Dart

Load a MessageSet from a Compact String

Demonstrates the Chilkat MessageSet.FromCompactString method, which clears the set and loads message identifiers from compact IMAP message-set syntax. The only argument is the compact string: a colon specifies an inclusive ascending range, and commas separate values or ranges. This example loads 1:5,8:10 and prints the result as a comma-separated list.

Background: Compact message-set syntax is how IMAP itself expresses groups of messages — 1:5,8:10 is far more concise than listing every id. FromCompactString is the inverse of ToCompactString: it parses that text into a set you can pass to Imap methods. Duplicates are removed, identifiers are sorted ascending, and the existing HasUids setting is preserved. Note the string carries only the numbers — it does not record whether they are UIDs or sequence numbers.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the MessageSet.FromCompactString method, which loads a set of message
  // identifiers from compact IMAP message-set syntax.  The only argument is the compact string.
  // A colon specifies an inclusive range, and commas separate values or ranges.

  final msgSet = CkMessageSet();

  // Load a compact message set.  "1:5,8:10" expands to 1,2,3,4,5,8,9,10.
  try {
    msgSet.fromCompactString('1:5,8:10');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Count: ${msgSet.count}');

  // Show the loaded identifiers in comma-separated form.
  final csv = msgSet.toCommaSeparatedStr();
  print(csv);
}