+(defun murk-add-formatting (string)
+ (with-temp-buffer
+ (insert string)
+ (goto-char (point-min))
+ (let ((bold nil)
+ (italics nil)
+ (underline nil)
+ (strikethrough nil)
+ (prev-point (point)))
+ (while (re-search-forward (rx (or (any "\x02\x1D\x1F\x1E\x0F")
+ (: "\x03" (* digit) (opt "," (* digit)))))
+ nil t)
+ (let ((beg (+ (match-beginning 0) 1)))
+ (if bold
+ (add-face-text-property prev-point beg '(:weight bold)))
+ (if italics
+ (add-face-text-property prev-point beg '(:slant italic)))
+ (if underline
+ (add-face-text-property prev-point beg '(:underline t)))
+ (if strikethrough
+ (add-face-text-property prev-point beg '(:strike-through t)))
+ (pcase (match-string 0)
+ ("\x02" (setq bold (not bold)))
+ ("\x1D" (setq italics (not italics)))
+ ("\x1F" (setq underline (not underline)))
+ ("\x1E" (setq strikethrough (not strikethrough)))
+ ("\x0F" ; Reset
+ (setq bold nil)
+ (setq italics nil)
+ (setq underline nil)
+ (setq strikethrough nil))
+ (_))
+ (delete-region (match-beginning 0) (match-end 0))
+ (setq prev-point (point)))))
+ (buffer-string)))
+
+
+;;; Message evaluation
+;;
+
+(defun murk-eval-msg-string (network string)
+ (if murk-debug
+ (murk-display-string nil nil string))
+ (let* ((msg (murk-string->msg string)))
+ (murk-process-autoreplies network msg)
+ (pcase (murk-msg-cmd msg)
+ ("PING"
+ (murk-send-msg network
+ (murk-msg nil nil "PONG" (murk-msg-params msg))))
+
+ ("PONG")
+
+ ("001" ; RPL_WELCOME
+ (let* ((params (murk-msg-params msg))
+ (nick (elt params 0))
+ (text (string-join (seq-drop params 1) " ")))
+ (murk-set-connection-nick network nick)
+ (murk-display-notice (murk-get-context network) text))
+ (let* ((row (assoc network murk-networks))
+ (channels (if (memq :channels row)
+ (cdr (memq :channels row))
+ nil)))
+ (dolist (channel channels)
+ (murk-command-join (list channel)))))
+
+ ("353" ; NAMEREPLY
+ (let* ((params (murk-msg-params msg))
+ (channel (elt params 2))
+ (names (split-string (elt params 3)))
+ (ctx (murk-get-context network channel)))
+ (if ctx
+ (murk-add-context-users ctx names)
+ (murk-display-notice ctx "Users in " channel
+ ": " (string-join names " ")))))
+
+ ("366" ; ENDOFNAMES
+ (let* ((params (murk-msg-params msg))
+ (channel (elt params 1))
+ (ctx (murk-get-context network channel)))
+ (if ctx
+ (murk-display-notice
+ ctx
+ (murk--as-string (length (murk-get-context-users ctx)))
+ " users in " channel)
+ (murk-display-notice (murk-get-context network)
+ "End of " channel " names list."))))
+
+ ("331" ; RPL_NOTOPIC
+ (let* ((params (murk-msg-params msg))
+ (channel (elt params 1))
+ (ctx (murk-get-context network channel)))
+ (murk-display-notice ctx "No topic set.")))
