X-Git-Url: https://thelambdalab.xyz/gitweb/index.cgi?a=blobdiff_plain;f=lirc.el;h=e33f6cf8c4b544708a03e97de96d47672a9c217f;hb=03b441c5ba7075419f91a84427b1afa1093f5d22;hp=c9dc91b2ed238a230141b0bdd8f634b5302cc0c8;hpb=9d8a20ea72ce8b050b69a33a7461e4a94db7691a;p=lurk.git

diff --git a/lirc.el b/lirc.el
index c9dc91b..e33f6cf 100644
--- a/lirc.el
+++ b/lirc.el
@@ -1,4 +1,4 @@
-;;; lirc.el --- Lambdalabs irc client  -*- lexical-binding:t -*-
+;;; lirc.el --- Lightweight irc client  -*- lexical-binding:t -*-
 
 ;; Copyright (C) 2021 Tim Vaughan
 
@@ -28,7 +28,8 @@
 
 ;;; Code:
 
-(provide 'lerc)
+(provide 'lirc)
+
 
 ;;; Customizations
 ;;
@@ -43,58 +44,150 @@
   "Default full name.")
 (defcustom lirc-user-name "plugd"
   "Default user name.")
-(defcustom lirc-host "localhost"
-  "Default server.")
-(defcustom lirc-port 6667
-  "Default port.")
 
-(defcustom lirc-prompt "> "
-  "Prompt.")
+(defcustom lirc-networks
+  '(("libera" "irc.libera.chat" 6697)
+    ("freenode" "chat.freenode.net" 6697)
+    ("local" "localhost" 6697))
+  "IRC networks.")
+
+;;; Faces
+;;
+
+(defface lirc-text
+  '((t :inherit font-lock-preprocessor-face))
+  "Face used for Lirc text.")
+
+(defface lirc-your-nick
+  '((t :inherit font-lock-constant-face))
+  "Face used for highlighting your nick.")
+
+(defface lirc-prompt
+  '((t :inherit org-level-2))
+  "Face used for the prompt.")
+
+(defface lirc-channel
+  '((t :inherit org-list-dt))
+  "Face used for the channel name in the prompt.")
+
+(defface lirc-faded
+  '((t :inherit font-lock-preprocessor-face))
+  "Face used for faded Lirc text.")
+
+(defface lirc-bold
+  '((t :inherit font-lock-function-name-face))
+  "Face used for bold Lirc text.")
+
+(defface lirc-error
+  '((t :inherit font-lock-regexp-grouping-construct))
+  "Face used for Lirc error text.")
+
+;;; Global variables
+;;
+
+(defvar lirc-version "Lirc v0.1")
+
+(defvar lirc-notice-prefix
+  (concat
+   (propertize
+    "-" 'face 'lirc-faded)
+   (propertize
+    "!" 'face 'lirc-bold)
+   (propertize
+    "-" 'face 'lirc-faded)))
+
+(defvar lirc-error-prefix
+  (propertize "!!!" 'face 'lirc-error))
+
+
+(defvar lirc-prompt-string
+  (propertize "> " 'face 'lirc-prompt))
+
+
+;;; Network process
+;;
 
 (defvar lirc-response "")
 
 (defun lirc-filter (proc string)
   (dolist (line (split-string (concat lirc-response string) "\n"))
     (if (string-suffix-p "\r" line)
-        (lirc-process-msg-string (string-trim line))
+        (lirc-eval-msg-string (string-trim line))
       (setq lirc-response line))))
 
-(defun lirc-get-process ()
+
+(defun lirc-start-process (network)
+  (let* ((row (assoc network lirc-networks))
+         (host (elt row 1))
+         (port (elt row 2)))
+    (make-network-process :name "lirc"
+                          :host host
+                          :service port
+                          :filter #'lirc-filter
+                          :nowait nil
+                          :tls-parameters (cons 'gnutls-x509pki
+                                                (gnutls-boot-parameters
+                                                 :type 'gnutls-x509pki
+                                                 :hostname host))
+                          :buffer "*lirc*")))
+
+
+(defun lirc-connect (network)
+  (if (get-process "lirc")
+      (lirc-display-error "Already connected.  Disconnect first.")
+    (setq lirc-current-context nil)
+    (clrhash lirc-contexts)
+    (lirc-start-process network)
+    (lirc-send-msg (lirc-msg nil nil "USER" lirc-user-name 0 "*" lirc-full-name))
+    (lirc-send-msg (lirc-msg nil nil "NICK" lirc-nick))))
+
+(defun lirc-send-msg (msg)
   (let ((proc (get-process "lirc")))
     (if (and proc (eq (process-status proc) 'open))
-        proc
-      (make-network-process :name "lirc"
-                            :host lirc-host
-                            :service lirc-port
-                            :filter #'lirc-filter
-                            :nowait t
-                            :buffer "*lirc*"))))
-
-(defun lirc-as-string (obj)
+        (process-send-string proc (concat (lirc-msg->string msg) "\r\n"))
+      (lirc-display-error "No server connection established.")
+      (error "No server connection established"))))
+
+
+;;; Server messages
+;;
+
+(defun lirc--as-string (obj)
   (if obj
       (with-output-to-string (princ obj))
     nil))
 
