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;;; erc-ezbounce.el --- Handle EZBounce bouncer commands
;; Copyright (C) 2002, 2004, 2006-2020 Free Software Foundation, Inc.
;; Author: Andreas Fuchs <asf@void.at>
;; Maintainer: Amin Bandali <bandali@gnu.org>
;; Keywords: comm
;; 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 <https://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(require 'erc)
(defgroup erc-ezbounce nil
"Interface to the EZBounce IRC bouncer (a virtual IRC server)."
:group 'erc)
(defcustom erc-ezb-regexp "^ezbounce!srv$"
"Regexp used by the EZBouncer to identify itself to the user."
:group 'erc-ezbounce
:type 'regexp)
(defcustom erc-ezb-login-alist '()
"Alist of logins suitable for the server we're connecting to.
The alist's format is as follows:
(((server . port) . (username . password))
((server . port) . (username . password))
...)"
:group 'erc-ezbounce
:type '(repeat
(cons (cons :tag "Server"
string
string)
(cons :tag "Login"
string
string))))
(defvar erc-ezb-action-alist '(("^\\[awaiting login/pass command\\]$" . erc-ezb-identify)
("^\\[use /quote CONN <server> to connect\\]$" . erc-ezb-select)
("^ID +IRC NICK +TO +TIME$" . erc-ezb-init-session-list)
("^$" . erc-ezb-end-of-session-list)
(".*" . erc-ezb-add-session))
"Alist of actions to take on NOTICEs from EZBounce.")
(defvar erc-ezb-session-list '()
"List of detached EZBounce sessions.")
(make-variable-buffer-local 'erc-ezb-session-list)
(defvar erc-ezb-inside-session-listing nil
"Indicate whether current notices are expected to be EZB session listings.")
;;;###autoload
(defun erc-cmd-ezb (line &optional force)
"Send EZB commands to the EZBouncer verbatim."
(erc-server-send (concat "EZB " line)))
(put 'erc-cmd-EZB 'do-not-parse-args t)
;;;###autoload
(defun erc-ezb-get-login (server port)
"Return an appropriate EZBounce login for SERVER and PORT.
Look up entries in `erc-ezb-login-alist'. If the username or password
in the alist is nil, prompt for the appropriate values."
(let ((login (cdr (assoc (cons server port) erc-ezb-login-alist))))
(when login
(let ((username (car login))
(password (cdr login)))
(when (null username)
(setq username (read-from-minibuffer (format "EZBounce user name for %s:%s: " server port))))
(when (null password)
(setq password (read-passwd (format "EZBounce password for %s:%s: " server port))))
(cons username password)))))
;;;###autoload
(defun erc-ezb-lookup-action (message)
(let ((function-alist erc-ezb-action-alist)
found)
(while (and (not found)
function-alist)
(let ((regexp (caar function-alist))
(function (cdar function-alist)))
(when (string-match regexp message)
(setq found function))
(setq function-alist (cdr function-alist))))
found))
;;;###autoload
(defun erc-ezb-notice-autodetect (proc parsed)
"React on an EZBounce NOTICE request."
(let* ((sender (erc-response.sender parsed))
(message (erc-response.contents parsed))
(function (erc-ezb-lookup-action message)))
(when (and (string-match erc-ezb-regexp sender)
function)
(funcall function message)))
nil)
;;;###autoload
(defun erc-ezb-identify (message)
"Identify to the EZBouncer server."
(let ((login (erc-ezb-get-login erc-session-server (erc-port-to-string erc-session-port))))
(unless (null login)
(let ((username (car login))
(pass (cdr login)))
(erc-server-send (concat "LOGIN " username " " pass))))))
;;;###autoload
(defun erc-ezb-init-session-list (message)
"Reset the EZBounce session list to nil."
(setq erc-ezb-session-list nil)
(setq erc-ezb-inside-session-listing t))
;;;###autoload
(defun erc-ezb-end-of-session-list (message)
"Indicate the end of the EZBounce session listing."
(setq erc-ezb-inside-session-listing nil))
;;;###autoload
(defun erc-ezb-add-session (message)
"Add an EZBounce session to the session list."
(when (and erc-ezb-inside-session-listing
(string-match "^\\([^ \n]+\\) +\\([^ \n]+\\) +\\([^ \n]+\\) +\\([^ \n]+\\)$" message))
(let ((id (match-string 1 message))
(nick (match-string 2 message))
(to (match-string 3 message)))
(add-to-list 'erc-ezb-session-list (list id nick to)))))
;;;###autoload
(defun erc-ezb-select (message)
"Select an IRC server to use by EZBounce, in ERC style."
(unless (and erc-ezb-session-list
(erc-ezb-select-session))
(let* ((server (read-from-minibuffer
"IRC server: " "" nil nil 'erc-server-history-list))
(port
(erc-string-to-port
(read-from-minibuffer "IRC port: "
(erc-port-to-string "6667")))))
(erc-server-send (format "CONN %s %s" server port)))))
;;;###autoload
(defun erc-ezb-select-session ()
"Select a detached EZBounce session."
(let ((session (completing-read "Existing Session (RET to enter a new one): "
erc-ezb-session-list)))
(if (string= session "")
nil
(erc-server-send (format "REATTACH %s" session)))))
;;;###autoload
(defun erc-ezb-initialize ()
"Add EZBouncer convenience functions to ERC."
(add-hook 'erc-server-NOTICE-functions 'erc-ezb-notice-autodetect))
(provide 'erc-ezbounce)
;;; erc-ezbounce.el ends here
;; Local Variables:
;; generated-autoload-file: "erc-loaddefs.el"
;; End:
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