# --
# Copyright (C) 2001-2016 OTRS AG, http://otrs.com/
# --
# This software comes with ABSOLUTELY NO WARRANTY. For details, see
# the enclosed file COPYING for license information (AGPL). If you
# did not receive this file, see http://www.gnu.org/licenses/agpl.txt.
# --

package Kernel::System::DynamicField::ObjectType::Article;

use strict;
use warnings;

use Scalar::Util;

use Kernel::System::VariableCheck qw(:all);

our @ObjectDependencies = (
    'Kernel::System::DB',
    'Kernel::System::Log',
    'Kernel::System::Ticket',
);

=head1 NAME

Kernel::System::DynamicField::Backend::Article

=head1 SYNOPSIS

Article object handler for DynamicFields

=head1 PUBLIC INTERFACE

=over 4

=item new()

usually, you want to create an instance of this
by using Kernel::System::DynamicField::Backend->new();

=cut

sub new {
    my ( $Type, %Param ) = @_;

    my $Self = {};
    bless( $Self, $Type );

    return $Self;
}

=item PostValueSet()

perform specific functions after the Value set for this object type.

    my $Success = $DynamicFieldTicketHandlerObject->PostValueSet(
        DynamicFieldConfig => $DynamicFieldConfig,      # complete config of the DynamicField
        ObjectID           => $ObjectID,                # ID of the current object that the field
                                                        # must be linked to, e. g. TicketID
        Value              => $Value,                   # Value to store, depends on backend type
        UserID             => 123,
    );

=cut

sub PostValueSet {
    my ( $Self, %Param ) = @_;

    # check needed stuff
    for my $Needed (qw(DynamicFieldConfig ObjectID UserID)) {
        if ( !$Param{$Needed} ) {
            $Kernel::OM->Get('Kernel::System::Log')->Log(
                Priority => 'error',
                Message  => "Need $Needed!",
            );
            return;
        }
    }

    # check DynamicFieldConfig (general)
    if ( !IsHashRefWithData( $Param{DynamicFieldConfig} ) ) {
        $Kernel::OM->Get('Kernel::System::Log')->Log(
            Priority => 'error',
            Message  => "The field configuration is invalid",
        );
        return;
    }

    # check DynamicFieldConfig (internally)
    for my $Needed (qw(ID FieldType ObjectType)) {
        if ( !$Param{DynamicFieldConfig}->{$Needed} ) {
            $Kernel::OM->Get('Kernel::System::Log')->Log(
                Priority => 'error',
                Message  => "Need $Needed in DynamicFieldConfig!",
            );
            return;
        }
    }

    # Don't hold a permanent reference to the TicketObject.
    #   This is because the TicketObject has a Kernel::DynamicField::Backend object, which has this
    #   object, which has a TicketObject again. Without weaken() we'd have a cyclic reference.
    my $TicketObject = $Kernel::OM->Get('Kernel::System::Ticket');

    my %Article = $TicketObject->ArticleGet(
        ArticleID     => $Param{ObjectID},
        DynamicFields => 0,
    );

    # get database object
    my $DBObject = $Kernel::OM->Get('Kernel::System::DB');

    # update change time
    return if !$DBObject->Do(
        SQL => 'UPDATE ticket SET change_time = current_timestamp, '
            . ' change_by = ? WHERE id = ?',
        Bind => [ \$Param{UserID}, \$Article{TicketID} ],
    );

    # clear ticket cache
    $TicketObject->_TicketCacheClear( TicketID => $Article{TicketID} );

    # trigger event
    $TicketObject->EventHandler(
        Event => 'ArticleDynamicFieldUpdate',
        Data  => {
            FieldName => $Param{DynamicFieldConfig}->{Name},
            Value     => $Param{Value},
            OldValue  => $Param{OldValue},
            TicketID  => $Article{TicketID},
            ArticleID => $Param{ObjectID},
            UserID    => $Param{UserID},
        },
        UserID => $Param{UserID},
    );

    return 1
}

1;

=back

=head1 TERMS AND CONDITIONS

This software is part of the OTRS project (L<http://otrs.org/>).

This software comes with ABSOLUTELY NO WARRANTY. For details, see
the enclosed file COPYING for license information (AGPL). If you
did not receive this file, see L<http://www.gnu.org/licenses/agpl.txt>.

=cut
