PDF Placeholders with Other Delimiters: [[name]]

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Pdf,
  Chilkat.JsonObject;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  pdf: TPdf;
  json: TJsonObject;
  jsonOut: TJsonObject;
  i: Integer;
  count_i: Integer;

begin
  success := False;

  //  This example requires the Chilkat API to have been previously unlocked.
  //  See Global Unlock Sample for sample code.

  //  The PDF used in this example is available at letter_template.pdf

  pdf := TPdf.Create;
  success := pdf.LoadFile('qa_data/pdf/letter_template.pdf');
  if (success = False) then
    begin
      WriteLn(pdf.LastErrorText);
      Exit;
    end;

  //  The letter reads: "Dear [[name]]," ... "expires on [[expiry]]" ... "[[amount]] per year" ... "[[agent]]".
  json := TJsonObject.Create;
  json.UpdateString('placeholderSyntax','[[name]]');
  json.UpdateString('placeholders.date','October 18, 2026');
  json.UpdateString('placeholders.name','Ms. Rivera');
  json.UpdateString('placeholders.expiry','December 31, 2026');
  json.UpdateString('placeholders.amount','$299.00');
  json.UpdateString('placeholders.agent','Dana Whitfield, Account Manager');

  jsonOut := TJsonObject.Create;
  success := pdf.TextReplace('apply',json,jsonOut);
  if (success = False) then
    begin
      WriteLn('Not applied: ' + jsonOut.Emit());
      if (success = False) then
        begin
          WriteLn(pdf.LastErrorText);
          Exit;
        end;
    end;

  i := 0;
  count_i := jsonOut.SizeOfArray('replacements');
  while i < count_i do
    begin
      jsonOut.I := i;
      WriteLn('[[' + jsonOut.StringOf('replacements[i].field') + ']] replaced');
      i := i + 1;
    end;

  success := pdf.WriteFile('qa_output/letter_rivera.pdf');
  if (success = False) then
    begin
      WriteLn(pdf.LastErrorText);
      Exit;
    end;

  //  Sample output:

  //  [[date]] replaced
  //  [[name]] replaced
  //  [[expiry]] replaced
  //  [[amount]] replaced
  //  [[agent]] replaced


  pdf.Free;
  json.Free;
  jsonOut.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.