
   90:     $attachmenturl =&HTML::Entities::encode($attachmenturl,'<>&"');
   91:     my $course_context = &get_course_context();
   92:     my $now=time;
   93:     my $msgcount = &get_uniq();
   94:     unless(defined($msgid)) {
   95:         $msgid = &buildmsgid($now,$subject,$env{'user.name'},$env{'user.domain'},
   96:                            $msgcount,$course_context,$symb,$error,$$);
   97:     }
   98:     my $result = '<sendername>'.$env{'user.name'}.'</sendername>'.
   99:            '<senderdomain>'.$env{'user.domain'}.'</senderdomain>'.
  100:            '<subject>'.$subject.'</subject>'.
  101:            '<time>'.&Apache::lonlocal::locallocaltime($now).'</time>';
  102:     if (defined($crsmsgid)) {
  103:         $result.= '<courseid>'.$course_context.'</courseid>'.
  104:                   '<coursesec>'.$env{'request.course.sec'}.'</coursesec>'.
  105:                   '<msgid>'.$msgid.'</msgid>'.
  106:                   '<coursemsgid>'.$crsmsgid.'</coursemsgid>'.
  107:                   '<message>'.$message.'</message>';
  108:         return ($msgid,$result);
  109:     }
  110:     $result .= '<servername>'.$ENV{'SERVER_NAME'}.'</servername>'.
  111:            '<host>'.$ENV{'HTTP_HOST'}.'</host>'.
  112: 	   '<client>'.$ENV{'REMOTE_ADDR'}.'</client>'.
  113: 	   '<browsertype>'.$env{'browser.type'}.'</browsertype>'.
  114: 	   '<browseros>'.$env{'browser.os'}.'</browseros>'.
  115: 	   '<browserversion>'.$env{'browser.version'}.'</browserversion>'.
  116:            '<browsermathml>'.$env{'browser.mathml'}.'</browsermathml>'.
  117: 	   '<browserraw>'.$ENV{'HTTP_USER_AGENT'}.'</browserraw>'.
  118: 	   '<courseid>'.$course_context.'</courseid>'.
  119: 	   '<coursesec>'.$env{'request.course.sec'}.'</coursesec>'.
  120: 	   '<role>'.$env{'request.role'}.'</role>'.
  121: 	   '<resource>'.$env{'request.filename'}.'</resource>'.
  122:            '<msgid>'.$msgid.'</msgid>';
  123:     if (ref($recuser) eq 'ARRAY') {
  124:         for (my $i=0; $i<@{$recuser}; $i++) {
  125:             if ($type eq 'dcmail') {
  126:                 my ($username,$email) = split(/:/,$$recuser[$i]);
  127:                 $username = &unescape($username);
  128:                 $email = &unescape($email);
  129:                 $username = &HTML::Entities::encode($username,'<>&"');
  130:                 $email = &HTML::Entities::encode($email,'<>&"');
  131:                 $result .= '<recipient username="'.$username.'">'.
  132:                                             $email.'</recipient>';
  133:             } else {
  134:                 $result .= '<recuser>'.$$recuser[$i].'</recuser>'.
  135:                            '<recdomain>'.$$recdomain[$i].'</recdomain>';
  136:             }
  137:         }
  138:     } else {
  139:         $result .= '<recuser>'.$recuser.'</recuser>'.
  140:                    '<recdomain>'.$recdomain.'</recdomain>';
  141:     }
  142:     $result .= '<message>'.$message.'</message>';
  143:     if (defined($citation)) {
  144: 	$result.='<citation>'.$citation.'</citation>';
  145:     }
  146:     if (defined($baseurl)) {
  147: 	$result.= '<baseurl>'.$baseurl.'</baseurl>';
  148:     }
  149:     if (defined($attachmenturl)) {
  150: 	$result.= '<attachmenturl>'.$attachmenturl.'</attachmenturl>';
  151:     }
  152:     if (defined($symb)) {
  153:         $result.= '<symb>'.$symb.'</symb>';
  154:         if ($course_context ne '') {
  155:             if ($course_context eq $env{'request.course.id'}) {
  156:                 my $resource_title = &Apache::lonnet::gettitle($symb);
  157:                 if (defined($resource_title)) {
  158:                     $result .= '<resource_title>'.$resource_title.'</resource_title>';
  159:                 }
  160:             }
  161:         }
  162:     }
  163:     if (defined($recipid)) {
  164:         $result.= '<recipid>'.$recipid.'</recipid>';
  165:     }
  166:     if ($env{'form.can_reply'} eq 'N') {
  167:         $result .= '<noreplies>1</noreplies>';
  168:     }
  169:     if ($env{'form.reply_to_addr'}) {
  170:         my ($replytoname,$replytodom) = split(/:/,$env{'form.reply_to_addr'});
  171:         if (!($replytoname eq $env{'user.name'} && $replytodom eq $env{'user.domain'})) {
  172:             if (&Apache::lonnet::homeserver($replytoname,$replytodom) ne 'no_host') {
  173:                 $result .= '<replytoaddr>'.$env{'form.reply_to_addr'}.'</replytoaddr>';
  174:             }
