From d3a0857a8fc110893bbb3cdf14489603c4dad23d Mon Sep 17 00:00:00 2001
From: Kyle Meyer <kyle@kyleam.com>
Date: Sat, 6 Jun 2020 21:04:48 -0400
Subject: Copy over some Maildir utilities from Notmuch

These will be used for writing messages from a public-inbox t.mbox.gz
into a Maildir directory.
---
 Makefile        |  3 ++-
 piem-maildir.el | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+), 1 deletion(-)
 create mode 100644 piem-maildir.el

diff --git a/Makefile b/Makefile
index bf09fae..2bcf8eb 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@ EMACS   = emacs
 BATCH   = $(EMACS) --batch -Q -L .
 
 EL = piem.el piem-b4.el piem-elfeed.el piem-eww.el piem-gnus.el \
-     piem-notmuch.el
+     piem-maildir.el piem-notmuch.el
 ELC = $(EL:.el=.elc)
 
 all: compile piem.info piem-autoloads.el
@@ -23,6 +23,7 @@ piem-b4.elc: piem-b4.el piem.elc
 piem-elfeed.elc: piem-elfeed.el piem.elc
 piem-eww.elc: piem-eww.el piem.elc
 piem-gnus.elc: piem-gnus.el piem.elc
+piem-maildir.elc: piem-maildir.el
 piem-notmuch.elc: piem-notmuch.el piem.elc
 piem.elc: piem.el
 
diff --git a/piem-maildir.el b/piem-maildir.el
new file mode 100644
index 0000000..8819f33
--- /dev/null
+++ b/piem-maildir.el
@@ -0,0 +1,63 @@
+;;; piem-maildir.el --- Maildir helpers for piem     -*- lexical-binding: t; -*-
+
+;; This file is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published
+;; by the Free Software Foundation; either version 2, or (at your
+;; option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Commentary:
+
+;; This file extracts parts of Notmuch's emacs/notmuch-maildir-fcc.el
+;; (ed40579ad3882e6f9bbe9b1ba5e707ab289ca203), simply replacing
+;; "notmuch-maildir-fcc-" with "piem-maildir-".  No other
+;; modifications have been made.  The copyright notice above matches
+;; what is in the original file.
+
+;;; Code:
+
+(defvar piem-maildir-count 0)
+
+(defun piem-maildir-host-fixer (hostname)
+  (replace-regexp-in-string "/\\|:"
+                            (lambda (s)
+                              (cond ((string-equal s "/") "\\057")
+                                    ((string-equal s ":") "\\072")
+                                    (t s)))
+                            hostname
+                            t
+                            t))
+
+(defun piem-maildir-make-uniq-maildir-id ()
+   (let* ((ftime (float-time))
+          (microseconds (mod (* 1000000 ftime) 1000000))
+          (hostname (piem-maildir-host-fixer (system-name))))
+     (setq piem-maildir-count (+ piem-maildir-count 1))
+     (format "%d.%d_%d_%d.%s"
+             ftime
+             (emacs-pid)
+             microseconds
+             piem-maildir-count
+             hostname)))
+
+(defun piem-maildir-dir-is-maildir-p (dir)
+  (and (file-exists-p (concat dir "/cur/"))
+       (file-exists-p (concat dir "/new/"))
+       (file-exists-p (concat dir "/tmp/"))))
+
+(defun piem-maildir-move-tmp-to-new (destdir msg-id)
+  (add-name-to-file
+   (concat destdir "/tmp/" msg-id)
+   (concat destdir "/new/" msg-id ":2,")))
+
+(provide 'piem-maildir)
+;;; piem-maildir.el ends here
-- 
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