73 lines
2.4 KiB
Scheme
73 lines
2.4 KiB
Scheme
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#!/usr/bin/env -S guile -e main -s
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!#
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(use-modules (ice-9 match)
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(ice-9 getopt-long)
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(dsv))
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(define date-input-format "%d %b %Y")
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(define date-output-format "%Y-%m-%d")
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(define (format-date d)
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(strftime date-output-format
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(car (strptime date-input-format d))))
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(define (read-statement path)
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(call-with-input-file path
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(lambda (port)
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(dsv->scm port #:format 'rfc4180))))
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(define currency-charset (string->char-set "0123456789.-"))
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(define (format-amount s)
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(string-filter currency-charset s))
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(define (process-row row)
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(match-let (((date description location paid-out paid-in) row))
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(list (format-date date)
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description
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location
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(format-amount paid-out)
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(format-amount paid-in))))
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(define (process-statement input-path output-path)
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(match-let (((_ _ _ _ header . data) (read-statement input-path)))
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(let ((updated (cons header (map process-row data))))
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(call-with-output-file output-path
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(lambda (port)
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(scm->dsv updated port #:format 'rfc4180))))))
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(define* (usage #:optional errmsg)
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(with-output-to-port (current-error-port)
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(lambda ()
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(when errmsg
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(display "Error: ")
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(display errmsg)
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(newline))
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(display "\
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Usage: fix-credit-card-statement [options]
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-h, --help Display this help.
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-i, --input=FILENAME Input file path.
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-o, --output=FILENAME Output file path. Required unless --overwrite is given.
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-w, --overwrite Overwrite the input file with the updated data.
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")
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(exit (if errmsg EXIT_FAILURE EXIT_SUCCESS)))))
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(define (main args)
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(let* ((option-spec '((help (single-char #\h) (value #f))
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(input (single-char #\i) (value #t))
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(output (single-char #\o) (value #t))
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(overwrite (single-char #\w) (value #f))))
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(options (getopt-long args option-spec))
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(help-wanted (option-ref options 'help #f))
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(input (option-ref options 'input #f))
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(output (option-ref options 'output #f))
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(overwrite (option-ref options 'overwrite #f)))
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(cond
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(help-wanted (usage))
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((not input) (usage "input filename is required"))
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((and overwrite output) (usage "output filename cannot be given with --overwrite"))
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((not (or overwrite output)) (usage "output filename is required without --overwrite")))
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(process-statement input (or output input))))
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