# --
# Kernel/System/PostMaster/LoopProtection/DB.pm - backend module of LoopProtection
# Copyright (C) 2001-2007 OTRS GmbH, http://otrs.org/
# --
# $Id: DB.pm,v 1.7 2007/03/19 22:24:59 martin Exp $
# --
# This software comes with ABSOLUTELY NO WARRANTY. For details, see
# the enclosed file COPYING for license information (GPL). If you
# did not receive this file, see http://www.gnu.org/licenses/gpl.txt.
# --

package Kernel::System::PostMaster::LoopProtection::DB;

use strict;

use vars qw($VERSION);
$VERSION = '$Revision: 1.7 $';
$VERSION =~ s/^\$.*:\W(.*)\W.+?$/$1/;

sub new {
    my $Type = shift;
    my %Param = @_;

    # allocate new hash for object
    my $Self = {};
    bless ($Self, $Type);

    # get needed  objects
    foreach (qw(DBObject LogObject ConfigObject)) {
        $Self->{$_} = $Param{$_} || die "Got no $_!";
    }
    # get config options
    $Self->{PostmasterMaxEmails} = $Self->{ConfigObject}->Get('PostmasterMaxEmails') || 40;
    # create logfile name
    my ($Sec, $Min, $Hour, $Day, $Month, $Year) = localtime(time);
    $Year=$Year+1900;
    $Month++;
    $Self->{LoopProtectionDate} .= $Year.'-'.$Month.'-'.$Day;

    return $Self;
}

sub SendEmail {
    my $Self = shift;
    my %Param = @_;
    my $To = $Param{To} || return;

    # insert log
    if ($Self->{DBObject}->Do(
        SQL => "INSERT INTO ticket_loop_protection (sent_to, sent_date)".
            " VALUES ('".$Self->{DBObject}->Quote($To)."', '$Self->{LoopProtectionDate}')",
    )) {
        # delete old enrties
        $Self->{DBObject}->Do(
            SQL => "DELETE FROM ticket_loop_protection WHERE ".
                " sent_date != '$Self->{LoopProtectionDate}'",
        );
        return 1;
    }
    else {
        return;
    }
}

sub Check {
    my $Self = shift;
    my %Param = @_;
    my $To = $Param{To} || return;
    my $Count = 0;

    # check existing logfile
    my $SQL = "SELECT count(*) FROM ticket_loop_protection " .
        " WHERE " .
        " sent_to = '".$Self->{DBObject}->Quote($To)."' ".
        " AND ".
        " sent_date = '$Self->{LoopProtectionDate}'";
    $Self->{DBObject}->Prepare(SQL => $SQL);
    while (my @Row = $Self->{DBObject}->FetchrowArray()) {
        $Count = $Row[0];
    }
    # check possible loop
    if ($Count >= $Self->{PostmasterMaxEmails}) {
        $Self->{LogObject}->Log(
            Priority => 'notice',
            Message => "LoopProtection!!! Send no more emails to '$To'! Max. count of $Self->{PostmasterMaxEmails} has been reached!",
        );
        return;
    }
    else {
        return 1;
    }
}

1;