Remove the CONF_DEFAULT_PATH entry, as this is handled by the url config

2002-06-04  Not Zed  <NotZed@Ximian.com>

        * providers/local/camel-local-provider.c: Remove the
        CONF_DEFAULT_PATH entry, as this is handled by the url config
        stuff.  This made it basically impossible to configure any local
        folder from the gui.

        * providers/local/camel-local-folder.c (local_refresh_info): Force
        a refresh.  Should work for all local folders to force them to
        refresh.

        * providers/local/camel-maildir-folder.c (maildir_refresh_info):
        Removed, moved into camel-local-folder.

        * providers/local/camel-mh-summary.c (mh_summary_next_uid_string):
        Once we assign or get a uid, tell the summary of this, so the next
        uid we get will be higher than any previously.

        * camel-object.c (camel_object_ref, camel_object_unref): I got
        sick of casting, these now take void * like they should, and
        perform their own run-time type checking.

        * providers/local/camel-mh-store.c (recursive_scan): Changed to
        use stat, not lstat (*shrug* maybe someone wants to softlink their
        maildir tree?).
        (inode_hash):
        (inode_equal):
        (inode_free): Copied from camel-maildir store (should put into
        camel-local-store or utils?).
        (recursive_scan): Changed to check for re-visiting inodes.  Also,
        it builds the tree itself, rather than using folder_info_build.
        (add_folder): Changed to folder_info_new.
        (recursive_scan): Properly honour the recursive flag.  Also,
        lookup unread count from folder.
        (folder_info_new): Init unread message count to -1, since we dont
        know yet.
        (folder_info_new): Take the name as an argument, and perform the
        merging here.
        (folders_update): Util func to add/remove folders from .folders
        file.  I'm assuming its sorted.
        (get_folder): Add the folder to .folders if we created a new one,
        and if it exists.
        (delete_folder): Remove from .folders, etc.
        (folders_scan): If we have a .folders file, read and use that
        instead.
        (recursive_scan): Handle scanning from a particular directory
        properly.
        (rename_folder): Implement so we can track any changes to the
        .folders file if its turned on.

        ** Applied patch below from Greg Hudson.

2002-05-10  Greg Hudson  <ghudson@mit.edu>

        * camel-mh-store.c (get_inbox, get_folder_info, recursive_scan,
        add_folder): Implement support for MH stores.

        * camel-mh-summary.c (mh_summary_check, sort_uid_cmp): Sort MH
        messages by message number (uid), like we sort maildir messages by
        date.

        * camel-local-provider.c (mh_provider): Turn on source and store
        flags.

svn path=/trunk/; revision=17130

camel/ChangeLog

@@ -1,3 +1,67 @@
+2002-06-04  Not Zed  <NotZed@Ximian.com>
+
+	* providers/local/camel-local-provider.c: Remove the
+	CONF_DEFAULT_PATH entry, as this is handled by the url config
+	stuff.  This made it basically impossible to configure any local
+	folder from the gui.
+
+	* providers/local/camel-local-folder.c (local_refresh_info): Force
+	a refresh.  Should work for all local folders to force them to
+	refresh.
+
+	* providers/local/camel-maildir-folder.c (maildir_refresh_info):
+	Removed, moved into camel-local-folder.
+
+	* providers/local/camel-mh-summary.c (mh_summary_next_uid_string):
+	Once we assign or get a uid, tell the summary of this, so the next
+	uid we get will be higher than any previously.
+
+	* camel-object.c (camel_object_ref, camel_object_unref): I got
+	sick of casting, these now take void * like they should, and
+	perform their own run-time type checking.
+
+	* providers/local/camel-mh-store.c (recursive_scan): Changed to
+	use stat, not lstat (*shrug* maybe someone wants to softlink their
+	maildir tree?).
+	(inode_hash):
+	(inode_equal):
+	(inode_free): Copied from camel-maildir store (should put into
+	camel-local-store or utils?).
+	(recursive_scan): Changed to check for re-visiting inodes.  Also,
+	it builds the tree itself, rather than using folder_info_build.
+	(add_folder): Changed to folder_info_new.
+	(recursive_scan): Properly honour the recursive flag.  Also,
+	lookup unread count from folder.
+	(folder_info_new): Init unread message count to -1, since we dont
+	know yet.
+	(folder_info_new): Take the name as an argument, and perform the
+	merging here.
+	(folders_update): Util func to add/remove folders from .folders
+	file.  I'm assuming its sorted.
+	(get_folder): Add the folder to .folders if we created a new one,
+	and if it exists.
+	(delete_folder): Remove from .folders, etc.
+	(folders_scan): If we have a .folders file, read and use that
+	instead.
+	(recursive_scan): Handle scanning from a particular directory
+	properly.
+	(rename_folder): Implement so we can track any changes to the
+	.folders file if its turned on.
+
+	** Applied patch below from Greg Hudson.
+	
+2002-05-10  Greg Hudson  <ghudson@mit.edu>
+
+	* camel-mh-store.c (get_inbox, get_folder_info, recursive_scan,
+	add_folder): Implement support for MH stores.
+
+	* camel-mh-summary.c (mh_summary_check, sort_uid_cmp): Sort MH
+	messages by message number (uid), like we sort maildir messages by
+	date.
+
+	* camel-local-provider.c (mh_provider): Turn on source and store
+	flags.
+
 2002-06-03  Not Zed  <NotZed@Ximian.com>
 
