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|
;;; mastodon-auth.el --- Auth functions for mastodon.el -*- lexical-binding: t -*-
;; Copyright (C) 2017 Johnson Denen
;; Author: Johnson Denen <johnson.denen@gmail.com>
;; Version: 0.8.0
;; Homepage: https://github.com/jdenen/mastodon.el
;; Package-Requires: ((emacs "24.4"))
;; This file is not part of GNU Emacs.
;; This file is part of mastodon.el.
;; mastodon.el is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; mastodon.el is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with mastodon.el. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; mastodon-auth.el supports authorizing and authenticating with Mastodon.
;;; Code:
(require 'plstore)
(require 'auth-source)
(autoload 'mastodon-client "mastodon-client")
(autoload 'mastodon-http--api "mastodon-http")
(autoload 'mastodon-http--get-json "mastodon-http")
(autoload 'mastodon-http--post "mastodon-http")
(defvar mastodon-instance-url)
(defgroup mastodon-auth nil
"Authenticate with Mastodon."
:prefix "mastodon-auth-"
:group 'mastodon)
(defcustom mastodon-auth-source-file ""
"Filename to use to store user names and passwords.
Leave empty to not permanently store any secrets.
Otherwise set to e.g. \"~/.authinfo.gpg\" to have encrypted storage, or
if you are happy with unencryped storage use e.g. \"~/authinfo\"."
:group 'mastodon-auth
:type 'string)
(defvar mastodon-auth--token-alist nil
"Alist of User access tokens keyed by instance url.")
(defvar mastodon-auth--acct-alist nil
"Alist of account accts (name@domain) keyed by instance url.")
(defun mastodon-auth--generate-token ()
"Make POST to generate auth token."
(if (or (null mastodon-auth-source-file)
(string= "" mastodon-auth-source-file))
(mastodon-auth--generate-token-no-storing-credentials)
(mastodon-auth--generate-token-and-store)))
(defun mastodon-auth--generate-token-no-storing-credentials ()
"Make POST to generate auth token."
(mastodon-http--post
(concat mastodon-instance-url "/oauth/token")
`(("client_id" . ,(plist-get (mastodon-client) :client_id))
("client_secret" . ,(plist-get (mastodon-client) :client_secret))
("grant_type" . "password")
("username" . ,(read-string "Email: "))
("password" . ,(read-passwd "Password: "))
("scope" . "read write follow"))
nil
:unauthenticated))
(defun mastodon-auth--generate-token-and-store ()
"Make POST to generate auth token.
Reads and/or stores secres in `MASTODON-AUTH-SOURCE-FILE'."
(let* ((auth-sources (list mastodon-auth-source-file))
(auth-source-creation-prompts
'((user . "Enter email for %h: ")
(secret . "Password: ")))
(credentials-plist (nth 0 (auth-source-search
:create t
:host mastodon-instance-url
:port 443
:require '(:user :secret)))))
(prog1
(mastodon-http--post
(concat mastodon-instance-url "/oauth/token")
`(("client_id" . ,(plist-get (mastodon-client) :client_id))
("client_secret" . ,(plist-get (mastodon-client) :client_secret))
("grant_type" . "password")
("username" . ,(plist-get credentials-plist :user))
("password" . ,(let ((secret (plist-get credentials-plist :secret)))
(if (functionp secret)
(funcall secret)
secret)))
("scope" . "read write follow"))
nil
:unauthenticated)
(when (functionp (plist-get credentials-plist :save-function))
(funcall (plist-get credentials-plist :save-function))))))
(defun mastodon-auth--get-token ()
"Make auth token request and return JSON response."
(with-current-buffer (mastodon-auth--generate-token)
(goto-char (point-min))
(re-search-forward "^$" nil 'move)
(let ((json-object-type 'plist)
(json-key-type 'keyword)
(json-array-type 'vector)
(json-string (buffer-substring-no-properties (point) (point-max))))
(json-read-from-string json-string))))
(defun mastodon-auth--access-token ()
"Return the access token to use with the current `mastodon-instance-url'.
Generate token and set if none known yet."
(let ((token
(cdr (assoc mastodon-instance-url mastodon-auth--token-alist))))
(unless token
(let ((json (mastodon-auth--get-token)))
(setq token (plist-get json :access_token))
(push (cons mastodon-instance-url token) mastodon-auth--token-alist)))
token))
(defun mastodon-auth--get-account-name ()
"Request user credentials and return an account name."
(cdr (assoc
'acct
(mastodon-http--get-json
(mastodon-http--api
"accounts/verify_credentials")))))
(defun mastodon-auth--user-acct ()
"Return a mastodon user acct name."
(or (cdr (assoc mastodon-instance-url mastodon-auth--acct-alist))
(let ((acct (mastodon-auth--get-account-name)))
(push (cons mastodon-instance-url acct) mastodon-auth--acct-alist)
acct)))
(provide 'mastodon-auth)
;;; mastodon-auth.el ends here
|
