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;;; acdw-irc.el -*- lexical-binding: t; coding: utf-8-unix -*-

(require 's nil :noerror)

(defgroup acdw-irc nil
  "Customizations for IRC."
  :group 'applications)

(defcustom acdw-irc/left-margin 16
  "The size of the margin for nicks, etc. on the left."
  :type 'integer)

(defcustom acdw-irc/pre-nick ""
  "What to show before a nick."
  :type 'string)

(defcustom acdw-irc/post-nick " | "
  "What to show after a nick."
  :type 'string)

(defcustom acdw-irc/pre-my-nick "-"
  "What to show before the current user's nick."
  :type 'string)

(defcustom acdw-irc/post-my-nick "-> "
  "What to show after the current user's nick."
  :type 'string)

(defcustom acdw-irc/ellipsis "~"
  "The ellipsis for when a string is too long."
  :type 'string)


;;; Convenience functions (I don't want to /depend/ on s.el)

(if (fboundp 's-repeat)
    (defalias 'repeat-string 's-repeat)
  (defun repeat-string (num s)
    "Make a string of STR repeated NUM times.
Stolen from s.el."
    (declare (pure t) (side-effect-free t))
    (let (ss)
      (while (> num 0)
        (setq ss (cons s ss))
        (setq num (1- num)))
      (apply 'concat ss))))


;;; IRC stuff

(defun acdw-irc/margin-format (str &optional before after alignment)
  "Print STR to fit in `acdw-irc/left-margin'.
Optional arguments BEFORE and AFTER specify strings to go
... before and after the string.  ALIGNMENT aligns left on nil
and right on t."
  (let* ((before (or before ""))
         (after (or after ""))
         (str-length (length str))
         (before-length (length before))
         (after-length (length after))
         (max-length (- acdw-irc/left-margin 1 (+ before-length after-length)))
         (left-over (max 0 (- max-length str-length))))
    (format "%s%s%s%s%s"
            before
            (if alignment (repeat-string left-over " ") "")
            (truncate-string max-length str acdw-irc/ellipsis)
            (if alignment "" (repeat-string left-over " "))
            after)))

(defun irc ()
  "Connect to all IRC networks in `circe-network-options'."
  (interactive)
  (dolist (network (mapcar #'car circe-network-options))
    (circe-maybe-connect network)))

(el-patch-feature circe)
(with-eval-after-load 'circe
  (defvar circe-server-buffer-action 'pop-to-buffer-same-window
    "What to do with `circe-server' buffers when created.")
  
  (el-patch-defun circe (network-or-server &rest server-options)
    "Connect to IRC.

Connect to the given network specified by NETWORK-OR-SERVER.

When this function is called, it collects options from the
SERVER-OPTIONS argument, the user variable
`circe-network-options', and the defaults found in
`circe-network-defaults', in this order.

If NETWORK-OR-SERVER is not found in any of these variables, the
argument is assumed to be the host name for the server, and all
relevant settings must be passed via SERVER-OPTIONS.

All SERVER-OPTIONS are treated as variables by getting the string
\"circe-\" prepended to their name. This variable is then set
locally in the server buffer.

See `circe-network-options' for a list of common options."
    (interactive (circe--read-network-and-options))
    (let* ((options (circe--server-get-network-options network-or-server
                                                       server-options))
           (buffer (circe--server-generate-buffer options)))
      (with-current-buffer buffer
        (circe-server-mode)
        (circe--server-set-variables options)
        (circe-reconnect))
      (el-patch-swap (pop-to-buffer-same-window buffer)
                     (funcall circe-server-buffer-action buffer)))))

(defun circe-network-connected-p (network)
  "Return non-nil if there's any Circe server-buffer whose
`circe-server-netwok' is NETWORK."
  (catch 'return
    (dolist (buffer (circe-server-buffers))
      (with-current-buffer buffer
        (if (string= network circe-server-network)
            (throw 'return t))))))

(defun circe-maybe-connect (network)
  "Connect to NETWORK, but ask user for confirmation if it's
already been connected to."
  (interactive "sNetwork: ")
  (if (or (not (circe-network-connected-p network))
          (y-or-n-p (format "Already connected to %s, reconnect?" network)))
      (circe network)))

;; the most important command ever.
(defun circe-command-SLAP (nick)
  "Slap NICK around with a large trout."
  (interactive "sNick: ")
  (if (not circe-chat-target)
      (circe-display-server-message "No target for current buffer")
    (let ((line    (concat "slaps " nick " around a bit with a large trout")))
      (circe-display 'circe-format-self-action
                     :body line 
                     :nick (circe-nick))
      (irc-send-ctcp (circe-server-process)
                     circe-chat-target
                     "ACTION" line))))

(defun circe-command-SHORTEN (url)
  "Shorten URL using `0x0-shorten-uri'."
  (interactive "sURL to shorten: ")
  ;; TODO: enable /shorten URL comment syntax
  (let ((short-url (0x0-shorten-uri (0x0--choose-server) url)))
    (circe-command-SAY short-url)))

(defun circe-part@kill-buffer (&rest _)
  (let ((circe-channel-killed-confirmation nil))
    (kill-buffer)))

(defun circe-quit@kill-buffer (&rest _)
  ;; `circe-server-killed-confirmation' set to nil, and manually
  ;; deleting all chat buffers, pending Github issue #402
  ;; (https://github.com/emacs-circe/circe/issues/402)
  (let ((circe-server-killed-confirmation nil))
    (with-circe-server-buffer
      (dolist (buf (circe-server-chat-buffers))
        (let ((circe-channel-killed-confirmation nil))
          (kill-buffer buf)))
      (kill-buffer))))

(defun circe-gquit@kill-buffer (&rest _)
  ;; `circe-server-killed-confirmation' set to nil, and manually
  ;; deleting all chat buffers, pending Github issue #402
  ;; (https://github.com/emacs-circe/circe/issues/402)
  (let ((circe-server-killed-confirmation nil))
    (dolist (buf (circe-server-buffers))
      (with-current-buffer buf
        (dolist (buf (circe-server-chat-buffers))
          (let ((circe-channel-killed-confirmation nil))
            (kill-buffer buf)))
        (message "%s: %s" buf circe-server-killed-confirmation)
        (kill-buffer)))))


(provide 'acdw-irc)
;;; acdw-irc.el ends here