source: oup/current/DataAccess/Access_OUP_ADB.pas@ 154

unit Access_OUP_ADB;
interface

uses DataAccess, ABSMain, TypeDefs, Classes;

type
  TAccess_OUP_ADB = class(TDataAccess)
  private
    FDatabase:          TABSDatabase;
    FQuery:             TABSQuery;
    Fdat_files:         TFiles;
    Fdat_extensionsmap: TExtensionsMap;
  protected
  public
    constructor Create(DBFilename: String; ConnectionID: Integer; var Msg: TStatusMessages); override;
    procedure Close; override;

    procedure UpdateListCache;

    function GetLinksToFile(FileID: Integer): TLinks;

    function GetFileInfo(FileID: Integer): TFileInfo; override;
    function GetFilesList(Ext: String; Pattern: String;
      NoEmptyFiles: Boolean; SortType: TSortType): TStrings; override;
    function GetFileCount: Integer; override;
    function GetExtensionsList(ExtListFormat: TExtensionFormat): TStrings; override;

    procedure LoadDatFile(FileID: Integer; var Target: TStream); overload; override;
    procedure UpdateDatFile(FileID: Integer; Src: TStream); overload; override;
    procedure LoadDatFilePart(FileID, Offset, Size: Integer; var Target: TStream); overload; override;
    procedure UpdateDatFilePart(FileID, Offset, Size: Integer; Src: TStream); overload; override;

    function GetDatLinks(FileID: Integer): TDatLinkList; override;
    function GetDatLink(FileID, DatOffset: Integer): TDatLink; override;
    function GetRawList(FileID: Integer): TRawDataList; override;
    function GetRawInfo(FileID, DatOffset: Integer): TRawDataInfo; override;

    procedure LoadRawFile(FileID, DatOffset: Integer; var Target: TStream); overload; override;
    procedure UpdateRawFile(FileID, DatOffset: Integer; Src: TStream); overload; override;
    procedure LoadRawFilePart(FileID, DatOffset, Offset, Size: Integer; var Target: TStream); overload; override;
    procedure UpdateRawFilePart(FileID, DatOffset, Offset, Size: Integer; Src: TStream); overload; override;
  published
  end;


implementation

uses
  SysUtils, Data, Functions, ABSDecUtil, DB, DatLinks;


(*
================================================================================
                     Implementation of  TOniDataADB
*)


constructor TAccess_OUP_ADB.Create(DBFilename: String; ConnectionID: Integer; var Msg: TStatusMessages);
begin
  Msg := SM_UnknownError;
  if not FileExists(DBFilename) then
  begin
    Msg := SM_FileNotFound;
    Exit;
  end;
  FFileName := DBFilename;

  FDatabase := TABSDatabase.Create(nil);
  FDatabase.Exclusive := True;
  FDatabase.MultiUser := False;
  FDatabase.DatabaseName := 'OLDBcon' + IntToStr(ConnectionID);
  FDatabase.DatabaseFileName := DBFilename;
  FDatabase.Open;
  FQuery := TABSQuery.Create(FDatabase);
  FQuery.DisableControls;
  FQuery.RequestLive := False;
  FQuery.DatabaseName := 'OLDBcon' + IntToStr(ConnectionID);
  FQuery.SQL.Text := 'SELECT [name],[value] FROM globals ORDER BY [name] ASC';
  FQuery.Open;
  FQuery.First;
  repeat
    if FQuery.FieldByName('name').AsString = 'dbversion' then
    begin
      if FQuery.FieldByName('value').AsString <> DBversion then
      begin
        Msg := SM_IncompatibleDBVersion;
        FQuery.Close;
        Exit;
      end;
    end;
    if FQuery.FieldByName('name').AsString = 'lvl' then
      FLevelNumber := StrToInt(FQuery.FieldByName('value').AsString);
    if FQuery.FieldByName('name').AsString = 'DataOS' then
    begin
      if FQuery.FieldByName('value').AsString = 'WIN' then
        FDataOS := DOS_WIN
      else if FQuery.FieldByName('value').AsString = 'WINDEMO' then
        FDataOS := DOS_WINDEMO
      else if FQuery.FieldByName('value').AsString = 'MAC' then
        FDataOS := DOS_MAC
      else if FQuery.FieldByName('value').AsString = 'MACBETA' then
        FDataOS := DOS_MACBETA;
    end;
    FQuery.Next;
  until FQuery.EOF;
  FQuery.Close;

