Struct DevicePoller 

pub struct DevicePoller { /* private fields */ }

Polls the system audio device inventory at a fixed interval and reports connectivity changes as human-readable event strings.

Created once and polled repeatedly. The first DevicePoller::poll after interval has elapsed performs the expensive CPAL enumeration; calls before that return None immediately.

Consumers:

• TUI: call poll() every tick (50 ms); the poller internally rate-limits.
• Dashboard API: call poll() in a tokio::time::interval task.

Implementations

impl DevicePoller

pub fn new(interval: Duration) -> Self

Create a poller with the given minimum interval between CPAL queries.

On creation, immediately takes a baseline snapshot so the first poll() only reports changes that happen after construction.

pub fn poll(&mut self) -> Option<Vec<String>>

Check for device changes. Returns Some(events) if devices were added, removed, or changed since the last check (subject to interval rate-limiting), or None if nothing changed or the interval hasn’t elapsed yet.

pub fn snapshot(&self) -> &DevicesResponse

The most recent device inventory snapshot (cached, does not query CPAL).