fix updating of recurring todo and create a form helper for filling the recurring todo edit

form

app/controllers/recurring_todos/form_helper.rb

@@ -0,0 +1,50 @@
+module RecurringTodos
+
+  class FormHelper
+
+    def initialize(recurring_todo)
+      @recurring_todo = recurring_todo
+    end
+
+    def create_pattern(pattern_class)
+      pattern = pattern_class.new(@recurring_todo.user)
+      pattern.build_from_recurring_todo(@recurring_todo)
+      pattern
+    end
+
+    def daily_pattern
+      @daily_pattern ||= create_pattern(DailyRepeatPattern)
+    end
+
+    def weekly_pattern
+      @weekly_pattern ||= create_pattern(WeeklyRepeatPattern)
+    end
+
+    def monthly_pattern
+      @monthly_pattern ||= create_pattern(MonthlyRepeatPattern)
+    end
+
+    def yearly_pattern
+      @yearly_pattern ||= create_pattern(YearlyRepeatPattern)
+    end
+
+    def method_missing(method, *args)
+      if method.to_s =~ /^daily_(.+)$/
+        daily_pattern.send($1, *args)
+      elsif method.to_s =~ /^weekly_(.+)$/
+        weekly_pattern.send($1, *args)
+      elsif method.to_s =~ /^monthly_(.+)$/
+        monthly_pattern.send($1, *args)
+      elsif method.to_s =~ /^yearly_(.+)$/
+        yearly_pattern.send($1, *args)
+      elsif method.to_s =~ /^on_(.+)$/ # on_monday, on_tuesday, etc.
+        weekly_pattern.send(method, *args)
+      else
+        # no match, let @recurring_todo handle it, or fail
+        @recurring_todo.send(method, *args)
+      end
+    end
+
+  end
+
+end