# `PhoenixKit.Modules.Emails.EventTrackerRegistry`
[🔗](https://github.com/BeamLabEU/phoenix_kit_emails/blob/0.4.2/lib/phoenix_kit/modules/emails/event_tracker_registry.ex#L1)

Emails-local registry of `EventTracker` implementations — decision §9.2
(option B) of the universalization spec: trackers all live in
`phoenix_kit_emails` today (Mailgun would too), so a compile-time list
here is simpler than a core module-registry callback for a cross-module
need that doesn't exist yet. Revisit only if a tracker must ship from a
different package.

Adding a provider (e.g. Mailgun) is: implement `EventTracker`, add the
module here. `EventTrackerReconciler` and the admin panel (the
"Delivery event tracking" settings section) pick it up automatically —
no other wiring.

## The admin panel also expects a duck-typed "Manager API"

A registered tracker module today is also its own Manager
(`SQSPollingManager`, `BrevoPollingManager`) — the admin panel calls a
few more functions on it that are **not** part of the formal
`EventTracker` behaviour (spec §3's "Manager API shared shape" was
always informal, this just extends that same convention):

- `enable_polling/0`, `disable_polling/0` — the Tracking toggle.
- `poll_now/0` — the Poll now action (forced one-off cycle, still
  respects `Emails.enabled?/0`).
- `set_polling_interval/1` — the per-tracker interval editor.

`integration_count/0`, `accounts/0`, `toggle_account_polling/1` and
`last_polled_at/0` ARE part of the formal `EventTracker` behaviour,
but declared `@optional_callbacks` — the panel never calls a tracker
module directly for these; it always goes through `EventTracker.
integration_count/1` / `accounts/1` / `toggle_account_polling/2` /
`last_polled_at/1`, which fall back to a safe default (or a no-op)
when a tracker skips them, so a Mailgun implementation that forgets
the Accounts-column extras can never crash the panel. See
`EventTracker`'s own moduledoc for the exact defaults.

# `trackers`

```elixir
@spec trackers() :: [module()]
```

Every registered `EventTracker` module.

---

*Consult [api-reference.md](api-reference.md) for complete listing*