63 lines
1.6 KiB
Common Lisp
63 lines
1.6 KiB
Common Lisp
(defvar *db* nil)
|
|
|
|
(defun make-cd (title artist rating ripped)
|
|
(list :title title :artist artist :rating rating :ripped ripped))
|
|
|
|
(defun add-record (cd)
|
|
(push cd *db*))
|
|
|
|
(defun dump-db ()
|
|
(dolist (cd *db*)
|
|
(format t "~{~a:~9t~a~%~}~%" cd)))
|
|
|
|
(defun prompt-read (prompt)
|
|
(format *query-io* "~a: " prompt)
|
|
(force-output *query-io*)
|
|
(read-line *query-io*))
|
|
|
|
(defun prompt-for-cd ()
|
|
(make-cd
|
|
(prompt-read "Title")
|
|
(prompt-read "Artist")
|
|
(or (parse-integer (prompt-read "Rating") :junk-allowed t) 0)
|
|
(y-or-n-p "Ripped [y/n]: ")))
|
|
|
|
(defun save-db (filename)
|
|
(with-open-file (out filename
|
|
:direction :output
|
|
:if-exists :supersede)
|
|
(with-standard-io-syntax
|
|
(print *db* out))))
|
|
|
|
(defun load-db (filename)
|
|
(with-open-file (in filename)
|
|
(with-standard-io-syntax
|
|
(setf *db* (read in)))))
|
|
|
|
(defun select-by-artist (artist)
|
|
(remove-if-not
|
|
#'(lambda (cd) (equal (getf cd :artist) artist))
|
|
*db*))
|
|
|
|
(defun select (selector-fn)
|
|
(remove-if-not selector-fn *db*))
|
|
|
|
(defun where (&key artist title rating (ripped nil ripped-p))
|
|
#'(lambda (cd)
|
|
(and
|
|
(if title (equal (getf cd :title) title) t)
|
|
(if artist (equal (getf cd :artist) artist) t)
|
|
(if rating (equal (getf cd :rating) rating) t)
|
|
(if ripped-p (equal (getf cd :ripped) ripped) t))))
|
|
|
|
(defun update (selector-fn &key title artist rating (ripped nil ripped-p))
|
|
(setf *db*
|
|
(mapcar
|
|
#'(lambda (row)
|
|
(when (funcall selector-fn row)
|
|
(if title (setf (getf row :title) title))
|
|
(if artist (setf (getf row :artist) artist))
|
|
(if rating (setf (getf row :rating) rating))
|
|
(if ripped-p (setf (getf row :ripped) ripped)))
|
|
row)
|
|
*db*)))
|