Fetch a Set of POP3 Messages by UIDL

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Demonstrates the Chilkat MailMan.FetchUidlSet method, which retrieves the messages whose UIDLs are listed in a StringTable and appends them to an EmailBundle. The arguments are the UIDL StringTable, headersOnly, numBodyLines, and the EmailBundle. This example fetches two specific messages by UIDL.

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the MailMan.FetchUidlSet method, which retrieves the messages whose UIDLs are
  // listed in a StringTable and appends them to an EmailBundle.  The arguments are the UIDL
  // StringTable, headersOnly, numBodyLines, and the EmailBundle.  The messages remain on the
  // server.

  final mailman = CkMailMan();

  // Configure the POP3 server connection.
  mailman.mailHost = 'pop.example.com';
  mailman.mailPort = 995;
  mailman.popSsl = true;
  mailman.popUsername = 'user@example.com';
  mailman.popPassword = 'myPassword';

  // Build the set of UIDLs to fetch.
  final uidls = CkStringTable();
  uidls.append('0000000123abcdef');
  uidls.append('0000000124abcdef');

  // Fetch the listed messages (full bodies) into a bundle.
  // headersOnly=false (fetch the entire message).
  // Note: numBodyLines only applies when headersOnly is true (it sets how many lines of the
  // body to include along with the headers).  When headersOnly is false, the entire message
  // is fetched and numBodyLines is ignored.
  final bundle = CkEmailBundle();

  try {
    mailman.fetchUidlSet(uidls, false, 0, bundle);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final n = bundle.messageCount;
  print('Fetched $n messages.');

  final email = CkEmail();
  for (var i = 0; i < n; i++) {
    bundle.emailAt(i, email);
    print(email.subject);
  }

  // Note: Explicitly connecting/authenticating is optional.  Chilkat MailMan automatically
  // connects and authenticates -- using the property settings above -- whenever a server
  // operation requires it.  Calling the explicit connect/authenticate methods can still be
  // helpful to determine whether a failure occurs while connecting or while authenticating.
}