#
# $Id: lonwhatsnew.pm,v 1.5 2005/04/07 06:56:23 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#


package Apache::lonwhatsnew;

use strict;
use lib qw(/home/httpd/lib/perl);
use Apache::lonnet;
use Apache::loncommon();
use Apache::lonhtmlcommon();
use Apache::lonlocal;
use Apache::loncoursedata();
use Apache::lonnavmaps();
use Apache::Constants qw(:common :http);
use Time::Local;

#----------------------------
# handler
#
#----------------------------

sub handler {
    my $r = shift;
    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['command']);

    my $command = $env{'form.command'};

    if ($command eq '') {
        $command = "info";
    }

    $r->print(&display_header());
    if (! (($env{'request.course.fn'}) && (&Apache::lonnet::allowed('vsa',$env{'request.course.id'})))) {
        # Not in a course, or not allowed to modify parms
        $env{'user.error.msg'}="/adm/whatsnew:vsa:0:0:Cannot display student activity";
        return HTTP_NOT_ACCEPTABLE;
    }

    &display_main_box($r,$command);
}

#------------------------------
# display_main_box
#
# Display all the elements within the main box
#------------------------------
                                                                                
sub display_main_box {
    my ($r,$command) = @_;
    my $domain=&Apache::loncommon::determinedomain();
    my $tabbg=&Apache::loncommon::designparm('coordinator.tabbg',$domain);
    $r->print(<<END_OF_BLOCK);
<br />
<br />
<table width="100%" border="0" cellpadding="0" cellspacing="0">
 <tr>
  <td width="100%" bgcolor="#000000">
   <table width="100%" border="0" cellpadding="1" cellspacing="0">
    <tr>
     <td width="100%" bgcolor="#000000">
      <table width="100%" border="0" cellpadding="0" cellspacing="1" bgcolor="#ffffff">
       <tr>
        <td colspan="2" width="100%" bgcolor="$tabbg">
         <table width="100%" border="0" cellpadding="5" cellspacing="0">
          <tr>
           <td width="100%">
            <table width="100%" border="0" cellpadding="0" cellspacing="0">
             <tr>
              <td>
               <font face="arial,verdana" size="3"><b>Course Action Items</b></font></td>
              </td>
              <td align="right">&nbsp;
              </td>
             </tr>
            </table>
           </td>
          </tr>
         </table>
        </td>
       </tr>
       <tr>
        <td width="100" valign="top" bgcolor="#dddddd" height="100%">
         <table width="100" border="0" cellpadding="0" cellspacing="0" height="100%">
          <tr>
           <td valign="top" height="100%">
END_OF_BLOCK
    &display_nav_box($r,$command);
    $r->print('</td></tr></table></td>');
    $r->print('<td width="100%" bgcolor="#ffffff"><table width="100%" border="0" cellpadding="5" cellspacing="0"><tr><td width="100%">');
 
    if ($command eq 'config') {
        &display_config_box($r);
    } else {
        &display_actions_box($r);
    }
    $r->print(<<END_OF_BLOCK);
              </td>
             </tr>
            </table>
           </td>
          </tr>
         </table>
        </td>
       </tr>
      </table>
     </td>
    </tr>
   </table>
  </td>
 </tr>
</table><br />
</body>
</html>
END_OF_BLOCK
}

#------------------------------
# display_nav_box
#
# Display the navigation box
#------------------------------
                                                                                
sub display_nav_box {
    my ($r,$command) = @_;
    $r->print('<table width="100" border="0" cellpadding="3" cellspacing="0">'."\n");
    if ($command eq "info") {
        $r->print('<tr><td bgcolor="#ffffff">');
        $r->print('<small><b>Action Items</b></small><br />');
        $r->print('</td></tr>');
    } else {
        $r->print('<tr><td>');
        $r->print('<small><a href="/adm/whatsnew?command=info">Current Action Items</a></small><br />');
        $r->print('</td></tr>');
    }
    $r->print('<tr><td>&nbsp;</td></tr>');
    if ($command eq "config") {
        $r->print('<tr><td bgcolor="#ffffff">');
        $r->print('<small><b>Display options</b></small><br />');
        $r->print('</td></tr>');
    } else {
        $r->print('<tr><td>');
        $r->print('<small><a href="/adm/whatsnew?command=config">Display options</a></small><br />');
        $r->print('</td></tr>');
    }
    $r->print('</table>');
}

