Rust

Get MessageSet IDs as a Compact String

Demonstrates the Chilkat MessageSet.ToCompactString method, which returns the unique identifiers in ascending order using compact IMAP message-set syntax, collapsing consecutive runs into inclusive ranges. It takes no arguments. This example loads 1,2,3,4,5,8,9,10 and prints the compact form 1:5,8:10.

Background: The result is canonical for the current set — unique, sorted, and range-compacted — which is the compact notation IMAP servers expect for message-set arguments. It is the inverse of FromCompactString, so the two round-trip: a set emitted here can be reloaded later. The string contains only numbers and omits the HasUids setting, so track UID-vs-sequence separately.

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Rust


// Demonstrates the MessageSet.ToCompactString method, which returns the unique identifiers in
// ascending order using compact IMAP message-set syntax, with consecutive runs collapsed into
// inclusive ranges.  It takes no arguments.

let msg_set = chilkat::MessageSet::new();

// Load a set of individual identifiers.
if msg_set.from_compact_string("1,2,3,4,5,8,9,10").is_err() {
    println!("{}", msg_set.last_error_text());
    return;
}

// Get the canonical compact representation.
let compact = msg_set.to_compact_string().unwrap_or_default();
println!("{}", compact);
// Output: 1:5,8:10