1 ;;; lurk.el --- Little Unified iRc Klient -*- lexical-binding:t -*-
3 ;; Copyright (C) 2021 Tim Vaughan
5 ;; Author: Tim Vaughan <timv@ughan.xyz>
6 ;; Created: 14 June 2021
9 ;; Homepage: http://thelambdalab.xyz/lurk
10 ;; Package-Requires: ((emacs "26"))
12 ;; This file is not part of GNU Emacs.
14 ;; This program is free software: you can redistribute it and/or modify
15 ;; it under the terms of the GNU General Public License as published by
16 ;; the Free Software Foundation, either version 3 of the License, or
17 ;; (at your option) any later version.
19 ;; This program is distributed in the hope that it will be useful,
20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 ;; GNU General Public License for more details.
24 ;; You should have received a copy of the GNU General Public License
25 ;; along with this file. If not, see <http://www.gnu.org/licenses/>.
38 "Little Unified iRc Klient."
41 (defcustom lurk-nick "plugd"
44 (defcustom lurk-default-quit-msg "Bye"
45 "Default quit message when none supplied.")
47 (defcustom lurk-networks
48 '(("libera" "irc.libera.chat" 6697)
49 ("freenode" "chat.freenode.net" 6697)
50 ("tilde" "tilde.chat" 6697)
51 ("mbr" "mbrserver.com" 6667 :notls)
52 ("local" "localhost" 6697))
55 (defcustom lurk-allow-ipv6 nil
56 "Set to non-nil to allow use of IPv6.")
58 (defcustom lurk-show-joins nil
59 "Set to non-nil to be notified of joins, parts and quits.")
65 '((t :inherit default))
66 "Face used for Lurk text.")
69 '((t :inherit org-priority))
70 "Face used for the prompt.")
73 '((t :inherit org-tag))
74 "Face used for the context name in the prompt.")
77 '((t :inherit org-agenda-dimmed-todo-face))
78 "Face used for faded Lurk text.")
81 '((t :inherit font-lock-regexp-grouping-construct))
82 "Face used for Lurk error text.")
87 (defvar lurk-version "Lurk v0.1")
89 (defvar lurk-notice-prefix "-!-")
91 (defvar lurk-error-prefix "!!!")
93 (defvar lurk-prompt-string
94 (propertize "> " 'face 'lurk-prompt))
100 (defvar lurk-response "")
102 (defun lurk-filter (proc string)
103 (dolist (line (split-string (concat lurk-response string) "\n"))
104 (if (string-suffix-p "\r" line)
105 (lurk-eval-msg-string (string-trim line))
106 (setq lurk-response line))))
108 (defun lurk-sentinel (proc string)
109 (unless (equal "open" (string-trim string))
110 (lurk-display-error "Disconnected from server.")
111 (clrhash lurk-contexts)
112 (lurk-set-current-context nil)
114 (cancel-timer lurk-ping-timer)))
116 (defun lurk-start-process (network)
117 (let* ((row (assoc network lurk-networks))
120 (flags (seq-drop row 3)))
121 (make-network-process :name "lurk"
124 :family (if lurk-allow-ipv6 nil 'ipv4)
125 :filter #'lurk-filter
126 :sentinel #'lurk-sentinel
128 :tls-parameters (if (memq :notls flags)
130 (cons 'gnutls-x509pki
131 (gnutls-boot-parameters
132 :type 'gnutls-x509pki
136 (defvar lurk-ping-timer nil)
137 (defvar lurk-ping-period 60)
139 (defun lurk-ping-function ()
140 (lurk-send-msg (lurk-msg nil nil "PING" (car (process-contact (get-process "lurk")))))
141 (setq lurk-ping-timer (run-with-timer lurk-ping-period nil #'lurk-ping-function)))
143 (defun lurk-connect (network)
144 (if (get-process "lurk")
145 (lurk-display-error "Already connected. Disconnect first.")
146 (if (not (assoc network lurk-networks))
147 (lurk-display-error "Network '" network "' is unknown.")
148 (clrhash lurk-contexts)
149 (lurk-set-current-context nil)
150 (lurk-start-process network)
151 (lurk-send-msg (lurk-msg nil nil "USER" lurk-nick 0 "*" lurk-nick))
152 (lurk-send-msg (lurk-msg nil nil "NICK" lurk-nick))
153 (setq lurk-ping-timer (run-with-timer lurk-ping-period nil #'lurk-ping-function)))))
155 (defun lurk-connected-p ()
156 (let ((proc (get-process "lurk")))
157 (and proc (eq (process-status proc) 'open))))
159 (defun lurk-send-msg (msg)
160 (let ((proc (get-process "lurk")))
161 (if (and proc (eq (process-status proc) 'open))
162 (process-send-string proc (concat (lurk-msg->string msg) "\r\n"))
163 (lurk-display-error "No server connection established.")
