validate.rb in reform-1.2.0.beta1

- old
+ new

@@ -24,12 +24,22 @@
       end
 
       # FIXME: solve this with a dedicated Populate Decorator per Form.
       representable_attrs.each do |attr|
         attr.merge!(:parse_filter => Representable::Coercion::Coercer.new(attr[:coercion_type])) if attr[:coercion_type]
+
+        attr.merge!(:skip_if => Skip::AllBlank.new) if attr[:skip_if] == :all_blank
+        attr.merge!(:skip_parse => attr[:skip_if]) if attr[:skip_if]
       end
 
+
+      representable_attrs.each do |attr|
+        next if attr[:form]
+
+        attr.merge!(:parse_filter => Changed.new)
+      end
+
       super
     end
   end
 
 
@@ -69,9 +79,37 @@
         else
           fields.send("#{binding.setter}", form) # :setter is currently overwritten by :parse_strategy.
         end
       end
     end # PopulateIfEmpty
+  end
+
+
+  module Skip
+    class AllBlank
+      include Uber::Callable
+
+      def call(form, params, options)
+        # TODO: hahahahahaha.
+        properties = options.binding.representer_module.representer_class.representable_attrs[:definitions].keys
+
+        properties.each { |name| params[name].present? and return false }
+        true # skip
+      end
+    end
+  end
+
+
+  class Changed
+    def call(fragment, params, options)
+      # options is a Representable::Options object holding all the stakeholders. this is here becaues of pass_options: true.
+      form = options.represented
+      name = options.binding.name
+
+      form.changed[name] = form.send(name) != fragment
+
+      fragment
+    end
   end
 
   # 1. Populate the form object graph so that each incoming object has a representative form object.
   # 2. Deserialize. This is wrong and should be done in 1.
   # 3. Validate the form object graph.