feat: render author cell with current_user

Author: ElliottAYoung

app/cells/plugins/core/author/input.haml

@@ -1 +1,4 @@
-
+.mdl-textfield.mdl-js-textfield.authorfield
+  = render_field_id
+  = render_label
+  = render_input

app/cells/plugins/core/author_cell.rb

@@ -10,6 +10,18 @@ def input
       def current_user
         "#{@options[:current_user].firstname} #{@options[:current_user].lastname}"
       end
+
+      def value
+        data&.[]('author_name') || current_user
+      end
+
+      def render_label
+        @options[:form].label 'data[text]', field.name, class: 'mdl-textfield__label'
+      end
+
+      def render_input
+        @options[:form].text_field 'data[text]', value: value, placeholder: @options[:placeholder], class: 'mdl-textfield__input', required: required?
+      end
     end
   end
 end