[PATCH v2 5/5] emacs: Use message-citation-line-format in reply

[Adam Wolfe Gordon <awg+notmuch@xvx.ca>]

Instead of using a static citation line for the first line of the
reply message, use the customizable one defined by message-mode.
This makes it easy for users to customize the reply style, and
retains consistency for users with existing message-mode
customizations.

The test has been updated to reflect how the message will be
formatted with the default value of message-citation-line-format.

---
 emacs/notmuch-mua.el |   19 ++++++++++++++++---
 test/emacs           |    2 +-
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/emacs/notmuch-mua.el b/emacs/notmuch-mua.el
index 64e160a..b58f919 100644
--- a/emacs/notmuch-mua.el
+++ b/emacs/notmuch-mua.el
@@ -135,9 +135,22 @@ list."
 	  (forward-line -1)
 	(goto-char (point-max)))
 
-      (insert (format "On %s, %s wrote:\n"
-		      (cdr (assq 'date original-headers))
-		      (cdr (assq 'from original-headers))))
+      (let* ((quoth message-citation-line-format)
+	     (case-fold-search nil)
+	     (full-from (cdr (assq 'from original-headers)))
+	     (from-addr (car (mail-header-parse-address full-from)))
+	     (from-name (cdr (mail-header-parse-address full-from)))
+	     (first-name (car (split-string from-name)))
+	     (last-name (append (cdr (split-string from-name))))
+	     (time (date-to-time (cdr (assq 'date original-headers)))))
+
+	(setq quoth (replace-regexp-in-string "%f" full-from quoth t t))
+	(setq quoth (replace-regexp-in-string "%n" from-addr quoth t t))
+	(setq quoth (replace-regexp-in-string "%N" from-name quoth t t))
+	(setq quoth (replace-regexp-in-string "%F" first-name quoth t t))
+	(setq quoth (replace-regexp-in-string "%L" last-name quoth t t))
+	(setq quoth (format-time-string quoth time))
+	(insert quoth))
 
       (if plain-parts
 	  (mapc (lambda (part) (notmuch-mua-insert-part-quoted part)) plain-parts)
diff --git a/test/emacs b/test/emacs
index ac47b16..3f59b23 100755
--- a/test/emacs
+++ b/test/emacs
@@ -268,7 +268,7 @@ Subject: Re: Testing message sent via SMTP
 In-Reply-To: <XXX>
 Fcc: $(pwd)/mail/sent
 --text follows this line--
-On 01 Jan 2000 12:00:00 -0000, Notmuch Test Suite <test_suite@notmuchmail.org> wrote:
+On Sat, Jan 01 2000, Notmuch Test Suite wrote:
 > This is a test that messages are sent via SMTP
 EOF
 test_expect_equal_file OUTPUT EXPECTED
-- 
1.7.5.4