  175:         }
  176:     }
  177:     return ($msgid,$result);
  178: }
  179: 
  180: sub get_course_context {
  181:     my $course_context;
  182:     if (defined($env{'form.replyid'})) {
  183:         my ($sendtime,$shortsubj,$fromname,$fromdomain,$count,$origcid)=
  184:                    split(/\:/,&unescape($env{'form.replyid'}));
  185:         $course_context = $origcid;
  186:     }
  187:     foreach my $key (keys(%env)) {
  188:         if ($key=~/^form\.(rep)?rec\_(.*)$/) {
  189:             my ($sendtime,$shortsubj,$fromname,$fromdomain,$count,$origcid) =
  190:                                     split(/\:/,&unescape($2));
  191:             $course_context = $origcid;
  192:             last;
  193:         }
  194:     }
  195:     if ($course_context eq '') {
  196:         $course_context = $env{'request.course.id'};
  197:     }
  198:     return $course_context;
  199: }
  200: 
  201: # ================================================== Unpack message into a hash
  202: 
  203: sub unpackagemsg {
  204:     my ($message,$notoken)=@_;
  205:     my %content=();
  206:     my $parser=HTML::TokeParser->new(\$message);
  207:     my $token;
  208:     while ($token=$parser->get_token) {
  209:        if ($token->[0] eq 'S') {
  210: 	   my $entry=$token->[1];
  211:            my $value=$parser->get_text('/'.$entry);
  212:            if (($entry eq 'recuser') || ($entry eq 'recdomain')) {
  213:                push(@{$content{$entry}},$value);
  214:            } elsif ($entry eq 'recipient') {
  215:                my $username = $token->[2]{'username'};
  216:                $username = &HTML::Entities::decode($username,'<>&"');
  217:                $content{$entry}{$username} = $value;
  218:            } else {
  219:                $content{$entry}=$value;
  220:            }
  221:        }
  222:     }
  223:     if (!exists($content{'recuser'})) { $content{'recuser'} = []; }
  224:     if ($content{'attachmenturl'}) {
  225:        my ($fname)=($content{'attachmenturl'}=~m|/([^/]+)$|);
  226:        if ($notoken) {
  227: 	   $content{'message'}.='<p>'.&mt('Attachment').': <tt>'.$fname.'</tt>';
  228:        } else {
  229: 	   &Apache::lonnet::allowuploaded('/adm/msg',
  230: 					  $content{'attachmenturl'});
  231: 	   $content{'message'}.='<p>'.&mt('Attachment').
  232: 	       ': <a href="'.$content{'attachmenturl'}.'"><tt>'.
  233: 	       $fname.'</tt></a>';
  234:        }
  235:     }
  236:     return %content;
  237: }
  238: 
  239: # ======================================================= Get info out of msgid
  240: 
  241: sub buildmsgid {
  242:     my ($now,$subject,$uname,$udom,$msgcount,$course_context,$symb,$error,$pid) = @_;
  243:     $subject=&escape($subject);
  244:     $symb = &escape($symb);
  245:     return(&escape($now.':'.$subject.':'.$uname.':'.
  246:            $udom.':'.$msgcount.':'.$course_context.':'.$pid.':'.$symb.':'.$error));
  247: }
  248: 
  249: sub unpackmsgid {
  250:     my ($msgid,$folder,$skipstatus,$status_cache)=@_;
  251:     $msgid=&unescape($msgid);
  252:     my ($sendtime,$shortsubj,$fromname,$fromdomain,$count,$fromcid,
  253:         $processid,$symb,$error) = split(/\:/,&unescape($msgid));
  254:     $shortsubj = &unescape($shortsubj);
  255:     $shortsubj = &HTML::Entities::decode($shortsubj);
  256:     $symb = &unescape($symb);
  257:     if (!defined($processid)) { $fromcid = ''; }
  258:     my %status=();
  259:     unless ($skipstatus) {
  260: 	if (ref($status_cache)) {
  261: 	    $status{$msgid} = $status_cache->{$msgid};
  262: 	} else {
  263: 	    my $suffix=&foldersuffix($folder);
  264: 	    %status=&Apache::lonnet::get('email_status'.$suffix,[$msgid]);
  265: 	}
  266: 	if ($status{$msgid}=~/^error\:/) { $status{$msgid}=''; }
  267:         unless ($status{$msgid}) { $status{$msgid}='new'; }
  268:     }
  269:     return ($sendtime,$shortsubj,$fromname,$fromdomain,$status{$msgid},$fromcid,$symb,$error);
  270: }
  271: 
  272: 
  273: sub sendemail {
  274:     my ($to,$subject,$body)=@_;
  275:     my %senderemails=&Apache::loncommon::getemails();
  276:     my $senderaddress='';
  277:     foreach my $type ('notification','permanentemail','critnotification') {
  278: 	if ($senderemails{$type}) {
  279: 	    $senderaddress=$senderemails{$type};
  280: 	}
  281:     }
  282:     $body=
  283:     "*** ".&mt('This is an automatic message generated by the LON-CAPA system.')."\n".
