Initial cut for local provider, to handle mh/mailbox/maildir at

	least.
	Checking in to make a backup.

svn path=/trunk/; revision=6575

1 files changed, 637 insertions, 0 deletions

diff --git a/camel/providers/local/camel-local-folder.c b/camel/providers/local/camel-local-folder.c
new file mode 100644
index 0000000000..034f91d7ee
--- /dev/null
+++ b/camel/providers/local/camel-local-folder.c
@@ -0,0 +1,637 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; fill-column: 160 -*- */
+/* camel-local-folder.c : Abstract class for an email folder */
+
+/* 
+ * Authors: Michael Zucchi <notzed@helixcode.com>
+ *
+ * Copyright (C) 1999, 2000 Helix Code Inc.
+ *
+ * This program is free software; you can redistribute it and/or 
+ * modify it under the terms of the GNU General Public License as 
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+
+#include "camel-local-folder.h"
+#include "camel-local-store.h"
+#include "string-utils.h"
+#include "camel-stream-fs.h"
+#include "camel-local-summary.h"
+#include "camel-data-wrapper.h"
+#include "camel-mime-message.h"
+#include "camel-stream-filter.h"
+#include "camel-mime-filter-from.h"
+#include "camel-exception.h"
+
+#define d(x) (printf("%s(%d): ", __FILE__, __LINE__),(x))
+
+static CamelFolderClass *parent_class = NULL;
+
+/* Returns the class for a CamelLocalFolder */
+#define CLOCALF_CLASS(so) CAMEL_LOCAL_FOLDER_CLASS (CAMEL_OBJECT_GET_CLASS(so))
+#define CF_CLASS(so) CAMEL_FOLDER_CLASS (CAMEL_OBJECT_GET_CLASS(so))
+#define CLOCALS_CLASS(so) CAMEL_STORE_CLASS (CAMEL_OBJECT_GET_CLASS(so))
+
+
+static void local_sync(CamelFolder *folder, gboolean expunge, CamelException *ex);
+static gint local_get_message_count(CamelFolder *folder);
+static gint local_get_unread_message_count(CamelFolder *folder);
+
+static GPtrArray *local_get_uids(CamelFolder *folder);
+static GPtrArray *local_get_summary(CamelFolder *folder);
+#if 0
+static void local_append_message(CamelFolder *folder, CamelMimeMessage * message, const CamelMessageInfo * info, CamelException *ex);
+static CamelMimeMessage *local_get_message(CamelFolder *folder, const gchar * uid, CamelException *ex);
+#endif
+static void local_expunge(CamelFolder *folder, CamelException *ex);
+
+static const CamelMessageInfo *local_get_message_info(CamelFolder *folder, const char *uid);
+
+static GPtrArray *local_search_by_expression(CamelFolder *folder, const char *expression, CamelException *ex);
+static void local_search_free(CamelFolder *folder, GPtrArray * result);
+
+static guint32 local_get_message_flags(CamelFolder *folder, const char *uid);
+static void local_set_message_flags(CamelFolder *folder, const char *uid, guint32 flags, guint32 set);
+static gboolean local_get_message_user_flag(CamelFolder *folder, const char *uid, const char *name);
+static void local_set_message_user_flag(CamelFolder *folder, const char *uid, const char *name, gboolean value);
+static const char *local_get_message_user_tag(CamelFolder *folder, const char *uid, const char *name);
+static void local_set_message_user_tag(CamelFolder *folder, const char *uid, const char *name, const char *value);
+
+
+static void local_finalize(CamelObject * object);
+
+static void
+camel_local_folder_class_init(CamelLocalFolderClass * camel_local_folder_class)
+{
+	CamelFolderClass *camel_folder_class = CAMEL_FOLDER_CLASS(camel_local_folder_class);
+
+	parent_class = CAMEL_FOLDER_CLASS(camel_type_get_global_classfuncs(camel_folder_get_type()));
+
