lisp/gnus/gnus-notifications.el

   1 ;; gnus-notifications.el -- Send notification on new message in Gnus
   2
   3 ;; Copyright (C) 2012-2017 Free Software Foundation, Inc.
   4
   5 ;; Author: Julien Danjou <julien@danjou.info>
   6 ;; Keywords: news
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;; This implements notifications using `notifications-notify' on new
  26 ;; messages received.
  27 ;; Use (add-hook 'gnus-after-getting-new-news-hook 'gnus-notifications)
  28 ;; to get notifications just after getting the new news.
  29
  30 ;;; Code:
  31
  32 (ignore-errors
  33   (require 'notifications))
  34 (require 'gnus-sum)
  35 (require 'gnus-group)
  36 (require 'gnus-int)
  37 (require 'gnus-art)
  38 (require 'gnus-util)
  39 (ignore-errors
  40   (require 'google-contacts))        ; Optional
  41 (require 'gnus-fun)
  42
  43 (defgroup gnus-notifications nil
  44   "Send notifications on new message in Gnus."
  45   :version "24.3"
  46   :group 'gnus)
  47
  48 (defcustom gnus-notifications-use-google-contacts t
  49   "Use Google Contacts to retrieve photo."
  50   :type 'boolean
  51   :group 'gnus-notifications)
  52
  53 (defcustom gnus-notifications-use-gravatar t
  54   "Use Gravatar to retrieve photo."
  55   :type 'boolean
  56   :group 'gnus-notifications)
  57
  58 (defcustom gnus-notifications-minimum-level 1
  59   "Minimum group level the message should have to be notified.
  60 Any message in a group that has a greater value than this will
  61 not get notifications."
  62   :type 'integer
  63   :group 'gnus-notifications)
  64
  65 (defcustom gnus-notifications-timeout nil
  66   "Timeout used for notifications sent via `notifications-notify'."
  67   :type '(choice (const :tag "Server default" nil)
  68                  (integer :tag "Milliseconds"))
  69   :group 'gnus-notifications)
  70
  71 (defvar gnus-notifications-sent nil
  72   "Notifications already sent.")
  73
  74 (defvar gnus-notifications-id-to-msg nil
  75   "Map notifications ids to messages.")
  76
  77 (defun gnus-notifications-action (id key)
  78   (let ((group-article (assoc id gnus-notifications-id-to-msg)))
  79     (when group-article
  80       (let ((group (cadr group-article))
  81             (article (nth 2 group-article)))
  82         (cond ((string= key "read")
  83                (gnus-fetch-group group (list article))
  84                (select-frame-set-input-focus (selected-frame)))
  85               ((string= key "mark-read")
  86                (gnus-update-read-articles
  87                 group
  88                 (delq article (gnus-list-of-unread-articles group)))
  89                ;; gnus-group-refresh-group
  90                (gnus-group-update-group group)))))))
  91
  92 (defun gnus-notifications-notify (from subject photo-file)
  93   "Send a notification about a new mail.
  94 Return a notification id if any, or t on success."
  95   (if (fboundp 'notifications-notify)
  96       (gnus-funcall-no-warning
  97        'notifications-notify
  98        :title from
  99        :body subject
 100        :actions '("read" "Read" "mark-read" "Mark As Read")
 101        :on-action 'gnus-notifications-action
 102        :app-icon (gnus-funcall-no-warning
 103                   'image-search-load-path "gnus/gnus.png")
 104        :image-path photo-file
 105        :app-name "Gnus"
 106        :category "email.arrived"
 107        :timeout gnus-notifications-timeout)
 108     (message "New message from %s: %s" from subject)
 109     ;; Don't return an id
 110     t))
 111
 112 (declare-function gravatar-retrieve-synchronously "gravatar.el"
 113                   (mail-address))
 114
 115 (defun gnus-notifications-get-photo (mail-address)
 116   "Get photo for mail address."
