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Bug 6955
 -  If IP-based blocking set in domain config is in effect for user's
    current IP address, and 'Messaging 'is among blocked functions:
   (a) 'Send Feedback' (in course context), for resource(s) which allow it
       is only messaging mechanism available to users with out 'evb' priv.
   (b) Subject and Content for messages sent to instructor(s) via 'Send Feedback'
       are replaced in user's Sent Folder with: "Not shown due to IP block".

# The LearningOnline Network
# Communicate
#
# $Id: loncommunicate.pm,v 1.48 2022/01/18 17:33:13 raeburn 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::loncommunicate;

use strict;
use Apache::Constants qw(:common);
use Apache::lonmsgdisplay();
use Apache::loncommon;
use Apache::lonlocal;
use Apache::lonnet;

sub menu {
    my $r=shift;
    my $crstype = 'course';
    my $usertype = 'student';
    if (defined($env{'course.'.$env{'request.course.id'}.'.type'})) {
        $crstype = $env{'course.'.$env{'request.course.id'}.'.type'};
        if ($crstype eq 'Community') {
            $usertype = 'member';
        }   
    }

    my $clientip = &Apache::lonnet::get_requestor_ip($r);
    my %setters;
    my ($startblock,$endblock,$triggerblock,$by_ip,$blockdom) =
        &Apache::loncommon::blockcheck(\%setters,'com',$clientip);
    if ($by_ip) {
        my $showdom = &Apache::lonnet::domain($blockdom);
        if ($showdom eq '') {
            $showdom = $blockdom;
        }
        $r->print('<p class="LC_warning">'.
                  &mt('Sending of LON-CAPA messages is blocked for your current IP address: [_1].',$clientip).'</p>'.
                  '<ul><li>'.&mt('Note: communication is being blocked for certain IP address(es).').
                  '</li><li>'.
                  &mt('This restriction was set by an administrator in the [_1] LON-CAPA domain.',$showdom).
                  '</li></ul><br />');
    }

# ------------------------------------------------------------------------ Menu
    my ($can_srm,$can_dcm,$can_dff);
    if ($env{'request.course.id'}) {
        if ((&Apache::lonnet::allowed('srm',$env{'request.course.id'})) ||
            (&Apache::lonnet::allowed('srm',$env{'request.course.id'}.'/'.
                                           $env{'request.course.sec'}))) {
            $can_srm = 1;
        }
        if ((&Apache::lonnet::allowed('dcm',$env{'request.course.id'})) ||
            (&Apache::lonnet::allowed('dcm',$env{'request.course.id'}.'/'.
                                           $env{'request.course.sec'}))) {
            $can_dcm = 1;
        }
        if ((&Apache::lonnet::allowed('dff',$env{'request.course.id'})) ||
            (&Apache::lonnet::allowed('dff',$env{'request.course.id'}.'/'.
                                           $env{'request.course.sec'}))) {
            $can_dff = 1;
        }
    }

    my @reports;
    unless ($by_ip) {
        @reports = (
            {categorytitle => 'Send Messages',
             items => [
            {url => '/adm/email?compose=individual',
			 permission => 'F',
			 icon => 'mail-message-new.png',
             linktext => 'New Message',
             linktitle => 'Send a message to users.'},
       
            {url => '/adm/email?compose=group',
			 permission => "$can_srm",
             icon => 'mail-reply-all.png',
             linktext => 'New Broadcast Message',
			 help => 'Course_Broadcast_Message',
             linktitle => "Send a broadcast message to members of this $crstype and/or other users."},
			 
			{url => '/adm/email?compose=upload',
			 permission => "$can_srm",
             icon => 'fromfile.png',
             linktext => 'New Messages from File',
			 linktitle => 'Create a message from file and send to users.'},
             ]},
        );
    }
		
    if ($can_dff || $can_dcm ){
        push(@reports,{categorytitle => 'Message Administration',
             items => [
            {url => '/adm/email?recordftf=query',
			 permission => "$can_dff",
             icon => 'messalog.png',
             linktext => 'Message Log for Selected Users',
			 help => 'Course_Face_To_Face_Records,Course_Critical_Message',
             linktitle => "User notes, records of face-to-face discussions, critical messages, broadcast messages and archived messages in $crstype."},
                    
            {url => '/adm/setblock?caller=email',
			 permission => "$can_dcm",
             icon => 'comblock.png',
			 linktext => 'Communication Blocking',
             linktitle => "Blocking of $usertype communication during exams."},
             ]});
    }
    if (@reports) {
        $r->print(&Apache::lonhtmlcommon::generate_menu(@reports));
    }
    return;
}

sub handler {
    my $r = shift;
    &Apache::loncommon::content_type($r,'text/html');
    $r->send_http_header;
    return OK if $r->header_only;
#
# Start document
#

# ----------------------------------------------------------------- Breadcrumbs
    &Apache::lonhtmlcommon::clear_breadcrumbs();
    &Apache::lonhtmlcommon::add_breadcrumb
        ({href=>"/adm/communicate",
          text=>"Communication/Messages",
          faq=>12,bug=>'Communication Tools',});

# ---------------------------------------------------------------------- Header
    &Apache::lonmsgdisplay::header($r);
    &menu($r);
    &Apache::lonmsgdisplay::disall($r);
    $r->print(&Apache::loncommon::end_page());
    return OK;
}

1;
__END__