[evolution-data-server] Bug #634743 - Moving message on GMail with real Trash set deletes it

[Milan Crha <mcrha src gnome org>]

commit 5161a0f7e4bddbdc8699fc5d93271680d1e73a6b
Author: Milan Crha <mcrha redhat com>
Date:   Tue Feb 1 20:06:03 2011 +0100

    Bug #634743 - Moving message on GMail with real Trash set deletes it

 camel/providers/imap/camel-imap-folder.c |   43 +++++++++++++++++++++++++++--
 1 files changed, 40 insertions(+), 3 deletions(-)
---
diff --git a/camel/providers/imap/camel-imap-folder.c b/camel/providers/imap/camel-imap-folder.c
index 2dea47a..89bb179 100644
--- a/camel/providers/imap/camel-imap-folder.c
+++ b/camel/providers/imap/camel-imap-folder.c
@@ -1476,6 +1476,36 @@ imap_sync_offline (CamelFolder *folder,
 	return TRUE;
 }
 
+static gboolean
+host_ends_with (const gchar *host, const gchar *ends)
+{
+	gint host_len, ends_len;
+
+	g_return_val_if_fail (host != NULL, FALSE);
+	g_return_val_if_fail (ends != NULL, FALSE);
+
+	host_len = strlen (host);
+	ends_len = strlen (ends);
+
+	return ends_len <= host_len && g_ascii_strcasecmp (host + host_len - ends_len, ends) == 0;
+}
+
+static gboolean
+is_google_account (CamelStore *store)
+{
+	CamelService *service;
+
+	g_return_val_if_fail (store != NULL, FALSE);
+	g_return_val_if_fail (CAMEL_IS_STORE (store), FALSE);
+
+	service = CAMEL_SERVICE (store);
+	g_return_val_if_fail (service != NULL, FALSE);
+
+	return service->url && service->url->host && (
+		host_ends_with (service->url->host, "gmail.com") ||
+		host_ends_with (service->url->host, "googlemail.com"));
+}
+
 static void
 move_messages (CamelFolder *src_folder,
                GPtrArray *uids,
@@ -1491,6 +1521,12 @@ move_messages (CamelFolder *src_folder,
 
 	/* moving to the same folder means expunge only */
 	if (src_folder != des_folder) {
+		/* Google's IMAP implementation: Moving to other folder means changing
+		   a tag, so do not delete (move to a real trash) the source message
+		   when moving messages between folders. */
+		if (is_google_account (camel_folder_get_parent_store (src_folder)))
+			return;
+
 		/* do 'copy' to not be bothered with CAMEL_MESSAGE_DELETED again */
 		if (!imap_transfer_messages (
 			src_folder, uids, des_folder, FALSE,
@@ -1511,7 +1547,7 @@ imap_synchronize_sync (CamelFolder *folder,
 	CamelImapStore *store;
 	CamelImapMessageInfo *info;
 	CamelImapFolder *imap_folder = CAMEL_IMAP_FOLDER (folder);
-	gboolean success;
+	gboolean success, is_gmail;
 	CamelFolder *real_junk = NULL;
 	CamelFolder *real_trash = NULL;
 	GError *local_error = NULL;
@@ -1522,6 +1558,7 @@ imap_synchronize_sync (CamelFolder *folder,
 
 	parent_store = camel_folder_get_parent_store (folder);
 	store = CAMEL_IMAP_STORE (parent_store);
+	is_gmail = is_google_account (parent_store);
 
 	if (folder->permanent_flags == 0 || !camel_offline_store_get_online (CAMEL_OFFLINE_STORE (store))) {
 		if (expunge) {
@@ -1623,7 +1660,7 @@ imap_synchronize_sync (CamelFolder *folder,
 			break;
 		}
 
-		if (deleted_uids && (info->info.flags & CAMEL_MESSAGE_DELETED) != 0) {
+		if (deleted_uids && !is_gmail && (info->info.flags & CAMEL_MESSAGE_DELETED) != 0) {
 			/* there is a real trash, do not set it on the server */
 			info->info.flags &= ~CAMEL_MESSAGE_DELETED;
 		}
@@ -1675,7 +1712,7 @@ imap_synchronize_sync (CamelFolder *folder,
 		if (local_error == NULL) {
 			for (j = 0; j < matches->len; j++) {
 				info = matches->pdata[j];
-				if (deleted_uids) {
+				if (deleted_uids && !is_gmail) {
 					/* there is a real trash, do not keep this set */
 					info->info.flags &= ~CAMEL_MESSAGE_DELETED;
 				}