#-------------------------------
# display_header
#
# Display the header information and set
# up the HTML
#-------------------------------

sub display_header{
    my $html=&Apache::lonxml::xmlbegin();
    my $bodytag=&Apache::loncommon::bodytag('Course Action Items');
    return(<<ENDHEAD);
$html
<head>
<title>Course Action Items</title>
</head>
$bodytag
ENDHEAD
}

#-------------------------------
# display_actions_box
#
# Display the action items
#
#-------------------------------
                                                                                
sub display_actions_box() {
    my $r = shift;

    my $rowColor1 = "#ffffff";
    my $rowColor2 = "#eeeeee";
    my $rowColor;

    my %unread = ();
    my %ungraded = ();
    my %bombed = ();
    my @newmsgs = ();
    my @critmsgs = ();
    my @newdiscussions = ();
    my @tograde = ();
    my @bombs = ();

    my $domain=&Apache::loncommon::determinedomain();
    my $function;
    if ($env{'request.role'}=~/^(cc|in|ta|ep)/) {
        $function='coordinator';
    }
    if ($env{'request.role'}=~/^(su|dc|ad|li)/) {
        $function='admin';
    }

    my $pgbg=&Apache::loncommon::designparm($function.'.pgbg',$domain);
    my $tabbg=&Apache::loncommon::designparm($function.'.tabbg',$domain);

    &getitems(\%unread,\%ungraded,\%bombed,\@newdiscussions,\@tograde,\@bombs);
    my ($msgcount,$critmsgcount) = &getmail(\@newmsgs,\@critmsgs);

    unless ($env{'request.course.id'}) {
        $r->print('<br /><b><center>You are accessing an invalid course</center></b><br /><br />');
        return;
    }

    $r->print('<b>Course Action Items</b><br /><hr width="100%" /><table border="0" width="100%" cellpadding="2" cellspacing="4" bgcolor="#ffffff"><tr><td align="left" valign="top" width="45%">');

## UNREAD COURSE DISCUSSION POSTS ##
    $r->print(<<"END");
              <table border="0" cellpadding="0" cellspacing="0" bgcolor="#000000" width="100%">
               <tr><td>
                <table border="0" cellpadding="1" cellspacing="1" bgcolor="#000000" width="100%">
                 <tr>
                  <td bgcolor="$tabbg"><b>Unread course discussion posts:</b></td>
                 </tr>
                 <tr>
                   <td bgcolor="#ffffff">
                   <table cellpadding="2" cellspacing="0" border="0" width="100%">
END

    if (@newdiscussions > 0) {
#        @newdiscussions = sort { &cmp_title($a,$b) } @newdiscussions;
        my $rowNum = 0;
        foreach my $ressymb (@newdiscussions) {
            my $forum_title = $unread{$ressymb}{'title'};
	    my $feedurl=&Apache::lonfeedback::get_feedurl($ressymb);
            my $unreadnum = keys(%{$unread{$ressymb}});
            $unreadnum = $unreadnum - 2;
            if ($unreadnum > 0) {
                if ($rowNum %2 == 1) {
                    $rowColor = $rowColor1;
                } else {
                    $rowColor = $rowColor2;
                }
                $r->print('<tr><td bgcolor="'.$rowColor.'"><small><a href="'.$feedurl.'?symb='.$unread{$ressymb}{symb}.'">'.$forum_title.':</a>&nbsp;</td><td bgcolor="'.$rowColor.'" align="right">'.$unreadnum.'&nbsp;</td></tr>');
                $rowNum ++;
            }
        }
    } else {
        $r->print('<tr><td bgcolor="#ffffff"><br><center>&nbsp;<i><b><small>No unread posts in course discussions</small></b></i><br><br></td></tr>');
    }
    $r->print('</table></td></tr></table></td></tr></table><br />');