  284:     "*** ".($senderaddress?&mt('You can reply to this message'):&mt('Please do not reply to this address.')."\n*** ".
  285: 	    &mt('A reply will not be received by the recipient!'))."\n\n".$body;
  286:     my $msg = new Mail::Send;
  287:     $msg->to($to);
  288:     $msg->subject('[LON-CAPA] '.$subject);
  289:     if ($senderaddress) { $msg->add('Reply-to',$senderaddress); $msg->add('From',$senderaddress); }
  290:     if (my $fh = $msg->open()) {
  291: 	print $fh $body;
  292: 	$fh->close;
  293:     }
  294: }
  295: 
  296: # ==================================================== Send notification emails
  297: 
  298: sub sendnotification {
  299:     my ($to,$touname,$toudom,$subj,$crit,$text,$msgid)=@_;
  300:     my $sender=$env{'environment.firstname'}.' '.$env{'environment.lastname'};
  301:     unless ($sender=~/\w/) { 
  302: 	$sender=$env{'user.name'}.'@'.$env{'user.domain'};
  303:     }
  304:     my $critical=($crit?' critical':'');
  305:     $text=~s/\&lt\;/\</gs;
  306:     $text=~s/\&gt\;/\>/gs;
  307:     my $url='http://'.
  308: 	&Apache::lonnet::hostname(&Apache::lonnet::homeserver($touname,$toudom)).
  309:       '/adm/email?username='.$touname.'&domain='.$toudom;
  310:     my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid,
  311:         $symb,$error) = &Apache::lonmsg::unpackmsgid($msgid);
  312:     my ($coursetext,$body,$bodystart,$bodyend);
  313:     if ($fromcid ne '') {
  314:         $coursetext = "\n".&mt('Course').': ';
  315:         if ($env{'course.'.$fromcid.'.description'} ne '') {
  316:             $coursetext .= $env{'course.'.$fromcid.'.description'};
  317:         } else {
  318:             my %coursehash = &Apache::lonnet::coursedescription($fromcid,);
  319:             if ($coursehash{'description'} ne '') {
  320:                 $coursetext .= $coursehash{'description'};
  321:             }
  322:         }
  323:         $coursetext .= "\n\n";
  324:     }
  325:     my @recipients = split(/,/,$to);
  326:     $bodystart = $coursetext. 
  327:                &mt('You received a'.$critical.' message from [_1] in LON-CAPA.',$sender).' '.&mt('The subject is 
  328: 
  329:  [_1]
  330: 
  331: ',$subj)."\n".
  332: '=== '.&mt('Excerpt')." ============================================================
  333: ";
  334:     $bodyend = "
  335: ========================================================================
  336: 
  337: ".&mt('Use 
  338: 
  339:  [_1]
  340: 
  341: to access the full message.',$url);
  342:     my %userenv = &Apache::lonnet::get('environment',['notifywithhtml'],$toudom,$touname);
  343:     my $subject = &mt("'New' $critical message from ").$sender;
  344:     if ($userenv{'notifywithhtml'} ne '') {
  345:         my @htmlexcerpt = split(/,/,$userenv{'notifywithhtml'});
  346:         foreach my $addr (@recipients) {
  347:             my $sendtext = $text;
  348:             if (!grep/^\Q$addr\E/,@htmlexcerpt) {
  349:                 $sendtext =~ s/\<\/*[^\>]+\>//gs;
  350:             }
  351:             $body = $bodystart.$sendtext.$bodyend;
  352:             &sendemail($addr,$subject,$body);
  353:         }
  354:     } else {
  355:         $body = $bodystart.$text.$bodyend;
  356:         $text =~ s/\<\/*[^\>]+\>//gs;
  357:         &sendemail($to,$subject,$body);
  358:     }
  359: }
  360: # ============================================================= Check for email
  361: 
  362: sub newmail {
  363:     if ((time-$env{'user.mailcheck.time'})>300) {
  364:         my %what=&Apache::lonnet::get('email_status',['recnewemail']);
  365:         &Apache::lonnet::appenv('user.mailcheck.time'=>time);
  366:         if ($what{'recnewemail'}>0) { return 1; }
  367:     }
  368:     return 0;
  369: }
  370: 
  371: # =============================== Automated message to the author of a resource
  372: 
  373: =pod
  374: 
  375: =item * B<author_res_msg($filename, $message)>: Sends message $message to the owner
  376:     of the resource with the URI $filename.
