CnActivityTab

The activity integration's sidebar tab, and (as the integration's widgetExpanded) its full-size widget on a detail page or a manifest grid. It shows one list of what happened to an object: field changes (the audit trail), NC Activity, attached files, notes and mail, newest first, grouped by day, with the actor, the time and the kind of each row.

It reads OpenRegister's merged activity feed and pages on the feed's time cursor. A server without the merged feed (404, 405 or 501) makes the tab read the single-source Activity endpoint it read before, with its type, actor and date filters; the legacyFeed prop selects that on purpose.

• A chip per kind. Changes, Activity, Files, Notes and Mail, each with the count the feed returns. A kind with no rows keeps its chip, reading 0: a chip that vanished would say the kind does not exist on this object. A chip narrows the feed to that kind.
• Reads are off. Read entries are left out by default. The reader's choice to show them is remembered per user, in their preferences (the cnUserPreferences group from CnAppRoot), or in the browser without one. Only an audit row can be a read: a note whose action is spelled read is still shown.
• A date range. From and until, which is what the feed takes. The 24h, 7d and 30d presets fill in From and leave Until open.
• Export. Exports the rows on screen as CSV, with the filters that produced them, and re-queries nothing, so the file and the list beside it cannot disagree.

A printed (PDF) feed is not offered. The tab does not check access to the rows either: the read that opened the object decided that.

The wire

The names the tab sends and reads are in src/integrations/builtin/activity/activityFeedWire.js, in one place:

Read	GET {apiBase}/objects/{register}/{schema}/{id}/activity-feed?limit&kinds&from&until&reads&actor&visibility&cursor
Response	{ results, cursor, counts: { <kind>: n } }, cursor null at the end
Export	POST .../activity-feed/export with { rows, filters }, answering CSV

These names are what the feed's contract implies; they have not been measured against OpenRegister yet. When the measured shape differs, change that file.

Props

Prop	Type	Default	Description
integrationId	String	'activity'	Stable integration id, forwarded by the registry.
objectId	String	required	Parent object id.
register	String	''	OpenRegister register id (slug or uuid).
schema	String	''	OpenRegister schema id (slug or uuid).
apiBase	String	/apps/openregister/api	Base API URL.
pageSize	Number	25	Rows per fetch.
legacyFeed	Boolean	false	Read the single-source NC Activity endpoint (type, actor and date-range filters; no kinds, reads toggle or export) instead of the merged feed. The tab also falls back to it by itself when the server has no merged feed.
showVisibility	Boolean	false	Show a visibility chip on each row and a visibility filter.
publicViewOnly	Boolean	false	The caller is served the public view only: the visibility filter is fixed at public, with the reason.
emptyLabel	String	"No activity yet for this object"	Pre-translated empty-state label.
unavailableLabel	String	"NC Activity is currently unavailable."	Pre-translated unavailable banner.
loadMoreLabel	String	"Load more"	Pre-translated load-more button label.

Events

Event	Payload	Description
exported	Number	The feed on screen was exported; the number of rows.

Slots

None.

The board look

In the board look the tab draws as the History panel: a header with an h2, a muted subtitle and the Export button (plus "Add note", which emits add-note, when showAddNote is set), the kind chips as 36px pills with count badges, and the events as one rail. Each event has a 34px round icon on a tint of its kind, a 2px connector to the next one, the verb in bold and a meta line "Kind · who · when". The date range, reads toggle and date pickers stay below the chips.

Prop	Type	Default	Description
showAddNote	Boolean	false	Draw an "Add note" button in the board look's header. It emits add-note.