lib: refactor notmuch_database_add_message header parsing

This function is large and hard to understand and modify. Start to
break it down into meaningful pieces.

1 files changed, 4 insertions, 50 deletions

diff --git a/lib/add-message.cc b/lib/add-message.cc
index 314016a8..2922eaa9 100644
--- a/lib/add-message.cc
+++ b/lib/add-message.cc
@@ -468,7 +468,7 @@ notmuch_database_add_message (notmuch_database_t *notmuch,
     notmuch_private_status_t private_status;
     notmuch_bool_t is_ghost = FALSE, is_new = FALSE;
 
-    const char *date, *header;
+    const char *date;
     const char *from, *to, *subject;
     char *message_id = NULL;
 
@@ -489,57 +489,12 @@ notmuch_database_add_message (notmuch_database_t *notmuch,
     if (ret)
 	goto DONE;
 
-    /* Parse message up front to get better error status. */
-    ret = _notmuch_message_file_parse (message_file);
+    ret = _notmuch_message_file_get_headers (message_file,
+					     &from, &subject, &to, &date,
+					     &message_id);
     if (ret)
 	goto DONE;
 
-    /* Before we do any real work, (especially before doing a
-     * potential SHA-1 computation on the entire file's contents),
-     * let's make sure that what we're looking at looks like an
-     * actual email message.
-     */
-    from = _notmuch_message_file_get_header (message_file, "from");
-    subject = _notmuch_message_file_get_header (message_file, "subject");
-    to = _notmuch_message_file_get_header (message_file, "to");
-
-    if ((from == NULL || *from == '\0') &&
-	(subject == NULL || *subject == '\0') &&
-	(to == NULL || *to == '\0')) {
-	ret = NOTMUCH_STATUS_FILE_NOT_EMAIL;
-	goto DONE;
-    }
-
-    /* Now that we're sure it's mail, the first order of business
-     * is to find a message ID (or else create one ourselves).
-     */
-    header = _notmuch_message_file_get_header (message_file, "message-id");
-    if (header && *header != '\0') {
-	message_id = _parse_message_id (message_file, header, NULL);
-
-	/* So the header value isn't RFC-compliant, but it's
-	 * better than no message-id at all.
-	 */
-	if (message_id == NULL)
-	    message_id = talloc_strdup (message_file, header);
-    }
-
-    if (message_id == NULL ) {
-	/* No message-id at all, let's generate one by taking a
-	 * hash over the file's contents.
-	 */
-	char *sha1 = _notmuch_sha1_of_file (filename);
-
-	/* If that failed too, something is really wrong. Give up. */
-	if (sha1 == NULL) {
-	    ret = NOTMUCH_STATUS_FILE_ERROR;
-	    goto DONE;
-	}
-
-	message_id = talloc_asprintf (message_file, "notmuch-sha1-%s", sha1);
-	free (sha1);
-    }
-
     try {
 	/* Now that we have a message ID, we get a message object,
 	 * (which may or may not reference an existing document in the
@@ -579,7 +534,6 @@ notmuch_database_add_message (notmuch_database_t *notmuch,
 	    if (ret)
 		goto DONE;
 
-	    date = _notmuch_message_file_get_header (message_file, "date");
 	    _notmuch_message_set_header_values (message, date, from, subject);
 
 	    ret = _notmuch_message_index_file (message, message_file);