  377: 
  378: =cut
  379: 
  380: sub author_res_msg {
  381:     my ($filename,$message)=@_;
  382:     unless ($message) { return 'empty'; }
  383:     $filename=&Apache::lonnet::declutter($filename);
  384:     my ($domain,$author,@dummy)=split(/\//,$filename);
  385:     my $homeserver=&Apache::lonnet::homeserver($author,$domain);
  386:     if ($homeserver ne 'no_host') {
  387:        my $id=unpack("%32C*",$message);
  388:        $message .= " <p>This error occurred on machine ".
  389: 	   $Apache::lonnet::perlvar{'lonHostID'}."</p>";
  390:        my $msgid;
  391:        ($msgid,$message)=&packagemsg($filename,$message);
  392:        return &Apache::lonnet::reply('put:'.$domain.':'.$author.
  393:          ':nohist_res_msgs:'.
  394:           &escape($filename.'_'.$id).'='.
  395:           &escape($message),$homeserver);
  396:     }
  397:     return 'no_host';
  398: }
  399: 
  400: # =========================================== Retrieve author resource messages
  401: 
  402: sub retrieve_author_res_msg {
  403:     my $url=shift;
  404:     $url=&Apache::lonnet::declutter($url);
  405:     my ($domain,$author)=($url=~/^($match_domain)\/($match_username)\//);
  406:     my %errormsgs=&Apache::lonnet::dump('nohist_res_msgs',$domain,$author);
  407:     my $msgs='';
  408:     foreach (keys %errormsgs) {
  409: 	if ($_=~/^\Q$url\E\_\d+$/) {
  410: 	    my %content=&unpackagemsg($errormsgs{$_});
  411: 	    $msgs.='<p><img src="/adm/lonMisc/bomb.gif" /><b>'.
  412: 		$content{'time'}.'</b>: '.$content{'message'}.
  413: 		'<br /></p>';
  414: 	}
  415:     } 
  416:     return $msgs;     
  417: }
  418: 
  419: 
  420: # =============================== Delete all author messages related to one URL
  421: 
  422: sub del_url_author_res_msg {
  423:     my $url=shift;
  424:     $url=&Apache::lonnet::declutter($url);
  425:     my ($domain,$author)=($url=~/^($match_domain)\/($match_username)\//);
  426:     my @delmsgs=();
  427:     foreach (&Apache::lonnet::getkeys('nohist_res_msgs',$domain,$author)) {
  428: 	if ($_=~/^\Q$url\E\_\d+$/) {
  429: 	    push (@delmsgs,$_);
  430: 	}
  431:     }
  432:     return &Apache::lonnet::del('nohist_res_msgs',\@delmsgs,$domain,$author);
  433: }
  434: # =================================== Clear out all author messages in URL path
  435: 
  436: sub clear_author_res_msg {
  437:     my $url=shift;
  438:     $url=&Apache::lonnet::declutter($url);
  439:     my ($domain,$author)=($url=~/^($match_domain)\/($match_username)\//);
  440:     my @delmsgs=();
  441:     foreach (&Apache::lonnet::getkeys('nohist_res_msgs',$domain,$author)) {
  442: 	if ($_=~/^\Q$url\E/) {
  443: 	    push (@delmsgs,$_);
  444: 	}
  445:     }
  446:     return &Apache::lonnet::del('nohist_res_msgs',\@delmsgs,$domain,$author);
  447: }
  448: # ================= Return hash with URLs for which there is a resource message
  449: 
  450: sub all_url_author_res_msg {
  451:     my ($author,$domain)=@_;
  452:     my %returnhash=();
  453:     foreach (&Apache::lonnet::getkeys('nohist_res_msgs',$domain,$author)) {
  454: 	$_=~/^(.+)\_\d+/;
  455: 	$returnhash{$1}=1;
  456:     }
  457:     return %returnhash;
  458: }
  459: 
  460: # ====================================== Add a comment to the User Notes screen
  461: 
  462: sub store_instructor_comment {
  463:     my ($msg,$uname,$udom) = @_;
  464:     my $cid  = $env{'request.course.id'};
  465:     my $cnum = $env{'course.'.$cid.'.num'};
  466:     my $cdom = $env{'course.'.$cid.'.domain'};
  467:     my $subject= &mt('Record').' ['.$uname.':'.$udom.']';
  468:     my $result = &user_normal_msg_raw($cnum,$cdom,$subject,$msg);
  469:     if ($result eq 'ok' || $result eq 'con_delayed') {
  470:         
  471:     }
  472:     return $result;
  473: }
  474: 
  475: # ================================================== Critical message to a user
  476: 
  477: sub user_crit_msg_raw {
  478:     my ($user,$domain,$subject,$message,$sendback,$toperm,$sentmessage,
  479:         $nosentstore,$recipid)=@_;
  480: # Check if allowed missing
  481:     my ($status,$packed_message);
  482:     my $msgid='undefined';
  483:     unless (($message)&&($user)&&($domain)) { $status='empty'; };
  484:     my $text=$message;
  485:     my $homeserver=&Apache::lonnet::homeserver($user,$domain);
  486:     if ($homeserver ne 'no_host') {
  487:        ($msgid,$packed_message)=&packagemsg($subject,$message,undef,undef,
  488:                                   undef,undef,undef,undef,undef,undef,undef,
  489:                                   undef,$recipid);
  490:        if ($sendback) { $packed_message.='<sendback>true</sendback>'; }
  491:        $status=&Apache::lonnet::critical(
  492:            'put:'.$domain.':'.$user.':critical:'.
