lisp/org-irc.el

   1 ;;; org-irc.el --- Store links to IRC sessions
   2 ;;
   3 ;; Copyright (C) 2008  Free Software Foundation, Inc.
   4 ;;
   5 ;; Author: Philip Jackson <emacs@shellarchive.co.uk>
   6 ;; Keywords: erc, irc, link, org
   7 ;; Version: 6.01a
   8 ;;
   9 ;; This file is part of GNU Emacs.
  10 ;;
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 3, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  24 ;; Boston, MA 02110-1301, USA.
  25
  26 ;;; Commentary:
  27
  28 ;; This file implements links to an IRC session from within Org-mode.
  29 ;; Org-mode loads this module by default - if this is not what you want,
  30 ;; configure the variable `org-modules'.
  31 ;;
  32 ;; Please customize the variable `org-default-extensions' to select
  33 ;; extensions you would like to use, and to deselect those which you don't
  34 ;; want.
  35 ;;
  36 ;; Please note that at the moment only ERC is supported.  Other clients
  37 ;; shouldn't be difficult to add though.
  38 ;;
  39 ;; Then set `org-irc-link-to-logs' to non-nil if you would like a
  40 ;; file:/ type link to be created to the current line in the logs or
  41 ;; to t if you would like to create an irc:/ style link.
  42 ;;
  43 ;; Links within an org buffer might look like this:
  44 ;;
  45 ;; [[irc:/irc.freenode.net/#emacs/bob][chat with bob in #emacs on freenode]]
  46 ;; [[irc:/irc.freenode.net/#emacs][#emacs on freenode]]
  47 ;; [[irc:/irc.freenode.net/]]
  48 ;;
  49 ;; If, when the resulting link is visited, there is no connection to a
  50 ;; requested server then one will be created.
  51
  52 ;;; Code:
  53
  54 (require 'org)
  55
  56 ;; Declare the function fomr ERC that we use.
  57 (declare-function erc-current-logfile "erc-log" (&optional buffer))
  58 (declare-function erc-prompt "erc" ())
  59 (declare-function erc-default-target "erc" ())
  60 (declare-function erc-channel-p "erc" (channel))
  61 (declare-function erc-buffer-filter "erc" (predicate &optional proc))
  62 (declare-function erc-server-buffer "erc" ())
  63 (declare-function erc-get-server-nickname-list "erc" ())
  64 (declare-function erc-cmd-JOIN "erc" (channel &optional key))
  65
  66 (defvar org-irc-client 'erc
  67   "The IRC client to act on.")
  68 (defvar org-irc-link-to-logs nil
  69   "Non-nil will store a link to the logs, nil will store an irc: style link.")
  70
  71 (defvar erc-default-port)   ; dynamically scoped from erc.el
  72 (defvar erc-session-port)   ; dynamically scoped form erc-backend.el
  73 (defvar erc-session-server) ; dynamically scoped form erc-backend.el
  74
  75 ;; Generic functions/config (extend these for other clients)
  76
  77 (add-to-list 'org-store-link-functions 'org-irc-store-link)
  78
  79 (org-add-link-type "irc" 'org-irc-visit nil)
  80
  81 (defun org-irc-visit (link)
  82   "Parse LINK and dispatch to the correct function based on the client found."
  83   (let ((link (org-irc-parse-link link)))
  84     (cond
  85       ((eq org-irc-client 'erc)
  86        (org-irc-visit-erc link))
  87       (t
  88        (error "erc only known client")))))
  89
  90 (defun org-irc-parse-link (link)
  91   "Parse an IRC LINK and return the attributes found.
  92 Parse a LINK that looks like server:port/chan/user (port, chan
  93 and user being optional) and return any or the port, channel or user
  94 attributes that are found."
  95   (let* ((parts (split-string link "/" t))
  96          (len (length parts)))
  97     (when (or (< len 1) (> len 3))
  98       (error "Failed to parse link needed 1-3 parts, got %d" len))
  99     (setcar parts (split-string (car parts) ":" t))
 100     parts))
 101
 102 ;;;###autoload
 103 (defun org-irc-store-link ()
 104   "Dispatch to the appropriate function to store a link to an IRC session."
 105   (cond
 106     ((eq major-mode 'erc-mode)
 107      (org-irc-erc-store-link))))
 108
 109 (defun org-irc-elipsify-description (string &optional after)
 110   "Remove unnecessary white space from STRING and add ellipses if necessary.
 111 Strip starting and ending white space from STRING and replace any
 112 chars that the value AFTER with '...'"
 113   (let* ((after (number-to-string (or after 30)))
 114          (replace-map (list (cons "^[ \t]*" "")
 115                             (cons "[ \t]*$" "")
 116                             (cons (concat "^\\(.\\{" after
 117                                           "\\}\\).*") "\\1..."))))
 118     (mapc (lambda (x)
 119             (when (string-match (car x) string)
 120               (setq string (replace-match (cdr x) nil nil string))))
 121           replace-map)
 122     string))
 123
 124 ;; ERC specific functions
 125
 126 (defun org-irc-erc-get-line-from-log (erc-line)
 127   "Find the best line to link to from the ERC logs given ERC-LINE as a start.
 128 If the user is on the ERC-prompt then search backward for the
 129 first non-blank line, otherwise return the current line.  The
 130 result is a cons of the filename and search string."
