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: 1.4
   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 ;; Link to an IRC session. Only ERC has been implemented at the
  29 ;; moment.
  30 ;;
  31 ;; This file is loaded by default whenever org.el is loaded.  Please
  32 ;; customize the variable `org-default-extensions' to select extensions
  33 ;; you would like to use, and to deselect those which you don't want.
  34 ;;
  35 ;; Please note that at the moment only ERC is supported. Other clients
  36 ;; shouldn't be diffficult to add though.
  37 ;;
  38 ;; Then set `org-irc-link-to-logs' to non-nil if you would like a
  39 ;; file:/ type link to be created to the current line in the logs or
  40 ;; to t if you would like to create an irc:/ style link.
  41 ;;
  42 ;; Links within an org buffer might look like this:
  43 ;;
  44 ;; [[irc:/irc.freenode.net/#emacs/bob][chat with bob in #emacs on freenode]]
  45 ;; [[irc:/irc.freenode.net/#emacs][#emacs on freenode]]
  46 ;; [[irc:/irc.freenode.net/]]
  47 ;;
  48 ;; If, when the resulting link is visited, there is no connection to a
  49 ;; requested server then one will be created.
  50
  51 ;;; Code:
  52
  53 (require 'org)
  54 (require 'erc)
  55 (require 'erc-log)
  56
  57 (defvar org-irc-client 'erc
  58   "The IRC client to act on")
  59 (defvar org-irc-link-to-logs nil
  60   "non-nil will store a link to the logs, nil will store an irc: style link")
  61
  62 (defvar erc-default-port)   ; dynamically scoped from erc.el
  63 (defvar erc-session-port)   ; dynamically scoped form erc-backend.el
  64 (defvar erc-session-server) ; dynamically scoped form erc-backend.el
  65
  66 ;; Generic functions/config (extend these for other clients)
  67
  68 (add-to-list 'org-store-link-functions
  69              'org-irc-store-link)
  70
  71 (org-add-link-type "irc" 'org-irc-visit nil)
  72
  73 (defun org-irc-visit (link)
  74   "Dispatch to the correct visit function based on the client"
  75   (let ((link (org-irc-parse-link link)))
  76     (cond
  77       ((eq org-irc-client 'erc)
  78        (org-irc-visit-erc link))
  79       (t
  80        (error "erc only known client")))))
  81
  82 (defun org-irc-parse-link (link)
  83   "Get a of irc link attributes where `link' looks like
  84 server:port/chan/user (port, chan and user being optional)."
  85   (let* ((parts (split-string link "/" t))
  86          (len (length parts)))
  87     (when (or (< len 1) (> len 3))
  88       (error "Failed to parse link needed 1-3 parts, got %d." len))
  89     (setcar parts (split-string (car parts) ":" t))
  90     parts))
  91
  92 ;;;###autoload
  93 (defun org-irc-store-link ()
  94   "Dispatch to the appropreate function to store a link to
  95 something IRC related"
  96   (cond
  97     ((eq major-mode 'erc-mode)
  98      (org-irc-erc-store-link))))
  99
 100 (defun org-irc-elipsify-description (string &optional after)
 101   "Strip starting and ending whitespace and replace any chars
 102 that appear after the value in `after' with '...'"
 103   (let* ((after (number-to-string (or after 30)))
 104          (replace-map (list (cons "^[ \t]*" "")
 105                             (cons "[ \t]*$" "")
 106                             (cons (concat "^\\(.\\{" after
 107                                           "\\}\\).*") "\\1..."))))
 108     (mapc (lambda (x)
 109             (when (string-match (car x) string)
 110               (setq string (replace-match (cdr x) nil nil string))))
 111           replace-map)
 112     string))
 113
 114 ;; ERC specific functions
 115
 116 (defun org-irc-erc-get-line-from-log (erc-line)
 117   "Find the most suitable line to link to from the erc logs. If
 118 the user is on the erc-prompt then search backward for the first
 119 non-blank line, otherwise return the current line. The result is
 120 a cons of the filename and search string."
 121   (erc-save-buffer-in-logs)
 122   (with-current-buffer (find-file-noselect (erc-current-logfile))
 123     (goto-char (point-max))
 124     (list
 125      (abbreviate-file-name buffer-file-name)
 126      ;; can we get a '::' part?