  493:            &escape($msgid).'='.
  494:            &escape($packed_message),$homeserver);
  495:         if (defined($sentmessage)) {
  496:             $$sentmessage = $packed_message;
  497:         }
  498:         if (!$nosentstore) {
  499:             (undef,my $packed_message_no_citation) =
  500:             &packagemsg($subject,$message,undef,undef,undef,$user,$domain,
  501:                         $msgid);
  502:             if ($status eq 'ok' || $status eq 'con_delayed') {
  503:                 &store_sent_mail($msgid,$packed_message_no_citation);
  504:             }
  505:         }
  506:     } else {
  507:        $status='no_host';
  508:     }
  509: 
  510: # Notifications
  511:     my %userenv = &Apache::loncommon::getemails($user,$domain);
  512:     if ($userenv{'critnotification'}) {
  513:       &sendnotification($userenv{'critnotification'},$user,$domain,$subject,1,
  514: 			$text,$msgid);
  515:     }
  516:     if ($toperm && $userenv{'permanentemail'}) {
  517:       &sendnotification($userenv{'permanentemail'},$user,$domain,$subject,1,
  518: 			$text,$msgid);
  519:     }
  520: # Log this
  521:     &Apache::lonnet::logthis(
  522:       'Sending critical email '.$msgid.
  523:       ', log status: '.
  524:       &Apache::lonnet::log($env{'user.domain'},$env{'user.name'},
  525:                          $env{'user.home'},
  526:       'Sending critical '.$msgid.' to '.$user.' at '.$domain.' with status: '
  527:       .$status));
  528:     return $status;
  529: }
  530: 
  531: # New routine that respects "forward" and calls old routine
  532: 
  533: =pod
  534: 
  535: =item * B<user_crit_msg($user, $domain, $subject, $message, $sendback, $nosentstore,$recipid)>: 
  536:     Sends a critical message $message to the $user at $domain.  If $sendback
  537:     is true,  a receipt will be sent to the current user when $user receives 
  538:     the message.
  539: 
  540:     Additionally it will check if the user has a Forwarding address
  541:     set, and send the message to that address instead
  542: 
  543:     returns 
  544:       - in array context a list of results for each message that was sent
  545:       - in scalar context a space seperated list of results for each 
  546:            message sent
  547: 
  548: =cut
  549: 
  550: sub user_crit_msg {
  551:     my ($user,$domain,$subject,$message,$sendback,$toperm,$sentmessage,
  552:         $nosentstore,$recipid)=@_;
  553:     my @status;
  554:     my %userenv = &Apache::lonnet::get('environment',['msgforward'],
  555:                                        $domain,$user);
  556:     my $msgforward=$userenv{'msgforward'};
  557:     if ($msgforward) {
  558:        foreach my $addr (split(/\,/,$msgforward)) {
  559: 	 my ($forwuser,$forwdomain)=split(/\:/,$addr);
  560:          push(@status,
  561: 	      &user_crit_msg_raw($forwuser,$forwdomain,$subject,$message,
  562: 				 $sendback,$toperm,$sentmessage,$nosentstore,
  563:                                  $recipid));
  564:        }
  565:     } else { 
  566: 	push(@status,
  567: 	     &user_crit_msg_raw($user,$domain,$subject,$message,$sendback,
  568: 				$toperm,$sentmessage,$nosentstore,$recipid));
  569:     }
  570:     if (wantarray) {
  571: 	return @status;
  572:     }
  573:     return join(' ',@status);
  574: }
  575: 
  576: # =================================================== Critical message received
  577: 
  578: sub user_crit_received {
  579:     my $msgid=shift;
  580:     my %message=&Apache::lonnet::get('critical',[$msgid]);
  581:     my %contents=&unpackagemsg($message{$msgid},1);
  582:     my $destname = $contents{'sendername'};
  583:     my $destdom = $contents{'senderdomain'};
  584:     if ($contents{'replytoaddr'}) {
  585:         my ($repname,$repdom) = split(/:/,$contents{'replytoaddr'});
  586:         if (&Apache::lonnet::homeserver($repname,$repdom) ne 'no_host') {
  587:             $destname = $repname;
  588:             $destdom = $repdom;    
  589:         }
  590:     }
  591:     my $status='rec: '.($contents{'sendback'}?
  592:      &user_normal_msg($destname,$destdom,&mt('Receipt').': '.$env{'user.name'}.
  593:                       ' '.&mt('at').' '.$env{'user.domain'}.', '.