 117   (let ((google-photo (when (and gnus-notifications-use-google-contacts
 118                                  (fboundp 'google-contacts-get-photo))
 119                         (ignore-errors
 120                           (gnus-funcall-no-warning
 121                            'google-contacts-get-photo mail-address)))))
 122     (if google-photo
 123         google-photo
 124       (when gnus-notifications-use-gravatar
 125         (let ((gravatar (ignore-errors
 126                           (gravatar-retrieve-synchronously mail-address))))
 127           (if (eq gravatar 'error)
 128               nil
 129             (plist-get (cdr gravatar) :data)))))))
 130
 131 (defun gnus-notifications-get-photo-file (mail-address)
 132   "Get a temporary file with an image for MAIL-ADDRESS.
 133 You have to delete the temporary image yourself using
 134 `delete-image'.
 135
 136 Returns nil if no image found."
 137   (let ((photo (gnus-notifications-get-photo mail-address)))
 138     (when photo
 139       (let ((photo-file (make-temp-file "gnus-notifications-photo-"))
 140             (coding-system-for-write 'binary))
 141         (with-temp-file photo-file
 142           (insert photo))
 143         photo-file))))
 144
 145 ;;;###autoload
 146 (defun gnus-notifications ()
 147   "Send a notification on new message.
 148 This check for new messages that are in group with a level lower
 149 or equal to `gnus-notifications-minimum-level' and send a
 150 notification using `notifications-notify' for it.
 151
 152 This is typically a function to add in
 153 `gnus-after-getting-new-news-hook'"
 154   (dolist (entry gnus-newsrc-alist)
 155     (let ((group (car entry)))
 156       ;; Check that the group level is less than
 157       ;; `gnus-notifications-minimum-level' and the the group has unread
 158       ;; messages.
 159       (when (and (<= (gnus-group-level group) gnus-notifications-minimum-level)
 160                  (let ((unread (gnus-group-unread group)))
 161                    (and (numberp unread)
 162                         (> unread 0))))
 163         ;; Each group should have an entry in the `gnus-notifications-sent'
 164         ;; alist. If not, we add one at this time.
 165         (let ((group-notifications (or (assoc group gnus-notifications-sent)
 166                                        ;; Nothing, add one and return it.
 167                                        (assoc group
 168                                               (add-to-list
 169                                                'gnus-notifications-sent
 170                                                (cons group nil))))))
 171           (dolist (article (gnus-list-of-unread-articles group))
 172             ;; Check if the article already has been notified
 173             (unless (memq article (cdr group-notifications))
 174               (with-current-buffer nntp-server-buffer
 175                 (gnus-request-head article group)
 176                 (article-decode-encoded-words) ; to decode mail addresses, subjects, etc
 177                 (let* ((address-components (mail-extract-address-components
 178                                             (or (mail-fetch-field "From") "")))
 179                        (address (cadr address-components)))
 180                   ;; Ignore mails from ourselves
 181                   (unless (and gnus-ignored-from-addresses
 182                                address
 183                                (cond ((functionp gnus-ignored-from-addresses)
 184                                       (funcall gnus-ignored-from-addresses address))
 185                                      (t (string-match-p
 186                                          (gnus-ignored-from-addresses)
 187                                          address))))
 188                     (let* ((photo-file (gnus-notifications-get-photo-file address))
 189                            (notification-id (gnus-notifications-notify
 190                                              (or (car address-components) address)
 191                                              (mail-fetch-field "Subject")
 192                                              photo-file)))
 193                       (when notification-id
 194                         ;; Register that we did notify this message
 195                         (setcdr group-notifications (cons article (cdr group-notifications)))
 196                         (unless (eq notification-id t)
 197                           ;; Register the notification id for later actions
 198                           (add-to-list 'gnus-notifications-id-to-msg (list notification-id group article))))
 199                       (when photo-file
 200                         (delete-file photo-file)))))))))))))
 201
 202 (provide 'gnus-notifications)
 203
 204 ;;; gnus-notifications.el ends here