## UNGRADED ITEMS ##
    $r->print(<<END);
           <table border="0" cellpadding="0" cellspacing="0" bgcolor="#000000" width="100%">
            <tr><td>
             <table border="0" cellpadding="1" cellspacing="1" bgcolor="#000000" width="100%">
              <tr>
               <td bgcolor="$tabbg"><b>Problems requiring handgrading:</b></td></tr>
                  <tr>
                   <td bgcolor="#ffffff">
                     <table cellpadding="2" cellspacing="0" border="0" width="100%">
END

    if (@tograde > 0) {
        $r->print('<tr><th bgcolor="#cccccc">Problem Name</th><th>Number ungraded</th></tr>');
        my $rowNum = 0;
        foreach my $res (@tograde) {
            if ($rowNum %2 == 1) {
                $rowColor = $rowColor1;
            } else {
                $rowColor = $rowColor2;
            }
            
            $r->print('<tr bgcolor="'.$rowColor.'"><td>'.$ungraded{$res}{title}.'</td><td>'.$ungraded{$res}{count}.'</td></tr>');
            $rowNum ++;
        }
    } else {
        $r->print('<tr><td bgcolor="#ffffff"><br><center><i><b><small>&nbsp;&nbsp;No problems require handgrading&nbsp;&nbsp;</small><br><br></b></i></td></tr>');
    }
    $r->print('</table></td></tr></table></td></tr></table><br />');
    $r->print('</td><td width="5%">&nbsp;</td><td align="left" valign="top" width-"50%">');

## MESSAGES ##
    $r->print(<<END);
           <table border="0" cellpadding="0" cellspacing="0" bgcolor="#000000" width="100%">
            <tr>
             <td>
              <table border="0" cellpadding="1" cellspacing="1" bgcolor="#000000" width="100%">
               <tr>
                <td bgcolor="$tabbg"><b>New course messages</b></td>
               </tr>
               <tr>
                <td bgcolor="#ffffff">
                 <table width="100%" cellspacing="0" cellpadding="0" border="0">
END
    if ($msgcount > 0) {
        my $rowNum = 0;
        my $mailcount = 1; 
        foreach my $msg (@newmsgs) {
            if ($rowNum %2 == 1) {
                $rowColor = $rowColor1;
            } else {
                $rowColor = $rowColor2;
            }
            $r->print('<tr><td bgcolor="'.$rowColor.'" valign="top"><small>'.$mailcount.'. &nbsp;<small></td><td valign="top"><small><a href="/adm/mail?">'.$msg->{'shortsub'}.'</a>&nbsp; &nbsp;</small></td><td valign="top"><small>&nbsp;'.$msg->{'from'}.'@'.$msg->{'fromdom'}.'&nbsp;</small></td><td valign="top"><small>'.$msg->{'sendtime'}.'</small></td></tr>');
            $rowNum ++;
            $mailcount ++;
        }
    } else {
        $r->print('<tr><td bgcolor="#ffffff" width="100%"><center><br /><b><i><small>No new course messages</small></i></b><br /><br /></center></td></tr>');
    }

    $r->print('</table></td></tr></table></td></tr></table><br />');

    $r->print(<<END);
           <table border="0" cellpadding="0" cellspacing="0" bgcolor="#000000" width="100%">
            <tr>
             <td>
              <table border="0" cellpadding="1" cellspacing="1" bgcolor="#000000" width="100%">
               <tr>
                <td bgcolor="$tabbg"><b>New critical messages in course</b></td>
               </tr>
               <tr>                 <td bgcolor="#ffffff">
                 <table width="100%" cellspacing="0" cellpadding="0" border="0">
END

    if ($critmsgcount > 0) {
        my $rowNum = 0;
        my $mailcount = 1;
        foreach my $msg (@critmsgs) {
            if ($rowNum %2 == 1) {
                $rowColor = $rowColor1;
            } else {
                $rowColor = $rowColor2;
            }
            $r->print('<tr><td bgcolor="'.$rowColor.'" valign="top"><small>'.$mailcount.'. &nbsp;<small></td><td valign="top"><small><a href="/adm/mail?">'.$msg->{'shortsub'}.'</a>&nbsp; &nbsp;</small></td><td valign="top"><small>&nbsp;'.$msg->{'from'}.'@'.$msg->{'fromdom'}.'&nbsp;</small></td><td valign="top"><small>'.$msg->{'sendtime'}.'</small></td></tr>');
            $rowNum ++;
            $mailcount ++;
        }
    } else {
        $r->print('<tr><td bgcolor="#ffffff" width="100%"><center><br /><b><i><small>No unread critical messages in course</small></i></b><br /><br /></center></td></tr>');
    }
                                                                               
