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Racket

#lang debug racket/base
(require racket/list
"index.rkt")
(provide make-words)
(define (make-words #:letters [letters-arg #f]
#:mandatory [mandatory #f]
#:omit [omit #f]
#:combo [combo #f]
#:min [min-length-arg 5]
#:max [max-length-arg 10]
#:hide-plurals [hide-plurals? #t]
#:proper-names [proper-names? #f]
#:count [count 10]
#:case [casing #f])
(define letters (or letters-arg "abcdefghijklmnopqrstuvwxyz"))
(define mandatory-cs
(if (or mandatory combo)
(remove-duplicates
(for/list ([c (in-string (string-append (or mandatory "") (or combo "")))])
(char-downcase c)) char=?) null))
(define forbidden-cs
(remove-duplicates
(for/list ([c (in-string (or omit ""))])
(char-downcase c)) char=?))
(define letter-cs-charidx
(word->charidx
(list->string
(remove-duplicates
(append (if letters
(for/list ([c (in-string letters)])
(char-downcase c))
null)
mandatory-cs)
char=?))))
(define caser (case casing
[(up upcase upper uppercase) string-upcase]
[(title titlecase) string-titlecase]
[(down downcase lower lowercase) string-downcase]
[else values]))
(define min-length (or min-length-arg 0))
(define max-length (or max-length-arg +inf.0))
(for*/fold ([word-acc null]
[count-acc 0]
#:result word-acc)
([idx (in-list (shuffle (range (vector-length wordrecs))))]
[rec (in-value (vector-ref wordrecs idx))]
[word-charidx (in-value (word-rec-charint rec))]
[word (in-value (word-rec-word rec))]
#:break (= count-acc (or count +inf.0))
#:when (and
;; between min and max length
((if (<= min-length max-length) <= >=) min-length (word-rec-length rec) max-length)
;; word contains each mandatory char, case-insensitive
(for/and ([mc (in-list mandatory-cs)])
(word-charidx . contains-char? . mc))
;; word contains only letters + mandatory, case-insensitive
(for/and ([wc (in-list (map char-downcase (charidx->chars word-charidx)))])
(letter-cs-charidx . contains-char? . wc))
(or (not combo)
(regexp-match combo word))
;; word does not contain forbidden characters
(for/and ([fc (in-list forbidden-cs)])
(not (word-charidx . contains-char? . fc)))
;; maybe only proper names
(if proper-names?
(capitalized? word-charidx)
(not (capitalized? word-charidx)))
;; maybe hide plurals
(or (not hide-plurals?)
(not (word-rec-plural? rec)))))
(values (cons (caser word) word-acc) (add1 count-acc))))
(module+ test
(require rackunit)
(time (make-words))
(check-equal? (sort (make-words #:mandatory "xyz" #:combo #false #:letters "etaoinshrdluw") string<?)
'("azoxy" "dysoxidize" "isazoxy" "oxytonize" "rhizotaxy" "zootaxy")))