 (defun lirc-msg (tags src cmd &rest params)
-  (list (lirc-as-string tags)
-        (lirc-as-string src)
-        (upcase (lirc-as-string cmd))
-        (mapcar #'lirc-as-string params)))
+  (list (lirc--as-string tags)
+        (lirc--as-string src)
+        (upcase (lirc--as-string cmd))
+        (mapcar #'lirc--as-string
+                (if (and params (listp (elt params 0)))
+                    (elt params 0)
+                  params))))
 
 (defun lirc-msg-tags (msg) (elt msg 0))
 (defun lirc-msg-src (msg) (elt msg 1))
 (defun lirc-msg-cmd (msg) (elt msg 2))
 (defun lirc-msg-params (msg) (elt msg 3))
+(defun lirc-msg-trail (msg)
+  (let ((params (lirc-msg-params msg)))
+    (if params
+        (elt params (- (length params) 1)))))
 
 (defvar lirc-msg-regex
   (rx
    (opt (: "@" (group (* (not (or "\n" "\r" ";" " ")))))
         (* whitespace))
-   (opt (: ":" (group (* (not (or "\n" "\r" " ")))))
+   (opt (: ":" (: (group (* (not (any space "!" "@"))))
+                  (* (not (any space)))))
         (* whitespace))
    (group (: (* (not whitespace))))
    (* whitespace)
-   (opt (group (+ not-newline)))))
+   (opt (group (+ not-newline))))
+  "Regex used to parse IRC messages.
+Note that this regex is incomplete.  Noteably, we discard the non-nick
+portion of the source component of the message, as LIRC doesn't use this.")
 
 (defun lirc-string->msg (string)
   (if (string-match lirc-msg-regex string)
@@ -112,56 +205,401 @@
         (apply #'lirc-msg (append (list tags src cmd) params)))
     (error "Failed to parse string " string)))
 
+(defun lirc--filtered-join (&rest args)
+  (string-join (seq-filter (lambda (el) el) args) " "))
+
 (defun lirc-msg->string (msg)
   (let ((tags (lirc-msg-tags msg))
         (src (lirc-msg-src msg))
         (cmd (lirc-msg-cmd msg))
         (params (lirc-msg-params msg)))
-    (concat
-     (if tags (concat "@" tags " ") "")
-     (if src (concat ":" src " ") "")
-     cmd " "
+    (lirc--filtered-join
+     (if tags (concat "@" tags) nil)
+     (if src (concat ":" src) nil)
+     cmd
      (if (> (length params) 1)
          (string-join (seq-take params (- (length params) 1)) " ")
-       "")
+       nil)
      (if (> (length params) 0)
-         (concat " :" (elt params (- (length params) 1)))))))
+         (concat ":" (elt params (- (length params) 1)))
+       nil))))
+
+
+;;; Contexts and users
+;;
+
+(defvar lirc-context-table
+  '((channel lirc-display-channel-message)
+    (nick lirc-display-private-message)
+    (host lirc-diaplay-server-message)))
+
+(defvar lirc-current-context nil)
+(defvar lirc-contexts (make-hash-table :test #'equal))
+
+(defun lirc-add-context (name)
+  (puthash name nil lirc-contexts))
+
+(defun lirc-del-context (name)
+  (remhash name lirc-contexts))
+
+(defun lirc-get-context-users (name)
+  (gethash name lirc-contexts))
+
+(defun lirc-add-context-users (context users)
+  (puthash context
+           (append users
+                   (gethash context lirc-contexts))
+           lirc-contexts))
+
+(defun lirc-del-context-user (context user)
+  (puthash context
+           (remove user (gethash context lirc-contexts))
+           lirc-contexts))
+
+(defun lirc-del-user (user)
+  (dolist (context (lirc-get-context-list))
+    (lirc-del-context-user context user)))
+
+(defun lirc-get-context-type (name)
+  (cond
+   ((string-prefix-p "#" name) 'channel)
+   ((string-match-p (rx (or "." "localhost")) name) 'host)
+   (t 'nick)))
 
