Add a graph showing the user satisfaction

app/controllers/stats_controller.rb

@@ -12,6 +12,7 @@ class StatsController < ApplicationController
     @procedures_count = procedures.count
     @dossiers_count = dossiers.count
 
+    @satisfaction_usagers = satisfaction_usagers
     @dossiers_states = dossiers_states
 
     @procedures_cumulative = cumulative_hash(procedures, :published_at)
@@ -86,6 +87,37 @@ class StatsController < ApplicationController
     }
   end
 
+  def satisfaction_usagers
+    legend = {
+      "0" => "Mécontents",
+      "1" => "Neutres",
+      "2" => "Satisfaits"
+    }
+
+    totals = Feedback.where(created_at: 5.weeks.ago..Time.now).group_by_week(:created_at).count
+
+    (0..2).map do |mark|
+      data = Feedback
+        .where(created_at: 5.weeks.ago..Time.now, mark: mark)
+        .group_by_week(:created_at)
+        .count
+        .map do |week, count|
+          total = totals[week]
+
+          if total > 0
+            [week, (count.to_f / total).round(2)]
+          else
+            0
+          end
+        end.to_h
+
+      {
+        name: legend[mark.to_s],
+        data: data
+      }
+    end
+  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
+        Satisfaction usager
+
+      .chart-container
+        .chart
+          = line_chart @satisfaction_usagers,
+            colors: ["#F28900", "rgba(161, 0, 5, 0.9)", "#15AD70"]
+
     .stat-card.stat-card-half.pull-left
       %span.stat-card-title
         Répartition des dossiers