Add 'Show on a map' links to archived petitions

Author: pixeltrix

app/models/archived/petition.rb

@@ -59,6 +59,7 @@ class Petition < ActiveRecord::Base
     default_scope { preload(:parliament) }
 
     delegate :threshold_for_response, :threshold_for_debate, to: :parliament
+    delegate :show_on_a_map?, to: :parliament
 
     with_options allow_nil: true, prefix: true do
       delegate :name, :email, to: :creator

app/models/parliament.rb

@@ -3,6 +3,8 @@
 class Parliament < ActiveRecord::Base
   include ActiveSupport::NumberHelper
 
+  CUTOFF_DATE = Date.civil(2015, 5, 7)
+
   has_many :petitions, inverse_of: :parliament, class_name: "Archived::Petition"
 
   class << self
@@ -184,4 +186,8 @@ def formatted_threshold_for_response
   def formatted_threshold_for_debate
     number_to_delimited(threshold_for_debate)
   end
+
+  def show_on_a_map?
+    opening_at > CUTOFF_DATE
+  end
 end

app/views/archived/petitions/show.html.erb

@@ -66,6 +66,11 @@
       <div class="signature-count-graph" aria-hidden="true">
         <span class="signature-count-current" style="width: <%= archived_threshold_percentage(@petition) %>"></span>
       </div>
+      <% if @petition.show_on_a_map? %>
+        <p class="signatures-on-a-map">
+          <a href="https://petitionmap.unboxedconsulting.com/?petition=<%= @petition.id %>">Show on a map</a>
+        </p>
+      <% end %>
       <p class="signature-count-goal">
         <%= number_with_delimiter(archived_threshold(@petition)) %>
       </p>