  594:                       $contents{'subject'},&mt('User').' '.$env{'user.name'}.
  595:                       ' '.&mt('at').' '.$env{'user.domain'}.
  596:                       ' acknowledged receipt of message'."\n".'   "'.
  597:                       $contents{'subject'}.'"'."\n".&mt('dated').' '.
  598:                       $contents{'time'}.".\n"
  599:                       ):'no msg req');
  600:     $status.=' trans: '.
  601:      &Apache::lonnet::put(
  602:      'nohist_email',{$contents{'msgid'} => $message{$msgid}});
  603:     $status.=' del: '.
  604:      &Apache::lonnet::del('critical',[$contents{'msgid'}]);
  605:     &Apache::lonnet::log($env{'user.domain'},$env{'user.name'},
  606:                          $env{'user.home'},'Received critical message '.
  607:                          $contents{'msgid'}.
  608:                          ', '.$status);
  609:     return $status;
  610: }
  611: 
  612: # ======================================================== Normal communication
  613: 
  614: sub user_normal_msg_raw {
  615:     my ($user,$domain,$subject,$message,$citation,$baseurl,$attachmenturl,
  616:         $toperm,$currid,$newid,$sentmessage,$crsmsgid,$symb,$restitle,
  617:         $error,$nosentstore,$recipid)=@_;
  618: # Check if allowed missing
  619:     my ($status,$packed_message);
  620:     my $msgid='undefined';
  621:     my $text=$message;
  622:     unless (($message)&&($user)&&($domain)) { $status='empty'; };
  623:     my $homeserver=&Apache::lonnet::homeserver($user,$domain);
  624:     if ($homeserver ne 'no_host') {
  625:        ($msgid,$packed_message)=
  626: 	                 &packagemsg($subject,$message,$citation,$baseurl,
  627:                                      $attachmenturl,$user,$domain,$currid,
  628:                                      undef,$crsmsgid,$symb,$error,$recipid);
  629: 
  630: # Store in user folder
  631:        $status=&Apache::lonnet::critical(
  632:            'put:'.$domain.':'.$user.':nohist_email:'.
  633:            &escape($msgid).'='.
  634:            &escape($packed_message),$homeserver);
  635: # Save new message received time
  636:        &Apache::lonnet::put
  637:                          ('email_status',{'recnewemail'=>time},$domain,$user);
  638: # Into sent-mail folder if sent mail storage required
  639:        if (!$nosentstore) {
  640:            (undef,my $packed_message_no_citation) =
  641:                &packagemsg($subject,$message,undef,$baseurl,$attachmenturl,
  642:                            $user,$domain,$currid,undef,$crsmsgid,$symb,$error);
  643:            if ($status eq 'ok' || $status eq 'con_delayed') {
  644:                &store_sent_mail($msgid,$packed_message_no_citation);
  645:            }
  646:        }
  647:        if (ref($newid) eq 'SCALAR') {
  648: 	   $$newid = $msgid;
  649:        }
  650:        if (ref($sentmessage) eq 'SCALAR') {
  651: 	   $$sentmessage = $packed_message;
  652:        }
  653: # Notifications
  654:        my %userenv = &Apache::loncommon::getemails($user,$domain);
  655:        if ($userenv{'notification'}) {
  656: 	   &sendnotification($userenv{'notification'},$user,$domain,$subject,0,
  657: 			     $text,$msgid);
  658:        }
  659:        if ($toperm && $userenv{'permanentemail'}) {
  660: 	   &sendnotification($userenv{'permanentemail'},$user,$domain,$subject,0,
  661: 			     $text,$msgid);
  662:        }
  663:        &Apache::lonnet::log($env{'user.domain'},$env{'user.name'},
  664: 			    $env{'user.home'},
  665: 			    'Sending '.$msgid.' to '.$user.' at '.$domain.' with status: '.$status);
  666:    } else {
  667:        $status='no_host';
  668:    }
  669:     return $status;
  670: }
  671: 
  672: # New routine that respects "forward" and calls old routine
  673: 
  674: =pod
  675: 
  676: =item * B<user_normal_msg($user, $domain, $subject, $message, $citation,
  677:        $baseurl, $attachmenturl, $toperm, $sentmessage, $symb, $restitle,
  678:        $error,$nosentstore,$recipid)>:
  679:  Sends a message to the  $user at $domain, with subject $subject and message $message.