+	/* virtual method definition */
+
+	/* virtual method overload */
+	camel_folder_class->sync = local_sync;
+	camel_folder_class->get_message_count = local_get_message_count;
+	camel_folder_class->get_unread_message_count = local_get_unread_message_count;
+	camel_folder_class->get_uids = local_get_uids;
+	camel_folder_class->free_uids = camel_folder_free_deep;
+	camel_folder_class->get_summary = local_get_summary;
+	camel_folder_class->free_summary = camel_folder_free_nop;
+	camel_folder_class->expunge = local_expunge;
+
+	camel_folder_class->search_by_expression = local_search_by_expression;
+	camel_folder_class->search_free = local_search_free;
+
+	camel_folder_class->get_message_info = local_get_message_info;
+
+	camel_folder_class->get_message_flags = local_get_message_flags;
+	camel_folder_class->set_message_flags = local_set_message_flags;
+	camel_folder_class->get_message_user_flag = local_get_message_user_flag;
+	camel_folder_class->set_message_user_flag = local_set_message_user_flag;
+	camel_folder_class->get_message_user_tag = local_get_message_user_tag;
+	camel_folder_class->set_message_user_tag = local_set_message_user_tag;
+}
+
+static void
+local_init(gpointer object, gpointer klass)
+{
+	CamelFolder *folder = object;
+	CamelLocalFolder *local_folder = object;
+
+	folder->has_summary_capability = TRUE;
+	folder->has_search_capability = TRUE;
+
+	folder->permanent_flags = CAMEL_MESSAGE_ANSWERED |
+	    CAMEL_MESSAGE_DELETED | CAMEL_MESSAGE_DRAFT |
+	    CAMEL_MESSAGE_FLAGGED | CAMEL_MESSAGE_SEEN | CAMEL_MESSAGE_USER;
+
+	local_folder->summary = NULL;
+	local_folder->search = NULL;
+}
+
+static void
+local_finalize(CamelObject * object)
+{
+	CamelLocalFolder *local_folder = CAMEL_LOCAL_FOLDER(object);
+
+	if (local_folder->index)
+		ibex_close(local_folder->index);
+
+	g_free(local_folder->base_path);
+	g_free(local_folder->folder_path);
+	g_free(local_folder->summary_path);
+	g_free(local_folder->index_path);
+
+	camel_folder_change_info_free(local_folder->changes);
+}
+
+CamelType camel_local_folder_get_type(void)
+{
+	static CamelType camel_local_folder_type = CAMEL_INVALID_TYPE;
+
+	if (camel_local_folder_type == CAMEL_INVALID_TYPE) {
+		camel_local_folder_type = camel_type_register(CAMEL_FOLDER_TYPE, "CamelLocalFolder",
+							     sizeof(CamelLocalFolder),
+							     sizeof(CamelLocalFolderClass),
+							     (CamelObjectClassInitFunc) camel_local_folder_class_init,
+							     NULL,
+							     (CamelObjectInitFunc) local_init,
+							     (CamelObjectFinalizeFunc) local_finalize);
+	}
+
+	return camel_local_folder_type;
+}
+
+CamelLocalFolder *
+camel_local_folder_construct(CamelLocalFolder *lf, CamelStore *parent_store, const char *full_name, guint32 flags, CamelException *ex)
+{
+	CamelFolder *folder;
+	const char *root_dir_path, *name;
+	struct stat st;
+	int forceindex;
+
+	folder = (CamelFolder *)lf;
+
+	name = strrchr(full_name, '/');
+	if (name)
+		name++;
+	else
+		name = full_name;
+
+	camel_folder_construct(folder, parent_store, full_name, name);
+
+	root_dir_path = camel_local_store_get_toplevel_dir(CAMEL_LOCAL_STORE(folder->parent_store));
+
+	lf->base_path = g_strdup(root_dir_path);
+	lf->folder_path = g_strdup_printf("%s/%s", root_dir_path, full_name);
+	lf->summary_path = g_strdup_printf("%s/%s.ev-summary", root_dir_path, full_name);
+	lf->index_path = g_strdup_printf("%s/%s.ibex", root_dir_path, full_name);
+
+	lf->changes = camel_folder_change_info_new();
+