 	* camel-vee-folder.c (camel_vee_folder_add_folder):

camel/camel-object.c

@@ -409,17 +409,26 @@ camel_object_new(CamelType type)
 }
 
 void
-camel_object_ref(CamelObject *o)
+camel_object_ref(void *vo)
 {
+	register CamelObject *o = vo;
+
+	g_return_if_fail(CAMEL_IS_OBJECT(o));
+
 	CLASS_LOCK(o->klass);
 	o->ref_count++;
 	CLASS_UNLOCK(o->klass);
 }
 
 void
-camel_object_unref(CamelObject *o)
+camel_object_unref(void *vo)
 {
-	register CamelObjectClass *klass = o->klass, *k;
+	register CamelObject *o = vo;
+	register CamelObjectClass *klass, *k;
+
+	g_return_if_fail(CAMEL_IS_OBJECT(o));
+	
+	klass = o->klass;
 
 	CLASS_LOCK(klass);
 	o->ref_count--;

camel/camel-object.h

@@ -192,8 +192,8 @@ CamelType camel_object_get_type (void);
 CamelObject *camel_object_new (CamelType type);
 CamelObject *camel_object_new_name (const char *name);
 
-void camel_object_ref (CamelObject *obj);
-void camel_object_unref (CamelObject *obj);
+void camel_object_ref(void *);
+void camel_object_unref(void *);
 
 #ifdef CAMEL_DEBUG
 #define camel_object_ref(o) (printf("%s (%s:%d):ref (%p)\n", __FUNCTION__, __FILE__, __LINE__, o), camel_object_ref(o))

camel/camel-stream-buffer.c

@@ -170,6 +170,7 @@ CamelStream *
 camel_stream_buffer_new (CamelStream *stream, CamelStreamBufferMode mode)
 {
 	CamelStreamBuffer *sbf;
+
 	sbf = CAMEL_STREAM_BUFFER (camel_object_new (camel_stream_buffer_get_type ()));
 	CAMEL_STREAM_BUFFER_CLASS (CAMEL_OBJECT_GET_CLASS(sbf))->init (sbf, stream, mode);
 

camel/providers/local/camel-local-folder.c

@@ -70,6 +70,8 @@ static int local_getv(CamelObject *object, CamelException *ex, CamelArgGetV *arg
 static int local_lock(CamelLocalFolder *lf, CamelLockType type, CamelException *ex);
 static void local_unlock(CamelLocalFolder *lf);
 
+static void local_refresh_info(CamelFolder *folder, CamelException *ex);
+
 static void local_sync(CamelFolder *folder, gboolean expunge, CamelException *ex);
 static void local_expunge(CamelFolder *folder, CamelException *ex);
 
@@ -94,6 +96,7 @@ camel_local_folder_class_init(CamelLocalFolderClass * camel_local_folder_class)
 	/* virtual method overload */
 	oklass->getv = local_getv;
 
+	camel_folder_class->refresh_info = local_refresh_info;
 	camel_folder_class->sync = local_sync;
 	camel_folder_class->expunge = local_expunge;
 
