;;; -*-emacs-lisp-*-
;;;
;;; ERC configuration

(setq erc-nick "mdw"
      erc-user-full-name "Mark Wooding")

(if (not (memq 'truncate erc-modules))
    (setq erc-modules (cons 'truncate erc-modules)))

(setq erc-fill-column 76
      erc-timestamp-right-column 68
      erc-fill-prefix "   "
      erc-max-buffer-size (* 60 3000))

(load "~/.erc-local.el")

(setq erc-track-exclude-types '("NICK" "JOIN" "PART"))

(setq erc-auto-query 'buffer)

(defun mdw-erc-turn-off-truncate-lines ()
  (setq truncate-lines nil
	truncate-partial-with-windows nil
	word-wrap t
	wrap-prefix (concat (propertize "    " 'face 'erc-prompt-face)
			    " ")))
(add-hook 'erc-mode-hook 'mdw-erc-turn-off-truncate-lines)

(setq erc-autojoin t
      erc-autojoin-domain-only nil
      erc-autojoin-channels-alist
      '(("irc.ssdis.loc" "#devel" "#jukebox" "#nextgen")
	("cam.irc.devel.ncipher.com"
	 "#devel" "#jukebox" "#nextgen" "#sec-team")
	("chiark.greenend.org.uk" "#chiark")
	("irc.distorted.org.uk" "#distorted" "#jukebox")
	("irc.hstg.corp.good.com" "#hstg")))

(defvar mdw-erc-auto-greet-bots-alist nil
  "*Alist of (SERVER-REGEXP BOT-NICK MESSAGE-FORM).
Evaluate MESSAGE-FORM and sent to BOT-NICK when connected to a server which
matches SERVER-REGEXP.")

(defvar mdw-erc-ircop-alist nil
  "*Alist of (SERVER-REGEXP ACCT PASSWD).
Login details for claiming server admin rights.")

(defun mdw-define-bot-greeting (server bot greeting)
  "Define a new bot greeting."
  (setq mdw-erc-auto-greet-bots-alist
	(cons (list server bot greeting)
	      (remove* server mdw-erc-auto-greet-bots-alist
		       :test #'string= :key #'car))))
(defun mdw-add-ircop-credentials (server acct passwd)
  "Define a new set of `ircop' credentials."
  (setq mdw-erc-ircop-alist
	(cons (list server acct passwd)
	      (remove* server mdw-erc-ircop-alist
		       :test #'string= :key #'car)))))
(load "~/.erc-auth.el")

(defun mdw-assoc-regexp (regexp alist)
  "Return the association in ALIST whose car matches REGEXP."
  (let ((answer nil))
    (dolist (l alist)
      (when (string-match (car l) regexp)
	(setq answer l)))
    answer))

(defun mdw-erc-auto-greet-bots (server nick)
  "Send greeting message to bots."
  (let ((a (mdw-assoc-regexp server mdw-erc-auto-greet-bots-alist)))
    (when a
      (let ((bot (cadr a))
	    (message (caddr a)))
	(erc-server-send (concat "PRIVMSG " bot " :" message))))))
(add-hook 'erc-after-connect 'mdw-erc-auto-greet-bots)

(defun erc-cmd-GREET ()
  "Send greeting messages, according to `mdw-erc-auto-greet-bots-alist'."
  (mdw-erc-auto-greet-bots erc-session-server (erc-current-nick)))

(defun erc-cmd-IRCOP ()
  "Claim `ircop' privileges."
  (let ((a (mdw-assoc-regexp erc-session-server mdw-erc-ircop-alist)))
    (when a
      (let ((acct (cadr a))
	    (passwd (caddr a)))
	(erc-server-send (concat "OPER " acct " " passwd))))))