add statistics from users

Signed-off-by: Alexandre Arias <apa13@inf.ufpr.br>

Gemfile.lock

@@ -127,6 +127,7 @@ GEM
       equalizer (~> 0.0.9)
     connection_pool (2.2.0)
     curb (0.8.8)
+    dalli (2.7.4)
     debug_inspector (0.0.2)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
@@ -378,6 +379,7 @@ DEPENDENCIES
   chart-js-rails
   coffee-rails (~> 4.1.0)
   curb (~> 0.8.8)
+  dalli
   devise
   devise_token_auth
   dspace_rest_client (~> 1.1.0)

app/controllers/management/statistics_controller.rb

 class Management::StatisticsController < ManagementController
   def index
-
-
   end
 
-  def usuarios
-    
+  def users
+    user_repository get_number_of_users
   end
 
   def downloads
@@ -13,9 +11,11 @@ class Management::StatisticsController < ManagementController
   end
 
   def accesses
+
   end
 
   def highlights
+
   end
 
   def collections

app/repositories/orient_db/user_repository.rb

@@ -24,6 +24,9 @@ module OrientDb
       (result.count > 0)
     end
 
+    def get_number_of_users
+      result = connection.query sprintf("SELECT COUNT(@rid) FROM User").to_i
+    end
     private
 
     def odb_class

app/views/welcome/index.html.erb

@@ -70,13 +70,18 @@
       <div class="row learning-object-columns">
         <h2>Destaque por assunto</h2>
         <% @subjects.each do |subject|%>
-          <div class="row mainpage-subject-element">
-            <h4><b><%= subject.name %></b></h4>
-            <%= render subject.highlights.first, orientation: 'vertical'%>
-            <p class="more">
-              <a href="#">Ver Mais</a>
-            </p>
-          </div>
+
+          <%= debug subject%>
+
+          <% if !subject.highlights.empty? %>
+            <div class="row mainpage-subject-element">
+              <h4><b><%= subject.name %></b></h4>
+              <%= render subject.highlights.first, orientation: 'vertical'%>
+              <p class="more">
+                <a href="#">Ver Mais</a>
+              </p>
+            </div>
+          <% end %>
         <% end %>
       </div>
     <% end %>