@@ -371,6 +374,21 @@ local_unlock(CamelLocalFolder *lf)
 	/* nothing */
 }
 
+/* for auto-check to work */
+static void
+local_refresh_info(CamelFolder *folder, CamelException *ex)
+{
+	CamelLocalFolder *lf = (CamelLocalFolder *)folder;
+
+	if (camel_local_summary_check((CamelLocalSummary *)folder->summary, lf->changes, ex) == -1)
+		return;
+
+	if (camel_folder_change_info_changed(lf->changes)) {
+		camel_object_trigger_event((CamelObject *)folder, "folder_changed", lf->changes);
+		camel_folder_change_info_clear(lf->changes);
+	}
+}
+
 static void
 local_sync(CamelFolder *folder, gboolean expunge, CamelException *ex)
 {

camel/providers/local/camel-local-provider.c

@@ -40,6 +40,8 @@
 
 static CamelProviderConfEntry mh_conf_entries[] = {
 	CAMEL_PROVIDER_CONF_DEFAULT_PATH,
+	{ CAMEL_PROVIDER_CONF_CHECKBOX, "dotfolders", NULL,
+	  N_("Use the `.folders' folder summary file (exmh)"), "0" },
 	{ CAMEL_PROVIDER_CONF_END }
 };
 
@@ -48,7 +50,7 @@ static CamelProvider mh_provider = {
 	N_("MH-format mail directories"),
 	N_("For storing local mail in MH-like mail directories."),
 	"mail",
-	CAMEL_PROVIDER_IS_LOCAL,
+	CAMEL_PROVIDER_IS_SOURCE | CAMEL_PROVIDER_IS_STORAGE | CAMEL_PROVIDER_IS_LOCAL,
 	CAMEL_URL_NEED_PATH | CAMEL_URL_PATH_IS_ABSOLUTE,
 	mh_conf_entries,
 	/* ... */
@@ -118,7 +120,7 @@ static CamelProvider spoold_provider = {
 	"mail",
 	CAMEL_PROVIDER_IS_SOURCE | CAMEL_PROVIDER_IS_STORAGE | CAMEL_PROVIDER_IS_LOCAL,
 	CAMEL_URL_NEED_PATH | CAMEL_URL_PATH_IS_ABSOLUTE,
-	spoold_conf_entries,
+	NULL,
 	/* ... */
 };
 

camel/providers/local/camel-maildir-folder.c

@@ -54,7 +54,6 @@ static CamelLocalSummary *maildir_create_summary(const char *path, const char *f
 
 static void maildir_append_message(CamelFolder * folder, CamelMimeMessage * message, const CamelMessageInfo *info, char **appended_uid, CamelException * ex);
 static CamelMimeMessage *maildir_get_message(CamelFolder * folder, const gchar * uid, CamelException * ex);
-static void maildir_refresh_info(CamelFolder *folder, CamelException *ex);
 
 static void maildir_finalize(CamelObject * object);
 
@@ -68,7 +67,6 @@ static void camel_maildir_folder_class_init(CamelObjectClass * camel_maildir_fol
 	/* virtual method definition */
 
 	/* virtual method overload */
-	camel_folder_class->refresh_info = maildir_refresh_info;
 	camel_folder_class->append_message = maildir_append_message;
 	camel_folder_class->get_message = maildir_get_message;
 
@@ -127,20 +125,6 @@ static CamelLocalSummary *maildir_create_summary(const char *path, const char *f
 	return (CamelLocalSummary *)camel_maildir_summary_new(path, folder, index);
 }
 
-static void
-maildir_refresh_info(CamelFolder *folder, CamelException *ex)
-{
-	CamelLocalFolder *lf = (CamelLocalFolder *)folder;
-
-	if (camel_local_summary_check((CamelLocalSummary *)folder->summary, lf->changes, ex) == -1)
-		return;
-
-	if (camel_folder_change_info_changed(lf->changes)) {
-		camel_object_trigger_event((CamelObject *)folder, "folder_changed", lf->changes);
-		camel_folder_change_info_clear(lf->changes);
-	}
-}
-
 static void
 maildir_append_message (CamelFolder *folder, CamelMimeMessage *message, const CamelMessageInfo *info, char **appended_uid, CamelException *ex)
 {

camel/providers/local/camel-mh-store.c

@@ -27,32 +27,48 @@
 #include <errno.h>
 #include <string.h>
 #include <unistd.h>
+#include <dirent.h>
 
