letIterableOrNone<T extends Object> function

Option<Iterable<Option<T>>> letIterableOrNone<T extends Object>(
  1. dynamic input
)

Converts input to Iterable<Option<T>>, returning None on failure.

Supported types:

Implementation

Option<Iterable<Option<T>>> letIterableOrNone<T extends Object>(dynamic input) {
  if (input is Outcome) {
    return switch (input.rawSync().value) {
      Ok(value: final okValue) => letIterableOrNone(
        NoStackOverflowWrapper(okValue),
      ),
      Err() => const None(),
    };
  }
  return switch (input is NoStackOverflowWrapper ? input.value : input) {
    final Iterable<dynamic> i => Some(i.map((e) => letOrNone<T>(e))),
    final String s => jsonDecodeOrNone<Iterable<dynamic>>(
      s,
    ).map((i) => i.map((e) => letOrNone<T>(e))),
    _ => const None(),
  };
}