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[gnu-emacs-elpa] / packages / async / smtpmail-async.el

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+;;; smtpmail-async.el --- Send e-mail with smtpmail.el asynchronously
+
+;; Copyright (C) 2012~2014 John Wiegley
+
+;; Author: John Wiegley <jwiegley@gmail.com>
+;; Created: 18 Jun 2012
+
+;; Keywords: email async
+;; X-URL: https://github.com/jwiegley/emacs-async
+
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the GNU General Public License as
+;; published by the Free Software Foundation; either version 2, or (at
+;; your option) any later version.
+
+;; This program is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+\f
+;;; Commentary:
+
+;; Send e-mail with smtpmail.el asynchronously.  To use:
+;;
+;;   (require 'smtpmail-async)
+;;
+;;   (setq send-mail-function 'async-smtpmail-send-it
+;;         message-send-mail-function 'async-smtpmail-send-it)
+;;
+;; This assumes you already have smtpmail.el working.
+
+;;; Code:
+
+(defgroup smtpmail-async nil
+  "Send e-mail with smtpmail.el asynchronously"
+  :group 'smptmail)
+
+(require 'async)
+(require 'smtpmail)
+(require 'message)
+
+(defvar async-smtpmail-before-send-hook nil
+  "Hook running in the child emacs in `async-smtpmail-send-it'.
+It is called just before calling `smtpmail-send-it'.")
+
+(defun async-smtpmail-send-it ()
+  (let ((to          (message-field-value "To"))
+        (buf-content (buffer-substring-no-properties
+                      (point-min) (point-max))))
+    (message "Delivering message to %s..." to)
+    (async-start
+     `(lambda ()
+        (require 'smtpmail)
+        (with-temp-buffer
+          (insert ,buf-content)
+          (set-buffer-multibyte nil)
+          ;; Pass in the variable environment for smtpmail
+          ,(async-inject-variables
+            "\\`\\(smtpmail\\|async-smtpmail\\|\\(user-\\)?mail\\)-\\|auth-sources\\|epg"
+            nil "\\`\\(mail-header-format-function\\|smtpmail-address-buffer\\|mail-mode-abbrev-table\\)")
+          (run-hooks 'async-smtpmail-before-send-hook)
+          (smtpmail-send-it)))
+     `(lambda (&optional ignore)
+        (message "Delivering message to %s...done" ,to)))))
+
+(provide 'smtpmail-async)
+
+;;; smtpmail-async.el ends here