X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=lib%2Fmessage.cc;h=a7a13cc26aa181ec94f336048385403b903d4d37;hp=e6a5a5af9651d207b01ca755e6adbba700fc0a85;hb=bc9c50602d20ce712188ea2cc3c5d30647d4d3f5;hpb=df8885f62c13f77b2b16cbb211e3a727945870b0

diff --git a/lib/message.cc b/lib/message.cc
index e6a5a5af..a7a13cc2 100644
--- a/lib/message.cc
+++ b/lib/message.cc
@@ -39,6 +39,9 @@ struct visible _notmuch_message {
     notmuch_message_file_t *message_file;
     notmuch_message_list_t *replies;
     unsigned long flags;
+    /* For flags that are initialized on-demand, lazy_flags indicates
+     * if each flag has been initialized. */
+    unsigned long lazy_flags;
 
     Xapian::Document doc;
     Xapian::termcount termpos;
@@ -99,6 +102,7 @@ _notmuch_message_create_for_document (const void *talloc_owner,
 
     message->frozen = 0;
     message->flags = 0;
+    message->lazy_flags = 0;
 
     /* Each of these will be lazily created as needed. */
     message->message_id = NULL;
@@ -192,15 +196,17 @@ _notmuch_message_create (const void *talloc_owner,
  *
  *     There is already a document with message ID 'message_id' in the
  *     database. The returned message can be used to query/modify the
- *     document.
+ *     document. The message may be a ghost message.
+ *
  *   NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND:
  *
  *     No document with 'message_id' exists in the database. The
  *     returned message contains a newly created document (not yet
  *     added to the database) and a document ID that is known not to
- *     exist in the database. The caller can modify the message, and a
- *     call to _notmuch_message_sync will add * the document to the
- *     database.
+ *     exist in the database.  This message is "blank"; that is, it
+ *     contains only a message ID and no other metadata. The caller
+ *     can modify the message, and a call to _notmuch_message_sync
+ *     will add the document to the database.
  *
  * If an error occurs, this function will return NULL and *status
  * will be set as appropriate. (The status pointer argument must
@@ -224,6 +230,10 @@ _notmuch_message_create_for_message_id (notmuch_database_t *notmuch,
     else if (*status_ret)
 	return NULL;
 
+    /* If the message ID is too long, substitute its sha1 instead. */
+    if (strlen (message_id) > NOTMUCH_MESSAGE_ID_MAX)
+	message_id = _notmuch_message_id_compressed (message, message_id);
+
     term = talloc_asprintf (NULL, "%s%s",
 			    _find_prefix ("id"), message_id);
     if (term == NULL) {
@@ -299,6 +309,7 @@ _notmuch_message_ensure_metadata (notmuch_message_t *message)
     const char *thread_prefix = _find_prefix ("thread"),
 	*tag_prefix = _find_prefix ("tag"),
 	*id_prefix = _find_prefix ("id"),
+	*type_prefix = _find_prefix ("type"),
 	*filename_prefix = _find_prefix ("file-direntry"),
 	*replyto_prefix = _find_prefix ("replyto");
 
@@ -331,10 +342,25 @@ _notmuch_message_ensure_metadata (notmuch_message_t *message)
 	message->message_id =
 	    _notmuch_message_get_term (message, i, end, id_prefix);
 