+
+ ("332" ; RPL_TOPIC
+ (let* ((params (murk-msg-params msg))
+ (channel (elt params 1))
+ (topic (elt params 2))
+ (ctx (murk-get-context network channel)))
+ (murk-display-notice ctx "Topic: " topic)))
+
+ ((rx (= 3 (any digit)))
+ (murk-display-notice (murk-get-context network)
+ (mapconcat 'identity (cdr (murk-msg-params msg)) " ")))
+
+ ((and "JOIN"
+ (guard (equal (murk-connection-nick network)
+ (murk-msg-src msg))))
+ (let* ((channel (car (murk-msg-params msg)))
+ (context (list network channel)))
+ (murk-add-context context)
+ (murk-del-all-context-users context)
+ (murk-display-notice (murk-current-context)
+ "Joining channel " channel " on " network)
+ (murk-highlight-current-context)
+ (murk-render-prompt)))
+
+ ("JOIN"
+ (let* ((channel (car (murk-msg-params msg)))
+ (nick (murk-msg-src msg))
+ (ctx (murk-get-context network channel)))
+ (murk-add-context-users ctx (list nick))
+ (if murk-show-joins
+ (murk-display-notice ctx nick " joined channel " channel
+ " on " network))))
+
+ ((and "PART"
+ (guard (equal (murk-connection-nick network)
+ (murk-msg-src msg))))
+ (let* ((channel (car (murk-msg-params msg)))
+ (context (list network channel)))
+ (murk-display-notice context "Left channel " channel)
+ (murk-remove-context context)
+ (murk-del-all-context-users context)
+ (murk-highlight-current-context)
+ (murk-render-prompt)))
+
+ ("PART"
+ (let* ((channel (car (murk-msg-params msg)))
+ (nick (murk-msg-src msg))
+ (ctx (murk-get-context network channel)))
+ (murk-del-context-user ctx nick)
+ (if murk-show-joins
+ (murk-display-notice ctx nick " left channel " channel
+ " on " network))))
+
+ ((and "NICK"
+ (guard (equal (murk-connection-nick network)
+ (murk-msg-src msg))))
+ (let ((new-nick (car (murk-msg-params msg)))
+ (old-nick (murk-connection-nick network)))
+ (murk-set-connection-nick network new-nick)
+ (murk-rename-network-user network old-nick new-nick)
+ (murk-display-notice (murk-get-context network)
+ "Nick set to " new-nick " on " network)))
+
+ ("NICK"
+ (let ((old-nick (murk-msg-src msg))
+ (new-nick (car (murk-msg-params msg))))
+ (murk-display-notice (murk-get-context network)
+ old-nick " is now known as " new-nick
+ " on " network)
+ (murk-rename-network-user network old-nick new-nick)))
+
+ ("TOPIC"
+ (let ((channel (car (murk-msg-params msg)))
+ (nick (murk-msg-src msg))
+ (topic (cadr (murk-msg-params msg))))
+ (murk-display-notice (murk-get-context network channel)
+ nick " set the topic: " topic)))
+
+ ("QUIT"
+ (let ((nick (murk-msg-src msg))
+ (reason (mapconcat 'identity (murk-msg-params msg) " ")))
+ (murk-del-network-user network nick)
+ (if murk-show-joins
+ (murk-display-notice (murk-get-context network)
+ nick " on " network " has quit: " reason))))
+
+ ("NOTICE"
+ (let ((nick (murk-msg-src msg))
+ (channel (car (murk-msg-params msg)))
+ (text (cadr (murk-msg-params msg))))
+ (pcase text
+ ((rx (: "\01VERSION "
+ (let version (* (not "\01")))
+ "\01"))
+ (murk-display-notice (murk-get-context network)
+ "CTCP version reply from " nick ": " version))
+ (_
+ (murk-display-notice (murk-get-context network channel) text)))))
+
+ ("PRIVMSG"
+ (let* ((from (murk-msg-src msg))
+ (params (murk-msg-params msg))
+ (to (car params))
+ (text (cadr params)))
+ (pcase text
+ ("\01VERSION\01"
+ (let ((version-string (concat murk-version " - running on GNU Emacs " emacs-version)))
+ (murk-send-msg network
+ (murk-msg nil nil "NOTICE"
+ (list from (concat "\01VERSION "
+ version-string
+ "\01")))))
+ (murk-display-notice (murk-get-context network)
+ "CTCP version request received from "
+ from " on " network))
+
+ ((rx (let ping (: "\01PING " (* (not "\01")) "\01")))
+ (murk-send-msg network (murk-msg nil nil "NOTICE" (list from ping)))
+ (murk-display-notice (murk-get-context network)
