mirror of https://github.com/djcb/mu.git
476 lines
16 KiB
EmacsLisp
476 lines
16 KiB
EmacsLisp
;; mm-send.el -- part of mm, the mu mail user agent
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;;
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;; Copyright (C) 2011 Dirk-Jan C. Binnema
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;; Author: Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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;; Maintainer: Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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;; Keywords: email
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;; Version: 0.0
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;; This file is not part of GNU Emacs.
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;;
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; In this file, various functions to compose/send messages, piggybacking on
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;; gnus
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;; mm
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;;; Code:
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(eval-when-compile (require 'cl))
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;; we use some stuff from gnus...
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(require 'message)
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(require 'mail-parse)
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;; internal variables / constants ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defconst mm/msg-draft-name "*mm-draft*"
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"Name for draft messages.")
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; FIXME
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(defun mm/mu-binary-version () "0.98pre")
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(defun mm/msg-user-agent ()
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"Return the User-Agent string for mm. This is either the value
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of `mm/user-agent', or, if not set, a string based on the
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version of mm and emacs."
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(or mm/user-agent
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(format "mu %s; emacs %s" (mm/mu-binary-version) emacs-version)))
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(defun mm/view-body (msg)
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"Get the body for this message, which is either :body-txt,
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or if not available, :body-html converted to text)."
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(or (plist-get msg :body-txt)
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(with-temp-buffer
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(plist-get msg :body-html)
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(html2text)
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(buffer-string))
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"No body found"))
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(defun mm/msg-cite-original (msg)
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"Cite the body text of MSG, with a \"On %s, %s wrote:\"
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line (with the %s's replaced with the date of MSG and the name
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or e-mail address of its sender (or 'someone' if nothing
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else)), followed of the quoted body of MSG, constructed by by
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prepending `mm/msg-citation-prefix' to each line. If there is
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no body in MSG, return nil."
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(let* ((from (plist-get msg :from))
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;; first try plain-text, then html
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(body (or (plist-get msg :body-txt)
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(with-temp-buffer
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(plist-get msg :body-html)
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(html2text)
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(buffer-string)))))
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(when body
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(concat
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(format "On %s, %s wrote:"
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(format-time-string "%c" (plist-get msg :date))
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(if (and from (car from)) ;; a list ((<name> . <email>))
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(or (caar from) (cdar from) "someone")
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"someone"))
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"\n\n"
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(replace-regexp-in-string "^" " > " body)))))
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(defun mm/msg-recipients-remove (lst email-to-remove)
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"Remove the recipient with EMAIL from the recipient list (of form
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'( (\"A\" . \"a@example.com\") (\"B\" . \"B@example.com\"))."
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(remove-if
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(lambda (name-email)
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(let ((email (cdr name-email)))
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(when email (string= email-to-remove (downcase email))))) lst))
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(defun mm/msg-recipients-to-string (lst)
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"Convert a recipient list (of form '( (\"A\"
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. \"a@example.com\") (\"B\" . \"B@example.com\") (nil
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. \"c@example.com\")) into a string of form \"A <@aexample.com>, B
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<b@example.com>, c@example.com\."
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(mapconcat
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(lambda (recip)
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(let ((name (car recip)) (email (cdr recip)))
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(if name
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(format "%s <%s>" name email)
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(format "%s" email)))) lst ", "))
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(defun mm/msg-hidden-header (hdr val)
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"Return user-invisible header to the message (HDR: VAL\n)."
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;; (format "%s: %s\n" hdr val))
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(propertize (format "%s: %s\n" hdr val) 'invisible t))
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(defun mm/msg-header (hdr val)
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"Return a header line of the form HDR: VAL\n. If VAL is nil,
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return nil."
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(when val (format "%s: %s\n" hdr val)))
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(defun mm/msg-references-create (msg)
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"Construct the value of the References: header based on MSG as a
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comma-separated string. Normally, this the concatenation of the
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existing References (which may be empty) and the message-id. If the
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message-id is empty, returns the old References. If both are empty,
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return nil."
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(let ((refs (plist-get msg :references))
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(msgid (plist-get msg :message-id)))
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(if msgid ;; every received message should have one...
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(mapconcat 'identity (append refs (list msgid)) ",")
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(mapconcat 'identity refs ","))))
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(defun mm/msg-to-create (msg reply-all)
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"Construct the To: header for a reply-message based on some
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message MSG. If REPLY-ALL is nil, this the the Reply-To addresss of
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MSG if it exist, or the From:-address othewise. If reply-all is
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non-nil, the To: is what was in the old To: with either the
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Reply-To: or From: appended, and then the
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receiver (i.e. `user-mail-address') removed.