 #include "camel-mh-store.h"
 #include "camel-mh-folder.h"
 #include "camel-exception.h"
 #include "camel-url.h"
+#include "camel-private.h"
+
+#include <camel/camel-stream-fs.h>
+#include <camel/camel-stream-buffer.h>
 
 static CamelLocalStoreClass *parent_class = NULL;
 
+#define d(x)
+
 /* Returns the class for a CamelMhStore */
 #define CMHS_CLASS(so) CAMEL_MH_STORE_CLASS (CAMEL_OBJECT_GET_CLASS(so))
 #define CF_CLASS(so) CAMEL_FOLDER_CLASS (CAMEL_OBJECT_GET_CLASS(so))
 #define CMHF_CLASS(so) CAMEL_MH_FOLDER_CLASS (CAMEL_OBJECT_GET_CLASS(so))
 
+static void construct (CamelService *service, CamelSession *session, CamelProvider *provider, CamelURL *url, CamelException *ex);
 static CamelFolder *get_folder(CamelStore * store, const char *folder_name, guint32 flags, CamelException * ex);
+static CamelFolder *get_inbox (CamelStore *store, CamelException *ex);
 static void delete_folder(CamelStore * store, const char *folder_name, CamelException * ex);
+static void rename_folder(CamelStore *store, const char *old, const char *new, CamelException *ex);
+static CamelFolderInfo * get_folder_info (CamelStore *store, const char *top, guint32 flags, CamelException *ex);
 
 static void camel_mh_store_class_init(CamelObjectClass * camel_mh_store_class)
 {
 	CamelStoreClass *camel_store_class = CAMEL_STORE_CLASS(camel_mh_store_class);
-	/*CamelServiceClass *camel_service_class = CAMEL_SERVICE_CLASS(camel_mh_store_class);*/
+	CamelServiceClass *camel_service_class = CAMEL_SERVICE_CLASS(camel_mh_store_class);
 
 	parent_class = (CamelLocalStoreClass *)camel_type_get_global_classfuncs(camel_local_store_get_type());
 
 	/* virtual method overload, use defaults for most */
+	camel_service_class->construct = construct;
+
 	camel_store_class->get_folder = get_folder;
+	camel_store_class->get_inbox = get_inbox;
 	camel_store_class->delete_folder = delete_folder;
+	camel_store_class->rename_folder = rename_folder;
+	camel_store_class->get_folder_info = get_folder_info;
 }
 
 CamelType camel_mh_store_get_type(void)
@@ -72,6 +88,103 @@ CamelType camel_mh_store_get_type(void)
 	return camel_mh_store_type;
 }
 
