path: root/emacsconf-mail.el

;;; emacsconf-mail.el --- Mail merge functions       -*- lexical-binding: t; -*-

;; Copyright (C) 2022  Sacha Chua

;; Author: Sacha Chua <sacha@sachachua.com>
;; Keywords: mail

;; 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 3 of the License, 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 this program.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; 

;;; Code:

(defun emacsconf-mail-groups (&optional info)
	"Group all the talks by e-mail address."
	(setq info (seq-filter (lambda (o) (plist-get o :email))
												 (emacsconf-filter-talks (or info (emacsconf-get-talk-info)))))
	(seq-group-by (lambda (o) (plist-get o :email)) info))

(defun emacsconf-mail-complete-email-group (&optional info)
  "Return (email . (talk talk))."
  (setq info (emacsconf-filter-talks (or info (emacsconf-get-talk-info))))
	(save-window-excursion
    (let* ((grouped (emacsconf-mail-groups info))
           (talk (emacsconf-resolve-talk (emacsconf-complete-talk-info info)))
           (email (plist-get talk :email)))
      (assoc email grouped))))

(defvar emacsconf-mail-prepare-behavior nil "*Modify behavior for preparing messages.
String: insert into buffer with that name
t: insert into current buffer
'new-message: always create new message.")

(defun emacsconf-mail-update-reply-headers (template _ attrs fields)
	"Update the current reply with TEMPLATE, ATTRS, and FIELDS."
	(when (plist-get template :subject)
		(message-replace-header
		 "Subject"
		 (format "%s (was %s)"
						 (emacsconf-replace-plist-in-string attrs (or (plist-get template :subject) ""))
						 (message-field-value "Subject"))))
	(mapc (lambda (field)
					(when (plist-get template (car field))
						(message-replace-header
						 (cadr field)
						 (concat (emacsconf-replace-plist-in-string attrs (plist-get template (car field)))
										 (if (message-field-value (cadr field))
												 (format
													(if (string= (cadr field) "Subject")
															" (was %s)"
														", %s")
													(message-field-value (cadr field)))
											 "")))))
				fields))

(defun emacsconf-mail-prepare-for-batch-test (template email attrs fields)
	"Put the e-mail in the `emacsconf-mail-batch-test' buffer .
Compose it using TEMPLATE, EMAIL, and ATTRS."
	(with-current-buffer (cond ((eq emacsconf-mail-prepare-behavior t) (current-buffer))
														 ((stringp emacsconf-mail-prepare-behavior) (get-buffer-create emacsconf-mail-prepare-behavior)))
		(save-excursion
			(goto-char (point-max))
			(insert
			 "* " email "\n"
			 (string-join
				(seq-keep (lambda (field)
										(and (plist-get template (car field))
												 (concat (cadr field) ": "
																 (emacsconf-replace-plist-in-string attrs (plist-get template (car field)))
																 "\n")))
									(append '((:subject "Subject")) fields))
				"")
			 (string-trim (emacsconf-replace-plist-in-string attrs (plist-get template :body)))
			 "\n\n"
			 (make-string 50 ?-)
			 "\n"))
		(emacsconf-mail-merge-wrap (point) (point-max))
		(goto-char (point-max))
		(display-buffer (current-buffer))))

(defun emacsconf-mail-uniquify-headers ()
	"Make sure the mail headers contain unique values."
	(mapc (lambda (header)
					(when (message-field-value header)
						(message-replace-header
						 header
						 (string-join (seq-uniq (seq-map #'mail-strip-quoted-names
																							 (message-tokenize-header (message-field-value header)))
																		'string=) ", "))))
				'("To" "Cc" "Bcc" "Mail-Followup-To" "Mail-Reply-To" "Reply-To"))
	;; Set Cc to only e-mail addresses not in To:
	(when (and (message-field-value "To") (message-field-value "Cc"))
		(message-replace-header
		 "Cc"
		 (string-join (seq-difference (message-tokenize-header (message-field-value "Cc"))
																	(message-tokenize-header (message-field-value "To"))
																	'string=)
									", "))))

(defun emacsconf-mail-prepare (template email attrs)
	"Prepare the e-mail following TEMPLATE. Send it to EMAIL.
Use ATTRS to fill in the template.
Behavior is modified by `emacsconf-mail-prepare-behavior'."
	(let ((fields '((:reply-to "Reply-To")
									(:mail-followup-to "Mail-Followup-To")
									(:cc "Cc")
									(:bcc "Bcc"))))
		(unless (plist-get template :bcc) (setq template (append template (list :bcc emacsconf-mail-bcc-email))))
		(if (or (eq emacsconf-mail-prepare-behavior t) (stringp emacsconf-mail-prepare-behavior))
				(emacsconf-mail-prepare-for-batch-test template email attrs fields)
			;; prepare to send the mail
			(if (and (derived-mode-p 'message-mode)
							 (string-match "unsent mail" (buffer-name))
							 (not (eq emacsconf-mail-prepare-behavior 'new-message)))
					;; add to headers
					(emacsconf-mail-update-reply-headers template email attrs fields) 
				;; compose a new message
				(compose-mail
				 email
				 (emacsconf-replace-plist-in-string attrs (or (plist-get template :subject) ""))
				 (seq-keep (lambda (field)
										 (when (plist-get template (car field))
											 (cons
												(cadr field)
												(emacsconf-replace-plist-in-string
												 attrs
												 (plist-get template (car field))))))
									 fields)))
			(message-sort-headers)
			(emacsconf-mail-uniquify-headers)
			(message-goto-body)
			(save-excursion
				(insert (string-trim (emacsconf-replace-plist-in-string attrs (plist-get template :body)))
								"\n\n")
				(goto-char (point-min))
				(emacsconf-mail-merge-wrap))
			(when (plist-get template :log-note)
				(mapc (lambda (talk)
								(emacsconf-mail-log-message-when-sent talk (plist-get template :log-note)))
							(emacsconf-mail-talks email))))))

(defun emacsconf-mail-complete-template-function ()
	"Get a mail template function."
	(intern (completing-read "Function: "
													 (or (when (derived-mode-p 'org-mode)
																 (seq-map #'intern (org-property-values "FUNCTION")))
															 #'help--symbol-completion-table)
													 (lambda (f)
														 (and (commandp f)
																	(string-match "emacsconf-mail" (symbol-name f))))
													 nil nil nil
													 (and (derived-mode-p 'org-mode) (org-entry-get (point) "FUNCTION")))))