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So:
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reply-all nil: Reply-To: or From: of MSG
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reply-all t : Reply-To: or From: of MSG + To: of MSG - `user-mail-address'
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The result is either nil or a string which can be used for the To:-field."
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(let ((to-lst (plist-get msg :to))
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(reply-to (plist-get msg :reply-to))
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(from (plist-get msg :from)))
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(if reply-all
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(progn ;; reply-all
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(setq to-lst ;; append Reply-To:, or if not set, From: if set
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(if reply-to (cons `(nil . ,reply-to) to-lst)
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(if from (append to-lst from)
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to-lst)))
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;; and remove myself from To:
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(setq to-lst (mm/msg-recipients-remove to-lst user-mail-address))
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(mm/msg-recipients-to-string to-lst))
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;; reply single
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(progn
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(or reply-to (mm/msg-recipients-to-string from))))))
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(defun mm/msg-cc-create (msg reply-all)
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"Get the list of Cc-addresses for the reply to MSG. If REPLY-ALL
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is nil this is simply empty, otherwise it is the same list as the
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one in MSG, minus `user-mail-address'. The result of this function
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is either nil or a string to be used for the Cc: field."
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(let ((cc-lst (plist-get msg :cc)))
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(when (and reply-all cc-lst)
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(mm/msg-recipients-to-string
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(mm/msg-recipients-remove cc-lst
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user-mail-address)))))
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(defun mm/msg-from-create ()
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"Construct a value for the From:-field of the reply to MSG,
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based on `user-full-name' and `user-mail-address'; if the latter is
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nil, function returns nil."
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(when user-mail-address
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(if user-full-name
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(format "%s <%s>" user-full-name user-mail-address)
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(format "%s" user-mail-address))))
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(defconst mm/reply-docid-header "Reply-docid"
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"*internal* The reply-to-docid header.")
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(defun mm/msg-create-reply (msg reply-all)
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"Create a draft message as a reply to MSG; if REPLY-ALL is
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non-nil, reply to all recipients.
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A reply message has fields:
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From: - see `mu-msg-from-create'
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To: - see `mm/msg-to-create'
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Cc: - see `mm/msg-cc-create'
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Subject: - `mm/msg-reply-prefix' + subject of MSG
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then, the following fields, normally hidden from user:
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Reply-To: - if `mail-reply-to' has been set
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References: - see `mm/msg-references-create'
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In-Reply-To: - message-id of MSG
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User-Agent - see `mm/msg-user-agent'
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Then follows `mail-header-separator' (for `message-mode' to separate
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body from headers)
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And finally, the cited body of MSG, as per `mm/msg-cite-original'."
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(concat
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(mm/msg-header "From" (or (mm/msg-from-create) ""))
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(when (boundp 'mail-reply-to)
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(mm/msg-header "Reply-To" mail-reply-to))
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(mm/msg-header "To" (or (mm/msg-to-create msg reply-all) ""))
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(mm/msg-header "Cc" (mm/msg-cc-create msg reply-all))
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(mm/msg-hidden-header "User-agent" (mm/msg-user-agent))
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(mm/msg-hidden-header mm/reply-docid-header (plist-get msg :docid))
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(mm/msg-hidden-header "References" (mm/msg-references-create msg))
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(mm/msg-hidden-header "In-reply-to" (plist-get msg :message-id))
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(mm/msg-header "Subject"
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(concat mm/msg-reply-prefix (plist-get msg :subject)))
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(propertize mail-header-separator 'read-only t 'intangible t) '"\n"
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(mm/msg-cite-original msg)))
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(defconst mm/forward-docid-header "Forward-docid"
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"*internal* The reply-to-docid header.")
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;; TODO: attachments
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(defun mm/msg-create-forward (msg)
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"Create a draft forward message for MSG.
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A forward message has fields:
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From: - see `mm/msg-from-create'
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To: - empty
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Subject: - `mm/msg-forward-prefix' + subject of MSG
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then, the following fields, normally hidden from user:
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Reply-To: - if `mail-reply-to' has been set
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References: - see `mm/msg-references-create'
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User-Agent - see `mm/msg-user-agent'
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Then follows `mail-header-separator' (for `message-mode' to separate
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body from headers)
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And finally, the cited body of MSG, as per `mm/msg-cite-original'."
