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rose-ash/lib/mod/link.sx
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mod: Ext 4 — report linking + dedup (Prolog-backed retrieval), 176/176
mod/related-ids and mod/reporters-of find reports about a subject via a Prolog
relational query (report(Id, _, 'subject')) — the policy substrate reused for
retrieval. mod/dedup-reports collapses identical reports by a normalized
reporter|subject|reason key; mod/distinct-reporters-of counts unique reporters.
Own suite (tests/link.sx). +12 tests.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-06 18:09:37 +00:00

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;; lib/mod/link.sx — report linking + deduplication.
;;
;; Reports about the same subject form a cluster; identical reports (same
;; reporter + subject + reason) are duplicates. Linking is Prolog-backed: all
;; report facts are loaded and related ids are found by unification — the same
;; relational substrate the policy engine uses, here for retrieval rather than
;; decision. Dedup is pure SX over a normalized link key.
(define
mod/link-key
(fn
(r)
(str
(mod/report-by r)
"|"
(mod/report-about r)
"|"
(downcase (mod/report-reason r)))))
(define
mod/dedup-reports
(fn
(reports)
(reduce
(fn
(acc r)
(if
(mod/any? (fn (x) (= (mod/link-key x) (mod/link-key r))) acc)
acc
(append acc (list r))))
(list)
reports)))
(define
mod/duplicate-count
(fn (reports) (- (len reports) (len (mod/dedup-reports reports)))))
;; ── Prolog-backed relational retrieval ──
(define
mod/report-rel-facts
(fn
(reports)
(mod/join-with
"\n"
(map
(fn
(r)
(str
"report("
(mod/report-id r)
", "
(mod/pl-quote (mod/report-by r))
", "
(mod/pl-quote (mod/report-about r))
")."))
reports))))
(define
mod/related-ids
(fn
(subject reports)
(let
((db (pl-load (mod/report-rel-facts reports))))
(map
(fn (sol) (dict-get sol "Id"))
(pl-query-all db (str "report(Id, _, " (mod/pl-quote subject) ")"))))))
(define
mod/reporters-of
(fn
(subject reports)
(let
((db (pl-load (mod/report-rel-facts reports))))
(map
(fn (sol) (dict-get sol "By"))
(pl-query-all db (str "report(_, By, " (mod/pl-quote subject) ")"))))))
(define
mod/distinct
(fn
(items)
(reduce
(fn
(acc x)
(if (mod/any? (fn (y) (= y x)) acc) acc (append acc (list x))))
(list)
items)))
(define
mod/distinct-reporters-of
(fn (subject reports) (mod/distinct (mod/reporters-of subject reports))))