[#3356] Let types de champ decide their tags

app/models/concerns/tags_substitution_concern.rb

@@ -167,15 +167,11 @@ module TagsSubstitutionConcern
   end
 
   def types_de_champ_tags(types_de_champ, available_for_states)
-    types_de_champ.flat_map do |tdc|
+    tags = types_de_champ.flat_map(&:tags_for_template)
-      [
+    tags.each do |tag|
-        {
+      tag[:available_for_states] = available_for_states
-          libelle: tdc.libelle,
-          description: tdc.description,
-          available_for_states: available_for_states
-        }
-      ]
     end
+    tags
   end
 
   def replace_tags(text, dossier)

app/models/type_de_champ.rb

@@ -174,6 +174,15 @@ class TypeDeChamp < ApplicationRecord
     end
   end
 
+  def tags_for_template
+    [
+      {
+        libelle: libelle,
+        description: description
+      }
+    ]
+  end
+
   private
 
   def setup_procedure