Add geozone stats to polls

app/models/concerns/statisticable.rb

@@ -49,6 +49,23 @@ module Statisticable
       end.to_h
     end
 
+    def participants_by_geozone
+      Geozone.all.order("name").map do |geozone|
+        count = participants.where(geozone: geozone).count
+
+        [
+          geozone.name,
+          {
+            total: {
+              count: count,
+              percentage: calculate_percentage(count, total_participants)
+            },
+            percentage: calculate_percentage(count, geozone.users.count)
+          }
+        ]
+      end.to_h
+    end
+
     private
 
       def total_participants_with_gender
@@ -92,9 +109,10 @@ module Statisticable
 
   class_methods do
     def stats_methods
-      %i[total_participants total_male_participants
-         total_female_participants total_unknown_gender_or_age
-         male_percentage female_percentage participants_by_age]
+      %i[total_participants
+         total_male_participants total_female_participants total_unknown_gender_or_age
+         male_percentage female_percentage
+         participants_by_age participants_by_geozone]
     end
 
     def stats_cache(*method_names)

app/views/shared/stats/_links.html.erb

@@ -9,4 +9,7 @@
   <li>
     <%= link_to t("stats.by_age"), "#participants_by_age" %>
   </li>
+  <li>
+    <%= link_to t("stats.by_geozone"), "#participants_by_geozone" %>
+  </li>
 </ul>

app/views/shared/stats/_participation.html.erb

@@ -56,4 +56,28 @@
       </tbody>
     </table>
   </div>
+
+  <div id="participants_by_geozone" class="stats-group">
+    <h4><%= t("stats.by_geozone") %></h4>
+
+    <table>
+      <thead>
+        <tr>
+          <th><%= t("stats.geozone") %></th>
+          <th><%= t("stats.total") %></th>
+          <th><%= t("stats.geozone_participation") %></th>
+        </tr>
+      </thead>
+
+      <tbody>
+        <% stats[:participants_by_geozone].each do |geozone, participants| %>
+          <tr>
+            <td><%= geozone %></td>
+            <td><%= "#{participants[:total][:count]} (#{number_to_stats_percentage(participants[:total][:percentage])})" %></td>
+            <td><%= number_to_stats_percentage(participants[:percentage]) %></td>
+          </tr>
+        <% end %>
+      </tbody>
+    </table>
+  </div>
 </div>

config/locales/en/stats.yml

@@ -4,9 +4,12 @@ en:
     total_participants: "Participants"
     by_gender: "Participants by gender"
     by_age: "Participants by age"
+    by_geozone: "Participants by district"
     men_percentage: "%{percentage} Men"
     women_percentage: "%{percentage} Women"
     age: "Age"
     age_more_than: "%{start} years old and older"
     age_range: "%{start} - %{finish} years old"
     total: "Total"
+    geozone: "District"
+    geozone_participation: "% District population participation"

config/locales/es/stats.yml

@@ -4,9 +4,12 @@ es:
     total_participants: "Participantes"
     by_gender: "Participación por género"
     by_age: "Participación por grupos de edad"
+    by_geozone: "Participación por distritos"
     men_percentage: "%{percentage} Hombres"
     women_percentage: "%{percentage} Mujeres"
     age: "Edad"
     age_more_than: "De %{start} y más años"
     age_range: "De %{start} a %{finish} años"
     total: "Total"
+    geozone: "Distrito"
+    geozone_participation: "% Partipación población del distrito"

spec/models/poll/stats_spec.rb

@@ -156,6 +156,34 @@ describe Poll::Stats do
     end
   end
 
+  describe "#participants_by_geozone" do
+    it "groups by geozones in alphabetic order" do
+      %w[Oceania Eurasia Eastasia].each { |name| create(:geozone, name: name) }
+
+      expect(stats.participants_by_geozone.keys).to eq %w[Eastasia Eurasia Oceania]
+    end
+
+    it "calculates percentage relative to total participants" do
+      hobbiton = create(:geozone, name: "Hobbiton")
+      rivendel = create(:geozone, name: "Rivendel")
+
+      3.times { create :poll_voter, poll: poll, user: create(:user, :level_two, geozone: hobbiton) }
+      2.times { create :poll_voter, poll: poll, user: create(:user, :level_two, geozone: rivendel) }
+
+      expect(stats.participants_by_geozone["Hobbiton"][:total]).to eq(count: 3, percentage: 60.0)
+      expect(stats.participants_by_geozone["Rivendel"][:total]).to eq(count: 2, percentage: 40.0)
+    end
+
+    it "calculates percentage relative to the geozone population" do
+      midgar = create(:geozone, name: "Midgar")
+
+      create(:poll_voter, poll: poll, user: create(:user, :level_two, geozone: midgar))
+      2.times { create :user, :level_two, geozone: midgar }
+
+      expect(stats.participants_by_geozone["Midgar"][:percentage]).to eq(33.333)
+    end
+  end
+
   describe "#generate" do
     it "generates the correct stats" do
       poll = create(:poll)