+	/* if we have no index file, force it */
+	forceindex = stat(lf->index_path, &st) == -1;
+	if (flags & CAMEL_STORE_FOLDER_BODY_INDEX) {
+
+		lf->index = ibex_open(lf->index_path, O_CREAT | O_RDWR, 0600);
+		if (lf->index == NULL) {
+			/* yes, this isn't fatal at all */
+			g_warning("Could not open/create index file: %s: indexing not performed", strerror(errno));
+			forceindex = FALSE;
+			/* record that we dont have an index afterall */
+			flags &= ~CAMEL_STORE_FOLDER_BODY_INDEX;
+		}
+	} else {
+		/* if we do have an index file, remove it */
+		if (forceindex == FALSE) {
+			unlink(lf->index_path);
+		}
+		forceindex = FALSE;
+	}
+
+	lf->flags = flags;
+
+	lf->summary = CLOCALF_CLASS(lf)->create_summary(lf->summary_path, lf->folder_path, lf->index);
+	if (camel_local_summary_load(lf->summary, forceindex, ex) == -1) {
+		camel_object_unref (CAMEL_OBJECT (folder));
+		return NULL;
+	}
+
+	return lf;
+}
+
+/* Have to work out how/when to lock */
+int camel_local_folder_lock(CamelLocalFolder *lf, CamelException *ex)
+{
+	return 0;
+}
+
+int camel_local_folder_unlock(CamelLocalFolder *lf, CamelException *ex)
+{
+	return 0;
+}
+
+static void
+local_sync(CamelFolder *folder, gboolean expunge, CamelException *ex)
+{
+	CamelLocalFolder *lf = CAMEL_LOCAL_FOLDER(folder);
+
+	d(printf("local sync, expunge=%s\n", expunge?"true":"false"));
+
+	if (camel_local_folder_lock(lf, ex) == -1)
+		return;
+
+	camel_local_summary_sync(lf->summary, expunge, lf->changes, ex);
+	if (camel_folder_change_info_changed(lf->changes)) {
+		camel_object_trigger_event(CAMEL_OBJECT(folder), "folder_changed", lf->changes);
+		camel_folder_change_info_clear(lf->changes);
+	}
+
+	if (camel_local_folder_unlock(lf, ex) == -1)
+		return;
+
+	/* force save of metadata */
+	if (lf->index)
+		ibex_save(lf->index);
+	if (lf->summary)
+		camel_folder_summary_save(CAMEL_FOLDER_SUMMARY(lf->summary));
+}
+
+static void
+local_expunge(CamelFolder *folder, CamelException *ex)
+{
+	d(printf("expunge\n"));
+
+	/* Just do a sync with expunge, serves the same purpose */
+	camel_folder_sync(folder, TRUE, ex);
+}
+
+#if 0
+static void
+local_append_message(CamelFolder *folder, CamelMimeMessage * message, const CamelMessageInfo * info, CamelException *ex)
+{
+	CamelLocalFolder *local_folder = CAMEL_LOCAL_FOLDER(folder);
+	CamelStream *output_stream = NULL, *filter_stream = NULL;
+	CamelMimeFilter *filter_from = NULL;
+	CamelMessageInfo *newinfo;
+	struct stat st;
+	off_t seek = -1;
+	char *xev;
+	guint32 uid;
+	char *fromline = NULL;
+
+	if (stat(local_folder->folder_path, &st) != 0)
+		goto fail;
+
+	output_stream = camel_stream_fs_new_with_name(local_folder->folder_file_path, O_WRONLY|O_APPEND, 0600);
+	if (output_stream == NULL)
+		goto fail;
+
+	seek = st.st_size;
+
+	/* assign a new x-evolution header/uid */
+	camel_medium_remove_header(CAMEL_MEDIUM(message), "X-Evolution");
+	uid = camel_folder_summary_next_uid(CAMEL_FOLDER_SUMMARY(local_folder->summary));
+	/* important that the header matches exactly 00000000-0000 */
+	xev = g_strdup_printf("%08x-%04x", uid, info ? info->flags & 0xFFFF : 0);
+	camel_medium_add_header(CAMEL_MEDIUM(message), "X-Evolution", xev);
+	g_free(xev);
+
+	/* we must write this to the non-filtered stream ... */
+	fromline = camel_local_summary_build_from(CAMEL_MIME_PART(message)->headers);
+	if (camel_stream_printf(output_stream, seek==0?"%s":"\n%s", fromline) == -1)
+		goto fail;
+
+	/* and write the content to the filtering stream, that translated '\nFrom' into '\n>From' */