164 (error "No server connection established"))))
170 (defun lurk--as-string (obj)
172 (with-output-to-string (princ obj))
175 (defun lurk-msg (tags src cmd &rest params)
176 (list (lurk--as-string tags)
177 (lurk--as-string src)
178 (upcase (lurk--as-string cmd))
179 (mapcar #'lurk--as-string
180 (if (and params (listp (elt params 0)))
184 (defun lurk-msg-tags (msg) (elt msg 0))
185 (defun lurk-msg-src (msg) (elt msg 1))
186 (defun lurk-msg-cmd (msg) (elt msg 2))
187 (defun lurk-msg-params (msg) (elt msg 3))
188 (defun lurk-msg-trail (msg)
189 (let ((params (lurk-msg-params msg)))
191 (elt params (- (length params) 1)))))
193 (defvar lurk-msg-regex
195 (opt (: "@" (group (* (not (or "\n" "\r" ";" " ")))))
197 (opt (: ":" (: (group (* (not (any space "!" "@"))))
198 (* (not (any space)))))
200 (group (: (* (not whitespace))))
202 (opt (group (+ not-newline))))
203 "Regex used to parse IRC messages.
204 Note that this regex is incomplete. Noteably, we discard the non-nick
205 portion of the source component of the message, as LURK doesn't use this.")
207 (defun lurk-string->msg (string)
208 (if (string-match lurk-msg-regex string)
209 (let* ((tags (match-string 1 string))
210 (src (match-string 2 string))
211 (cmd (upcase (match-string 3 string)))
212 (params-str (match-string 4 string))
215 (let* ((idx (cl-search ":" params-str))
216 (l (split-string (string-trim (substring params-str 0 idx))))
217 (r (if idx (list (substring params-str (+ 1 idx))) nil)))
220 (apply #'lurk-msg (append (list tags src cmd) params)))
221 (error "Failed to parse string " string)))
223 (defun lurk--filtered-join (&rest args)
224 (string-join (seq-filter (lambda (el) el) args) " "))
226 (defun lurk-msg->string (msg)
227 (let ((tags (lurk-msg-tags msg))
228 (src (lurk-msg-src msg))
229 (cmd (lurk-msg-cmd msg))
230 (params (lurk-msg-params msg)))
232 (if tags (concat "@" tags) nil)
233 (if src (concat ":" src) nil)
235 (if (> (length params) 1)
236 (string-join (seq-take params (- (length params) 1)) " ")
238 (if (> (length params) 0)
239 (concat ":" (elt params (- (length params) 1)))
246 (defvar lurk-current-context nil)
247 (defvar lurk-contexts (make-hash-table :test #'equal))
249 (defun lurk-add-context (name)
250 (puthash name nil lurk-contexts))
252 (defun lurk-del-context (name)
253 (remhash name lurk-contexts))
255 (defun lurk-get-context-users (name)
256 (gethash name lurk-contexts))
258 (defun lurk-add-context-users (context users)
261 (gethash context lurk-contexts))
264 (defun lurk-del-context-user (context user)
266 (remove user (gethash context lurk-contexts))
269 (defun lurk-del-user (user)
270 (dolist (context (lurk-get-context-list))
271 (lurk-del-context-user context user)))
273 (defun lurk-rename-user (old-nick new-nick)
274 (dolist (context (lurk-get-context-list))
275 (lurk-del-context-user context old-nick)
276 (lurk-add-context-users context (list new-nick))))
278 (defun lurk-get-context-type (name)
280 ((string-prefix-p "#" name) 'channel)
281 ((string-match-p (rx (or "." "localhost")) name) 'host)
284 (defun lurk-get-context-list ()
286 (maphash (lambda (key val)
287 (cl-pushnew key res))
291 (defun lurk-get-next-context (&optional prev)
292 (if lurk-current-context
293 (let* ((context-list (if prev
294 (reverse (lurk-get-context-list))
295 (lurk-get-context-list)))
296 (context-list* (member lurk-current-context context-list)))
297 (if (> (length context-list*) 1)
302 (defun lurk-set-current-context (context)
303 (setq lurk-current-context context)
304 (lurk-highlight-context context))
306 (defun lurk-cycle-contexts (&optional rev)
307 (if lurk-current-context
309 (lurk-set-current-context (lurk-get-next-context rev))
310 (lurk-render-prompt))
311 (lurk-display-error "No channels joined.")))
