134 lines
3.3 KiB
Perl
134 lines
3.3 KiB
Perl
# --
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# Copyright (C) 2001-2019 OTRS AG, https://otrs.com/
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# --
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# This software comes with ABSOLUTELY NO WARRANTY. For details, see
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# the enclosed file COPYING for license information (GPL). If you
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# did not receive this file, see https://www.gnu.org/licenses/gpl-3.0.txt.
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# --
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#
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# Generates auto increment change numbers like ss.... (e. g. 1010138, 1010139, ...)
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# --
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package Kernel::System::ITSMChange::Number::AutoIncrement;
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use strict;
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use warnings;
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use parent qw(Kernel::System::ITSMChange::NumberBase);
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our @ObjectDependencies = (
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'Kernel::Config',
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'Kernel::System::DB',
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'Kernel::System::ITSMChange',
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);
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sub IsDateBased {
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return 0;
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}
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sub ChangeNumberBuild {
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my ( $Self, $Offset ) = @_;
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$Offset ||= 0;
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my $BaseCounter = 1;
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if ( $Self->ChangeNumberCounterIsEmpty() ) {
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$BaseCounter = $Self->InitialCounterOffsetCalculate();
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}
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my $Counter = $Self->ChangeNumberCounterAdd(
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Offset => $BaseCounter + $Offset,
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);
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return if !$Counter;
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my $ConfigObject = $Kernel::OM->Get('Kernel::Config');
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my $SystemID = $ConfigObject->Get('SystemID');
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my $MinSize = $ConfigObject->Get('ITSMChange::NumberGenerator::AutoIncrement::MinCounterSize')
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|| $ConfigObject->Get('ITSMChange::NumberGenerator::MinCounterSize')
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|| 5;
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# Pad change number with leading '0' to length $MinSize (config option).
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$Counter = sprintf "%.*u", $MinSize, $Counter;
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my $ChangeNumber = $SystemID . $Counter;
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return $ChangeNumber;
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}
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#
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# Calculate initial counter value on (migrated) systems that already have changes,
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# but no counter entries yet.
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#
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sub InitialCounterOffsetCalculate {
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my ( $Self, %Param ) = @_;
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my $LastChangeNumber = $Self->_GetLastChangeNumber();
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return 1 if !$LastChangeNumber;
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# If the change number was created by a date based generator, change counter needs to start from 1
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return 1 if $Self->_LooksLikeDateBasedChangeNumber($LastChangeNumber);
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my $ConfigObject = $Kernel::OM->Get('Kernel::Config');
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my $SystemID = $ConfigObject->Get('SystemID');
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# Remove SystemID and leading zeros
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$LastChangeNumber =~ s{\A $SystemID 0* }{}msx;
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return 1 if !$LastChangeNumber;
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return $LastChangeNumber + 1;
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}
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sub _GetLastChangeNumber {
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my ( $Self, %Param ) = @_;
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my $DBObject = $Kernel::OM->Get('Kernel::System::DB');
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return if !$DBObject->Prepare(
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SQL => 'SELECT MAX(id) FROM change_item',
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);
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my $ChangeID;
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while ( my @Data = $DBObject->FetchrowArray() ) {
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$ChangeID = $Data[0];
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}
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return if $ChangeID && $ChangeID == 1;
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my %Change = $Kernel::OM->Get('Kernel::System::ITSMChange')->ChangeGet(
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ChangeID => $ChangeID,
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UserID => 1,
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LogNo => 1,
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);
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return if !%Change;
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return if !$Change{ChangeNumber};
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return $Change{ChangeNumber};
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}
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sub _LooksLikeDateBasedChangeNumber {
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my ( $Self, $ChangeNumber ) = @_;
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return if !$ChangeNumber;
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my $PossibleDate = substr $ChangeNumber, 0, 8;
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return if length $PossibleDate != 8;
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# Format possible date as a date string
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$PossibleDate =~ s{\A (\d{4}) (\d{2}) (\d{2}) \z}{$1-$2-$3 00:00:00}gsmx;
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my $DateTimeObject = $Kernel::OM->Create('Kernel::System::DateTime');
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my $Result = $DateTimeObject->Set( String => $PossibleDate );
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return if !$Result;
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return 1;
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}
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1;
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