# Module of TWiki Enterprise Collaboration Platform, http://TWiki.org/
#
# Copyright (C) 2000-2018 Peter Thoeny, peter[at]thoeny.org
# and TWiki Contributors. All Rights Reserved. TWiki Contributors
# are listed in the AUTHORS file in the root of this distribution.
# NOTE: Please extend that file, not this notice.
#
# Additional copyrights apply to some or all of the code in this
# file as follows:
#
# This program 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 3
# of the License, or (at your option) any later version. For
# more details read LICENSE in the root of this distribution.
#
# This program 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.
#
# As per the GPL, removal of this notice is prohibited.

package TWiki::Configure::Checkers::MailProgram;

use strict;

use TWiki::Configure::Checker;

use base 'TWiki::Configure::Checker';

sub check {
    my $this = shift;

    return '' if( !$TWiki::cfg{EnableEmail} );

    eval "use Net::SMTP";
    my $n = '';
    my $useprog = 0;

    my $signmail = 0;
    if( $TWiki::cfg{SmimeCertificateFile} || $TWiki::cfg{SmimeKeyFile} ) {
	$signmail = 1;
	unless( $TWiki::cfg{SmimeCertificateFile} && $TWiki::cfg{SmimeKeyFile} ) {
	    $n = $this->WARN( "Signed e-mail requires both a certificate and a key file."); 
	}
    }
    if ($@) {
        $n .= "Net::SMTP is <b>not</b> installed in this environment. ";
        $useprog = 1;
    } elsif( !$TWiki::cfg{SMTP}{MAILHOST} ) {
        $n .= $this->WARN('Net::SMTP is installed in this environment, but {SMTP}{MAILHOST} is not defined, so the {MailProgram} <b>will</b> be used..') unless( $signmail );
        $useprog = 1;
    } else {
        $n .= $this->NOTE('<em>Net::SMTP is installed in this environment, so this setting will <b>not</b> be used.</em>');
	$n .= $this->WARN('<em>Signed e-mail is not supported by Net::SMTP.  If you want signed e-mail, please leave {SMTP}{MAILHOST} blank.  If not, please leave {SmimeCertificateFile} and {SmimeKeyFile} blank.') if( $signmail );
        $useprog = 0;
    }

    if ($useprog) {
        my $val = $TWiki::cfg{MailProgram} || '';
        $val =~ s/\s.*$//g;
        if( ! ( -x $val ) ) {
            $n .= $this->WARN("<tt>$val</tt> was not found. Check the path.");
        }
    }
    return $n;
}

1;