Improve sort validation in Contacts module

UI/Contacts/UIxContactsListActions.m

@@ -76,15 +76,49 @@
 {
   NSString *s;
   WORequest *rq;
-  
+  static NSArray *sortKeys = nil;
+
+  if (!sortKeys)
+    {
+      sortKeys = [NSArray arrayWithObjects: @"c_cn", @"c_sn", @"c_givenname", @"c_mail",
+                          @"c_screenname", @"c_o", @"c_telephonenumber", nil];
+      [sortKeys retain];
+    }
+
   rq = [context request];
   s = [rq formValueForKey: @"sort"];
-  if (![s length])
+  if (![s length] || ![sortKeys containsObject: s])
     s = [self defaultSortKey];
 
   return s;
 }
 
+- (void) saveSortValue
+{
+  NSMutableDictionary *contactSettings;
+  NSString *ascending, *sort;
+  SOGoUserSettings *us;
+
+  sort = [[context request] formValueForKey: @"sort"];
+  ascending = [[context request] formValueForKey: @"asc"];
+
+  if ([sort length])
+    {
+      sort = [self sortKey];
+      us = [[context activeUser] userSettings];
+      contactSettings = [us objectForKey: @"Contact"];
+      // Must create if it doesn't exist
+      if (!contactSettings)
+        {
+          contactSettings = [NSMutableDictionary dictionary];
+          [us setObject: contactSettings forKey: @"Contact"];
+        }
+      [contactSettings setObject: [NSArray arrayWithObjects: [sort lowercaseString], [NSString stringWithFormat: @"%d", [ascending intValue]], nil]
+                          forKey: @"SortingState"];
+      [us synchronize];
+    }
+}
+
 - (NSArray *) contactInfos
 {
   id <SOGoContactFolder> folder;