Add the weekly avis usage to Stats

app/assets/stylesheets/new_design/stats.scss

@@ -6,15 +6,25 @@ $blue-hover: rgba(61, 149, 236, 0.8);
 $default-space: 15px;
 
 $new-h1-margin-bottom: 4 * $default-space;
+$new-h2-margin-bottom: 3 * $default-space;
 
-.new-h1 {
+.new-h1,
+.new-h2 {
   color: $dark-grey;
   text-align: center;
-  margin-bottom: $new-h1-margin-bottom;
   font-weight: bold;
+}
+
+.new-h1 {
+  margin-bottom: $new-h1-margin-bottom;
   font-size: 41px;
 }
 
+.new-h2 {
+  margin-bottom: $new-h2-margin-bottom;
+  font-size: 36px;
+}
+
 $statistiques-padding-top: $default-space * 2;
 
 .statistiques {

app/controllers/stats_controller.rb

@@ -20,6 +20,8 @@ class StatsController < ApplicationController
 
     @dossier_instruction_mean_time = dossier_instruction_mean_time(dossiers)
     @dossier_filling_mean_time = dossier_filling_mean_time(dossiers)
+
+    @avis_usage = avis_usage
   end
 
   private
@@ -144,4 +146,23 @@ class StatsController < ApplicationController
       [month, month_average]
     end.to_h
   end
+
+  def avis_usage
+    [3.week.ago, 2.week.ago, 1.week.ago].map do |min_date|
+      max_date = min_date + 1.week
+
+      weekly_dossiers = Dossier.includes(:avis).where(created_at: min_date..max_date).to_a
+
+      weekly_dossiers_count = weekly_dossiers.count
+
+      if weekly_dossiers_count == 0
+        result = 0
+      else
+        weekly_dossier_with_avis_count = weekly_dossiers.select { |dossier| dossier.avis.present? }.count
+        result = ((weekly_dossier_with_avis_count.to_f / weekly_dossiers_count) * 100).round(2)
+      end
+
+      [min_date.to_i, result]
+    end
+  end
 end

app/views/stats/index.html.haml

@@ -77,3 +77,13 @@
                 :colors => ["rgba(61, 149, 236, 1)"]
 
     .clearfix
+
+  - if administration_signed_in?
+    %h2.new-h2 Avis
+
+    .stat-cards
+      .stat-card.stat-card-half.pull-left
+        %span.stat-card-title Taux d'utilisation des avis
+        = line_chart @avis_usage, ytitle: 'dossiers avec avis / total dossiers', xtitle: 'semaines'
+
+      .clearfix

spec/controllers/stats_controller_spec.rb

@@ -210,4 +210,18 @@ describe StatsController, type: :controller do
 
     it { expect(subject).to eq(@expected_hash) }
   end
+
+  describe '#avis_usage' do
+    let!(:dossier) { create(:dossier) }
+    let!(:avis_with_dossier) { create(:avis) }
+    let!(:dossier2) { create(:dossier) }
+
+    before do
+      Timecop.freeze(Time.now)
+    end
+
+    subject { StatsController.new.send(:avis_usage) }
+
+    it { expect(subject).to match([[3.week.ago.to_i, 0], [2.week.ago.to_i, 0], [1.week.ago.to_i, 33.33]]) }
+  end
 end