Struct BrainWaveTracker 

pub struct BrainWaveTracker {
    pub config: BrainWaveConfig,
    /* private fields */
}

Tracks event timestamps and computes the current brain-wave state.

Uses a ring buffer of timestamps — no extra thread, no polling. Update is ~10ns (atomic push to ring buffer).

Fields

config: BrainWaveConfig

Configuration for state transitions

Implementations

impl BrainWaveTracker

pub fn new(config: BrainWaveConfig) -> Self

Create a new tracker with the given config.

pub fn record_event(&mut self) -> BrainWave

Record an event and update the brain-wave state.

pub fn recompute(&mut self, now: Instant) -> BrainWave

Recompute the current state without recording an event. Called when checking state after a timer fires.

pub const fn current(&self) -> BrainWave

Current brain-wave state.

pub fn next_transition_duration(&self) -> Duration

Compute how long to sleep before the next state transition would occur.

Returns Duration::MAX if no transition is pending (e.g., Delta with no scheduled tasks). The caller should use this in a tokio::select! branch alongside stdin readiness.

pub fn idle_duration(&self) -> Duration

Time since the last event was recorded.