+	filter_stream = (CamelStream *) camel_stream_filter_new_with_stream(output_stream);
+	filter_from = (CamelMimeFilter *) camel_mime_filter_from_new();
+	camel_stream_filter_add((CamelStreamFilter *) filter_stream, filter_from);
+	if (camel_data_wrapper_write_to_stream(CAMEL_DATA_WRAPPER(message), filter_stream) == -1)
+		goto fail;
+
+	if (camel_stream_close(filter_stream) == -1)
+		goto fail;
+
+	/* filter stream ref's the output stream itself, so we need to unref it too */
+	camel_object_unref(CAMEL_OBJECT(filter_from));
+	camel_object_unref(CAMEL_OBJECT(filter_stream));
+	camel_object_unref(CAMEL_OBJECT(output_stream));
+	g_free(fromline);
+
+	/* force a summary update - will only update from the new position, if it can */
+	if (camel_local_summary_update(local_folder->summary, seek==0?seek:seek+1, local_folder->changes) == 0) {
+		char uidstr[16];
+
+		sprintf(uidstr, "%u", uid);
+		newinfo = camel_folder_summary_uid(CAMEL_FOLDER_SUMMARY(local_folder->summary), uidstr);
+
+		if (info && newinfo) {
+			CamelFlag *flag = info->user_flags;
+			CamelTag *tag = info->user_tags;
+
+			while (flag) {
+				camel_flag_set(&(newinfo->user_flags), flag->name, TRUE);
+				flag = flag->next;
+			}
+
+			while (tag) {
+				camel_tag_set(&(newinfo->user_tags), tag->name, tag->value);
+				tag = tag->next;
+			}
+		}
+		camel_object_trigger_event(CAMEL_OBJECT(folder), "folder_changed", local_folder->changes);
+		camel_folder_change_info_clear(local_folder->changes);
+	}
+
+	return;
+
+      fail:
+	if (camel_exception_is_set(ex)) {
+		camel_exception_setv(ex, camel_exception_get_id(ex),
+				     _("Cannot append message to local file: %s"), camel_exception_get_description(ex));
+	} else {
+		camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
+				     _("Cannot append message to local file: %s"), g_strerror(errno));
+	}
+	if (filter_stream) {
+		/*camel_stream_close (filter_stream); */
+		camel_object_unref(CAMEL_OBJECT(filter_stream));
+	}
+	if (output_stream)
+		camel_object_unref(CAMEL_OBJECT(output_stream));
+
+	if (filter_from)
+		camel_object_unref(CAMEL_OBJECT(filter_from));
+
+	g_free(fromline);
+
+	/* make sure the file isn't munged by us */
+	if (seek != -1) {
+		int fd = open(local_folder->folder_file_path, O_WRONLY, 0600);
+
+		if (fd != -1) {
+			ftruncate(fd, st.st_size);
+			close(fd);
+		}
+	}
+}
+
+static CamelMimeMessage *
+local_get_message(CamelFolder *folder, const gchar * uid, CamelException *ex)
+{
+	CamelLocalFolder *local_folder = CAMEL_LOCAL_FOLDER(folder);
+	CamelStream *message_stream = NULL;
+	CamelMimeMessage *message = NULL;
+	CamelLocalMessageInfo *info;
+	CamelMimeParser *parser = NULL;
+	char *buffer;
+	int len;
+
+	/* get the message summary info */
+	info = (CamelLocalMessageInfo *) camel_folder_summary_uid(CAMEL_FOLDER_SUMMARY(local_folder->summary), uid);
+
+	if (info == NULL) {
+		errno = ENOENT;
+		goto fail;
+	}
+
+	/* if this has no content, its an error in the library */
+	g_assert(info->info.content);
+	g_assert(info->frompos != -1);
+
+	/* where we read from */
+	message_stream = camel_stream_fs_new_with_name(local_folder->folder_file_path, O_RDONLY, 0);
+	if (message_stream == NULL)
+		goto fail;
+
+	/* we use a parser to verify the message is correct, and in the correct position */
+	parser = camel_mime_parser_new();
+	camel_mime_parser_init_with_stream(parser, message_stream);
+	camel_object_unref(CAMEL_OBJECT(message_stream));