  Msg := SM_OK;
  FBackend := DB_ADB;

  FConnectionID := ConnectionID;
  FChangeRights := [CR_EditDat, CR_EditRaw, CR_ResizeDat, CR_ResizeRaw];

  UpdateListCache;
end;




procedure TAccess_OUP_ADB.Close;
begin
  FQuery.Free;
  FDatabase.Close;
  FDatabase.Free;
  Self.Free;
end;



procedure TAccess_OUP_ADB.UpdateListCache;
var
  i:     Integer;
  temps: String;
begin
  FQuery.SQL.Text := 'SELECT id,name,extension,[size],contenttype FROM datfiles ORDER BY id ASC;';
  FQuery.Open;
  SetLength(Fdat_files, FQuery.RecordCount);
  if FQuery.RecordCount > 0 then
  begin
    FQuery.First;
    i := 0;
    repeat
      Fdat_files[i].ID := FQuery.FieldByName('id').AsInteger;
      Fdat_files[i].Name := FQuery.FieldByName('name').AsString;
      Fdat_files[i].Extension := FQuery.FieldByName('extension').AsString;
      Fdat_files[i].Size := FQuery.FieldByName('size').AsInteger;
      Fdat_files[i].FileType := StrToInt('$'+FQuery.FieldByName('contenttype').AsString);
      Fdat_files[i].DatAddr := 0;
      Inc(i);
      FQuery.Next;
    until FQuery.EOF;
  end;
  FQuery.Close;

  FQuery.SQL.Text :=
    'SELECT extension,count(extension) AS x FROM datfiles GROUP BY extension ORDER BY extension ASC;';
  FQuery.Open;
  SetLength(Fdat_extensionsmap, FQuery.RecordCount);
  if FQuery.RecordCount > 0 then
  begin
    i := 0;
    repeat
      temps := FQuery.FieldByName('extension').AsString;
      Fdat_extensionsmap[i].Extension[3] := temps[1];
      Fdat_extensionsmap[i].Extension[2] := temps[2];
      Fdat_extensionsmap[i].Extension[1] := temps[3];
      Fdat_extensionsmap[i].Extension[0] := temps[4];
      Fdat_extensionsmap[i].ExtCount := FQuery.FieldByName('x').AsInteger;
      Inc(i);
      FQuery.Next;
    until FQuery.EOF;
  end;
  FQuery.Close;
end;



function TAccess_OUP_ADB.GetLinksToFile(FileID: Integer): TLinks;
var
  i: Integer;
begin
  SetLength(Result.ByName, 0);
  FQuery.SQL.Text := 'SELECT src_link_offset, src_id FROM linkmap WHERE target_id = ' + IntToStr(FileID) + ' ORDER BY src_id ASC;';
  FQuery.Open;
  SetLength(Result.ByID, FQuery.RecordCount);
  if FQuery.RecordCount > 0 then
  begin
    i := 0;
    repeat
      Result.ByID[i].SrcOffset := FQuery.FieldByName('src_link_offset').AsInteger;
      Result.ByID[i].Destination := FQuery.FieldByName('src_id').AsInteger;
      Inc(i);
      FQuery.Next;
    until FQuery.EOF;
  end;
  FQuery.Close;
end;



function TAccess_OUP_ADB.GetFileInfo(fileid: Integer): TFileInfo;
begin
  if fileid = -1 then
  begin
    Result := inherited GetFileInfo(fileid);
    Exit;
  end;
  if fileid < Self.GetFileCount then
    Result    := Fdat_files[fileid]
  else
    Result.ID := -1;
end;




function TAccess_OUP_ADB.GetFilesList(ext: String; pattern: String;
  NoEmptyFiles: Boolean; SortType: TSortType): TStrings;
var
  i:      Integer;
  list:   TStringList;
  id, name, extension: String;
  fields: TStrings;

  procedure getfields;
  begin
    fields.CommaText := StringReplace(AnsiQuotedStr(list.Strings[i], '"'), ';', '","', [rfReplaceAll]);
    if SortType in [ST_IDAsc, ST_IDDesc] then
    begin
      id := fields.Strings[0];
      name := fields.Strings[1];
      extension := fields.Strings[2];
    end;
    if SortType in [ST_NameAsc, ST_NameDesc] then
    begin
      id := fields.Strings[1];
      name := fields.Strings[0];
      extension := fields.Strings[2];
    end;
    if SortType in [ST_ExtAsc, ST_ExtDesc] then
    begin
      id := fields.Strings[1];
      name := fields.Strings[2];
      extension := fields.Strings[0];
    end;
    if SortType in [ST_ExtNameAsc, ST_ExtNameDesc] then
    begin
      id := fields.Strings[2];
      name := fields.Strings[1];
      extension := fields.Strings[0];
    end;
  end;

