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rose-ash/lib/feed/mute.sx
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feed: viewer mute/block — mute actors/tags/objects + apply-prefs bag + 9 tests
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-06 16:57:05 +00:00

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; feed/mute — viewer-controlled filtering. ACL (acl.sx) is author-controlled
; visibility; mute is the reader's own preference: hide muted actors or tags.
; Like ACL it is per-viewer and applied per request, never cached.
;
; Requires: lib/feed/normalize.sx, lib/feed/stream.sx, lib/feed/fanout.sx
; (feed/-elem?).
; drop activities authored by a muted actor
(define
feed/mute-actors
(fn
(stream actors)
(feed/filter
stream
(fn (a) (not (feed/-elem? (get a :actor) actors))))))
; drop activities carrying any muted tag
(define
feed/mute-tags
(fn
(stream tags)
(feed/filter
stream
(fn (a) (not (some (fn (t) (feed/-elem? t tags)) (get a :tags)))))))
; drop activities about a muted object (thread mute)
(define
feed/mute-objects
(fn
(stream objects)
(feed/filter
stream
(fn (a) (not (feed/-elem? (get a :object) objects))))))
; apply a viewer preference bag: {:mute-actors (...) :mute-tags (...) :mute-objects (...)}
(define
feed/apply-prefs
(fn
(stream prefs)
(feed/mute-objects
(feed/mute-tags
(feed/mute-actors stream (get prefs :mute-actors (list)))
(get prefs :mute-tags (list)))
(get prefs :mute-objects (list)))))