+	camel_mime_parser_scan_from(parser, TRUE);
+
+	camel_mime_parser_seek(parser, info->frompos, SEEK_SET);
+	if (camel_mime_parser_step(parser, &buffer, &len) != HSCAN_FROM) {
+		g_warning("File appears truncated");
+		goto fail;
+	}
+
+	if (camel_mime_parser_tell_start_from(parser) != info->frompos) {
+		/* TODO: This should probably perform a re-sync/etc, and try again? */
+		g_warning("Summary doesn't match the folder contents!  eek!\n"
+			  "  expecting offset %ld got %ld", (long int)info->frompos,
+			  (long int)camel_mime_parser_tell_start_from(parser));
+		errno = EINVAL;
+		goto fail;
+	}
+
+	message = camel_mime_message_new();
+	if (camel_mime_part_construct_from_parser(CAMEL_MIME_PART(message), parser) == -1) {
+		g_warning("Construction failed");
+		goto fail;
+	}
+	camel_object_unref(CAMEL_OBJECT(parser));
+
+	return message;
+
+      fail:
+	camel_exception_setv(ex, CAMEL_EXCEPTION_FOLDER_INVALID_UID, _("Cannot get message: %s"), g_strerror(errno));
+
+	if (parser)
+		camel_object_unref(CAMEL_OBJECT(parser));
+	if (message)
+		camel_object_unref(CAMEL_OBJECT(message));
+
+	return NULL;
+}
+#endif
+
+/*
+  The following functions all work off the summary, so the default operations provided
+  in camel-local-folder will suffice for all subclasses.  They may want to
+  snoop various operations to ensure the status remains synced, or just wait
+  for the sync operation
+*/
+static gint
+local_get_message_count(CamelFolder *folder)
+{
+	CamelLocalFolder *local_folder = CAMEL_LOCAL_FOLDER(folder);
+
+	g_return_val_if_fail(local_folder->summary != NULL, -1);
+
+	return camel_folder_summary_count(CAMEL_FOLDER_SUMMARY(local_folder->summary));
+}
+
+static gint
+local_get_unread_message_count(CamelFolder *folder)
+{
+	CamelLocalFolder *local_folder = CAMEL_LOCAL_FOLDER(folder);
+	CamelMessageInfo *info;
+	GPtrArray *infolist;
+	gint i, max, count = 0;
+
+	g_return_val_if_fail(local_folder->summary != NULL, -1);
+
+	max = camel_folder_summary_count(CAMEL_FOLDER_SUMMARY(local_folder->summary));
+	if (max == -1)
+		return -1;
+
+	infolist = local_get_summary(folder);
+
+	for (i = 0; i < infolist->len; i++) {
+		info = (CamelMessageInfo *) g_ptr_array_index(infolist, i);
+		if (!(info->flags & CAMEL_MESSAGE_SEEN))
+			count++;
+	}
+
+	return count;
+}
+
+static GPtrArray *
+local_get_uids(CamelFolder *folder)
+{
+	GPtrArray *array;
+	CamelLocalFolder *local_folder = CAMEL_LOCAL_FOLDER(folder);
+	int i, count;
+
+	count = camel_folder_summary_count(CAMEL_FOLDER_SUMMARY(local_folder->summary));
+	array = g_ptr_array_new();
+	g_ptr_array_set_size(array, count);
+	for (i = 0; i < count; i++) {
+		CamelMessageInfo *info = camel_folder_summary_index(CAMEL_FOLDER_SUMMARY(local_folder->summary), i);
+
+		array->pdata[i] = g_strdup(info->uid);
+	}
+
+	return array;
+}
+
+GPtrArray *
+local_get_summary(CamelFolder *folder)
+{
+	CamelLocalFolder *local_folder = CAMEL_LOCAL_FOLDER(folder);
+
+	return CAMEL_FOLDER_SUMMARY(local_folder->summary)->messages;
+}
+
+/* get a single message info, by uid */
+static const CamelMessageInfo *
+local_get_message_info(CamelFolder *folder, const char *uid)
+{
+	CamelLocalFolder *local_folder = CAMEL_LOCAL_FOLDER(folder);
+
+	return camel_folder_summary_uid(CAMEL_FOLDER_SUMMARY(local_folder->summary), uid);
+}
+
+static GPtrArray *
+local_search_by_expression(CamelFolder *folder, const char *expression, CamelException *ex)
+{
+	CamelLocalFolder *local_folder = CAMEL_LOCAL_FOLDER(folder);