313 (defun lurk-cycle-contexts-forward ()
315 (lurk-cycle-contexts))
317 (defun lurk-cycle-contexts-reverse ()
319 (lurk-cycle-contexts t))
324 (defun lurk-render-prompt ()
325 (with-current-buffer "*lurk*"
326 (let ((update-point (= lurk-input-marker (point)))
327 (update-window-points (mapcar (lambda (w)
328 (list (= (window-point w) lurk-input-marker)
330 (get-buffer-window-list nil nil t))))
332 (set-marker-insertion-type lurk-prompt-marker nil)
333 (set-marker-insertion-type lurk-input-marker t)
334 (let ((inhibit-read-only t))
335 (delete-region lurk-prompt-marker lurk-input-marker)
336 (goto-char lurk-prompt-marker)
338 (propertize (if lurk-current-context
343 (propertize lurk-prompt-string
347 (set-marker-insertion-type lurk-input-marker nil))
349 (goto-char lurk-input-marker))
350 (dolist (v update-window-points)
352 (set-window-point (cadr v) lurk-input-marker))))))
354 (defvar lurk-prompt-marker nil
355 "Marker for prompt position in LURK buffer.")
357 (defvar lurk-input-marker nil
358 "Marker for prompt position in LURK buffer.")
360 (defun lurk-setup-buffer ()
361 (with-current-buffer (get-buffer-create "*lurk*")
362 (setq-local scroll-conservatively 1)
363 (if (markerp lurk-prompt-marker)
364 (set-marker lurk-prompt-marker (point-max))
365 (setq lurk-prompt-marker (point-max-marker)))
366 (if (markerp lurk-input-marker)
367 (set-marker lurk-input-marker (point-max))
368 (setq lurk-input-marker (point-max-marker)))
369 (goto-char (point-max))
370 (lurk-render-prompt)))
373 ;;; Output formatting and highlighting
376 ;; Partially-implemented idea: the face text property can be
377 ;; a list of faces, applied in order. By assigning each context
378 ;; a unique list and keeping track of these in a hash table, we can
379 ;; easily switch the face corresponding to a particular context
380 ;; by modifying the elements of this list.
382 ;; More subtly, we make only the cdrs of this list shared among
383 ;; all text of a given context, allowing the cars to be different
384 ;; and for different elements of the context-specific text to have
385 ;; different styling.
387 ;; Additionally, we can allow selective hiding of contexts via
388 ;; the buffer-invisibility-spec.
390 (defvar lurk-context-facelists (make-hash-table :test 'equal)
391 "List of seen contexts and associated face lists.")
393 (defun lurk-get-context-facelist (context)
394 (let ((facelist (gethash context lurk-context-facelists)))
396 (setq facelist (list 'lurk-text))
397 (puthash context facelist lurk-context-facelists))
400 (defun lurk-display-string (context &rest strings)
401 (with-current-buffer (get-buffer-create "*lurk*")
403 (goto-char lurk-prompt-marker)
404 (let ((inhibit-read-only t)
405 (old-pos (marker-position lurk-prompt-marker))
406 (adaptive-fill-regexp (rx (= 6 anychar)))
408 (context-atom (if context (intern context) nil)))
409 (insert-before-markers
410 (propertize (concat (format-time-string "%H:%M") " ")
411 'face (lurk-get-context-facelist context)
414 'invisible context-atom
415 'help-echo (concat "Context: " (or context "none")))
416 (propertize (concat (apply #'concat strings) "\n")
417 'face (lurk-get-context-facelist context)
420 'invisible context-atom
421 'help-echo (concat "Context: " (or context "none"))))
422 (fill-region old-pos lurk-prompt-marker nil t)))))
424 (defun lurk-display-message (from to text)
425 (let ((context (if (eq 'channel (lurk-get-context-type to))
427 (if (equal to lurk-nick) from to))))
430 (pcase (lurk-get-context-type to)
431 ('channel (concat to " <" from "> " text))
432 ('nick (concat "[" from " -> " to "] " text))
434 (error "Unsupported context type"))))))
436 (defun lurk-display-notice (context &rest notices)
439 lurk-notice-prefix " "
440 (apply #'concat notices)))
442 (defun lurk-display-error (&rest messages)
445 lurk-error-prefix " "
446 (apply #'concat messages)))
448 (defun lurk-highlight-context (context)
450 (lambda (this-context facelist)
451 (if (equal this-context context)
452 (setcar facelist 'lurk-text)
453 (setcar facelist 'lurk-faded)))
454 lurk-context-facelists)
455 (force-window-update "*lurk*"))
457 (defun lurk-zoom-in (context)
458 (with-current-buffer "*lurk*"
460 (lambda (this-context _)
461 (let ((this-context-atom (if this-context (intern this-context) nil)))
462 (if (equal this-context context)
463 (remove-from-invisibility-spec this-context-atom)
464 (add-to-invisibility-spec this-context-atom))))
465 lurk-context-facelists)
