group subscription tags with number of subscribers (#5224)

* group tags with number of subscribers

* cleanup

* fix codeclimate errors

* refactoring the subscriber count range and stats display

* fix codeclimate failing lint test

* fix indent on stats view

app/controllers/stats_controller.rb

@@ -5,7 +5,7 @@ def subscriptions
       @tags[tag.tagname] = @tags[tag.tagname] || 0
       @tags[tag.tagname] += 1
     end
-    render plain: @tags.inspect, status: 200
+    @tags = @tags.group_by { |_k, v| v / 10 }
   end
 
   def range

app/views/stats/subscriptions.html.erb

@@ -1,7 +1,33 @@
 <div class="col-md-3">
-    <h4> About this page </h4>
-    <p> People subscribe to tags so that they can be updated when a research is posted with the tag they are subscribed to. This page shows the number of subscriptions and subscription rates on different tags. </p>
+	<h4> About this page </h4>
+	<p> People subscribe to tags so that they can be updated when a research is posted with the tag they are subscribed to. This page shows the number of subscriptions and subscription rates on different tags. </p>
 </div>
 <div class="col-md-8 col-md-offset-1">
-    <h2>Subscriptions</h2>
-</div>
+	<h2>Subscriptions</h2>
+	<table class="table inline-grid">
+		<tr>
+			<thead>
+				<th>Subscriptions</th>
+				<th>Tags</th>
+			</thead>
+		</tr>
+		<% @tags.each do |range,tags| %>
+		<tr>
+			<tbody>
+				<td>
+					<%= range * 10 %> -
+					<%= range * 10 + 9 %>
+				</td>
+				<td>
+					<% tags.each do |tag| %>
+					<p>
+						<%= tag[0]%>:
+						<%=tag[1] %>
+					</p>
+					<%end%>
+				</td>
+			</tbody>
+		</tr>
+		<% end  %>
+	</table>
+</div>