begin
  list := TStringList.Create;
  list.Sorted := True;
  for i := 0 to GetFileCount - 1 do
  begin
    if ((Length(ext) = 0) or (Pos(Fdat_files[i].Extension, ext) > 0)) and
      ((Length(pattern) = 0) or
      (Pos(UpperCase(pattern), UpperCase(Fdat_files[i].Name)) > 0)) then
    begin
      if (NoEmptyFiles = False) or ((Fdat_files[i].FileType and $02) = 0) then
      begin
        id := FormatNumber(Fdat_files[i].ID, 5, '0');
        name := Fdat_files[i].Name;
        extension := Fdat_files[i].Extension;

        case SortType of
          ST_IDAsc, ST_IDDesc:     list.Add(id + ';' + name + ';' + extension);
          ST_NameAsc, ST_NameDesc: list.Add(name + ';' + id + ';' + extension);
          ST_ExtAsc, ST_ExtDesc:   list.Add(extension + ';' + id + ';' + name);
          ST_ExtNameAsc, ST_ExtNameDesc: list.Add(extension + ';' + name + ';' + id);
        end;
      end;
    end;
  end;
  if not Assigned(Result) then
    Result := TStringList.Create;
  if list.Count > 0 then
  begin
    fields := TStringList.Create;
    if SortType in [ST_IDAsc, ST_NameAsc, ST_ExtAsc, ST_ExtNameAsc] then
      for i := 0 to list.Count - 1 do
      begin
        getfields;
        Result.Add(id + '-' + name + '.' + extension);
      end
    else
      for i := list.Count - 1 downto 0 do
      begin
        getfields;
        Result.Add(id + '-' + name + '.' + extension);
      end;
    fields.Free;
  end;
  list.Free;
end;




function TAccess_OUP_ADB.GetFileCount: Integer;
begin
  Result := Length(Fdat_files);
end;


function TAccess_OUP_ADB.GetExtensionsList(ExtListFormat: TExtensionFormat): TStrings;
var
  i: Integer;
begin
  if not Assigned(Result) then
    Result := TStringList.Create;
  if Result is TStringList then
    TStringList(Result).Sorted := True;
  for i := 0 to Length(Fdat_extensionsmap) - 1 do
  begin
    with Fdat_extensionsmap[i] do
    begin
      case ExtListFormat of
        EF_ExtOnly:
          Result.Add(Extension[3] + Extension[2] + Extension[1] + Extension[0]);
        EF_ExtCount:
          Result.Add(Extension[3] + Extension[2] + Extension[1] + Extension[0] +
                ' (' + IntToStr(ExtCount) + ')');
      end;
    end;
  end;
end;


procedure TAccess_OUP_ADB.LoadDatFile(FileID: Integer; var Target: TStream);
var
  mem: TStream;
  streampos: Integer;
begin
  if fileid < GetFileCount then
  begin
    if not Assigned(Target) then
      Target := TMemoryStream.Create;

    streampos := Target.Position;

    FQuery.SQL.Text := 'SELECT data FROM datfiles WHERE id=' + IntToStr(fileid) + ';';
    FQuery.Open;
    if FQuery.RecordCount > 0 then
    begin
      mem := FQuery.CreateBlobStream(FQuery.FieldByName('data'), bmRead);
      mem.Seek(0, soFromBeginning);
      Target.CopyFrom(mem, mem.Size);
      mem.Free;
    end;
    FQuery.Close;

