# --
# Copyright (C) 2001-2021 OTRS AG, https://otrs.com/
# --
# 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 https://www.gnu.org/licenses/gpl-3.0.txt.
# --

package Kernel::System::Queue::PreferencesDB;

use strict;
use warnings;

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

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

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

    # preferences table data
    $Self->{PreferencesTable}        = 'queue_preferences';
    $Self->{PreferencesTableKey}     = 'preferences_key';
    $Self->{PreferencesTableValue}   = 'preferences_value';
    $Self->{PreferencesTableQueueID} = 'queue_id';

    # create cache prefix
    $Self->{CachePrefix} = 'QueuePreferencesDB'
        . $Self->{PreferencesTable}
        . $Self->{PreferencesTableKey}
        . $Self->{PreferencesTableValue}
        . $Self->{PreferencesTableQueueID};

    $Self->{CacheType} = 'Queue';
    $Self->{CacheTTL}  = 60 * 60 * 24 * 20;

    return $Self;
}

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

    # check needed stuff
    for (qw(QueueID Key Value)) {
        if ( !defined $Param{$_} ) {
            $Kernel::OM->Get('Kernel::System::Log')->Log(
                Priority => 'error',
                Message  => "Need $_!",
            );
            return;
        }
    }

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

    # delete old data
    return if !$DBObject->Do(
        SQL => "DELETE FROM $Self->{PreferencesTable} WHERE "
            . "$Self->{PreferencesTableQueueID} = ? AND $Self->{PreferencesTableKey} = ?",
        Bind => [ \$Param{QueueID}, \$Param{Key} ],
    );

    # insert new data
    return if !$DBObject->Do(
        SQL => "INSERT INTO $Self->{PreferencesTable} ($Self->{PreferencesTableQueueID}, "
            . " $Self->{PreferencesTableKey}, $Self->{PreferencesTableValue}) "
            . " VALUES (?, ?, ?)",
        Bind => [ \$Param{QueueID}, \$Param{Key}, \$Param{Value} ],
    );

    # delete cache
    $Kernel::OM->Get('Kernel::System::Cache')->Delete(
        Type => $Self->{CacheType},
        Key  => $Self->{CachePrefix} . $Param{QueueID},
    );

    return 1;
}

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

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

    # check if queue preferences are available
    return if !$Kernel::OM->Get('Kernel::Config')->Get('QueuePreferences');

    # read cache
    my $Cache = $Kernel::OM->Get('Kernel::System::Cache')->Get(
        Type => $Self->{CacheType},
        Key  => $Self->{CachePrefix} . $Param{QueueID},
    );
    return %{$Cache} if $Cache;

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

    # get preferences
    return if !$DBObject->Prepare(
        SQL => "SELECT $Self->{PreferencesTableKey}, $Self->{PreferencesTableValue} "
            . " FROM $Self->{PreferencesTable} WHERE $Self->{PreferencesTableQueueID} = ?",
        Bind => [ \$Param{QueueID} ],
    );

    my %Data;
    while ( my @Row = $DBObject->FetchrowArray() ) {
        $Data{ $Row[0] } = $Row[1];
    }

    # set cache
    $Kernel::OM->Get('Kernel::System::Cache')->Set(
        Type  => $Self->{CacheType},
        TTL   => $Self->{CacheTTL},
        Key   => $Self->{CachePrefix} . $Param{QueueID},
        Value => \%Data,
    );

    return %Data;
}

1;