+    /* Get document type */
+    assert (strcmp (id_prefix, type_prefix) < 0);
+    if (! NOTMUCH_TEST_BIT (message->lazy_flags, NOTMUCH_MESSAGE_FLAG_GHOST)) {
+	i.skip_to (type_prefix);
+	/* "T" is the prefix "type" fields.  See
+	 * BOOLEAN_PREFIX_INTERNAL. */
+	if (*i == "Tmail")
+	    NOTMUCH_CLEAR_BIT (&message->flags, NOTMUCH_MESSAGE_FLAG_GHOST);
+	else if (*i == "Tghost")
+	    NOTMUCH_SET_BIT (&message->flags, NOTMUCH_MESSAGE_FLAG_GHOST);
+	else
+	    INTERNAL_ERROR ("Message without type term");
+	NOTMUCH_SET_BIT (&message->lazy_flags, NOTMUCH_MESSAGE_FLAG_GHOST);
+    }
+
     /* Get filename list.  Here we get only the terms.  We lazily
      * expand them to full file names when needed in
      * _notmuch_message_ensure_filename_list. */
-    assert (strcmp (id_prefix, filename_prefix) < 0);
+    assert (strcmp (type_prefix, filename_prefix) < 0);
     if (!message->filename_term_list && !message->filename_list)
 	message->filename_term_list =
 	    _notmuch_database_get_terms_with_prefix (message, i, end,
@@ -365,6 +391,11 @@ _notmuch_message_invalidate_metadata (notmuch_message_t *message,
 	message->tag_list = NULL;
     }
 
+    if (strcmp ("type", prefix_name) == 0) {
+	NOTMUCH_CLEAR_BIT (&message->flags, NOTMUCH_MESSAGE_FLAG_GHOST);
+	NOTMUCH_CLEAR_BIT (&message->lazy_flags, NOTMUCH_MESSAGE_FLAG_GHOST);
+    }
+
     if (strcmp ("file-direntry", prefix_name) == 0) {
 	talloc_free (message->filename_term_list);
 	talloc_free (message->filename_list);
@@ -412,26 +443,35 @@ _notmuch_message_ensure_message_file (notmuch_message_t *message)
 const char *
 notmuch_message_get_header (notmuch_message_t *message, const char *header)
 {
-    try {
-	    std::string value;
-
-	    /* Fetch header from the appropriate xapian value field if
-	     * available */
-	    if (strcasecmp (header, "from") == 0)
-		value = message->doc.get_value (NOTMUCH_VALUE_FROM);
-	    else if (strcasecmp (header, "subject") == 0)
-		value = message->doc.get_value (NOTMUCH_VALUE_SUBJECT);
-	    else if (strcasecmp (header, "message-id") == 0)
-		value = message->doc.get_value (NOTMUCH_VALUE_MESSAGE_ID);
-
-	    if (!value.empty())
+    Xapian::valueno slot = Xapian::BAD_VALUENO;
+
+    /* Fetch header from the appropriate xapian value field if
+     * available */
+    if (strcasecmp (header, "from") == 0)
+	slot = NOTMUCH_VALUE_FROM;
+    else if (strcasecmp (header, "subject") == 0)
+	slot = NOTMUCH_VALUE_SUBJECT;
+    else if (strcasecmp (header, "message-id") == 0)
+	slot = NOTMUCH_VALUE_MESSAGE_ID;
+
+    if (slot != Xapian::BAD_VALUENO) {
+	try {
+	    std::string value = message->doc.get_value (slot);
+
+	    /* If we have NOTMUCH_FEATURE_FROM_SUBJECT_ID_VALUES, then
+	     * empty values indicate empty headers.  If we don't, then
+	     * it could just mean we didn't record the header. */
+	    if ((message->notmuch->features &
+		 NOTMUCH_FEATURE_FROM_SUBJECT_ID_VALUES) ||
+		! value.empty())
 		return talloc_strdup (message, value.c_str ());
 
-    } catch (Xapian::Error &error) {
-	fprintf (stderr, "A Xapian exception occurred when reading header: %s\n",
-		 error.get_msg().c_str());
-	message->notmuch->exception_reported = TRUE;
-	return NULL;
+	} catch (Xapian::Error &error) {
+	    fprintf (stderr, "A Xapian exception occurred when reading header: %s\n",
+		     error.get_msg().c_str());
+	    message->notmuch->exception_reported = TRUE;
+	    return NULL;
+	}
     }
 
     /* Otherwise fall back to parsing the file */
@@ -644,6 +684,10 @@ _notmuch_message_add_filename (notmuch_message_t *message,
     if (filename == NULL)
 	INTERNAL_ERROR ("Message filename cannot be NULL.");
 
