applyOps method

Fugue<T> applyOps(List<FugueOp<T>> ops, LamportClock clk)

Apply a batch of ops locally (minting dots from clk) and return the DELTA to ship to peers: the blocks created or grown by this batch, at their final state.

Because each delta block keeps its original start dot, a peer's join extends the matching block by max-length and OR-merges tombstones — it never creates a second node for an element already implied by a run, so the delta is a well-formed δ-state fragment.

Implementation

Fugue<T> applyOps(List<FugueOp<T>> ops, LamportClock clk) {
  final touched = <Dot>{};
  for (final op in ops) {
    switch (op) {
      case FugueInsert<T>(:final at, :final value):
        touched.add(insert(at, value, clk.tick()));
      case FugueRemoveAt<T>(:final at):
        final s = delete(at);
        if (s != null) touched.add(s);
    }
  }
  final delta = Fugue<T>();
  for (final start in touched) {
    final b = _blocks[start];
    if (b == null) continue;
    final nb = _Block<T>(b.start, b.parent, b.side, List<T>.of(b.values));
    nb.deleted.addAll(b.deleted);
    delta._index(nb);
  }
  return delta;
}