(defun emacsconf-mail-template-to-me (template-function)
  "Set up the current template for a talk, but e-mail it only to me."
  (interactive (list (emacsconf-mail-complete-template-function)))
	(call-interactively template-function)
	(message-replace-header "To" user-mail-address))

(defun emacsconf-mail-template-to-volunteer (volunteer)
  "Prompt for a volunteer and e-mail current template to them."
  (interactive (list (with-current-buffer (find-file-noselect emacsconf-org-file))))
  (let ((template (if (org-entry-get (point) "EMAIL_ID")
                      (emacsconf-mail-merge-get-template-from-subtree)
                    (emacsconf-mail-merge-get-template
                     (completing-read "Template: " (org-property-values "EMAIL_ID")))))
        (volunteers (emacsconf-get-volunteer-info))
        (mail-func (plist-get template :function)))
    (funcall mail-func (emacsconf-complete-volunteer) template)))

;; TODO: Figure out how to rewrite this for templates that specify slugs
;; (defun emacsconf-mail-template-to-first-group ()
;;   "Draft the current template for the first group on the list."
;;   (interactive)
;;   (let* ((mail-func (emacsconf-mail-complete-template-function))
;; 				 (filtered-talks (emacsconf-mail-filter-talks-by-template template))
;; 				 (group (car (emacsconf-mail-groups (emacsconf-mail-filter-talks-by-template template)))))
;; 		(if filtered-talks
;; 				(progn
;; 					(funcall mail-func group template)
;; 					(when (plist-get template :log-note)
;; 						(mapc (lambda (talk)
;; 										(emacsconf-mail-log-message-when-sent talk (plist-get template :log-note)))
;; 									(cdr group))))
;; 			(message "All done!"))))

;; (defun emacsconf-mail-template-to-group ()
;;   "Prompt for a speaker and e-mail current template to them."
;;   (interactive)
;;   (let* ((template (if (org-entry-get (point) "EMAIL_ID")
;;                        (emacsconf-mail-merge-get-template-from-subtree)
;;                      (emacsconf-mail-merge-get-template
;;                       (completing-read "Template: " (org-property-values "EMAIL_ID")))))
;;          (mail-func (plist-get template :function))
;; 				 (filtered-talks (emacsconf-mail-filter-talks-by-template template))
;; 				 (group (emacsconf-mail-complete-email-group
;; 								 filtered-talks)))
;; 		(if filtered-talks
;; 				(progn
;; 					(funcall mail-func group template)
;; 					(when (plist-get template :log-note)
;; 						(mapc (lambda (talk)
;; 										(emacsconf-mail-log-message-when-sent talk (plist-get template :log-note)))
;; 									(cdr group))))
;; 			(message "All done!"))))

(defun emacsconf-mail-filter-talks-by-template (template)
	(let ((list (emacsconf-prepare-for-display (emacsconf-filter-talks (emacsconf-get-talk-info)))))
		(when list
			(setq list (emacsconf-filter-talks-by-slugs (plist-get template :slugs) list)))
		(when list
			(setq list (emacsconf-filter-talks-by-logbook (plist-get template :log-note) list)))
		(when list
			(setq list
						(seq-filter
						 (lambda (o) (plist-get o :email))
						 list)))
		list))

(defun emacsconf-mail-template-to-all-groups (&optional arg)
  "Uses the current template to draft messages to all the speakers.
Group by e-mail.  With prefix argument (e.g. \\[universal-argument]),
insert into the current buffer instead of drafting e-mails."
  (interactive "P")
  (let* ((mail-func (emacsconf-mail-complete-template-function))
         (grouped (emacsconf-mail-group-by-email))
				 (emacsconf-mail-prepare-behavior (if arg t 'new-message)))
    (mapc (lambda (group)
            (funcall mail-func group))
          grouped)))

(defun emacsconf-mail-log-message-when-sent (o message)
  (add-hook 'message-sent-hook
            `(lambda ()
               (save-window-excursion
                 (emacsconf-add-to-talk-logbook ,(plist-get o :slug) ,message)))
            nil t))

(defun emacsconf-mail-group-by-email (&optional info)
  (seq-group-by (lambda (o) (plist-get o :email))
								(or info (seq-filter (lambda (o) (and (plist-get o :email)
																											(not (string= (plist-get o :status) "CANCELLED"))))
																		 (emacsconf-get-talk-info)))))

;;;###autoload
(defun emacsconf-mail-speaker-from-slug (talk)
	"E-mail the speaker for TALK."
	(interactive (list (emacsconf-complete-talk-info)))
  (compose-mail (plist-get talk :email)))

(defun emacsconf-mail-speaker (&optional subject body talk)
  "Compose a message to the speaker of the current talk."
  (interactive (list nil nil (emacsconf-complete-talk-info)))
  (compose-mail (plist-get talk :email) subject)
  (when body (message-goto-body) (insert body)))

(defun emacsconf-mail-speaker-schedule (&optional subject body)
  (interactive (list (read-string "Subject: ") nil))
  (let ((info (emacsconf-get-talk-info-for-subtree)))
    (emacsconf-mail-speaker subject body)
    (when body (message-goto-body) (insert body))
    (goto-char (point-max))
    (insert (string-join (emacsconf-timezone-strings info) "\n"))))

(defvar emacsconf-submit-email "emacsconf-submit@gnu.org" "E-mail address for submissions.")

(defun emacsconf-mail-speaker-cc-submit (&optional subject body)
  "Compose a message to the speaker of the current talk."
  (interactive)
  (compose-mail (format "%s <%s>" (org-entry-get (point) "NAME") (org-entry-get (point) "EMAIL"))
                subject '(("Reply-To" . emacsconf-submit-email) ("Cc" . emacsconf-submit-email)))
  (message-goto-body)
  (when body (insert body))
  (save-excursion (insert "Please keep " emacsconf-submit-email " in the To: or Cc: when replying. Thank you!")))

(defun emacsconf-mail-show-talk-info ()
  (interactive)
  (let ((email (or (mail-fetch-field "reply-to") (mail-fetch-field "from"))))
    (when (string-match "<\\(\\(\\sw\\|\\s_\\|\\s.\\)+@\\(\\sw\\|\\s_\\|\\s.\\)+\\)>" email)
      (setq email (match-string 1 email)))
    (pop-to-buffer (find-file-noselect emacsconf-org-file))
    (goto-char (point-min))
    (goto-char
     (or (org-find-property "EMAIL" email)
         (org-find-property "NAME"
                            (completing-read "Name: " (delq nil (org-map-entries (lambda () (org-entry-get "NAME"))))))))))





(defun emacsconf-mail-merge-wrap (&optional beg end)
  (interactive "r")
	(unless beg (setq beg (point-min)))
	(unless end (setq end (point-max)))
  (with-undo-amalgamate 
    (save-excursion
			(goto-char beg)
      (while (re-search-forward " *${\\(wrap\\|fill\\)}" end t)
        (replace-match "")
        (fill-paragraph)))))

(defun emacsconf-mail-merge-get-template-from-subtree ()
  (list :subject (org-entry-get-with-inheritance "SUBJECT")
        :cc (org-entry-get-with-inheritance "CC")
        :slugs (org-entry-get-with-inheritance "SLUGS")
        :reply-to (or (org-entry-get-with-inheritance "REPLY_TO") (org-entry-get-with-inheritance "REPLY-TO"))
        :mail-followup-to (or (org-entry-get-with-inheritance "MAIL_FOLLOWUP_TO")
                              (org-entry-get-with-inheritance "MAIL-FOLLOWUP-TO"))
        :body (replace-regexp-in-string "\n *," "\n"
                                        (buffer-substring-no-properties
                                         (progn
                                           (org-back-to-heading)
                                           (org-end-of-meta-data) (point))
                                         (org-end-of-subtree)))
        :function (when (org-entry-get-with-inheritance "FUNCTION")
                    (intern (org-entry-get-with-inheritance "FUNCTION")))
				:log-note (org-entry-get-with-inheritance "LOG_NOTE")))

(defun emacsconf-mail-merge-get-template (id)
  "Return the information for the e-mail template with EMAIL_ID set to ID."
  (save-excursion
    (let ((char (org-find-property "EMAIL_ID" id)))
      (if char
          (progn (goto-char char) (emacsconf-mail-merge-get-template-from-subtree))
        (with-current-buffer
            (find-file-noselect (expand-file-name "organizers-notebook/index.org" (expand-file-name emacsconf-year emacsconf-directory)))
          (setq char (org-find-property "EMAIL_ID" id))
          (if char
              (progn
                (goto-char char)
                (emacsconf-mail-merge-get-template-from-subtree))
            ;; Try the conf.org file
            (with-current-buffer (find-file-noselect emacsconf-org-file)
              (setq char (org-find-property "EMAIL_ID" id))
              (if char
                  (progn
                    (goto-char char)
                    (emacsconf-mail-merge-get-template-from-subtree))
                (error "Could not find template %s" id)))))))))

(defun emacsconf-mail-parse-submission (body)
	"Extract data from EmacsConf submissions in BODY."
	(when (listp body) (setq body (plist-get (car body) :content)))
	(let* ((data (list :body body))
				 (fields '((:title "^[* ]*Talk title")
									 (:description "^[* ]*Talk description")
									 (:format "^[* ]*Format")
									 (:intro "^[* ]*Introduction for you and your talk")
									 (:name "^[* ]*Speaker name")
									 (:availability "^[* ]*Speaker availability")
									 (:q-and-a "^[* ]*Preferred Q&A approach")
									 (:public "^[* ]*Public contact information")
									 (:private "^[* ]*Private emergency contact information")
									 (:release "^[* ]*Please include this speaker release")))
				 field
				 (field-regexp (mapconcat
												(lambda (o)
													(concat "\\(?:" (cadr o) "\\)"))
												fields "\\|")))
		(with-temp-buffer
			(insert body)
			(goto-char (point-min))
			;; Try to parse it
			(catch 'done
				(while (not (eobp))
					;; skip the field title
					(unless (looking-at field-regexp)
						(unless (re-search-forward field-regexp nil t)
							(throw 'done nil)))
					(goto-char (match-beginning 0))
					(setq field (seq-find (lambda (o)
																	(looking-at (cadr o)))
																fields))
					(when field
						;; get the text between this and the next field
						(re-search-forward "\\(:[ \t\n]+\\|\n\n\\)" nil t)
						(setq data
									(plist-put
									 data
									 (car field)
									 (buffer-substring
										(point)
										(or (and
												 (re-search-forward field-regexp nil t)
												 (goto-char (match-beginning 0))
												 (point))
												(point-max))))))))
			(if (string-match "[0-9]+" (or (plist-get data :format) ""))
					(plist-put data :time (match-string 0 (or (plist-get data :format) ""))))
			data)))

;; Documented in https://sachachua.com/blog/2023/09/emacsconf-capturing-submissions-from-e-mails/
;;;###autoload
(defun emacsconf-mail-add-submission (slug)
	"Add the submission from the current e-mail."
	(interactive "MTalk ID: ")
	(let* ((props (notmuch-show-get-message-properties))
				 (from (or (plist-get (plist-get props :headers) :Reply-To)
									 (plist-get (plist-get props :headers) :From)))
				 (body (plist-get
								(car
								 (plist-get props :body))
								:content))
				 (date (format-time-string "%Y-%m-%d"
																	 (date-to-time (plist-get (plist-get props :headers) :Date))))
				 (to-notify (format-time-string
										 "%Y-%m-%d"
										 (time-add
											(days-to-time emacsconf-review-days)
											(date-to-time (plist-get (plist-get props :headers) :Date)))))
				 (data (emacsconf-mail-parse-submission body)))
		(when (string-match "<\\(.*\\)>" from)
			(setq from (match-string 1 from)))
		(with-current-buffer
				(find-file emacsconf-org-file)
			;;  go to the submissions entry
			(goto-char (org-find-property "CUSTOM_ID" "submissions"))
			(when (org-find-property "CUSTOM_ID" slug)
				(error "Duplicate talk ID")))
		(find-file emacsconf-org-file)
		(delete-other-windows)
		(outline-next-heading)
		(org-insert-heading)
		(insert " " (or (plist-get data :title) "") "\n")
		(org-todo "TO_REVIEW")
		(org-entry-put (point) "CUSTOM_ID" slug)
		(org-entry-put (point) "SLUG" slug)
		(org-entry-put (point) "TRACK" "General")
		(org-entry-put (point) "EMAIL" from)
		(org-entry-put (point) "DATE_SUBMITTED" date)
		(org-entry-put (point) "DATE_TO_NOTIFY" to-notify)
		(when (plist-get data :time)
			(org-entry-put (point) "TIME" (plist-get data :time)))
		(when (plist-get data :availability)
			(org-entry-put (point) "AVAILABILITY"
										 (replace-regexp-in-string "\n+" " "
																							 (plist-get data :availability))))
		(when (plist-get data :public)
			(org-entry-put (point) "PUBLIC_CONTACT"
										 (replace-regexp-in-string "\n+" " "
																							 (plist-get data :public))))
		(when (plist-get data :private)
			(org-entry-put (point) "EMERGENCY"
										 (replace-regexp-in-string "\n+" " "
																							 (plist-get data :private))))
		(when (plist-get data :q-and-a)
			(org-entry-put (point) "Q_AND_A"
										 (replace-regexp-in-string "\n+" " "
																							 (plist-get data :q-and-a))))
		(save-excursion
			(insert (plist-get data :body)))
		(re-search-backward org-drawer-regexp)
		(org-fold-hide-drawer-toggle 'off)
		(org-end-of-meta-data)
		(split-window-below)))

