added most_backed report

app/admin/dashboards.rb

@@ -1,9 +1,16 @@
+#encoding: utf-8
 ActiveAdmin::Dashboards.build do
 
+  section "Relatorios" do
+    ul do
+      li link_to 'Usuários que mais apoiaram', most_backed_report_path
+    end
+  end
+
   # Define your dashboard sections here. Each block will be
   # rendered on the dashboard in the context of the view. So just
   # return the content which you would like to display.
-  
+
   # == Simple Dashboard Section
   # Here is an example of a simple dashboard section
   #
@@ -14,7 +21,7 @@
   #       end
   #     end
   #   end
-  
+
   # == Render Partial Section
   # The block is rendered within the context of the view, so you can
   # easily render a partial rather than build content in ruby.
@@ -24,7 +31,7 @@
   #       render 'recent_posts' # => this will render /app/views/admin/dashboard/_recent_posts.html.erb
   #     end
   #   end
-  
+
   # == Section Ordering
   # The dashboard sections are ordered by a given priority from top left to
   # bottom right. The default priority is 10. By giving a section numerically lower

app/controllers/reports_controller.rb

@@ -15,4 +15,12 @@ def location_by_project
               :type => 'text/csv; charset=utf-8; header=present',
               :disposition => "attachment; filename=location_report_of_project_#{params[:project_id]}.csv"
   end
+
+  def users_most_backed
+    return unless require_admin
+    @csv = Reports::Users::Backers.most_backed
+    send_data @csv,
+              :type => 'text/csv; charset=utf-8; header=present',
+              :disposition => "attachment; filename=user_most_backed_#{params[:project_id]}.csv"
+  end
 end

config/routes.rb

@@ -8,6 +8,7 @@
   root :to => "projects#index"
   match "/reports/financial/:project_id/backers" => "reports#financial_by_project", :as => :backers_financial_report
   match "/reports/location/:project_id/backers" => "reports#location_by_project", :as => :backers_location_report
+  match "/reports/users_most_backed" => "reports#users_most_backed", :as => :most_backed_report
 
   match '/sitemap' => "static#sitemap", :as => :sitemap
   # Static Pages

lib/reports/users.rb

@@ -0,0 +1,5 @@
+module Reports
+  module Users
+    autoload :Backers, 'reports/users/backers'
+  end
+end

lib/reports/users/backers.rb

@@ -0,0 +1,37 @@
+#encoding:utf-8
+module Reports
+  module Users
+    class Backers
+      class << self
+        def most_backed(limit=20)
+          @users = User.joins(:backs).select(
+          <<-SQL
+            users.id,
+            users.name,
+            count(backers.id) as count_backs
+          SQL
+          ).order("count_backs desc").group("users.name, users.id").limit(limit)
+
+          @csv = CSV.generate(:col_sep => ',') do |csv_string|
+
+            # TODO: Change this later *order and names to use i18n*
+            # for moment header only in portuguese.
+            csv_string << [
+              'ID',
+              'Nome do apoiador',
+              'Total de apoios'
+            ]
+
+            @users.each do |user|
+              csv_string << [
+                user.id,
+                user.display_name,
+                user.count_backs
+              ]
+            end
+          end
+        end
+      end
+    end
+  end
+end