 131   (erc-save-buffer-in-logs)
 132   (require 'erc-log)
 133   (with-current-buffer (find-file-noselect (erc-current-logfile))
 134     (goto-char (point-max))
 135     (list
 136      (abbreviate-file-name buffer-file-name)
 137      ;; can we get a '::' part?
 138      (if (string= erc-line (erc-prompt))
 139          (progn
 140            (goto-char (point-at-bol))
 141            (when (search-backward-regexp "^[^   ]" nil t)
 142              (buffer-substring-no-properties (point-at-bol)
 143                                              (point-at-eol))))
 144          (when (search-backward erc-line nil t)
 145            (buffer-substring-no-properties (point-at-bol)
 146                                            (point-at-eol)))))))
 147
 148 (defun org-irc-erc-store-link ()
 149   "Store a link to the IRC log file or the session itself.
 150 Depending on the variable `org-irc-link-to-logs' store either a
 151 link to the log file for the current session or an irc: link to
 152 the session itself."
 153   (require 'erc-log)
 154   (if org-irc-link-to-logs
 155       (let* ((erc-line (buffer-substring-no-properties
 156                         (point-at-bol) (point-at-eol)))
 157              (parsed-line (org-irc-erc-get-line-from-log erc-line)))
 158         (if (erc-logging-enabled nil)
 159             (progn
 160               (org-store-link-props
 161                :type "file"
 162                :description (concat "'" (org-irc-elipsify-description
 163                                          (cadr parsed-line) 20)
 164                                     "' from an IRC conversation")
 165                :link (concat "file:" (car parsed-line) "::"
 166                              (cadr parsed-line)))
 167               t)
 168             (error "This ERC session is not being logged")))
 169       (let* ((link-text (org-irc-get-erc-link))
 170              (link (org-irc-parse-link link-text)))
 171         (if link-text
 172             (progn
 173               (org-store-link-props
 174                :type "irc"
 175                :link (org-make-link "irc:/" link-text)
 176                :description (concat "irc session '" link-text "'")
 177                :server (car (car link))
 178                :port (or (string-to-number (cadr (pop link))) erc-default-port)
 179                :nick (pop link))
 180               t)
 181             (error "Failed to create ('irc:/' style) ERC link")))))
 182
 183 (defun org-irc-get-erc-link ()
 184   "Return an org compatible irc:/ link from an ERC buffer."
 185   (let* ((session-port (if (numberp erc-session-port)
 186                            (number-to-string erc-session-port)
 187                            erc-session-port))
 188           (link (concat erc-session-server ":" session-port)))
 189     (concat link "/"
 190             (if (and (erc-default-target)
 191                      (erc-channel-p (erc-default-target))
 192                      (car (get-text-property (point) 'erc-data)))
 193                 ;; we can get a nick
 194                 (let ((nick (car (get-text-property (point) 'erc-data))))
 195                   (concat (erc-default-target) "/" nick))
 196                 (erc-default-target)))))
 197
 198 (defun org-irc-get-current-erc-port ()
 199   "Return the current port as a number.
 200 Return the current port number or, if none is set, return the ERC
 201 default."
 202   (cond
 203     ((stringp erc-session-port)
 204      (string-to-number erc-session-port))
 205     ((numberp erc-session-port)
 206      erc-session-port)
 207     (t
 208      erc-default-port)))
 209
 210 (defun org-irc-visit-erc (link)
 211   "Visit an ERC buffer based on criteria found in LINK."
 212   (require 'erc)
 213   (require 'erc-log)
 214   (let* ((server (car (car link)))
 215          (port (or (string-to-number (cadr (pop link))) erc-default-port))
 216          (server-buffer)
 217          (buffer-list
 218           (erc-buffer-filter
 219            (lambda nil
 220              (let ((tmp-server-buf (erc-server-buffer)))
 221                (and tmp-server-buf
 222                     (with-current-buffer tmp-server-buf
 223                       (and
 224                        (eq (org-irc-get-current-erc-port) port)
 225                        (string= erc-session-server server)
 226                        (setq server-buffer tmp-server-buf)))))))))
 227     (if buffer-list
 228         (let ((chan-name (pop link)))
 229           ;; if we got a channel name then switch to it or join it
 230           (if chan-name
 231               (let ((chan-buf (catch 'found
 232                                 (dolist (x buffer-list)
 233                                   (if (string= (buffer-name x) chan-name)
 234                                       (throw 'found x))))))
 235                 (if chan-buf
 236                     (progn
 237                       (switch-to-buffer chan-buf)
 238                       ;; if we got a nick, and they're in the chan,
 239                       ;; then start a chat with them
 240                       (let ((nick (pop link)))
 241                         (when nick
 242                           (if (member nick (erc-get-server-nickname-list))
 243                               (progn
 244                                 (goto-char (point-max))
 245                                 (insert (concat nick ": ")))
 246                               (error "%s not found in %s" nick chan-name)))))
 247                     (progn
 248                       (switch-to-buffer server-buffer)
 249                       (erc-cmd-JOIN chan-name))))
 250               (switch-to-buffer server-buffer)))
 251         ;; no server match, make new connection
 252         (erc-select :server server :port port))))
 253
 254 (provide 'org-irc)
 255
 256 ;; arch-tag: 018d7dda-53b8-4a35-ba92-6670939e525a
 257 ;;; org-irc.el ends here