(defun emacsconf-mail-merge-fill (string)
  "Fill in the values for STRING using the properties at point.
Include some other things, too, such as emacsconf-year, title, name, email, url, and duration."
  (let (start (values `(("year" . ,emacsconf-year)
												("title" . ,(org-entry-get (point) "ITEM"))
												("name" . ,(org-entry-get (point) "NAME"))
												("email" . ,(org-entry-get (point) "EMAIL"))
												("url" . ,(format "%s%s/talks/%s" emacsconf-base-url emacsconf-year (org-entry-get (point) "SLUG")))
												("duration" . ,(org-entry-get (point) "TIME")))))
    (while (string-match "\\${\\([-a-zA-Z_]+?\\)}" string start)
      (if (assoc-default (match-string 1 string) values)
          (setq string (replace-match (assoc-default (match-string 1 string) values) t t string))
        (setq string (replace-match (save-match-data (org-entry-get (point) (match-string 1 string))) t t string)))
      (setq start (1+ (match-beginning 0))))
    string))

(defun emacsconf-mail-merge-format-email-address-for-subtree ()
  (if (string-match  "," (org-entry-get (point) "EMAIL"))
      (org-entry-get (point) "EMAIL")
    (format "%s <%s>" (org-entry-get (point) "NAME") (org-entry-get (point) "EMAIL"))))

(defun emacsconf-mail-merge-for-subtree (id note-field)
  (let* ((template (emacsconf-mail-merge-get-template id))
         (body (emacsconf-mail-merge-fill (plist-get template :body)))
         (subject (emacsconf-mail-merge-fill (plist-get template :subject)))
         (note (org-entry-get (point) note-field)))
    (compose-mail (emacsconf-mail-merge-format-email-address-for-subtree)
                  subject
                  `(("Reply-To" . ,(plist-get template :reply-to))
                    ("Mail-Followup-To" . ,(plist-get template :mail-followup-to))
                    ("Cc" . ,(plist-get template :cc))
										("Bcc" . ,(plist-get template :bcc))))
    (message-goto-body)
    (save-excursion 
      (when note (insert "#+NOTE: " note "\n======== Delete above before sending =============\n\n"))
      (insert body))))

(defun emacsconf-mail-merge-cancel ()
  (interactive)
  (mapc (lambda (buffer)
          (when (string-match "unsent" (buffer-name buffer))
            (let ((kill-buffer-query-functions nil)
                  (buffer-modified-p nil))
              (set-buffer-modified-p nil)
              (kill-buffer buffer))))
        (buffer-list)))

;;; Notmuch

;;;###autoload
(defun emacsconf-mail-notmuch-search-for-talk (talk)
  "Search for e-mail related to TALK."
  (interactive (list (emacsconf-complete-talk-info))) 
  (notmuch-search
   (concat
    (mapconcat
     (lambda (o)
       (format "from:%s or to:%s" o o))
     (split-string (plist-get talk :email) " *, *")
     " or ")
    ;; " or (" emacsconf-id " and " (plist-get talk :slug) ")"
		)))

;;; Volunteers

(defun emacsconf-mail-volunteers (volunteers)
  (interactive
   (list
    (completing-read-multiple
     "Volunteers: " (emacsconf-volunteer-emails-for-completion))))
  (compose-mail (string-join volunteers ", ")))

(defun emacsconf-mail-notmuch-search-for-volunteer (volunteer)
  (interactive
   (list
    (completing-read
     "Volunteer: " (emacsconf-volunteer-emails-for-completion))))
  (let ((email (if (string-match "<\\(.*?\\)>" volunteer) (match-string 1) volunteer)))
    (notmuch-search (format "from:%s or to:%s" email email))))

;;;###autoload
(defun emacsconf-mail-check-for-zzz-before-sending ()
	"Throw an error if the ZZZ todo marker is still in the message.
Good for adding to `message-send-hook'."
	(save-excursion
		(goto-char (point-min))
		(when (re-search-forward "ZZZ" nil t)
			(unless (yes-or-no-p "ZZZ marker found. Send anyway? ")
				(error "ZZZ marker found.")))))

(defun emacsconf-mail-insert-info (talk)
	"Insert mail info for TALK for easy reference.
This includes NAME_SHORT and EMAIL_NOTES."
	(interactive (list (emacsconf-complete-talk-info)))
	(setq talk (emacsconf-resolve-talk talk))
	(let ((info (concat (emacsconf-surround "Hi, " (plist-get talk :speakers-short) "!\n\n" "")
											(emacsconf-surround "--- ZZZ ---\n" (plist-get talk :email-notes) "\n------\n\n" ""))))
		(unless (string= info "")
			(save-excursion (insert info)))))

;;; Templates

;;;###autoload
(defun emacsconf-mail-review (talk)
	"Let the speaker know we've received their proposal."
	(interactive (list (emacsconf-complete-talk-info)))
	(emacsconf-mail-prepare '(:subject "${conf-name} ${year} review: ${title}"
											 :cc "emacsconf-submit@gnu.org"
											 :reply-to "emacsconf-submit@gnu.org, ${email}, ${user-email}"
											 :mail-followup-to "emacsconf-submit@gnu.org, ${email}, ${user-email}"
											 :body "
Hi, ${speakers-short}!

