program txt2pdf;

{$mode objfpc}{$H+}

uses
  Classes, SysUtils, CustApp, fpreport, fpreportpdfexport, fpTTF,
  fpreportstreamer, fpjson, jsonparser;

type

  { TPrintApplication }

  TPrintApplication = class(TCustomApplication)
  private
    FReport : TFPReport;
    FLines : TStringList;
    FData : TFPReportUserData;
    FLineIndex : Integer;
    procedure DoFirst(Sender: TObject);
    procedure DoGetEOF(Sender: TObject; var IsEOF: boolean);
    procedure DoGetNames(Sender: TObject; List: TStrings);
    procedure DoGetNext(Sender: TObject);
    procedure DoGetValue(Sender: TObject; const AValueName: string; var AValue: variant);
  protected
    procedure DoRun; override;
  public
    Constructor Create(AOwner : TComponent); override;
    Destructor destroy; override;
  end;

{ TPrintApplication }

procedure TPrintApplication.DoGetNames(Sender: TObject; List: TStrings);
begin
  List.Add('Line');
end;

procedure TPrintApplication.DoGetEOF(Sender: TObject; var IsEOF: boolean);
begin
  isEOF:=FLineIndex>=FLines.Count;
end;

procedure TPrintApplication.DoFirst(Sender: TObject);
begin
  FLineIndex:=0;
end;

procedure TPrintApplication.DoGetNext(Sender: TObject);
begin
  Inc(FLineIndex);
end;

procedure TPrintApplication.DoGetValue(Sender: TObject; const AValueName: string; var AValue: variant);
begin
  Avalue:=FLines[FLineIndex];
end;

procedure TPrintApplication.DoRun;

Var
  PG : TFPReportPage;
  PH : TFPReportPageHeaderBand;
  PF : TFPReportPageFooterBand;
  DB : TFPReportDataBand;
  M : TFPReportMemo;
  PDF : TFPReportExportPDF;
  Fnt : String;

begin
  Fnt:='DejaVuSans';
  Terminate;
  FLines.LoadFromFile(ParamStr(1));
  gTTFontCache.ReadStandardFonts;
  gTTFontCache.BuildFontCache;
  PaperManager.RegisterStandardSizes;
  // Page
  PG:=TFPReportPage.Create(FReport);
  PG.Data:=FData;
  PG.Orientation := poPortrait;
  PG.PageSize.PaperName := 'A4';
  PG.Margins.Left := 15;
  PG.Margins.Top := 15;
  PG.Margins.Right := 15;
  PG.Margins.Bottom := 15;
  // Page header
  PH:=TFPReportPageHeaderBand.Create(PG);
  PH.Layout.Height:=10; // 1 cm.
  M:=TFPReportMemo.Create(PH);
  M.Layout.Top:=1;
  M.Layout.Left:=1;
  M.Layout.Width:=120;
  M.Layout.Height:=7;
  M.Text:=ParamStr(1);
  M.Font.Name:=Fnt;
  M.Font.Size:=10;
  M:=TFPReportMemo.Create(PH);
  M.Layout.Top:=1;
  M.Layout.Left:=PG.Layout.Width-41;
  M.Layout.Width:=40;
  M.Layout.Height:=7;
  M.Text:='[Date]';
  M.Font.Name:=Fnt;
  M.Font.Size:=10;
  // Page footer
  PF:=TFPReportPageFooterBand.Create(PG);
  PF.Layout.Height:=10; // 1 cm.
  M:=TFPReportMemo.Create(PF);
  M.Layout.Top:=1;
  M.Layout.Left:=1;
  M.Layout.Width:=40;
  M.Layout.Height:=7;
  M.Text:='Page [PageNo]';
  M.Font.Name:=Fnt;
  M.Font.Size:=10;
  // Actual line
  DB:=TFPReportDataBand.Create(PG);
  DB.Data:=FData;
  DB.Layout.Height:=5; // 0.5 cm.
  DB.StretchMode:=smActualHeight;
  M:=TFPReportMemo.Create(DB);
  M.Layout.Top:=1;
  M.Layout.Left:=1;
  M.Layout.Width:=PG.Layout.Width-41;
  M.Layout.Height:=4;
  M.Text:='[Line]';
  M.StretchMode:=smActualHeight;
  M.Font.Name:=Fnt;
  M.Font.Size:=10;
  // Set up data
  FData.OnGetNames:=@DoGetNames;
  FData.OnNext:=@DoGetNext;
  FData.OnGetValue:=@DoGetValue;
  FData.OnGetEOF:=@DoGetEOF;
  FData.OnFirst:=@DoFirst;
  // Go !
  FReport.RunReport;
  PDF:=TFPReportExportPDF.Create(Self);
  try
    PDF.FileName:=ChangeFileExt(Paramstr(1),'.pdf');
    FReport.RenderReport(PDF);
  finally
    PDF.Free;
  end;
end;

constructor TPrintApplication.Create(AOwner: TComponent);

begin
  Inherited;
  FReport:=TFPReport.Create(Self);
  FLines:=TStringList.Create;
  FData:=TFPReportUserData.Create(Self);
end;

destructor TPrintApplication.destroy;
begin
  FreeAndNil(FData);
  FreeAndNil(FLines);
  FreeAndNil(FReport);
  inherited destroy;
end;

var
  Application: TPrintApplication;
begin
  Application:=TPrintApplication.Create(nil);
  Application.Title:='Print File Application';
  Application.Run;
  Application.Free;
end.