Add poll stats by channel

Note we currently don't have a way to get the votes by mail, so that
section is always blank.

app/assets/stylesheets/stats.scss

@@ -40,6 +40,18 @@
       content: image-url('stats_woman.png');
     }
 
+    &.web::before {
+      content: image-url('stats_web.png');
+    }
+
+    &.booth::before {
+      content: image-url('stats_booth.png');
+    }
+
+    &.mail::before {
+      content: image-url('stats_mail.png');
+    }
+
     .content {
       display: inline-block;
       margin-right: $line-height * 2;

app/views/polls/stats.html.erb

@@ -11,6 +11,9 @@
 
       <p><strong><%= link_to t("stats.advanced"), "#advanced_statistics" %></strong></p>
       <ul class="menu vertical">
+        <li>
+          <%= link_to t("stats.polls.by_channel"), "#stats_by_channel" %>
+        </li>
         <li>
           <%= link_to t("stats.polls.vote_by_channel"), "#vote_stats_by_channel" %>
         </li>
@@ -23,6 +26,20 @@
       <div id="advanced_statistics">
         <h3 class="section-title"><%= t("stats.advanced") %></h3>
 
+        <div id="stats_by_channel" class="stats-group">
+          <h4><%= t("stats.polls.by_channel") %></h4>
+
+          <% Poll::Stats::CHANNELS.each do |channel| %>
+            <%= number_with_info_tags(
+              @stats[:"total_participants_#{channel}"],
+              t("stats.polls.#{channel}_percentage",
+                percentage: number_to_stats_percentage(@stats[:"total_participants_#{channel}_percentage"])
+              ),
+              html_class: channel
+            ) %>
+          <% end %>
+        </div>
+
         <div id="vote_stats_by_channel" class="stats-group">
           <h4><%= t("stats.polls.vote_by_channel") %></h4>
 

config/locales/en/stats.yml

@@ -15,4 +15,8 @@ en:
     geozone: "District"
     geozone_participation: "% District population participation"
     polls:
+      by_channel: "Participants by channel"
       vote_by_channel: "Vote type by channel"
+      web_percentage: "%{percentage} Web"
+      booth_percentage: "%{percentage} Booths"
+      mail_percentage: "%{percentage} Mail"

config/locales/es/stats.yml

@@ -15,4 +15,8 @@ es:
     geozone: "Distrito"
     geozone_participation: "% Partipación población del distrito"
     polls:
+      by_channel: "Participación por medio"
       vote_by_channel: "Votos emitidos por medio"
+      web_percentage: "%{percentage} Web"
+      booth_percentage: "%{percentage} Urnas"
+      mail_percentage: "%{percentage} Correo"