+static void
+construct (CamelService *service, CamelSession *session, CamelProvider *provider, CamelURL *url, CamelException *ex)
+{
+	CamelMhStore *mh_store = (CamelMhStore *)service;
+
+	CAMEL_SERVICE_CLASS (parent_class)->construct (service, session, provider, url, ex);
+	if (camel_exception_is_set (ex))
+		return;
+
+	if (camel_url_get_param(url, "dotfolders"))
+		mh_store->flags |= CAMEL_MH_DOTFOLDERS;
+}
+
+enum {
+	UPDATE_NONE,
+	UPDATE_ADD,
+	UPDATE_REMOVE,
+};
+
+/* update the .folders file if it exists, or create it if it doesn't */
+static void
+folders_update(const char *root, const char *folder, int mode)
+{
+	char *tmp, *tmpnew, *line = NULL;
+	CamelStream *stream, *in = NULL, *out = NULL;
+
+	tmpnew = alloca(strlen(root)+16);
+	sprintf(tmpnew, "%s.folders~", root);
+	
+	out = camel_stream_fs_new_with_name(tmpnew, O_WRONLY|O_CREAT|O_TRUNC, 0666);
+	if (out == NULL)
+		goto fail;
+
+	tmp = alloca(strlen(root)+16);
+	sprintf(tmp, "%s.folders", root);
+	stream = camel_stream_fs_new_with_name(tmp, O_RDONLY, 0);
+	if (stream) {
+		in = camel_stream_buffer_new(stream, CAMEL_STREAM_BUFFER_READ);
+		camel_object_unref(stream);
+	}
+	if (in == NULL || stream == NULL) {
+		if (mode == UPDATE_ADD && camel_stream_printf(out, "%s\n", folder) == -1)
+			goto fail;
+		goto done;
+	}
+
+	while ((line = camel_stream_buffer_read_line((CamelStreamBuffer *)in))) {
+		int copy = TRUE;
+
+		switch (mode) {
+		case UPDATE_REMOVE:
+			if (strcmp(line, folder) == 0)
+				copy = FALSE;
+			break;
+		case UPDATE_ADD: {
+			int cmp = strcmp(line, folder);
+
+			if (cmp > 0) {
+				/* found insertion point */
+				if (camel_stream_printf(out, "%s\n", folder) == -1)
+					goto fail;
+				mode = UPDATE_NONE;
+			} else if (tmp == 0) {
+				/* already there */
+				mode = UPDATE_NONE;
+			}
+			break; }
+		case UPDATE_NONE:
+			break;
+		}
+
+		if (copy && camel_stream_printf(out, "%s\n", line) == -1)
+			goto fail;
+
+		g_free(line);
+		line = NULL;
+	}
+
+	/* add to end? */
+	if (mode == UPDATE_ADD && camel_stream_printf(out, "%s\n", folder) == -1)
+		goto fail;
+
+	if (camel_stream_close(out) == -1)
+		goto fail;
+
+done:
+	/* should we care if this fails?  I suppose so ... */
+	rename(tmpnew, tmp);
+fail:
+	unlink(tmpnew);		/* remove it if its there */
+	g_free(line);
+	if (in)
+		camel_object_unref(in);
+	if (out)
+		camel_object_unref(out);
+}
+
 static CamelFolder *get_folder(CamelStore * store, const char *folder_name, guint32 flags, CamelException * ex)
 {
 	char *name;
@@ -97,6 +210,7 @@ static CamelFolder *get_folder(CamelStore * store, const char *folder_name, guin
 			g_free (name);
 			return NULL;
 		}
+
 		if (mkdir(name, 0700) != 0) {
 			camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
 					     _("Could not create folder `%s':\n%s"),
@@ -104,6 +218,12 @@ static CamelFolder *get_folder(CamelStore * store, const char *folder_name, guin
 			g_free (name);
 			return NULL;
 		}
+
+		/* add to .folders if we are supposed to */
+		/* FIXME: throw exception on error */
+		if (((CamelMhStore *)store)->flags & CAMEL_MH_DOTFOLDERS)
+			folders_update(((CamelLocalStore *)store)->toplevel_dir, folder_name, UPDATE_ADD);
+
 	} else if (!S_ISDIR(st.st_mode)) {
 		camel_exception_setv(ex, CAMEL_EXCEPTION_STORE_NO_FOLDER,
 				     _("`%s' is not a directory."), name);
@@ -115,6 +235,12 @@ static CamelFolder *get_folder(CamelStore * store, const char *folder_name, guin
 	return camel_mh_folder_new(store, folder_name, flags, ex);
 }
 
+static CamelFolder *
+get_inbox (CamelStore *store, CamelException *ex)
+{
+	return get_folder (store, "inbox", 0, ex);
+}
+
 static void delete_folder(CamelStore * store, const char *folder_name, CamelException * ex)
 {
 	char *name;
@@ -130,6 +256,279 @@ static void delete_folder(CamelStore * store, const char *folder_name, CamelExce
 	}
 	g_free(name);
 
