Telegram 群组里经常能见到转发来自别的 IM 比如 IRC、 Matrix 消息的机器人。
但是这些机器人发来的消息不太好辨认，所以我写了一个简单的 telega.el 补丁来替换用户名和头像。
效果如下，还不太完美，比如转发的消息可能合并在一起显示了，应该根据实际的用户名进行合并，分隔用户名和正文的逻辑是硬编码的，等等问题。各位可以根据需要自行修改。
使用方法
(require 'telega-bridge-bot)
;; 这两个 id 是 emacs cn 频道和 archlinux 频道的转发机器人，可以自行补充
(setq telega-bridge-bot-id-list '(5296957089 420415423))
(telega-bridge-bot-replace-user)
;;; package --- Replace bridge bot username
;;; Commentary:
;; Replace the bridge bot's username with the sender's username.
;;; Code:
(require 'telega)
(defvar telega-bridge-bot-id-list '(5296957089 420415423))
(defun telega-user-color! (user cache-id)
"Return color list associated with USER.
It will use CACHE-ID as the plist key to cache the result."
(or (plist-get user cache-id)
(let* ((chat (telega-chat-get (plist-get user :id) 'offline))
(colors (if chat
(telega-chat-color chat)
(let ((user-title (telega-user-title user 'name)))
(list (funcall telega-rainbow-color-function
user-title 'light)
(funcall telega-rainbow-color-function
user-title 'dark))))))
(plist-put user cache-id colors)
colors)))
(defun telega-ins--message0! (orig-fun &rest args)
"Advice function for `telega-ins--message0'."
(if-let* ((msg (car args)) ; get the orig msg
(bot-id (telega--tl-get msg :sender_id :user_id))
(_ (memql bot-id telega-bridge-bot-id-list)) ; check if it is a bridge bot
(content (telega--tl-get msg :content))
(_ (eq (telega--tl-type content) 'messageText))
(content-text (telega--tl-get content :text))
(_ (eq (telega--tl-type content-text) 'formattedText))
(content-text-text (telega--tl-get content-text :text)) ; get the msg body
(name-and-body (split-string content-text-text ": "))
(name (car name-and-body))
(body (cadr name-and-body))
(cache-id (concat (number-to-string bot-id) name))
(cache-id-color (intern (concat "color" cache-id)))
(cache-id-image (intern (concat "image" cache-id)))
;; TODO: delete usename in msg body
)
;; change user title and avatar
(cl-letf* (((symbol-function 'telega-user-title) (lambda (&rest _) name)) ; replace user title
((symbol-function 'telega-user-color)
(lambda (user) (telega-user-color! user cache-id-color))) ; cache username color
(orig-telega-avatar--create-image (symbol-function 'telega-avatar--create-image))
((symbol-function 'telega-avatar--create-image)
(lambda (sender _ &optional cheight addon-function)
;; Set file as nil
;; So telega will think that the user does not have an avatar,
;; and use the first character of the user name to generate an avatar
(funcall orig-telega-avatar--create-image sender nil cheight addon-function)))
(orig-telega-media--image (symbol-function 'telega-media--image))
((symbol-function 'telega-media--image)
(lambda (obj-spec file-spec &optional force-update _)
;; Set cache key
(funcall orig-telega-media--image obj-spec file-spec force-update cache-id-image))))
(apply orig-fun args))
;; Otherwise return the orig msg
(apply orig-fun args)))
(defun telega-bridge-bot-replace-user ()
"Replace bridge bot's username and avatar."
(advice-add 'telega-ins--message0 :around #'telega-ins--message0!))
(provide 'telega-bridge-bot)
;;; telega-bridge-bot.el ends here
如果有更新会同步在这里：