cddb.lisp

(defun cddb-entry(title artist rating)
  (list :title title :artist artist :rating rating))
(defvar *db* nil)
(defun add-record (cd) (push cd *db*))

(defun dump-db ()
  (dolist (cd *db*)
    (format t "~{~a:~10t~a~%~}~%" cd )))

(defun prompt-read (prompt)
  (format *query-io* "~a: " prompt)
  (force-output  *query-io*)
  (read-line *query-io*))

(defun make-prompt-for-cd ()
  (add-record
  	( cddb-entry
    	(prompt-read "Title")
    	(prompt-read "Artist")
    	(or(parse-integer(prompt-read "Rating") :junk-allowed t) 0))))

(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
    #'(lamba (cd) (equal (getf cd :artist) artist))
    *db))