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(concat
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(mm/msg-header "From" (or (mm/msg-from-create) ""))
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(when (boundp 'mail-reply-to)
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(mm/msg-header "Reply-To" mail-reply-to))
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(mm/msg-header "To" "")
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(mm/msg-hidden-header "User-agent" (mm/msg-user-agent))
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(mm/msg-hidden-header "References" (mm/msg-references-create msg))
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(mm/msg-hidden-header mm/forward-docid-header (plist-get msg :docid))
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(mm/msg-header"Subject"
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(concat mm/msg-forward-prefix (plist-get msg :subject)))
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(propertize mail-header-separator 'read-only t 'intangible t) "\n"
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(mm/msg-cite-original msg)))
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(defun mm/msg-create-new ()
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"Create a new message.
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A new draft message has fields:
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From: - see `mu-msg-from-create'
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To: - empty
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Subject: - empty
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then, the following fields, normally hidden from user:
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Reply-To: - if `mail-reply-to' has been set
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User-Agent - see `mm/msg-user-agent'
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Then follows `mail-header-separator' (for `message-mode' to separate
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body from headers)."
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(concat
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(mm/msg-header "From" (or (mm/msg-from-create) ""))
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(when (boundp 'mail-reply-to)
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(mm/msg-header "Reply-To" mail-reply-to))
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(mm/msg-header "To" "")
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(mm/msg-hidden-header "User-agent" (mm/msg-user-agent))
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(mm/msg-header "Subject" "")
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(propertize mail-header-separator 'read-only t 'intangible t) "\n"))
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(defconst mm/msg-prefix "mm" "prefix for mm-generated
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mail files; we use this to ensure that our hooks don't mess
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with non-mm-generated messages")
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(defun mm/msg-draft-file-name ()
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"Create a Maildir-compatible[1], unique file name for a draft
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message.
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[1]: see http://cr.yp.to/proto/maildir.html"
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(format "%s-%x%x:2,D" ;; 'D': rarely used, but hey, it's available
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(format-time-string "%Y%m%d" (current-time))
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(emacs-pid)
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(random t)))
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;;; (replace-regexp-in-string "[:/]" "_" (system-name))))
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(defun mm/msg-compose (str &optional parent-docid reply-or-forward)
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"Create a new draft message in the drafts folder with STR as
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its contents, and open this message file for editing.
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For replies/forewards, you can specify PARENT-DOCID so the
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corresponding message can get its Passed or Replied flag set when
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this one is sent. If PARENT-DOCID is specified, also
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reply-or-forward should be specified, which is a symbol, either
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'reply or 'forward.
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The name of the draft folder is constructed from the concatenation of
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`mm/maildir' and `mm/drafts-folder' (therefore, these must be set).
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The message file name is a unique name determined by
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`mm/msg-draft-file-name'.
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The initial STR would be created from either `mm/msg-create-reply',
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`mm/msg-create-forward' or `mm/msg-create-new'. The editing buffer is
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using Gnus' `message-mode'."
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(unless mm/maildir (error "mm/maildir not set"))
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(unless mm/drafts-folder (error "mm/drafts-folder not set"))
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;; write our draft message to the the drafts folder
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(let ((draftfile (concat mm/maildir mm/drafts-folder "/cur/"
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(mm/msg-draft-file-name))))
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(with-temp-file draftfile (insert str))
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(find-file draftfile)
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(rename-buffer mm/msg-draft-name t)
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;; save our file immediately, add add it to the db; thus, we can retrieve
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;; the new docid from `mm/path-docid-map'.
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(write-file draftfile)
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(mm/proc-add draftfile mm/drafts-folder)
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(message-mode)
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(make-local-variable 'write-file-functions)
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;; update the db when the file is saved...]
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(add-to-list 'write-file-functions
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(lambda() (mm/proc-add (buffer-file-name) mm/drafts-folder)))
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;; hook our functions up with sending of the message
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(add-hook 'message-sent-hook 'mm/msg-save-to-sent nil t)
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(add-hook 'message-sent-hook 'mm/send-set-parent-flag nil t)
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(let ((message-hidden-headers
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`("^References:" "^Face:" "^X-Face:" "^X-Draft-From:"
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,(concat mm/reply-docid-header ":")
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,(concat mm/forward-docid-header ":")
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"^User-agent:")))
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(message-hide-headers))
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(message-goto-body)))
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(defun mm/send-compose-handler (msg compose-type)
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"This function is registered as the compose handler in
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`mm/proc-compose-func', and will be called when a new message is to
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be composed, based on some existing one. MSG is a message sexp,
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while COMPOSE-TYPE is a symbol, either 'reply or 'forward.
