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(in-package #:gravatar)
(defvar +base-uri+ (puri:uri "https://secure.gravatar.com/")
"Why would we ever _not_ use SSL?")
(defun hash (email)
(string-downcase (format nil "~{~2,'0x~}"
(coerce (md5:md5sum-sequence
(string-downcase (string-trim '(#\space)
email)))
'list))))
(defun image (email &key size default force-default-p rating)
"DEFAULT may be either a URL to your own image, or one of :404, :mm,
:identicon, :monsterid, :wavatar, or :retro. RATING may be one of :g, :pg,
:r, or :x."
(let ((parameters ()))
(when size (push (format nil "s=~d" size) parameters))
(typecase default
(keyword (push (format nil "d=~a"
(string-downcase (symbol-name default)))
parameters))
(string (push (format nil "d=~a" default) parameters)))
(when force-default-p (push "f=y" parameters))
(when rating
(push (format nil "r=~a" (string-downcase (symbol-name rating)))
parameters))
(puri:merge-uris (format nil "avatar/~a~@[?~{~a~^&~}~]"
(hash email)
parameters)
+base-uri+)))
(defun generate-profile-url (email type parameters)
(puri:merge-uris (format nil "g2-~a.~a~@[?~:{~a=~a~^&~}~]"
(hash email)
(string-downcase (symbol-name type))
(mapcar (lambda (parameter)
(list (car parameter) (cdr parameter)))
parameters))
+base-uri+))
(defun profile (email &optional js-callback)
(json:decode-json-from-string
(babel:octets-to-string
(drakma:http-request (generate-profile-url
email
:json
(when js-callback
`(("callback" . ,js-callback))))))))
(defun qr-code (email &optional size)
(generate-profile-url email :qr (when size `(("s" . ,size)))))