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skeet.el
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skeet.el
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;;; skeet.el --- Post on Bluesky from Emacs. -*- lexical-binding:t -*-
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;; Copyright (C) 2025 Amy
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;; Author: Amy <amy+git@amogus.cloud>
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;; Version: 1.0
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;; Package-Requires: ((request "20250219.2213"))
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(require 'request)
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;;; Code:
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(defvar skeet--session nil)
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(defvar skeet--last-used nil)
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;;;###autoload
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(defgroup skeet nil
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"Configure the Skeet bluesky client.")
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(defcustom skeet-user-handle ""
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"Your ATProto/Bluesky handle"
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:type '(string)
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:group 'skeet)
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(defcustom skeet-app-password ""
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"Your app password. It could also be your regular password, although, it's not recommended."
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:type '(string)
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:group 'skeet)
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(defcustom skeet-quickdid-endpoint "https://quickdid.smokesignal.tools"
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"Instance of QuickDID used to resolve handles to their decentralized identifiers."
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:type '(string)
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:group 'skeet)
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(defcustom skeet-plc-directory "https://plc.directory"
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"Public ledger of credentials, used for PDS resolution."
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:type '(string)
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:group 'skeet)
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(defconst skeet--b32s-charset (mapcar
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'char-to-string
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(string-to-list "234567abcdefghijklmnopqrstuvwxyz")))
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(defun skeet--to-base32-sortable (int)
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(let ((s "")
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(i int))
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(while (not (= i 0))
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(let ((c (% i 32)))
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(setq i (floor (/ i 32)))
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(setq s (concat s (nth c skeet--b32s-charset)))))
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s))
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(defun skeet--get-epoch ()
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(floor (float-time)))
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(defun skeet--get-clock-id ()
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(floor (random 1023)))
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(defun skeet--tid (ts clock-id)
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"Generate a new Timestamp Identifier (TID)
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Used for Record keys"
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(concat (string-pad (skeet--to-base32-sortable ts) 11 ?2)
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(string-pad (skeet--to-base32-sortable clock-id) 2 ?2)))
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(defun skeet--time-to-iso-8601 (ts)
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(format-time-string "%Y-%m-%dT%H:%M:%SZ" (seconds-to-time ts)))
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(defun skeet--resolve-did-by-handle (handle)
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"Resolve the user's DID by handle using QuickDID"
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(let ((did nil))
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(request (concat skeet-quickdid-endpoint
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"/xrpc/com.atproto.identity.resolveHandle")
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:params `(("handle" . ,handle))
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:parser #'skeet--util-json
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:sync t
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:success (cl-function
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(lambda (&key data &allow-other-keys)
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(setq did (gethash "did" data)))))
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did))
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(defun skeet--util-json ()
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"Parsing utility for request.el"
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(let ((json-object-type 'hash-table)
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(json-array-type 'list))
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(json-read)))
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(defun skeet--to-pds-route (pds nsid)
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(concat
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(gethash "serviceEndpoint" pds)
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"/xrpc/"
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nsid))
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(defun skeet--get-pds-from-document (document)
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"Utility function to extract the user's PersonalDataService for later use
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IE. Authentication, Posting"
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(defun find-pds-service (services)
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(let ((service (car services)))
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(cond
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((null service) (error "No PDS declared in document"))
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((equal "#atproto_pds" (gethash "id" service)) service)
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(t (find-pds-service (cdr services))))))
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(let ((declared-services (gethash "service" document)))
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(find-pds-service declared-services)))
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(defun skeet--get-pds (did)
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"Get the user's PDS from their PLC document"
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(let ((pds-info nil))
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(request (concat skeet-plc-directory "/" did)
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:parser #'skeet--util-json
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:sync t
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:success (cl-function
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(lambda (&key data &allow-other-keys)
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(setq pds-info (skeet--get-pds-from-document data)))))
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pds-info))
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(defun skeet--create-session (pds id)
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(let ((session-information nil))
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(request (skeet--to-pds-route pds "com.atproto.server.createSession")
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:type "POST"
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:data (json-encode `(("identifier" . ,id)
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("password" . ,skeet-app-password)))
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:headers '(("Content-Type" . "application/json"))
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:parser #'skeet--util-json
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:sync t
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:success (cl-function
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(lambda (&key data &allow-other-keys)
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(setq session-information data)))
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:error (cl-function
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(lambda (&rest args &key error-thrown &key data &allow-other-keys)
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(message (format "Got Error: %S\n%s" error-thrown data)))))
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session-information))
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(defun skeet--make-post-data (did content rkey)
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;; https://docs.bsky.app/docs/advanced-guides/posts
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`((repo . ,did)
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(collection . "app.bsky.feed.post")
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(record . (($type . "app.bsky.feed.post")
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(text . ,content)
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(createdAt . ,(skeet--time-to-iso-8601
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(skeet--get-epoch)))))
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(rkey . ,rkey)
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(validate . t)))
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(defun skeet--validate-post-len (cnt)
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(if (< 300 (length cnt))
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(error "Message is too long. Maximum length is 300 characters.")
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cnt))
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(defun skeet--create-session-if-not-exists (did pds)
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"Returns either a cached session (initial + refresh JWT) or a brand new session."
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(if (null skeet--session)
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(setq skeet--session (let ((new-session (skeet--create-session pds did)))
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`((access-jwt . ,(gethash "accessJwt" new-session))
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(refresh-jwt . ,(gethash "refreshJwt" new-session)))))
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(if (< (+ skeet--last-used 60) (skeet--get-epoch))
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(message "TODO: Refresh token...")
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skeet--session)))
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;;;###autoload
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(defun skeet ()
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"Publish something to your bluesky account"
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(interactive)
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(let* ((post-content (read-string "Skeet: "))
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(did (skeet--resolve-did-by-handle skeet-user-handle))
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(pds (skeet--get-pds did))
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(session (skeet--create-session-if-not-exists did pds)))
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(request (skeet--to-pds-route pds "com.atproto.repo.createRecord")
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:data (json-encode (skeet--make-post-data did
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post-content
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(skeet--tid
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(skeet--get-epoch)
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(skeet--get-clock-id))))
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:headers `(("Content-Type" . "application/json")
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("Authorization" . ,(concat "Bearer " (cdr (assoc 'access-jwt session)))))
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:type "POST"
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:sync t
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:success (cl-function
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(lambda ()
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(message "Check bluesky i guess")))
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:error (cl-function
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(lambda (&rest args &key error-thrown &key data &allow-other-keys)
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(message (format "Got Error: %S\n%s" error-thrown data)))))))
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(provide 'skeet)
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;;; skeet.el ends here