Lazarus Pascal

Date/Time Expires Within N Seconds/Minutes/Hours/Days

Demonstrates the how to tell if a date/time is within N seconds, minutes, hours, or days of the current system time. Lazarus Pascal

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.CkDateTime;

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

procedure RunDemo;
var
  dt: TCkDateTime;
  b: Boolean;

begin
  dt := TCkDateTime.Create;

  //  Set to the current system date/time.
  dt.SetFromCurrentSystemTime();
  WriteLn('Now: ' + dt.GetAsTimestamp(True));

  //  Add 10 minutes, making the date 10 minutes in the future.
  dt.AddSeconds(600);
  WriteLn('10 minutes from now: ' + dt.GetAsTimestamp(True));

  //  Is the date/time within 10 seconds of expiration (i.e. within 10 seconds of now)?
  b := dt.ExpiresWithin(10,'seconds');
  WriteLn('Expires within 10 seconds: ' + b);

  //  Does the date/time expire within 5 minutes?
  b := dt.ExpiresWithin(5,'minutes');
  WriteLn('Expires within 5 minutes: ' + b);

  //  Does the date/time expire within 15 minutes?
  b := dt.ExpiresWithin(15,'minutes');
  WriteLn('Expires within 15 minutes: ' + b);

  //  Does the date/time expire within 1 hour?
  b := dt.ExpiresWithin(1,'hour');
  WriteLn('Expires within 1 hour: ' + b);

  //  Does the date/time expire within 1 day?
  b := dt.ExpiresWithin(1,'day');
  WriteLn('Expires within 1 day: ' + b);

  //  Output:

  //  	Now: 2017-05-05T23:48:00-0500
  //  	10 minutes from now: 2017-05-05T23:58:00-0500
  //  	Expires within 10 seconds: False
  //  	Expires within 5 minutes: False
  //  	Expires within 15 minutes: True
  //  	Expires within 1 hour: True
  //  	Expires within 1 day: True


  dt.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.