* don't save drafts immediately, and do the post-sending stuff not in hooks,

but rather by a special 'sent-' message handler

emacs/mu4e-main.el

@@ -53,24 +53,14 @@
   "Keymap for the *mu4e-main* buffer.")
 (fset 'mu4e-main-mode-map mu4e-main-mode-map)
 
-(defun mu4e-main-mode ()
+(define-derived-mode mu4e-main-mode special-mode "mu4e:main"
   "Major mode for the mu4e main screen.
-
 \\{mu4e-main-mode-map}."
-  (interactive)
-
-  (kill-all-local-variables)
   (use-local-map mu4e-main-mode-map)
-
   (setq
-    major-mode 'mu4e-main-mode
-    mode-name "mu4e-main"
     truncate-lines t
-    buffer-read-only t
     overwrite-mode 'overwrite-mode-binary))
 
-(put 'mu4e-main-mode 'mode-class 'special)
-
 
 (defun mu4e-action-str (str &optional func-or-shortcut)
   "Highlight the first occurence of [..] in STR. If

emacs/mu4e-send.el

@@ -282,15 +282,9 @@ use the new docid. Returns the full path to the new message."
 		 (new     (mu4e-send-create-new))
 		 (t (error "unsupported compose-type %S" compose-type)))))
     (when str
-      (with-temp-file draft
+      (with-current-buffer (find-file-noselect draft)
-	(insert str)
+	(insert str)))
-	(write-file draft)))
+    draft)) ;; return the draft buffer file
-
-    ;; save our file immediately, add add it to the db; thus, we can retrieve
-    ;; the new docid from `mu4e-path-docid-map'.
-    (mu4e-proc-add draft mu4e-drafts-folder)
-    draft))
-
 
 (defun mu4e-send-compose-handler (compose-type &optional original-msg includes)
   "Create a new draft message, or open an existing one.
@@ -330,9 +324,6 @@ using Gnus' `message-mode'."
 	      (plist-get original-msg :path)
 	      (error "unsupported compose-type %S" compose-type)))))
 
-    (unless (file-readable-p draft)
-      (error "Cannot read %s" draft))
-
     (find-file draft)
     (message-mode)
 
@@ -344,15 +335,21 @@ using Gnus' `message-mode'."
 	(mml-attach-file
 	  (plist-get att :file-name) (plist-get att :mime-type))))
 
-    (make-local-variable 'write-file-functions)
+    (make-local-variable 'after-save-hook)
 
     ;; update the db when the file is saved...]
-    (add-to-list 'write-file-functions
+    (add-hook 'after-save-hook
       (lambda() (mu4e-proc-add (buffer-file-name) mu4e-drafts-folder)))
 
-    ;; hook our functions up with sending of the message
+    ;; notify the backend that a message has been sent. The backend will respond
-    (add-hook 'message-sent-hook 'mu4e-send-save-copy-maybe nil t)
+    ;; with (:sent ...) sexp, which is handled in .
-    (add-hook 'message-sent-hook 'mu4e-send-set-parent-flag nil t)
+    (add-hook 'message-sent-hook
+      (lambda ()
+	(mu4e-proc-sent (buffer-file-name) mu4e-drafts-folder)))
+
+    ;; register the function; this function will be called when the '(:sent...)'
+    ;; message is received (see mu4e-proc.el) with parameters docid and path
+    (setq mu4e-proc-sent-func 'mu4e-sent-handler)
 
     (let ((message-hidden-headers
 	    `("^References:" "^Face:" "^X-Face:" "^X-Draft-From:"
@@ -365,18 +362,27 @@ using Gnus' `message-mode'."
 
 
 
-(defun mu4e-send-save-copy-maybe ()
+(defun mu4e-sent-handler (docid path)
-  "If `mu4e-save-sent-messages-behavior' is a symbol 'delete, move
+  "Handler function, called with DOCID and PATH for the just-sent
- the message in this buffer to the sent folder. Otherwise, delete
+message."
- the draft message.  This is meant to be called from message mode's
+  ;; for Forward ('Passed') and Replied messages, try to set the appropriate
- `message-sent-hook'."
+  ;; flag at the message forwarded or replied-to
-  (let ((docid (gethash (buffer-file-name) mu4e-path-docid-map)))
+  (mu4e-send-set-parent-flag docid path)
-    (unless docid (error "unknown message (%S)" (buffer-file-name)))
+  ;; handle the draft -- should it be moved to the send folder, or elsewhere?
+  (mu4e-send-save-copy-maybe docid path))
+
+
+(defun mu4e-send-save-copy-maybe (docid path)
+  "Handler function, called with DOCID and PATH for the just-sent
+message."
+  ;; first, what to do with the draft message in PATH?
+  (with-current-buffer (find-file-noselect path)
     (if (eq mu4e-sent-messages-behavior 'delete)
       (progn
 	(save-buffer)
 	(mu4e-proc-remove-msg docid)) ;; remove it
-      (progn ;; try to save the message the sent folder
+      ;; otherwise,
+      (progn ;; prepare the message for saving
 	(save-excursion
 	  (goto-char (point-min))
 	  ;; remove the --text follows this line-- separator
@@ -390,10 +396,9 @@ using Gnus' `message-mode'."
 	    (mu4e-proc-move-msg docid mu4e-sent-folder  "-T-D+S")))))))
 
 
-
+(defun mu4e-send-set-parent-flag (docid path)
-(defun mu4e-send-set-parent-flag ()
+  "Set the 'replied' \"R\" flag on messages we replied to, and the
-  "Set the 'replied' flag on messages we replied to, and the
+'passed' \"F\" flag on message we have forwarded.
-'passed' flag on message we have forwarded.
 