+	/* remove from .folders if we are supposed to */
+	if (((CamelMhStore *)store)->flags & CAMEL_MH_DOTFOLDERS)
+		folders_update(((CamelLocalStore *)store)->toplevel_dir, folder_name, UPDATE_REMOVE);
+
 	/* and remove metadata */
 	((CamelStoreClass *)parent_class)->delete_folder(store, folder_name, ex);
 }
+
+static void
+rename_folder(CamelStore *store, const char *old, const char *new, CamelException *ex)
+{
+	CamelException e;
+
+	camel_exception_init(&e);
+	((CamelStoreClass *)parent_class)->rename_folder(store, old, new, &e);
+	if (camel_exception_is_set(&e)) {
+		camel_exception_xfer(ex, &e);
+		return;
+	}
+	camel_exception_clear(&e);
+
+	if (((CamelMhStore *)store)->flags & CAMEL_MH_DOTFOLDERS) {
+		/* yeah this is messy, but so is mh! */
+		folders_update(((CamelLocalStore *)store)->toplevel_dir, new, UPDATE_ADD);
+		folders_update(((CamelLocalStore *)store)->toplevel_dir, old, UPDATE_REMOVE);
+	}
+}
+
+static CamelFolderInfo *folder_info_new(CamelStore *store, const char *root, const char *path)
+{
+	CamelFolderInfo *fi;
+	char *base;
+	CamelFolder *folder;
+
+	base = strrchr(path, '/');
+
+	/* Build the folder info structure. */
+	fi = g_malloc0(sizeof(*fi));
+	fi->url = g_strdup_printf("mh:%s#%s", root, path);
+	fi->full_name = g_strdup(path);
+	fi->name = g_strdup(base?base+1:path);
+	fi->unread_message_count = 0;
+
+	/* check unread count if open */
+	CAMEL_STORE_LOCK(store, cache_lock);
+	folder = g_hash_table_lookup(store->folders, path);
+	if (folder) {
+		if ((((CamelMhStore *)store)->flags & CAMEL_STORE_FOLDER_INFO_FAST) == 0)
+			camel_folder_refresh_info(folder, NULL);
+		fi->unread_message_count = camel_folder_get_unread_message_count(folder);
+	}
+	CAMEL_STORE_UNLOCK(store, cache_lock);
+
+	/* We could: if we have no folder, and FAST isn't specified, perform a full
+	   scan of all messages for their status flags.  But its probably not worth
+	   it as we need to read the top of every file, i.e. very very slow */
+
+	camel_folder_info_build_path(fi, '/');
+
+	d(printf("New folderinfo:\n '%s'\n '%s'\n '%s'\n", fi->full_name, fi->url, fi->path));
+
+	return fi;
+}
+
+/* used to find out where we've visited already */
+struct _inode {
+	dev_t dnode;
+	ino_t inode;
+};
+
+/* Scan path, under root, for directories to add folders for.  Both
+ * root and path should have a trailing "/" if they aren't empty. */
+static void recursive_scan(CamelStore *store, CamelFolderInfo **fip, CamelFolderInfo *parent, GHashTable *visited, const char *root, const char *path)
+{
+	char *fullpath, *tmp;
+	DIR *dp;
+	struct dirent *d;
+	struct stat st;
+	CamelFolderInfo *fi;
+	struct _inode in, *inew;
+
+	/* Open the specified directory. */
+	if (path[0]) {
+		fullpath = alloca(strlen(root)+strlen(path)+2);
+		sprintf(fullpath, "%s/%s", root, path);
+	} else 
+		fullpath = (char *)root;
+
+	if (stat(fullpath, &st) == -1 || !S_ISDIR(st.st_mode))
+		return;
+
+	in.dnode = st.st_dev;
+	in.inode = st.st_ino;
+
+	/* see if we've visited already */
+	if (g_hash_table_lookup(visited, &in) != NULL)
+		return;
+
+	inew = g_malloc(sizeof(*inew));
+	*inew = in;
+	g_hash_table_insert(visited, inew, inew);
+
+	/* link in ... */
+	fi = folder_info_new(store, root, path);
+	fi->parent = parent;
+	fi->sibling = *fip;
+	*fip = fi;
+
+	if ((( ((CamelMhStore *)store)->flags & CAMEL_STORE_FOLDER_INFO_RECURSIVE) || parent == NULL)) {
+		/* now check content for possible other directories */
+		dp = opendir(fullpath);
+		if (dp == NULL)
+			return;
+
+		/* Look for subdirectories to add and scan. */
+		while ((d = readdir(dp)) != NULL) {
+			/* Skip current and parent directory. */
+			if (strcmp(d->d_name, ".") == 0
+			    || strcmp(d->d_name, "..") == 0)
+				continue;
+
+			/* skip fully-numerical entries (i.e. mh messages) */
+			strtoul(d->d_name, &tmp, 10);
