Lazarus Pascal

Date/Time Older-Than N Seconds/Minutes/Hours/Days

Demonstrates the how to tell if a date/time is older than the current time by N seconds, minutes, hours, or days. 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));

  //  Subtract 10 minutes, making the date 10 minutes in the past.
  dt.AddSeconds(-600);
  WriteLn('10 minutes ago: ' + dt.GetAsTimestamp(True));

  //  Is the date/time older than 10 seconds?
  b := dt.OlderThan(10,'seconds');
  WriteLn('Older than 10 seconds: ' + b);

  //  Is the date/time older than 5 minutes?
  b := dt.OlderThan(5,'minutes');
  WriteLn('Older than 5 minutes: ' + b);

  //  Is the date/time older than 15 minutes?
  b := dt.OlderThan(15,'minutes');
  WriteLn('Older than 15 minutes: ' + b);

  //  Is the date/time older than 1 hour?
  b := dt.OlderThan(1,'hour');
  WriteLn('Older than 1 hour: ' + b);

  //  Is the date/time older than 1 day?
  b := dt.OlderThan(1,'day');
  WriteLn('Older than 1 day: ' + b);

  //  Output:

  //  	Now: 2017-05-05T23:33:06-0500
  //  	10 minutes ago: 2017-05-05T23:23:06-0500
  //  	Older than 10 seconds: True
  //  	Older than 5 minutes: True
  //  	Older than 15 minutes: False
  //  	Older than 1 hour: False
  //  	Older than 1 day: False


  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.