Pascal (Lazarus/Delphi)

Delete Email Individually (One at a time) from an IMAP Mailbox

Downloads email from an IMAP mailbox and deletes emails individually (one by one). Pascal (Lazarus/Delphi)

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.EmailBundle,
  Chilkat.Imap,
  Chilkat.Email,
  Chilkat.MessageSet;

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

procedure RunDemo;
var
  success: Boolean;
  imap: TImap;
  fetchUids: Boolean;
  messageSet: TMessageSet;
  bundle: TEmailBundle;
  headersOnly: Boolean;
  email: TEmail;
  i: Integer;
  numEmails: Integer;

begin
  success := False;

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

  imap := TImap.Create;

  //  Connect to an IMAP server.
  //  Use TLS
  imap.Ssl := True;
  imap.Port := 993;
  success := imap.Connect('imap.example.com');
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;

  //  Login
  success := imap.Login('myLogin','myPassword');
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;

  //  Select an IMAP mailbox
  success := imap.SelectMailbox('Inbox');
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;

  //  We can choose to fetch UIDs or sequence numbers.
  fetchUids := True;

  //  Get the message IDs of all the emails in the mailbox
  messageSet := TMessageSet.Create;
  success := imap.QueryMbx('ALL',fetchUids,messageSet);
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;

  //  Fetch the emails into a bundle object:
  bundle := TEmailBundle.Create;
  headersOnly := False;
  success := imap.FetchMsgSet(headersOnly,messageSet,bundle);
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;

  //  To mark a complete set of emails for deletion, call SetFlags:
  success := imap.SetFlags(messageSet,'Deleted',1);
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;

  //  Messages can also be marked for deletion individually:
  //  Loop over the bundle and mark each message for deletion.
  email := TEmail.Create;
  i := 0;
  numEmails := bundle.MessageCount;
  while i < numEmails do
    begin
      bundle.EmailAt(i,email);

      WriteLn(email.From);
      WriteLn(email.Subject);

      //  To delete this email, set the "Deleted" flag to 1.
      //  The email is not actually deleted until Expunge or
      //  ExpungeAndClose is called.
      success := imap.SetMailFlag(email,'Deleted',1);
      if (success = False) then
        begin
          WriteLn(imap.LastErrorText);
          Exit;
        end;

      WriteLn('--');

      i := i + 1;
    end;

  success := imap.ExpungeAndClose();
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;

  //  Disconnect from the IMAP server.
  success := imap.Disconnect();


  imap.Free;
  messageSet.Free;
  bundle.Free;
  email.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.