    $r->print('</table></td></tr></table></td></tr></table><br />');

## BOMBS ##
    $r->print(<<END);
           <table border="0" cellpadding="0" cellspacing="0" bgcolor="#000000" width="100%">
            <tr>
             <td>
              <table border="0" cellpadding="1" cellspacing="1" bgcolor="#000000" width="100%">
               <tr>
                <td bgcolor="$tabbg"><b>Problems with errors</b></td>
               </tr>
               <tr>
                <td bgcolor="#ffffff">
                 <table width="100%" cellspacing="0" cellpadding="0" border="0">
END
    my $bombnum = 0;
    if (@bombs > 0) {
#        @bombs = sort { &cmp_title($a,$b) } @bombs;
        foreach my $bomb (@bombs) {
            if ($bombnum %2 == 1) {
                $rowColor = $rowColor1;
            } else {
                $rowColor = $rowColor2;
            }
            $r->print('<tr bgcolor="'.$rowColor.'"><td>'.$bombed{$bomb}{errorlink}.'</td></tr>');
            $bombnum ++;
        }
    } else {
        $r->print('<tr><td bgcolor="#ffffff"><br /><center><b><i><small>No problems with errors</small></i></b></center><br /></td></tr>');
    }
    $r->print('</table></td></tr></td></tr></table>');
    $r->print('
           </table>
          </td>
         </tr>
        </table>');
    $r->print('</td></tr></table>');
}

sub getitems {
    my ($unread,$ungraded,$bombed,$newdiscussions,$tograde,$bombs) = @_;
    my $navmap = Apache::lonnavmaps::navmap->new();
    my @allres=$navmap->retrieveResources();
    my %discussiontime = &Apache::lonnet::dump('discussiontimes',
               $env{'course.'.$env{'request.course.id'}.'.domain'},
               $env{'course.'.$env{'request.course.id'}.'.num'});
    my %lastread = &Apache::lonnet::dump('nohist_'.$env{'request.course.id'}.'_discuss',$env{'user.domain'},$env{'user.name'},'lastread');
    my %lastreadtime = ();
    my @discussions = ();
    my ($classlist,$keylist) = &Apache::loncoursedata::get_classlist();

    foreach my $key (keys(%lastread)) {
        my $newkey = $key;
        $newkey =~ s/_lastread$//;
        $lastreadtime{$newkey} = $lastread{$key};
    }
    foreach my $resource (@allres) {
        my $result = '';
        my $applies = 0;
        my $symb = $resource->symb();
        %{$$bombed{$symb}} = ();
        %{$$ungraded{$symb}} = ();
        my $title = $resource->compTitle();
        my $ressymb = $symb;
        if ($ressymb =~ m-(___adm/\w+/\w+)/(\d+)/bulletinboard$-) {
            $ressymb = &Apache::lonfeedback::wrap_symb('bulletin___'.$2.$1.'/'.
						       $2.'/bulletinboard');
        }

# Check for unread discussion postings
        if (defined($discussiontime{$ressymb})) {
            push(@discussions,$ressymb);
            my $prevread = 0;
            my $unreadcount = 0;
            %{$$unread{$ressymb}} = ();
            $$unread{$ressymb}{'title'} = $title;
            $$unread{$ressymb}{'symb'} = $symb;
            if (defined($lastreadtime{$ressymb})) {
                $prevread = $lastreadtime{$ressymb};
            }
            my %contrib = &Apache::lonnet::restore($ressymb,$env{'request.course.id'},
            $env{'course.'.$env{'request.course.id'}.'.domain'},
            $env{'course.'.$env{'request.course.id'}.'.num'});
            if ($contrib{'version'}) {
                for (my $id=1;$id<=$contrib{'version'};$id++) {
                    unless (($contrib{'hidden'}=~/\.$id\./) || ($contrib{'deleted'}=~/\.$id\./)) {
                        if ($prevread <$contrib{$id.':timestamp'}) {
                            $$unread{$ressymb}{$unreadcount} = $id.': '.$contrib{$id.':subject'};
                            $unreadcount ++;
                            push(@{$newdiscussions}, $ressymb);
                        }
                    }
                }
            }
        }

