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(require 'mu4e)
(require 'org-mu4e)
(require 'mu4e-contrib)

(setq shr-color-visible-luminance-min 30)

(setq mu4e-get-mail-command "offlineimap"
      mu4e-compose-signature-auto-include nil
      mu4e-compose-dont-reply-to-self t
      mu4e-update-interval 60
      mu4e-headers-include-related t)

(setq mu4e-use-fancy-chars t)
(setq mu4e-headers-seen-mark    '("" . ""))
(setq mu4e-headers-unread-mark  '("u" . "✉"))

;; Don't update list of emails automatically.  I update the list
;; manually with "g".
(setq mu4e-headers-auto-update nil)

(setq mu4e-view-show-addresses t)
(setq mu4e-hide-index-messages t)
(setq mu4e-html2text-command 'mu4e-shr2text)
(setq mu4e-view-show-images t)

(defun my/mu4e-trash-folder (msg)
  "Do not copy mails across maildirs to trash them."
  (let ((dir (and msg
                  (mu4e-message-field-raw msg :maildir))))
    (cond
     ((not dir) "/private/Trash")
     ((string-prefix-p "/mdc-personal" dir)
      "/mdc-personal/Deleted Items")
     (t (let ((prefix (cadr (split-string dir "/"))))
          (concat "/" prefix "/Trash"))))))

(defun my/mu4e-refile-folder (msg)
  "Do not copy mails across maildirs to archive them."
  (let ((dir (and msg
                  (mu4e-message-field-raw msg :maildir))))
    (cond
     ((not dir) "/private/Archives")
     ((string-prefix-p "/mdc-personal" dir)
      "/mdc-personal/Archive")
     (t (let ((prefix (cadr (split-string dir "/"))))
          (concat "/" prefix "/Archives"))))))

;; use imagemagick, if available
(when (fboundp 'imagemagick-register-types)
  (imagemagick-register-types))

(setq mu4e-maildir        "~/Mail"
      mu4e-attachment-dir "~/Downloads"
      mu4e-sent-folder    "/private/Sent"
      mu4e-drafts-folder  "/private/Drafts"
      mu4e-trash-folder   'my/mu4e-trash-folder
      mu4e-refile-folder  'my/mu4e-refile-folder
      user-mail-address   (rot13 "erxnqb@ryrcuyl.arg"))

(defvar my-mu4e-account-alist
  `(("mdc-personal"
     (user-mail-address  ,(rot13 "evpneqb.jhezhf@zqp-oreyva.qr"))
     (user-full-name     ,(rot13 "Evpneqb Jhezhf"))
     (mu4e-sent-folder   "/mdc-personal/Sent Items")
     (mu4e-drafts-folder "/mdc-personal/Drafts"))
    ("private"
     (user-mail-address  ,(rot13 "erxnqb@ryrcuyl.arg"))
     (user-full-name     ,(rot13 "Evpneqb Jhezhf"))
     (mu4e-sent-folder   "/private/Sent")
     (mu4e-drafts-folder "/private/Drafts"))
    ("fhaindojo"
     (user-mail-address  ,(rot13 "erxnqb@sunva.pbqreqbwb.oreyva"))
     (user-full-name     ,(rot13 "Evpneqb Jhezhf"))
     (mu4e-sent-folder   "/fhaindojo/Sent")
     (mu4e-drafts-folder "/fhaindojo/Drafts"))))

(setq mu4e-user-mail-address-list
      (mapcar (lambda (account) (cadr (assq 'user-mail-address account)))
              my-mu4e-account-alist))

(defun my-mu4e-set-account ()
  "Set the account for composing a message."
  (let* ((account
          (if mu4e-compose-parent-message
              (let ((maildir (mu4e-message-field mu4e-compose-parent-message :maildir)))
                (string-match "/\\(.*?\\)/" maildir)
                (match-string 1 maildir))
            (completing-read (format "Compose with account: (%s) "
                                     (mapconcat #'(lambda (var) (car var))
                                                my-mu4e-account-alist "/"))
                             (mapcar #'(lambda (var) (car var)) my-mu4e-account-alist)
                             nil t nil nil (caar my-mu4e-account-alist))))
         (account-vars (cdr (assoc account my-mu4e-account-alist))))
    (if account-vars
        (mapc #'(lambda (var)
                  (set (car var) (cadr var)))
              account-vars)
      (error "No email account found"))))

(add-hook 'mu4e-compose-pre-hook 'my-mu4e-set-account)

;; pretty quotes!
(add-hook 'message-mode-hook
          (lambda ()
            (require 'typo)
            (typo-mode 1)))

