# `MishkaCmsCore.Runtime.Workers.ShareCardSweepWorker`
[🔗](https://github.com/mishka-group/mishka_cms_core/blob/v0.0.1/lib/mishka_cms_core/runtime/workers/share_card_sweep_worker.ex#L5)

Deletes the share cards of a site that no page shows any more: the planner
(`MishkaCmsCore.Runtime.Workers.ShareCardPlanWorker`) queues one, on `:share_cards`, after it has
queued a look at every card of the site, with the time it started as `since`.

Every look marks the card files its pages show (`MishkaCmsCore.Runtime.ShareCard.keep/2`), and a
card drawn by a look is written after `since`. So once the looks have run, a file in the site's
share folder (`MishkaCmsCore.Runtime.ShareCard.dir/1`) last written before `since` is one no page
names: a card drawn for data that has changed since. Those are deleted, with any `.part` file a
drawing left behind before `since`.

It runs after the looks: at the lowest priority, so every job of the queue that is waiting — the
looks, and each drawing they queue — goes first, and while another job of the queue is running on
this node it waits 15 seconds and looks again. One sweep a site waits at a time.

The names deleted are announced on `MishkaCmsCore.Runtime.ShareCard.swept_event/0`, and the core
forgets the ones it remembered as drawn, so a page that asks for one again has it drawn again.

# `after_plan`

```elixir
@spec after_plan(String.t(), integer()) :: Ecto.Changeset.t()
```

The sweep of the site `site_id` that follows a look at every card of it begun at `since`, a Unix
time in seconds.

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