;;; erc-capab.el --- support for dancer-ircd and hyperion's CAPAB -*- lexical-binding: t; -*- ;; Copyright (C) 2006-2021 Free Software Foundation, Inc. ;; Maintainer: Amin Bandali ; This file is part of GNU Emacs. ;; GNU Emacs 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. ;; GNU Emacs 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 GNU Emacs. If not, see . ;;; Commentary: ;; This file defines the ERC module `erc-capab-identify', which allows ;; flagging of unidentified users on servers running dancer-ircd or ;; hyperion. freenode.net supports this capability, for example. ;; With CAPAB IDENTIFY-MSG and IDENTIFY-CTCP enabled, messages from ;; users who have identified themselves to NickServ will have a plus ;; sign and messages from unidentified users will have a minus sign ;; added as a prefix. Note that it is not necessary for your nickname ;; to be identified in order to receive these marked messages. ;; The plus or minus sign is removed from the message, and a prefix, ;; `erc-capab-identify-prefix', is inserted in the front of the user's ;; nickname if the nickname is not identified. ;; Please note that once this has been enabled on a server, there is no ;; way to tell the server to stop sending marked messages. If you ;; disable this module, it will continue removing message flags, but the ;; unidentified nickname prefix will not be added to messages. ;; Visit and ;; to find further ;; explanations of this capability. ;; From freenode.net's web site (not there anymore) on how to mark ;; unidentified users: ;; "We recommend that you add an asterisk before the nick, and ;; optionally either highlight or colorize the line in some ;; appropriate fashion, if the user is not identified." ;;; Usage: ;; Put the following in your init file. ;; (require 'erc-capab) ;; (erc-capab-identify-mode 1) ;; `erc-capab-identify-prefix' will now be added to the beginning of ;; unidentified users' nicknames. The default is an asterisk, "*". ;; You can customize the prefix and the face used to display it, ;; `erc-capab-identify-unidentified'. If the value of ;; `erc-capab-identify-prefix' is nil or you disable this module (see ;; `erc-capab-identify-disable'), no prefix will be inserted, but the ;; flag sent by the server will still be stripped. ;;; Code: (require 'erc) ;;; Customization: (defgroup erc-capab nil "Support for dancer-ircd's CAPAB settings." :group 'erc) (defcustom erc-capab-identify-prefix "*" "The prefix used for unidentified users. If you change this from the default \"*\", be sure to use a character not found in IRC nicknames to avoid confusion." :type '(choice string (const nil))) (defface erc-capab-identify-unidentified '((t)) ; same as `erc-default-face' "Face to use for `erc-capab-identify-prefix'." :group 'erc-faces) ;;; Define module: ;;;###autoload(autoload 'erc-capab-identify-mode "erc-capab" nil t) (define-erc-module capab-identify nil "Handle dancer-ircd's CAPAB IDENTIFY-MSG and IDENTIFY-CTCP." ;; append so that `erc-server-parameters' is already set by `erc-server-005' ((add-hook 'erc-server-005-functions #'erc-capab-identify-setup t) (add-hook 'erc-server-290-functions #'erc-capab-identify-activate) (add-hook 'erc-server-PRIVMSG-functions #'erc-capab-identify-remove/set-identified-flag) (add-hook 'erc-server-NOTICE-functions #'erc-capab-identify-remove/set-identified-flag) (add-hook 'erc-insert-modify-hook #'erc-capab-identify-add-prefix t) (mapc (lambda (buffer) (when buffer (with-current-buffer buffer (erc-capab-identify-setup)))) (erc-buffer-list #'erc-open-server-buffer-p))) ((remove-hook 'erc-server-005-functions #'erc-capab-identify-setup) (remove-hook 'erc-server-290-functions #'erc-capab-identify-activate) ;; we don't remove the `erc-capab-identify-remove/set-identified-flag' hooks ;; because there doesn't seem to be a way to tell the server to turn it off (remove-hook 'erc-insert-modify-hook #'erc-capab-identify-add-prefix))) ;;; Variables: (defvar-local erc-capab-identify-activated nil "CAPAB IDENTIFY-MSG has been activated.") (defvar-local erc-capab-identify-sent nil "CAPAB IDENTIFY-MSG and IDENTIFY-CTCP messages have been sent.") ;;; Functions: (defun erc-capab-identify-setup (&optional _proc _parsed) "Set up CAPAB IDENTIFY on the current server. Optional argument PROC is the current server's process. Optional argument PARSED is the current message, a response struct. These arguments are sent to this function when called as a hook in `erc-server-005-functions'." (unless erc-capab-identify-sent (erc-capab-identify-send-messages))) (defun erc-capab-identify-send-messages () "Send CAPAB IDENTIFY messages if the server supports it." (when (and (stringp erc-server-version) (string-match "^\\(dancer-ircd\\|hyperion\\)" erc-server-version) ;; could possibly check for '("IRCD" . "dancer") in ;; `erc-server-parameters' instead of looking for a specific name ;; in `erc-server-version' (assq 'CAPAB erc-isupport-parameters)) (erc-log "Sending CAPAB IDENTIFY-MSG and IDENTIFY-CTCP") (erc-server-send "CAPAB IDENTIFY-MSG") (erc-server-send "CAPAB IDENTIFY-CTCP") (setq erc-capab-identify-sent t))) (defun erc-capab-identify-activate (_proc parsed) "Set `erc-capab-identify-activated' and display an activation message. PROC is the current server's process. PARSED is an `erc-parsed' response struct." (when (member (erc-response.contents parsed) '("IDENTIFY-MSG" "IDENTIFY-CTCP")) (setq erc-capab-identify-activated t) (erc-display-message parsed 'notice 'active (format "%s activated" (erc-response.contents parsed))))) (defun erc-capab-identify-remove/set-identified-flag (_proc parsed) "Remove PARSED message's id flag and add the `erc-identified' text property. PROC is the current server's process. PARSED is an `erc-parsed' response struct." (let ((msg (erc-response.contents parsed))) (when (and erc-capab-identify-activated (string-match "^\\([-\\+]\\)\\(.+\\)$" msg)) (setf (erc-response.contents parsed) (if erc-capab-identify-mode (propertize (match-string 2 msg) 'erc-identified (if (string= (match-string 1 msg) "+") 1 0)) (match-string 2 msg))) nil))) (defun erc-capab-identify-add-prefix () "Add `erc-capab-identify-prefix' to nickname if user is unidentified." (when (and erc-capab-identify-prefix (erc-with-server-buffer erc-capab-identify-activated)) (goto-char (or (erc-find-parsed-property) (point-min))) (let ((nickname (erc-capab-identify-get-unidentified-nickname (erc-get-parsed-vector (point))))) (when (and nickname (goto-char (point-min)) ;; assuming the first use of `nickname' is the sender's nick (re-search-forward (regexp-quote nickname) nil t)) (goto-char (match-beginning 0)) (insert (propertize erc-capab-identify-prefix 'font-lock-face 'erc-capab-identify-unidentified)))))) (defun erc-capab-identify-get-unidentified-nickname (parsed) "Return the nickname of the user if unidentified. PARSED is an `erc-parsed' response struct." (when (and (erc-response-p parsed) (equal 0 (get-text-property 0 'erc-identified (erc-response.contents parsed)))) (let ((nickuserhost (erc-get-parsed-vector-nick parsed))) (when nickuserhost (nth 0 (erc-parse-user nickuserhost)))))) (provide 'erc-capab) ;;; erc-capab.el ends here ;; Local Variables: ;; generated-autoload-file: "erc-loaddefs.el" ;; End: