First commit.

1 files changed, 54 insertions, 0 deletions

diff --git a/app/services/tartiflette_scoring_service.rb b/app/services/tartiflette_scoring_service.rb
new file mode 100644
index 0000000..3514eb1
--- /dev/null
+++ b/app/services/tartiflette_scoring_service.rb
@@ -0,0 +1,54 @@
+class TartifletteScoringService
+  def self.scored?(tartiflette, session)
+    session[:scored_tartiflettes]&.include?(tartiflette.id)
+  end
+
+  def self.mark_as_scored(tartiflette, session)
+    session[:scored_tartiflettes] ||= []
+    unless scored?(tartiflette, session)
+      session[:scored_tartiflettes] << tartiflette.id
+    end
+  end
+
+  def self.submit_scores(tartiflette, scores, session)
+    scores.each do |criterium_id, value|
+      Score.create!(
+        tartiflette: tartiflette,
+        scoring_criterium_id: criterium_id,
+        value: value[:value]
+      )
+    end
+    mark_as_scored(tartiflette, session)
+  end
+
+  def self.average_score(tartiflette)
+    tartiflette.scores.average(:value).to_f
+  end
+
+  def self.average_score_by_category(tartiflette)
+    tartiflette
+      .scores
+      .group_by { |score| score.scoring_criterium.category }
+      .transform_values do |scores|
+      (scores.sum(&:value).to_f / scores.size).round(2)
+    end
+  end
+
+  def self.total_score_by_category(tartiflette)
+    tartiflette
+      .scores
+      .group_by { |score| score.scoring_criterium.category }
+      .transform_values do |scores|
+      (scores.sum(&:value).to_f / scores.size).round(2)
+    end
+  end
+
+  def self.leaderboard
+    Tartiflette
+      .joins(:scores)
+      .select("tartiflettes.*, SUM(scores.value) AS total_score")
+      .group("tartiflettes.id")
+      .order("total_score DESC")
+      .map { |tartiflette| [ tartiflette, tartiflette.total_score.to_f ] }
+  end
+end