Thanks for submitting your proposal! (ZZZ TODO: feedback)

We'll wait a week (~ ${notification-date}) in case the other volunteers want to chime in regarding your talk. =)

${signature}
")
						(plist-get talk :email)
						(list
						 :user-email user-mail-address
						 :signature user-full-name
						 :title (plist-get talk :title)
						 :email (plist-get talk :email)
						 :conf-name emacsconf-name
						 :speakers-short (plist-get talk :speakers-short)
						 :year emacsconf-year
						 :notification-date (plist-get talk :date-to-notify))))

(defun emacsconf-mail-accept-talk (talk)
	"Send acceptance letter."
  (interactive (list (emacsconf-complete-talk-info)))
  (emacsconf-mail-prepare '(:subject "${conf-name} ${year} acceptance: ${title}"
											 :cc "emacsconf-submit@gnu.org"
											 :slugs nil
											 :reply-to "emacsconf-submit@gnu.org, ${email}, ${user-email}"
											 :mail-followup-to "emacsconf-submit@gnu.org, ${email}, ${user-email}"
											 :body
											 "
Hi, ${speakers-short}!

Looks like all systems are a go for your talk. Thanks for
proposing it! Your talk page is now at ${url} . Please feel free
to update it or e-mail us if you'd like help with any changes.${fill}

If you want to get started on your talk early, we have some
instructions at ${base}${year}/prepare/ that might help.
We strongly encourage speakers to prepare a talk video by
${video-target-date} in order to reduce technical risks and make
things flow more smoothly. Plus, we might be able to get it captioned
by volunteers, just like the talks last year. We'll save ${time} minutes
for your talk, not including time for Q&A. Don't sweat it if
you're a few minutes over or under. If it looks like a much shorter or
longer talk once you start getting into it, let us know and we might
be able to adjust.${wrap}

I'll follow up with the specific schedule for your talk once things
settle down. In the meantime, please let us know if you have any
questions or if there's anything we can do to help out!

${signature}"
											 :function emacsconf-mail-accept-talk
											 :log-note "accepted talk")
   (plist-get talk :email)
   (list
		:base emacsconf-base-url
		:user-email user-mail-address
		:year emacsconf-year
		:signature user-full-name
		:conf-name emacsconf-name
		:title (plist-get talk :title)
		:email (plist-get talk :email)
		:time (plist-get talk :time)
		:speakers-short (plist-get talk :speakers-short)
		:url (concat emacsconf-base-url (plist-get talk :url))
		:video-target-date emacsconf-video-target-date)))

(defvar emacsconf-mail-bcc-email "*Extra e-mail address to Bcc for delivery confirmation.")

(defun emacsconf-mail-format-talk-schedule (o)
	"Format the schedule for O for inclusion in mail messages etc."
	(interactive (list (emacsconf-complete-talk)))
	(when (stringp o)
		(setq o
					(emacsconf-resolve-talk
					 (emacsconf-get-slug-from-string o)
					 (or emacsconf-schedule-draft (emacsconf-get-talk-info)))))
	(let ((result
				 (concat
					(plist-get o :title) "\n"
					(format-time-string "%b %-e %a %-I:%M %#p %Z" (plist-get o :start-time) emacsconf-timezone) "\n"
					(if (and (plist-get o :timezone) (not (string= (plist-get o :timezone) emacsconf-timezone)))
							(if (string= (format-time-string "%z" (plist-get o :start-time) (plist-get o :timezone))
													 (format-time-string "%z" (plist-get o :start-time) emacsconf-timezone))
									(format "which is the same time in your local timezone %s\n"
													(emacsconf-schedule-rename-etc-timezone (plist-get o :timezone)))
								(format "translated to your local timezone %s: %s\n"
												(emacsconf-schedule-rename-etc-timezone (plist-get o :timezone))
												(format-time-string "%b %-e %a %-I:%M %#p %Z" (plist-get o :start-time) (plist-get o :timezone))))
						""))))
		(when (called-interactively-p 'any)
			(insert result))
		result))

(defun emacsconf-mail-draft-schedule (group &optional arg)
	"Send draft schedule to speakers.
GROUP is (email . (talk talk talk)).
If called with ARG, insert into current buffer instead of composing or updating a message."
  (interactive (list (emacsconf-mail-complete-email-group) current-prefix-arg))
	(let ((emacsconf-mail-prepare-behavior (if arg t emacsconf-mail-prepare-behavior)))
		(emacsconf-mail-prepare
		 (list
			:subject
			"${conf-name} ${year} draft schedule FYI: ${slugs}"
			:reply-to "emacsconf-submit@gnu.org, ${email}, ${user-email}"
			:mail-followup-to "emacsconf-submit@gnu.org, ${email}, ${user-email}"
			:filter (lambda (talk)
								(and (plist-get talk :email)
										 (not (string= (plist-get talk :status) "CANCELLED"))))
			:body
			(if (emacsconf-schedule-q-and-a-p (cadr group))
					;; live
					"${email-notes}Hi, ${speakers-short}!

There are so many wonderful talks at ${conf-name} this year! I
think we're going to have a two-track conference again, so I
wanted to run the draft schedule by you in case you had any
comments or requests.

You can see the draft schedule at
${base}${year}/organizers-notebook/?highlight=${slugs}#draft-schedule
.  If you use a Javascript-enabled browser, your talk${plural}
will be highlighted with a black border in the schedule, and your
talk ID${plural} (${slugs}) will be highlighted with a yellow
background in the notes that follow.${wrap}

As of the time I write this e-mail, your tentative schedule is:

${schedule}
${availability-note}${timezone-note}I might also be able to move things around if you want to
attend any conflicting Q&A sessions or if your availability
changes.${wrap}

Things may have changed a little depending on what other speakers
have asked for, and we'll also update the schedule as we get
closer to the conference. I'll let you know if the schedule for
your talk${plural} changes by more than 2 hours, and we'll send
the updated schedule along with check-in instructions before the
conference.${wrap}

We plan to announce the schedule to the general public on
${schedule-announcement-date}, so we'd love to incorporate any
schedule feedback before then.${wrap}

In the meantime, good luck working on your presentation. ${todos}
Looking forward to ${conf-name} with you!

${signature}
"
				;; after the event
				"${email-notes}Hi, ${speakers-short}!