+    if (! (message->notmuch->features & NOTMUCH_FEATURE_FILE_TERMS) ||
+	! (message->notmuch->features & NOTMUCH_FEATURE_BOOL_FOLDER))
+	return NOTMUCH_STATUS_UPGRADE_REQUIRED;
+
     relative = _notmuch_database_relative_path (message->notmuch, filename);
 
     status = _notmuch_database_split_path (local, relative, &directory, NULL);
@@ -688,6 +732,10 @@ _notmuch_message_remove_filename (notmuch_message_t *message,
     notmuch_private_status_t private_status;
     notmuch_status_t status;
 
+    if (! (message->notmuch->features & NOTMUCH_FEATURE_FILE_TERMS) ||
+	! (message->notmuch->features & NOTMUCH_FEATURE_BOOL_FOLDER))
+	return NOTMUCH_STATUS_UPGRADE_REQUIRED;
+
     status = _notmuch_database_filename_to_direntry (
 	local, message->notmuch, filename, NOTMUCH_FIND_LOOKUP, &direntry);
     if (status || !direntry)
@@ -846,7 +894,11 @@ notmuch_bool_t
 notmuch_message_get_flag (notmuch_message_t *message,
 			  notmuch_message_flag_t flag)
 {
-    return message->flags & (1 << flag);
+    if (flag == NOTMUCH_MESSAGE_FLAG_GHOST &&
+	! NOTMUCH_TEST_BIT (message->lazy_flags, flag))
+	_notmuch_message_ensure_metadata (message);
+
+    return NOTMUCH_TEST_BIT (message->flags, flag);
 }
 
 void
@@ -854,9 +906,10 @@ notmuch_message_set_flag (notmuch_message_t *message,
 			  notmuch_message_flag_t flag, notmuch_bool_t enable)
 {
     if (enable)
-	message->flags |= (1 << flag);
+	NOTMUCH_SET_BIT (&message->flags, flag);
     else
-	message->flags &= ~(1 << flag);
+	NOTMUCH_CLEAR_BIT (&message->flags, flag);
+    NOTMUCH_SET_BIT (&message->lazy_flags, flag);
 }
 
 time_t
@@ -873,6 +926,9 @@ notmuch_message_get_date (notmuch_message_t *message)
 	return 0;
     }
 
+    if (value.empty ())
+	/* sortable_unserialise is undefined on empty string */
+	return 0;
     return Xapian::sortable_unserialise (value);
 }
 
@@ -963,6 +1019,24 @@ _notmuch_message_delete (notmuch_message_t *message)
     return NOTMUCH_STATUS_SUCCESS;
 }
 
+/* Transform a blank message into a ghost message.  The caller must
+ * _notmuch_message_sync the message. */
+notmuch_private_status_t
+_notmuch_message_initialize_ghost (notmuch_message_t *message,
+				   const char *thread_id)
+{
+    notmuch_private_status_t status;
+
+    status = _notmuch_message_add_term (message, "type", "ghost");
+    if (status)
+	return status;
+    status = _notmuch_message_add_term (message, "thread", thread_id);
+    if (status)
+	return status;
+
+    return NOTMUCH_PRIVATE_STATUS_SUCCESS;
+}
+
 /* Ensure that 'message' is not holding any file object open. Future
  * calls to various functions will still automatically open the
  * message file as needed.
@@ -1032,6 +1106,8 @@ _notmuch_message_gen_terms (notmuch_message_t *message,
 	/* Create a gap between this an the next terms so they don't
 	 * appear to be a phrase. */
 	message->termpos = term_gen->get_termpos () + 100;
+
+	_notmuch_message_invalidate_metadata (message, prefix_name);
     }
 
     term_gen->set_termpos (message->termpos);
@@ -1476,7 +1552,7 @@ notmuch_message_tags_to_maildir_flags (notmuch_message_t *message)
     talloc_free (to_set);
     talloc_free (to_clear);
 
-    return NOTMUCH_STATUS_SUCCESS;
+    return status;
 }
 
 notmuch_status_t