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objects.lisp
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objects.lisp
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;;;; cl-spotify.lisp
;;
;; Copyright (c) 2020 Jeremiah LaRocco <jeremiah_larocco@fastmail.com>
;; Permission to use, copy, modify, and/or distribute this software for any
;; purpose with or without fee is hereby granted, provided that the above
;; copyright notice and this permission notice appear in all copies.
;; THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
;; WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
;; MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
;; ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
;; WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
;; ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
;; OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
(in-package :cl-spotify)
(defclass spotify-object ()
((json :initarg :json :type st-json:jso))
(:documentation "A Spotify object."))
(defclass spotify-track (spotify-object)
()
(:documentation "A spotify track object."))
(defclass spotify-artist (spotify-object)
()
(:documentation "A spotify artist object."))
(defun to-object (json)
(if-let (obj-type (getjso "type" json))
(let ((object-type (intern (concatenate 'string "SPOTIFY-" (string-upcase obj-type))
'cl-spotify)))
(handler-case
(when (find-class object-type)
(make-instance object-type :json json))
(class-not-found-error (err)
(declare (ignorable err))
(format t "object type ~a not implemented!~%" object-type)
(make-instance 'spotify-object :json json))))
(make-instance 'spotify-object :json json)))
(defmethod print-object ((object spotify-object) stream)
(format stream "~a~%~a~%" (type-of object) (slot-value object 'json)))