Enum Command 

pub enum Command {
    Subscribe {
        underlying: String,
        expiration: ExpirationDate,
    },
    Unsubscribe {
        underlying: String,
        expiration: ExpirationDate,
    },
    Reconnect,
    Rediscover,
    ReloadBundle(PathBuf),
}

A render-loop -> data-layer command (§4).

Emitted by a fold that needs I/O so the handler itself stays pure and fast: the async data layer performs the actual subscribe / reconnect / bundle work. It rides the app’s bounded, small command channel; a send is non-blocking and never awaited (docs/02-tui-architecture.md §4, §5).

PartialEq/Eq are intentionally not derived: ExpirationDate does not implement them, and modelling the subscribe payloads exactly as docs/02-tui-architecture.md §4 specifies (an ExpirationDate, not a pre-resolved instant) is worth more than value-comparability — tests pattern-match on the received command instead.

Variants

Subscribe

Live: open the streams for one (underlying, expiration).

Fields

underlying: String

The canonical upper-case underlying ticker.

expiration: ExpirationDate

The expiration to subscribe.

Unsubscribe

Live: drop the subscription for one (underlying, expiration).

Fields

underlying: String

The canonical upper-case underlying ticker.

expiration: ExpirationDate

The expiration to unsubscribe.

Reconnect

Live: provider-driven recovery — reconnect the active stream (r).

Rediscover

Live: mode reload — re-run discover + fetch for the active provider (R).

ReloadBundle(PathBuf)

Replay: re-open and revalidate the bundle at the directory (R). Seeking is not a command: with the whole bundle loaded (#33) a scrub is an in-memory cursor move folded directly by AppEvent::ReplaySeek, never a round-trip to the data layer.

Trait Implementations

impl Clone for Command

fn clone(&self) -> Command

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Command

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.