+ "CTCP ping received from " from " on " network))
+
+ ("\01USERINFO\01"
+ (murk-display-notice (murk-get-context network)
+ "CTCP userinfo request from " from
+ " on " network " (no response sent)"))
+
+ ("\01CLIENTINFO\01"
+ (murk-display-notice (murk-get-context network)
+ "CTCP clientinfo request from " from
+ " on " network " (no response sent)"))
+
+ ((rx (: "\01ACTION " (let action-text (* (not "\01"))) "\01"))
+ (murk-display-action network from to action-text))
+
+ (_
+ (murk-display-message network from to text)))))
+
+ (_
+ (murk-display-notice (murk-get-context network)
+ (murk-msg->string msg))))))
+
+
+;;; User-defined responses
+;;
+
+(defun murk--lists-equal (l1 l2)
+ (if (and l1 l2)
+ (if (or (not (and (car l1) (car l2)))
+ (string-match (car l1) (car l2)))
+ (murk--lists-equal (cdr l1) (cdr l2))
+ nil)
+ t))
+
+(defun murk-process-autoreply (network msg autoreply)
+ (let ((matcher (car autoreply))
+ (reply (cadr autoreply)))
+ (let ((target-network (car matcher)))
+ (when (and (or (not target-network)
+ (and (equal network target-network)))
+ (murk--lists-equal (cdr matcher)
+ (append (list (murk-msg-src msg)
+ (murk-msg-cmd msg))
+ (murk-msg-params msg))))
+ (murk-send-msg network
+ (murk-msg nil nil (car reply) (cdr reply)))))))
+
+(defun murk-process-autoreplies (network msg)
+ (mapc
+ (lambda (autoreply)
+ (murk-process-autoreply network msg autoreply))
+ murk-autoreply-table))
+
+
+;;; Commands
+;;
+
+(defvar murk-command-table
+ '(("DEBUG" "Toggle debug mode on/off." murk-command-debug murk-boolean-completions)
+ ("HEADER" "Toggle display of header." murk-command-header murk-boolean-completions)
+ ("SHOWJOINS" "Toggles display of joins/parts." murk-command-showjoins murk-boolean-completions)
+ ("NETWORKS" "List known IRC networks." murk-command-networks)
+ ("CONNECT" "Connect to an IRC network." murk-command-connect murk-network-completions)
+ ("QUIT" "Disconnect from current network." murk-command-quit)
+ ("JOIN" "Join one or more channels." murk-command-join)
+ ("PART" "Leave channel." murk-command-part murk-channel-completions)
+ ("SWITCHCONTEXT" "Switch current context" murk-command-switch-context murk-context-completions)
+ ("NICK" "Change nick." murk-command-nick)
+ ("LIST" "Display details of one or more channels." murk-command-list)
+ ("TOPIC" "Set/query topic for current channel." murk-command-topic)
+ ("USERS" "List nicks of users in current channel." murk-command-users)
+ ("MSG" "Send private message to user." murk-command-msg murk-nick-completions)
+ ("ME" "Display action." murk-command-me)
+ ("VERSION" "Request version of another user's client via CTCP." murk-command-version murk-nick-completions)
+ ("CLEAR" "Clear buffer text." murk-command-clear murk-context-completions)
+ ("HELP" "Display help on client commands." murk-command-help murk-help-completions))
+ "Table of commands explicitly supported by murk.")
+
+(defun murk-boolean-completions ()
+ '("on" "off"))
+
+(defun murk-network-completions ()
+ (mapcar (lambda (row) (car row)) murk-networks))
+
+(defun murk-help-completions ()
+ (mapcar (lambda (row) (car row)) murk-command-table))
+
+(defun murk-channel-completions ()
+ (mapcar (lambda (ctx)
+ (murk-context->string ctx))
+ (seq-filter (lambda (ctx)
+ (not (murk-network-context-p ctx)))
+ murk-contexts)))
+
+(defun murk-context-completions ()
+ (mapcar (lambda (ctx) (murk-context->string ctx)) murk-contexts))
+
+(defun murk-command-help (params)
+ (if params
+ (let* ((cmd-str (upcase (car params)))
+ (row (assoc cmd-str murk-command-table #'equal)))
+ (if row
+ (progn
+ (murk-display-notice nil "Help for \x02" cmd-str "\x02:")
+ (murk-display-notice nil " " (elt row 1)))
+ (murk-display-notice nil "No such (client-interpreted) command.")))
