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;;; acdw-circe.el --- bespoke circe customizations -*- lexical-binding: t -*-

;;; Commentary:

;; Besoke Circe customizations.

;;; Code:

(require 'circe)
(require 'el-patch)

;;; Functions

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

(defun circe-network-connected-p (network)
  "Return whether circe is connected to 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, asking for confirmation to reconnect."
  (interactive "sNetwork: ")
  (if (or (not (circe-network-connected-p network))
          (y-or-n-p (format "Already connected to %s, reconnect? " network)))
      (circe network)))

(defun circe-current-topic (&optional message)
  "Return the topic of the current channel.
When called with MESSAGE set to non-nil (or interactively), also
message the current topic."
  (interactive "p")
  (let ((topic
         (save-excursion
           (goto-char (point-max))
           (or (re-search-backward
                (rx (group "*** Topic" (+ (not ":")) ": ")
                    (group (+ nonl)))))
           (buffer-substring-no-properties
            (match-beginning 2) (match-end 2)))))
    (when message
      (message "%s" topic))
    topic))

;;; Chat commands

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

(defun circe-command-SLAP (nick)
  "Slap NICK around a bit with a large trout."
  (interactive "sWho we slappin' today, boss? ")
  (circe-command-ME (concat "slaps "
                            (string-trim nick)
                            " around a bit with a large trout")))

;;; Hooks

(defun circe-chat@set-prompt ()
  "Set the prompt to the buffer name, shortening it."
  (interactive)             ; set interactive to unfuck the prompt when need be
  (lui-set-prompt
   (propertize
    (concat
     (acdw-irc/margin-format (buffer-name) "" ">")
     " ")
    'face 'circe-prompt-face
    'read-only t
    'intangible t
    'cursor-intangible t)))

;;; Advices

(defun circe-part@kill-buffer (&rest _)
  "Advice to kill the channel buffer after PART."
  (let ((circe-channel-killed-confirmation nil))
    (kill-buffer)))

(defun circe-quit@kill-buffer (&rest _)
  "Advice to kill all buffers of a server after QUIT."
  ;; `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 _)
  "Advice to kill all Circe related buffers after GQUIT."
  ;; `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))
          (cancel-timer 'irc-send--queue))
        (message "%s: %s" buf circe-server-killed-confirmation)
        (kill-buffer)))))

;;; Patches

(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)))))

;;; Dumb modes

(define-minor-mode circe-cappy-hour-mode
  "ENABLE CAPPY HOUR IN CIRCE!"
  :lighter "CAPPY HOUR"
  (when (derived-mode-p 'circe-chat-mode)
    (if circe-cappy-hour-mode
        (setq-local lui-input-function
                    (lambda (input) (circe--input (upcase input))))
      ;; XXX: It'd be better if this were more general, but whatever.
      (setq-local lui-input-function #'circe--input))))

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