There are so many wonderful talks at ${conf-name} this year! I
think we're going to have a two-track conference again. You've
indicated that you'd like to take questions after the conference,
so that's totally all right. You don't have to make it to the
time your talk is scheduled; this e-mail is just to keep you up
to date. =)

You can see the draft schedule at
${base}${year}/organizers-notebook/?highlight=${slugs}#draft-schedule
.  If you use a Javascript-enabled browser, your talk${plural}
will have a black border in the schedule and a yellow background
in the notes that follow.

We'll also update the schedule as we get closer to the
conference, but I'll let you know if things change a lot. Anyway,
that's how things are shaping up.

In the meantime, good luck working on your presentation. ${todos}
Looking forward to ${conf-name} with you!

${signature}
"))
		 (plist-get (cadr group) :email)
		 (list
			:schedule-announcement-date emacsconf-schedule-announcement-date
			:slugs (mapconcat (lambda (o) (plist-get o :slug)) (cdr group) ",")
			:email (plist-get (cadr group) :email)
			:base emacsconf-base-url
			:user-email user-mail-address
			:year emacsconf-year
			:signature user-full-name
			:conf-name emacsconf-name
			:speakers-short (plist-get (cadr group) :speakers-short)
			:plural (if (= 1 (length (cdr group))) "" "s")
			:todos
			(concat
			 (if (= 1 (length (cdr group))) "Here's a handy TODO you can use if you want:" "Here are handy TODOs you can use if you want:")
			 "\n\n"
			 (mapconcat
				(lambda (o)
					(emacsconf-replace-plist-in-string
					 (list :title (plist-get o :title)
								 :conf-name emacsconf-name
								 :year emacsconf-year
								 :video-target-date (format-time-string "%Y-%m-%d %a" (date-to-time emacsconf-video-target-date))
								 :submit-email emacsconf-submit-email
								 :base emacsconf-base-url
								 :q-and-a (if (emacsconf-schedule-q-and-a-p o) " (+ time afterwards for Q&A)" "")
								 :time (plist-get o :time)
								 :url (plist-get o :url))
					 "** TODO Prepare \"${title}\" for ${conf-name} ${year}
   DEADLINE: <${video-target-date}>
   (feel free to send it in earlier; let us know at ${submit-email} you're running late)
   Reserved time: ${time} minutes${q-and-a}
   Instructions: ${base}${year}/prepare/
   Talk page: ${base}${url}
"))
				(cdr group) "\n\n"))
			:email-notes (emacsconf-surround "ZZZ: " (plist-get (cadr group) :email-notes) "\n\n" "")
			:schedule
			(emacsconf-indent-string (mapconcat #'emacsconf-mail-format-talk-schedule (cdr group) "\n") 2)
			:availability-note
			(if (delq nil (emacsconf-schedule-get-time-constraint (cadr group)))
					(emacsconf-replace-plist-in-string
					 (list :constraint (emacsconf-schedule-format-time-constraint (cadr group) t (plist-get (cadr group) :timezone)))
					 "I'm using \"${constraint}\" as the availability constraint for you when planning the talks, but since I sometimes mess up encoding these things, could you please doublecheck that this works for you? ")
				"I think you've indicated being available during the conference hours. Thanks for your flexibility. ")
			:timezone-note
			(if (plist-get (cadr group) :timezone)
					(emacsconf-replace-plist-in-string
					 (append
						(list :renamed-timezone (emacsconf-schedule-rename-etc-timezone (plist-get (cadr group) :timezone)))
						(cadr group))
					 "Just let me know if you want us to use a different timezone for translating times in future e-mails. ")
				"I don't think I have a timezone noted for you yet. If you want, I can translate times into your local timezone for you in future e-mails. Just let me know what you would like. ")))))

(defun emacsconf-mail-acknowledge-upload (talk)
	"Acknowledge uploaded files for TALK."
  (interactive (list (emacsconf-complete-talk-info)))
	(emacsconf-mail-prepare
	 '(:subject "${conf-name} ${year}: received uploaded files for ${title}"
							:cc "emacsconf-submit@gnu.org"
							:reply-to "emacsconf-submit@gnu.org, ${email}, ${user-email}"
							:mail-followup-to "emacsconf-submit@gnu.org, ${email}, ${user-email}"
							:body
							"Hi, ${speakers-short}!

Just a quick note to let you know that I've downloaded your file${plural} for \"${title}\".
Now we have the following file${plural} starting with ${file-prefix}:

${file-list}
We'll be working on captioning your talk over the next few weeks. We'll e-mail again a little closer to the conference with schedule updates and other useful information. If you want to upload a new version, you can upload it the same way you did the previous one.

Please feel free to e-mail us at ${submit-email} if you need help updating the talk wiki page at ${base}${url} or if you have other questions.

Thank you so much for all the work you put into preparing a talk for ${conf-name} ${year}, and thank you for submitting the prerecorded video before the conference!

${signature}")
	 (plist-get talk :email)
	 (let ((default-directory emacsconf-cache-dir)
				 (files (directory-files emacsconf-cache-dir
																 t (regexp-quote (plist-get talk :file-prefix)))))
		 (list
			:title (plist-get talk :title)
			:conf-name emacsconf-name
			:year emacsconf-year
			:base emacsconf-base-url
			:url (plist-get talk :url)
			:email (plist-get talk :email)
			:submit-email emacsconf-submit-email
			:plural (if (= 1 (length files)) "" "s")
			:file-prefix (plist-get talk :file-prefix)
			:signature user-full-name
			:user-email user-mail-address
			:speakers-short (plist-get talk :speakers-short)
			:file-list
			(mapconcat
			 (lambda (file)
				 (concat
					(format "- %s\n  File size: %s, MD5 sum: %s\n"
									(replace-regexp-in-string (plist-get talk :file-prefix)
																						"" (file-name-nondirectory file))
									(file-size-human-readable (file-attribute-size (file-attributes file)))
									(string-trim
									 (shell-command-to-string
										(concat "md5sum " (shell-quote-argument file) " | cut -f 1 -d ' '"))))
					(if (member (file-name-extension file) emacsconf-media-extensions)
							(format "  (around %d minutes long)\n"
											(ceiling
											 (/ (emacsconf-get-file-duration-ms file)
													60000.0)))
						"")))
			 files
			 "\n")))))