+ (murk-display-notice nil "Client-interpreted commands:")
+ (dolist (row murk-command-table)
+ (murk-display-notice nil " \x02" (elt row 0) "\x02: " (elt row 1)))
+ (murk-display-notice nil "Use /HELP COMMAND to display information about a specific command.")))
+
+(defun murk-command-debug (params)
+ (setq murk-debug
+ (if params
+ (if (equal (upcase (car params)) "ON")
+ t
+ nil)
+ (not murk-debug)))
+ (murk-display-notice nil "Debug mode now " (if murk-debug "on" "off") "."))
+
+(defun murk-command-header (params)
+ (if
+ (if params
+ (equal (upcase (car params)) "ON")
+ (not header-line-format))
+ (progn
+ (murk-setup-header)
+ (murk-display-notice nil "Header enabled."))
+ (setq-local header-line-format nil)
+ (murk-display-notice nil "Header disabled.")))
+
+(defun murk-command-showjoins (params)
+ (setq murk-show-joins
+ (if params
+ (if (equal (upcase (car params)) "ON")
+ t
+ nil)
+ (not murk-show-joins)))
+ (murk-display-notice nil "Joins/parts will now be "
+ (if murk-show-joins "shown" "hidden") "."))
+
+(defun murk-command-connect (params)
+ (if params
+ (let ((network (car params)))
+ (murk-display-notice nil "Attempting to connect to " network "...")
+ (murk-connect network))
+ (murk-display-notice nil "Usage: /connect <network>")))
+
+(defun murk-command-networks (_params)
+ (murk-display-notice nil "Currently-known networks:")
+ (dolist (row murk-networks)
+ (seq-let (network network port &rest _others) row
+ (murk-display-notice nil "\t" network
+ " [" network
+ " " (number-to-string port) "]")))
+ (murk-display-notice nil "(Modify the `murk-networks' variable to add more.)"))
+
+(defun murk-command-quit (params)
+ (let ((ctx (murk-current-context)))
+ (if (not ctx)
+ (murk-display-error "No current network")
+ (let ((quit-msg (if params (string-join params " ") murk-default-quit-msg)))
+ (murk-send-msg
+ (murk-context-network ctx)
+ (murk-msg nil nil "QUIT" quit-msg))))))
+
+(defun murk-command-join (params)
+ (if params
+ (let ((network (murk-context-network (murk-current-context))))
+ (dolist (channel params)
+ (murk-send-msg network (murk-msg nil nil "JOIN" channel))))
+ (murk-display-notice nil "Usage: /join channel [channel2 ...]")))
+
+(defun murk-command-part (params)
+ (let ((ctx (cond
+ ((not params) (murk-current-context))
+ ((seq-contains (car params) "@") (murk-string->context (car params)))
+ (t (list (murk-context-network (murk-current-context)) (car params))))))
+ (let ((network (murk-context-network ctx))
+ (channel (murk-context-channel ctx)))
+ (if channel
+ (murk-send-msg network (murk-msg nil nil "PART" channel))
+ (murk-display-error "Specify which channel to leave")))))
+
+(defun murk-command-switch-context (params)
+ (if (not params)
+ (murk-display-notice nil "Usage: /switchcontext #channel@network")
+ (let ((ctx (murk-string->context (car params))))
+ (murk-switch-to-context ctx)
+ (murk-highlight-current-context)
+ (murk-render-prompt)
+ (if murk-zoomed
+ (murk-zoom-in (murk-current-context))))))
+
+(defun murk-command-nick (params)
+ (if params
+ (let ((new-nick (string-join params " "))
+ (ctx (murk-current-context)))
+ (if ctx
+ (murk-send-msg (murk-context-network ctx)
+ (murk-msg nil nil "NICK" new-nick))
+ (murk-display-error "No current connection")))
+ (murk-display-notice nil "Usage: /nick <new-nick>")))
+
+(defun murk-command-list (params)
+ (let ((ctx (murk-current-context)))
+ (if ctx
+ (if (not params)
+ (murk-display-notice nil "This command can generate lots of output."
