FEATURE: Arbitrary validations for site settings

lib/site_setting_extension.rb

@@ -1,7 +1,9 @@
 require_dependency 'enum'
 require_dependency 'site_settings/db_provider'
+require 'site_setting_validations'
 
 module SiteSettingExtension
+  include SiteSettingValidations
 
   # For plugins, so they can tell if a feature is supported
   def supported_types
@@ -303,6 +305,10 @@ module SiteSettingExtension
       end
     end
 
+    if self.respond_to? "validate_#{name}"
+      send("validate_#{name}", val)
+    end
+
     provider.save(name, val, type)
     current[name] = convert(val, type)
     clear_cache!