(defun emacsconf-mail-captions-for-approval (talk)
  (interactive (list (emacsconf-complete-talk-info)))
  (let ((captions (expand-file-name (concat (plist-get talk :file-prefix) "--main.vtt")
                                    emacsconf-cache-dir))
        (captioner-info
         (with-current-buffer (find-file-noselect emacsconf-org-file)
           (org-entry-properties (org-find-property "CUSTOM_ID" (plist-get talk :captioner))))))
    (emacsconf-mail-prepare
     (emacsconf-mail-merge-get-template "captions")
     (plist-get talk :email)
     (list
      :speakers-short (plist-get talk :speakers-short)
      :year emacsconf-year
      :email (plist-get talk :email)
      :title (plist-get talk :title)
      :captioner (assoc-default "NAME_SHORT" captioner-info)
      :url
      (format "https://%s:%s@media.emacsconf.org/%s/backstage/#%s"
              emacsconf-backstage-user
              emacsconf-backstage-password
              emacsconf-year
              (plist-get talk :slug))
      :password emacsconf-backstage-password
      :captioner-email (assoc-default "EMAIL" captioner-info)
      :captioner-volunteered
      (if (string= (plist-get talk :captioner) "sachac")
          ""
        (format "%s volunteered to edit the captions for your video. " (assoc-default "NAME_SHORT" captioner-info)))
      :chapters-note
      (if (file-exists-p
           (expand-file-name (concat (plist-get talk :file-prefix) "--main--chapters.vtt")
                             emacsconf-cache-dir))
          "I've come up with some potential chapter headings which you can see as NOTE in the transcript or in the backstage entry for your video. Let me know if you want to tweak those.\n\n"
        "")
      :intro-note
      (emacsconf-surround
       "${wrap}Also, I drafted a quick intro for the host to read. Let me know if you want to tweak this: " (plist-get talk :intro-note) "\n\n"
       "")
      :captioner-thanks
      (if (string= (plist-get talk :captioner) "sachac")
          ""
        (format "%s: Thank you for editing the captions!\n\n" (assoc-default "NAME_SHORT" captioner-info)))
      :captions (mapconcat (lambda (sub) (concat (emacsconf-surround "\n" (elt sub 4) "" "") (elt sub 3))) (subed-parse-file captions) "\n")))
    (mml-attach-file captions "text/vtt" "Subtitles" "attachment")))

(defun emacsconf-mail-backstage-info (group)
	"E-mail backstage access information to GROUP."
  (interactive (list (emacsconf-mail-complete-email-group)))
  (emacsconf-mail-prepare
	 (list
		:subject "EmacsConf backstage area with videos and other resources"
		:reply-to "emacsconf-submit@gnu.org, ${email}, ${user-email}"
		:mail-followup-to "emacsconf-submit@gnu.org, ${email}, ${user-email}"
		:log-note "sent backstage information"
		:body
		"Hi ${name}!

You're getting this e-mail because you are a ${role} for ${conf-name} ${year}. (Thanks!)
As a perk, you get early access as the talks come in.${fill}

We've set up ${backstage} as the backstage area where you can view the
videos and resources uploaded so far. You can access it with the
username \"${backstage-user}\" and the password \"${backstage-password}\".
Please keep the backstage password and other speakers' talk resources
secret. ${backstage-use}${fill}

Thank you!

${signature}")
   (car group)
   (list
    :backstage (emacsconf-replace-plist-in-string
								(list :year emacsconf-year)
								"https://media.emacsconf.org/${year}/backstage/")
		:role (or (plist-get (cadr group) :role) "speaker")
		:plural (if (= 1 (length (cdr group))) "" "s")
		:backstage-use
		(cond
		 ((string= (plist-get (cadr group) :role) "volunteer")
			"If you see a talk that you'd like to caption, please let us know and we can reserve it for you.")
		 ((string= (plist-get (cadr group) :status) "WAITING_FOR_PREREC")
			"As we add more talks, you can skim through any relevant ones to
see if there are any points you'd like to build on in your talk.
Also, you can get a sense of what we do behind the scenes to try
to get as many talks captioned for broadcast, and what you can do
to make it easier. (A script or a text file with names and
technical terms can be helpful. No need to type out a manual
transcript if you don't start from a script.) After you upload
your talk and we process the files, you can use the backstage
area to check the quality of the reencoded video.")
		 (t
			"You can confirm the quality of your talk's reencoding to make sure everything plays as well as you'd like (and
check the captions after they're edited), and you can watch other
people's talks too."))
    :backstage-user emacsconf-backstage-user
    :backstage-password emacsconf-backstage-password
		:name (plist-get (cadr group) :speakers-short)
		:email (car group)
		:user-email user-mail-address
    :signature user-full-name
		:conf-name emacsconf-name
    :year emacsconf-year)))

(defun emacsconf-mail-backstage-info-to-speakers-and-captioners ()
  (interactive)
  (let ((template (emacsconf-mail-merge-get-template "backstage"))
        (speaker-groups
         (seq-uniq
          (mapcar
           (lambda (talk)
             (list
              :name (plist-get talk :speakers-short)
              :email (plist-get talk :email)
              :role "speaker"
              :backstage-use
              "As we add more talks, you can skim through any relevant ones to
see if there are any points you'd like to build on in your talk.
Also, you can get a sense of what we do behind the scenes to try
to get as many talks captioned for broadcast, and what you can do
to make it easier. (A text file with names and technical terms
can be helpful. No need to type out a manual transcript if you
don't start from a script.) After you upload your talk and we
process the files, you can use the backstage area to check the
quality of the reencoded video."))
           (seq-filter (lambda (o) (string= (plist-get o :status) "WAITING_FOR_PREREC"))
                       (emacsconf-filter-talks (emacsconf-get-talk-info))))))
        (volunteer-groups
         (with-current-buffer (find-file-noselect emacsconf-org-file)
           (org-map-entries (lambda ()
                              (list :name (org-entry-get (point) "NAME_SHORT")
                                    :email (org-entry-get (point) "EMAIL")
                                    :role "captioning volunteer"
                                    :backstage-use "If you see a talk that you'd like to caption, you can e-mail me at sacha@sachachua.com and I can reserve it for you."))
                            "captions"))))
    (mapcar (lambda (g) (emacsconf-mail-backstage-info g template))
            (append
             speaker-groups
             (seq-remove (lambda (v) (seq-find (lambda (s) (string= (plist-get s :email)
                                                                    (plist-get v :email)))
                                               speaker-groups))
                         volunteer-groups)))))

;;; Other mail functions

(defun emacsconf-mail-verify-delivery (groups subject)
	"Verify that the email addresses in GROUPS have all received an email with SUBJECT."
	(interactive (list (emacsconf-mail-groups (seq-filter (lambda (o) (not (string= (plist-get o :status) "CANCELLED")))
																					(emacsconf-get-talk-info)))
										 (read-string "Subject: ")))
	(let ((missing
				 (seq-keep (lambda (group)
										 (and (string= "0"
																	 (string-trim
																		(shell-command-to-string
																		 (format "notmuch count to:%s and to:%s and subject:%s"
																						 (shell-quote-argument (car group))
																						 (shell-quote-argument emacsconf-mail-bcc-email)
																						 subject))))
													(car group)))
									 groups)))
		(if missing
				(prin1 missing)
			(message "All good."))))