(let ((guix     "(list:guix-devel@gnu.org OR list:bug-guix@gnu.org OR list:help-guix@gnu.org OR list:guix-sysadmin@gnu.org OR list:guix-security.gnu.org)")
      (guile    "(list:guile-user@gnu.org OR list:guile-devel@gnu.org OR list:bug-guile@gnu.org)")
      (emacs    "(list:emacs-devel@gnu.org)")
      (security "(list:oss-security@lists.openwall.com)")
      (lilypond "(list:lilypond-devel@gnu.org)")
      (eoma     "(list:arm-netbook@lists.phcomp.co.uk)")
      (fsfe     "(subject:\"Willkommen in der FSFE\" list:berlin-bounces@lists.fsfe.org OR list:berlin-owner@lists.fsfe.org OR list:coordinators@lists.fsfe.org OR list:berlin@lists.fsfe.org OR list:newsletter-en@fsfeurope.org OR list:newsletter-de@fsfeurope.org)")
      (dojo     "(list:coderdojo-berlin-discussion@googlegroups.com OR to:hello@fhain.coderdojo.berlin)")
      (unread   "(flag:unread AND NOT flag:trashed)")
      (me       "(body:rekado OR body:Ricardo)"))
  (setq mu4e-bookmarks
        (list
         ;; TODO: don't match my own signature
         (list (concat me " " unread)
               "Mentioning me (unread)" ?R)
         (list "maildir:\"/private/INBOX\""
               "Personal inbox"  ?i)
         (list "date:today..now"
               "Today's messages" ?t)
         (list "date:today..now"
               "Last 7 days" ?w)
         (list (concat "maildir:\"/private/INBOX\"" " " unread)
               "Unread messages (private)"  ?u)
         (list (concat guix " " unread)
               "Guix"  ?1)
         (list (concat guile " " unread)
               "Guile"  ?2)
         (list (concat lilypond " " unread)
               "Lilypond"  ?3)
         (list (concat fsfe " " unread)
               "FSFE"  ?4)
         (list (concat dojo " " unread)
               "CoderDojo"  ?5)
         (list (concat eoma " " unread)
               "EOMA68"  ?6)
         (list (concat emacs " " unread)
               "Emacs"  ?7)
         (list (concat security " " unread)
               "Security" ?8)
         (list (concat "maildir:\"/private/mailinglists\""
                       " " unread
                       " NOT " guix
                       " NOT " guile
                       " NOT " lilypond
                       " NOT " fsfe
                       " NOT " eoma
                       " NOT " emacs
                       " NOT " security
                       " NOT " dojo)
               "Unread list messages"  ?m)
         (list "maildir:\"/private/INBOX\" flag:flagged"
               "Flagged (private)"  ?f)
         (list "maildir:\"/mdc-personal/INBOX\" flag:flagged"
               "Flagged (work)"  ?g))))

; set up email sending with msmtp
(setq mail-user-agent 'mu4e-user-agent)
(setq mail-specify-envelope-from t)
(setq mail-envelope-from 'header)

(setq message-kill-buffer-on-exit t)
(setq message-sendmail-envelope-from 'header)
(setq message-send-mail-function 'message-send-mail-with-sendmail)

;;use msmtp instead of sendmail
(setq sendmail-program "~/.guix-profile/bin/msmtp")

(global-set-key (kbd "<f12>") 'mu4e)

;; Crypto
(setq mml2015-encrypt-to-self t)
(setq mml2015-sign-with-sender t)

(add-hook 'mu4e-compose-mode-hook
  (defun my/maybe-reply-encrypted ()
    "Encrypt automatically if parent message was also encrypted."
    (let ((msg mu4e-compose-parent-message))
      (when (and msg (member 'encrypted (mu4e-message-field msg :flags)))
        (mml-secure-message-sign-encrypt)))))

(add-hook 'mu4e-view-mode-hook
  (defun my/maybe-decrypt-inline ()
    "Attempt to decrypt inline PGP messages automatically."
    (save-excursion
      (goto-char (point-min))
      (re-search-forward "-----BEGIN PGP MESSAGE-----$" nil t)
      (let ((armor-start (match-beginning 0)))
        (when armor-start
          (let ((armor-end (re-search-forward "^-----END PGP MESSAGE-----$" nil t)))
            (when armor-end
              ;; Don't ask if I want to replace the text.  Just do it.
              (flet ((yes-or-no-p (&rest args) t)
                     (y-or-n-p (&rest args) t))
                (epa-decrypt-armor-in-region armor-start armor-end)))))))))

(require 'mu4e-actions)
(add-to-list 'mu4e-view-actions
             '("git am" . mu4e-action-git-apply-mbox))
(add-to-list 'mu4e-headers-actions
             '("git am" . mu4e-action-git-apply-mbox))