55 lines
1.7 KiB
Racket
55 lines
1.7 KiB
Racket
#lang racket/base
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(require racket/list
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keystore
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"util.rkt")
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(provide open-flac2opus-state
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flac2opus-state-get-file
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flac2opus-state-set-file!
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flac2opus-state-drop-file!
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flac2opus-state-known-relpaths)
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(define prefix "flac2opus:file:")
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(define (open-flac2opus-state state-file)
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(ks-open state-file))
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(define (file-state-key relpath)
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(string-append prefix (normalize-relpath-string relpath)))
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(define (legacy-file-state-key relpath)
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(string-append prefix (legacy-backslash-relpath-string relpath)))
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(define (ks-drop/quiet! ks key)
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(with-handlers ([exn:fail? (lambda (_) (void))])
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(ks-drop! ks key)))
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(define (flac2opus-state-get-file ks relpath [default #f])
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(define key (file-state-key relpath))
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(define legacy-key (legacy-file-state-key relpath))
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(define missing (gensym 'missing))
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(define value (ks-get ks key missing))
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(cond [(not (eq? value missing)) value]
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[(equal? key legacy-key) default]
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[else (ks-get ks legacy-key default)]))
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(define (flac2opus-state-set-file! ks relpath value)
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(define key (file-state-key relpath))
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(define legacy-key (legacy-file-state-key relpath))
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(ks-set! ks key value)
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(unless (equal? key legacy-key) (ks-drop/quiet! ks legacy-key)))
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(define (flac2opus-state-drop-file! ks relpath)
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(define key (file-state-key relpath))
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(define legacy-key (legacy-file-state-key relpath))
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(ks-drop/quiet! ks key)
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(unless (equal? key legacy-key) (ks-drop/quiet! ks legacy-key)))
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(define (flac2opus-state-known-relpaths ks)
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(remove-duplicates
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(map (lambda (k)
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(normalize-relpath-string (substring k (string-length prefix))))
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(ks-keys-glob ks (string-append prefix "*")))
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equal?))
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