(defun emacsconf-mail-get-all-email-addresses (talk)
	"Return all the possible e-mail addresses for TALK."
	(split-string
	 (downcase
		(string-join
		 (seq-uniq
			(seq-keep
			 (lambda (field) (plist-get talk field))
			 '(:email :public-email :email-alias)))
		 ","))
	 " *, *"))

(defvar emacsconf-mail-notmuch-tag "emacsconf" "Tag to use when searching the Notmuch database for mail.")
(defun emacsconf-mail-notmuch-last-message-for-talk (talk &optional subject)
	"Return the most recent message from the speakers for TALK.
Limit to SUBJECT if specified."
	(let ((message (json-parse-string
									(shell-command-to-string
									 (format "notmuch search --limit=1 --format=json %s%s\""
													 (mapconcat
														(lambda (email) (concat "from:" (shell-quote-argument email)))
														(emacsconf-mail-get-all-email-addresses talk)
														" or ")
													 (emacsconf-surround
														" and "
														(and emacsconf-mail-notmuch-tag (shell-quote-argument emacsconf-mail-notmuch-tag))
														"" "")
													 (emacsconf-surround
														" and subject:"
														(and subject (shell-quote-argument subject)) "" "")))
									:object-type 'alist)))
		(cons `(email . ,(plist-get talk :email))
					(when (> (length message) 0)
						(elt message 0)))))

(defun emacsconf-mail-notmuch-visit-thread-from-summary ()
	"Display the thread from the summary."
	(interactive)
	(let (message-buffer)
		(save-window-excursion
			(setq message-buffer (notmuch-show (tabulated-list-get-id))))
		(display-buffer message-buffer t)))

(defun emacsconf-mail-notmuch-show-latest-messages-from-speakers (groups &optional subject)
	"Verify that the email addresses in GROUPS have e-mailed recently.
When called interactively, pop up a report buffer showing the e-mails
and messages by date, with oldest messages on top.
This minimizes the risk of mail delivery issues and radio silence."
	(interactive (list (emacsconf-mail-groups (seq-filter
															 (lambda (o) (not (string= (plist-get o :status) "CANCELLED")))
															 (emacsconf-get-talk-info)))))
	(let ((results
				 (sort (mapcar
								(lambda (group)
									(emacsconf-mail-notmuch-last-message-for-talk (cadr group) subject))
								groups)
							 (lambda (a b)
								 (< (or (alist-get 'timestamp a) -1)
										(or (alist-get 'timestamp b) -1))))))
		(when (called-interactively-p 'any)
			(with-current-buffer (get-buffer-create "*Mail report*")
				(let ((inhibit-read-only t))
					(erase-buffer))
				(tabulated-list-mode)
				(setq
				 tabulated-list-entries
				 (mapcar
					(lambda (row)
						(list
						 (alist-get 'thread row)
						 (vector
							(alist-get 'email row)
							(or (alist-get 'date_relative row) "")
							(or (alist-get 'subject row) ""))))
					results))
				(setq tabulated-list-format [("Email" 30 t)
																		 ("Date" 10 nil)
																		 ("Subject" 30 t)])
				(local-set-key (kbd "RET") #'emacsconf-mail-notmuch-visit-thread-from-summary)
				(tabulated-list-print)
				(tabulated-list-init-header)
				(pop-to-buffer (current-buffer))))
		results))

(defun emacsconf-mail-talks (email)
	"Return a list of talks matching EMAIL."
	(setq email (downcase (mail-strip-quoted-names email)))
	(seq-filter
	 (lambda (o) (member email (emacsconf-mail-get-all-email-addresses o)))
	 (emacsconf-get-talk-info)))

(defun emacsconf-mail-add-to-logbook (email note)
	"Add to logbook for all matching talks from this speaker."
	(interactive
	 (let* ((email (mail-strip-quoted-names
									(plist-get (plist-get (notmuch-show-get-message-properties) :headers)
														 :From)))
					(talks (emacsconf-mail-talks email)))
		 (list
			email
			(read-string (format "Note for %s: "
													 (mapconcat (lambda (o) (plist-get o :slug))
																			talks", "))))))
	(save-window-excursion
		(mapc
		 (lambda (talk)
			 (emacsconf-add-to-talk-logbook talk note))
		 (emacsconf-mail-talks email))))

(defun emacsconf-mail-notmuch-save-attachments-to-cache (talk)
	"Save the attached files to the cache and backstage dir for TALK."
	(interactive (list (emacsconf-complete-talk-info)))
	(with-current-notmuch-show-message
	 (notmuch-foreach-mime-part
		(lambda (part)
			(when (string= (car (mm-handle-disposition part)) "attachment")
				(prin1 part)
				(let* ((filename (or (mail-content-type-get
															(mm-handle-disposition part) 'filename)
														 (mail-content-type-get
															(mm-handle-type part) 'name)))
							 (extra (read-string (concat filename ": ")))
							 (new-filename (concat (plist-get talk :file-prefix)
																		 extra "." (file-name-extension filename))))
					(mm-save-part-to-file
					 part (expand-file-name new-filename emacsconf-cache-dir))
					(mm-save-part-to-file
					 part (expand-file-name new-filename (expand-file-name "cache" emacsconf-res-dir)))
					(mm-save-part-to-file
					 part (expand-file-name new-filename emacsconf-backstage-dir)))))
		(mm-dissect-buffer))))

(provide 'emacsconf-mail)
;;; emacsconf-mail.el ends here