# Check for ungraded problems
        if ($resource->is_problem()) {
            my $ctr = 0;
            my ($map,$ind,$url)=&Apache::lonnet::decode_symb($symb);
            my ($partlist,$handgrade,$responseType) = &Apache::grades::response_type($url,$symb);
            foreach my $student (keys(%$classlist)) {
                my ($uname,$udom) = split(/:/,$student);
                my %status=&Apache::grades::student_gradeStatus($url,$symb,$udom,$uname,$partlist);
                my $submitted = 0;
                my $graded = 0;
                foreach (keys(%status)) {
                    $submitted = 1 if ($status{$_} ne 'nothing');
                    $graded = 1 if ($status{$_} !~ /^correct/);
                    my ($foo,$partid,$foo1) = split(/\./,$_);
                    if ($status{'resource.'.$partid.'.submitted_by'} ne '') {
                        $submitted = 0;
                    }
                }
                next if (!$submitted || !$graded);
                $ctr ++;
            }
            if ($ctr) {
                $$ungraded{$symb}{count} = $ctr;
                $$ungraded{$symb}{title} = $title;
                push(@{$tograde}, $symb);
            }
        }

# Check for bombs
        if ($resource->getErrors()) {
            my $errors = $resource->getErrors();
            my @bombs = split(/,/, $errors);
            my $errorcount = scalar(@bombs);
            my $errorlink = '<a href="/adm/email?display='.
                            &Apache::lonnet::escape($$bombs[0]).'">';
            $$bombed{$symb}{errorcount} = $errorcount;
            $$bombed{$symb}{errorlink} = $errorlink;
            push(@{$bombs}, $symb);
        }
    }
# Compile maxtries and degree of difficulty.
}

sub getmail {
    my ($newmsgs,$critmsgs) = @_;
# Check for unread mail in course
    my $msgcount = 0;

    my @messages = &Apache::lonnet::getkeys('nohist_email');
    foreach my $message (@messages) {
	my $msgid=&Apache::lonnet::escape($message);
        my ($sendtime,$shortsubj,$fromname,$fromdom,$fromcid,$status)=
            &Apache::lonmsg::unpackmsgid($msgid);
        if ($fromcid eq $env{'request.course.id'}) {
            if (defined($sendtime) && $sendtime!~/error/) {
                my $numsendtime = $sendtime;
                $sendtime = &Apache::lonlocal::locallocaltime($sendtime);
                if ($status eq 'new') {
                    $$msgcount ++;
                    push(@{$newmsgs}, {
                        msgid    => $msgid,
                        sendtime => $sendtime,
                        shortsub => &Apache::lonnet::unescape($shortsubj),
                        from     => $fromname,
                        fromdom  => $fromdom
                        });
                }
            }
        }
    }

# Check for critical messages in course
    my %what=&Apache::lonnet::dump('critical');
    my $result = '';
    my $critmsgcount = 0;
    foreach my $msgid (sort(keys(%what))) {
        my ($sendtime,$shortsubj,$fromname,$fromdom,$fromcid,$status)=
            &Apache::lonmsg::unpackmsgid($_);
        if ($fromcid eq  $env{'request.course.id'}) {
            if (defined($sendtime) && $sendtime!~/error/) {
                my $numsendtime = $sendtime;
                $sendtime = &Apache::lonlocal::locallocaltime($sendtime);
                $critmsgcount ++;
                push(@{$critmsgs}, {
                        msgid    => $msgid,
                        sendtime => $sendtime,
                        shortsub => &Apache::lonnet::unescape($shortsubj),
                        from     => $fromname,
                        fromdom  => $fromdom
                        });
            }
        }
    }
    return ($msgcount,$critmsgcount);
}

sub cmp_title {
    my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
    $atitle=~s/^\s*//;
    $btitle=~s/^\s*//;
    return $atitle cmp $btitle;
}