  680: 
  681:     Additionally it will check if the user has a Forwarding address
  682:     set, and send the message to that address instead
  683: 
  684:     returns
  685:       - in array context a list of results for each message that was sent
  686:       - in scalar context a space seperated list of results for each
  687:            message sent
  688: 
  689: =cut
  690: 
  691: sub user_normal_msg {
  692:     my ($user,$domain,$subject,$message,$citation,$baseurl,$attachmenturl,
  693: 	$toperm,$sentmessage,$symb,$restitle,$error,$nosentstore,$recipid)=@_;
  694:     my @status;
  695:     my %userenv = &Apache::lonnet::get('environment',['msgforward'],
  696:                                        $domain,$user);
  697:     my $msgforward=$userenv{'msgforward'};
  698:     if ($msgforward) {
  699:         foreach (split(/\,/,$msgforward)) {
  700: 	    my ($forwuser,$forwdomain)=split(/\:/,$_);
  701: 	    push(@status,
  702: 	        &user_normal_msg_raw($forwuser,$forwdomain,$subject,$message,
  703: 				     $citation,$baseurl,$attachmenturl,$toperm,
  704: 				     undef,undef,$sentmessage,undef,$symb,
  705:                                      $restitle,$error,$nosentstore,$recipid));
  706:         }
  707:     } else {
  708: 	push(@status,&user_normal_msg_raw($user,$domain,$subject,$message,
  709: 				     $citation,$baseurl,$attachmenturl,$toperm,
  710: 				     undef,undef,$sentmessage,undef,$symb,
  711:                                      $restitle,$error,$nosentstore,$recipid));
  712:     }
  713:     if (wantarray) {
  714:         return @status;
  715:     }
  716:     return join(' ',@status);
  717: }
  718: 
  719: sub process_sent_mail {
  720:     my ($msgsubj,$subj_prefix,$numsent,$stamp,$msgname,$msgdom,$msgcount,$context,$pid,$savemsg,$recusers,$recudoms,$baseurl,$attachmenturl,$symb,$error,$senderuname,$senderdom,$senderhome) = @_;
  721:     my $sentsubj;
  722:     if ($numsent > 1) {
  723:         $sentsubj = $subj_prefix.' ('.$numsent.' sent) '.$msgsubj;
  724:     } else {
  725:         if ($subj_prefix) {
  726:             $sentsubj = $subj_prefix.' ';
  727:         }
  728:         $sentsubj .= $msgsubj;
  729:     }
  730:     $sentsubj = &HTML::Entities::encode($sentsubj,'<>&"');
  731:     my $sentmsgid = 
  732:         &buildmsgid($stamp,$sentsubj,$msgname,$msgdom,$msgcount,$context,$pid);
  733:     (undef,my $sentmessage) =
  734:         &packagemsg($msgsubj,$savemsg,undef,$baseurl,$attachmenturl,$recusers,
  735:                     $recudoms,$sentmsgid,undef,undef,$symb,$error);
  736:     my $status = &store_sent_mail($sentmsgid,$sentmessage,$senderuname,
  737:                                   $senderdom,$senderhome);
  738:     return $status;
  739: }
  740: 
  741: sub store_sent_mail {
  742:     my ($msgid,$message,$senderuname,$senderdom,$senderhome) = @_;
  743:     if ($senderuname eq '') {
  744:         $senderuname = $env{'user.name'};
  745:     }
  746:     if ($senderdom eq '') {
  747:         $senderdom = $env{'user.domain'};
  748:     }
  749:     if ($senderhome eq '') {
  750:         $senderhome = $env{'user.home'};
  751:     }
  752:     my $status =' '.&Apache::lonnet::critical(
  753:                'put:'.$senderdom.':'.$senderuname.':nohist_email_sent:'.
  754:                &escape($msgid).'='.&escape($message),$senderhome);
  755:     return $status;
  756: }
  757: 
  758: sub store_recipients {
  759:     my ($subject,$sendername,$senderdom,$reciphash) = @_;
  760:     my $context = &get_course_context();
  761:     my $now = time();
  762:     my $msgcount = &get_uniq();
  763:     my $recipid =
  764:         &buildmsgid($now,$subject,$sendername,$senderdom,$msgcount,$context,$$);
  765:     my %recipinfo = (
  766:                          $recipid => $reciphash,
  767:                     );
  768:     my $status = &Apache::lonnet::put('nohist_emailrecip',\%recipinfo,
  769:                                       $senderdom,$sendername); 
  770:     if ($status eq 'ok') {
  771:         return ($recipid,$status);
  772:     } else {
  773:         return (undef,$status);
  774:     }
  775: }
  776: 
  777: # =============================================================== Folder suffix
  778: 
  779: sub foldersuffix {
  780:     my $folder=shift;
  781:     unless ($folder) { return ''; }
  782:     my $suffix;
  783:     my %folderhash = &get_user_folders($folder);
  784:     if (ref($folderhash{$folder}) eq 'HASH') {
  785:         $suffix = '_'.&escape($folderhash{$folder}{'id'});
  786:     } else {
  787:         $suffix = '_'.&escape($folder);
  788:     }
  789:     return $suffix;
  790: }
  791: 
