~lthms/lycan.lisp

2a072db8f7e7af7d9dd164ec84040432669071e9 — Thomas Letan 1 year, 6 months ago 3d62bd8 master
feature: Add a new backend method to fetch puppet (character) info

We factorize code with the previously defined function `get-player`,
thanks to the `get-resource` function. As for the terminology,
`character` suffers the same limitation of `map`, hence we have to
rename it. On the one hand, `map` became `scene`, on the other hand
`character` becomes `puppet`.

Signed-off-by: Thomas Letan <contact@thomasletan.fr>
1 files changed, 35 insertions(+), 10 deletions(-)

M backend.lisp
M backend.lisp => backend.lisp +35 -10
@@ 17,31 17,56 @@
(defpackage :lycan/backend
  (:nicknames :lb)
  (:use :cl :alexandria :flexi-streams)
  (:export get-player))
  (:export player
           get-player
           puppets

           puppet
           get-puppet
           name))

(cl:in-package :lycan/backend)

(defclass player ()
  ((characters :initarg :characters
  ((puppets :initarg :puppets
               :initform nil
               :accessor characters)))

(defun get-player-url (name)
  (concatenate 'string "http://0.0.0.0:4001/player/" name))
               :accessor puppets)))

(defun get-player (name &key then event-cb)
(defun get-resource (id get-url unserialize then &optional event-cb)
  (if then
      (blackbird:catcher
       (blackbird:multiple-promise-bind (body status)
           (das:http-request (get-player-url name))
           (das:http-request (funcall get-url id))
         (if (eq status 200)
             (funcall then (byte-array-to-player body))))
             (funcall then (funcall unserialize body))))
       (error (e)
              (when event-cb
                (funcall event-cb e))))
      (error "need to provide a callback to use the result")))

(defun get-player (name &key then event-cb)
  (get-resource name #'get-player-url #'byte-array-to-player then event-cb))

(defun get-player-url (name)
  (concatenate 'string "http://0.0.0.0:4001/player/" name))

(defun byte-array-to-player (bytes)
  (let* ((json-str (octets-to-string bytes :external-format :utf-8))
         (json (jsown:parse json-str)))
    (make-instance 'player :characters (jsown:val json "characters"))))
    (make-instance 'player :puppets (jsown:val json "puppets"))))

(defclass puppet ()
  ((name :initarg :name
         :initform (error "must supply a name to create a puppet")
         :accessor name)))

(defun get-puppet (key &key then event-cb)
  (get-resource key #'get-puppet-url #'byte-array-to-puppet then event-cb))

(defun get-puppet-url (key)
  (concatenate 'string "http://0.0.0.0:4001/character/" key))

(defun byte-array-to-puppet (bytes)
  (let* ((json-str (octets-to-string bytes :external-format :utf-8))
         (json (jsown:parse json-str)))
    (make-instance 'puppet :name (jsown:val json "name"))))