    Target.Seek(streampos, soFromBeginning);
  end;
end;

procedure TAccess_OUP_ADB.UpdateDatFile(FileID: Integer; Src: TStream);
var
  MimeCoder: TStringFormat_MIME64;
  mem: TMemoryStream;
begin
  if fileid < GetFileCount then
  begin
    mimecoder := TStringFormat_MIME64.Create;
    mem := TMemoryStream.Create;
    mem.CopyFrom(Src, Src.Size); 
    FQuery.SQL.Text := 'UPDATE datfiles SET data=MimeToBin("' +
      MimeCoder.StrTo(mem.Memory, mem.Size) + '"), size=' + IntToStr(mem.Size) +
      ' WHERE id=' + IntToStr(fileid) + ';';
    FQuery.ExecSQL;
    mem.Free;
    mimecoder.Free;
  end;
end;



procedure TAccess_OUP_ADB.LoadDatFilePart(FileID, Offset, Size: Integer; var Target: TStream);
var
  streampos: Integer;
  mem: TStream;
begin
  if fileid < GetFileCount then
  begin
    if not Assigned(Target) then
      Target := TMemoryStream.Create;
    streampos := Target.Position;

    FQuery.SQL.Text := 'SELECT data FROM datfiles WHERE id=' + IntToStr(fileid) + ';';
    FQuery.Open;
    if FQuery.RecordCount > 0 then
    begin
      mem := FQuery.CreateBlobStream(FQuery.FieldByName('data'), bmRead);
      mem.Seek(offset, soFromBeginning);
      Target.CopyFrom(mem, size);
      mem.Free;
    end;
    FQuery.Close;
    Target.Seek(streampos, soFromBeginning);
  end;
end;



procedure TAccess_OUP_ADB.UpdateDatFilePart(FileID, Offset, Size: Integer; Src: TStream);
var
  MimeCoder: TStringFormat_MIME64;
  mem:  TMemoryStream;
begin
  if fileid < GetFileCount then
  begin
    mem := nil;
    LoadDatFile(fileid, TStream(mem));
    mem.Seek(Offset, soFromBeginning);
    mem.CopyFrom(Src, Size);
    mem.Seek(0, soFromBeginning);
    mimecoder := TStringFormat_MIME64.Create;
    FQuery.SQL.Text := 'UPDATE datfiles SET data=MimeToBin("' +
      MimeCoder.StrTo(mem.Memory, mem.Size) + '") WHERE id=' + IntToStr(fileid) + ';';
    FQuery.ExecSQL;
    mem.Free;
    mimecoder.Free;
  end;
end;



function TAccess_OUP_ADB.GetDatLink(FileID, DatOffset: Integer): TDatLink;
begin
  Result := DatLinksManager.GetDatLink(FConnectionID, FileID, DatOffset);
  FQuery.SQL.Text := 'SELECT target_id FROM linkmap WHERE src_id = ' + IntToStr(FileID) + ' and src_link_offset = ' + IntToStr(DatOffset) + ';';
  FQuery.Open;
  if FQuery.RecordCount > 0 then
    Result.DestID := FQuery.FieldByName('target_id').AsInteger;
  FQuery.Close;
end;


function TAccess_OUP_ADB.GetDatLinks(FileID: Integer): TDatLinkList;
var
  i: Integer;
  SrcOffset, DestID: Integer;
begin
  Result := DatLinksManager.GetDatLinks(FConnectionID, FileID);
  if Length(Result) > 0 then
  begin
    FQuery.SQL.Text := 'SELECT src_link_offset, target_id FROM linkmap WHERE src_id = ' + IntToStr(FileID) + ' ORDER BY src_link_offset ASC;';
    FQuery.Open;
    if FQuery.RecordCount > 0 then
    begin
      repeat
        SrcOffset := FQuery.FieldByName('src_link_offset').AsInteger;
        DestID := FQuery.FieldByName('target_id').AsInteger;
        for i := 0 to High(Result) do
          if Result[i].SrcOffset = SrcOffset then
            Break;
        if i < Length(Result) then
          Result[i].DestID := DestID
        else
          Result[i].DestID := -1;
        FQuery.Next;
      until FQuery.EOF;
    end;
    FQuery.Close;
  end;
end;


function TAccess_OUP_ADB.GetRawList(FileID: Integer): TRawDataList;
var
  i: Integer;
begin
  SetLength(Result, 0);
  FQuery.SQL.Text := 'SELECT [src_link_offset],[size],[sep] FROM rawmap WHERE [src_id]=' +
    IntToStr(fileid) + ' ORDER BY src_link_offset ASC;';
  FQuery.Open;
  if FQuery.RecordCount > 0 then
  begin
    FQuery.First;
    SetLength(Result, FQuery.RecordCount);
    i := 0;
    repeat
      Result[i].SrcID     := fileid;
      Result[i].SrcOffset := FQuery.FieldByName('src_link_offset').AsInteger;
      Result[i].RawAddr   := 0;
      Result[i].RawSize   := FQuery.FieldByName('size').AsInteger;
      Result[i].LocSep    := FQuery.FieldByName('sep').AsBoolean;
      Inc(i);
      FQuery.Next;
    until FQuery.EOF;
  end;
  FQuery.Close;
end;