+ " Use `/LIST -yes' if you really want this,"
+ " or `/LIST <channel_regexp>' to reduce the output.")
+ (let ((network (murk-context-network ctx)))
+ (if (equal (upcase (car params)) "-YES")
+ (murk-send-msg network (murk-msg nil nil "LIST"))
+ (murk-send-msg network (murk-msg nil nil "LIST"
+ (car params))))))
+ (murk-display-error "No current connection"))))
+
+(defun murk-command-topic (params)
+ (let ((ctx (murk-current-context)))
+ (if (and ctx (not (murk-network-context-p ctx)))
+ (let ((network (murk-context-network ctx))
+ (channel (murk-context-channel ctx)))
+ (if params
+ (murk-send-msg network
+ (murk-msg nil nil "TOPIC" channel
+ (string-join params " ")))
+ (murk-send-msg network
+ (murk-msg nil nil "TOPIC" channel))))
+ (murk-display-notice nil "No current channel."))))
+
+(defun murk-command-msg (params)
+ (let ((network (murk-context-network (murk-current-context))))
+ (if (and params (>= (length params) 2))
+ (let ((to (car params))
+ (text (string-join (cdr params) " ")))
+ (murk-send-msg network (murk-msg nil nil "PRIVMSG" to text))
+ (murk-display-message network
+ (murk-connection-nick network)
+ to text))
+ (murk-display-notice nil "Usage: /msg <nick> <message>"))))
+
+(defun murk-command-me (params)
+ (let* ((ctx (murk-current-context))
+ (network (murk-context-network ctx)))
+ (if (and ctx (not (murk-network-context-p ctx)))
+ (if params
+ (let* ((channel (murk-context-channel ctx))
+ (my-nick (murk-connection-nick network))
+ (action (string-join params " "))
+ (ctcp-text (concat "\01ACTION " action "\01")))
+ (murk-send-msg network
+ (murk-msg nil nil "PRIVMSG"
+ (list channel ctcp-text)))
+ (murk-display-action network my-nick channel action))
+ (murk-display-notice nil "Usage: /me <action>"))
+ (murk-display-notice nil "No current channel."))))
+
+(defun murk-command-version (params)
+ (let ((ctx (murk-current-context)))
+ (if ctx
+ (if params
+ (let ((network (murk-context-network ctx))
+ (nick (car params)))
+ (murk-send-msg network
+ (murk-msg nil nil "PRIVMSG"
+ (list nick "\01VERSION\01")))
+ (murk-display-notice ctx "CTCP version request sent to "
+ nick " on " network))
+ (murk-display-notice ctx "Usage: /version <nick>"))
+ (murk-display-notice nil "No current channel."))))
+
+(defun murk-command-users (_params)
+ (let ((ctx (murk-current-context)))
+ (if (and ctx (not (murk-network-context-p ctx)))
+ (let ((channel (murk-context-channel ctx))
+ (network (murk-context-network ctx))
+ (users (murk-get-context-users ctx)))
+ (murk-display-notice ctx "Users in " channel " on " network ":")
+ (murk-display-notice ctx (string-join users " ")))
+ (murk-display-notice nil "No current channel."))))
+
+
+;;; Command entering
+;;
+
+(defun murk-enter-string (string)
+ (if (string-prefix-p "/" string)
+ (pcase string
+ ((rx (: "/" (let cmd-str (+ (not whitespace)))
+ (opt (+ whitespace)
+ (let params-str (+ anychar))
+ string-end)))
+ (let ((command-row (assoc (upcase cmd-str) murk-command-table #'equal))
+ (params (if params-str
+ (split-string params-str nil t)
+ nil)))
+ (if (and command-row (elt command-row 2))
+ (funcall (elt command-row 2) params)
+ (murk-send-msg
+ (murk-context-network (murk-current-context))
+ (murk-msg nil nil (upcase cmd-str) params)))))
+ (_
+ (murk-display-error "Badly formed command")))
+ (unless (string-empty-p string)
+ (let ((ctx (murk-current-context)))
+ (if ctx
+ (if (not (murk-network-context-p ctx))
+ (let ((network (murk-context-network ctx))
+ (channel (murk-context-channel ctx)))
+ (murk-send-msg network
+ (murk-msg nil nil "PRIVMSG" channel string))
+ (murk-display-message network
+ (murk-connection-nick network)
+ channel string))
+ (murk-display-error "No current channel"))
+ (murk-display-error "No current context"))))))
+
+
+;;; Command history
+;;
+
+(defvar murk-history nil
+ "Commands and messages sent in current session.")
