unit CustomDoc;

interface

uses
  Classes,
  SysUtils;

type
  TProjectFile = class(TComponent)
  private
    FID: Integer;
    FNewID: Integer;
    FFlag: Integer;
    FGatherID: Integer;
    FProjName: string;
    FFullPath: string;
  public
    property NewID: Integer read FNewID write FNewID;
    property FullPath: string read FFullPath write FFullPath;
  published
    property ID: Integer read FID write FID;
    property Flag: Integer read FFlag write FFlag;
    property GatherID: Integer read FGatherID write FGatherID;
    property ProjName: string read FProjName write FProjName;
  end;

  TAddProjectProc = procedure (aProjFile: TProjectFile; aProjList: TList;
                               var aFullPath: string) of object;

  TCustomProjectDoc = class
  public
    class procedure ImportProjects(const aFileName: string; aAddProc: TAddProjectProc);
    class procedure ExportProjects(const aFileName: string; aFileList: TList);
  end;

implementation

{ TCustomProjectDoc }

class procedure TCustomProjectDoc.ExportProjects(const aFileName: string;
  aFileList: TList);
var
  iValue: Integer;
  iLoop: Integer;
  strFilePath: string;
  ProjFile: TProjectFile;
  FileStream: TFileStream;
  ProjectStream: TFileStream;
begin
  FileStream := TFileStream.Create(aFileName, fmCreate);
  try
    iValue := aFileList.Count;
    // 文件个数
    FileStream.Write(iValue, SizeOf(iValue));
    for iLoop := 0 to aFileList.Count - 1 do
    begin
      ProjFile := TProjectFile(aFileList.List^[iLoop]);
      strFilePath := ProjFile.FullPath;
      // 项目信息
      FileStream.WriteComponent(ProjFile);
      // 文件大小
      ProjectStream := TFileStream.Create(ProjFile.FullPath, fmOpenRead);
      iValue := ProjectStream.Size;
      FileStream.Write(iValue, SizeOf(iValue));
      // 文件内容
      FileStream.CopyFrom(ProjectStream, iValue);
      ProjectStream.Free;
    end;
  finally
    FileStream.Free;
  end;
end;

class procedure TCustomProjectDoc.ImportProjects(const aFileName: string; aAddProc: TAddProjectProc);
var
  iValue: Integer;
  iLoop: Integer;
  ProjList: TList;
  iFileSize: Integer;
  strFilePath: string;
  ProjFile: TProjectFile;
  FileStream: TFileStream;
  ProjectStream: TFileStream;
begin
  ProjList := TList.Create;
  FileStream := TFileStream.Create(aFileName, fmOpenRead);
  try
    // 文件个数
    FileStream.Read(iValue, SizeOf(iValue));
    for iLoop := 0 to iValue - 1 do
    begin
      //  项目信息
      ProjFile := TProjectFile.Create(nil);
      FileStream.ReadComponent(ProjFile);
      aAddProc(ProjFile, ProjList, strFilePath);
      // 文件大小
      FileStream.Read(iFileSize, SizeOf(iFileSize));
      // 文件内容
      ProjectStream := TFileStream.Create(strFilePath, fmCreate);
      ProjectStream.CopyFrom(FileStream, iFileSize);
      ProjectStream.Free;
    end;
  finally
    FileStream.Free;
    for iLoop := 0 to ProjList.Count - 1 do
      TProjectFile(ProjList.List^[iLoop]).Free;
    ProjList.Free;
  end;
end;

end.