466 (force-window-update "*lurk*")))
468 (defun lurk-zoom-out ()
469 (with-current-buffer "*lurk*"
471 (lambda (this-context _)
472 (let ((this-context-atom (if this-context (intern this-context) nil)))
473 (remove-from-invisibility-spec this-context-atom)))
474 lurk-context-facelists)
475 (force-window-update "*lurk*")))
477 ;;; Message evaluation
480 (defun lurk-eval-msg-string (string)
481 ;; (lurk-display-string nil string)
482 (let* ((msg (lurk-string->msg string)))
483 (pcase (lurk-msg-cmd msg)
486 (lurk-msg nil nil "PONG" (lurk-msg-params msg))))
487 ;; (lurk-display-notice nil "ping-pong (server initiated)"))
490 ;; (lurk-display-notice nil "ping-pong (client initiated)"))
493 (let* ((params (lurk-msg-params msg))
494 (nick (elt params 0))
495 (text (string-join (seq-drop params 1) " ")))
496 (setq lurk-nick nick)
497 (lurk-display-notice nil text)))
500 (let* ((params (lurk-msg-params msg))
501 (channel (elt params 2))
502 (names (split-string (elt params 3))))
503 (lurk-add-context-users channel names)))
506 (let* ((params (lurk-msg-params msg))
507 (channel (elt params 1)))
510 (lurk--as-string (length (lurk-get-context-users channel)))
511 " users in " channel)))
514 (let* ((params (lurk-msg-params msg))
515 (channel (elt params 1)))
521 (lurk-display-notice nil "Detected 332: "string)
522 (let* ((params (lurk-msg-params msg))
523 (channel (elt params 1))
524 (topic (elt params 2)))
525 (lurk-display-notice channel "Topic: " topic)))
527 ((rx (= 3 (any digit)))
528 (lurk-display-notice nil (mapconcat 'identity (cdr (lurk-msg-params msg)) " ")))
531 (guard (equal lurk-nick (lurk-msg-src msg))))
532 (let ((channel (car (lurk-msg-params msg))))
533 (lurk-add-context channel)
534 (lurk-set-current-context channel)
535 (lurk-display-notice channel "Joining channel " channel)
536 (lurk-render-prompt)))
539 (let ((channel (car (lurk-msg-params msg)))
540 (nick (lurk-msg-src msg)))
541 (lurk-add-context-users channel (list nick))
543 (lurk-display-notice channel nick " joined channel " channel))))
546 (guard (equal lurk-nick (lurk-msg-src msg))))
547 (let ((channel (car (lurk-msg-params msg))))
548 (lurk-display-notice channel "Left channel " channel)
549 (lurk-del-context channel)
550 (if (equal channel lurk-current-context)
551 (lurk-set-current-context (lurk-get-next-context)))
552 (lurk-render-prompt)))
555 (let ((channel (car (lurk-msg-params msg)))
556 (nick (lurk-msg-src msg)))
557 (lurk-del-context-user channel nick)
559 (lurk-display-notice channel nick " left channel " channel))))
562 (let ((nick (lurk-msg-src msg))
563 (reason (mapconcat 'identity (lurk-msg-params msg) " ")))
566 (lurk-display-notice nil nick " quit: " reason))))
569 (guard (equal lurk-nick (lurk-msg-src msg))))
570 (setq lurk-nick (car (lurk-msg-params msg)))
571 (lurk-display-notice nil "Set nick to " lurk-nick))
574 (let ((old-nick (lurk-msg-src msg))
575 (new-nick (car (lurk-msg-params msg))))
576 (lurk-display-notice nil old-nick " is now known as " new-nick)
577 (lurk-rename-user old-nick new-nick)))
580 (let ((nick (lurk-msg-src msg))
581 (channel (car (lurk-msg-params msg)))
582 (text (cadr (lurk-msg-params msg))))
584 ((rx (: "\01VERSION "
585 (let version (* (not "\01")))
587 (lurk-display-notice nil "CTCP version reply from " nick ": " version))
589 (lurk-display-notice nil text)))))
592 (let* ((from (lurk-msg-src msg))
593 (params (lurk-msg-params msg))
595 (text (cadr params)))
598 (let ((version-string (concat lurk-version " - running on GNU Emacs " emacs-version)))
599 (lurk-send-msg (lurk-msg nil nil "NOTICE"
600 (list from (concat "\01VERSION "
603 (lurk-display-notice nil "CTCP version request received from " from))
605 ((rx (let ping (: "\01PING " (* (not "\01")) "\01")))
606 (lurk-send-msg (lurk-msg nil nil "NOTICE" (list from ping)))
607 (lurk-display-notice "CTCP ping received from " from))
610 (lurk-display-notice "CTCP userinfo request from " from " (no response sent)"))
613 (if (and (equal from "BitBot")
614 (equal to "##moshpit")
615 (cl-search "\\_o< QUACK!" text))
616 (lurk-send-msg (lurk-msg nil nil "PRIVMSG" to ",bef")))
617 (lurk-display-message from to text)))))
619 (lurk-display-notice nil (lurk-msg->string msg))))))
625 (defun lurk-enter-string (string)
626 (if (string-prefix-p "/" string)
627 (pcase (substring string 1)
628 ((rx (: "CONNECT " (let network (* not-newline))))
629 (lurk-display-notice nil "Attempting to connect to " network "...")
