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rose-ash/lib/content/stats.sx
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content: document statistics (stats.sx) + 17 tests (433/433)
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-07 02:09:17 +00:00

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;; content-on-sx — document statistics (word/char/block counts, reading time).
;;
;; Counts derive from the plain-text projection (asText, tree-accurate via
;; section recursion) and a tree block count (inline class check, so this needs
;; no section.sx). Reading time uses 200 wpm, rounded up.
;;
;; Requires (loaded by harness): block.sx, doc.sx, text.sx (asText).
(define
ct-words
(fn (s) (filter (fn (w) (if (= w "") false true)) (split s " "))))
(define ct-ceil-div (fn (a b) (quotient (+ a (- b 1)) b)))
(define
ct-stat-section?
(fn (b) (and (st-instance? b) (= (get b :class) "CtSection"))))
(define
ct-stat-count
(fn
(blocks)
(if
(= (len blocks) 0)
0
(let
((b (first blocks)))
(+
(+
1
(if
(ct-stat-section? b)
(let
((ch (st-iv-get b "children")))
(if (list? ch) (ct-stat-count ch) 0))
0))
(ct-stat-count (rest blocks)))))))
(define content/word-count (fn (doc) (len (ct-words (asText doc)))))
(define content/char-count (fn (doc) (string-length (asText doc))))
(define content/block-count (fn (doc) (ct-stat-count (doc-blocks doc))))
(define
content/reading-minutes
(fn
(doc)
(let
((w (content/word-count doc)))
(if (= w 0) 0 (ct-ceil-div w 200)))))
(define content/stats (fn (doc) {:blocks (content/block-count doc) :reading-minutes (content/reading-minutes doc) :words (content/word-count doc) :chars (content/char-count doc)}))