+			if (*tmp == 0)
+				continue;
+
+			/* otherwise, treat at potential node, and recurse, a bit more expensive than needed, but tough! */
+			if (path[0]) {
+				tmp = g_strdup_printf("%s/%s", path, d->d_name);
+				recursive_scan(store, &fi->child, fi, visited, root, tmp);
+				g_free(tmp);
+			} else {
+				recursive_scan(store, &fi->child, fi, visited, root, d->d_name);
+			}
+		}
+
+		closedir(dp);
+	}
+}
+
+/* scan a .folders file */
+static void
+folders_scan(CamelStore *store, const char *root, const char *top, CamelFolderInfo **fip)
+{
+	CamelFolderInfo *fi;
+	char  line[512], *path, *tmp;
+	CamelStream *stream, *in;
+	struct stat st;
+	GPtrArray *folders;
+	GHashTable *visited;
+	int len;
+
+	tmp = alloca(strlen(root)+16);
+	sprintf(tmp, "%s/.folders", root);
+	stream = camel_stream_fs_new_with_name(tmp, 0, O_RDONLY);
+	if (stream == NULL)
+		return;
+
+	in = camel_stream_buffer_new(stream, CAMEL_STREAM_BUFFER_READ);
+	camel_object_unref(stream);
+	if (in == NULL)
+		return;
+
+	visited = g_hash_table_new(g_str_hash, g_str_equal);
+	folders = g_ptr_array_new();
+
+	while ( (len = camel_stream_buffer_gets((CamelStreamBuffer *)in, line, sizeof(line))) > 0) {
+		/* ignore blank lines */
+		if (len <= 1)
+			continue;
+		/* check for invalidly long lines, we abort evreything and fallback */
+		if (line[len-1] != '\n') {
+			int i;
+
+			for (i=0;i<folders->len;i++)
+				camel_folder_info_free(folders->pdata[i]);
+			g_ptr_array_set_size(folders, 0);
+			break;
+		}
+		line[len-1] = 0;
+
+		/* check for \r ? */
+
+		if (top && top[0]) {
+			int toplen = strlen(top);
+
+			/* check is subdir */
+			if (strncmp(top, line, len) != 0)
+				continue;
+		
+			/* check is not sub-subdir if not recursive */
+			if (( ((CamelMhStore *)store)->flags & CAMEL_STORE_FOLDER_INFO_RECURSIVE) == 0
+			    && (tmp = strrchr(line, '/'))
+			    && tmp > line+toplen)
+				continue;
+		}
+
+		if (g_hash_table_lookup(visited, line) != NULL)
+			continue;
+
+		tmp = g_strdup(line);
+		g_hash_table_insert(visited, tmp, tmp);
+
+		path = g_strdup_printf("%s/%s", root, line);
+		if (stat(path, &st) == 0 && S_ISDIR(st.st_mode)) {
+			fi = folder_info_new(store, root, line);
+			g_ptr_array_add(folders, fi);
+		}
+		g_free(path);
+	}
+
+	if (folders->len)
+		*fip = camel_folder_info_build(folders, NULL, '/', TRUE);
+	g_ptr_array_free(folders, TRUE);
+
+	g_hash_table_foreach(visited, (GHFunc)g_free, NULL);
+	g_hash_table_destroy(visited);
+
+	camel_object_unref(in);
+}
+
+/* FIXME: move to camel-local, this is shared with maildir code */
+static guint inode_hash(const void *d)
+{
+	const struct _inode *v = d;
+
+	return v->inode ^ v->dnode;
+}
+
+static gboolean inode_equal(const void *a, const void *b)
+{
+	const struct _inode *v1 = a, *v2 = b;
+	
+	return v1->inode == v2->inode && v1->dnode == v2->dnode;
+}
+
+static void inode_free(void *k, void *v, void *d)
+{
+	g_free(k);
+}
+
+static CamelFolderInfo *
+get_folder_info (CamelStore *store, const char *top, guint32 flags, CamelException *ex)
+{
+	CamelFolderInfo *fi = NULL;
+	char *root;
+
+	root = ((CamelService *)store)->url->path;
+	
+	/* use .folders if we are supposed to */
+	if (((CamelMhStore *)store)->flags & CAMEL_MH_DOTFOLDERS) {
+		folders_scan(store, root, top, &fi);
+	} else {
+		GHashTable *visited = g_hash_table_new(inode_hash, inode_equal);
+
+		if (top == NULL)
+			top = "";
+
+		recursive_scan(store, &fi, NULL, visited, root, top);
+
+		/* if we actually scanned from root, we have a "" root node we dont want */
+		if (fi != NULL && top[0] == 0) {
+			CamelFolderInfo *rfi;
+
+			rfi = fi;
+			fi = rfi->child;
+			rfi->child = NULL;
+			camel_folder_info_free(rfi);
+		}
+
+		g_hash_table_foreach(visited, inode_free, NULL);
+		g_hash_table_destroy(visited);
+	}
+
+	return fi;
+}