 If a message has a 'in-reply-to' header, it is considered a reply
 to the message with the corresponding message id. If it does not
@@ -404,10 +409,8 @@ corresponding with the /last/ message-id in the references header.
 Now, if the message has been determined to be either a forwarded
 message or a reply, we instruct the server to update that message
 with resp. the 'P' (passed) flag for a forwarded message, or the
-'R' flag for a replied message.
+'R' flag for a replied message."
-
+  (with-current-buffer (find-file-noselect path)
-This is meant to be called from message mode's
-`message-sent-hook'."
     (let ((in-reply-to (message-fetch-field "in-reply-to"))
 	   (forwarded-from)
 	   (references (message-fetch-field "references")))
@@ -425,6 +428,6 @@ This is meant to be called from message mode's
       (when (and in-reply-to (string-match "<\\(.*\\)>" in-reply-to))
 	(mu4e-proc-flag (match-string 1 in-reply-to) "+R"))
       (when (and forwarded-from (string-match "<\\(.*\\)>" forwarded-from))
-      (mu4e-proc-flag (match-string 1 forwarded-from) "+P"))))
+	(mu4e-proc-flag (match-string 1 forwarded-from) "+P")))))
 
 (provide 'mu4e-send)

man/mu-server.1

@@ -189,6 +189,22 @@ Using the \fBadd\fR command, we can add a message to the database.
 <- (:info add :path <path> :docid <docid>)
 .fi
 
+
+.TP
+.B sent
+
+With the \fBsent\fR command, we tell the backend that a message will be sent.
+
+.nf
+-> sent <path> <maildir>
+<- (:sent :path <path> :docid <docid>)
+.fi
+
+In the frontend, this message can then be used to trigger moving the message
+from the draft folder to the sent folder, setting the Replied/Passed flags on
+the parent messages.
+
+
 .TP
 .B mkdir
 

src/mu-cmd-server.c

@@ -170,6 +170,7 @@ enum _Cmd {
 	CMD_QUIT,
 	CMD_REMOVE,
 	CMD_SAVE,
+	CMD_SENT,
 	CMD_PING,
 	CMD_VIEW,
 
@@ -197,6 +198,7 @@ cmd_from_string (const char *str)
 		{ CMD_QUIT,	"quit"},
 		{ CMD_REMOVE,	"remove" },
 		{ CMD_SAVE,     "save"},
+		{ CMD_SENT,	"sent"},
 		{ CMD_PING,	"ping"},
 		{ CMD_VIEW,	"view"}
 	};
@@ -856,7 +858,7 @@ index_msg_cb (MuIndexStats *stats, void *user_data)
 	if (MU_CAUGHT_SIGNAL)
 		return MU_STOP;
 
-	if (stats->_processed % 500)
+	if (stats->_processed % 1000)
 		return MU_OK;
 
 	send_expr ("(:info index :status running "
@@ -867,14 +869,16 @@ index_msg_cb (MuIndexStats *stats, void *user_data)
 }
 
 static MuError
-cmd_add (MuStore *store, GSList *args, GError **err)
+cmd_add_or_sent (MuStore *store, Cmd add_or_sent, GSList *args, GError **err)
 {
 	unsigned docid;
 	const char *path, *maildir;
 	gchar *escpath;
 
+	g_return_val_if_fail (add_or_sent == CMD_ADD || add_or_sent == CMD_SENT,
+			      MU_ERROR_INTERNAL);
 	return_if_fail_param_num (args, 2, 2,
-				  "usage: add <path> <maildir>");
+				  "usage: add|sent <path> <maildir>");
 
 	path    = (const char*)args->data;
 	maildir = (const char*)g_slist_nth (args, 1)->data;
@@ -885,15 +889,20 @@ cmd_add (MuStore *store, GSList *args, GError **err)
 				     "failed to add path '%s'", path);
 
 	escpath = mu_str_escape_c_literal (path, TRUE);
-	send_expr ("(:info add :path %s :docid %u)", escpath, docid);
+
+	if (add_or_sent == CMD_ADD)
+		send_expr ("(:info add :path %s :docid %u)",
+			   escpath, docid);
+	else
+		send_expr ("(:sent t :path %s :docid %u)",
+			   escpath, docid);
+
 	g_free (escpath);
 
 	return MU_OK;
 }
 
 
-
-
 static MuError
 cmd_index (MuStore *store, GSList *args, GError **err)
 {
@@ -953,7 +962,8 @@ handle_command (Cmd cmd, MuStore *store, MuQuery *query, GSList *args,
 
 	switch (cmd) {
 
-	case CMD_ADD:		rv = cmd_add (store, args, err); break;
+	case CMD_ADD:		rv = cmd_add_or_sent (store, CMD_ADD,
+						      args, err); break;
 	case CMD_COMPOSE:	rv = cmd_compose (store, args, err); break;
 	case CMD_FIND:		rv = cmd_find (store, query, args, err); break;
 	case CMD_FLAG:		rv = cmd_flag (store, query, args, err); break;
@@ -964,6 +974,8 @@ handle_command (Cmd cmd, MuStore *store, MuQuery *query, GSList *args,
 	case CMD_QUIT:		rv = cmd_quit (args, err); break;
 	case CMD_REMOVE:	rv = cmd_remove (store, args, err); break;
 	case CMD_SAVE:		rv = cmd_save  (store, args, err); break;
+	case CMD_SENT:		rv = cmd_add_or_sent  (store, CMD_SENT,
+						       args, err); break;
 	case CMD_PING:		rv = cmd_ping (store, args, err); break;
 	case CMD_VIEW:		rv = cmd_view (store, query, args, err); break;