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Keep the Datalog ruleset minimal — every dl-query re-saturates, so shape queries are SX BFS over erel, not extra closures. 110/110. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
103 lines
2.7 KiB
Plaintext
103 lines
2.7 KiB
Plaintext
;; lib/relations/api.sx — relationship lifecycle + current-db convenience layer.
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;;
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;; A relations db is a live Datalog db holding rel(Src,Dst,Kind) facts (and, for
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;; federation, peer_rel/trust facts) under the engine ruleset
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;; (lib/relations/engine.sx). The query functions live in engine.sx; this module
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;; owns db construction, the assert/retract lifecycle, and a current-db
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;; convenience layer for callers that load a fact base once and query without
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;; threading the db around. This mirrors lib/acl/api.sx.
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(define
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relations-build-db
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(fn (facts) (dl-program-data facts relations-rules)))
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(define relations-current-db nil)
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(define
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relations/load!
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(fn
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(facts)
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(do
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(set! relations-current-db (relations-build-db facts))
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relations-current-db)))
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(define
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relations-ensure-db!
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(fn
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()
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(do
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(when
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(= relations-current-db nil)
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(set! relations-current-db (relations-build-db (list))))
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relations-current-db)))
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;; Add a relationship to the current db (re-saturates).
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(define
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relations/relate
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(fn
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(src dst kind)
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(dl-assert! (relations-ensure-db!) (relations-rel src dst kind))))
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;; Remove a relationship from the current db (re-saturates).
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(define
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relations/unrelate
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(fn
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(src dst kind)
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(dl-retract! (relations-ensure-db!) (relations-rel src dst kind))))
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(define
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relations/children
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(fn (node kind) (relations-children-of (relations-ensure-db!) node kind)))
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(define
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relations/parents
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(fn (node kind) (relations-parents-of (relations-ensure-db!) node kind)))
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(define
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relations/related
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(fn (node kind) (relations-related (relations-ensure-db!) node kind)))
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(define
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relations/descendants
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(fn (node kind) (relations-descendants (relations-ensure-db!) node kind)))
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(define
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relations/ancestors
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(fn (node kind) (relations-ancestors (relations-ensure-db!) node kind)))
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(define
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relations/reachable?
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(fn (a b kind) (relations-reachable? (relations-ensure-db!) a b kind)))
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(define
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relations/roots
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(fn (kind) (relations-roots (relations-ensure-db!) kind)))
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(define
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relations/leaves
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(fn (kind) (relations-leaves (relations-ensure-db!) kind)))
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(define
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relations/cycle?
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(fn (node kind) (relations-cycle? (relations-ensure-db!) node kind)))
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(define
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relations/acyclic?
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(fn (kind) (relations-acyclic? (relations-ensure-db!) kind)))
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(define
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relations/siblings
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(fn (node kind) (relations-siblings (relations-ensure-db!) node kind)))
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(define
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relations/out-degree
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(fn (node kind) (relations-out-degree (relations-ensure-db!) node kind)))
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(define
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relations/in-degree
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(fn (node kind) (relations-in-degree (relations-ensure-db!) node kind)))
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(define
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relations/connected?
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(fn (a b kind) (relations-connected? (relations-ensure-db!) a b kind)))
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