camel/providers/local/camel-mh-store.h

@@ -34,9 +34,14 @@ extern "C" {
 #define CAMEL_MH_STORE_CLASS(k) (CAMEL_CHECK_CLASS_CAST ((k), CAMEL_MH_STORE_TYPE, CamelMhStoreClass))
 #define CAMEL_IS_MH_STORE(o)    (CAMEL_CHECK_TYPE((o), CAMEL_MH_STORE_TYPE))
 
+enum {
+	CAMEL_MH_DOTFOLDERS = (1<<0), /* update/use .folders file */
+};
+
 typedef struct {
 	CamelLocalStore parent_object;
 
+	guint32 flags;
 } CamelMhStore;
 
 typedef struct {

camel/providers/local/camel-mh-summary.c

@@ -39,6 +39,8 @@
 #include "camel-mh-summary.h"
 #include <camel/camel-mime-message.h>
 
+#include "camel-private.h"
+
 #define d(x) /*(printf("%s(%d): ", __FILE__, __LINE__),(x))*/
 
 #define CAMEL_MH_SUMMARY_VERSION (0x2000)
@@ -135,11 +137,14 @@ static char *mh_summary_next_uid_string(CamelFolderSummary *s)
 	int fd = -1;
 	guint32 uid;
 	char *name;
+	char *uidstr;
 
 	/* if we are working to add an existing file, then use current_uid */
-	if (mhs->priv->current_uid)
-		return g_strdup(mhs->priv->current_uid);
-
+	if (mhs->priv->current_uid) {
+		uidstr = g_strdup(mhs->priv->current_uid);
+		/* tell the summary of this, so we always append numbers to the end */
+		camel_folder_summary_set_uid(s, strtoul(uidstr, NULL, 10)+1);
+	} else {
 		/* else scan for one - and create it too, to make sure */
 		do {
 			close(fd);
@@ -152,7 +157,10 @@ static char *mh_summary_next_uid_string(CamelFolderSummary *s)
 
 		close(fd);
 
-	return g_strdup_printf("%u", uid);
+		uidstr = g_strdup_printf("%u", uid);
+	}
+
+	return uidstr;
 }
 
 static int camel_mh_summary_add(CamelLocalSummary *cls, const char *name, int forceindex)
@@ -198,6 +206,20 @@ remove_summary(char *key, CamelMessageInfo *info, CamelLocalSummary *cls)
 	camel_folder_summary_info_free((CamelFolderSummary *)cls, info);
 }
 
+static int
+sort_uid_cmp(const void *ap, const void *bp)
+{
+	const CamelMessageInfo
+		*a = *((CamelMessageInfo **)ap),
+		*b = *((CamelMessageInfo **)bp);
+	const char
+		*auid = camel_message_info_uid(a),
+		*buid = camel_message_info_uid(b);
+	int aval = atoi(auid), bval = atoi(buid);
+
+	return (aval < bval) ? -1 : (aval > bval) ? 1 : 0;
+}
+
 static int
 mh_summary_check(CamelLocalSummary *cls, CamelFolderChangeInfo *changeinfo, CamelException *ex)
 {
@@ -205,6 +227,7 @@ mh_summary_check(CamelLocalSummary *cls, CamelFolderChangeInfo *changeinfo, Came
 	struct dirent *d;
 	char *p, c;
 	CamelMessageInfo *info;
+	CamelFolderSummary *s = (CamelFolderSummary *)cls;
 	GHashTable *left;
 	int i, count;
 	int forceindex;
@@ -265,6 +288,11 @@ mh_summary_check(CamelLocalSummary *cls, CamelFolderChangeInfo *changeinfo, Came
 	g_hash_table_foreach(left, (GHFunc)remove_summary, cls);
 	g_hash_table_destroy(left);
 
+	/* sort the summary based on message number (uid), since the directory order is not useful */
+	CAMEL_SUMMARY_LOCK(s, summary_lock);
+	qsort(s->messages->pdata, s->messages->len, sizeof(CamelMessageInfo *), sort_uid_cmp);
+	CAMEL_SUMMARY_UNLOCK(s, summary_lock);
+
 	return 0;
 }