Add flipflop config

app/lib/flipflop/strategies/user_preference_strategy.rb

@@ -0,0 +1,44 @@
+module Flipflop::Strategies
+  class UserPreferenceStrategy < AbstractStrategy
+    def self.default_description
+      "Allows configuration of features per user."
+    end
+
+    def switchable?
+      false
+    end
+
+    def enabled?(feature)
+      # Can only check features if we have the user's session.
+      if request?
+        legacy_enabled?(feature) || find_current_administrateur&.feature_enabled?(feature)
+      end
+    end
+
+    private
+
+    def legacy_enabled?(feature)
+      if self.class.legacy_features_map.present?
+        ids = self.class.legacy_features_map["#{feature}_allowed_for_admin_ids"]
+        ids.present? && find_current_administrateur&.id&.in?(ids)
+      end
+    end
+
+    LEGACY_CONFIG_FILE = Rails.root.join("config", "initializers", "features.yml")
+
+    def self.legacy_features_map
+      @@legacy_features_map = begin
+        if File.exist?(LEGACY_CONFIG_FILE)
+          YAML.load_file(LEGACY_CONFIG_FILE)
+        end
+      end
+    end
+
+    def find_current_administrateur
+      if request.session["warden.user.user.key"]
+        administrateur_id = request.session["warden.user.user.key"][0][0]
+        Administrateur.find_by(id: administrateur_id)
+      end
+    end
+  end
+end