Define a DEFAULT_FRESHLY_CLOSED_LIMIT constant

Define DEFAULT_FRESHLY_CLOSED_LIMIT in the Note model to allow the 7 day limit to be referenced in the API controller and in the new `freshy_closed_until` logic. The default value is `7.days`. API users can still override this, but the website uses that default for the duration of the green "freshly closed" notes markers.

app/controllers/api/notes_controller.rb

@@ -351,9 +351,9 @@ module Api
     # on their status and the user's request parameters
     def closed_condition(notes)
       closed_since = if params[:closed]
-                       params[:closed].to_i
+                       params[:closed].to_i.days
                      else
-                       7
+                       Note::DEFAULT_FRESHLY_CLOSED_LIMIT
                      end
 
       if closed_since.negative?
@@ -361,7 +361,7 @@ module Api
       elsif closed_since.positive?
         notes.where(:status => "open")
              .or(notes.where(:status => "closed")
-                      .where(notes.arel_table[:closed_at].gt(Time.now.utc - closed_since.days)))
+                      .where(notes.arel_table[:closed_at].gt(Time.now.utc - closed_since)))
       else
         notes.where(:status => "open")
       end

app/models/note.rb

@@ -37,6 +37,8 @@ class Note < ApplicationRecord
 
   after_initialize :set_defaults
 
+  DEFAULT_FRESHLY_CLOSED_LIMIT = 7.days
+
   # Sanity check the latitude and longitude and add an error if it's broken
   def validate_position
     errors.add(:base, "Note is not in the world") unless in_world?
@@ -75,7 +77,7 @@ class Note < ApplicationRecord
   def freshly_closed_until
     return nil unless closed?
 
-    closed_at + 7.days
+    closed_at + DEFAULT_FRESHLY_CLOSED_LIMIT
   end
 
   # Return the author object, derived from the first comment