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(defpackage #:lazybones/client.parenscript
(:use #:cl)
(:local-nicknames (#:lzb #:lazybones)
(#:a #:alexandria))
(:export #:generate))
(in-package :lazybones/client.parenscript)
(defun lispify (str)
#+testiere
(:tests
(equalp (lispify "a.b") "a-b")
(equalp (lispify "a/b") "a-b"))
(with-output-to-string (out)
(loop :for c :across str :do
(write-char
(if (find c "./") #\- c)
out))))
(defun client-function-name (method pattern)
"Return a symbol; the name of the parenscript function that will make
an HTTP request of type METHOD at the path implied by PATTERN. PATTERN
is the value of the endpoint's DISPATCH-PATTERN slot."
#+testiere
(:tests
(string-equal
(client-function-name
:get '("" "session" ("doesn't" :matter) "notifications"))
'get-session-notifications)
(string-equal
(client-function-name
:post '("" "foo.bar" "moo"))
'post-foo-bar-moo))
(intern
(lispify
(string-upcase
(format nil "~a-~{~a~^-~}"
method
(remove-if-not (a:conjoin #'stringp (complement #'a:emptyp))
pattern))))))
(defun client-function-lambda-list (variables body?)
#+testiere
(:tests
(equalp
(client-function-lambda-list '("*SESSION*") nil)
'(*session*))
(equalp
(butlast (client-function-lambda-list '("a.x" "b/y" "c") t))
'(a-x b-y c &optional)))
(nconc (mapcar (a:compose #'intern #'string-upcase #'lispify) variables)
(when body? (list '&optional (gensym "BODY")))))
(defun client-function-endpoint-path (prefix pattern)
#+testiere
(:tests
(equalp
(client-function-endpoint-path
"/api" '("" "session" ("id" :blahblah) "notifications"))
'(+ "/api" "/" "session" "/" id "/" "notifications")))
(list* '+ prefix
(loop :for x :in pattern
:unless (zerop (length x))
:collect "/"
:and :collect (if (consp x)
(intern (string-upcase (first x)))
x))))
(defun method-accepts-body? (m)
(member m '(:post :put :patch)))
(defun generate-endpoint-form (app ep)
(let* ((method
(lzb:endpoint-method ep))
(method-name
(symbol-name method))
(content-type
(or (lzb:endpoint-content-type ep)
(lzb::default-content-type app)))
(pattern
(lzb:endpoint-dispatch-pattern ep))
(variables
(lzb:endpoint-route-variables ep))
(function-name
(client-function-name method pattern))
(body?
(method-accepts-body? method))
(lambda-list
(client-function-lambda-list variables body?))
(body
(when body?
(first (last lambda-list))))
(fetch-path
(client-function-endpoint-path (lzb::app-prefix app) pattern)))
`(defun ,function-name ,lambda-list
,(if body
`(fetch ,fetch-path
(ps:create
method ,method-name
headers (ps:create "Content-Type" ,content-type)
redirect "follow"
body ,body))
`(fetch ,fetch-path)))))
(defun generate (app)
(let* ((module
(gensym "MODULE"))
(module-name
(intern (lispify (symbol-name (lzb::app-name app)))))
(defuns
(loop :for ep :in (lzb:app-endpoints app)
:collect (generate-endpoint-form app ep)))
(exports
(loop :for defun :in defuns
:for name := (second defun)
:collect `(ps:@ ,module ,name)
:collect name)))
`(defvar ,module-name
((lambda (,module)
,@defuns
(setf ,@exports)
,module)
(ps:create)))))
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