function TAccess_OUP_ADB.GetRawInfo(FileID, DatOffset: Integer): TRawDataInfo;
var
  i: Integer;
  rawlist: TRawDataList;
begin
  rawlist := GetRawList(FileID);
  if Length(rawlist) > 0 then
  begin
    for i := 0 to High(rawlist) do
      if rawlist[i].SrcOffset = DatOffset then
        Break;
    if i < Length(rawlist) then
      Result := rawlist[i]
    else begin
      Result.SrcID     := -1;
      Result.SrcOffset := -1;
      Result.RawAddr   := -1;
      Result.RawSize   := -1;
    end;
  end;
end;



procedure TAccess_OUP_ADB.LoadRawFile(FileID, DatOffset: Integer; var Target: TStream);
var
  mem: TStream;
  streampos: Integer;
begin
  if fileid < GetFileCount then
  begin
    if not Assigned(Target) then
      Target := TMemoryStream.Create;
    streampos := Target.Position;
    FQuery.SQL.Text := 'SELECT data FROM rawmap WHERE (src_id=' +
      IntToStr(FileID) + ') AND (src_link_offset=' + IntToStr(DatOffset) + ');';
    FQuery.Open;
    if FQuery.RecordCount > 0 then
    begin
      mem := FQuery.CreateBlobStream(FQuery.FieldByName('data'), bmRead);
      mem.Seek(0, soFromBeginning);
      Target.CopyFrom(mem, mem.Size);
      mem.Free;
    end;
    FQuery.Close;
    Target.Seek(streampos, soFromBeginning);
  end;
end;


procedure TAccess_OUP_ADB.UpdateRawFile(FileID, DatOffset: Integer; Src: TStream);
var
  MimeCoder: TStringFormat_MIME64;
  mem: TMemoryStream;
begin
  if fileid < GetFileCount then
  begin
    mimecoder := TStringFormat_MIME64.Create;
    mem := TMemoryStream.Create;
    mem.CopyFrom(Src, Src.Size);
    mem.Seek(0, soFromBeginning);
    FQuery.SQL.Text := 'UPDATE rawmap SET data=MimeToBin("' + MimeCoder.StrTo(
      mem.Memory, mem.Size) + '") WHERE (src_id=' + IntToStr(FileID) +
      ') AND (src_link_offset=' + IntToStr(DatOffset) + ');';
    FQuery.ExecSQL;
    mem.Free;
    mimecoder.Free;
  end;
end;




procedure TAccess_OUP_ADB.LoadRawFilePart(FileID, DatOffset, Offset, Size: Integer; var Target: TStream);
var
  mem:  TMemoryStream;
  streampos: Integer;
begin
  if fileid < GetFileCount then
  begin
    if not Assigned(Target) then
      Target := TMemoryStream.Create;
    streampos := Target.Position;
    mem := nil;
    LoadRawFile(FileID, DatOffset, TStream(mem));
    mem.Seek(Offset, soFromBeginning);
    Target.CopyFrom(mem, Size);
    mem.Free;
    Target.Seek(streampos, soFromBeginning);
  end;
end;




procedure TAccess_OUP_ADB.UpdateRawFilePart(FileID, DatOffset, Offset, Size: Integer; Src: TStream);
var
  MimeCoder: TStringFormat_MIME64;
  mem:  TMemoryStream;
begin
  if fileid < GetFileCount then
  begin
    mem := nil;
    LoadRawFile(fileid, offset, TStream(mem));
    mem.Seek(offset, soFromBeginning);
    mem.CopyFrom(Src, Size);
    mem.Seek(0, soFromBeginning);
    mimecoder := TStringFormat_MIME64.Create;
    FQuery.SQL.Text := 'UPDATE rawmap SET data=MimeToBin("' + MimeCoder.StrTo(
      mem.Memory, mem.Size) + '") WHERE (src_id=' + IntToStr(fileid) +
      ') AND (src_link_offset=' + IntToStr(DatOffset) + ');';
    FQuery.ExecSQL;
    mem.Free;
    mimecoder.Free;
  end;
end;




end.