Add a chart showing the dossiers state repartition

app/controllers/stats_controller.rb

@@ -12,6 +12,8 @@ class StatsController < ApplicationController
     @procedures_count = procedures.count
     @dossiers_count = dossiers.count
 
+    @dossiers_states = dossiers_states
+
     @procedures_cumulative = cumulative_hash(procedures, :published_at)
     @procedures_in_the_last_4_months = last_four_months_hash(procedures, :published_at)
 
@@ -75,6 +77,15 @@ class StatsController < ApplicationController
 
   private
 
+  def dossiers_states
+    {
+      'Brouilllon'      => Dossier.state_brouillon.count,
+      'En construction' => Dossier.state_en_construction.count,
+      'En instruction'  => Dossier.state_en_instruction.count,
+      'Terminé'         => Dossier.state_termine.count
+    }
+  end
+
   def cloned_from_library_procedures_ratio
     [3.weeks.ago, 2.weeks.ago, 1.week.ago].map do |date|
       min_date = date.beginning_of_week

app/views/stats/index.html.haml

@@ -15,6 +15,15 @@
       %span.big-number-card-number
         = number_with_delimiter(@dossiers_count)
 
+    .stat-card.stat-card-half.pull-left
+      %span.stat-card-title
+        Répartition des dossiers
+
+      .chart-container
+        .chart
+          = pie_chart @dossiers_states,
+            colors: ["rgba(222, 238, 265, 1)", "rgba(191, 220, 249, 1)", "rgba(113, 176, 239, 1)", "rgba(61, 149, 236, 1)"]
+
     .stat-card.stat-card-half.pull-left
       %ul.segmented-control.pull-right
         %li.segmented-control-item.segmented-control-item-active{ :onclick => "DS.toggleChart(event, '.monthly-procedures-chart');" }