-(defun lirc-display-string (string)
+(defun lirc-get-context-list ()
+  (let ((res nil))
+    (maphash (lambda (key val)
+               (cl-pushnew key res))
+             lirc-contexts)
+    res))
+
+(defun lirc-get-next-context ()
+  (if lirc-current-context
+      (let* ((context-list (lirc-get-context-list))
+             (context-list* (member lirc-current-context context-list)))
+        (if (> (length context-list*) 1)
+            (cadr context-list*)
+          (car context-list)))
+    nil))
+    
+
+(defun lirc-cycle-contexts ()
+  (interactive)
+  (if lirc-current-channel
+      (progn
+        (setq lirc-current-channel (lirc-get-channel-next lirc-current-channel))
+        (lirc-render-prompt))
+    (lirc-display-error "No channels joined.")))
+
+
+;;; Buffer
+;;
+
+(defun lirc-display-string (&rest strings)
+  (with-current-buffer (get-buffer-create "*lirc*")
+    (save-excursion
+      (goto-char lirc-prompt-marker)
+      (let ((inhibit-read-only t)
+            (old-pos (marker-position lirc-prompt-marker))
+            (adaptive-fill-regexp (rx (= 6 anychar))))
+        (insert-before-markers
+         (propertize (concat (format-time-string "%H:%M") " ")
+                     'face 'lirc-text
+                     'read-only t)
+         (propertize (concat (apply #'concat strings) "\n")
+                     'read-only t))
+        (fill-region old-pos lirc-prompt-marker)))))
+
+(defun lirc-render-prompt ()
   (with-current-buffer "*lirc*"
-    (let ((inhibit-read-only t))
+    (let ((update-point (= lirc-input-marker (point)))
+          (update-window-points (mapcar (lambda (w)
+                                          (list (= (window-point w) lirc-input-marker)
+                                                w))
+                                        (get-buffer-window-list nil nil t))))
       (save-excursion
-        (goto-char (point-max))
-        (insert string "\n")))))
-
-(defun lirc-process-msg-string (string)
-  (let ((msg (lirc-string->msg string)))
-    (cond
-     ((equal (lirc-msg-cmd msg) "PING")
-      (lirc-send-msg
-       (lirc-msg nil nil "PONG" (lirc-msg-params msg))))
-     (t
-      (lirc-display-string (lirc-msg->string msg))))))
-
-(defun lirc-connect ()
-  (lirc-send-msg (lirc-msg nil nil "USER" lirc-user-name 0 "*" lirc-full-name))
-  (lirc-send-msg (lirc-msg nil nil "NICK" lirc-nick)))
-
-(defun lirc-send-msg (msg)
-  (let ((proc (lirc-get-process)))
-    (process-send-string proc (concat (lirc-msg->string msg) "\r\n"))))
+        (set-marker-insertion-type lirc-prompt-marker nil)
+        (set-marker-insertion-type lirc-input-marker t)
+        (let ((inhibit-read-only t))
+          (delete-region lirc-prompt-marker lirc-input-marker)
+          (goto-char lirc-prompt-marker)
+          (insert
+           (propertize (if lirc-current-context
+                           lirc-current-context
+                         "")
+                       'face 'lirc-context
+                       'read-only t)
+           (propertize lirc-prompt-string
+                       'face 'lirc-prompt
+                       'read-only t
+                       'rear-nonsticky t)))
+        (set-marker-insertion-type lirc-input-marker nil))
+      (if update-point
+          (goto-char lirc-input-marker))
+      (dolist (v update-window-points)
+        (if (car v)
+            (set-window-point (cadr v) lirc-input-marker))))))
   