  792: # ========================================================= User-defined folders 
  793: 
  794: sub get_user_folders {
  795:     my ($folder) = @_;
  796:     my %userfolders = 
  797:           &Apache::lonnet::dump('email_folders',undef,undef,$folder);
  798:     my $lock = "\0".'lock_counter'; # locks db while counter incremented
  799:     my $counter = "\0".'idcount';   # used in suffix for email db files
  800:     if (defined($userfolders{$lock})) {
  801:         delete($userfolders{$lock});
  802:     }
  803:     if (defined($userfolders{$counter})) {
  804:         delete($userfolders{$counter});
  805:     }
  806:     return %userfolders;
  807: }
  808: 
  809: sub secapply {
  810:     my $rec=shift;
  811:     my $defaultflag=shift;
  812:     $rec=~s/\s+//g;
  813:     $rec=~s/\@/\:/g;
  814:     my ($adr,$sections_or_groups)=($rec=~/^([^\(]+)\(([^\)]+)\)/);
  815:     if ($sections_or_groups) {
  816: 	foreach my $item (split(/\;/,$sections_or_groups)) {
  817:             if (($item eq $env{'request.course.sec'}) ||
  818:                 ($defaultflag && ($item eq '*'))) {
  819:                 return $adr; 
  820:             } elsif ($env{'request.course.groups'}) {
  821:                 my @usersgroups = split(/:/,$env{'request.course.groups'});
  822:                 if (grep(/^\Q$item\E$/,@usersgroups)) {
  823:                     return $adr;
  824:                 }
  825:             } 
  826:         }
  827:     } else {
  828:        return $rec;
  829:     }
  830:     return '';
  831: }
  832: 
  833: =pod 
  834: 
  835: =item * B<decide_receiver($feedurl,$author,$question,$course,$policy,$defaultflag)>:
  836: 
  837: Arguments
  838:   $feedurl - /res/ url of resource (only need if $author is true)
  839:   $author,$question,$course,$policy - all true/false parameters
  840:     if true will attempt to find the addresses of user that should receive
  841:     this type of feedback (author - feedback to author of resource $feedurl,
  842:     $question 'Resource Content Questions', $course 'Course Content Question',
  843:     $policy 'Course Policy')
  844:     (Additionally it also checks $env for whether the corresponding form.<name>
  845:     element exists, for ease of use in a html response context)
  846:    
  847:   $defaultflag - (internal should be left blank) if true gather addresses 
  848:                  that aren't for a section even if I have a section
  849:                  (used for reccursion internally, first we look for
  850:                  addresses for our specific section then we recurse
  851:                  and look for non section addresses)
  852: 
  853: Returns
  854:   $typestyle - string of html text, describing what addresses were found
  855:   %to - a hash, which keys are addresses of users to send messages to
  856:         the keys will look like   name:domain
  857: 
  858: =cut
  859: 
  860: sub decide_receiver {
  861:     my ($feedurl,$author,$question,$course,$policy,$defaultflag) = @_;
  862:     &Apache::lonenc::check_decrypt(\$feedurl);
  863:     my $typestyle='';
  864:     my %to=();
  865:     if ($env{'form.discuss'} eq 'author' ||$author) {
  866: 	$typestyle.='Submitting as Author Feedback<br />';
  867: 	$feedurl=~ m{^/res/($LONCAPA::domain_re)/($LONCAPA::username_re)/};
  868: 	$to{$2.':'.$1}=1;
  869:     }
  870:     my $cid = $env{'request.course.id'};
  871:     if ($env{'form.discuss'} eq 'question' ||$question) {
  872: 	$typestyle.=&mt('Submitting as Question').'<br />';
  873: 	foreach my $item (split(/\,/,$env{'course.'.$cid.'.question.email'})) {
  874: 	    my $rec=&secapply($item,$defaultflag);
  875: 	    if ($rec) { $to{$rec}=1; }
  876: 	} 
  877:     }
  878:     if ($env{'form.discuss'} eq 'course' ||$course) {
  879: 	$typestyle.=&mt('Submitting as Comment').'<br />';
  880: 	foreach my $item (split(/\,/,$env{'course.'.$cid.'.comment.email'})) {
  881: 	    my $rec=&secapply($item,$defaultflag);
  882: 	    if ($rec) { $to{$rec}=1; }
  883: 	} 
  884:     }
  885:     if ($env{'form.discuss'} eq 'policy' ||$policy) {
  886: 	$typestyle.=&mt('Submitting as Policy Feedback').'<br />';
  887: 	foreach my $item (split(/\,/,$env{'course.'.$cid.'.policy.email'})) {
  888: 	    my $rec=&secapply($item,$defaultflag);
  889: 	    if ($rec) { $to{$rec}=1; }
  890: 	} 
  891:     }
  892:     if ((scalar(%to) eq '0') && (!$defaultflag)) {
  893: 	($typestyle,%to)=
  894: 	    &decide_receiver($feedurl,$author,$question,$course,$policy,1);
  895:     }
  896:     return ($typestyle,%to);
  897: }
  898: 
  899: =pod
  900: 
  901: =back
  902: 
  903: =cut
  904: 
  905: 1;
  906: __END__
  907: 

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