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;; This file is part of Idest
;; Copyright (C) 2011, 2017 Sergey Poznyakoff
;; Idest is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;;
;; Idest is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with Idest. If not, see <http://www.gnu.org/licenses/>.
(define-module (idest batch setlyrics))
(use-modules (ice-9 getopt-long)
(ice-9 rdelim))
(define (show-help progname)
(format #t "usage: idest --batch=~A [OPTIONS] FILE...\n" progname)
(format #t "sets the USLT (unsynchronised lyric text) frame from a file\n")
(format #t "OPTIONS are:\n")
(format #t " -f, --file FILE read text from FILE (default: stdin)\n")
(format #t " -l, --lang NAME set language in which the lyrics is writen (default: eng)\n")
(format #t " -c, --content TEXT set content description\n")
(format #t " -h, --help show this help summary\n")
(exit 0))
(define-public description
"set song lyrics (USLT frame) from a file")
(define-public idest-main #f)
(define-public (idest-init)
(let* ((cmd (command-line))
(progname (car cmd))
(file #f)
(lang "eng")
(condesc "")
(grammar `((file (single-char #\f) (value #t))
(lang (single-char #\l) (value #t))
(content (single-char #\c) (value #t))
(help))))
(catch 'misc-error
(lambda ()
(for-each
(lambda (x)
(case (car x)
((file)
(set! file (cdr x)))
((lang)
(set! lang (cdr x)))
((content)
(set! condesc (cdr x)))
((help)
(show-help progname))
(else
(set-program-arguments (cons progname (cdr x))))))
(getopt-long cmd grammar)))
(lambda (key . args)
(with-output-to-port
(current-error-port)
(lambda ()
(format #t "~A: " progname)
(apply format #t (list-ref args 1) (list-ref args 2))
(newline)
(exit 1)))))
(cond
((< (length (command-line)) 2)
(format (current-error-port)
"usage: idest -S ~A [OPTIONS] FILE...\n\
Try `idest -S ~A --help', for more info.\n"
progname progname)
(exit 1)))
(let ((text
(with-input-from-port
(if file (open file O_RDONLY) (current-input-port))
(lambda ()
(do ((line-list '())
(line (read-line) (read-line)))
((eof-object? line)
(apply string-append (reverse line-list)))
(set! line-list (cons line (cons "\n" line-list))))))))
(letrec ((mainfunc
(lambda (name frames)
(append
(filter
(lambda (elt)
(not (and (string=? (car elt) "USLT")
(let ((v (assoc-ref (cdr elt) 'lang)))
(or (not v) (string=? lang)))
(let ((v (assoc-ref (cdr elt) 'condesc)))
(or (not v) (string=? condesc))))))
frames)
(list
(cons
"USLT"
(list (cons 'lang lang)
(cons 'condesc condesc)
(cons 'text text))))))))
(set! idest-main mainfunc)))))
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