+
+(defvar murk-history-index nil)
+
+(defun murk-history-cycle (delta)
+ (when murk-history
+ (with-current-buffer "*murk*"
+ (if murk-history-index
+ (setq murk-history-index
+ (max 0
+ (min (- (length murk-history) 1)
+ (+ delta murk-history-index))))
+ (setq murk-history-index 0))
+ (delete-region murk-input-marker (point-max))
+ (insert (elt murk-history murk-history-index)))))
+
+
+;;; Interactive commands
+;;
+
+(defun murk-enter ()
+ "Enter current contents of line after prompt."
+ (interactive)
+ (with-current-buffer "*murk*"
+ (let ((line (buffer-substring murk-input-marker (point-max))))
+ (push line murk-history)
+ (setq murk-history-index nil)
+ (let ((inhibit-read-only t))
+ (delete-region murk-input-marker (point-max)))
+ (murk-enter-string line))))
+
+(defun murk-history-next ()
+ (interactive)
+ (murk-history-cycle -1))
+
+(defun murk-history-prev ()
+ (interactive)
+ (murk-history-cycle +1))
+
+(defun murk-cycle-contexts-forward ()
+ (interactive)
+ (murk-cycle-contexts)
+ (murk-highlight-current-context)
+ (murk-render-prompt)
+ (if murk-zoomed
+ (murk-zoom-in (murk-current-context))))
+
+(defun murk-cycle-contexts-reverse ()
+ (interactive)
+ (murk-cycle-contexts t)
+ (murk-highlight-current-context)
+ (murk-render-prompt)
+ (if murk-zoomed
+ (murk-zoom-in (murk-current-context))))
+
+(defvar murk-zoomed nil
+ "Keeps track of zoom status.")
+
+(defun murk-toggle-zoom ()
+ (interactive)
+ (if murk-zoomed
+ (murk-zoom-out)
+ (murk-zoom-in (murk-current-context)))
+ (setq murk-zoomed (not murk-zoomed)))
+
+
+(defun murk-complete-input ()
+ (interactive)
+ (let ((completion-ignore-case t))
+ (when (>= (point) murk-input-marker)
+ (pcase (buffer-substring murk-input-marker (point))
+ ((rx (: "/" (let cmd-str (+ (not whitespace))) (+ " ") (* (not whitespace)) string-end))
+ (let ((space-idx (save-excursion
+ (re-search-backward " " murk-input-marker t)))
+ (table-row (assoc (upcase cmd-str) murk-command-table #'equal)))
+ (if (and table-row (elt table-row 3))
+ (let* ((completions-nospace (funcall (elt table-row 3)))
+ (completions (mapcar (lambda (el) (concat el " ")) completions-nospace)))
+ (completion-in-region (+ 1 space-idx) (point) completions)))))
+ ((rx (: "/" (* (not whitespace)) string-end))
+ (message (buffer-substring murk-input-marker (point)))
+ (completion-in-region murk-input-marker (point)
+ (mapcar (lambda (row) (concat "/" (car row) " "))
+ murk-command-table)))
+ (_
+ (let* ((end (max murk-input-marker (point)))
+ (space-idx (save-excursion
+ (re-search-backward " " murk-input-marker t)))
+ (start (if space-idx (+ 1 space-idx) murk-input-marker)))
+ (unless (string-prefix-p "/" (buffer-substring start end))
+ (let* ((users (murk-get-context-users (murk-current-context)))
+ (users-no@ (mapcar
+ (lambda (u) (car (split-string u "@" t)))
+ users)))
+ (completion-in-region start end users-no@)))))))))