+(defvar lirc-prompt-marker nil
+  "Marker for prompt position in LIRC buffer.")
+
+(defvar lirc-input-marker nil
+  "Marker for prompt position in LIRC buffer.")
+
+(defun lirc-setup-buffer ()
+  (with-current-buffer (get-buffer-create "*lirc*")
+    (if (markerp lirc-prompt-marker)
+        (set-marker lirc-prompt-marker (point-max))
+      (setq lirc-prompt-marker (point-max-marker)))
+    (if (markerp lirc-input-marker)
+        (set-marker lirc-input-marker (point-max))
+      (setq lirc-input-marker (point-max-marker)))
+    (goto-char (point-max))
+    (lirc-render-prompt)))
+
+
+;;; Output formatting
+;;
+
+(defun lirc-display-message (from to text)
+  (let* ((to-type (lirc-get-context-type to))
+         (display-fun (cadr (assoc to-type lirc-context-table))))
+    (funcall display-fun from to text)))
+
+(defun lirc-display-channel-message (from to text)
+  (lirc-display-string
+   (propertize (concat to
+                       " <" from "> "
+                       text)
+               'face 'lirc-text)))
+               
+
+(defun lirc-display-action (channel-name nick action)
+  (lirc-display-string (concat channel-name
+                               " * "
+                               (propertize (concat nick " " action)
+                                           'face 'lirc-text))))
+
+(defun lirc-display-private-message (from to text)
+  (lirc-display-string
+   (concat
+    (propertize
+     (concat "[" from " -> " to "] "
+             text)
+     'face 'lirc-text))))
+        
+
+(defun lirc-display-notice (&rest notices)
+  (lirc-display-string lirc-notice-prefix " " (apply #'concat notices)))
+
+(defun lirc-display-error (&rest messages)
+  (lirc-display-string lirc-error-prefix " "
+                       (propertize (apply #'concat messages)
+                                   'face 'lirc-error)))
+
+;;; Message evaluation
+;;
+
+(defun lirc-eval-msg-string (string)
+  ;; (lirc-display-string string)
+  (let* ((msg (lirc-string->msg string)))
+    (pcase (lirc-msg-cmd msg)
+      ("PING"
+       (lirc-send-msg
+        (lirc-msg nil nil "PONG" (lirc-msg-params msg)))
+       (lirc-display-notice "ping-pong"))
+
+      ("353" ; NAMEREPLY
+       (let* ((params (lirc-msg-params msg))
+              (channel (elt params 2))
+              (names (split-string (elt params 3))))
+         (lirc-add-context-users channel names)))
+
+      ("366" ; ENDOFNAMES
+       (lirc-display-notice
+        (lirc-as-string (length (lirc-get-context-users lirc-current-context)))
+        " users in " lirc-current-context))
+
+      ((rx (= 3 (any digit)))
+       (lirc-display-notice (mapconcat 'identity (cdr (lirc-msg-params msg)) " ")))
+
+      ((and "JOIN"
+            (guard (equal lirc-nick (lirc-msg-src msg))))
+       (let ((channel-name (car (lirc-msg-params msg))))
+         (lirc-add-context channel-name)
+         (setq lirc-current-context channel-name)
+         (lirc-display-notice "Joining channel " channel-name)
+         (lirc-render-prompt)))
+
+      ("JOIN"
+       (let ((channel-name (car (lirc-msg-params msg)))
+             (nick (lirc-msg-src msg)))
+         (lirc-add-context-users channel-name (list nick))
+         (lirc-display-notice nick " joined channel " channel-name)))
+
+      ((and "PART"
+            (guard (equal lirc-nick (lirc-msg-src msg))))
+       (let ((channel-name (car (lirc-msg-params msg))))
+         (lirc-display-notice "Left channel " channel-name)
+         (lirc-del-context channel-name)
+         (if (equal channel-name lirc-current-context)
+             (setq lirc-current-context (lirc-get-next-context)))
+         (lirc-render-prompt)))
+
+      ("PART"
+       (let ((channel-name (car (lirc-msg-params msg)))
+             (nick (lirc-msg-src msg)))
+         (lirc-del-context-user channel-name nick)
+         (lirc-display-notice nick " left channel " channel-name)))
+
+      ("QUIT"
+       (let ((nick (lirc-msg-src msg))
+             (reason (mapconcat 'identity (lirc-msg-params msg) " ")))
+         (lirc-del-user nick)
+         (lirc-display-notice nick " quit: " reason)))
+
+      ((and "NICK"
+            (guard (equal lirc-nick (lirc-msg-src msg))))
+       (setq lirc-nick (car (lirc-msg-params msg)))
+       (lirc-display-notice "Set nick to " lirc-nick))
+
+      ("NICK"
+       (let ((old-nick (lirc-msg-src msg))
+             (new-nick (car (lirc-msg-params msg))))
+         (lirc-display-notice nick " is now known as " new-nick)
+         (lirc-rename-user nick new-nick)))
+
+      ("NOTICE"
+       (let ((nick (lirc-msg-src msg))
+             (channel (car (lirc-msg-params msg)))
+             (text (cadr (lirc-msg-params msg))))
+         (pcase text
+           ((rx (: "\01VERSION "
+                   (let version (* (not "\01")))
