# The LearningOnline Network with CAPA
#
# Routines for messaging
#
# (Routines to control the menu
#
# (TeX Conversion Module
#
# 05/29/00,05/30 Gerd Kortemeyer)
#
# 10/05 Gerd Kortemeyer)
#
# 10/19,10/20 Gerd Kortemeyer

package Apache::lonmsg;

use strict;
use Apache::lonnet();
use vars qw($msgcount);
use HTML::TokeParser;

# ===================================================================== Package

sub packagemsg {
    my ($subject,$message)=@_;
    $message=~s/\</\&lt\;/g;
    $message=~s/\>/\&gt\;/g;
    $subject=~s/\</\&lt\;/g;
    $subject=~s/\>/\&gt\;/g;
    my $now=time;
    $msgcount++;
    my $msgid=$now.'_'.$ENV{'user.name'}.'_'.
           $ENV{'user.domain'}.'_'.$msgcount.'_'.$$;
    return $msgid,
           '<sendername>'.$ENV{'user.name'}.'</sendername>'.
           '<senderdomain>'.$ENV{'user.domain'}.'</senderdomain>'.
           '<subject>'.$subject.'</subject>'.
	   '<time>'.localtime($now).'</time>'.
	   '<servername>'.$ENV{'SERVER_NAME'}.'</servername>'.
           '<host>'.$ENV{'HTTP_HOST'}.'</host>'.
	   '<client>'.$ENV{'REMOTE_ADDR'}.'</client>'.
	   '<browsertype>'.$ENV{'browser.type'}.'</browsertype>'.
	   '<browseros>'.$ENV{'browser.os'}.'</browseros>'.
	   '<browserversion>'.$ENV{'browser.version'}.'</browserversion>'.
           '<browsermathml>'.$ENV{'browser.mathml'}.'</browsermathml>'.
	   '<browserraw>'.$ENV{'HTTP_USER_AGENT'}.'</browserraw>'.
	   '<courseid>'.$ENV{'request.course.id'}.'</courseid>'.
	   '<role>'.$ENV{'request.role'}.'</role>'.
	   '<resource>'.$ENV{'request.filename'}.'</resource>'.
           '<msgid>'.$msgid.'</msgid>'.
	   '<message>'.$message.'</message>';
}

# ================================================== Unpack message into a hash

sub unpackagemsg {
    my $message=shift;
    my %content=();
    my $parser=HTML::TokeParser->new(\$message);
    my $token;
    while ($token=$parser->get_token) {
       if ($token->[0] eq 'S') {
	   my $entry=$token->[1];
           my $value=$parser->get_text('/'.$entry);
           $content{$entry}=$value;
       }
    }
    return %content;
}

# =============================== Automated message to the author of a resource

sub author_res_msg {
    my ($filename,$message)=@_;
    unless ($message) { return 'empty'; }
    $filename=&Apache::lonnet::declutter($filename);
    my ($domain,$author,@dummy)=split(/\//,$filename);
    my $homeserver=&Apache::lonnet::homeserver($author,$domain);
    if ($homeserver ne 'no_host') {
       my $id=unpack("%32C*",$message);
       my $msgid;
       ($msgid,$message)=&packagemsg($filename,$message);
       return &Apache::lonnet::reply('put:'.$domain.':'.$author.
         ':nohist_res_msgs:'.
          &Apache::lonnet::escape($filename.'_'.$id).'='.
          &Apache::lonnet::escape($message),$homeserver);
    }
    return 'no_host';
}

# ================================================== Critical message to a user

sub user_crit_msg {
    my ($user,$domain,$subject,$message)=@_;
# Check if allowed missing
    my $status='';
    my $msgid='undefined';
    unless (($message)&&($user)&&($domain)) { $status='empty'; };
    my $homeserver=&Apache::lonnet::homeserver($user,$domain);
    if ($homeserver ne 'no_host') {
       my $msgid;
       ($msgid,$message)=&packagemsg($subject,$message);
       $status=&Apache::lonnet::cput('critical',$msgid => $message);
    } else {
       $status='no_host';
    }
    &Apache::lonnet::logthis(
      '<font color=yellow>INFO: Sending critical email '.$msgid.
      ', log status: '.
      &Apache::lonnet::log($ENV{'user.domain'},$ENV{'user.name'},
                         $ENV{'user.home'},
      'Sending critical '.$msgid.' to '.$user.' at '.$domain.' with status: '
      .$status).'</font>');
    return $status;
}

# =================================================== Critical message received

sub user_crit_received {
    my $message=shift;

}

# ======================================================== Normal communication

sub user_normal_msg {
    my ($user,$domain,$subject,$message)=@_;
# Check if allowed missing
    my $status='';
    my $msgid='undefined';
    unless (($message)&&($user)&&($domain)) { $status='empty'; };
    my $homeserver=&Apache::lonnet::homeserver($user,$domain);
    if ($homeserver ne 'no_host') {
       my $msgid;
       ($msgid,$message)=&packagemsg($subject,$message);
       $status=&Apache::lonnet::cput('nohist_email',$msgid => $message);
    } else {
       $status='no_host';
    }
    &Apache::lonnet::log($ENV{'user.domain'},$ENV{'user.name'},
                         $ENV{'user.home'},
      'Sending '.$msgid.' to '.$user.' at '.$domain.' with status: '.$status);
    return $status;
}

# ================================================= Main program, reset counter

sub BEGIN {
    $msgcount=0;
}

1;
__END__