 127      (if (string= erc-line (erc-prompt))
 128          (progn
 129            (goto-char (point-at-bol))
 130            (when (search-backward-regexp "^[^   ]" nil t)
 131              (buffer-substring-no-properties (point-at-bol)
 132                                              (point-at-eol))))
 133          (when (search-backward erc-line nil t)
 134            (buffer-substring-no-properties (point-at-bol)
 135                                            (point-at-eol)))))))
 136
 137 (defun org-irc-erc-store-link ()
 138   "Depending on the variable `org-irc-link-to-logs' store either
 139 a link to the log file for the current session or an irc: link to
 140 the session itself."
 141   (if org-irc-link-to-logs
 142       (let* ((erc-line (buffer-substring-no-properties
 143                         (point-at-bol) (point-at-eol)))
 144              (parsed-line (org-irc-erc-get-line-from-log erc-line)))
 145         (if (erc-logging-enabled nil)
 146             (progn
 147               (org-store-link-props
 148                :type "file"
 149                :description (concat "'" (org-irc-elipsify-description
 150                                          (cadr parsed-line) 20)
 151                                     "' from an IRC conversation")
 152                :link (concat "file:" (car parsed-line) "::"
 153                              (cadr parsed-line)))
 154               t)
 155             (error "This ERC session is not being logged")))
 156       (let* ((link-text (org-irc-get-erc-link))
 157              (link (org-irc-parse-link link-text)))
 158         (if link-text
 159             (progn
 160               (org-store-link-props
 161                :type "irc"
 162                :link (org-make-link "irc:/" link-text)
 163                :description (concat "irc session '" link-text "'")
 164                :server (car (car link))
 165                :port (or (string-to-number (cadr (pop link))) erc-default-port)
 166                :nick (pop link))
 167               t)
 168             (error "Failed to create ('irc:/' style) ERC link")))))
 169
 170 (defun org-irc-get-erc-link ()
 171   "Return an org compatible irc:/ link from an ERC buffer"
 172   (let* ((session-port (if (numberp erc-session-port)
 173                            (number-to-string erc-session-port)
 174                            erc-session-port))
 175           (link (concat erc-session-server ":" session-port)))
 176     (concat link "/"
 177             (if (and (erc-default-target)
 178                      (erc-channel-p (erc-default-target))
 179                      (car (get-text-property (point) 'erc-data)))
 180                 ;; we can get a nick
 181                 (let ((nick (car (get-text-property (point) 'erc-data))))
 182                   (concat (erc-default-target) "/" nick))
 183                 (erc-default-target)))))
 184
 185 (defun org-irc-get-current-erc-port ()
 186   "Return the current port as a number. If there is not an
 187 explicit port set then return the erc default."
 188   (cond
 189     ((stringp erc-session-port)
 190      (string-to-number erc-session-port))
 191     ((numberp erc-session-port)
 192      erc-session-port)
 193     (t
 194      erc-default-port)))
 195
 196 (defun org-irc-visit-erc (link)
 197   "Visit an ERC buffer based on criteria from the followed link"
 198   (let* ((server (car (car link)))
 199          (port (or (string-to-number (cadr (pop link))) erc-default-port))
 200          (server-buffer)
 201          (buffer-list
 202           (erc-buffer-filter
 203            (lambda nil
 204              (let ((tmp-server-buf (erc-server-buffer)))
 205                (and tmp-server-buf
 206                     (with-current-buffer tmp-server-buf
 207                       (and
 208                        (eq (org-irc-get-current-erc-port) port)
 209                        (string= erc-session-server server)
 210                        (setq server-buffer tmp-server-buf)))))))))
 211     (if buffer-list
 212         (let ((chan-name (pop link)))
 213           ;; if we got a channel name then switch to it or join it
 214           (if chan-name
 215               (let ((chan-buf (catch 'found
 216                                 (dolist (x buffer-list)
 217                                   (if (string= (buffer-name x) chan-name)
 218                                       (throw 'found x))))))
 219                 (if chan-buf
 220                     (progn
 221                       (switch-to-buffer chan-buf)
 222                       ;; if we got a nick, and they're in the chan,
 223                       ;; then start a chat with them
 224                       (let ((nick (pop link)))
 225                         (when nick
 226                           (if (member nick (erc-get-server-nickname-list))
 227                               (progn
 228                                 (goto-char (point-max))
 229                                 (insert (concat nick ": ")))
 230                               (error "%s not found in %s" nick chan-name)))))
 231                     (progn
 232                       (switch-to-buffer server-buffer)
 233                       (erc-cmd-JOIN chan-name))))
 234               (switch-to-buffer server-buffer)))
 235         ;; no server match, make new connection
 236         (erc-select :server server :port port))))
 237
 238 (provide 'org-irc)
 239
 240 ;; arch-tag: 018d7dda-53b8-4a35-ba92-6670939e525a
 241 ;;; org-irc.el ends here