+                   "\01"))
+            (lirc-display-notice "CTCP version reply from " nick ": " version))
+           (_
+            (lirc-display-notice text)))))
+
+      ("PRIVMSG"
+       (let* ((from (lirc-msg-src msg))
+              (params (lirc-msg-params msg))
+              (to (car params))
+              (text (cadr params)))
+         (pcase text
+           ("\01VERSION\01"
+            (let ((version-string (concat lirc-version " - running on GNU Emacs " emacs-version)))
+              (lirc-send-msg (lirc-msg nil nil "NOTICE"
+                                       (list from (concat "\01VERSION "
+                                                          version-string
+                                                          "\01")))))
+            (lirc-display-notice "CTCP version request received from " from))
+
+           ((rx (let ping (: "\01PING " (* (not "\01")) "\01")))
+            (lirc-send-msg (lirc-msg nil nil "NOTICE" (list from ping)))
+            (lirc-display-notice "CTCP ping received from " from))
+
+           ("\01USERINFO\01"
+            (lirc-display-notice "CTCP userinfo request from " from " (no response sent)"))
+
+           (_
+            (lirc-display-message from to text)))))
+      (_
+       (lirc-display-string (lirc-msg->string msg))))))
+
+
+;;; Command entering
+;;
+
+(defun lirc-enter-string (string)
+  (if (string-prefix-p "/" string)
+      (pcase (substring string 1)
+        ((rx (: "CONNECT " (let network (* not-newline))))
+         (lirc-display-notice "Connecting to " network "...")
+         (lirc-connect network))
+
+        ((rx (: "TOPIC " (let new-topic (* not-newline))))
+         (lirc-send-msg (lirc-msg nil nil "TOPIC" lirc-current-context new-topic)))
+
+        ((rx (: "ME " (let action (* not-newline))))
+         (lirc-send-msg (lirc-msg nil nil "PRIVMSG"
+                                  (list lirc-current-context
+                                        (concat "\01ACTION " action "\01"))))
+         (lirc-display-action lirc-nick action))
+
+        ((rx (: "VERSION" " " (let nick (* (not whitespace)))))
+         (lirc-send-msg (lirc-msg nil nil "PRIVMSG"
+                                  (list nick "\01VERSION\01")))
+         (lirc-display-notice "CTCP version request sent to " nick))
+
+        ((rx "PART" (opt (: " " (let channel (* not-newline)))))
+         (if (or lirc-current-context channel)
+             (lirc-send-msg (lirc-msg nil nil "PART" (if channel
+                                                         channel
+                                                       lirc-current-context)))
+           (lirc-display-error "No current channel to leave.")))
+
+        ((rx "MSG "
+             (let to (* (not whitespace)))
+             " "
+             (let text (* not-newline)))
+         (lirc-send-msg (lirc-msg nil nil "PRIVMSG" target text))
+         (lirc-display-message lirc-nick target text))
+
+        ((rx (: (let cmd-str (+ (not whitespace)))
+                (opt (: " " (let params-str (* not-newline))))))
+         (lirc-send-msg (lirc-msg nil nil (upcase cmd-str)
+                                  (if params-str
+                                      (split-string params-str)
+                                    nil)))))
+
+    (unless (string-empty-p string)
+      (if lirc-current-context
+          (progn
+            (lirc-send-msg (lirc-msg nil nil "PRIVMSG"
+                                     lirc-current-context
+                                     string))
+            (lirc-display-message lirc-nick lirc-current-context string))
+        (lirc-display-error "No current context.")))))
+
+(defun lirc-enter ()
+  "Enter current contents of line after prompt."
+  (interactive)
+  (with-current-buffer "*lirc*"
+    (lirc-enter-string
+     (buffer-substring lirc-input-marker (point-max)))
+    (let ((inhibit-read-only t))
+      (delete-region lirc-input-marker (point-max)))))
+
+
+;;; Mode
+;;
+
+(defvar lirc-mode-map
+  (let ((map (make-sparse-keymap)))
+    (define-key map (kbd "RET") 'lirc-enter)
+    ;; (define-key map (kbd "<C-tab>") 'lirc-cycle-channels)
+    map))
+
+(define-derived-mode lirc-mode text-mode "lirc"
+  "Major mode for LIRC.")
+
+(when (fboundp 'evil-set-initial-state)
+  (evil-set-initial-state 'lirc-mode 'insert))
+
+;;; Main start procedure
+;;
 
 (defun lirc ()
   "Switch to *lirc* buffer."
   (interactive)
-  (pop-to-buffer-same-window "*lirc*")
+  (if (get-buffer "*lirc*")
+      (switch-to-buffer "*lirc*")
+    (switch-to-buffer "*lirc*"))
   (lirc-mode)
-  (lirc-connect))
+  (lirc-setup-buffer)
+  "Started LIRC.")
 
-(define-derived-mode lirc-mode text-mode "lirc"
-  "Major mode for LIRC.")
 
 
 ;;; lirc.el ends here
-:bs-mbpr348.d.ethz.ch