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(require 'mastodon)
(require 'mastodon-http)
(defgroup mastodon-auth nil
"Authenticate with Mastodon."
:group 'mastodon)
(defvar mastodon--client-app-plist nil)
(defvar mastodon--api-token-string nil)
(defun mastodon--register-client-app-triage (status)
"Callback function to triage `mastodon--register-client-app' response.
STATUS is passed by `url-retrieve'."
(mastodon--http-response-triage status
(lambda () (let ((client-data (mastodon--json-hash-table)))
(setq mastodon--client-app-plist
`(:client_id
,(gethash "client_id" client-data)
:client_secret
,(gethash "client_secret" client-data)))))))
(defun mastodon--register-client-app ()
"Adds `:client_id' and `client_secret' to `mastodon--client-plist'."
(mastodon--http-post (mastodon--api-for "apps")
'mastodon--register-client-app-triage
'(("client_name" . "mastodon.el")
("redirect_uris" . "urn:ietf:wg:oauth:2.0:oob")
("scopes" . "read write follow"))))
(defun mastodon--register-and-return-client-app ()
"Registers `mastodon' with an instance. Returns `mastodon--client-app-plist'."
(progn
(mastodon--register-client-app)
mastodon--client-app-plist))
(defun mastodon--store-client-id-and-secret ()
"Stores `:client_id' and `:client_secret' in a plstore."
(let ((client-plist (mastodon--register-and-return-client-app))
(plstore (plstore-open mastodon-token-file)))
(plstore-put plstore "mastodon" `(:client_id
,(plist-get client-plist :client_id)
:client_secret
,(plist-get client-plist :client_secret))
nil)
(plstore-save plstore)
client-plist))
(defun mastodon--client-app ()
"Returns `mastodon--client-app-plist'.
If not set, retrieves client data from `mastodon-token-file'.
If no data can be found in the token file, registers the app and stores its data via `mastodon--store-client-id-and-secret'."
(if (plist-get mastodon--client-app-plist :client_secret)
mastodon--client-app-plist
(let* ((plstore (plstore-open mastodon-token-file))
(mastodon (plstore-get plstore "mastodon")))
(if mastodon
(progn
(setq mastodon--client-app-plist (delete "mastodon" mastodon))
mastodon--client-app-plist)
(progn
(setq mastodon--client-app-plist (mastodon--store-client-id-and-secret))
mastodon--client-app-plist)))))
(defun mastodon--get-access-token-triage (status)
"Callback function to triage `mastodon--get-access-token' response.
STATUS is passed by `url-retrieve'."
(mastodon--http-response-triage status
(lambda ()
(let ((token-data (mastodon--json-hash-table)))
(progn
(setq mastodon--api-token-string (gethash "access_token" token-data))
mastodon--api-token-string)))))
(defun mastodon--get-access-token ()
"Retrieves access token from instance. Authenticates with email address and password.
Email address and password are not stored."
(mastodon--http-post (concat mastodon-instance-url "/oauth/token")
'mastodon--get-access-token-triage
`(("client_id" . ,(plist-get (mastodon--client-app) :client_id))
("client_secret" . ,(plist-get (mastodon--client-app) :client_secret))
("grant_type" . "password")
("username" . ,(read-string "Email: "))
("password" . ,(read-passwd "Password: "))
("scope" . "read write follow"))))
(defun mastodon--access-token ()
"Returns `mastodon--api-token-string'.
If not set, retrieves token with `mastodon--get-access-token'."
(if mastodon--api-token-string
mastodon--api-token-string
(progn
(mastodon--get-access-token)
(while (not mastodon--api-token-string)
(sleep-for 1)
(mastodon--access-token))
mastodon--api-token-string)))
(provide 'mastodon-auth)
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