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tony |
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(*
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* IBX For Lazarus (Firebird Express)
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*
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* The contents of this file are subject to the Initial Developer's
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* Public License Version 1.0 (the "License"); you may not use this
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* file except in compliance with the License. You may obtain a copy
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* of the License here:
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*
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* http://www.firebirdsql.org/index.php?op=doc&id=idpl
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Initial Developer of the Original Code is Tony Whyman.
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*
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* The Original Code is (C) 2014 Tony Whyman, MWA Software
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* (http://www.mwasoftware.co.uk).
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*
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* All Rights Reserved.
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*
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* Contributor(s): ______________________________________.
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*
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*)
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unit IBLocalDBSupport;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, LResources, Forms, Controls, Dialogs, IBXCustomIBLocalDBSupport,
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IBXServices;
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tony |
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type
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{ TIBLocalDBSupport }
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TIBLocalDBSupport = class(TCustomIBLocalDBSupport)
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private
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procedure DoDowngrade(Data: PtrInt);
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procedure HandleGetDBVersionNo(Sender: TObject; var VersionNo: integer);
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procedure HandleUpgradeStepCompleted(Sender: TObject);
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protected
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function AllowInitialisation: boolean; override;
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function AllowRestore: boolean; override;
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function InternalCreateNewDatabase(DBArchive: string): boolean; override;
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procedure Downgrade(DBArchive: string); override;
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function RestoreDatabaseFromArchive(aFilename: string): boolean; override;
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function RunUpgradeDatabase(TargetVersionNo: integer): boolean; override;
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function SaveDatabaseToArchive(aFilename: string): boolean; override;
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published
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property Database;
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property DatabaseName;
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property Enabled;
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property EmptyDBArchive;
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property FirebirdDirectory;
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property Options;
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property RequiredVersionNo;
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property MinimumVersionNo;
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property UpgradeConfFile;
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property VendorName;
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property OnGetDatabaseName;
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property OnGetDBVersionNo;
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property OnNewDatabaseOpen;
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property OnGetSharedDataDir;
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end;
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implementation
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uses IBXUpgradeDatabaseDlg, IBXCreateDatabaseDlg, IBXSaveDatabaseDlg,
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Registry, IBXCreateDatabaseFromSQLDlgUnit;
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resourcestring
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sDowngradePrompt = 'Database Version %d found but Version %d expected. If you have '+
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'reinstalled this application after a failed upgrade then '+
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'it may be possible to restore a saved archive of the database '+
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'taken immediately before the upgrade. Do you want to do this?';
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sReplaceBackup = 'This action will replace the current database with the backup. '+
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'All data in the current database will be lost!';
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sReplaceInitial = 'This action will replace the current database with an initial database. '+
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'All data in the current database will be lost!';
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{ TIBLocalDBSupport }
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procedure TIBLocalDBSupport.DoDowngrade(Data: PtrInt);
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begin
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if AppDestroying in Application.Flags then Exit;
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RestoreDatabase(DownGradeArchive);
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DowngradeDone;
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end;
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procedure TIBLocalDBSupport.HandleGetDBVersionNo(Sender: TObject;
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var VersionNo: integer);
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begin
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VersionNo := CurrentDBVersionNo;
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end;
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procedure TIBLocalDBSupport.HandleUpgradeStepCompleted(Sender: TObject);
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begin
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UpdateVersionNo;
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end;
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function TIBLocalDBSupport.AllowInitialisation: boolean;
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begin
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Result := (iblQuiet in Options) or
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(MessageDlg(sReplaceInitial, mtWarning,[mbOK,mbCancel],0) = mrOK);
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end;
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function TIBLocalDBSupport.AllowRestore: boolean;
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begin
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Result := (iblQuiet in Options) or
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(MessageDlg(sReplaceBackup,mtWarning,[mbOK,mbCancel],0) = mrOK);
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end;
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function TIBLocalDBSupport.InternalCreateNewDatabase(DBArchive: string
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): boolean;
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begin
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if IsGBakFile(DBArchive) then
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begin
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Database.Attachment.Disconnect;
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try
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Result := IBXCreateDatabaseDlg.RestoreDatabaseFromArchive(RestoreService,DBArchive)
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finally
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Database.Attachment.Connect;
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end;
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end
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else
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Result := IBXCreateDatabaseFromSQLDlgUnit.CreateNewDatabase(Database,DBArchive)
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end;
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procedure TIBLocalDBSupport.Downgrade(DBArchive: string);
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begin
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if (iblQuiet in Options) or
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(MessageDlg(Format(sDowngradePrompt, [CurrentDBVersionNo,RequiredVersionNo]),
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mtWarning,[mbYes,mbNo],0) = mrYes) then
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begin
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inherited Downgrade(DBArchive);
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Application.QueueAsyncCall(@DoDowngrade,0);
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end;
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end;
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function TIBLocalDBSupport.RestoreDatabaseFromArchive(aFilename: string
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): boolean;
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begin
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Result := IBXCreateDatabaseDlg.RestoreDatabaseFromArchive(RestoreService,aFileName);
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end;
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function TIBLocalDBSupport.RunUpgradeDatabase(TargetVersionNo: integer
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): boolean;
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begin
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Result := IBXUpgradeDatabaseDlg.RunUpgradeDatabase(Database,BackupService,UpgradeConf,
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ChangeFileExt(ActiveDatabasePathName,''),
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TargetVersionNo,@HandleGetDBVersionNo, @HandleUpgradeStepCompleted);
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end;
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function TIBLocalDBSupport.SaveDatabaseToArchive(aFilename: string): boolean;
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begin
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Result := IBXSaveDatabaseDlg.SaveDatabaseToArchive(BackupService,aFileName);
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end;
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end.
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