From 96da1c622caac904e3f60e306847a4e68ca15e0c Mon Sep 17 00:00:00 2001
From: Kyle Meyer <kyle@kyleam.com>
Date: Sun, 3 Jan 2021 06:34:39 +0000
Subject: Decode more message headers

piem-extract-mbox-info feeds the "from" header value through
rfc2047-decode-string, but the same treatment should be applied to
other header values.

Message-Id: <20210103063425.22718-1-kyle@kyleam.com>
---
 piem-gnus.el |  7 +++++--
 piem.el      | 25 +++++++++++++------------
 2 files changed, 18 insertions(+), 14 deletions(-)

diff --git a/piem-gnus.el b/piem-gnus.el
index dd0234c..c6b9d0c 100644
--- a/piem-gnus.el
+++ b/piem-gnus.el
@@ -31,6 +31,7 @@
 (require 'gnus-sum)
 (require 'message)
 (require 'piem)
+(require 'rfc2047)
 
 (defgroup piem-gnus nil
   "Gnus integration for piem."
@@ -85,8 +86,10 @@ message itself if it looks like a patch."
       (when-let ((patch (with-current-buffer gnus-article-buffer
                           (save-restriction
                             (widen)
-                            (and (string-match-p piem-patch-subject-re
-                                                 (message-field-value "subject"))
+                            (and (string-match-p
+                                  piem-patch-subject-re
+                                  (rfc2047-decode-string
+                                   (message-field-value "subject")))
                                  (buffer-substring-no-properties
                                   (point-min) (point-max)))))))
         (cons (lambda () (insert patch))
diff --git a/piem.el b/piem.el
index b9df925..bf79813 100644
--- a/piem.el
+++ b/piem.el
@@ -302,17 +302,22 @@ non-nil, make the match specific for that message."
                               (one-or-more (not (any "/" "\n")))))))
          string-end)))
 
+(defun piem--message-fetch-decoded-fields (headers)
+  (save-excursion
+    (save-restriction
+      (message-narrow-to-head)
+      (mapcar (lambda (header)
+                (when-let ((val (message-fetch-field header)))
+                  (rfc2047-decode-string val)))
+              headers))))
+
 (defun piem-inbox-by-header-match ()
   "Return inbox based on matching message headers.
 This should be called from a buffer containing a message and is
 intended to be used by libraries implementing a function for
 `piem-get-mid-functions'."
   (pcase-let ((`(,listid ,to ,cc)
-               (save-restriction
-                 (message-narrow-to-head)
-                 (list (message-fetch-field "list-id")
-                       (message-fetch-field "to")
-                       (message-fetch-field "cc")))))
+               (piem--message-fetch-decoded-fields '("list-id" "to" "cc"))))
     (catch 'hit
       (dolist (inbox piem-inboxes)
         (let* ((info (cdr inbox))
@@ -582,13 +587,9 @@ attachment file name, if any."
 If BUFFER is nil, the current buffer is used.  Any message after
 the first will be ignored."
   (with-current-buffer (or buffer (current-buffer))
-    (let ((info (save-excursion
-                  (save-restriction
-                    (message-narrow-to-head)
-                    (list :date (message-fetch-field "date")
-                          :from (when-let ((from (message-fetch-field "from")))
-                                  (rfc2047-decode-string from))
-                          :subject (message-fetch-field "subject"))))))
+    (let ((info (cl-mapcan #'list '(:date :from :subject)
+                           (piem--message-fetch-decoded-fields
+                            '("date" "from" "subject")))))
       (when (re-search-forward (rx line-start "base-commit: "
                                    (group (>= 40 hex-digit))
                                    line-end)
-- 
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