Add geo data helper

app/helpers/champ_helper.rb

@@ -3,4 +3,15 @@ module ChampHelper
     types_without_label = [TypeDeChamp.type_champs.fetch(:header_section), TypeDeChamp.type_champs.fetch(:explication)]
     !types_without_label.include?(champ.type_champ)
   end
+
+  def geo_data(champ)
+    # rubocop:disable Rails/OutputSafety
+    raw({
+      position: champ.position,
+      selection: champ.value.present? ? JSON.parse(champ.value) : [],
+      quartiersPrioritaires: champ.quartiers_prioritaires? ? champ.quartiers_prioritaires : [],
+      cadastres: champ.cadastres? ? champ.cadastres : []
+    }.to_json)
+    # rubocop:enable Rails/OutputSafety
+  end
 end