+
+	if (local_folder->search == NULL) {
+		local_folder->search = camel_folder_search_new();
+	}
+
+	camel_folder_search_set_folder(local_folder->search, folder);
+	if (local_folder->summary) {
+		/* FIXME: dont access summary array directly? */
+		camel_folder_search_set_summary(local_folder->search,
+						CAMEL_FOLDER_SUMMARY(local_folder->summary)->messages);
+	}
+
+	camel_folder_search_set_body_index(local_folder->search, local_folder->index);
+
+	return camel_folder_search_execute_expression(local_folder->search, expression, ex);
+}
+
+static void
+local_search_free(CamelFolder *folder, GPtrArray * result)
+{
+	CamelLocalFolder *local_folder = CAMEL_LOCAL_FOLDER(folder);
+
+	camel_folder_search_free_result(local_folder->search, result);
+}
+
+static guint32
+local_get_message_flags(CamelFolder *folder, const char *uid)
+{
+	CamelMessageInfo *info;
+	CamelLocalFolder *mf = CAMEL_LOCAL_FOLDER(folder);
+
+	info = camel_folder_summary_uid(CAMEL_FOLDER_SUMMARY(mf->summary), uid);
+	g_return_val_if_fail(info != NULL, 0);
+
+	return info->flags;
+}
+
+static void
+local_set_message_flags(CamelFolder *folder, const char *uid, guint32 flags, guint32 set)
+{
+	CamelMessageInfo *info;
+	CamelLocalFolder *mf = CAMEL_LOCAL_FOLDER(folder);
+
+	info = camel_folder_summary_uid(CAMEL_FOLDER_SUMMARY(mf->summary), uid);
+	g_return_if_fail(info != NULL);
+
+	info->flags = (info->flags & ~flags) | (set & flags) | CAMEL_MESSAGE_FOLDER_FLAGGED;
+	camel_folder_summary_touch(CAMEL_FOLDER_SUMMARY(mf->summary));
+
+	camel_object_trigger_event(CAMEL_OBJECT(folder), "message_changed", (char *) uid);
+}
+
+static gboolean
+local_get_message_user_flag(CamelFolder *folder, const char *uid, const char *name)
+{
+	CamelMessageInfo *info;
+	CamelLocalFolder *mf = CAMEL_LOCAL_FOLDER(folder);
+
+	info = camel_folder_summary_uid(CAMEL_FOLDER_SUMMARY(mf->summary), uid);
+	g_return_val_if_fail(info != NULL, FALSE);
+
+	return camel_flag_get(&info->user_flags, name);
+}
+
+static void
+local_set_message_user_flag(CamelFolder *folder, const char *uid, const char *name, gboolean value)
+{
+	CamelMessageInfo *info;
+	CamelLocalFolder *mf = CAMEL_LOCAL_FOLDER(folder);
+
+	info = camel_folder_summary_uid(CAMEL_FOLDER_SUMMARY(mf->summary), uid);
+	g_return_if_fail(info != NULL);
+
+	camel_flag_set(&info->user_flags, name, value);
+	info->flags |= CAMEL_MESSAGE_FOLDER_FLAGGED;
+	camel_folder_summary_touch(CAMEL_FOLDER_SUMMARY(mf->summary));
+	camel_object_trigger_event(CAMEL_OBJECT(folder), "message_changed", (char *) uid);
+}
+
+static const char *
+local_get_message_user_tag(CamelFolder *folder, const char *uid, const char *name)
+{
+	CamelMessageInfo *info;
+	CamelLocalFolder *mf = CAMEL_LOCAL_FOLDER(folder);
+
+	info = camel_folder_summary_uid(CAMEL_FOLDER_SUMMARY(mf->summary), uid);
+	g_return_val_if_fail(info != NULL, FALSE);
+
+	return camel_tag_get(&info->user_tags, name);
+}
+
+static void
+local_set_message_user_tag(CamelFolder *folder, const char *uid, const char *name, const char *value)
+{
+	CamelMessageInfo *info;
+	CamelLocalFolder *mf = CAMEL_LOCAL_FOLDER(folder);
+
+	info = camel_folder_summary_uid(CAMEL_FOLDER_SUMMARY(mf->summary), uid);
+	g_return_if_fail(info != NULL);
+
+	camel_tag_set(&info->user_tags, name, value);
+	info->flags |= CAMEL_MESSAGE_FOLDER_FLAGGED;
+	camel_folder_summary_touch(CAMEL_FOLDER_SUMMARY(mf->summary));
+	camel_object_trigger_event(CAMEL_OBJECT(folder), "message_changed", (char *) uid);
+}
+
+