630 (lurk-connect network))
632 ((rx (: "TOPIC " (let new-topic (* not-newline))))
633 (lurk-send-msg (lurk-msg nil nil "TOPIC" lurk-current-context new-topic)))
635 ((rx (: "ME " (let action (* not-newline))))
636 (lurk-send-msg (lurk-msg nil nil "PRIVMSG"
637 (list lurk-current-context
638 (concat "\01ACTION " action "\01"))))
639 (lurk-display-action lurk-nick action))
641 ((rx (: "VERSION" " " (let nick (+ (not whitespace)))))
642 (lurk-send-msg (lurk-msg nil nil "PRIVMSG"
643 (list nick "\01VERSION\01")))
644 (lurk-display-notice nil "CTCP version request sent to " nick))
646 ((rx "PART" (opt (: " " (let channel (* not-newline)))))
647 (if (or lurk-current-context channel)
648 (lurk-send-msg (lurk-msg nil nil "PART" (if channel
650 lurk-current-context)))
651 (lurk-display-error "No current channel to leave.")))
653 ((rx "QUIT" (opt (: " " (let quit-msg (* not-newline)))))
654 (lurk-send-msg (lurk-msg nil nil "QUIT"
655 (or quit-msg lurk-default-quit-msg))))
657 ((rx (: "NICK" (* whitespace) string-end))
658 (lurk-display-notice nil "Current nick: " lurk-nick))
660 ((rx (: "NICK" (+ whitespace) (let nick (+ (not whitespace)))))
661 (if (lurk-connected-p)
662 (lurk-send-msg (lurk-msg nil nil "NICK" nick))
663 (setq lurk-nick nick)
664 (lurk-display-notice nil "Set default nick to '" nick "'")))
667 (let to (* (not whitespace)))
669 (let text (* not-newline)))
670 (lurk-send-msg (lurk-msg nil nil "PRIVMSG" to text))
671 (lurk-display-message lurk-nick to text))
673 ((rx (: (let cmd-str (+ (not whitespace)))
674 (opt (: " " (let params-str (* not-newline))))))
675 (lurk-send-msg (lurk-msg nil nil (upcase cmd-str)
677 (split-string params-str)
680 (unless (string-empty-p string)
681 (if lurk-current-context
683 (lurk-send-msg (lurk-msg nil nil "PRIVMSG"
686 (lurk-display-message lurk-nick lurk-current-context string))
687 (lurk-display-error "No current context.")))))
690 "Enter current contents of line after prompt."
692 (with-current-buffer "*lurk*"
693 (let ((line (buffer-substring lurk-input-marker (point-max))))
694 (let ((inhibit-read-only t))
695 (delete-region lurk-input-marker (point-max)))
696 (lurk-enter-string line))))
702 (defvar lurk-mode-map
703 (let ((map (make-sparse-keymap)))
704 (define-key map (kbd "RET") 'lurk-enter)
705 (define-key map (kbd "<C-tab>") 'lurk-cycle-contexts-forward)
706 (define-key map (kbd "<C-S-tab>") 'lurk-cycle-contexts-reverse)
709 (define-derived-mode lurk-mode text-mode "lurk"
710 "Major mode for LURK.")
712 (when (fboundp 'evil-set-initial-state)
713 (evil-set-initial-state 'lurk-mode 'insert))
715 ;;; Main start procedure
719 "Switch to *lurk* buffer."
721 (if (get-buffer "*lurk*")
722 (switch-to-buffer "*lurk*")
723 (switch-to-buffer "*lurk*"))
729 ;;; lurk.el ends here