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In case of 'forward, create a draft forward for MSG, and switch to
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an edit buffer with the draft message.
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In case of 'reply, create a draft reply to MSG, and swith to an
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edit buffer with the draft message"
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(cond
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((eq compose-type 'forward) ;; forward
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(when (mm/msg-compose (mm/msg-create-forward msg)
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(plist-get msg :docid) 'forward)
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(message-goto-to)))
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((eq compose-type 'reply) ;; reply
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(let* ((recipnum (+ (length (plist-get msg :to))
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(length (plist-get msg :cc))))
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(replyall (when (> recipnum 1)
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(yes-or-no-p
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(format "Reply to all ~%d recipients? "
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(+ recipnum))))))
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;; exact num depends on some more things
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(when (mm/msg-compose (mm/msg-create-reply msg replyall)
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(plist-get msg :docid) 'reply)
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(message-goto-body))))
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((eq compose-type 'draft)
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(unless (member 'draft (plist-get msg :flags))
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(error "Cannot edit a non-draft message"))
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(mm/edit-draft (plist-get msg :docid) (plist-get msg :path)))
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(t (error "unexpected type %S in compose handler" compose-type))))
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(defun mm/msg-save-to-sent ()
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"Move the message in this buffer to the sent folder. This is
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meant to be called from message mode's `message-sent-hook'."
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(unless mm/sent-folder (error "mm/sent-folder not set"))
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(when mm/mm-msg ;; only if we are mm
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(let ((docid (gethash (buffer-file-name) mm/path-docid-map)))
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(unless docid (error "unknown message (%S)" (buffer-file-name)))
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;; ok, all seems well, well move the message to the sent-folder
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(mm/proc-move-msg docid mm/sent-folder "-T-D+S")
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;; we can remove the value from the hash now, if we can establish there
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;; are not other compose buffers using this very same docid...
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;; mark the buffer as read-only, as its pointing at a non-existing file
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;; now...
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(message "Message has been sent")
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(setq buffer-read-only t))))
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(defun mm/send-set-parent-flag ()
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"Set the 'replied' flag on messages we replied to, and the
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'passed' flag on message we have forwarded.
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We do this by checking for our special header, either
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`mm/reply-docid-header' or `mm/forward-docid-header'. Doing it this
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way ensure that we know the parent-docid even when re-editing
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drafts (alternatively, we could try to the 'parent' message
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using "In-reply-to"/"References", but since that is not necessarily
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accurate, doing it the way we do, is better.
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TODO: remove this header again, before really sending.
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This is meant to be called from message mode's
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`message-sent-hook'."
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;; handle the replied-to message
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(save-excursion
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(goto-char (point-min))
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(let ((eoh (when (search-forward mail-header-separator nil t)
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(point))) (reply-docid) (forward-docid))
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(when eoh ;; end-of-headers
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(goto-char (point-min))
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(if (re-search-forward
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(concat "^" mm/reply-docid-header ":[:blank:]*\\([0-9]+\\)") eoh t)
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(setq reply-docid (string-to-int (match-string 1)))
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(when (re-search-forward
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(concat "^" mm/forward-docid-header ":[:blank:]*\\([0-9]+\\)") eoh t)
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(setq forward-docid (string-to-int (match-string 1))))))
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(when reply-docid (mm/proc-flag-msg reply-docid "+R"))
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(when forward-docid (mm/proc-flag-msg forward-docid "+P")))))
|
||
|
||
(defun mm/edit-draft (docid path)
|
||
"Edit a draft message."
|
||
|
||
(unless (file-readable-p path) (error "Cannot read %s" path))
|
||
(find-file path)
|
||
(message-mode)
|
||
|
||
;; hook our functions up with sending of the message
|
||
(add-hook 'message-sent-hook 'mm/msg-save-to-sent nil t)
|
||
(add-hook 'message-sent-hook 'mm/send-set-parent-flag nil t)
|
||
|
||
(message-goto-body))
|
||
|
||
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
;; some interactive function
|
||
|
||
(defun mm/compose-new ()
|
||
"Create a draft message, and switch to an edit buffer with the
|
||
draft message."
|
||
(interactive)
|
||
(when (mm/msg-compose (mm/msg-create-new))
|
||
(message-goto-to)))
|
||
|
||
|
||
(provide 'mm-send)
|
||
|
||
|
||
|